JP6808283B2 - Batteries - Google Patents

Description

The present invention relates to an assembled battery.

Conventionally, an assembled battery in which a plurality of batteries are housed in a member such as a housing is known. For example, Patent Document 1 discloses a battery pack in which an insulating sheet is provided between both battery cells in order to ensure the insulating property between the two stacked battery cells.

JP-A-2015-060690

However, Patent Document 1 does not consider a configuration in which the insulating sheet housed in the housing is visible from the outside of the housing. Generally, when an insulating sheet is interposed between battery cells, it is desirable to be able to confirm from the outside whether or not the insulating sheet is arranged at an accurate position in the housing in order to ensure the insulating property between the cells.

An object of the present invention made in view of such a viewpoint is to provide an assembled battery capable of confirming the arrangement of the insulating sheet in the housing from the outside of the housing.

In order to solve the above problem, the assembled battery according to the first viewpoint is
With multiple battery cells
A cell holder that holds the plurality of battery cells and
An insulating sheet arranged between one adjacent battery cell and another battery cell among the plurality of battery cells,
With
The cell holder is at a position corresponding to the arranged the insulating sheet between the adjacent said one battery cell the other cells, have a hole portion communicating with the outside and the inside,
The hole penetrates the exposed surface where the electrode terminal of the battery cell is exposed, and a part of the insulating sheet is made visible from the outside .

According to the assembled battery according to the embodiment of the present invention, the arrangement of the insulating sheet in the housing can be confirmed from the outside of the housing.

It is external perspective view of the assembled battery which concerns on one Embodiment. It is a functional block diagram which shows the outline of the power-source system including the assembled battery of FIG. It is a figure which shows the arrangement of the battery cell accommodated in the assembled battery of FIG. It is a perspective view which shows the state which the battery cell of FIG. 3 is housed in a lower case and a cell holder. It is a figure which shows the structure of the inter-cell bus bar. It is an enlarged front view which shows the state which the battery cell of FIG. 3 is housed in a lower case and a cell holder. FIG. 4 is a sectional view taken along the line AA of FIG. FIG. 4 is a cross-sectional view taken along the line BB of FIG. It is a front view of the assembled battery which attached the sensor board. It is an enlarged cross-sectional view which focused on only one inter-cell bus bar in the cross section along the CC arrow line of FIG. It is a figure which shows the assembled battery which attached the BAT case and the auxiliary machine pedestal 200. It is a figure which shows the assembled battery which attached the relay, the MOS board, and the BMS board. It is a figure which shows the structure of a BMS substrate. It is an exploded perspective view of the assembled battery of FIG. FIG. 11 is a view of the assembled battery of FIG. 11 as viewed from the side of the first side surface. It is a figure which looked at the assembled battery of FIG. 11 from the back side.

Hereinafter, an embodiment according to the present disclosure will be described with reference to the drawings. The drawings are schematic. The dimensions or ratios on the drawings do not always match the actual ones. The depiction of each component in each drawing may be partially simplified.

FIG. 1 is an external perspective view of the assembled battery 100 according to the embodiment. The assembled battery 100 includes an upper case 300, a lower case 110, a cell holder 120, a BAT case 500, and a gas discharge pipe 600. The assembled battery 100 has a substantially rectangular parallelepiped shape. The surface facing the positive direction of the X-axis is also referred to as the first side surface of the assembled battery 100. The surface facing the negative direction of the X-axis is also referred to as the second side surface of the assembled battery 100. The surface of the Z-axis facing the positive direction is also referred to as the upper surface of the assembled battery 100. The surface facing the negative direction of the Z axis corresponding to the opposite side of the upper surface is also referred to as the bottom surface of the assembled battery 100. The surface of the Y-axis facing the negative direction is also referred to as the front surface of the assembled battery 100. The surface facing the positive direction of the Y-axis corresponding to the opposite side of the front surface is also referred to as the back surface of the assembled battery 100. The name of each surface of the assembled battery 100 can be applied as a name indicating each surface of the lower case 110, the cell holder 120, and the BAT case 500.

The lower case 110, the cell holder 120, and the BAT case 500 are engaged with each other on the side of the first side surface by the engaging member 180. The lower case 110, the cell holder 120, and the BAT case 500 are also engaged with each other on the side of the second side surface by the engaging member 180. The member in which the lower case 110, the cell holder 120, and the BAT case 500 are engaged is also referred to as a battery case. A battery cell 150 (see FIG. 3), which will be described later, is housed in the battery case.

The lower case 110, the cell holder 120, and the BAT case 500 may be made of, for example, a resin such as PBT (Poly-Butylene Terephthalate).

The upper case 300 has a recess 301 and a recess 302 in a part of the side where the upper surface and the first side surface are connected. The upper case 300 has a recess 303 in a part of the side where the front surface and the upper surface are connected. The assembled battery 100 includes an SSG terminal 250, a LOAD terminal 260, and a GND terminal 270 in the recess 301, the recess 302, and the recess 303, respectively.

The upper case 300 has an opening 304 on the first side surface. The assembled battery 100 includes a connector 310 in the opening 304.

The upper case 300 may be made of, for example, a resin such as PBT (Poly-Butylene Terephthalate).

The gas discharge pipe 600 passes the gas discharged from the battery cell 150 and discharges the gas to the outside of the battery case. The gas discharge pipe 600 may be, for example, a metal tube.

In the present embodiment, it is assumed that the assembled battery 100 is mounted on a vehicle equipped with an internal combustion engine or a vehicle such as a hybrid vehicle capable of traveling by the power of both the internal combustion engine and an electric motor. The assembled battery 100 may be mounted under the seat of the vehicle, for example. The assembled battery 100 may be mounted on the center console of the vehicle, for example. The assembled battery 100 is not limited to the vehicle, and may be used for other purposes.

FIG. 2 is a functional block diagram illustrating an outline of a power supply system 400 including the assembled battery 100 shown in FIG. The power supply system 400 includes an assembled battery 100, an alternator 410, a starter 420, a second secondary battery 430, a load 440, a switch 450, and a control unit 460. The assembled battery 100 includes a first secondary battery 130 housed in the lower case 110. The first secondary battery 130, the alternator 410, the starter 420, the second secondary battery 430, and the load 440 are connected in parallel.

The assembled battery 100 includes a MOSFET 210 (Metal Oxide Semiconductor Field Effect Transistor), a relay 220, and a sensor 230. The assembled battery 100 further includes a fusible link 240, a first secondary battery 130, and a BMS 140 (Battery Management System). The BMS 140 is also referred to as a battery controller. The assembled battery 100 further includes an SSG terminal 250, a LOAD terminal 260, and a GND terminal 270.

The relay 220, the first secondary battery 130, the fusible link 240, and the GND terminal 270 are connected in series in this order. The relay 220 is electrically connected to the MOSFET 210 and the SSG terminal 250. The SSG terminal 250 is electrically connected to the alternator 410. The MOSFET 210 is connected in series to the second secondary battery 430 and the load 440 via the LOAD terminal 260. The GND terminal 270 is grounded.

