JP2018063882A - Battery pack and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery pack capable of reducing a stress applied to a bus bar even when installed in a lateral direction.SOLUTION: A battery pack comprises: a plurality of battery cells 150 each having a cap face 151 on which electrode terminals 152 and 153 are provided, a bottom face 7, a pair of first lateral faces 8a and 8c coupling short sides of the cap face and the bottom surface to each other, and a pair of second lateral faces coupling long sides of the cap surface and the bottom face to each other; a housing 4 that has a plurality of first housing spaces for housing the bottom face side of each battery cell and a plurality of second housing spaces for housing the cap face side of each battery cell, and that holds the plurality of battery cells by stacking them so that the second lateral faces are opposed to each other; an adhesive part 5 that is brought into contact with both of each battery cell and the housing, and that makes each battery cells adhere to the housing; and an inter-cell bus bar 160 that electrically connects the electrode terminals of the plurality of battery cells to one another. The battery pack is installed so that the pair of first lateral faces of the plurality of battery cells is vertically arranged. The adhesive part is arranged in boundary regions A1 and A2 striding over the cap faces and the pair of first lateral faces of the plurality of battery cells.SELECTED DRAWING: Figure 11

Description

  The present invention relates to an assembled battery and a method for manufacturing the assembled battery.

  Conventionally, a battery pack in which a plurality of battery cells are housed in a member such as a housing is known. For example, Patent Document 1 discloses an assembled battery in which a battery cell is accommodated in a housing hole of a block, and the battery cell is bonded to an inner wall of the housing hole with an adhesive. In such an assembled battery having a plurality of battery cells, the electrode terminals provided on a surface of each battery cell are arranged on the same side as the electrode terminals of other battery cells, and the electrode terminals of each battery cell are Have a configuration in which these are electrically connected by inter-cell bus bars.

JP-A-2006-66451

  By the way, as for the assembled battery, the surface on which the electrode terminal of each battery cell is provided faces in the horizontal direction (for example, left-right direction) due to restrictions on the installation location, etc., and each battery cell has another horizontal direction (for example, front-back direction). It may be installed in a state of being stacked (hereinafter, described as “laterally” as appropriate). In such a case, when an external force such as vertical vibration is applied to the assembled battery, each battery cell moves separately in the vertical direction and tends to be displaced from each other in the vertical direction. Stress may be applied to the bus bars connecting each other.

  The objective of this invention made | formed in view of this viewpoint is providing the assembled battery which can reduce the stress applied to a bus bar, and the manufacturing method of an assembled battery even when it is a case where it installs sideways.

In order to solve the above problem, the assembled battery according to the first aspect is:
A cap surface provided with electrode terminals, a bottom surface opposite to the cap surface, a pair of first side surfaces connecting the cap surface and the short sides of the bottom surface, and long sides of the cap surface and the bottom surface A plurality of battery cells having a pair of second side surfaces connecting the two,
Each battery cell has a plurality of first accommodation spaces for accommodating the bottom surface side and a plurality of second accommodation spaces for accommodating the cap surface side, and the second side surfaces of the plurality of battery cells are opposed to each other. A housing for holding in layers;
An adhesive portion that contacts both the battery cells and the housing, and bonds the battery cells to the housing;
An inter-cell bus bar that electrically connects the electrode terminals of the plurality of battery cells, and
The pair of first side surfaces of the plurality of battery cells are installed so as to be arranged vertically,
The bonding portion is disposed in a boundary region straddling the cap surface and the pair of first side surfaces of the plurality of battery cells.

The assembled battery according to the second aspect is
The housing has ribs defining the plurality of second accommodation spaces;
The boundary region in which the adhesive portion is disposed extends over the pair of second side surfaces of the plurality of battery cells.

An assembled battery according to the third aspect is
The bonding portion is also disposed in a boundary region straddling the bottom surface and the pair of first side surfaces of the plurality of battery cells.

The assembled battery according to the fourth aspect is
The bonding portion is also arranged in a central portion in the longitudinal direction of the bottom surface of the plurality of battery cells.

An assembled battery according to the fifth aspect is
Further comprising an insulating sheet disposed between the plurality of battery cells;
The housing has a first frame that partitions the plurality of first housing spaces, and a second frame that partitions the plurality of second housing spaces,
The insulating sheet is interposed between the first frame body and the second frame body and is in contact with the adhesive portion.

