WO2012029319A1

WO2012029319A1 - Battery module, battery system, electric vehicle, moving object, power storage device, power supply device, and electrical apparatus

Info

Publication number: WO2012029319A1
Application number: PCT/JP2011/004895
Authority: WO
Inventors: 由知西原; 計美大倉
Original assignee: 三洋電機株式会社
Priority date: 2010-08-31
Filing date: 2011-08-31
Publication date: 2012-03-08

Abstract

A battery module of the present invention is provided with: a battery block containing a plurality of battery cells; a voltage detection circuit for detecting the voltage of each battery cell; a holding member for holding the voltage detection circuit; a relay terminal provided to the holding member, and electrically connected to an electrode terminal of one of the plurality of battery cells; and a plurality of wires for connecting the plurality of electrode terminals of the plurality of battery cells to the voltage detection circuit. The relay terminal and the plurality of wires are arranged so as to avoid overlapping each other on the holding member. The voltage detection circuit is held by the holding member in the battery module. The plurality of electrode terminals of the plurality of battery cells are connected to the voltage detection circuit by the plurality of wires. The relay terminal provided to the holding member is electrically connected to the electrode terminal of one of the plurality of battery cells. The relay terminal and the plurality of wires are arranged so as to avoid overlapping each other on the holding member.

Description

Battery module, battery system, electric vehicle, moving object, power storage device, power supply device, and electric device

The present invention relates to a battery module, a battery system, an electric vehicle, a moving body, a power storage device, a power supply device, and an electric device.

A battery system including a plurality of battery cells that can be charged and discharged is used as a driving source for a moving body such as an electric automobile. The battery system described in Patent Document 1 includes a battery block (battery block) formed by stacking a plurality of battery cells (battery cells) and a pair of end plates that are fixed so as to sandwich the stacked battery cells in the stacking direction. (End face frame), a connector for connecting the pair of end face frames, and an output line (power line) connected to the electrode terminal of the battery block.
JP 2010-80353 A

In the above battery system, an output line is connected to the electrode terminal of one of the battery cells in order to take out the power of the battery block. Moreover, in order to detect the terminal voltage of a some battery cell, it is necessary to connect the electrode terminal of a some battery cell, and a voltage detection circuit with a some voltage detection line. In this case, the routing of the output line and the plurality of voltage detection lines becomes complicated, and the wiring work in the battery system becomes complicated.

An object of the present invention is to provide a battery module, a battery system, an electric vehicle, a moving body, a power storage device, a power supply device, and an electric device that can simplify a wiring structure and facilitate wiring work.

A battery module according to one aspect of the present invention is provided in a battery block including a plurality of battery cells, a voltage detection circuit that detects a voltage of each battery cell, a holding member that holds the voltage detection circuit, and a plurality of holding members. A relay terminal electrically connected to one of the electrode terminals of the battery cell, and a plurality of wirings connecting the plurality of electrode terminals of the plurality of battery cells and the voltage detection circuit, the relay terminal and the plurality of wirings Is arranged so as not to overlap each other on the holding member.

According to the present invention, it is possible to simplify the wiring structure of the battery module and facilitate the wiring work.

FIG. 1 is an external perspective view of a battery module. FIG. 2 is a plan view of the battery module. FIG. 3 is an end view of the battery module. FIG. 4 is a schematic plan view for explaining the details of the connection between the bus bar and the printed circuit board. FIG. 5 is a plan view of one side of the end face frame of FIGS. FIG. 6 is an external perspective view showing a procedure for attaching the relay member to the battery block. FIG. 7 is an external perspective view showing a procedure for attaching the relay member to the battery block. FIG. 8 is an external perspective view for explaining the attachment of the gas duct to the battery block. FIG. 9 is a block diagram for explaining the configuration and operation of a voltage detection circuit and a communication circuit mounted on a printed circuit board. FIG. 10 is an external perspective view showing the battery module according to the second embodiment. FIG. 11 is a plan view of the battery module. FIG. 12 is an external perspective view for explaining the connection of the power supply line to the battery module according to the second embodiment. FIG. 13 is an exploded perspective view of the battery module according to the third embodiment. FIG. 14 is an exploded perspective view of the battery module according to the fourth embodiment. FIG. 15 is a perspective view of the lid member of FIG. 14 as viewed obliquely from below. FIG. 16 is a perspective view of the lid member of FIG. 14 as viewed obliquely from above. FIG. 17 is an exploded perspective view of the battery module according to the fifth embodiment. 18 is a perspective view of the lid member of FIG. 17 as viewed obliquely from below. FIG. 19 is a perspective view of the lid member of FIG. 17 as viewed obliquely from above. FIG. 20 is an exploded perspective view of the battery module according to the sixth embodiment. FIG. 21 is a block diagram illustrating a configuration of a battery system including the battery module according to the first embodiment. FIG. 22 is a schematic plan view showing a first configuration example of the battery system of FIG. FIG. 23 is a schematic plan view showing a second configuration example of the battery system of FIG. FIG. 24 is a schematic plan view showing a third configuration example of the battery system of FIG. FIG. 25 is a schematic plan view showing a fourth configuration example of the battery system of FIG. FIG. 26 is a schematic plan view showing a fifth configuration example of the battery system of FIG. FIG. 27 is a block diagram illustrating a configuration of an electric automobile including a battery system. FIG. 28 is a block diagram illustrating a configuration of a power supply device including a battery system.

[1] First Embodiment Hereinafter, a battery module according to a first embodiment will be described with reference to the drawings. Note that the battery system using the battery module according to the present embodiment is mounted on an electric vehicle (for example, an electric automobile) using electric power as a drive source.

(1) Structure of battery module The structure of the battery module 100 according to the first embodiment will be described. 1 is an external perspective view of the battery module 100, FIG. 2 is a plan view of the battery module 100, and FIG. 3 is an end view of the battery module 100.

In FIGS. 1 to 3 and FIGS. 4 to 8 and 10 to 19 described later, as shown by arrows X, Y, and Z, three directions orthogonal to each other are defined as an X direction, a Y direction, and a Z direction. Define. In this example, the X direction and the Y direction are directions parallel to the horizontal plane, and the Z direction is a direction orthogonal to the horizontal plane. Further, the upward direction is the direction in which the arrow Z faces.

As shown in FIGS. 1 to 3, in the battery module 100, a plurality of battery cells 10 having a flat, substantially rectangular parallelepiped shape are arranged in the X direction. Each battery cell 10 is a secondary battery such as a lithium ion battery or a nickel metal hydride battery.

The plurality of battery cells 10 are integrally fixed by a pair of end face frames 92, a pair of upper end frames 93, and a pair of lower end frames 94 in a state of being arranged in the X direction. The plurality of battery cells 10, the pair of end face frames 92, the pair of upper end frames 93, and the pair of lower end frames 94 constitute a substantially rectangular parallelepiped battery block 10BB. In the present embodiment, the end face frame 92 is formed of a metal or an alloy such as an aluminum alloy die cast, and the upper end frame 93 and the lower end frame 94 are formed of a metal or an alloy such as a cold rolled steel plate.

The printed circuit board 21 is attached to one end face frame 92 of the pair of end face frames 92. A voltage detection circuit 20 and a communication circuit 24 are mounted on the printed circuit board 21. The voltage detection circuit 20 detects the terminal voltage of each battery cell 10. The communication circuit 24 transmits the terminal voltage of each battery cell 10 detected by the voltage detection circuit 20 to the outside of the battery module 100 (such as a battery ECU 101 and a main control unit 300 in FIG. 21 described later). Details of the voltage detection circuit 20 and the communication circuit 24 will be described later.

Battery block 10BB has an upper surface parallel to the XY plane. Battery block 10BB has one end face and the other end face parallel to the YZ plane. Furthermore, the battery block 10BB has one side surface parallel to the XZ plane and the other side surface.

Each battery cell 10 has a gas vent valve 10v in the center of the upper surface portion. When the pressure inside the battery cell 10 rises to a predetermined value, the gas inside the battery cell 10 is discharged from the gas vent valve 10v of the battery cell 10. Thereby, the excessive raise of the pressure inside the battery cell 10 is prevented.

Each battery cell 10 has a plus electrode 10a and a minus electrode 10b on the top surface so as to be arranged in the Y direction. As shown in FIG. 3, each

electrode

10a, 10b is inclined and provided so as to protrude upward. In the following description, the battery cells 10 adjacent to one end face frame 92 to the battery cells 10 adjacent to the other end face frame 92 are referred to as first to eighteenth battery cells 10.

As shown in FIG. 2, in the battery module 100, each battery cell 10 is arranged so that the positional relationship between the plus electrode 10 a and the minus electrode 10 b in the Y direction is reversed between each two adjacent battery cells 10. The

Thereby, in the vicinity of one side surface of the battery block 10BB, the positive electrodes 10a and the negative electrodes 10b of the two adjacent battery cells 10 are alternately arranged in the X direction. Further, in the vicinity of the other side surface of the battery block 10BB, the minus electrodes 10b and the plus electrodes 10a of the two adjacent battery cells 10 are alternately arranged in the X direction.

Thus, in this battery module 100, one

electrode

10a, 10b of the plurality of battery cells 10 constitutes the first terminal row TL1 (FIG. 2) aligned in the X direction, and the plurality of battery cells 10 The

other electrode

10a, 10b constitutes a second terminal row TL2 (FIG. 2) in which the

other electrodes

10a, 10b are aligned in the X direction. The first terminal row TL1 and the second terminal row TL2 are arranged in parallel to each other with an interval therebetween.

The bus bar 40 is attached to each of the two

electrodes

10a and 10b adjacent in the X direction. Thereby, the some battery cell 10 is connected in series. Specifically, a common bus bar 40 is attached to the negative electrode 10 b of the first battery cell 10 and the positive electrode 10 a of the second battery cell 10. A common bus bar 40 is attached to the negative electrode 10b of the second battery cell 10 and the positive electrode 10a of the third battery cell 10. Similarly, a common bus bar 40 is attached to the minus electrode 10b of each odd-numbered battery cell 10 and the plus electrode 10a of the even-numbered battery cell 10 adjacent thereto. A common bus bar 40 is attached to the minus electrode 10b of each even-numbered battery cell 10 and the plus electrode 10a of the odd-numbered battery cell 10 adjacent thereto.

The bus bar 40a is attached to the plus electrode 10a of the first battery cell 10 and the minus electrode 10b of the 18th battery cell 10, respectively.

In addition, the bus bar 40 attached to each two

adjacent electrodes

10a and 10b has a substantially rectangular shape. The bus bar 40 has a pair of electrode connection holes arranged in the longitudinal direction. The bus bar 40a attached to one

electrode

10a, 10b has a substantially square shape. One electrode connection hole is formed in the bus bar 40a. These bus bars 40, 40a have a structure in which, for example, nickel plating is applied to the surface of tough pitch copper.

A male screw is formed on the positive electrode 10a and the negative electrode 10b of each battery cell 10. When the bus bar 40 is attached to the adjacent plus electrode 10a and minus electrode 10b, the plus electrode 10a and minus electrode 10b are fitted into the electrode connection holes formed in each bus bar 40. In this state, a nut (not shown) is attached to the male threads of the plus electrode 10a and the minus electrode 10b.

The positive electrode 10a of the first battery cell 10 adjacent to one end face frame 92 is the positive electrode 10a having the highest potential in the battery module 100. One end of a relay member 41 having a substantially L shape is attached to the plus electrode 10 a of the first battery cell 10.

The minus electrode 10b of the 18th battery cell 10 adjacent to the other end face frame 92 is the minus electrode 10b having the lowest potential in the battery module 100. One end of a relay member 41 having a substantially L shape is also attached to the negative electrode 10b of the eighteenth battery cell 10.

A plurality (three in this example) of

screw holes

99a, 99b, and 99c are formed in the upper surface portions of the pair of end face frames 92 so as to be aligned in the Y direction. In the Y direction, the

screw holes

99a, 99b, and 99c are located between the first terminal row TL1 and the second terminal row TL2.

In one end face frame 92, the other end portion of the relay member 41 connected to the plus electrode 10a of the first battery cell 10 is disposed on the screw hole 99c (FIG. 2) closest to the second terminal row TL2. The Similarly, in the other end face frame 92, the other end portion of the relay member 41 connected to the negative electrode 10b of the 18th battery cell 10 on the screw hole 99a (FIG. 2) closest to the second terminal row TL2. Is placed.

Each relay member 41 has, for example, a structure in which nickel plating is applied to the surface of tough pitch copper, similarly to the bus bars 40 and 40a. A power supply line 501 (see FIG. 7 to be described later) for supplying the power of the plurality of battery cells 10 to an external device (for example, a load such as a motor) is connected to the other end portion of these relay members 41. Details of the end face frame 92 and the relay member 41 will be described later.

On the upper surface of the battery block 10BB, a long flexible printed circuit board (hereinafter, referred to as “X”) extends in the X direction between one side surface of the battery block 10BB and the first terminal row TL1 located in the vicinity of the one side surface. 50 (abbreviated as FPC board). The FPC board 50 is connected to the plurality of bus bars 40.

Similarly, on the upper surface of the battery block 10BB, a long FPC board 50 is disposed so as to extend in the X direction between the other side surface of the battery block 10BB and the second terminal row TL2 located in the vicinity of the other side surface. Is done. The FPC board 50 is connected to the plurality of bus bars 40, 40a.

These FPC boards 50 have a configuration in which a plurality of conductor wires 51 and 52 (see FIG. 4 described later) are formed on an insulating layer, and have flexibility and flexibility. For example, polyimide is used as the material of the insulating layer constituting the FPC board 50, and copper is used as the material of the conductor wires 51 and 52 (see FIG. 4 described later). On the FPC board 50, a plurality of PTC (Positive Temperature Coefficient) elements 60 are arranged so as to be close to the plurality of

bus bars

40 and 40a, respectively. Details of the PTC element 60 will be described later.

Each FPC board 50 is folded at a right angle toward the inside in the vicinity of the upper end portion of one end face frame 92 (the end face frame 92 to which the printed circuit board 21 is attached), and is further folded downward to form the printed circuit board 21. Connected.

Thereby, the voltage detection circuit 20 mounted on the printed circuit board 21 is electrically connected to all the bus bars 40, 40a of the battery module 100 via the

conductor wires

51, 52 and the PTC element 60.

Details of the connection between the plurality of

bus bars

40 and 40a and the printed circuit board 21 will be described. FIG. 4 is a schematic plan view for explaining the details of the connection between the bus bars 40, 40 a and the printed circuit board 21.

As shown in FIG. 4, the printed circuit board 21 is provided with a voltage detection circuit 20. The FPC board 50 is provided with a plurality of

conductor lines

51 and 52 so as to correspond to the plurality of

bus bars

40 and 40a. Each conductor line 51 is provided so as to extend in parallel to the Y direction between the bus bars 40, 40a and the PTC element 60 disposed in the vicinity of the bus bar 40, and each conductor line 52 includes the PTC element 60 and the FPC board. 50 is provided so as to extend in parallel with the X direction.

One end of each conductor wire 51 is provided so as to be exposed on the lower surface side of the FPC board 50. One end of each conductor wire 51 exposed on the lower surface side is electrically connected to each

bus bar

40, 40a by, for example, soldering or welding. Thereby, the FPC board 50 is fixed to each

bus bar

40, 40a.

The other end of each conductor line 51 and one end of each conductor line 52 are provided so as to be exposed on the upper surface side of the FPC board 50. A pair of terminals (not shown) of the PTC element 60 are connected to the other end of each conductor wire 51 and one end of each conductor wire 52 by, for example, soldering.

The printed circuit board 21 is provided with a plurality of connection terminals 22 corresponding to the plurality of conductor lines 52 of the FPC board 50. The plurality of connection terminals 22 and the voltage detection circuit 20 are electrically connected on the printed circuit board 21 via a plurality of conductor lines (not shown). The other end of each conductor wire 52 of the FPC board 50 is connected to the corresponding connection terminal 22 by, for example, soldering or welding. In this way, each

bus bar

40, 40 a is electrically connected to the voltage detection circuit 20 via the PTC element 60. Thereby, the terminal voltage of each battery cell 10 is detected by the voltage detection circuit 20.