The sensor 230 is electrically connected to the first secondary battery 130. The BMS 140 is communicably connected to the sensor 230. The BMS 140 is communicably connected to the control unit 460 of the power supply system 400. The BMS 140 is communicably connected to the MOSFET 210, the relay 220, and the sensor 230. The circuit that executes the function of the sensor 230 is mounted on the sensor board 231 (see FIG. 9).

The relay 220 functions as a switching element that connects the first secondary battery 130 in parallel with each component outside the assembled battery 100 in the power supply system 400, or disconnects from each component. Each component of the power supply system 400 outside the assembled battery 100 is also referred to as an external circuit.

The sensor 230 has an appropriate structure and measures the current flowing through the circuit including the first secondary battery 130 or the voltage applied to the circuit including the first secondary battery 130 by an appropriate method.

The fusible link 240 is composed of a fuse body, a housing made of an insulating resin that houses and holds the fuse body, and a cover made of an insulating resin that covers the housing, and blows when an overcurrent occurs.

The first secondary battery 130 is composed of an assembly of battery cells 150 (see FIG. 3). The battery cell 150 constituting the first secondary battery 130 may be a secondary battery such as a lithium ion battery or a nickel hydrogen battery. The first secondary battery 130 is electrically connected to the relay 220 on the positive electrode side. The first secondary battery 130 is electrically connected to the fusible link 240 on the negative electrode side. The fusible link 240 is grounded via the GND terminal 270.

The MOSFET 210 functions as a switching element that connects the second secondary battery 430 and the load 440 in parallel with or disconnects from the other components in the power supply system 400. The assembled battery 100 may not include the MOSFET 210. The MOSFET 210 is mounted on the MOS substrate 212 (see FIG. 12).

The BMS 140 acquires a measurement result such as a current or a voltage of the first secondary battery 130 from the sensor 230. The BMS 140 estimates the state of the first secondary battery 130 based on the measurement result. The BMS 140 estimates, for example, the charge rate of the first secondary battery 130. The charge rate is also called SOC (State Of Charge). The circuit that executes the function of the BMS 140 is mounted on the BMS board 141 (see FIGS. 12 and 13).

The alternator 410 is a generator that is mechanically connected to the engine of the vehicle. The alternator 410 generates electricity by driving an engine. The electric power generated by the alternator 410 by driving the engine may be supplied to the first secondary battery 130, the second secondary battery 430, and the load 440 by adjusting the output voltage by the regulator. The alternator 410 can generate electricity by regeneration when the vehicle is decelerating or the like. The electric power regenerated by the alternator 410 can be used to charge the first secondary battery 130 and the second secondary battery 430.

The starter 420 may include, for example, a starter motor. The starter 420 receives power from at least one of the first secondary battery 130 and the second secondary battery 430 to start the vehicle engine.

The second secondary battery 430 may be composed of, for example, a lead storage battery. The second secondary battery 430 supplies power to the load 440.

The load 440 may include, for example, audio, air conditioner, navigation system, etc. provided in the vehicle. The load 440 operates by consuming the supplied electric power. The load 440 operates by receiving power supply from the first secondary battery 130 while the engine drive is stopped, and operates by receiving power supply from the alternator 410 and the second secondary battery 430 while the engine drive is stopped.

The switch 450 is connected in series with the starter 420. The switch 450 functions as a switching element that connects the starter 420 in parallel with other components or disconnects from the other components.

The control unit 460 controls the overall operation of the power supply system 400. The control unit 460 may be configured by, for example, an ECU (Electric Control Unit or Engine Control Unit) of the vehicle. The control unit 460 is communicably connected to the switch 450 and the BMS 140. The control unit 460 is communicably connected to the MOSFET 210 and the relay 220 via the BMS 140. The control unit 460 controls the operations of the switch 450, the MOSFET 210, and the relay 220, respectively. By controlling each component, the control unit 460 supplies power by the alternator 410, the first secondary battery 130, and the second secondary battery 430, and the first secondary battery 130 and the second secondary battery. The battery 430 is charged.

FIG. 3 is a perspective view showing the arrangement of the battery cells 150 housed in the assembled battery 100. The assembled battery 100 according to the present embodiment accommodates five battery cells 150-1 to 5. The number of battery cells 150 accommodated in the assembled battery 100 is not limited to five. The number of battery cells 150 accommodated in the assembled battery 100 can be appropriately determined according to the maximum output of the battery cells 150, the electric power consumed by the driven device such as a vehicle, and the like.

The battery cell 150 has a substantially rectangular parallelepiped shape having six surfaces. Two of the six faces of the battery cell 150 have a larger area than the other four faces. Of the surfaces of the battery cell 150, two surfaces having a relatively large area are also referred to as flat surfaces. The battery cell 150 is arranged so that the flat surface faces the positive direction and the negative direction of the Z axis. In other words, the battery cell 150 is arranged so that the flat surface is substantially parallel to the upper surface and the bottom surface of the assembled battery 100.

In the assembled battery 100 according to the present embodiment, the battery cells 150 are divided into two stages and three stages and stacked in the Z-axis direction. The battery cells 150 stacked in two stages are arranged on the positive side of the X-axis. The battery cells 150 stacked in three stages are arranged on the negative side of the X-axis. The number of stacked battery cells 150 can be appropriately changed according to the number of battery cells 150 accommodated in the assembled battery 100. An insulating sheet 155 (see FIG. 14) for insulating the battery cells 150 is arranged between the stacked battery cells 150.

The surface of the battery cell 150 on the negative side of the Y-axis is also referred to as a cap surface 151. The battery cell 150 is arranged so that the cap surface 151 faces the front side of the assembled battery 100. The battery cell 150 includes a positive electrode terminal 152, a negative electrode terminal 153, and a safety valve 154 on the cap surface 151. The cap surface 151 has a substantially rectangular shape having a long side and a short side. The positive electrode terminal 152 and the negative electrode terminal 153 are provided near both ends of the cap surface 151 in the long side direction. The positive electrode terminal 152 and the negative electrode terminal 153 are electrodes that output electric power from the battery cell 150. The positive electrode terminal 152 and the negative electrode terminal 153 are also collectively referred to as an electrode terminal.

The safety valve 154 is provided between the positive electrode terminal 152 and the negative electrode terminal 153. The safety valve 154 opens to discharge the gas to the outside when the pressure inside the battery cell 150 exceeds a predetermined pressure due to the gas generated inside the battery cell 150. The pressure inside the battery cell 150 may exceed a predetermined pressure when the battery cell 150 deteriorates over time or when thermal runaway occurs. The predetermined pressure can be appropriately determined according to the specifications of the battery cell 150.