Moreover, the manufacturing method of the assembled battery which concerns on a 6th viewpoint is the following.
A cap surface provided with electrode terminals, a bottom surface opposite to the cap surface, a pair of first side surfaces connecting the cap surface and the short sides of the bottom surface, and long sides of the cap surface and the bottom surface A pair of second side surfaces connecting the battery cells, and a method of manufacturing an assembled battery comprising a plurality of battery cells,
In the cell holder that partitions the plurality of second accommodation spaces, an adhesive portion is formed in a boundary region straddling the cap surface and the pair of side surfaces when the plurality of battery cells are accommodated in the plurality of second accommodation spaces. A step of applying an adhesive,
Inserting the plurality of battery cells with the cap surface facing downward into the plurality of second housing spaces defined by the cell holder; and
Covering a lower case that defines a plurality of first housing spaces so that the plurality of battery cells are housed in the plurality of first housing spaces;
After a predetermined time has elapsed, the plurality of battery cells, the lower case, and the cell holder that are assembled together are turned upside down to electrically connect the electrode terminals of the plurality of battery cells that are exposed from the opening of the cell holder. Attaching the inter-cell bus bar,
It is characterized by including.

  ADVANTAGE OF THE INVENTION According to this invention, even if it is a case where it installs sideways, the assembled battery which can reduce the stress concerning a bus bar, and the manufacturing method of an assembled battery can be provided.

It is a disassembled perspective view of the assembled battery which concerns on one Embodiment of this invention. It is an external appearance perspective view which shows the external appearance of the assembled battery shown in FIG. It is a functional block diagram which shows the outline of the power supply system containing the assembled battery shown in FIG. It is the perspective view which extracted and showed the some battery cell of the state accommodated in the housing. It is an external appearance perspective view of the lower case single-piece | unit shown in FIG. It is a top view of the lower case shown in FIG. FIG. 7A is an external perspective view from the upper surface side of the single cell holder shown in FIG. 1, and FIG. 7B is an external perspective view from the bottom surface side of the single cell holder shown in FIG. It is an expansion external appearance perspective view of the bus bar between cells attached to the cell holder shown in FIG. It is a perspective view which shows the installation state at the time of use of the assembled battery shown in FIG. FIG. 10A is a side view showing the installation state when the assembled battery shown in FIG. 1 is used, and FIG. 10B is a side view showing the arrangement of the battery cells in the installation state. FIG. 3 is a diagram (No. 1) illustrating an adhesion position between a battery cell and a housing of the assembled battery illustrated in FIG. 1. FIG. 4 is a diagram (No. 2) illustrating an adhesion position between a battery cell and a housing of the assembled battery illustrated in FIG. 1. It is a figure which shows in order the outline | summary of the assembly process of the battery module of the assembled battery shown in FIG.

  Embodiments of an assembled battery and an assembled battery manufacturing method according to the present invention will be described below with reference to the drawings. In addition, the same code | symbol is attached | subjected to the common site | part and member in each figure.

  FIG. 1 is an exploded perspective view of a battery pack 100 according to an embodiment of the present invention. As shown in FIG. 1, the assembled battery 100 includes a battery module 2, an auxiliary machine module 3, and an upper case 300. The assembled battery 100 is formed by fixing the upper case 300 after assembling the battery module 2 and the auxiliary machine module 3. FIG. 2 is an external perspective view showing an external appearance of the assembled battery 100 assembled. However, FIG. 2 shows a state in which the upper case 300 is removed for convenience of explanation. Hereinafter, for convenience of description, in FIG. 1 to FIG. 8, the side where the battery module 2 and the auxiliary module 3 are located with respect to the upper case 300 of FIG. The side on which the accessory module 3 and the upper case 300 are located is referred to as the “upper” side.

  First, the outline of the power supply system 400 including the assembled battery 100 will be described. FIG. 3 is a functional block diagram showing an outline of a power supply system 400 including the assembled battery 100 shown in FIGS. 1 and 2. In the present embodiment, the assembled battery 100 will be described as being used by being mounted on a vehicle such as a vehicle including an internal combustion engine or a hybrid vehicle capable of traveling with the power of both the internal combustion engine and the electric motor. The use of the assembled battery 100 is not limited to the vehicle described below.

  As shown in FIG. 3, 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 battery module 2. 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 (metal oxide semiconductor field effect transistor) 210, a relay 220, a current sensor 230, a fusible link 240, a first secondary battery 130, and a battery controller (LBC) 140. . Relay 220, current sensor 230, fusible link 240, and first secondary battery 130 are connected in series in this order. MOSFET 210 is connected in series to second secondary battery 430 and load 440.

  In the assembled battery 100, the SSG terminal 250 is connected to the alternator 410, and the LOAD terminal 260 is connected to the load 440. The GND terminal 270 is used for grounding.