The voltage detection circuit 20 and the communication circuit 24 are electrically connected on the printed circuit board 21 via a plurality of conductor lines (not shown). Thereby, the terminal voltage of each battery cell 10 detected by the voltage detection circuit 20 is transmitted to the outside of the battery module 100 (battery ECU 101 and main control unit 300 in FIG. 21 to be described later) via the communication circuit 24.

Here, the PTC element 60 has a resistance temperature characteristic in which the resistance value rapidly increases when the temperature exceeds a certain value. Therefore, when a short circuit occurs in the voltage detection circuit 20 or the conductor wire 52, the temperature of the PTC element 60 increases due to the current flowing through the short circuit path. In this case, the resistance value of the PTC element 60 is increased. This prevents a large current from flowing through the short circuit path including the PTC element 60.

(2) Details of End Face Frame and Relay Member The pair of end face frames 92 in FIGS. 1 to 3 each have one surface and another surface parallel to the YZ direction. The printed circuit board 21 is attached to one surface of one end face frame 92. FIG. 5 is a plan view of one surface side of the end face frame 92 of FIGS.

The end face frame 92 includes a holding plate 92a, an upper protruding edge 92b, a lower protruding edge 92c, and a board mounting portion 92d. The holding plate 92a has a rectangular shape and has one surface and the other surface. In battery block 10BB, the other surface of holding plate 92a is in contact with battery cell 10.

The upper protrusion 92b is formed to extend in the Y direction along the upper end on one surface of the holding plate 92a. Both ends of the upper protruding edge 92b are formed in a U-shape that opens outward. Thereby, concave portions 92u for connection of the upper end frame 93 are formed at both ends of the upper protruding edge 92b. A connection hole 92e is formed in the recess 92u.

The lower projecting edge 92c is formed to extend in the Y direction along the lower end on one surface of the holding plate 92a. Both ends of the lower projecting edge 92c are formed in a U-shape that opens outward. Thereby, concave portions 92u for connection of the lower end frame 94 are formed on both sides of the lower protruding edge 92c. A connection hole 92e is formed in the recess 92u.

On one surface of the holding plate 92a, substrate attachment portions 92d are respectively formed at the lower portions of both end portions of the upper protruding edge 92b and at the upper portions of both end portions of the lower protruding edge 92c. A screw hole NH for attaching the printed circuit board 21 is formed in each board attaching portion 92b. In addition, the height of each board attachment portion 92d from one surface of the holding plate 92a in the X direction is smaller than the height of the upper protruding edge 92b and the lower protruding edge 92c from one surface of the holding plate 92a.

Three holes are formed in the center of the upper surface of the upper protrusion 92b so as to be aligned in the Y direction, and screw

members

991, 992, and 993 made of an insulating resin are fitted in these holes, respectively.

Screw holes

99a, 99b, and 99c are formed in the

screw members

991, 992, and 993, respectively. The

screw members

991, 992, 993 may be resin nuts.

In the Y direction, notches 92g are formed between one end of the upper protruding edge 92b and the screw hole 99a and between the other end of the upper protruding edge 92b and the screw hole 99c, respectively. The two notches 92g vertically penetrate the upper protruding edge 92b (see FIG. 2).

A part of the two FPC boards 50 that connect the plurality of bus bars 40, 40a and the printed circuit board 21 are disposed in the notches 92g (see FIGS. 1 to 3). This prevents the two FPC boards 50 from being shifted in the Y direction. In addition, since the two FPC boards 50 can be easily positioned on the battery block 10BB when the battery module 100 is assembled, the assembling work of the battery module 100 is facilitated.

Further, since the two FPC boards 50 are arranged in the notch 92g, when the upper protruding edge 92b comes into contact with another member, the two FPC boards 50 are connected to the end face frame 92 and the other members. It is prevented from being pinched by. This prevents the two FPC boards 50 from being damaged.

6 and 7 are external perspective views showing a procedure for attaching the relay member 41 to the battery block 10BB. 6 and 7 mainly show one end face frame 92 to which the printed circuit board 21 is attached and its peripheral portion.

As shown in FIG. 6,

connection holes

41a and 41b are formed in one end and the other end of the relay member 41, respectively. The plus electrode 10 a of the first battery cell 10 is fitted into the connection hole 41 a of the relay member 41. Thereby, the one end part of the relay member 41 overlaps with the bus bar 40a. Further, the other end of the relay member 41 is disposed on the upper surface of the upper protruding edge 92b of the end face frame 92 so that the connection hole 41b of the relay member 41 overlaps the screw hole 99c.

As shown in FIG. 7, an annular connection portion 501a is provided at one end of a power supply line 501 for connecting the battery module 100 and an external device (for example, a load such as a motor). In a state where the other end portion of the relay member 41 is disposed on the upper protruding edge 92b of the end face frame 92, the screw N1 passes through the connection portion 501a of the power supply line 501 and the connection hole 41b of the relay member 41, and the screw hole 99c of the end face frame 92. Screwed into. As a result, the other end of the relay member 41 and the power supply line 501 are fixed to the upper surface of the upper protruding edge 92 b of the end face frame 92. Thereby, the bus bar 40a and the power supply line 501 are connected to each other via the relay member 41. In this case, in one end face frame 92, a relay for supplying electric power of the plurality of battery cells 10 to an external device (for example, a load such as a motor) by the screw member 993 formed with the screw hole 99c and the screw N1. A terminal CT (see FIG. 3) is configured.

As described above, the relay member 41 is attached to the

screw members

991, 992, and 993 made of an insulating material. Therefore, the relay member 41 and the power supply line 501 are insulated from the end face frame 92 in a state where the relay member 41 and the power supply line 501 are attached to the end face frame 92.

In the above description, the example in which the relay member 41 is attached to one end face frame 92 of the pair of end face frames 92 constituting the battery block 10BB has been described, but the relay member 41 is similarly attached to the other end face frame 92. The printed circuit board 21 is not attached to the other end face frame 92. In the other end face frame 92, the other end of the relay member 41 is fixed on the screw hole 99a among the three

screw holes

99a, 99b, 99c. In this case, in the other end face frame 92, the relay for supplying the electric power of the plurality of battery cells 10 to an external device (for example, a load such as a motor) by the screw member 991 having the screw hole 99a and the screw N1. A terminal CT (see FIG. 3) is configured.

FIG. 8 is an external perspective view for explaining the attachment of the gas duct to the battery block 10BB. As shown in FIG. 8, in the battery module 100 according to the present embodiment, a gas duct GD extending in the X direction is provided. The gas duct GD has a concave cross section. The gas duct GD is arranged so that the opening faces downward.

A protruding piece GDx is formed at one end of the gas duct GD. A through hole GDy is formed in the protruding piece GDx. A gas duct GD is arranged on the upper surface of the battery block 10BB so that the through hole GDy of the protruding piece GDx overlaps the screw hole 99b of the end face frame 92 and covers the gas vent valves 10v of all the battery cells 10. In this state, the screw N2 is screwed into the screw hole 99b of the end face frame 92 through the through hole GDy of the protruding piece GDx. Thereby, gas duct GD is fixed to the upper surface of battery block 10BB.

Thus, by attaching the gas duct GD to the upper surface of the battery block 10BB, the gas discharged from the gas vent valves 10v of the plurality of battery cells 10 is guided to the outside without diffusing through the inside of the gas duct GD (FIG. 8). (See the thick dotted arrow).

(3) Configuration and Operation of Voltage Detection Circuit and Communication Circuit FIG. 9 is a block diagram for explaining the configuration and operation of the voltage detection circuit 20 and the communication circuit 24 mounted on the printed circuit board 21. The voltage detection circuit 20 includes a multiplexer 20a, an A / D (analog / digital) converter 20b, and a plurality of differential amplifiers 20c.

Each differential amplifier 20c of the voltage detection circuit 20 has two input terminals and one output terminal. Each differential amplifier 20c differentially amplifies the voltage input to the two input terminals, and outputs the amplified voltage from the output terminal. The two input terminals of each differential amplifier 20c are electrically connected to the plus electrode and the minus electrode of each battery cell 10 through the conductor line 51, the PTC element 60, and the conductor line 52, respectively.

The voltage between the positive electrode and the negative electrode of each battery cell 10 is differentially amplified by each differential amplifier 20c. The output voltage of each differential amplifier 20 c corresponds to the terminal voltage of each battery cell 10. Terminal voltages output from the plurality of differential amplifiers 20c are applied to the multiplexer 20a. The multiplexer 20a sequentially outputs the terminal voltages supplied from the plurality of differential amplifiers 20c to the A / D converter 20b. The A / D converter 20 b converts the terminal voltage output from the multiplexer 20 a into a digital value and supplies the digital value to the communication circuit 24. As described above, the terminal voltage applied to the communication circuit 24 is transmitted to the outside of the battery module 100 (battery ECU 101 and main control unit 300 in FIG. 21 described later).

The voltage detection circuit 20 is made of, for example, an ASIC (Application Specific Integrated Circuit). The communication circuit 24 is realized by hardware such as a CPU (Central Processing Unit) and a memory, and software such as a computer program. In this case, the function of the communication circuit 24 is realized by the CPU executing the computer program stored in the memory. The communication circuit 24 may be configured by hardware such as an ASIC.

(4) Effects of the first embodiment (4-1)
One end of the relay member 41 is connected to the positive electrode 10 a of the battery cell 10 adjacent to one end face frame 92, and the other end of the relay member 41 is disposed on the screw hole 99 c of the one end face frame 92. In this state, the other end of the relay member 41 and the power line 501 are connected using the screw N1. In one end face frame 92, the FPC board 50 including the plurality of

conductor wires

51 and 52 is disposed so as not to overlap the screw member 993 in which the screw holes 99c are formed. Thereby, the power supply line 501 for connecting the battery module 100 and the load can be easily connected to the other end portion of the relay member 41 on the screw hole 99c of the one end face frame 92.

Similarly, in the other end face frame 92, the FPC board 50 including the plurality of

conductor wires

51 and 52 is disposed so as not to overlap the screw member 991 in which the screw hole 99a is formed. Thereby, the power supply line 501 for connecting the battery module 100 and the load can be easily connected to the other end portion of the relay member 41 on the screw hole 99a of the other end face frame 92.

From these, the wiring structure of the battery module 100 becomes simple and the wiring work becomes easy.

Furthermore, the relay member 41 is disposed so as not to overlap the FPC board 50 including the plurality of

conductor wires

51 and 52. Thereby, the plurality of

conductor wires

51 and 52 and the relay member 41 do not interfere with each other. Therefore, the wiring structure of the battery module 100 becomes simpler and the wiring work becomes easier.

Further, since the plurality of

conductor wires

51 and 52 and the relay member 41 do not contact with each other, a short circuit between the plurality of

conductor wires

51 and 52 and the relay member 41 is prevented, and vibration caused by traveling of the electric vehicle described later is caused. The plurality of

conductor lines

51 and 52 are prevented from being disconnected. Thereby, the reliability of the battery module 100 is improved.

In the present embodiment, the relay member 41 having a substantially L shape is used so that the relay member 41 and the FPC board 50 do not overlap each other. However, the relay member 41 may have another shape such as a U shape or a V shape as long as it does not overlap the FPC board 50.

(4-2)
One end face frame 92 has a pair of notches 92g. Part of the FPC board 50 is disposed in each of the pair of notches 92g. Thereby, the FPC board 50 is smoothly guided to the printed circuit board 21 from the upper surface of the battery block 10BB. Thereby, the wiring work between the plurality of

electrodes

10a, 10b of the plurality of battery cells 10 and the printed circuit board 21 is further facilitated.

(4-3)
On the upper surface of the battery block 10BB, a pair of FPC boards 50 extend in the X direction outside the first terminal row TL1 and the second terminal row TL2. In this case, since the other end portion of the relay member 41 is disposed on the screw hole 99c between the pair of notches 92g, the FPC board 50 and the relay member 41 are reliably prevented from overlapping each other.

(4-4)
In the present embodiment, the X direction is an example of the first direction, the first battery cell 10 is an example of a battery cell located at one end, and one end face frame 92 is an example of a holding member. . Further, the positive electrodes 10a and the negative electrodes 10b of the plurality of battery cells 10 are examples of a plurality of power supply terminals, and the plurality of

conductor lines

51 and 52 formed on the two FPC boards 50 are examples of wirings. The member 41 is an example of a first connecting member. Further, the two notches 92g are examples of the guide portion, the upper surface of the battery block 10BB is an example of one surface of the battery block, and the plurality of

conductor wires

51 and 52 formed on one FPC board 50 are the first ones. It is an example of a wiring group, and the plurality of

conductor lines

51 and 52 formed on the other FPC board 50 are examples of the second wiring group, and the Y direction is an example of the second direction. Furthermore, one notch 92g is an example of a first guide part, and the other notch 92g is an example of a second guide part.

A battery module according to an embodiment of the present invention includes a battery block including a plurality of battery cells, a voltage detection circuit that detects the voltage of each battery cell, a holding member that holds the voltage detection circuit, and a holding member. A relay terminal electrically connected to any one of the electrode terminals of the plurality of battery cells, and a plurality of wires connecting the plurality of electrode terminals of the plurality of battery cells and the voltage detection circuit, The plurality of wirings are arranged so as not to overlap each other on the holding member.

In the battery module, the voltage detection circuit is held by the holding member. The plurality of electrode terminals of the plurality of battery cells and the voltage detection circuit are connected by a plurality of wires. Thereby, the terminal voltage of the plurality of battery cells is detected by the voltage detection circuit.

A relay terminal provided on the holding member is electrically connected to one of the electrode terminals of the plurality of battery cells. Thereby, the power supply line for connecting a battery module and an external device can be connected to a relay terminal. In this case, since the relay terminal and the plurality of wires are arranged on the holding member so as not to overlap each other, the relay terminal and the power supply line connected to the relay terminal do not interfere with the plurality of wires. Therefore, the wiring structure is simplified and wiring work is facilitated.

The plurality of battery cells are arranged to be aligned in the first direction, and the holding member is provided adjacent to the battery cell located at one end of the plurality of battery cells, and the battery cell located at the one end is arranged. The electrode terminal and the relay terminal are connected via the first connection member, and the first connection member and the plurality of wires are arranged so as not to overlap each other.

In the battery module, a holding member for holding the voltage detection circuit is provided so as to be adjacent to the battery cell located at one end. Since the 1st connection member which connects the electrode terminal of the battery cell and relay terminal which are located in one end part does not overlap with a plurality of wirings, the 1st connection member and a plurality of wirings do not interfere. Therefore, the wiring structure becomes simpler and the wiring work becomes easier.

The battery module has a guide unit that guides a plurality of wires from a plurality of electrode terminals of a plurality of battery cells to a voltage detection circuit.

In this case, in the battery module, the guide unit guides the plurality of wires from the plurality of electrode terminals of the plurality of battery cells to the voltage detection circuit. This further facilitates the wiring work between the plurality of electrode terminals of the plurality of battery cells and the voltage detection circuit.

The battery block has one surface on which a plurality of electrode terminals of a plurality of battery cells are arranged, and the plurality of electrode terminals of the plurality of battery cells are arranged in parallel with each other along a first direction on the one surface. The second terminal row includes a plurality of wirings including first and second wiring groups extending in the first direction on the outer surface of the first and second terminal rows on the one surface. A first guide portion and a second guide portion which are provided so as to be arranged in a second direction intersecting with the first direction and respectively guide the first and second wiring groups, and the relay terminal includes the first guide portion and the first guide portion. It is provided between the second guide part.

On the one surface of the battery block, the first and second wiring groups extend in the first direction outside the first and second terminal rows. The first and second wiring groups are guided to the voltage detection circuit from the plurality of electrode terminals of the plurality of battery cells by the first and second guide portions, respectively. In this case, since the relay terminal is provided between the first guide portion and the second guide portion, the relay terminal and the plurality of wires are reliably prevented from overlapping each other on the holding member.