FIG. 4 is a perspective view showing a state in which the battery cell 150 is housed in the lower case 110 and the cell holder 120. The lower case 110 has an engaging hole 115 on the upper surface side. The lower case 110 also has an engaging hole 115 on the side of the bottom surface (not shown). The cell holder 120 has an engaging claw 128 on the upper surface side. The cell holder 120 also has an engaging claw 128 on the side of the bottom surface (not shown). The lower case 110 and the cell holder 120 are engaged with each other by fitting the engaging hole 115 and the engaging claw 128 on the upper surface side and the bottom surface side, respectively.

In FIG. 4, the lower case 110 and the cell holder 120 are configured such that the engaging hole 115 is located outside the engaging claw 128. The lower case 110 and the cell holder 120 may be configured such that the engaging hole 115 is located inside the engaging claw 128. The engaging hole 115 and the engaging claw 128 may be exchanged. That is, the lower case 110 and the cell holder 120 may be configured such that the engaging hole 115 is provided in the cell holder 120 and the engaging claw 128 is provided in the lower case 110.

The assembled battery 100 includes an engaging member 180 on the side of the first side surface. The assembled battery 100 also includes an engaging member 180 on the side of the second side surface (not shown). The lower case 110 and the cell holder 120 each have a convex portion 112 and a convex portion 122 on the side of the first side surface. The lower case 110 and the cell holder 120 also have a convex portion 112 and a convex portion 122 on the side of the second side surface (not shown), respectively. The engaging member 180 engages the lower case 110 and the cell holder 120 by sandwiching the convex portion 112 and the convex portion 122. The engaging member 180 may be an elastic member such as a clip.

The cell holder 120 has an engagement hole 125 on the upper surface side for engaging with the BAT case 500. The cell holder 120 also has an engaging hole 125 on the side of the bottom surface (not shown). Further, the cell holder 120 has a plurality of accommodating portions 129 projecting from the front surface in a substantially cylindrical shape in the negative direction of the Y axis. The number of accommodating portions 129 is the same as the number of electrode terminals of the battery cell 150.

The assembled battery 100 includes an inter-cell bus bar 160-1 to 4, a total positive terminal bus bar 164, and a total negative terminal bus bar 165 on the side of the cell holder 120. The inter-cell bus bars 160-1 to 4 are also collectively referred to as inter-cell bus bars 160. The inter-cell bus bar 160, the total positive terminal bus bar 164, and the total negative terminal bus bar 165 are also collectively referred to as a bus bar. The bus bar is electrically connected to the electrode terminals of the battery cell 150. The bus bar may be welded to the electrode terminals of the battery cell 150. The bus bar may be electrically connected to the electrode terminal of the battery cell 150 by another method such as crimping.

The cell-to-cell bus bar 160 electrically connects the positive electrode terminal 152 of the battery cell 150 and the negative electrode terminal 153 of another battery cell 150. For example, the inter-cell bus bar 160-1 electrically connects the positive electrode terminal 152 of the battery cell 150-1 and the negative electrode terminal 153 of the battery cell 150-2. The inter-cell bus bar 160-4 electrically connects the positive electrode terminal 152 of the battery cell 150-4 and the negative electrode terminal 153 of the battery cell 150-5. The inter-cell bus bars 160-2 and 3 electrically connect the electrode terminals of the battery cell 150 in the same manner as the other inter-cell bus bars 160. The total positive terminal bus bar 164 is electrically connected to the positive electrode terminal 152 of the battery cells 150-5. The total negative terminal bus bar 165 is electrically connected to the negative electrode terminal 153 of the battery cell 150-1. The bus bar connects the battery cells 150 in series between the total positive terminal bus bar 164 and the total negative terminal bus bar 165.

FIG. 5 is a diagram showing the structure of the inter-cell bus bar 160. The inter-cell bus bar 160 includes a convex portion 161, a terminal connecting portion 162, a sensor mounting terminal 163, and an arm portion 163b. The inter-cell bus bar 160 may be made of a conductive metal such as copper or aluminum.

The convex portion 161 of the cell-to-cell bus bar 160 is provided to avoid contact with a structure such as a rib provided on the cell holder 120. The terminal connection portion 162 is electrically connected to the electrode terminal of the battery cell 150. The convex portion 161 is located between the two terminal connecting portions 162. For example, in FIG. 4, when the cell-to-cell bus bar 160-1 is viewed from the positive direction of the X-axis, the convex portion 161 protrudes from the two terminal connecting portions 162 in the negative direction of the Y-axis.

The terminal connection portion 162 has a welding opening 162a. The terminal connection portion 162 is electrically connected to each electrode terminal of the battery cell 150 at the peripheral edge of the welding opening 162a by welding such as bead welding.

The sensor mounting terminal 163 is a terminal on which the sensor board 231 (circuit board, see FIG. 9) is mounted. The sensor mounting terminal 163 has a nut 163a (fixing mechanism). The nut 163a is press-fitted into the through hole formed in the central portion of the sensor mounting terminal 163. The sensor board 231 is attached to the sensor mounting terminal 163 by, for example, a bolt screwed into the nut 163a. The sensor board 231 is electrically connected to the electrode terminals of each battery cell 150.

The arm portion 163b extends in a direction away from the battery cell 150, that is, in the negative direction of the Y axis in FIG. In particular, the arm portion 163b is inclined and extended from the welding surface between the battery cell 150 and the inter-cell bus bar 160. The arm portion 163b has elasticity.

As shown in FIG. 4, the total positive terminal bus bar 164 and the total negative terminal bus bar 165 have an external connection section 166 and a terminal connection section 162 similar to the cell-to-cell bus bar 160. The total positive terminal bus bar 164 and the total negative terminal bus bar 165 may be made of a conductive metal such as copper or aluminum, similarly to the cell-to-cell bus bar 160. The total positive terminal bus bar 164 and the total negative terminal bus bar 165 are electrically connected to the electrode terminals of the battery cell 150 by welding or the like at the peripheral edge of the welding opening 162a of the terminal connection portion 162.

The total positive terminal bus bar 164 and the total negative terminal bus bar 165 are electrically connected to the total positive copper bus bar 285 and the total negative copper bus bar 286 (see FIGS. 11 and 12) by the external connection portion 166, respectively. The total plus copper bus bar 285 and the total minus copper bus bar 286 are also referred to as copper bus bars. The external connection portion 166 has a screw hole 166a. The external connection portion 166 is electrically connected to the copper bus bar by a bolt or the like inserted into the screw hole 166a. The terminal connection portion 162 of the total positive terminal bus bar 164 and the total negative terminal bus bar 165 has a sensor mounting terminal 163 in the same manner as the cell-to-cell bus bar 160. The sensor board 231 is electrically connected to the total positive terminal bus bar 164 and the total negative terminal bus bar 165 via the sensor mounting terminal 163.