  The relay 220 functions as a switch that connects or disconnects the first secondary battery 130 in parallel with each component outside the assembled battery 100 in the power supply system 400.

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

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

  As shown in FIG. 2, the first secondary battery 130 is configured by an assembly of battery cells 150 housed in the battery module 2. Each battery cell 150 constituting the first secondary battery 130 is a secondary battery such as a lithium ion battery or a nickel metal hydride battery. The first secondary battery 130 has a positive electrode side connected to the fusible link 240 and a negative electrode side grounded via a GND terminal 270. In FIG. 2, a housing 4 described later of the battery module 2 is drawn in a transparent state for convenience of explanation.

  MOSFET 210 functions as a switch that connects or disconnects second secondary battery 430 and load 440 in parallel with other components in power supply system 400.

  The LBC 140 is connected to the first secondary battery 130 and estimates the state of the first secondary battery 130. The LBC 140 estimates a state of charge (SOC) of the first secondary battery 130, for example.

  Alternator 410 is a generator and is mechanically connected to the engine of the vehicle. Alternator 410 generates power by driving the engine. The power generated by the alternator 410 by driving the engine can be supplied to the first secondary battery 130, the second secondary battery 430, and the load 440 included in the assembled battery 100 by adjusting the output voltage with a regulator. The alternator 410 can generate power by regeneration when the vehicle is decelerated. The electric power regenerated by the alternator 410 is used to charge the first secondary battery 130 and the second secondary battery 430.

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

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

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

  Switch 450 is connected in series with starter 420. The switch 450 connects or disconnects the starter 420 in parallel with other components.

  The control unit 460 controls the overall operation of the power supply system 400. The control unit 460 is configured by, for example, an ECU (Electronic Control Unit or Engine Control Unit) of the vehicle. The control unit 460 controls the operation of the switch 450, the MOSFET 210, and the relay 220, respectively, and supplies power by the alternator 410, the first secondary battery 130, and the second secondary battery 430, and the first secondary battery 130. The second secondary battery 430 is charged.

  In the assembled battery 100 of this embodiment, the MOSFET 210, the relay 220, the current sensor 230, the fusible link 240, the SSG terminal 250, the LOAD terminal 260, and the GND terminal 270 described above are assembled in the auxiliary machine module 3. Further, in the assembled battery 100 of the present embodiment, the three terminals, the SSG terminal 250, the LOAD terminal 260, and the GND terminal 270 described above, protrude to the outside of the upper case 300 when the upper case 300 is attached.

  Hereinafter, the detail of the assembled battery 100 of this embodiment is demonstrated.

  As shown in FIGS. 1 and 2, the battery module 2 includes a plurality of battery cells 150, a housing 4 that houses the plurality of battery cells 150, and an inter-cell bus bar 160 that electrically connects the battery cells 150. The total positive terminal bus bar 165, the total negative terminal bus bar 164, the bonding portion 5 (see FIG. 11) for bonding the battery cell 150 to the housing 4, the insulating sheet 6 disposed between the battery cells 150, and the LBC 140 And.

  The battery cell 150 has a substantially rectangular parallelepiped shape. The assembled battery 100 according to this embodiment includes a plurality of battery cells 150. Specifically, five battery cells 150 are accommodated in the assembled battery 100 of the present embodiment. However, the number of battery cells 150 that can be accommodated in the assembled battery 100 is not limited to the five shown in the present embodiment, but depends on the maximum output of the battery cells 150 and the power consumed by the driven device such as a vehicle. Can be determined as appropriate.

  FIG. 4 is a perspective view showing five battery cells 150 extracted from the present embodiment in a state of being accommodated in the housing 4. In other words, the five battery cells of the present embodiment are accommodated in the housing 4 in the state shown in FIG. As shown in FIG. 4, each battery cell 150 has a positive electrode terminal 152 and a negative electrode terminal 153 as electrode terminals on one cap surface 151 having a substantially rectangular parallelepiped shape. The cap surface 151 has a rectangular shape having a long side and a short side, and 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. In addition, a safety valve that is opened at the center of the cap surface 151 to discharge gas to the outside when gas is generated inside the battery cell 150 due to aging, thermal runaway, or the like and the pressure inside the battery cell 150 exceeds a predetermined value. 154 is provided.

  As shown in FIG. 4, the plurality of battery cells 150 are arranged in the housing 4 so that the positive electrode terminals 152 and the negative electrode terminals 153 of the battery cells 150 adjacent to each other are arranged in opposite directions.