[2] Second Embodiment A battery module according to a second embodiment will be described while referring to differences from the battery module 100 according to the first embodiment.

(1) Structure of Battery Module FIG. 10 is an external perspective view showing the battery module 100 according to the second embodiment, and FIG. 11 is a plan view of the battery module 100. In FIG. 11, illustration of the plurality of PTC elements 60 is omitted.

Also in the battery module 100 according to the present embodiment, the plurality of battery cells 10, the pair of end face frames 92, the pair of upper end frames 93, and the pair of lower end frames 94 constitute a substantially rectangular parallelepiped battery block 10BB. In the present embodiment, each end face frame 92 is made of a rectangular plate member having one surface and the other surface.

In the battery block 10BB, the other surface of the end face frame 92 is in contact with the battery cell 10. The printed circuit board 21 is provided on one surface of the end face frame 92. The end face frame 92, the upper end frame 93, and the lower end frame 94 used in the present embodiment are formed of an insulating resin.

Each battery cell 10 has a plus electrode 10a and a minus electrode 10b on the top surface so as to be arranged in the Y direction. Also in this battery module 100, one

electrode

10a, 10b of the plurality of battery cells 10 constitutes a first terminal row TL1 aligned in the X direction, and the

other electrode

10a, 10b of the plurality of battery cells 10 is X A second terminal row TL2 aligned in the direction is configured. The first terminal row TL1 and the second terminal row TL2 are arranged in parallel to each other with an interval therebetween.

Two

adjacent electrodes

10a and 10b are fitted into a flat bus bar 40p. In this state, the

electrodes

10a and 10b are laser welded to the bus bar 40p. Accordingly, the plurality of bus bars 40p are arranged along the first terminal row TL1 and the second terminal row TL2, and the plurality of battery cells 10 are connected in series.

Each bus bar 40p is provided with an attachment piece 42p (FIG. 11) for connecting the bus bar 40p to

FPC boards

50a and 50b described later. With a plurality of battery cells 10 connected in series, a plurality of attachment pieces 42p are provided from a plurality of bus bars 40p arranged along the first terminal row TL1 toward the gas vent valves 10v of the plurality of battery cells 10. Projects a certain length in the Y direction. Similarly, a plurality of attachment pieces 42p project from the plurality of bus bars 40p arranged along the second terminal row TL2 toward the gas vent valves 10v of the plurality of battery cells 10 by a certain length in the Y direction.

On the upper surface of the battery block 10BB, as shown in FIGS. 10 and 11, two insulating rib members GL1, extending in the X direction between the first terminal row TL1 and the second terminal row TL2, are provided. GL2 is provided. In the Y direction, the two rib members GL1 and GL2 are arranged so as to sandwich the gas vent valves 10v of the plurality of battery cells 10, and partition the space immediately above the battery block 10BB into three regions along the Y direction. .

In the X direction, one end portion of each rib member GL1, GL2 is located on the upper surface of one end surface frame 92, and the other end portion of each rib member GL1, GL2 is located on the upper surface of the other end surface frame 92.

As the rib members GL1 and GL2, for example, rod-shaped members having a rectangular cross section can be used. In this case, the two rod-shaped members are attached to the upper surface of the battery block 10BB as adhesive members or the like as the rib members GL1 and GL2.

When a plurality of battery cells 10 and a plurality of spacers (not shown) are alternately arranged in the X direction in the battery block 10BB, each spacer protrudes above the battery block 10BB at a predetermined position in the Y direction. Two protrusions may be provided. Thereby, two protrusion row | line | columns along a X direction are formed in the upper surface of battery block 10BB. In this case, instead of the two rod-shaped members described above, two protrusion rows may constitute the rib members GL1 and GL2, respectively.

On the upper surface of the battery block 10BB, two

FPC boards

50a and 50b are arranged between the first terminal row TL1 and the second terminal row TL2. One FPC board 50a is disposed between the gas vent valves 10v of the plurality of battery cells 10 and the first terminal row TL1 so as not to overlap the gas vent valves 10v of the plurality of battery cells 10. One side portion of one FPC board 50a is connected in common to the plurality of attachment pieces 42p of the plurality of bus bars 40p provided in the first terminal row TL1. In this case, the width of the FPC board 50a is set to be equal to the interval between the rib member GL1 and the plurality of bus bars 40p provided in the first terminal row TL1 in advance. Accordingly, the FPC board 50a can be easily positioned in the Y direction by the mounting pieces 42p of the plurality of bus bars 40p provided on the rib member GL1 and the first terminal row TL1.

Similarly, the other FPC board 50b is disposed between the gas vent valves 10v of the plurality of battery cells 10 and the second terminal row TL2 so as not to overlap the gas vent valves 10v of the plurality of battery cells 10. . One side portion of the other FPC board 50b is connected in common to the plurality of attachment pieces 42p of the bus bar 40p provided in the second terminal row TL2. In this case, the width of the FPC board 50b is set to be equal to the interval between the rib member GL2 and the plurality of bus bars 40p provided in the second terminal row TL2 in advance. Accordingly, the FPC board 50b can be easily positioned in the Y direction by the mounting pieces 42p of the plurality of bus bars 40p provided on the rib member GL2 and the second terminal row TL2.

A protective member 95 having a pair of side surface portions and a bottom surface portion is attached to the end surface frame 92 so as to protect both end portions and the lower portion of the printed circuit board 21. The two

FPC boards

50 a and 50 b are folded downward at the upper end portion of the protection member 95 and connected to the printed circuit board 21.

The printed circuit board 21 is protected by being covered with a protective member 95. Also in the present embodiment, the voltage detection circuit 20 and the communication circuit 24 are mounted on the printed circuit board 21. Note that the protection member 95 may not be attached to the end face frame 92.

A cooling plate 96 is provided in contact with the lower surfaces of the plurality of battery cells 10. The cooling plate 96 has a refrigerant inlet 96a and a refrigerant outlet 96b. Inside the cooling plate 96, a circulation path connected to the refrigerant inlet 96a and the refrigerant outlet 96b is formed. When a coolant such as cooling water flows into the coolant inlet 96a, the coolant passes through the circulation path inside the cooling plate 96 and flows out from the coolant outlet 96b. Thereby, the cooling plate 96 is cooled. As a result, the plurality of battery cells 10 are cooled.

Three holes are formed on the upper surfaces of the pair of end face frames 92 so as to be aligned in the Y direction, and screw members made of insulating resin or metal are fitted into these holes, respectively.

Screw holes

99a, 99b, and 99c are formed in the three screw members, respectively. The screw member may be a resin or metal nut.

In one end face frame 92 to which the protection member 95 is attached, the screw hole 99a is located on the extension line of the first terminal row TL1 in the X direction, and the screw hole 99b is located in the center of the upper face of the end face frame 92 in the Y direction. The screw hole 99c is located on the extension line of the second terminal row TL2 in the X direction. In the other end face frame 92 to which the protective member 95 is not attached, the screw hole 99a is located on the extension line of the second terminal row TL2 in the X direction, and the screw hole 99b is located in the center of the upper face of the end face frame 92 in the Y direction. The screw hole 99c is located on the extension line of the first terminal row TL1 in the X direction.

On the upper surface of one end face frame 92 to which the protection member 95 is attached, one FPC board 50a and two

screw holes

99a and 99b in the Y direction and between the two

screw holes

99b and 99c in the Y direction, respectively. A part of the other FPC board 50b is arranged. On the upper surface of the other end face frame 92 to which the protective member 95 is not attached, the other FPC board 50b is provided between the two

screw holes

99a and 99b in the Y direction and between the two

screw holes

99b and 99c in the Y direction. And a part of one FPC board 50a is arranged.

(2) Connection of Power Supply Line FIG. 12 is an external perspective view for explaining the connection of the power supply line 501 to the battery module 100 according to the second embodiment.

The bus bar 40p has a substantially rectangular shape, similar to the bus bar 40 in the first embodiment. The bus bar 40p has a pair of electrode connection holes arranged in the longitudinal direction.

The positive electrode 10a of the battery cell 10 adjacent to one end face frame 92 to which the protective member 95 is attached is fitted into one electrode connection hole of the bus bar 40p, and the other electrode of the bus bar 40p is over the screw hole 99c of the end face frame 92. With the connection holes overlapping, the plus electrode 10a is laser welded to the bus bar 40p.

In this state, as shown in FIG. 12, the screw N1 is screwed into the screw hole 99c of the end face frame 92 through the annular connection portion 501a of the power line 501 and the other electrode connection hole of the bus bar 40p. Thereby, the bus bar 40p and the power supply line 501 are connected to each other. In this case, in one end face frame 92, a relay terminal for supplying electric power of the plurality of battery cells 10 to an external device (for example, a load such as a motor) by the screw member having the screw hole 99c and the screw N1. CT is configured. At this time, the attachment piece 42p of the bus bar 40p connected to the relay terminal CT is located on the upper surface of the one end face frame 92 in the X direction.

In this way, the relay terminal CT in one end face frame 92 is provided outside the rib member GL2 and the mounting piece 42p of the bus bar 40p. In this case, the other FPC board 50b is positioned in the Y direction by the rib member GL2 and the mounting pieces 42p of the plurality of bus bars 40p provided in the second terminal row TL2, so that the FPC board 50b is connected to the relay terminal CT. Is reliably prevented. Thereby, the attachment operation | work of the screw N1 to the screw hole 99c can be performed easily and reliably. In particular, in this example, the rib member GL2 for positioning the FPC board 50b and the mounting piece 42p of the bus bar 40p are provided on the upper surface of one end face frame 92 as described above. Therefore, the FPC board 50b is more reliably prevented from overlapping the relay terminal CT. Thus, it is preferable that the rib member GL2 that guides the printed circuit board 21 while positioning the FPC board 50b and the mounting piece 42p of the bus bar 40p are provided on the upper surface of the end face frame 92.

In the above, the example in which the power line 501 is connected to the bus bar 40p in one end face frame 92 of the pair of end face frames 92 constituting the battery block 10BB has been described, but the power line 501 is similarly applied to the other end face frame 92. Is connected to the bus bar 40p. In the other end face frame 92, the bus bar 40p laser-welded to the negative electrode 10b of the battery cell 10 adjacent to the other end face frame 92 on the screw hole 99a of the three

screw holes

99a, 99b, 99c. A power line 501 is connected. Therefore, in the other end face frame 92, the relay terminal CT for supplying the power of the plurality of battery cells 10 to an external device (for example, a load such as a motor) by the screw member having the screw hole 99a and the screw N1. (See FIG. 11). At this time, the attachment piece 42p of the bus bar 40p connected to the relay terminal CT is also located on the upper surface of the other end face frame 92 in the X direction.

Thus, the relay terminal CT in the other end face frame 92 is provided outside the rib member GL2 and the mounting piece 42p of the bus bar 40p. In this case, the other FPC board 50b is positioned in the Y direction by the rib member GL2 and the mounting pieces 42p of the plurality of bus bars 40p provided in the second terminal row TL2, so that the FPC board 50b is connected to the relay terminal CT. Is reliably prevented. Thereby, the attachment operation | work of the screw N1 to the screw hole 99a can be performed easily and reliably. In particular, in this example, the rib member GL2 for positioning the FPC board 50b and the mounting piece 42p of the bus bar 40p are provided on the upper surface of the other end face frame 92 as described above. Therefore, the FPC board 50b is more reliably prevented from overlapping the relay terminal CT. Thus, it is preferable that the rib member GL2 that guides the printed circuit board 21 while positioning the FPC board 50b and the mounting piece 42p of the bus bar 40p are provided on the upper surface of the end face frame 92.

(3) Effects of the second embodiment (3-1)
On the upper surface of the battery block 10BB, a pair of

FPC boards

50a and 50b extend in the X direction between the first terminal row TL1 and the second terminal row TL2. Further, a part of the bus bar 40p connected to the positive electrode 10a of the battery cell 10 adjacent to one end face frame 92 is disposed on the screw hole 99c on the extension line of the second terminal row TL2 in the X direction. This reliably prevents the pair of

FPC boards

50a and 50b and the bus bar 40p connected to the plus electrode 10a of the battery cell 10 adjacent to one end face frame 92 from overlapping each other.

(3-2)
In the present embodiment, the bus bar 40p connected to the positive electrode 10a of the battery cell 10 adjacent to one end face frame 92 of FIG. 10 is an example of the first connecting member. Also, the plurality of

conductor lines

51 and 52 formed on one FPC board 50a are examples of the first wiring group, and the plurality of

conductor lines

51 and 52 formed on the other FPC board 50b are the second wiring. It is an example of a group, and the Y direction is an example of the second direction.

Further, the plurality of mounting pieces 42p of the plurality of bus bars 40p arranged along the rib member GL1 and the first terminal row TL1 is an example of the first guide portion, and the rib member GL2 and the second terminal row TL2 The plurality of attachment pieces 42p of the plurality of bus bars 40p arranged along the line is an example of the second guide portion.

The battery block has one surface on which a plurality of electrode terminals of a plurality of battery cells are arranged, and the plurality of electrode terminals of the plurality of battery cells are arranged in parallel with each other along a first direction on the one surface. The second terminal row includes a plurality of wirings including first and second wiring groups extending in the first direction on the inner side of the first and second terminal rows on one surface, and the guide portion includes The first and second guide portions are provided so as to be arranged in a second direction intersecting with the first direction and guide the first and second wiring groups, respectively, and the relay terminal includes the first and second relay terminals. Provided on one outer side of the guide.

On the one surface of the battery block, the first and second wiring groups extend in the first direction inside the first and second terminal rows. The first and second wiring groups are guided to the voltage detection circuit from the plurality of electrode terminals of the plurality of battery cells by the first and second guide portions, respectively. In this case, since the relay terminal is provided outside one of the first and second guide portions, it is reliably prevented that the relay terminal and the plurality of wires overlap each other on the holding member.

[3] Third Embodiment A battery module according to a third embodiment will be described while referring to differences from the battery module 100 according to the first embodiment.

(1) Structure of Battery Module FIG. 13 is an exploded perspective view of the battery module 100 according to the third embodiment. In the battery module 100 according to the present embodiment, the plurality of battery cells 10, the plurality of spacers SP, and the end face frame 92 constitute a substantially rectangular parallelepiped battery block 10BB. As shown in FIG. 13, the plurality of battery cells 10 and the plurality of spacers SP are arranged alternately in the X direction. An end face frame 92 is provided adjacent to the battery cell 10 located at one end in the X direction.

The spacer SP is made of a rectangular plate member. The end face frame 92 is made of a rectangular plate-like member having one surface and the other surface. In battery block 10BB, the other surface of end surface frame 92 is in contact with battery cell 10. The printed circuit board 21 is provided on one surface of the end face frame 92. The end face frame 92 and the spacer SP used in the present embodiment are formed of an insulating resin.

Two guide hooks g are provided at the upper end of each spacer SP so as to be aligned in the Y direction. Each guide hook g is composed of two key-like protrusions facing each other.

electrode

other electrode

A positive electrode 10a of a battery cell 10 located at one end (hereinafter referred to as one end side battery cell 10) and a negative electrode 10b of a battery cell 10 located at the other end (hereinafter referred to as other end side battery cell 10) Except for each, two

adjacent electrodes

10a and 10b are fitted into a flat bus bar 40q. In this state, the

electrodes

10a and 10b are laser welded to the bus bar 40q.

Further, a part of the flat bus bar 40q is fitted into the plus electrode 10a of the battery cell 10 at one end. In this state, the plus electrode 10a of the one end side battery cell 10 is laser-welded to the bus bar 40q. Thereby, the plurality of bus bars 40q are arranged along the first terminal row TL1 and the second terminal row TL2, and the plurality of battery cells 10 are connected in series.

A plurality of wirings 53 are provided corresponding to the plurality of bus bars 40q and the negative electrode 10b of the battery cell 10 at the other end. Each wiring 53 is composed of, for example, a conductor wire and a resin-coated tube that covers the conductor wire. A connection piece 53 t is attached to one end of each wiring 53. A connection piece 53t is connected to each of the plurality of bus bars 40q and the negative electrode 10b of the other end side battery cell 10 by laser welding.