As shown in FIG. 4, the assembled battery 100 includes a fastening portion 370 in the lower case 110. The fastening portion 370 is used to attach the auxiliary machine pedestal 200 (see FIG. 11).

As shown in FIG. 4, the assembled battery 100 includes safety valve covers 610 and 611 and a gas tube 620 on the front side. The safety valve covers 610 and 611 may be made of a resin such as PBT. The safety valve covers 610 and 611 are attached to the cap surface 151 so as to cover the safety valve 154 with the seal 630 (see FIG. 14) sandwiched between the safety valve covers 610 and the cap surface 151 of the battery cell 150. The seal 630 may be made of rubber such as EPDM (Ethylene-Propylene-Diene Monomer), for example. The safety valve covers 610 and 611 may be attached to the cell holder 120 by screwing or the like.

The safety valve cover 610 is commonly attached to the safety valve 154 of the battery cells 150-1 to 3 stacked in three stages. The safety valve cover 611 is commonly attached to the safety valve 154 of the battery cells 150-4 to 5 stacked in two stages. The safety valve covers 610 and 611 can hold the gas discharged from the safety valve 154 of the battery cell 150 inside.

The safety valve cover 610 has a gas duct 612 through which the gas discharged from the safety valve 154 passes. The gas duct 612 protrudes from the safety valve cover 610 toward the front surface of the assembled battery 100. The safety valve cover 611 has gas ducts 613 and 614 through which the gas discharged from the safety valve 154 passes. The gas ducts 613 and 614 project from the safety valve cover 611 toward the front surface of the assembled battery 100.

The gas duct 612 of the safety valve cover 610 and the gas duct 613 of the safety valve cover 611 are connected by a gas tube 620 so that gas does not leak. In this case, the gas discharged from the battery cells 150 to 1 to 3 to the safety valve cover 610 can move to the safety valve cover 611.

The gas duct 614 of the safety valve cover 611 is connected to the gas discharge pipe 600 so that the gas does not leak. In this case, the gas moved from the safety valve cover 610 to the safety valve cover 611 and the gas discharged from the battery cells 150-4 to 5 to the safety valve cover 611 can be discharged to the gas discharge pipe 600. When the assembled battery 100 is mounted on a vehicle, the gas discharge pipe 600 discharges gas to, for example, an external space below the vehicle body.

By connecting the safety valve covers 610 and 611 to the gas discharge pipe 600 so that the gas does not leak, the gas is less likely to leak around the assembled battery 100. When the assembled battery 100 is mounted on the vehicle, the gas is discharged to the outside of the vehicle and is less likely to leak into the vehicle. By projecting the gas ducts 612 and 614 toward the front surface of the assembled battery 100, the gas discharged from the battery cell 150 is easily guided toward the gas ducts 612 and 614.

FIG. 6 is an enlarged front view showing a state in which the battery cell 150 of FIG. 3 is housed in the lower case 110 and the cell holder 120. FIG. 7 is a cross-sectional view taken along the line AA of FIG. FIG. 8 is a cross-sectional view taken along the line BB of FIG. FIG. 8A is a diagram showing an example of a BB cross section of FIG. FIG. 8B is a diagram showing an enlarged view of the portion surrounded by the broken line in FIG. 8A and a modified example of the protrusion 156 of the insulating sheet 155. FIG. 6 is an enlarged front view of the negative direction side of the X-axis in which the battery cells 150 stacked in three stages are arranged. In addition, in FIG. 6 and FIG. 7, the safety valve cover 610 and the bus bar are omitted. Hereinafter, the configuration of the cell holder 120 will be described with reference to the negative side of the X-axis with reference to FIG. 6, but the same configuration is also applied to the positive side of the X-axis of the cell holder 120. ..

The cell holder 120 is a hole that communicates the outside and the inside at a position corresponding to the insulating sheet 155 arranged between the adjacent one battery cell 150 and the other battery cell 150 among the plurality of battery cells 150. It has 126a. As an example, as shown in FIG. 6, the hole 126a penetrates the exposed surface where the electrode terminal of the battery cell 150 is exposed, that is, the front surface, and makes a part of the insulating sheet 155 visible from the outside. For example, it is preferable that the holes 126a are formed at least in pairs on the front surface of the cell holder 120 at symmetrical positions corresponding to the positions of the protrusions 156 of the insulating sheet 155 described later. More specifically, the holes 126a are formed in pairs at the ends in the positive and negative directions of the X-axis in the upper half of the front surface of the cell holder 120. Similarly, a pair of hole portions 126a are formed at the end portions in the positive direction and the negative direction of the X-axis in the lower half portion of the front surface of the cell holder 120. That is, in FIG. 6, two pairs of holes 126a are formed on the front side of the cell holder 120 on the negative side of the X-axis. However, the hole 126a may be formed on only one side in the X-axis direction as long as the insulating sheet 155 inside the cell holder 120 is visible. Further, it is preferable that the hole portion 126a is formed at a position where it does not overlap with the bus bar welded to the electrode terminal of the battery cell 150 when visually recognized in the penetrating direction. In the above description, the hole 126a has been described as being formed on the front surface of the cell holder 120, but the present invention is not limited to this. The hole 126a may be formed on any surface of the cell holder 120 and the lower case 110 as long as the arrangement of the insulating sheet 155 inside can be confirmed from the outside of the cell holder 120 and the lower case 110.

In FIG. 7, the battery cells 150 to 1 to 3 are stacked in three stages with the insulating sheet 155 sandwiched between them, and are housed between the lower case 110 and the cell holder 120. The lower case 110 includes a crushable zone 113 having ribs 114 on the positive side of the Y-axis. The battery cell 150 is not housed in the crushable zone 113. The rigidity of the crushable zone 113 can be increased by the ribs 114. The crushable zone 113 has a space other than the rib 114. By doing so, the crushable zone 113 is easily deformed so as to absorb the impact when an impact is applied to the lower case 110 in the negative direction of the Y axis, for example. As a result, the impact on the battery cell 150 can be mitigated. Further, the weight of the lower case 110 can be reduced.

In FIGS. 7 and 8, the insulating sheet 155 is arranged between one adjacent battery cell 150 and the other battery cell 150 among the plurality of battery cells 150. For example, one insulating sheet 155 is sandwiched by the battery cells 150-1 and the battery cells 150-2 in the cell holder 120 along the Z-axis direction. Further, the insulating sheet 155 is arranged in the cell holder 120 so that the respective ends in the X-axis and Y-axis directions and the corresponding inner surface of the cell holder 120 are close to each other or in contact with each other. In particular, the cell holder 120 has ribs 127 formed on the back side of the front surface, and one corresponding outer peripheral edge of the insulating sheet 155 approaches or abuts along the ribs 127. Further, both ends of the rib 127 in the X-axis direction are notched to receive the protrusions 156 of the insulating sheet 155, which will be described later. The sheet thickness of the insulating sheet 155 is determined depending on the size of the gap between the two battery cells 150 in which the insulating sheet 155 is housed and the width of the rib 127.