  Moreover, surfaces other than the cap surface 151 of the battery cell 150 are formed by a uniform plane. Specifically, the bottom surface 7 opposite to the cap surface 151 of the battery cell 150 and the four side surfaces 8a, 8b, 8c, and 8d are each formed by a uniform plane. The side surface 8 a and the side surface 8 c are surfaces opposite to each other, and constitute a pair of first side surfaces that connect the short sides of the cap surface 151 and the bottom surface 7. The side surface 8b and the side surface 8d are surfaces opposite to each other, and constitute a pair of second side surfaces that connect the long sides of the cap surface 151 and the bottom surface 7.

  FIG. 5 is an external perspective view of the lower case 110, and FIG. 6 is a top view of the lower case 110. As shown in FIGS. 5 and 6, the housing 4 includes a plurality of first accommodation spaces 15 that accommodate the bottom surface 7 side of each battery cell 150 and a plurality of second accommodation spaces that accommodate the cap surface 151 side of each battery cell 150. The plurality of battery cells 150 are held in a state of being accommodated in the plurality of first accommodation spaces 15 and the plurality of second accommodation spaces 16. Specifically, the housing 4 of this embodiment includes a lower case 110 that houses the bottom surface 7 side of the battery cell 150, and a cell holder 120 that houses the cap surface 151 side of the battery cell 150. The plurality of first accommodation spaces 15 are provided in the lower case 110, and the plurality of second accommodation spaces 16 are provided in the cell holder 120.

  As shown in FIG. 5, the lower case 110 is a rectangular box-shaped casing having a space 110 a in which the battery cells 150 can be accommodated from above. That is, the lower case 110 has a bottom wall 111 and four side walls 112a, 112b, 112c, and 112d, and has an opening 113 on the opposite side (that is, the upper side) of the bottom wall 111. In the lower case 110, the side walls 112a and 112c face each other, and the side walls 112b and 112d face each other. Hereinafter, when the four side walls 112a, 112b, 112c and 112d are not distinguished, they are collectively referred to as the side walls 112. The height of the side wall 112 is lower than the height of the battery cell 150 accommodated in the lower case 110. Therefore, the battery cell 150 is accommodated in the lower case 110 so that the cap surface 151 (see FIG. 4) protrudes from the opening 113, that is, on the upper surface side.

  The side walls 112b and 112d include an attachment mechanism 114 for attaching the assembled battery 100 to the vehicle on the outer surface of the lower case 110 (that is, the side opposite to the space 110a). The attachment mechanism 114 is appropriately determined in shape and position on the side walls 112b and 112d according to the attachment method with the vehicle.

  Further, the side wall 112 has an engagement hole 115 for engagement with the cell holder 120 on the opening 113 side. In the present embodiment, each side wall 112 has three engagement holes 115 in the center on the opening 113 side and in the vicinity of both ends.

  On the upper surface of the bottom wall 111 that is the inner surface of the lower case 110 (that is, the space 110a side), a rib 116 is provided as a first frame that protrudes upward and extends in a direction perpendicular to the vertical direction. ing. The rib 116 as the first frame body indicates the position of the battery cell 150 to be accommodated and prevents displacement of the battery cell 150 to be accommodated. The ribs 116 are also spacers that maintain a space between the battery cells 150. Note that an insulating sheet 6 described later is disposed in a space between adjacent battery cells 150 formed by the ribs 116.

  The height of the rib 116 as the first frame is lower than the height of the side wall 112. In the present embodiment, as shown in FIG. 6, four ribs 116 are provided at equal intervals in parallel to the side walls 112b and 112d. That is, in the present embodiment, the lower case 110 has five first housing spaces 15 that are partitioned by the side walls 112b, 112d, and the ribs 116, and the bottom surface 7 side of each battery cell 150 is the first It is accommodated in the accommodating space 15. Therefore, the five battery cells 150 of the present embodiment are stacked and arranged from the side wall 112b to the side wall 112d so that the second side surfaces (side surfaces 8b and 8d) face each other. In other words, the five first accommodation spaces 15 of the present embodiment are formed in the vicinity of the bottom wall 111 in the lower case 110.

  Note that the position and size of the rib 116 are appropriately determined according to the shape and quantity of the battery cell 150 accommodated in the lower case 110, and are not limited to the position and size of the present embodiment.

  FIG. 7 is an external perspective view of the cell holder 120. Specifically, FIG. 7A is an external perspective view from the upper surface side of the cell holder 120, and FIG. 7B is from the side opposite to the upper surface side of the cell holder 120 (hereinafter also referred to as “bottom surface side”). FIG.

  The cell holder 120 is attached to the cap surface 151 side of the battery cell 150, that is, the opening 113 side of the lower case 110.