Here, on the upper surface of the battery block 10BB, the two guide hooks g formed on the plurality of spacers SP are arranged between the first terminal row TL1 and the second terminal row TL2 in the first terminal row TL1. Located in the vicinity and in the vicinity of the second terminal row TL2.

The wiring 53 connected to the bus bar 40q of the first terminal row TL1 is held by a plurality of guide hooks g located in the vicinity of the first terminal row TL1. Thus, the plurality of wirings 53 are bundled by the plurality of guide hooks g and guided to the end face frame 92 so as to extend in the X direction in the vicinity of the first terminal row TL1.

On the other hand, the wiring 53 connected to the bus bar 40q of the second terminal row TL2 and the negative electrode 10b of the other end side battery cell 10 is held by a plurality of guide hooks g located in the vicinity of the second terminal row TL2. . Thus, the plurality of wirings 53 are bundled by the plurality of guide hooks g and guided to the end face frame 92 so as to extend in the X direction in the vicinity of the second terminal row TL2.

Hereinafter, the plurality of wirings 53 disposed so as to extend in the X direction in the vicinity of the first terminal row TL1 are referred to as a first wiring group 53x, and are disposed so as to extend in the X direction in the vicinity of the second terminal row TL2. The plurality of wirings 53 to be used are referred to as a second wiring group 53y.

Three holes are formed on the upper surface of the end face frame 92 so as to be aligned in the Y direction, and screw members made of insulating resin or metal are fitted into these holes, respectively.

Screw holes

In the end face frame 92, the screw hole 99a is located on the extension line of the first terminal row TL1 in the X direction, the screw hole 99b is located in the center of the upper surface of the end face frame 92 in the Y direction, and the screw hole 99c is the first hole in the X direction. It is located on the extension line of the second terminal row TL2.

The positive electrode 10a of the one end side battery cell 10 is fitted into one electrode connection hole of the bus bar 40q, and the other electrode connection hole of the bus bar 40q overlaps with the screw hole 99c of the end face frame 92. Laser welded. In this state, the screw N1 is screwed into the screw hole 99c of the end face frame 92 through the annular connection portion 501a of the power supply line 501 and the other electrode connection hole of the bus bar 40q. Thereby, bus bar 40q and power supply line 501 are connected to each other. In this case, in the end face frame 92, the relay terminal CT for supplying the power of the plurality of battery cells 10 to an external device (for example, a load such as a motor) is provided by the screw member in which the screw hole 99c is formed and the screw N1. Composed. One end of another power line 501 is connected to the negative electrode 10b of the other end side battery cell 10 by laser welding.

In the Y direction, guide hooks g are formed on the upper surface of the end face frame 92 between the screw holes 99a and 99b and between the screw holes 99b and 99c, respectively.

On the upper surface of the end face frame 92, a part of the first wiring group 53x is arranged in a guide hook g formed between the screw hole 99a and the screw hole 99b. In addition, a part of the second wiring group 53y is arranged in the guide hook g formed between the screw hole 99b and the screw hole 99c.

A connector 531 is provided at the other end of the first wiring group 53x. A connector 532 is also provided at the other end of the second wiring group 53y. Connectors 531 b and 532 b corresponding to the

connectors

531 and 532 are mounted on the printed circuit board 21 provided on the end face frame 92.

The connector 531 of the first wiring group 53x is connected to the connector 531b mounted on the printed circuit board 21, and the connector 532 of the second wiring group 53y is connected to the connector 532b mounted on the printed circuit board 21.

(2) Effects of the third embodiment (2-1)
On the upper surface of the battery block 10BB, a plurality of wirings 53 extend in the X direction between the first terminal row TL1 and the second terminal row TL2. Further, a part of the bus bar 40q connected to the plus electrode 10a of the battery cell 10 adjacent to the end face frame 92 is disposed on the screw hole 99c on the extension line of the second terminal row TL2 in the X direction.

The plurality of wirings 53 are held by a plurality of guide hooks g provided between the first terminal row TL1 and the second terminal row TL2. Thereby, the wiring work between the plurality of

electrodes

10a, 10b of the plurality of battery cells 10 and the printed circuit board 21 is further facilitated. In addition, the plurality of wirings 53 and the bus bar 40q connected to the plus electrode 10a of the battery cell 10 adjacent to the one end face frame 92 are reliably prevented from overlapping each other.

(2-2)
In the present embodiment, the end face frame 92 is an example of a holding member, and the bus bar 40q connected to the one end side battery cell 10 in FIG. 13 is an example of a first connecting member.

Further, the two guide hooks g formed on the end face frame 92 are examples of guide portions, and the upper surface of the battery block 10BB is an example of one surface of the battery block.

Furthermore, the Y direction is an example of the second direction, one guide hook g formed on the end face frame 92 is an example of the first guide portion, and the other guide hook g formed on the end face frame 92 is It is an example of the 2nd guide part.

[4] Fourth Embodiment A battery module according to a fourth embodiment will be described while referring to differences from the battery module 100 according to the first embodiment.

(1) Structure of Battery Module FIG. 14 is an exploded perspective view of the battery module according to the fourth embodiment. As shown in FIG. 14, the battery module 100 according to the present embodiment is arranged in a casing (housing) CA. The upper part of the casing CA is open. The battery module 100 further includes a gas duct GD and a lid member 80. The lid member 80 is made of an insulating material such as resin and has a rectangular plate shape.

In the battery module 100 of FIG. 14, the positive electrode 10a and the negative electrode 10b of each battery cell 10 are provided along the Z direction so as to protrude upward.

In the present embodiment, a bus bar 40x having a substantially L shape is attached to the plus electrode 10a of the first battery cell 10 and the minus electrode 10b of the 18th battery cell 10 instead of the bus bar 40a of FIGS. It is done.

An electrode connection hole 47x is formed at one end of the bus bar 40x. A power line connection hole 47y is formed at the other end of the bus bar 40x. The bus bar 40x has a configuration in which, for example, nickel plating is applied to the surface of tough pitch copper. The bus bar 40x is connected to the FPC board 50 together with the plurality of bus bars 40. Hereinafter, a member in which the FPC board 50 and the plurality of bus bars 40, 40x are integrally connected is referred to as a wiring member 70.

The battery block 10BB is provided with a gas duct GD, a wiring member 70, and a lid member 80. The wiring member 70 and the gas duct GD are attached to the lower surface of the lid member 80. Thereby, the gas duct GD, the wiring member 70, and the cover member 80 can be handled integrally. Battery block 10BB is housed in casing CA, and lid member 80 is fitted to casing CA so as to close the opening of casing CA. Thereby, the battery box BB that houses the battery module 100 is formed.

In this example, the lid member 80 is formed so as to cover the plurality of battery cells 10 between the upper protruding edges 92b of the pair of end face frames 92. When the lid member 80 is provided in the battery block 10BB, the upper surfaces of the upper protruding edges 92b of the pair of end surface frames 92 are exposed to the outside. In the wiring member 70, the other end of one bus bar 40x overlaps the upper protruding edge 92b of one end face frame 92, and the other end of the other bus bar 40x overlaps the upper protruding edge 92b of the other end face frame 92. Is provided on the battery block 10BB.

FIG. 15 is a perspective view of the lid member 80 of FIG. 14 as viewed obliquely from below. FIG. 16 is a perspective view of the lid member 80 of FIG. 14 as viewed obliquely from above. Hereinafter, the one side and the other side of the lid member 80 along the X direction are referred to as a side 80a and a side 80b, respectively. The side 80a of the lid member 80 is along the side E1 (FIG. 14) in one direction of the battery block 10BB (FIG. 14), and the side 80b of the lid 80 is on the side E2 (FIG. 14) in the other direction of the battery block 10BB. Along. Further, the surface of the lid member 80 facing the battery block 10BB is called a back surface, and the surface of the lid member 80 on the opposite side is called a front surface. In this example, the surface of the lid member 80 is directed upward.

As shown in FIG. 15, FPC fitting portions 84 are formed on the back surface of the lid member 80 so as to extend along the side sides 80a and the side sides 80b of the lid member 80, respectively. The FPC board 50 of the wiring member 70 is fitted into the FPC fitting portion 84. Hereinafter, the FPC fitting portion 84 provided along the side 80a and the side 80b of the lid member 80 is referred to as the FPC fitting 84 on the side 80a side and the FPC fitting 84 on the side 80b side, respectively. . A notch 84 S for drawing out the FPC board 50 fitted to the FPC fitting portion 84 to the outside of the lid member 80 is formed on one end side of the lid member 80. The cutout 84 S constitutes one end of the FPC fitting portion 84.

A plurality of

concave portions

81 and 82 are provided along the FPC fitting portions 84 on the side 80a side and the side 80b side. In this example, nine concave portions 81 are provided along the FPC fitting portion 84 on the side 80a side. One recess 82, eight recesses 81, and another one recess 82 are provided along the side 80 b of the lid member 80.

The

concave portions

81 and 82 have a substantially rectangular shape, and the length of the concave portion 81 in the X direction is larger than the length of the concave portion 82 in the X direction. On the other hand, the length of the recess 82 in the Y direction is larger than the length of the recess 81 in the Y direction. A part of the recess 82 extends toward the end side of the lid member 80 that intersects the side sides 80a and 80b.

The shape and length of the recess 81 are substantially equal to the shape and length of the bus bar 40, and the shape and length of the recess 82 are substantially equal to the shape and length of a part of the bus bar 40x (one end where the electrode connection hole 47x is formed). .

A plurality of openings 83 are formed so as to penetrate from the bottom surfaces of the plurality of

recesses

81 and 82 to the surface of the lid member 80 (FIG. 16). Two openings 83 (FIG. 16) are formed in each recess 81, and one opening 83 (FIG. 16) is formed in each recess 82. Hereinafter, the recess 81 and the opening 83 provided along the side 80a of the lid member 80 are referred to as the recess 81 on the side 80a and the opening 83 on the side 80a, respectively, and along the side 80b of the lid 80. The

recesses

81 and 82 and the opening 83 thus provided are referred to as the

recesses

81 and 82 on the side 80b side and the opening 83 on the side 80b side, respectively.

The bus bar 40 of the wiring member 70 is fitted into the recess 81 of the lid member 80, and a part of the bus bar 40 x of the wiring member 70 is fitted into the recess 82. In a state where the bus bar 40 is fitted in the recess 81, the electrode connection hole 43 of the bus bar 40 is exposed to the surface side of the lid member 80 in the opening 83. Similarly, the electrode connection hole 47 x of the bus bar 40 x is exposed to the surface side of the lid member 80 in the opening 83 in a state where a part of the bus bar 40 x is fitted in the recess 82.

A duct fitting portion 87 is formed so as to extend in the X direction between the plurality of recesses 81 on the side 80a side and the plurality of

recesses

81, 82 on the side 80b side. The gas duct GD is fitted in the duct fitting portion 87.

A plurality of pairs of connection grooves 85 are formed so as to extend from the plurality of recesses 81 on the side 80a side to the FPC fitting portion 84 on the side 80a side. A plurality of pairs of connection grooves 85 are formed so as to extend from the plurality of recesses 81 on the side 80b side to the FPC fitting portion 84 on the side 80b side. A plurality of connection grooves 86 are formed to extend from the plurality of recesses 82 on the side 80b side to the FPC fitting portion 84 on the side 80b side.

Each bus bar 40 is provided with a pair of attachment pieces 42 for connecting the bus bar 40 to the FPC board 50. Each bus bar 40x is provided with an attachment piece 46 for connecting the bus bar 40x to the FPC board 50. A pair of attachment pieces 42 of the plurality of bus bars 40 are respectively disposed in the plurality of pairs of connection grooves 85. In the plurality of connection grooves 86, the mounting pieces 46 of the plurality of bus bars 40x are respectively arranged.

The gas duct GD and the wiring member 70 are attached to the lid member 80 as described above. In this state, the lid member 80 is attached to the battery block 10BB. The plus electrodes 10a (FIG. 14) and the minus electrodes 10b (FIG. 14) of the plurality of battery cells 10 are fitted into the electrode connection holes 43 of the plurality of bus bars 40. The plus electrodes 10a or the minus electrodes 10b of the plurality of battery cells 10 are inserted into the electrode connection holes 47x of the plurality of bus bars 40x. The gas duct GD is disposed on the upper surface of the battery block 10BB so as to cover the gas vent valves 10v of the plurality of battery cells 10.

In each opening 83 (FIG. 16) of the lid member 80, a nut (not shown) is screwed into the male threads of the plus electrode 10a and the minus electrode 10b. Thereby, adjacent battery cells 10 are electrically connected via the bus bar 40. As a result, the plurality of battery cells 10 are connected in series. Further, a part of the two FPC boards 50 is drawn out from the notch 84S on one end side of the lid member 80. Each part of the FPC board 50 drawn out is folded at a right angle toward the inside in the vicinity of the upper end portion of one end face frame 92 (end face frame 92 to which the printed circuit board 21 is attached), and further folded downward. Connected to the printed circuit board 21. Thereby, the plurality of bus bars 40, 40x are connected to the voltage detection circuit 20 (FIG. 14) on the printed circuit board 21 via the FPC board 50.

At this time, the other end of one bus bar 40x overlaps with the upper protruding edge 92b of one end face frame 92, and the other end of the other bus bar 40x overlaps with the upper protruding edge 92b of the other end face frame 92.

In this state, the screw N1 is screwed into the screw hole 99c of the one end face frame 92 through the connection part 501a of the power supply line 501 and the power supply line connection hole 47y of the one bus bar 40x (FIG. 14). Thereby, the other end part of one bus-bar 40x and the power wire 501 are connected to the relay terminal CT (FIG. 3) comprised from the screw member 993 (FIG. 5) and the screw N1.

Similarly, the screw N1 is screwed into the screw hole 99a of the other end face frame 92 through the connection part 501a of the power supply line 501 and the power supply line connection hole 47y of the other bus bar 40x (FIG. 14). Thus, the other end of the other bus bar 40x and the power supply line 501 are connected to the relay terminal CT (FIG. 3) including the screw member 991 (FIG. 5) and the screw N1.

Thereafter, as described above, the battery block 10BB is housed in the casing CA, and the lid member 80 is fitted to the casing CA so as to close the opening of the casing CA.

At this time, the lid member 80 may be screwed to the casing CA after being fitted to the casing CA. Thereby, the lid member 80 is reliably fixed to the casing CA.

Alternatively, before the lid member 80 is fitted into the casing CA, an adhesive may be applied in advance to the both

sides

80a and 80b of the lid member 80 and the upper end sides of both sides along the X direction of the casing CA. In this case, when the lid member 80 is fitted into the casing CA, the both

sides

80a and 80b of the lid member 80 are joined to the upper end sides of both sides of the casing CA, and the lid member 80 is securely fixed to the casing CA. Is done.

(2) Effects of Fourth Embodiment Also in the present embodiment, two notches 92g (see FIG. 14) are formed on the upper protruding edge 92b of the end face frame 92. In this case, the two notches 92g function as a first guide part and a second guide part, respectively.

Thereby, in a state where the bus bar 40x is connected to the relay terminal CT (FIG. 3), the relay terminal CT, the bus bar 40x, and the FPC board 50 can be arranged on the end face frame 92 so as not to overlap each other. Therefore, the wiring structure of the battery module 100 is simplified and wiring work is facilitated.

As described above, in the present embodiment, two FPC boards 50 are fitted into the two FPC fitting portions 84 of the lid member 80, respectively. In this case, the two FPC boards 50 can be easily positioned with respect to the lid member 80. By attaching the lid member 80 to the battery block 10BB, the two FPC fitting portions 84 of the lid member 80 function as a first guide portion and a second guide portion, respectively. In the present embodiment, the two FPC boards 50 are connected to the plurality of

bus bars

40 and 40x in a state where the two FPC boards 50 are fitted into the two FPC fitting portions 84, respectively. In this case, the plurality of attachment pieces 42 of the plurality of bus bars 40 connected to the first terminal row TL1 function as a first guide portion. The plurality of mounting

pieces

42 and 46 of the plurality of

bus bars

40 and 40x connected to the second terminal row TL2 function as a second guide portion. Thereby, the wiring structure of the battery module 100 becomes simpler and the wiring work becomes easier.