Further, it is preferable that the insulating sheet 155 has a protrusion 156 protruding from the end of one outer peripheral edge. As shown in FIG. 8A, the protrusion 156 has, for example, a substantially rectangular shape. Further, it is preferable that the protrusions 156 are symmetrically formed in pairs at both ends of one outer peripheral edge of the insulating sheet 155. However, the protrusion 156 may have any shape without being limited to the above. In particular, the protrusion 156 may have a tapered shape as shown in FIG. 8 (b). That is, the protrusion 156 may have a shape that gradually becomes thinner in the negative direction of the Y-axis. Further, the cell holder 120 may have an inviting portion 126b formed on the inner surface so as to correspond to the shape of the protrusion 156. Further, the protrusion 156 may be formed only at one end of one outer peripheral edge of the insulating sheet 155, or may not be formed in the first place.

Since a part of the insulating sheet 155 can be visually recognized from the outside by the configuration of the hole portion 126a and the protrusion 156 as described above, the operator can arrange the insulating sheet 155 in the housing (lower case 110 and cell holder 120). You can check. In particular, by providing the protrusion 156, the visibility of the insulating sheet 155 is improved.

That is, the assembled battery 100 according to the present embodiment makes it possible to confirm whether or not the insulating sheet 155 is housed in the housing. As a result, for example, the operator can confirm the existence of the insulating sheet 155 without opening the cell holder 120 and the lower case 110 even after the assembly of the assembled battery 100 is completed and the product is shipped as a product. it can. Further, the assembled battery 100 makes it possible to confirm whether or not the insulating sheet 155 is arranged at an accurate position in the housing. If the position of the insulating sheet 155 is displaced or inserted at an angle, the appearance of the protrusion 156 visually recognized through the hole 126a changes, so that the operator can easily recognize the state of the insulating sheet 155. it can.

Since the assembled battery 100 is formed at a position where the bus bar and the hole 126a do not overlap each other, even if the bus bar is welded to the electrode terminal of the battery cell 150, the insulating sheet 155 can be visually recognized through the hole 126a. And.

In the assembled battery 100, the protrusion 156 is tapered to form the invitation portion 126b corresponding to the cell holder 120, so that the invitation property of the insulating sheet 155 to the cell holder 120 is improved. As a result, when assembling the insulating sheet 155 to the cell holder 120, the insulating sheet 155 is accurately inserted into the inner part of the cell holder 120. In this way, the assembled battery 100 facilitates the assembly of the insulating sheet 155 to the cell holder 120.

Further, the assembled battery 100 improves the visibility of the protrusion 156 of the internal insulating sheet 155 by providing a notch in the rib 127 of the cell holder 120. Further, in the assembled battery 100, the position of the insulating sheet 155 in the cell holder 120 can be determined by the cutout portion receiving the protrusion 156.

Further, since the arrangement of the pair of protrusions 156 and the corresponding pair of holes 126a is symmetrical, the operator does not need to pay attention to the orientation of the insulating sheet 155 when assembling. As a result, the assembled battery 100 can improve the assembling property.

FIG. 9 is a front view of the assembled battery 100 to which the sensor substrate 231 is attached. The description of the configuration also shown in FIG. 4 will be omitted. The assembled battery 100 includes a sensor substrate 231-1 to 2 and an FPC 232-1 to 2 (Flexible Print Circuit) on the front side. The sensor boards 231-1 to 2 are also referred to as sensor boards 231. FPC2321-2 to 2 are also referred to as FPC232.

The sensor board 231-1 is attached to the sensor mounting terminals 163 of the inter-cell bus bars 160-1 to 3 and the total minus terminal bus bars 165 that are electrically connected to the battery cells 150-1 to 3 stacked in three stages. Attached by 233. The sensor board 231-2 is electrically connected to the sensor mounting terminals 163 of the inter-cell bus bars 160-3 to 4 and the total positive terminal bus bars 164 that are electrically connected to the battery cells 150-4 to 5 stacked in two stages. It is attached by the attachment member 233 so as to be connected. The mounting member 233 may be, for example, a screw or a screw. The FPC232-1 electrically connects the sensor substrate 231-1 and the BMS substrate 141 (see FIGS. 12 and 13). The BMS board 141 includes a circuit that executes the function of the BMS 140 of FIG. The FPC232-2 electrically connects the sensor board 231-1 and the sensor board 231-2.

The sensor board 231 includes a circuit that executes the function of the sensor 230 of FIG. The sensor substrate 231 can measure at least one of the current flowing between the electrode terminals of each battery cell 150 and the voltage between the electrode terminals. The sensor board 231 may measure the current or the voltage according to the measurement instruction from the BMS board 141. The sensor board 231 may output the measurement result to the BMS board 141.

According to the assembled battery 100 according to the present embodiment, as compared with the case where one sensor substrate 231 is attached across the battery cells 150 stacked in three stages and the battery cells 150 stacked in two stages, The stress applied to the sensor substrate 231 can be relaxed. According to the assembled battery 100 according to the present embodiment, the stress applied to the BMS substrate 141 can be relaxed as compared with the case where the BMS substrate 141 is directly attached to the battery cell 150.

FIG. 10 is an enlarged cross-sectional view focusing on only one inter-cell bus bar 160-4 in the cross section along the CC arrow of FIG. One side of the cell-to-cell bus bar 160-4 is welded to the negative electrode terminal 153 of the battery cell 150-5, which is held so as to project from the front surface of the cell holder 120. As described above, the arm portion 163b is inclined in the X-axis direction while extending in the negative direction of the Y-axis from the welded surface of the battery cell 150-5 and the inter-cell bus bar 160-4. The sensor board 231-2 is mounted on the sensor mounting terminal 163 that is continuously formed at the tip of the arm portion 163b. The sensor board 231-2 is fixed to the sensor mounting terminal 163 by a mounting member 233 screwed into the nut 163a. More specifically, the inter-cell bus bar 160-4 fixes the sensor board 231-2 from the back surface side of the sensor mounting terminal 163 by the sensor mounting terminal 163 and the nut 163a. At this time, a part of the nut 163a is accommodated inside the accommodating portion 129 projecting from the front surface of the cell holder 120. Although only the inter-cell bus bar 160-4 is shown here, the inter-cell bus bars 160-1 to 160-3 are also attached to the sensor board 231 in the same manner, and a part of the nut 163a is attached to the cell holder 120. It is housed inside the housing part 129 of.

In such a state, the cell holder 120 and the inter-cell bus bar 160 are separated from each other. More specifically, the back surface of the sensor mounting terminal 163 and the edge portion 129a of the accommodating portion 129 are separated from each other. Similarly, the nut 163a is separated from the edge portion 129a of the accommodating portion 129. That is, the cell holder 120 and the inter-cell bus bar 160 do not come into direct contact with each other.