  As shown in FIG. 7, the cell holder 120 has a substantially rectangular shape when viewed from above, an outer peripheral frame 121 having a predetermined height, and a battery cell with the cell holder 120 engaged with the lower case 110 inside the outer peripheral frame 121. And a holding lid 122 that covers and holds 150 from the upper surface side.

  The outer peripheral frame 121 has four side walls 121a, 121b, 121c, and 121d. The four side walls 121a, 121b, 121c and 121d are arranged at positions corresponding to the four side walls 112a, 112b, 112c and 112d of the lower case 110, respectively, in a state where the outer peripheral frame 121 and the lower case 110 are engaged. The

  The outer peripheral frame 121 includes screw hole forming portions 123 having screw holes 123a for fixing the accessory module 3 to the cell holder 120 by screwing at the ends of the side walls 121b and 121d. The outer peripheral frame 121 is formed so as to protrude outward from the side walls 121b and 121d. In the screw hole forming portion 123, the screw hole 123a is formed so that a screw can be inserted from the upper surface side.

  Further, the outer peripheral frame 121 has a bus bar of the auxiliary module 3, more specifically, a total plus copper bus bar 286 and a total minus copper bus bar 285 (see FIG. 2), which will be described later, on the upper end side of the side walls 121b and 121d. Have a screw hole 123b for screwing. The screw holes 123b are preferably provided in the vicinity of an opening 124a to which a total plus terminal bus bar 165 and a total minus terminal bus bar 164 described later are attached.

  Further, as shown in FIG. 7, the outer peripheral frame 121 has an engagement insertion portion 121 e having a predetermined height over the entire circumference. The engagement insertion portion 121e is thinner than other portions of the outer peripheral frame 121. Therefore, on the outer surface of the outer peripheral frame 121, the engagement insertion portion 121 e is recessed from other portions of the outer peripheral frame 121. The engagement insertion portion 121e is inserted into the space 110a in the lower case 110 from the opening 113 of the lower case 110 when the cell holder 120 is engaged with the lower case 110.

  In each of the side walls 121a, 121b, 121c, and 121d, the engagement insertion portion 121e includes three engagement claws 128 in the center and in the vicinity of both ends. The engagement claw 128 is provided at a position corresponding to the engagement hole 115 of the lower case 110. When the cell holder 120 and the lower case 110 are engaged, the engagement claw 128 of the cell holder 120 is fitted into the engagement hole 115 of the lower case 110 to be engaged, whereby the cell holder 120 and the lower case 110 are engaged. Combined. The positions and quantities of the engagement holes 115 and the engagement claws 128 are not limited to the examples shown in the present embodiment, and can be determined as appropriate positions and quantities.

  The outer peripheral frame 121 includes an engagement hole 129a on the upper end side of the side walls 121a and 121c and in the vicinity of the screw hole 123b. The engagement hole 129a is provided so as to protrude outward from the outer peripheral frame 121, and is a substantially rectangular hole in a top view. The engagement hole 129a is used when the cell holder 120 and the accessory module 3 are assembled.

  The outer peripheral frame 121 includes an engagement hole 129b on the upper end side near the center of each of the side walls 121a, 121b, 121c, and 121d. The engagement hole 129b is provided so as to protrude outward from the outer peripheral frame 121, and is a substantially rectangular hole in a top view. The engagement hole 129b is used when the cell holder 120 and the upper case 300 (see FIG. 1) are assembled. Note that the engagement hole 129b is not necessarily provided near the center of each of the side walls 121a, 121b, 121c, and 121d, and may be provided at any position as long as the engagement hole 129b can be engaged with the upper case 300. it can.

  Next, details of the holding lid 122 will be described. The holding lid 122 holds the battery cell 150 accommodated in the lower case 110 from above.

  The holding lid 122 has an opening 124 a at a position corresponding to the positive terminal 152 and the negative terminal 153 of the battery cell 150 when the cell holder 120 and the lower case 110 are engaged. Therefore, in the engaged state between the cell holder 120 and the lower case 110, the positive terminal 152 and the negative terminal 153 of the battery cell 150 are exposed to the upper surface side of the holding lid 122 from the opening 124a.

  In addition, the holding lid 122 has an opening 124 b at a position corresponding to the safety valve 154 of the battery cell 150 when the cell holder 120 and the lower case 110 are engaged. Therefore, in the engaged state between the cell holder 120 and the lower case 110, the gas discharged from the safety valve 154 is discharged from the opening 124b to the outside of the battery cell 150.