In this embodiment, instead of the bus bar 40a and the relay member 41 of the first embodiment, a bus bar 40x having a substantially L shape is used. The bus bar 40x is connected to the

electrodes

10a and 10b of the battery cell 10 and connected to the FPC board 50, whereby the

electrodes

10a and 10b of the battery cell 10 and the voltage detection circuit 20 are electrically connected. In addition, the bus bar 40x is connected to the

electrodes

10a and 10b of the battery cell 10 and to the relay terminal CT (FIG. 3), whereby the

electrodes

10a and 10b of the plurality of battery cells 10 and the power supply line 501 are electrically connected. Connected to. Thereby, the number of parts is reduced, and the battery module 100 can be assembled more easily. Instead of the bus bar 40x, the bus bar 40a and the relay member 41 of the first embodiment may be used.

As described above, in the battery module 100, the gas duct GD, the wiring member 70, and the lid member 80 can be handled integrally by providing the gas duct GD and the wiring member 70 integrally with the lid member 80. Therefore, the battery module 100 can be easily assembled by attaching the lid member 80 integrally provided with the gas duct GD and the wiring member 70 to the battery block 10BB. Further, the gas discharged from the gas vent valve 10v of the battery cell 10 can be efficiently discharged to the outside through the gas duct GD.

In this example, the battery box BB that houses the battery module 100 is formed, whereby the strength of the battery module 100 is improved. Further, since the battery block 10BB of the battery module 100 is fixed to the casing CA of the battery box BB and the lid member 80 is fitted to the casing CA, the battery block 10BB and the lid member 80 can be reliably fixed. .

(3) Modified Example In this example, a part of the opening of the casing CA is closed by the lid member 80. Therefore, the inside of the battery box BB may be molded with resin. In this case, condensation of the battery cell 10 can be prevented. Further, the resin molded in the battery box BB can affect the heat conduction characteristics of the battery module 100. For example, by molding the inside of the battery box BB with a resin having a higher thermal conductivity than air, the heat in the battery box BB can be released to the outside. On the other hand, by molding the inside of the battery box BB with a resin having a thermal conductivity lower than that of air, the inflow of heat from the outside into the battery box BB can be blocked.

In the above example, the lid member 80 is formed so as to cover the plurality of battery cells 10 between the upper protruding edges 92b of the pair of end face frames 92, but the lid member 80 covers the entire upper surface of the battery block 10BB. It may be formed as follows. In this case, the inside of the battery box BB is closed by the lid member 80. Thus, by providing a hole in at least one of the casing CA and the lid member 80, the battery box BB may be exhausted without providing the gas duct GD.

When the lid member 80 is formed so as to cover the entire upper surface of the battery block 10BB, the concave portion 82 is formed on the back surface of the lid member 80 so as to be substantially equal to the shape and length of the entire bus bar 40x. That is, the recess 82 is formed in a substantially L shape. In the recess 82, the opening 83 is formed at one end, and a screw hole penetrating from the bottom surface of the recess 82 to the surface of the lid member 80 is formed at the other end. The screw hole is formed so as to overlap the power line connection hole 47y of the bus bar 40x fitted in the recess 82 in a state where the lid member 80 is attached to the battery block 10BB. In this case, the bus bar 40x and the connection portion 501a of the power supply line 501 can be fixed to the end face frame 92 by inserting the screw N1 into the screw hole from above the lid member 80.

In the above example, the lid member 80 is used to close the upper opening of the casing CA, but the lid member 80 does not necessarily close the upper opening of the casing CA.

For example, the battery module 100 may not be disposed in the casing CA. In this case, the lid member 80 may be attached on the upper surface of the battery block 10BB instead of closing the upper opening of the casing CA.

In addition, a plurality of battery modules 100 may be arranged in one casing CA. Even in such a case, instead of the single lid member 80 closing the upper opening of the single casing CA, a plurality of lid members 80 may be attached to the upper surfaces of the plurality of battery blocks 10BB, respectively.

At the time of these attachments, for example, the lid member 80 provided integrally with the gas duct GD and the wiring member 70 is disposed on the upper surface of the battery block 10BB. In this state, a nut (not shown) is screwed into the male threads of the plus electrode 10a and the minus electrode 10b of the plurality of battery cells 10 in each opening 83 in FIG. Thereby, while the some battery cell 10 which comprises battery block 10BB is electrically connected, the cover member 80 is easily attached to battery block 10BB.

[5] Fifth Embodiment A battery module according to the fifth embodiment will be described while referring to differences from the battery module 100 according to the fourth embodiment.

(1) Structure of Battery Module FIG. 17 is an exploded perspective view of the battery module according to the fifth embodiment. The battery module 100 according to the fifth embodiment and the battery module 100 according to the fourth embodiment of FIG. 14 differ in the positional relationship between the lid member 80 and the wiring member 70. In battery module 100 according to the present embodiment, gas duct GD is attached to the lower surface of lid member 80, and wiring member 70 is attached to the upper surface of lid member 80. The lid member 80 is formed so as to cover the entire upper surface of the battery block 10BB. Also in the present embodiment, the gas duct GD, the wiring member 70, and the lid member 80 can be handled integrally.

FIG. 18 is a perspective view of the lid member 80 of FIG. 17 as viewed obliquely from below. FIG. 19 is a perspective view of the lid member 80 of FIG. 17 as viewed obliquely from above. As shown in FIG. 18, the back surface of the lid member 80 is formed with a point where the duct fitting portion 87 is formed and a screw hole 83x penetrating from the bottom surface of the recess 82 (FIG. 19) to the surface of the lid member 80. Except for this point, it has substantially the same configuration as the surface of the lid member 80 of FIG.

As shown in FIG. 19, the surface of the lid member 80 is such that the duct fitting portion 87 is not formed, and that the concave portion 82 is formed in a substantially L shape so that it is substantially equal to the shape and length of the bus bar 40x. Except for this, it has substantially the same configuration as the back surface of the lid member 80 of FIG. In the example of FIG. 19, the FPC fitting portion 84 is formed so that the FPC board 50 partially folded back can be fitted. Also in this example, a notch 84 S for drawing out the FPC board 50 fitted to the FPC fitting portion 84 to the outside of the lid member 80 is formed on one end side of the lid member 80. The cutout 84 S constitutes one end of the FPC fitting portion 84.

The gas duct GD and the wiring member 70 are attached to the lid member 80. In this case, the bus bars 40, 40 x of the wiring member 70 are attached to the surface of the lid member 80. In this state, the lid member 80 is attached to the battery block 10BB, and the plurality of bus bars 40, 40x are connected to the plus electrode 10a and the minus electrode 10b of the plurality of battery cells 10. In addition, a part of the two FPC boards 50 is pulled out from the two cutouts 84 S on one end side of the lid member 80. The part of each FPC board 50 drawn out is folded downward at the upper end of one end face frame 92 (end face frame 92 to which the printed circuit board 21 is attached) and connected to the printed circuit board 21. Accordingly, the plurality of bus bars 40, 40x are connected to the voltage detection circuit 20 (FIG. 17) on the printed circuit board 21 via the FPC board 50.

At this time, the other end of one bus bar 40x overlaps the upper protruding edge 92b of one end face frame 92 with the lid member 80 in between, and the other end face of the other bus bar 40x has the lid member 80 in between. It overlaps with the upper protruding edge 92b of the frame 92.

In this state, the screw N1 is screwed into the screw hole 99c of one end face frame 92 through the connection portion 501a of the power supply line 501, the screw hole 83x, and the power supply line connection hole 47y of the one bus bar 40x (FIG. 17). Thereby, the other end part of one bus-bar 40x and the power wire 501 are connected to the relay terminal CT (FIG. 3) comprised from the screw member 993 (FIG. 5) and the screw N1.

Similarly, the screw N1 is screwed into the screw hole 99a of the other end face frame 92 through the connection portion 501a of the power supply line 501, the screw hole 83x, and the power supply line connection hole 47y of the other bus bar 40x (FIG. 17). Thus, the other end of the other bus bar 40x and the power supply line 501 are connected to the relay terminal CT (FIG. 3) including the screw member 991 (FIG. 5) and the screw N1.

(2) Effects of Fifth Embodiment Also in the present embodiment, two notches 92g (FIG. 17) are formed on the upper protruding edge 92b of the end face frame 92. In this case, the two notches 92g function as a first guide part and a second guide part, respectively.

bus bars

pieces

42 and 46 of the plurality of

bus bars

As in the fourth embodiment, a bus bar 40x having a substantially L shape is used in place of the bus bar 40a and the relay member 41 of the first embodiment. Thereby, the number of parts is reduced, and the battery module 100 can be assembled more easily. Instead of the bus bar 40x, the bus bar 40a and the relay member 41 of the first embodiment may be used.

As described above, also in this battery module 100, the gas duct GD, the wiring member 70, and the lid member 80 can be handled integrally by providing the gas duct GD and the wiring member 70 integrally with the lid member 80. Therefore, the battery module 100 can be easily assembled by attaching the lid member 80 provided with the gas duct GD and the wiring member 70 to the battery block 10BB. Further, the gas discharged from the gas vent valve 10v of the battery cell 10 can be efficiently discharged to the outside through the gas duct GD.

Also in this example, the strength of the battery module 100 is improved by forming the battery box BB that houses the battery module 100. Further, since the battery block 10BB of the battery module 100 is fixed to the casing CA of the battery box BB and the lid member 80 is fitted to the casing CA, the battery block 10BB and the lid member 80 can be reliably fixed. .

(3) Modification In this example, the opening of the casing CA is closed by the lid member 80. Therefore, the inside of the battery box BB may be molded with resin. In this case, condensation of the battery cell 10 can be prevented. Further, the resin molded in the battery box BB can affect the heat conduction characteristics of the battery module 100. For example, by molding the inside of the battery box BB with a resin having a higher thermal conductivity than air, the heat in the battery box BB can be released to the outside. On the other hand, by molding the inside of the battery box BB with a resin having a thermal conductivity lower than that of air, the inflow of heat from the outside into the battery box BB can be blocked.

In the present embodiment, the inside of the battery box BB is closed by the lid member 80. Thus, by providing a hole in at least one of the casing CA and the lid member 80, the battery box BB may be exhausted without providing the gas duct GD.

[6] Sixth Embodiment A battery module according to a sixth embodiment will be described while referring to differences from the battery module 100 according to the fourth embodiment.

(1) Structure of Battery Module FIG. 20 is an exploded perspective view of the battery module according to the sixth embodiment. As shown in FIG. 20, in the battery module 100 according to the present embodiment, as in the first embodiment, the positive electrode 10a and the negative electrode 10b of each battery cell 10 protrude upward, respectively. It is provided with an inclination.

In the present embodiment, the gas duct GD, the wiring member 70, and the lid member 80 are individually attached to the battery block 10BB. That is, in the present embodiment, the wiring member 70 and the gas duct GD are not attached to the lid member 80. Therefore, the lid member 80 is not formed with the FPC fitting portion 84, the

concave portions

81 and 82, and the

connection grooves

85 and 86 shown in FIG. Further, the plurality of openings 83 in FIG. 16 are not formed in the lid member 80.

When producing the battery module 100 according to the present embodiment, the gas duct GD and the wiring member 70 are first attached to the upper surface of the battery block 10BB, as in the first embodiment.

By attaching the wiring member 70 to the upper surface of the battery block 10BB, adjacent battery cells 10 are electrically connected via the bus bar 40. As a result, the plurality of battery cells 10 are connected in series. Further, a part of the two FPC boards 50 of the wiring members 70 are folded back at right angles toward the inside in the vicinity of the upper end portion of one end face frame 92 (end face frame 92 to which the printed circuit board 21 is attached). It is folded downward and connected to the printed circuit board 21. As a result, the plurality of bus bars 40, 40 x are connected to the voltage detection circuit 20 on the printed circuit board 21 via the FPC board 50.

In this state, the screw N1 is screwed into the screw hole 99c of the one end face frame 92 through the connection portion 501a of the power supply line 501 and the power supply line connection hole 47y of the one bus bar 40x. Thereby, the other end part of one bus-bar 40x and the power wire 501 are connected to the relay terminal CT (FIG. 3) comprised from the screw member 993 (FIG. 5) and the screw N1.

Similarly, the screw N1 is screwed into the screw hole 99a of the other end face frame 92 through the connection portion 501a of the power supply line 501 and the power supply line connection hole 47y of the other bus bar 40x. Thus, the other end of the other bus bar 40x and the power supply line 501 are connected to the relay terminal CT (FIG. 3) including the screw member 991 (FIG. 5) and the screw N1.

Thereafter, the battery block 10BB is disposed in the casing CA whose upper portion is opened, and the lid member 80 is attached to the upper end portion of the casing CA so as to close the opening of the casing CA.

In the following description, one side and the other side of the lid member 80 along the X direction are referred to as a side side 80a and a side side 80b, respectively, and one side and the other side of the lid member 80 along the Y direction are respectively referred to as an end side 80c and an end side. Called side 80d. Further, one side surface and the other side surface of the casing CA parallel to the XZ plane are referred to as side surfaces 80a and 80b, respectively, and one end surface and the other end surface of the casing CA parallel to the YZ plane are referred to as end surfaces 80c and 80d, respectively.

The dimension of the lid member 80 in the Y direction (distance between the pair of

side sides

80a and 80b) is almost the same as the dimension of the opening of the casing CA in the Y direction (distance between the pair of side surfaces CA1 and CA2 of the casing CA). Set to be equal. On the other hand, the dimension of the lid member 80 in the X direction (the distance between the pair of

end sides

80c and 80d of the lid member 80) is the dimension of the opening of the casing CA in the X direction (the distance between the pair of end surfaces CA3 and CA4 of the casing CA). It is set to be smaller than that. In this case, for example, the lid member 80 and the casing CA are screwed in a state where the pair of

side sides

80a and 80b of the lid member 80 are in contact with the upper end portions of the pair of side surfaces CA1 and CA2 of the casing CA, or an adhesive is used. By joining, the cover member 80 can be attached to the upper end of the casing CA.

Here, in the present embodiment, as described above, the dimension of the lid member 80 in the X direction is set to be smaller than the dimension of the opening of the casing CA in the X direction. Further, the lid member 80 is formed so as to cover the plurality of battery cells 10 between the upper protruding edges 92 b of the pair of end face frames 92. Thereby, between the cover member 80 and the upper end part of the casing CA with the cover member 80 fitted to the casing CA (between the end side 80c of the cover member 80 and the end surface CA3 of the casing CA, and the cover member). A gap corresponding to the upper projecting edge 92b is formed between the end side 80d of 80 and the end surface CA4 of the casing CA. Therefore, the power line 501 connected to the relay terminal CT (FIG. 3) at the upper protruding edge 92b of the end face frame 92 of the battery module 100 can be easily moved to the outside of the casing CA from the gap between the lid member 80 and the upper end portion of the casing CA. It can be pulled out. As described above, the battery box BB that houses the battery module 100 is formed.

(2) Effects of Sixth Embodiment As described above, in the present embodiment, the lid member 80 is formed so as to cover the plurality of battery cells 10 between the upper projecting edges 92b of the pair of end face frames 92. Has been. Thereby, the power supply line 501 connected to the battery block 10BB can be easily pulled out through the gap between the lid member 80 and the upper end of the casing CA.

In this embodiment, the wiring member 70, the lid member 80, and the gas duct GD are individually attached to the battery block 10BB. Therefore, it is not necessary to form the FPC fitting portion 84, the

concave portions

81 and 82, and the

connection grooves

85 and 86 for attaching the wiring member 70 and the gas duct GD to the lid member 80. Therefore, the configuration of the lid member 80 is simplified, and the cost of the lid member 80 is reduced.