In the present embodiment, the assembled battery 100 enables the sensor substrate 231 to be fixed according to the dimensional tolerance of the inter-cell bus bar 160. That is, in the assembled battery 100, the inter-cell bus bar 160 is completely separated from the cell holder 120 by providing the inter-cell bus bar 160 itself with a fixing mechanism (nut 163a) for attaching the sensor board 231 to the inter-cell bus bar 160. To do. As a result, a space is formed between the two, and the assembled battery 100 can tolerate the dimensional tolerance of the inter-cell bus bar 160. Further, since the cell holder 120 has the accommodating portion 129, a space for accommodating the nut 163a of the inter-cell bus bar 160 is formed, so that the tolerance of the assembled battery 100 with respect to the dimensions of the inter-cell bus bar 160 becomes larger. .. Further, since the arm portion 163b is tilted and the sensor mounting terminal 163 can be displaced in the X-axis direction and the Y-axis direction, the tolerance of the inter-cell bus bar 160 with respect to the dimensions of the assembled battery 100 is further increased. As described above, the assembled battery 100 facilitates the alignment of the sensor substrate 231.

Further, since the arm portion 163b has elasticity and is inclined, the arm portion 163b can easily absorb stress. This improves the resistance of the intercell bus bar 160 to impact. On the other hand, the accommodating portion 129 regulates excessive elastic deformation of the arm portion 163b. That is, as shown in FIG. 10, when the arm portion 163b is greatly elastically deformed for some reason, the sensor mounting terminal 163 comes into contact with the edge portion 129a of the accommodating portion 129. As a result, the assembled battery 100 prevents the arm portion 163b from being damaged. From the above two points, the reliability of the assembled battery 100 is improved.

Further, since the assembled battery 100 does not need to provide a fixing mechanism (nut 163a) on the cell holder 120 and does not require much strength of the cell holder 120, the thickness of the cell holder 120 can be reduced.

FIG. 11 is a diagram showing an assembled battery 100 to which the BAT case 500 and the auxiliary machine pedestal 200 are attached. The BAT case 500 is engaged with the cell holder 120. The cell holder 120 and the BAT case 500 each have a convex portion 122 and a convex portion 502 on the side of the first side surface. The cell holder 120 and the BAT case 500 also have a convex portion 122 and a convex portion 502 on the side of the second side surface (not shown), respectively. The engaging member 180 engages the cell holder 120 and the BAT case 500 by sandwiching the convex portion 122 and the convex portion 502 on the first side surface and the second side surface.

The BAT case 500 has claws on the upper surface side and the bottom surface side that fit into the engagement holes 125 of the cell holder 120 shown in FIG. The BAT case 500 and the cell holder 120 are also engaged with each other by fitting the engaging hole 125 of the cell holder 120 and the claw of the BAT case 500 on the upper surface and the bottom surface side, respectively. The engagement hole 125 of the cell holder 120 may be located outside the claw of the BAT case 500 or may be located inside. The claw of the BAT case 500 and the engaging hole 125 of the cell holder 120 may be replaced.

When the BAT case 500 is engaged with the cell holder 120, the configuration of the sensor substrate 231 or the like provided on the side of the cap surface 151 of the battery cell 150 is covered by the BAT case 500. The BAT case 500 can alleviate the impact applied to the assembled battery 100 from the front side.

The module formed by engaging the lower case 110, the cell holder 120, and the BAT case 500 is also referred to as a battery module. The battery module has a side in which the battery cells 150 are stacked in three stages and a side in which the battery cells 150 are stacked in two stages. The side in which the battery cells 150 are stacked in three stages is also referred to as a three-stage side. The side in which the battery cells 150 are stacked in two stages is also referred to as a two-stage side. In other words, the battery module has a two-stage side and a three-stage side. The lower case 110, the cell holder 120, and the BAT case 500 have a two-stage side and a three-stage side, similarly to the battery module.

The BAT case 500 is provided with a fusible link 240 on the upper surface on the third stage side. The fusible link 240 is electrically connected to the negative electrode terminal 153 of the battery cell 150-1 at one end via the total minus copper bus bar 286 and the total minus terminal bus bar 165. The fusible link 240 is electrically connected to the GND terminal 270 at the other end via the GND copper bus bar 280.

The lower case 110 has a nut hole 146 for mounting the BMS board 141 and a pin 147 for fitting into the fitting hole 144 (see FIG. 13) provided in the BMS board 141 on the upper surface of the battery module on the third stage side. And. The lower case 110 includes ribs 114 on the back side of the assembled battery 100. The lower case 110 includes a fixing portion 116 on the back side of the assembled battery 100. The assembled battery 100 can be fixed to the vehicle body or the like by fixing the fixing portion 116 with bolts or the like. The lower case 110 includes pillars 117 extending from the fixed portion 116 to the upper surface side. Pillar 117 may be thicker and more rigid than the rest of the lower case 110. Since the pillar 117 has high rigidity, the lower case 110 is less likely to be deformed by an external force applied to the fixing portion 116.

The auxiliary machine pedestal 200 is fastened to the fastening portion 370 with bolts 340. Fastening portions 370 are provided at four locations on the upper surface of the battery module on the second stage side. The size of the assembled battery 100 in the Z-axis direction can be reduced as compared with the case where the fastening portion 370 is provided on the upper surface of the battery module on the third stage side. The number of places where the fastening portion 370 of the auxiliary machine pedestal 200 is provided is not limited to four, and may be three or less, or five or more. The auxiliary machine pedestal 200 can be attached to the battery module more stably by being fastened to the battery module at at least three fastening portions 370.

The auxiliary machine pedestal 200 illustrated in FIG. 11 has a fastening portion 370 provided on the upper surface of the BAT case 500 on the second stage side and a fastening portion 370 provided on the upper surface of the lower case 110 on the second stage side with bolts 340. To be concluded. In other words, the auxiliary machine pedestal 200 illustrated in FIG. 11 is fastened over the entire battery module. When the auxiliary machine pedestal 200 is fastened over the entire battery module, the rigidity of the battery module can be increased as compared with the case where the auxiliary machine pedestal 200 is fastened only to the lower case 110, for example.

The rigidity of the battery module can be increased by regulating the relative displacement between the lower case 110, the cell holder 120 and the BAT case 500. When the auxiliary pedestal 200 is fastened across the entire battery module, the relative displacement between the lower case 110, the cell holder 120 and the BAT case 500 can be regulated. The auxiliary pedestal 200 is not only fastened across the battery module, but also fastened to the battery module so that the relative displacement between the lower case 110, the cell holder 120 and the BAT case 500 is regulated. Good. The auxiliary machine pedestal 200 may be fastened to at least one place of the upper case 300, for example. When the upper case 300 is assembled to the outside of the battery module, the relative displacement of each component of the battery module can be regulated by fastening at least one of the auxiliary pedestal 200 and the upper case 300.