  The positive electrode terminal 152 and the negative electrode terminal 153 that are exposed from the opening 124a and aligned in a row are adjacent to each other except for the positive electrode terminal 152 connected to the fusible link 240 and the negative electrode terminal 153 connected to the GND terminal 270. Are electrically connected by the inter-cell bus bar 160.

  The holding lid 122 prevents electrical connection between the bus bars between the inter-cell bus bars 160 attached to the cell holder 120 and between the inter-cell bus bar 160 and the total plus terminal bus bar 165 or the total minus terminal bus bar 164. And a bead 125 for positioning the bus bar. The bead 125 projects to the upper surface side of the holding lid 122.

  Further, as shown in FIG. 7, the holding lid 122 includes a screw hole forming portion 126 for fixing the LBC 140 on the upper surface side. The screw hole forming portion 126 is formed between the opening 124 a and the opening 124 b on the upper surface side of the holding lid 122. That is, in the present embodiment, the holding lid 122 includes ten screw hole forming portions 126. The screw hole forming portion 126 has a substantially cylindrical shape, and a screw hole 126a is provided at the center. The LBC 140 is placed on the upper surface side of the cell holder 120 and is screwed to the cell holder 120 from the upper surface side using the screw holes 126a formed in the screw hole forming portion 126.

  In addition, the bottom surface of the holding lid 122, which is the surface facing the battery cell 150, of the holding lid 122 of the cell holder 120 protrudes downward and serves as a second frame extending in a direction perpendicular to the vertical direction. Ribs 127 are provided. The ribs 127 as the second frame prevent displacement of the accommodated battery cells 150. The rib 127 is also a spacer that maintains a space between the battery cells 150.

  The height of the rib 127 as the second frame body from the bottom surface of the holding lid 122 is lower than the height of the portion of the outer peripheral frame 121 protruding from the bottom surface of the holding lid 122. In the present embodiment, as shown in FIG. 7B, four ribs 127 are provided in parallel with the side walls 121b and 121d at equal intervals. That is, in this embodiment, the cell holder 120 has five second accommodation spaces 16 partitioned by the side wall 121b, the side wall 121d, and the rib 127, and the cap surface 151 side of each battery cell 150 is the second It is accommodated in the accommodating space 16. Therefore, the five battery cells 150 of the present embodiment are arranged so as to be stacked from the side wall 121b to the side wall 121d so that the second side surfaces (side surfaces 8b and 8d) face each other. In other words, the five second accommodation spaces 16 of the present embodiment are formed near the bottom surface of the holding lid 122 of the cell holder 120.

  Here, the rib 127 as the second frame of the cell holder 120 is provided in a direction and position corresponding to the rib 116 as the first frame of the lower case 110 in a state where the cell holder 120 and the lower case 110 are engaged. It is done. More specifically, in a state where the cell holder 120 and the lower case 110 are engaged, the upper end portion of each battery cell 150 is housed in the second housing space 16, and the lower end portion of each battery cell 150. Is housed in the first housing space 15. And the rib 116 as a 1st frame and the rib 127 as a 2nd frame oppose in the up-down direction in the position between the adjacent battery cells 150. FIG. Therefore, the space between the adjacent battery cells 150 formed by the ribs 116 described above is the same as the space between the adjacent battery cells 150 formed by the ribs 127, and this space includes the insulating sheet 6 described later. Is placed.

  Next, a bus bar that electrically connects the plurality of battery cells 150 held by the lower case 110 and the cell holder 120 will be described. FIG. 8 is an enlarged external perspective view of the inter-cell bus bar 160 attached to the cell holder 120. The inter-cell bus bar 160 is made of a conductive metal such as aluminum. The inter-cell bus bar 160 is attached to the cell holder 120, and is connected between the opening 124a (see FIG. 7) in a state of being connected to the positive terminal 152 (see FIG. 4) and the negative terminal 153 (see FIG. 4) of the battery cell 150. The holding lid 122 has a projection 161 for avoiding interference with the frame portion 122a (see FIG. 7). That is, the inter-cell bus bar 160 protrudes from the terminal connection part 162 connecting the two terminal connection parts 162 and the two terminal connection parts 162 connected to the positive electrode terminal 152 and the negative electrode terminal 153 to the upper surface side in a side view. And a convex portion 161.

  For example, as shown in FIG. 8, the terminal connecting portion 162 has a welding opening 162a at the center. The inter-cell bus bar 160 and the later-described total plus terminal bus bar 165 and total minus terminal bus bar 164 are connected to each terminal of the battery cell 150 by bead welding at the periphery of the welding opening 162a.