(3) Modification In this example, a gap corresponding to the upper protruding edge 92b is formed between the lid member 80 and the upper end portion of the casing CA. Therefore, after the power supply line 501 is drawn out from the casing CA, the inside of the battery box BB may be molded with resin. In this case, condensation of the battery cell 10 can be prevented. Further, the resin molded in the battery box BB can affect the heat conduction characteristics of the battery module 100. For example, by molding the inside of the battery box BB with a resin having a higher thermal conductivity than air, the heat in the battery box BB can be released to the outside. On the other hand, by molding the inside of the battery box BB with a resin having a thermal conductivity lower than that of air, the inflow of heat from the outside into the battery box BB can be blocked.

In the above example, the lid member 80 is formed so as to cover the plurality of battery cells 10 between the upper protruding edges 92b of the pair of end face frames 92, but the lid member 80 covers the entire upper surface of the battery block 10BB. It may be formed as follows. In this case, the inside of the battery box BB is closed by the lid member 80. Therefore, by providing a hole in at least one of the casing CA and the lid member 80, the power supply line 501 may be drawn from the casing CA through the hole.

[7] Battery System Hereinafter, a battery system including the battery module 100 according to the first embodiment will be described.

(1) Schematic Configuration of Battery System FIG. 21 is a block diagram illustrating a configuration of a battery system including the battery module 100 according to the first embodiment. As shown in FIG. 21, the battery system 500 includes a plurality of battery modules 100 (four in this example), a battery ECU 101, and a contactor 102. In the battery system 500, the plurality of battery modules 100 are connected to the battery ECU 101 via the communication line 560. In each battery module 100, the communication line 560 is connected to the communication circuit 24 (see FIG. 1 and the like). Battery ECU 101 is connected to main controller 300 of the electric vehicle via bus 104.

The plurality of battery modules 100 of the battery system 500 are connected to each other through the power line 501. In the battery system 500, all the battery cells 10 of the plurality of battery modules 100 are connected in series. The power supply line 501 connected to the highest potential positive electrode 10a (FIG. 2) of the plurality of battery modules 100 and the power supply line 501 connected to the lowest potential negative electrode 10b (FIG. 2) of the plurality of battery modules 100 are In addition, it is connected to a load such as a motor of an electric vehicle via the contactor 102.

As shown in FIG. 21, the communication circuit 24 and the battery ECU 101 of each battery module 100 are connected in series via a communication line 560. Thereby, the communication circuit 24 of each battery module 100 can communicate with the other battery modules 100 and the battery ECU 101. As the communication line 560, for example, a harness is used.

The communication circuit 24 of each battery module 100 gives information regarding the terminal voltage of each battery cell 10, the current flowing through the plurality of battery cells 10 and the temperature of the battery module 100 to the other battery modules 100 or the battery ECU 101, for example. Hereinafter, information regarding these terminal voltage, current, and temperature is referred to as cell information.

The battery ECU 101 calculates the charge amount of each battery cell 10 based on, for example, cell information given from the communication circuit 24 of each battery module 100, and performs charge / discharge control of each battery module 100 based on the charge amount. Further, the battery ECU 101 detects an abnormality of each battery module 100 based on the cell information given from the communication circuit 24 of each battery module 100. The abnormality of the battery module 100 is, for example, overdischarge, overcharge, or temperature abnormality of the battery cell 10.

In this example, the battery ECU 101 calculates the charge amount of each battery cell 10 and detects overdischarge, overcharge, temperature abnormality, etc. of the battery cell 10, but is not limited thereto. The communication circuit 24 of each battery module 100 may calculate the charge amount of each battery cell 10 and detect overdischarge, overcharge, or temperature abnormality of the battery cell 10, and give the result to the battery ECU 101.

The contactor 102 is inserted in the power supply line 501 connected to the battery module 100. When the battery ECU 101 detects an abnormality in the battery module 100, the battery ECU 101 turns off the contactor 102. Thereby, when an abnormality occurs, no current flows through each battery module 100, and thus abnormal heat generation of the battery module 100 is prevented. In this example, the battery ECU 101 controls the ON and OFF of the contactor 102, but is not limited to this. The communication circuit 24 may control on and off of the contactor 102.

The charge amount of each battery module 100 (charge amount of the battery cell 10) is given from the battery ECU 101 to the main control unit 300. The main control unit 300 controls the power of the electric vehicle (for example, the rotational speed of the motor) based on the amount of charge. When the charge amount of each battery module 100 decreases, the main control unit 300 controls each power generation device (not shown) connected to the power line 501 to charge each battery module 100.

Note that the power generation device is, for example, a motor connected to the power supply line 501 described above. In this case, the motor converts the electric power supplied from the battery system 500 during acceleration of the electric vehicle into motive power for driving drive wheels (not shown). The motor generates regenerative power when the electric vehicle is decelerated. Each battery module 100 is charged by this regenerative power.

In this example, the communication circuit 24 may have a function for calculating information such as SOH (State Of Health: life of the battery cell 10) and SOC based on the detection result of the voltage detection circuit 20. In this case, the communication circuit 24 transmits the calculated SOH and SOC to the battery ECU 101.

The battery system 500 of FIG. 21 may include the battery module 100 according to any of the second to sixth embodiments instead of the battery module 100 according to the first embodiment.

(2) Effect of Battery System Comprising Battery Module According to Any of First to Sixth Embodiments A battery system according to another embodiment of the present invention includes one or a plurality of battery modules. At least one of the plurality of battery modules is the battery module according to any one of the first to sixth embodiments.

The battery system includes at least one battery module described above. Therefore, the wiring structure of the battery module is simplified and wiring work is facilitated. As a result, the assembly work of the battery system is facilitated, and the manufacturing cost can be sufficiently reduced.

(3) First Configuration Example of Battery System FIG. 22 is a schematic plan view showing a first configuration example of the battery system 500 of FIG. As shown in FIG. 22, the battery system 500 includes four battery modules 100, a battery ECU 101, a contactor 102, an HV (High Voltage) connector 520, and a service plug 530. Each battery module 100 has the same configuration as the battery module 100 according to the first embodiment.

In the following description, the four battery modules 100 are referred to as

battery modules

100a, 100b, 100c, and 100d, respectively. Of the pair of end face frames 92 provided in the

battery modules

100a, 100b, 100c, and 100d, the end face frame 92 to which the printed circuit board 21 is attached is called an end face frame 92A, and the end face frame 92 to which the printed circuit board 21 is not attached. Is referred to as an end face frame 92B.

The

battery modules

100a, 100b, 100c, 100d, the battery ECU 101, the contactor 102, the HV connector 520, and the service plug 530 are accommodated in a box-shaped casing 550.

Casing 550 has

side portions

550a, 550b, 550c, and 550d. The

side surface portions

550a and 550c are parallel to each other, and the

side surface portions

550b and 550d are parallel to each other and perpendicular to the

side surfaces

550a and 550c.

In the casing 550, the

battery modules

100a and 100b are arranged in a line at intervals. In this case, the

battery modules

100a and 100b are arranged so that the end face frame 92B of the battery module 100a and the end face frame 92A of the battery module 100b face each other.

Battery modules

100c and 100d are arranged in a line at intervals. In this case, the

battery modules

100a and 100b are arranged so that the end face frame 92A of the battery module 100c and the end face frame 92B of the battery module 100d face each other.

Hereinafter, the

battery modules

100a and 100b arranged in a row are referred to as a module row T1, and the

battery modules

100c and 100d arranged in a row are referred to as a module row T2.

In the casing 550, the module row T1 is arranged along the side surface portion 550a, and the module row T2 is arranged in parallel with the module row T1. In the module row T1, the end surface frame 92A of the battery module 100a is directed to the side surface portion 550d, and the end surface frame 92B of the battery module 100b is directed to the side surface portion 550b. In the module row T2, the end surface frame 92B of the battery module 100c is directed to the side surface portion 550d, and the end surface frame 92A of the battery module 100d is directed to the side surface portion 550b.

In the region between the module row T2 and the side surface portion 550c, the battery ECU 101, the service plug 530, the HV connector 520, and the contactor 102 are arranged in this order from the side surface portion 550d to the side surface portion 550b.

In each of the

battery modules

100a, 100b, 100c, 100d, the potential of the positive electrode 10a (FIG. 2) of the battery cell 10 adjacent to the end face frame 92A is the highest, and the negative electrode 10b of the battery cell 10 adjacent to the end face frame 92b ( The potential in Fig. 2) is the lowest. Hereinafter, the positive electrode 10a having the highest potential in each of the battery modules 100a to 100d is referred to as a high potential electrode 10A, and the negative electrode 10b having the lowest potential in each of the battery modules 100a to 100d is referred to as a low potential electrode 10B.

In each of the battery modules 100a to 100d, one end of the relay member 41 is connected to the high potential electrode 10A, and the other end of the relay member 41 is connected to the relay terminal CT provided on the upper surface of the end face frame 92A. One end of the relay member 41 is connected to the low potential electrode 10B, and the other end of the relay member 41 is connected to the relay terminal CT provided on the upper surface of the end face frame 92B.

The other end of the relay member 41 connected to the low potential electrode 10B of the battery module 100a and the other end of the relay member 41 connected to the high potential electrode 10A of the battery module 100b are connected to the relay terminal CT and the power supply line D01. Are connected to each other.

The other end of the relay member 41 connected to the high potential electrode 10A of the battery module 100c and the other end of the relay member 41 connected to the low potential electrode 10B of the battery module 100d are connected to the relay terminal CT and the power line D02. Are connected to each other.

The power lines D01 and D02 correspond to the power lines 501 that connect the battery modules 100 in FIG. A harness, a lead wire, or the like is used as the power supply lines D01 and D02.

The other end of the relay member 41 connected to the high potential electrode 10A of the battery module 100a is connected to the service plug 530 via the relay terminal CT and the power supply line D1, and the relay connected to the low potential electrode 10B of the battery module 100c. The other end of the member 41 is connected to the service plug 530 via the relay terminal CT and the power supply line D2. The power supply lines D1 and D2 correspond to the power supply lines 501 that connect the battery modules 100 in FIG.

When the service plug 530 is turned on, the

battery modules

100a, 100b, 100c, and 100d are connected in series. In this case, the potential of the high potential electrode 10A of the battery module 100d is the highest, and the potential of the low potential electrode 10B of the battery module 100b is the lowest.

The service plug 530 is turned off by an operator when the battery system 500 is maintained, for example. When the service plug 530 is turned off, the series circuit composed of the

battery modules

100a and 100b and the series circuit composed of the

battery modules

100c and 100d are electrically separated. In this case, the current path between the plurality of battery modules 100a to 100d is interrupted. This ensures safety during maintenance.

The other end of the relay member 41 connected to the low potential electrode 10B of the battery module 100b is connected to the contactor 102 via the relay terminal CT and the power supply line D3, and the relay member connected to the high potential electrode 10A of the battery module 100d. The other end of 41 is connected to the contactor 102 via the relay terminal CT and the power supply line D4. Contactor 102 is connected to HV connector 520 through power supply lines D5 and D6. The HV connector 520 is connected to a load such as a motor of an electric vehicle. The power supply lines D3 and D4 correspond to the power supply line 501 connecting the battery module 100 and the contactor 102 of FIG. The power supply lines D5 and D6 correspond to the power supply line 501 extending from the contactor 102 in FIG. 21 to the outside.

In the state where the contactor 102 is turned on, the battery module 100b is connected to the HV connector 520 via the power lines D3 and D5, and the battery module 100d is connected to the HV connector 520 via the power lines D4 and D6. Thereby, electric power is supplied from the

battery modules

100a, 100b, 100c, and 100d to the load. In addition, the

battery modules

100a, 100b, 100c, and 100d are charged with the contactor 102 turned on.

When the contactor 102 is turned off, the connection between the battery module 100b and the HV connector 520 and the connection between the battery module 100d and the HV connector 520 are cut off.

During maintenance of the battery system 500, the contactor 102 is also turned off by the operator together with the service plug 530. In this case, the current path between the plurality of battery modules 100a to 100d is reliably interrupted. Thereby, safety at the time of maintenance is sufficiently ensured. When the voltages of the

battery modules

100a, 100b, 100c, and 100d are equal to each other, the total voltage of the series circuit including the

battery modules

100a and 100b is equal to the total voltage of the series circuit including the

battery modules

100c and 100d. . This prevents a high voltage from being generated in the battery system 500 during maintenance.

The printed circuit board 21 (see FIG. 1 and the like) of the battery module 100a and the printed circuit board 21 of the battery module 100b are connected to each other via a communication line P11. The printed circuit board 21 of the battery module 100a and the printed circuit board 21 of the battery module 100c are connected to each other via the communication line P12. The printed circuit board 21 of the battery module 100c and the printed circuit board 21 of the battery module 100d are connected to each other via a communication line P13. The printed circuit board 21 of the battery module 100b is connected to the battery ECU 101 via the communication line P14. The communication lines P11 to P14 correspond to the communication line 560 in FIG. A bus is configured by the communication lines P11 to P14.

For example, the cell information detected by the voltage detection circuit 20 of the battery module 100a is given to the battery ECU 101 via the communication lines P11 and P14. Further, a predetermined control signal is given from the battery ECU 101 to the printed circuit board 21 of the battery module 100a via the communication lines P14 and P11.

The cell information detected by the voltage detection circuit 20 of the battery module 100b is given to the battery ECU 101 via the communication line P14. In addition, a predetermined control signal is given from the battery ECU 101 to the printed circuit board 21 of the battery module 100b via the communication line P14.

The cell information detected by the voltage detection circuit 20 of the battery module 100c is given to the battery ECU 101 via the communication lines P12, P11, and P14. In addition, a predetermined control signal is given from the battery ECU 101 to the printed circuit board 21 of the battery module 100c through the communication lines P14, P11, and P12.

The cell information detected by the voltage detection circuit 20 of the battery module 100d is given to the battery ECU 101 via the communication lines P13, P12, P11, and P14. In addition, a predetermined control signal is given from the battery ECU 101 to the printed circuit board 21 of the battery module 100d through the communication lines P14, P11, P12, and P13.

The battery system 500 includes the battery module 100 according to the first embodiment. This simplifies the wiring structure of the battery module 100 and facilitates wiring work. As a result, the assembly operation of the battery system 500 is facilitated, and the manufacturing cost can be sufficiently reduced.

In particular, in the battery system 500, the service plug 530 is connected to the relay member 41 via the relay terminal CT on the upper surfaces of the end surface frames 92A and 92B of the

battery modules

100a and 100c. Further, the contactor 102 is connected to the relay member 41 via the relay terminal CT on the upper surfaces of the end face frames 92B and 92A of the

battery modules

100b and 100d. Therefore, service plug 530 and contactor 102 can be easily connected to battery modules 100a to 100d.

Not limited to the above, the battery system 500 may include the battery module 100 according to any one of the second to sixth embodiments instead of the battery module 100 according to the first embodiment. Even in this case, the assembling work of the battery system 500 is facilitated, and the manufacturing cost can be sufficiently reduced.

(4) Second Configuration Example of Battery System FIG. 23 is a schematic plan view showing a second configuration example of the battery system 500 of FIG. The battery system 500 of FIG. 23 will be described while referring to differences from the battery system 500 of FIG.

In this example, the relay member 41 is not connected to the low potential electrode 10B of the battery module 100a, the high potential electrode 10A of the battery module 100b, the high potential electrode 10A of the battery module 100c, and the low potential electrode 10B of the battery module 100d.

The low potential electrode 10B of the battery module 100a and the high potential electrode 10A of the battery module 100b are connected to each other via the power line D01. The high potential electrode 10A of the battery module 100c and the low potential electrode 10B of the battery module 100d are connected to each other via the power supply line D02.

Also in this example, in the

battery modules

100a and 100d, one end of the relay member 41 is connected to the high potential electrode 10A, and the other end of the relay member 41 is connected to the relay terminal CT provided on the upper surface of the end face frame 92A. . In the

battery modules

100b and 100c, one end of the relay member 41 is connected to the low potential electrode 10B, and the other end of the relay member 41 is connected to the relay terminal CT provided on the upper surface of the end face frame 92B.