The auxiliary machine pedestal 200 includes a relay fastening portion 360 for attaching the relay 220. The number of relay fastening portions 360 is not limited to the three illustrated in FIG. 11, and may be two or less, or four or more. The thickness of the portion of the auxiliary machine pedestal 200 provided with the relay fastening portion 360 may be thicker than the thickness of other parts of the auxiliary machine pedestal 200. By doing so, the rigidity of the portion to which the relay 220 is attached can be increased. In addition, the vibration caused by the operation of the relay 220 is less likely to propagate to the surroundings.

FIG. 12 is a diagram showing an assembled battery 100 to which a relay 220, a MOS substrate 212, and a BMS substrate 141 are attached. The description of the configuration also shown in FIG. 11 will be omitted.

The MOS substrate 212 mounts the MOSFET 210. The MOS board 212 is attached to the auxiliary machine pedestal 200. The MOS substrate 212 is electrically connected to the LOAD terminal 260 via the LOAD copper bus bar 282.

The relay 220 is fastened to the relay fastening portion 360 (see FIG. 11) provided on the auxiliary machine pedestal 200 with bolts 350. The number of places where the relay 220 is fastened is not limited to three, and may be two or less, or four or more. When the relay 220 is fastened to the auxiliary machine pedestal 200 at at least three places, the relay 220 can be attached to the auxiliary machine pedestal 200 more stably.

At one end, the relay 220 is electrically connected to the positive electrode terminal 152 of the battery cells 150-5 via the total plus copper bus bar 285 and the total plus terminal bus bar 164. At the other end, the relay 220 is electrically connected to the SSG terminal 250 and the MOS substrate 212 via the SSG copper bus bar 281.

FIG. 13 is a diagram showing the configuration of the BMS substrate 141. The BMS board 141 includes a circuit component 142, a mounting hole 143, and a fitting hole 144. At least some of the circuit components 142 correspond to circuits that perform the functions of the BMS 140. A nut hole 146 and a pin 147 are provided on the upper surface of the lower case 110 on the third stage side. The BMS substrate 141 is attached to the nut hole 146 by the attachment member 145 so that the pin 147 and the fitting hole 144 are fitted. The mounting member 145 may be, for example, a screw or a screw. By fitting the pin 147 and the fitting hole 144, the accuracy of attaching the BMS substrate 141 to the battery module can be improved. In addition, the BMS board 141 can be easily attached to the battery module.

The BMS board 141 is communicably connected to the sensor board 231 by the FPC 232-1. The BMS board 141 is communicably connected to the MOS board 212 by the MOS cable 312. The BMS board 141 is communicably connected to the connector 310 by the connector cable 314. The BMS board 141 can be communicably connected to the control unit 460 of the power supply system 400 via the connector 310. The BMS board 141 is not limited to the control unit 460, and may be communicably connected to another device.

A module composed of an auxiliary machine pedestal 200, a relay 220, a MOS board 212, and a BMS board 141 is also referred to as an auxiliary machine module.

FIG. 14 is an exploded perspective view of the assembled battery 100 shown in FIG. The battery module may be assembled as follows. The battery cells 150 are stacked in three stages and two stages with an insulating sheet 155 sandwiched between them, and are housed between the lower case 110 and the cell holder 120. The lower case 110 and the cell holder 120 are engaged by the engaging member 180. A bus bar is attached to the electrode terminal of the battery cell 150. Safety valve covers 610 and 611 are attached to the side of the cap surface 151 of the battery cell 150 with the seal 630 interposed therebetween. The safety valve covers 610 and 611 are connected by a gas tube 620. The sensor board 231 is attached to the sensor attachment terminal 163 of the bus bar. The BAT case 500 is engaged with the cell holder 120 by the engaging member 180 so as to cover the side of the cap surface 151 of the battery cell 150. A gas discharge pipe 600 is attached to the gas duct 614 of the safety valve cover 611. A GND copper bus bar 280, a total minus copper bus bar 286, and a fusible link 240 are attached to the upper surface of the BAT case 500.

Auxiliary equipment modules may be assembled as follows. The auxiliary machine pedestal 200 is attached to the upper surface of the battery module on the second stage side with bolts 340. The SSG copper bus bar 281, the LOAD copper bus bar 282, the total plus copper bus bar 285, and the MOS substrate 212 are mounted on the auxiliary machine pedestal 200. The relay 220 is attached to the auxiliary machine pedestal 200 with bolts 350. The BMS board 141 is attached to the upper surface of the battery module on the third stage side. The auxiliary machine pedestal 200 may be attached to the battery module after the relay 220 or the like is attached. If the relay 220, the MOS board 212, or the like is attached to the auxiliary pedestal 200 before the auxiliary pedestal 200 is attached to the battery module, the assembled battery 100 can be more easily assembled.

The upper case 300 is attached so as to cover the whole after the battery module and the auxiliary machine module are combined. The upper case 300 may be engaged with the battery case, for example, by fitting a claw and a hole. The assembled battery 100 can be assembled according to the procedure example described above.

In assembling the battery module, the battery cell 150 may be adhered to the cell holder 120 with an adhesive. The adhesive may be any adhesive capable of adhering the battery cell 150 and the cell holder 120. The adhesive may be, for example, an acrylic adhesive, an epoxy adhesive, or the like. The adhesive may be applied to the cell holder 120. The adhesive may be applied to the portion of the cell holder 120 facing the cap surface 151 of the battery cell 150. The battery cell 150 may be inserted into the cell holder 120 after the adhesive is applied to the cell holder 120.

After the battery cell 150 and the cell holder 120 are adhered to each other, a bus bar may be welded to the electrode terminals of the battery cell 150. When the electrode terminal and the bus bar are welded, high accuracy may be required for the positional relationship between the electrode terminal and the bus bar. In this case, by improving the accuracy of the application position of the adhesive that adheres the battery cell 150 and the cell holder 120, welding between the electrode terminal and the bus bar can be facilitated. Further, the productivity of the battery module can be improved by adhering the battery cell 150 and the cell holder 120 before the bus bar is welded to the battery cell 150.

In the present embodiment, the battery module and the auxiliary machine module can be assembled separately. By doing so, the productivity of the battery module, the auxiliary machine module, and the assembled battery 100 can be improved.

In the present embodiment, the assembled battery 100 includes an SSG terminal 250 and a LOAD terminal 260 on the side of the first side surface, and a GND terminal 270 on the front side. The GND terminal 270 is easily identified by being arranged on a surface different from the surface on which the SSG terminal 250 and the LOAD terminal 260 are arranged. Further, the assembled battery 100 includes a connector 310 on the side of the first side surface. By arranging the GND terminal 270 on a side different from the connector 310, it becomes easy to identify. By doing so, it becomes easy to prevent erroneous wiring when the assembled battery 100 is mounted on the vehicle.