  Each terminal connection portion 162 has a voltage sensor attachment terminal 163 that protrudes toward the opening 124b (see FIG. 7) when attached to the cell holder 120. Each voltage sensor attachment terminal 163 has a screw hole 163a. In the inter-cell bus bar 160, each voltage sensor mounting terminal 163 forms a screw hole when the terminal connection portion 162 of the inter-cell bus bar 160 is connected to the positive terminal 152 (see FIG. 4) or the negative terminal 153 (see FIG. 4). It is formed so as to be disposed on the portion 126 (see FIG. 7). The screw hole 163a overlaps with the screw hole 126a (see FIG. 7) formed in the screw hole forming portion 126 in a state where the voltage sensor mounting terminal 163 is disposed on the screw hole forming portion 126, and the LBC 140 (see FIG. 1). Thus, the screw hole 126a and the screw hole 163a are screwed together. The voltage sensor attachment terminal 163 is connected to the voltage sensor and used to detect a voltage between the terminals.

  The total positive terminal bus bar 165 (see FIG. 1) is connected to the positive terminal 152 (see FIG. 4) connected to the fusible link 240 (see FIGS. 1 and 2).

  The total minus terminal bus bar 164 (see FIG. 1) is connected to the negative terminal 153 (see FIG. 4) connected to the GND terminal 270 (see FIGS. 1 and 2).

  The total plus terminal bus bar 165 and the total minus terminal bus bar 164 are made of a conductive metal such as aluminum. Each of the total positive terminal bus bar 165 and the total negative terminal bus bar 164 has one terminal connection 162 connected to the positive terminal 152 or the negative terminal 153 of the battery cell 150 (see FIG. 8. The bus bar shown in FIG. 8 is the inter-cell bus bar 160. Therefore, two terminal connection parts 162 are drawn.) And connected to the total plus copper bus bar 286 or the total minus copper bus bar 285 (see FIG. 2) attached to the auxiliary machine base 200 of the auxiliary machine module 3. An external connection portion 166 (see FIG. 1). The external connection portion 166 and the terminal connection portion 162 of the present embodiment protrude above the terminal connection portion 162 and have a U-shaped connecting portion that sandwiches the outer peripheral frame 121 (see FIG. 7) of the cell holder 120 from the upper end side. It is integrally formed via Therefore, the external connection portion 166 is located outside the outer peripheral frame 121. In particular, as shown in FIG. 7, the external connection portion 166 is attached along a bus bar support portion 123 c formed from the inner surface to the outer surface of the outer peripheral frame 121. Moreover, the external connection part 166 (refer FIG. 1) has the insertion hole 166a (refer FIG. 1) in the position corresponding to the screw hole 123b (refer FIG. 7) in the state attached to the outer periphery frame 121 (refer FIG. 7). Have. It should be noted that the terminal connection portions 162 of the total plus terminal bus bar 165 and the total minus terminal bus bar 164 also have voltage sensor mounting terminals 163 (see FIG. 8) protruding toward the opening 124b (see FIG. 7) in the state where they are attached to the cell holder 120. Have.

  The bonding portion 5 (see FIG. 11) contacts both the battery cells 150 and the housing 4, and bonds the battery cells 150 to the housing 4. The adhesion part 5 of this embodiment is comprised by the adhesive agent interposed between each battery cell 150 and the housing 4. FIG. The adhesive as the bonding portion 5 can be any adhesive that can bond the battery cell 150 and the housing 4, and for example, an epoxy-based adhesive can be used. Details of the arrangement of the bonding portion 5 will be described later.

  9 and 10 are diagrams showing an installation state when the assembled battery 100 is used. FIG. 9 is a perspective view of the assembled battery 100, and FIG. 10A is a side view of the assembled battery 100 from the cap surface 151 side. FIG. 10B is a side view from the cap surface 151 side showing the arrangement of the battery cells 150. As shown in FIGS. 9 and 10, the assembled battery 100 of the present embodiment is installed in such an orientation that the first side surfaces 8 a and 8 c of the battery cell 150 are arranged vertically when in use. Hereinafter, the installation direction of such an assembled battery 100 is also referred to as “sideways”.

  FIGS. 11 and 12 are views showing a bonding position between the battery cell 150 and the housing 4, and FIG. 11 is a longitudinal sectional view of the cap surface 151 of the battery cell 150 at the center position in the short direction, FIG. 12 shows a vertical cross-sectional view at the end of the cap surface 151 of the battery cell 150 on the side surface 8a side in the longitudinal direction. In FIGS. 11 and 12, the adhesive as the bonding portion 5 is indicated by hatched portions.