The relay terminal CT and relay member 41 and the FPC board 50 are arranged so as not to overlap each other. This simplifies the wiring structure of the battery module 100 and facilitates wiring work. Therefore, the assembly work of the battery system 500 is facilitated, and the manufacturing cost can be sufficiently reduced.

(5) Third Configuration Example of Battery System FIG. 24 is a schematic plan view showing a third configuration example of the battery system 500 of FIG. A difference between the battery system 500 of FIG. 24 and the battery system 500 of FIG. 23 will be described.

In this example, the low potential electrode 10B of the battery module 100a and the high potential electrode 10A of the battery module 100b are connected to each other via a strip-shaped bus bar D03. The high potential electrode 10A of the battery module 100c and the low potential electrode 10B of the battery module 100d are connected to each other via a strip-shaped bus bar D04. The bus bars D03 and D04 correspond to the power supply line 501 that connects the battery modules 100 in FIG.

(6) Fourth Configuration Example of Battery System FIG. 25 is a schematic plan view showing a fourth configuration example of the battery system 500 of FIG. The battery system 500 of FIG. 25 will be described while referring to differences from the battery system 500 of FIG.

In this example, the relay member 41 is not connected to the low potential electrode 10B of the battery module 100a and the low potential electrode 10B of the battery module 100d.

The other end of the relay member 41 connected to the low potential electrode 10B of the battery module 100a and the high potential electrode 10A of the battery module 100b is connected to each other via the relay terminal CT and the power supply line D01. The other end of the relay member 41 connected to the high potential electrode 10A of the battery module 100c and the low potential electrode 10B of the battery module 100d are connected to each other via the relay terminal CT and the power supply line D02.

(7) Fifth Configuration Example of Battery System FIG. 26 is a schematic plan view showing a fifth configuration example of the battery system 500 of FIG. The battery system 500 of FIG. 26 will be described while referring to differences from the battery system 500 of FIG.

In this example, the battery ECU 101, the service plug 530, the HV connector 520, and the contactor 102 are arranged in this order from the side surface portion 550d to the side surface portion 550b in the region between the module row T1 and the side surface portion 550a.

In this case, the distance between the battery module 100b and the battery ECU 101 is shorter than that of the battery system 500 of FIG. In this case, the length of the communication line P14 that connects the printed circuit board 21 of the battery module 100b and the battery ECU 101 can be shortened. This makes it difficult for the communication line P14 to be disconnected. As a result, the reliability of the battery system 500 is improved.

(8) Effects of Battery Systems According to Second, Third, and Fifth Configuration Examples In the battery systems according to the second, third, and fifth configuration examples, the

battery modules

100a and 100d are the first battery modules. The

battery modules

100b and 100c are examples of the second battery module, the power lines D01 and D02 in FIGS. 23 and 26 and the bus bars D03 and D04 in FIG. 24 are examples of the second connection members, The power conversion unit 601 and the motor 602 are examples of external devices, and the contactor 102 and the service plug 530 are examples of switching devices.

A battery system according to still another embodiment of the present invention is connectable to an external device, and includes a first battery module including the battery module, a second battery module including a plurality of battery cells, A second connection member that electrically connects an electrode terminal of one battery cell of one battery module and an electrode terminal of one battery cell of the second battery module; an external device; and first and second batteries And an opening / closing device that opens and closes an electrical connection with the module, and the relay terminal of the first battery module is connected to the opening / closing device.

In the battery system, the electrode terminal of one battery cell of the first battery module and the electrode terminal of one battery cell of the second battery module are electrically connected by the second connecting member. Thereby, the some battery cell of a 1st and 2nd battery module can be connected in series.

The relay terminal of the first battery module is connected to the switchgear. In this case, since the first battery module is composed of the battery module described above, the wiring structure of the first battery module is simplified and the wiring work is facilitated. As a result, the assembly work of the battery system is facilitated, and the manufacturing cost can be sufficiently reduced. Further, the switchgear can be easily connected to the relay terminal of the first battery module.

[8] Seventh Embodiment (1) Configuration and Operation Hereinafter, an electric vehicle according to a seventh embodiment will be described. The electric vehicle according to the present embodiment includes any one of battery systems 500 shown in FIGS. In the following, an electric vehicle will be described as an example of an electric vehicle.

FIG. 27 is a block diagram illustrating a configuration of an electric vehicle including the battery system 500. As shown in FIG. 27, electric vehicle 600 according to the present embodiment includes a vehicle body 610. The vehicle body 610 is provided with the main control unit 300 and the battery system 500, the power conversion unit 601, the motor 602, the drive wheels 603, the accelerator device 604, the brake device 605, and the rotation speed sensor 606 of FIG. When motor 602 is an alternating current (AC) motor, power conversion unit 601 includes an inverter circuit.

The battery system 500 is connected to the motor 602 via the power conversion unit 601 and to the main control unit 300. The main control unit 300 is given a charge amount of the plurality of battery modules 100 (FIG. 21) and a current value flowing through the battery modules 100 from the battery ECU 101 (FIG. 21) constituting the battery system 500. In addition, an accelerator device 604, a brake device 605, and a rotation speed sensor 606 are connected to the main control unit 300. The main control unit 300 includes, for example, a CPU and a memory, or a microcomputer.

The accelerator device 604 includes an accelerator pedal 604a included in the electric automobile 600 and an accelerator detection unit 604b that detects an operation amount (depression amount) of the accelerator pedal 604a. When the accelerator pedal 604a is operated by the driver, the accelerator detector 604b detects the operation amount of the accelerator pedal 604a based on a state where the driver is not operated. The detected operation amount of the accelerator pedal 604a is given to the main controller 300.

The brake device 605 includes a brake pedal 605a included in the electric automobile 600 and a brake detection unit 605b that detects an operation amount (depression amount) of the brake pedal 605a by the driver. When the brake pedal 605a is operated by the driver, the operation amount is detected by the brake detection unit 605b. The detected operation amount of the brake pedal 605a is given to the main control unit 300. The rotation speed sensor 606 detects the rotation speed of the motor 602. The detected rotation speed is given to the main control unit 300.

As described above, the main controller 300 is given the charge amount of the battery module 100, the current value flowing through the battery module 100, the operation amount of the accelerator pedal 604a, the operation amount of the brake pedal 605a, and the rotation speed of the motor 602. . The main control unit 300 performs charge / discharge control of the battery module 100 and power conversion control of the power conversion unit 601 based on these pieces of information. For example, the electric power of the battery module 100 is supplied from the battery system 500 to the power conversion unit 601 when the electric automobile 600 is started and accelerated based on the accelerator operation.

Further, the main control unit 300 calculates a rotational force (command torque) to be transmitted to the drive wheels 603 based on the given operation amount of the accelerator pedal 604a, and outputs a control signal based on the command torque to the power conversion unit 601. To give.

The power conversion unit 601 that has received the control signal converts the power supplied from the battery system 500 into power (drive power) necessary for driving the drive wheels 603. As a result, the driving power converted by the power converter 601 is supplied to the motor 602, and the rotational force of the motor 602 based on the driving power is transmitted to the driving wheels 603.

On the other hand, when the electric automobile 600 is decelerated based on the brake operation, the motor 602 functions as a power generator. In this case, the power conversion unit 601 converts the regenerative power generated by the motor 602 into power suitable for charging the battery module 100 and supplies the power to the battery module 100. Thereby, the battery module 100 is charged.

(2) Effect of Seventh Embodiment As described above, the electric automobile 600 according to the present embodiment includes the battery system 500 of any of FIGS. The battery system 500 is provided with a battery module according to any one of the first to sixth embodiments.

In this case, the wiring structure of the battery module 100 is simplified and wiring work is facilitated. As a result, the assembly work of the electric automobile 600 becomes easy, and the manufacturing cost can be sufficiently reduced. In addition, maintenance of the electric vehicle 600 is facilitated.

(3) Effect of Electric Vehicle According to Seventh Embodiment An electric vehicle according to still another embodiment of the present invention includes the above battery system, a motor driven by electric power from the battery system, And a drive wheel that is rotated by a rotational force.

In the electric vehicle, the motor is driven by the electric power from the battery system. The drive wheel is rotated by the rotational force of the motor to move the electric vehicle.

In this case, the wiring structure of the battery module is simplified and wiring work is facilitated. As a result, the assembly work of the electric vehicle is facilitated, and the manufacturing cost can be sufficiently reduced. In addition, maintenance of the electric vehicle is facilitated.

(4) Other Mobile Body The battery system 500 of any of FIGS. 21 to 26 may be mounted on another mobile body such as a ship, an aircraft, an elevator, or a walking robot.

A ship equipped with the battery system 500 includes, for example, a hull instead of the vehicle body 610 in FIG. 27, a screw instead of the drive wheel 603, an acceleration input unit instead of the accelerator device 604, and a brake device 605. Instead, a deceleration input unit is provided. The driver operates the acceleration input unit instead of the accelerator device 604 when accelerating the hull, and operates the deceleration input unit instead of the brake device 605 when decelerating the hull. In this case, the hull corresponds to the moving main body, the motor corresponds to the power source, and the screw corresponds to the drive unit. The ship does not have to include a deceleration input unit. In this case, when the driver operates the acceleration input unit to stop the acceleration of the hull, the hull is decelerated due to the resistance of water. In such a configuration, the motor receives electric power from the battery system 500 and converts the electric power into power, and the hull moves by rotating the screw with the converted power.

Similarly, an aircraft equipped with the battery system 500 includes, for example, a fuselage instead of the vehicle body 610 of FIG. 27, a propeller instead of the drive wheels 603, an acceleration input unit instead of the accelerator device 604, and a brake. A deceleration input unit is provided instead of the device 605. In this case, the airframe corresponds to the moving main body, the motor corresponds to the power source, and the propeller corresponds to the drive unit. Note that the aircraft may not include a deceleration input unit. In this case, when the driver operates the acceleration input unit to stop the acceleration, the airframe decelerates due to the air resistance. In such a configuration, the motor receives electric power from the battery system 500 and converts the electric power into motive power, and the propeller is rotated by the converted motive power, whereby the airframe moves.

The elevator equipped with the battery system 500 includes, for example, a saddle instead of the vehicle body 610 in FIG. 27, a lifting rope attached to the saddle instead of the driving wheel 603, and an acceleration input unit instead of the accelerator device 604. And a deceleration input unit instead of the brake device 605. In this case, the kite corresponds to the moving main body, the motor corresponds to the power source, and the lifting rope corresponds to the drive unit. In such a configuration, the motor receives electric power from the battery system 500 and converts the electric power into motive power, and the elevating rope is wound up by the converted motive power, so that the kite moves up and down.

A walking robot equipped with the battery system 500 includes, for example, a torso instead of the vehicle body 610 in FIG. 27, a foot instead of the driving wheel 603, an acceleration input unit instead of the accelerator device 604, and a brake device 605. A deceleration input unit is provided instead of. In this case, the body corresponds to the moving main body, the motor corresponds to the power source, and the foot corresponds to the drive unit. In such a configuration, the motor receives electric power from the battery system 500 and converts the electric power into power, and the torso moves by driving the foot with the converted power.

As described above, in the moving body on which the battery system 500 is mounted, the power source receives power from the battery system 500 and converts the power into power, and the drive unit is moved by the power converted by the power source. Move.

(5) Effects on Other Moving Objects The battery system 500 of any of FIGS. 21 to 26 is also provided in such various moving objects. The battery system 500 is provided with a battery module according to any one of the first to sixth embodiments. Thereby, the assembly work of a moving body becomes easy and manufacturing cost can fully be reduced. In addition, maintenance of the moving body is facilitated.

(6) Effects of moving body according to seventh embodiment A moving body according to still another embodiment of the present invention is configured to transfer the power from the battery system, the moving main body, and the battery system to the moving main body. A power source that converts the power into the power for moving the motor and a drive unit that moves the moving main body by the power converted by the power source.

In the moving body, the electric power from the battery system is converted into power by the power source, and the moving main body moves by the power.

Since the above battery system is used for the moving body, the wiring structure of the battery module is simplified and the wiring work is facilitated. As a result, the assembly work of the moving body is facilitated, and the manufacturing cost can be sufficiently reduced. In addition, maintenance of the moving body is facilitated.

[9] Eighth Embodiment A power supply device according to an eighth embodiment will be described. The power supply apparatus according to the present embodiment includes any one of the battery systems 500 shown in FIGS.

(1) Configuration and Operation FIG. 28 is a block diagram illustrating a configuration of a power supply device including a battery system 500. As illustrated in FIG. 28, the power supply device 700 includes a power storage device 710 and a power conversion device 720. The power storage device 710 includes a battery system group 711 and a system controller 712. The battery system group 711 includes any one of the battery systems 500 shown in FIGS. Among the plurality of battery systems 500, the plurality of battery systems 500 may be connected to each other in parallel, or may be connected to each other in series. The plurality of battery systems 500 may be connected by a combination of series and parallel. For example, a subsystem group including a plurality of battery systems 500 connected in series may be connected in parallel to each other.

The system controller 712 is an example of a system control unit, and includes, for example, a CPU and a memory, or a microcomputer. The system controller 712 is connected to the battery ECU 101 (see FIG. 21) of each battery system 500. The battery ECU 101 of each battery system 500 calculates the charge amount of each battery cell 10 based on the terminal voltage of each battery cell 10, and gives the calculated charge amount to the system controller 712. The system controller 712 controls the power conversion device 720 based on the charge amount of each battery cell 10 given from each battery ECU 101, thereby controlling the discharge or charging of the plurality of battery cells 10 included in each battery system 500. I do.

The power converter 720 includes a DC / DC (DC / DC) converter 721 and a DC / AC (DC / AC) inverter 722. The DC / DC converter 721 has input /

output terminals

721a and 721b, and the DC / AC inverter 722 has input /

output terminals

722a and 722b. The input / output terminal 721 a of the DC / DC converter 721 is connected to the battery system group 711 of the power storage device 710. The input / output terminal 721b of the DC / DC converter 721 and the input / output terminal 722a of the DC / AC inverter 722 are connected to each other and to the power output unit PU1. The input / output terminal 722b of the DC / AC inverter 722 is connected to the power output unit PU2 and to another power system. The power output units PU1, PU2 include, for example, outlets. For example, various loads are connected to the power output units PU1 and PU2. Other power systems include, for example, commercial power sources or solar cells. This is an external example in which power output units PU1, PU2 and another power system are connected to a power supply device.

The DC / DC converter 721 and the DC / AC inverter 722 are controlled by the system controller 712, whereby the plurality of battery cells 10 included in the battery system group 711 are discharged and charged.

When the battery system group 711 is discharged, power supplied from the battery system group 711 is DC / DC (direct current / direct current) converted by the DC / DC converter 721, and further DC / AC (direct current / alternating current) conversion is performed by the DC / AC inverter 722. Is done.

The power DC / DC converted by the DC / DC converter 721 is supplied to the power output unit PU1. The power DC / AC converted by the DC / AC inverter 722 is supplied to the power output unit PU2. DC power is output to the outside from the power output unit PU1, and AC power is output to the outside from the power output unit PU2. The electric power converted into alternating current by the DC / AC inverter 722 may be supplied to another electric power system.

The system controller 712 performs the following control as an example of control related to the discharge of the plurality of battery cells 10 included in each battery system 500. When the battery system group 711 is discharged, the system controller 712 determines whether or not to stop discharging based on the charge amount of each battery cell 10 given from each battery ECU 101 (see FIG. 21), and based on the determination result. The power converter 720 is controlled. Specifically, when the charge amount of any one of the plurality of battery cells 10 included in the battery system group 711 becomes smaller than a predetermined threshold value, the system controller 712 stops discharging. Or the DC / DC converter 721 and the DC / AC inverter 722 are controlled so that the discharge current (or discharge power) is limited. Thereby, overdischarge of each battery cell 10 is prevented.