The length of the cable electrically connected to the GND terminal 270 may be configured to be different from the length of the cable electrically connected to the SSG terminal 250 and the LOAD terminal 260. By doing so, it becomes easier to prevent erroneous wiring when the assembled battery 100 is mounted on the vehicle.

FIG. 15 is a view of the assembled battery 100 shown in FIG. 11 as viewed from the side of the first side surface. The assembled battery 100 includes an auxiliary machine pedestal 200 on the two-stage side of the battery module including the lower case 110, the cell holder 120, and the BAT case 500. The two-stage side of the battery module corresponds to the positive side of the X-axis. The auxiliary machine pedestal 200 is fastened to the fastening portion 370. In FIG. 15, the fastening portion 370 is shown by a broken line because it cannot be seen by the auxiliary machine pedestal 200. Four fastening portions 370 are provided at positions corresponding to the bolts 340 shown in FIG. The number of places where the fastening portion 370 is provided may be three or less, or may be five or more. The fastening portion 370 may be provided on the three-stage side of the battery module, or may be provided on another portion.

The battery cells 150-4 and 150-5 are housed in the lower case 110. In FIG. 15, battery cells 150-4 and 150-5 are shown by broken lines because they are not visible in the lower case 110.

The lower case 110 has a cell back plate 118 on the back side of the portion in which the battery cell 150 is housed. The cell back plate 118 is shown by the dashed line because it is not visible on the side of the lower case 110. The lower case 110 has a rib 114 of the crushable zone 113 on the back side of the cell back plate 118.

In FIG. 15, the fastening portion 370 is provided on the rib 114. The fastening portion 370 may be provided on the intersection 114a between the rib 114 and the cell back plate 118. The fastening portion 370 provided above the intersection 114a can fasten the auxiliary machine pedestal 200 with higher rigidity than the fastening portion 370 provided at a point moved in the positive direction of the Y axis from the intersection 114a. The fastening portion 370 may be provided in the vicinity of the intersection 114a. The closer the position where the fastening portion 370 is provided to the intersection 114a, the higher the rigidity of the fastening portion 370 so that the auxiliary machine pedestal 200 can be fastened.

The relay 220 is mounted on the auxiliary machine pedestal 200. The relay 220 may be mounted on the auxiliary machine pedestal 200 on the side closer to the BAT case 500 than the lower case 110. The relay 220 is moved away from the battery cell 150 by being placed on the side closer to the BAT case 500. By doing so, the vibration generated by the operation of the relay 220 is less likely to propagate to the battery cell 150.

FIG. 16 is a view of the assembled battery 100 shown in FIG. 11 as viewed from the back side. The fastening portion 370 is provided on the rib 114. The fastening portion 370 may be provided on the intersection 114b between the rib 114 and the rib 114. The fastening portion 370 provided on the intersection 114b can fasten the auxiliary machine pedestal 200 with higher rigidity than the fastening portion 370 provided at the point moved from the intersection 114b in the positive or negative direction of the X axis. .. The fastening portion 370 may be provided in the vicinity of the intersection 114b. The closer the position where the fastening portion 370 is provided to the intersection 114b, the higher the rigidity of the fastening portion 370, the more the auxiliary machine pedestal 200 can be fastened.

Although one embodiment according to the present disclosure has been described based on various drawings and examples, it should be noted that those skilled in the art can easily make various modifications and modifications based on the present disclosure. Therefore, it should be noted that these modifications and modifications are within the scope of this disclosure. For example, the functions and the like included in each means can be rearranged so as not to be logically inconsistent, and a plurality of means and the like can be combined or divided into one.

100-set battery 110 Lower case 112 Convex part 113 Crumple zone 114 Rib 114a, 114b Intersection 115 Engagement hole 116 Fixed part 117 Pillar 118 Cell back plate 120 Cell holder 122 Convex part 125 Engagement hole 126a Hole part 126b Invitation part 127 Rib 128 Engagement claw 129 Accommodating part 129a Edge part 130 First secondary battery 140 BMS (battery controller)
141 BMS board 142 Circuit parts 143 Mounting hole 144 Fitting hole 145 Mounting member 146 Nut hole 147 pin 150 Battery cell 151 Cap surface 152 Positive terminal 153 Negative terminal 154 Safety valve 155 Insulation sheet 156 Protrusion 160 Cell-to-cell bus bar 161 Convex Part 162a Welding opening 163 Sensor mounting terminal 163a Nut (fixing mechanism)
163b Arm part 164 Total positive terminal bus bar 165 Total negative terminal bus bar 166 External connection 180 Engagement member 200 Auxiliary pedestal 210 MOSFET
212 MOS board 220 Relay 230 Sensor 231 Sensor board (circuit board)
232 FPC
233 Mounting member 240 Fusible link 250 SSG terminal 260 LOAD terminal 270 GND terminal 280 GND Copper bus bar 281 SSG Copper bus bar 282 LOAD Copper bus bar 285 Total plus copper bus bar 286 Total minus copper bus bar 300 Upper case 301, 302, 303 Recessed 310 Connector MOS cable 314 Connector cable 340, 350 volt 360 Relay fastening part 370 Fastening part (auxiliary machine pedestal)
400 Power system 410 Alternator 420 Starter 430 Second rechargeable battery 440 Load 450 Switch 460 Control unit 500 BAT case 502 Convex part 600 Gas discharge pipe 610, 611 Safety valve cover 612, 613, 614 Gas duct 620 Gas tube 630 Seal

Claims (8)

With multiple battery cells
A cell holder that holds the plurality of battery cells and
An insulating sheet arranged between one adjacent battery cell and another battery cell among the plurality of battery cells,
With
The cell holder is at a position corresponding to the arranged the insulating sheet between the adjacent said one battery cell the other cells, have a hole portion communicating with the outside and the inside,
The hole penetrates the exposed surface where the electrode terminal of the battery cell is exposed, and a part of the insulating sheet is made visible from the outside.
Batteries assembled. The part of the insulating sheet is a protrusion.
The assembled battery according to claim 1 . The protrusion is tapered,
The assembled battery according to claim 2 . The cell holder is formed on the inner surface and has a guide portion corresponding to the shape of the protrusion.
The assembled battery according to claim 2 or 3 . A pair of the protrusions are formed at symmetrical positions at the end of the insulating sheet.
The assembled battery according to any one of claims 2 to 4 . A pair of the holes are formed at symmetrical positions corresponding to the positions of the protrusions on the exposed surface of the cell holder.
The assembled battery according to claim 5 . The insulating sheet is arranged on a rib formed on the inner surface of the cell holder.
The rib is notched at a position corresponding to the protrusion.
The assembled battery according to any one of claims 2 to 6 . When visually recognized in the penetrating direction of the hole, the bus bar welded to the electrode terminal of the battery cell and the hole do not overlap.
The assembled battery according to any one of claims 1 to 7 .