On the other hand, when the battery system group 711 is charged, AC power supplied from another power system is AC / DC (AC / DC) converted by the DC / AC inverter 722, and further DC / DC (DC) is converted by the DC / DC converter 721. / DC) converted. When power is supplied from the DC / DC converter 721 to the battery system group 711, the plurality of battery cells 10 included in the battery system group 711 are charged.

The system controller 712 performs the following control as an example of control related to charging of the plurality of battery cells 10 included in each battery system 500. When charging the battery system group 711, the system controller 712 determines whether or not to stop charging based on the charge amount of each battery cell 10 given from each battery ECU 101 (see FIG. 21), and based on the determination result. The power converter 720 is controlled. Specifically, when the charge amount of any one of the plurality of battery cells 10 included in the battery system group 711 exceeds a predetermined threshold value, the system controller 712 stops charging. Or the DC / DC converter 721 and the DC / AC inverter 722 are controlled such that the charging current (or charging power) is limited. Thereby, overcharge of each battery cell 10 is prevented.

(2) Effects of the eighth embodiment (2-1)
As described above, power supply device 700 according to the present embodiment is provided with battery system 500 of any of FIGS. The battery system 500 is provided with a battery module according to any one of the first to sixth embodiments. Thereby, the assembly work of the power supply apparatus 700 becomes easy, and the manufacturing cost can be sufficiently reduced. In addition, maintenance of the power supply device 700 is facilitated.

(2-2)
In the present embodiment, the system controller 712 is an example of a system control unit.

A power storage device according to still another embodiment of the present invention includes the above-described battery system and a system control unit that performs control related to charging or discharging of a battery module of the battery system.

In the power storage device, control related to charging or discharging of the battery module is performed by the system control unit. Thereby, deterioration, overdischarge, and overcharge of the battery module can be prevented.

Since the above battery system is used for the power storage device, the wiring structure of the battery module is simplified and the wiring work is facilitated. As a result, the assembly work of the power storage device is facilitated, and the manufacturing cost can be sufficiently reduced. In addition, maintenance of the power storage device is facilitated.

A power supply device according to still another embodiment of the present invention is connectable to the outside, and is controlled by the above-described power storage device and a system control unit of the power storage device, and a battery module of the battery system of the power storage device And a power conversion device that performs power conversion with the outside.

In the power supply device, power conversion is performed between the battery module and the outside by the power conversion device. Control related to charging or discharging of the battery module is performed by controlling the power conversion device by the system control unit of the power storage device. Thereby, deterioration, overdischarge, and overcharge of the battery module can be prevented.

Since the above battery system is used for the power supply device, the wiring structure of the battery module is simplified and the wiring work is facilitated. As a result, the assembly work of the power supply device is facilitated, and the manufacturing cost can be sufficiently reduced. In addition, maintenance of the power supply device is facilitated.

(3) Modification of Power Supply Device In the power supply device 700 of FIG. 28, the system controller 712 may have the same function as that of the battery ECU 101 instead of the battery ECU 101 provided in each battery system 500.

As long as power can be supplied between the power supply apparatus 700 and the outside, the power conversion apparatus 720 may include only one of the DC / DC converter 721 and the DC / AC inverter 722. Further, the power conversion device 720 may not be provided as long as power can be supplied between the power supply device 700 and the outside.

28, a plurality of battery systems 500 are provided, but not limited to this, only one battery system 500 may be provided.

[10] Other Embodiments (1) In the above embodiment, a shunt resistor is connected in series to the plurality of battery cells 10, and current detection for detecting the current flowing through the battery module 100 on the printed circuit board 21. A circuit may be implemented. For example, when one bus bar 40 is used as a shunt resistor, one bus bar 40 and a current detection circuit are connected via a conductor line. In the current detection circuit, for example, the voltage across the shunt resistor is converted into a digital value by an A / D converter. The converted digital value is divided by the resistance value of the shunt resistor. Thereby, the value of the current flowing through the battery module 100 is calculated. In this example, the conductor line that connects the shunt resistor and the current detection circuit is formed on one of the two FPC boards 50 of the first, second, fourth, fifth, and sixth embodiments. The Or the wiring containing the conductor wire which connects a shunt resistance and a current detection circuit is hold | maintained at the several guide hook g of 3rd Embodiment.

(2) On the printed circuit board 21, an equalization circuit for equalizing the plurality of battery cells 10 may be mounted. The equalization circuit is provided so as to correspond to each of the plurality of battery cells 10. Each equalizing circuit is constituted by, for example, a series circuit of a resistor and a switching element or a charger. In this case, for example, the battery ECU 101 in FIG. 21 controls the switching elements or chargers of the plurality of equalization circuits. Thereby, the equalization process which adjusts the charge condition of the some battery cell 10 is performed.

The state of charge includes terminal voltage, SOC (charge rate), remaining capacity, open circuit voltage, depth of discharge, integrated current value, or difference in charged amount. In the above embodiment, the charge state of the plurality of battery cells 10 is the terminal voltage of the plurality of battery cells 10.

(3) In the above embodiment, the battery cell 10 having a flat and substantially rectangular parallelepiped shape is used as the battery cell constituting the battery module. Not only this but the battery cell 10 which comprises the battery module 100 can also use a laminate-type battery cell.

The laminate type battery cell is manufactured as follows, for example. First, an element in which a plus electrode and a minus electrode are arranged with a separator interposed therebetween is accommodated in a bag made of a resin film. Subsequently, the bag in which the element is accommodated is sealed, and the electrolytic solution is injected into the formed sealed space. Thereby, a laminate-type battery cell is completed.

Furthermore, as the battery cell 10 constituting the battery module 100, a battery cell having a substantially cylindrical shape can be used.

(4) In the above embodiment, the relay member 41 has a structure in which nickel plating is applied to the surface of tough pitch copper, but the relay member 41 may be configured by a harness, a lead wire, or the like. Even in this case, the relay member 41 is preferably arranged so as not to overlap the plurality of

conductor lines

51 and 52 or the wiring 53 that connect the

electrodes

10 a and 10 b of the plurality of battery cells 10 and the voltage detection circuit 20. .

When the relay member 41 is configured by a harness, a lead wire, or the like, the relay member 41 is relayed to the upper surface, one side surface, or the other side surface of the battery block 10BB so that the relay member 41 does not overlap the plurality of

conductor wires

51, 52 or the wiring 53. A guide hook g (FIG. 13) for fixing the member 41 may be provided.

(5) In the fourth and fifth embodiments, the battery module 100 is housed in the casing CA, but is not limited thereto. The battery module 100 may not be stored in the casing CA. Even in this case, the gas duct GD and the wiring member 70 are integrally provided on the lid member 80. Therefore, the wiring member 70, the gas duct GD, and the lid member 80 can be handled integrally. As a result, the battery module 100 can be easily assembled by attaching the lid member 80 to the battery block 10BB.

Moreover, it becomes easy to connect the bus bars 40 and 40x and the

electrodes

10a and 10b of the battery cell 10 by welding or screws. Further, the connection between the conductor lines 51 and 52 of the FPC board 50 and the bus bars 40 and 40a can be performed without complicating the wiring.

(6) A moving body such as the electric automobile 600 (FIG. 27) or a ship according to the above embodiment is an electric device including the battery system 500 and the motor 602 as a load. The electric device according to the present invention is not limited to a moving body such as the electric automobile 600 and a ship, and may be a washing machine, a refrigerator, an air conditioner, or the like. For example, a washing machine is an electric device including a motor as a load, and a refrigerator or an air conditioner is an electric device including a compressor as a load.

As described above, the electrical device according to the present embodiment includes the battery system described above and a load driven by electric power from the battery system. In this electric device, the load is driven by electric power from the battery system.

Since the above battery system is used for this electrical device, the wiring structure of the battery module is simplified and the wiring work is facilitated. As a result, the assembling work of the electric equipment is facilitated, and the manufacturing cost can be sufficiently reduced. In addition, maintenance of the electric equipment is facilitated.

[11] Correspondence relationship between each constituent element of claim and each part of embodiment The following describes an example of the correspondence between each constituent element of the claim and each part of the embodiment. It is not limited.

In the above embodiment, the battery module 100 is an example of a battery module, the X direction is an example of the first direction, the plurality of battery cells 10 are examples of a plurality of battery cells, and the first and second The battery cell 10 (first battery cell 10) adjacent to one end face frame 92 in the embodiment and the one end side battery cell 10 in the third embodiment are examples of battery cells positioned at one end, Of the pair of end face frames 92 in the first, second, fourth, fifth and sixth embodiments, one end face frame 92 and the end face frame 92 in the third embodiment are examples of holding members, The battery block 10BB is an example of a battery block, and the relay terminal CT is an example of a relay terminal.

Further, the voltage detection circuit 20 is an example of a voltage detection circuit, the positive electrodes 10a and the negative electrodes 10b of the plurality of battery cells 10 are examples of a plurality of power supply terminals, and the first, second, fourth, fifth, and The plurality of

conductor lines

51, 52 formed on the two

FPC boards

50, 50a, 50b in the sixth embodiment and the plurality of wirings 53 in the third embodiment are examples of wiring, and the relay member 41 The bus bar 40p connected to the plus electrode 10a of the battery cell 10 adjacent to one end face frame 92 of FIG. 10, the bus bar 40q connected to the one end side battery cell 10 of FIG. 13, and the bus bar 40x of FIGS. It is an example of the 1st connection member.

Furthermore, the two notches 92g in the first, fourth, fifth and sixth embodiments, the rib members GL1, GL2 and the mounting pieces 42p of the plurality of bus bars 40p in the second embodiment, the third embodiment The two guide hooks g formed on the end face frame 92 in the form of the above, and the FPC fitting portion 84 of the lid member 80 and the plurality of mounting pieces 42 of the plurality of bus bars 40, 40x in the fourth and fifth embodiments, 46 is an example of the guide unit, the upper surface of the battery block 10BB is an example of one surface of the battery block, the first terminal row TL1 is an example of the first terminal row, and the second terminal row TL2 is the second side. It is an example of a terminal row.

The plurality of

conductor lines

51 and 52 formed on one

FPC board

50 and 50a in the first, second, fourth, fifth and sixth embodiments and the first in the third embodiment. The wiring group 53x is an example of a first wiring group, and a plurality of conductor lines 51, formed on the

other FPC boards

50, 50b in the first, second, fourth, fifth and sixth embodiments. 52 and the second wiring group 53y in the third embodiment are examples of the second wiring group, and the Y direction is an example of the second direction.

Furthermore, one notch 92g in the first, fourth, fifth and sixth embodiments and one guide hook g formed in the end face frame 92 in the third embodiment are provided in the first guide portion. For example, the other notch 92g in the first, fourth, fifth and sixth embodiments and the other guide hook g formed in the end face frame 92 in the third embodiment are the second guide. It is an example of a part.

Further, the plurality of mounting pieces 42p of the plurality of bus bars 40p arranged along the rib member GL1 and the first terminal row TL1 in the second embodiment is an example of the first guide portion, and the second embodiment. The plurality of mounting pieces 42p of the plurality of bus bars 40p arranged along the rib member GL2 and the second terminal row TL2 in the form of is a second guide part.

Furthermore, the plurality of mounting pieces 42 of the plurality of bus bars 40 connected to one notch 92g, one FPC fitting portion 84 of the lid member 80, and the first terminal row TL1 in the fourth and fifth embodiments. Is an example of the first guide part, and a plurality of parts connected to the other notch 92g, the other FPC fitting part 84 of the lid member 80, and the second terminal row TL2 in the fourth and fifth embodiments. The plurality of mounting

pieces

42 and 46 of the bus bars 40 and 40x are examples of the second guide portion.

Further, the battery system 500 is an example of a battery system, the electric automobile 600 is an example of an electric vehicle, the

battery modules

100a and 100d in FIGS. 23, 24, and 26 are examples of a first battery module. 23, 24 and 26 are examples of the second battery module, and the power supply lines D01 and D02 in FIGS. 23 and 26 and the bus bars D03 and D04 in FIG. 24 are the second connection members. For example, the power conversion unit 601 and the motor 602 are examples of external devices, the contactor 102 and the service plug 530 are examples of switching devices, the motor 602 is an example of a motor, and the drive wheels 603 are examples of drive wheels. It is.

Further, the vehicle body 610, the ship hull, the aircraft fuselage, the elevator cage or the body of the walking robot are examples of the moving main body, and the motor 602, the drive wheel 603, the screw, the propeller, the hoisting motor of the lifting rope or the walking A robot foot is an example of a power source. An electric vehicle 600, a ship, an aircraft, an elevator, or a walking robot are examples of moving objects. The system controller 712 is an example of a system control unit, the power storage device 710 is an example of a power storage device, the power supply device 700 is an example of a power supply device, and the power conversion device 720 is an example of a power conversion device.

As the constituent elements of the claims, various other elements having configurations or functions described in the claims can be used.

Claims

A battery block including a plurality of battery cells;
A voltage detection circuit for detecting the voltage of each battery cell;
A holding member for holding the voltage detection circuit;
A relay terminal provided on the holding member and electrically connected to any electrode terminal of the plurality of battery cells;
A plurality of wires connecting the plurality of electrode terminals of the plurality of battery cells and the voltage detection circuit;
The battery module, wherein the relay terminal and the plurality of wires are arranged so as not to overlap each other on the holding member.
The plurality of battery cells are arranged in a first direction,
The holding member is provided adjacent to a battery cell located at one end of the plurality of battery cells,
The electrode terminal of the battery cell located at the one end and the relay terminal are connected via a first connecting member,
The battery module according to claim 1, wherein the first connection member and the plurality of wirings are arranged so as not to overlap each other.
The battery module according to claim 2, further comprising a guide portion that guides the plurality of wirings from a plurality of electrode terminals of the plurality of battery cells to the voltage detection circuit.
The battery block has one surface where a plurality of electrode terminals of the plurality of battery cells are arranged,
The plurality of electrode terminals of the plurality of battery cells constitute first and second terminal rows arranged in parallel with each other along the first direction on the one surface,
The plurality of wirings include first and second wiring groups extending in the first direction outside the first and second terminal rows on the one surface,
The guide part includes a first guide part and a second guide part provided so as to be arranged in a second direction intersecting the first direction and guiding the first and second wiring groups, respectively.
The battery module according to claim 3, wherein the relay terminal is provided between the first guide portion and the second guide portion.
The battery block has one surface where a plurality of electrode terminals of the plurality of battery cells are arranged,
The plurality of electrode terminals of the plurality of battery cells constitute first and second terminal rows arranged in parallel with each other along the first direction on the one surface,
The plurality of wirings include first and second wiring groups extending in the first direction on the one surface and inside the first and second terminal rows,
The guide part includes a first guide part and a second guide part provided so as to be arranged in a second direction intersecting the first direction and guiding the first and second wiring groups, respectively.
The battery module according to claim 3, wherein the relay terminal is provided outside one of the first and second guide portions.
One or more battery modules,
The battery system according to claim 1, wherein at least one of the one or more battery modules is the battery module according to claim 1.
Can be connected to an external device,
A first battery module comprising the battery module according to claim 1;
A second battery module including a plurality of battery cells;
A second connecting member that electrically connects an electrode terminal of one battery cell of the first battery module and an electrode terminal of one battery cell of the second battery module;
An opening / closing device for opening and closing an electrical connection between the external device and the first and second battery modules;
The battery system, wherein the relay terminal of the first battery module is connected to the switchgear.
The battery system according to claim 6 or 7,
A motor driven by power from the battery system;
An electric vehicle comprising drive wheels that are rotated by the rotational force of the motor.
The battery system according to claim 6 or 7,
A moving body,
A power source that converts electric power from the battery system into power for moving the moving main body;
A moving body comprising: a drive unit that moves the moving main body unit by power converted by the power source.
The battery system according to claim 6 or 7,
A power storage device comprising: a system control unit that performs control related to charging or discharging of the battery module of the battery system.
Can be connected to the outside,
The power storage device according to claim 10;
A power supply device comprising: a power conversion device that is controlled by the system control unit of the power storage device and performs power conversion between the battery module of the battery system of the power storage device and the outside.
The battery system according to claim 6 or 7,
An electric device comprising a load driven by electric power from the battery system.