  As shown in FIGS. 11 and 12, each battery cell 150 of the present embodiment is housed in a first housing space 15 whose lower part (right side in FIGS. 11 and 12) is formed in the lower case 110 of the housing 4. In addition, the upper portion (the left side in FIGS. 11 and 12) is bonded to the lower case 110 and the cell holder 120 by the bonding portion 5 in a state where the upper portion (left side in FIGS. 11 and 12) is received in the second receiving space 16 formed in the cell holder 120 of the housing 4 Yes. Specifically, each battery cell 150 of the present embodiment is bonded to the lower case 110 by an adhesive portion 5 interposed between each battery cell 150 and the lower case 110. Further, each battery cell 150 is bonded to the cell holder 120 by an adhesive portion 5 interposed between each battery cell 150 and the cell holder 120.

  More specifically, of the adhesive portions 5, the adhesive portions that contact the cap surface 151 of each battery cell 150 (hereinafter referred to as “first adhesive portion 5 a”) are the positive terminal 152, the negative terminal 153, and the safety valve 154. The cap surface 151 by contacting only the peripheral edge of the cap surface 151 on the first side surface (side surface 8a and side surface 8c) side and interposing between the bottom surface of the holding lid 122 of the cell holder 120. The holding lid 122 is adhered to the bottom surface.

  Further, as shown in FIG. 11, in the bonding portion 5, the bonding portion (hereinafter referred to as “second”) that contacts the ends of the pair of first side surfaces (side surface 8 a and side surface 8 c) of the battery cell 150 on the cap surface 151 side. Is described between the side walls 121a and 121c of the cell holder 120, thereby bonding the first side surfaces 8a and 8c to the side walls 121a and 121c of the cell holder 120.

  Thus, the 1st adhesion part 5a and the 2nd adhesion part 5b are arrange | positioned in the boundary area | region A1 ranging over the cap surface 151 of each battery cell 150, and a pair of 1st side surface (side surface 8a and side surface 8c). That is, each battery cell 150 is supported by the cell holder 120 from the cap surface 151 side and the first side surfaces 8a and 8c side via the adhesive portion 5.

  Also, as shown in FIG. 12, among the bonding portions 5, the bonding portions (hereinafter referred to as “third”) that contact the end portions of the pair of second side surfaces (side surface 8 b and side surface 8 d) of the battery cell 150 on the cap surface 151 side. The adhesive portion 5c ”is interposed between the side surface of the rib 127 as the second frame body of the cell holder 120, thereby bonding the second side surfaces 8b and 8d to the side surface of the rib 127.

  Thus, the boundary region A1 where the bonding portion 5 is disposed also straddles the pair of second side surfaces 8b and 8d of each battery cell 150. That is, each battery cell 150 is supported by the cell holder 120 from the second side surface 8b and 8d side in addition to the cap surface 151 side and the first side surface 8a and 8c side via the adhesive portion 5.

  Further, in the bonding portion 5, the bonding portion that contacts the bottom surface 7 of the battery cell 150 (hereinafter referred to as “fourth bonding portion 5 d”) is in contact with at least a part of the bottom surface 7, and the lower case. The bottom surface 7 is bonded to the top surface of the bottom wall 111 by being interposed between the top surface of the bottom wall 111 of 110. Specifically, as shown in FIG. 11, the fourth bonding portion 5 d is disposed at the end of the bottom surface 7 on the first side surfaces 8 a and 8 c side. Moreover, it is preferable that the 4th adhesion part 5d is arrange | positioned also in the longitudinal direction center part of the bottom face 7, as shown in FIG.

  Further, as shown in FIG. 11, of the bonding portions 5, the bonding portions (hereinafter referred to as “fifth bonding portions 5 e”) that contact the ends of the pair of first side surfaces 8 a and 8 c on the bottom surface 7 side of the battery cell 150. 2) is interposed between the side walls 112a and 112c of the lower case 110, thereby bonding the first side surfaces 8a and 8c to the side walls 112a and 111c of the lower case 110.

  Thus, the 4th adhesion part 5d and the 5th adhesion part 5e are arranged in boundary field A2 ranging over bottom face 7 of each battery cell 150, and a pair of 1st side (side face 8a and side 8c). That is, each battery cell 150 is supported by the lower case 110 from the bottom surface 7 side and the first side surfaces 8a and 8c side via the bonding portion 5.

  Also, as shown in FIG. 12, among the bonding portions 5, bonding portions (hereinafter referred to as “sixth bonding portions 5 f”) that come into contact with the bottom surface 7 side ends of the pair of second side surfaces 8 b and 8 d of the battery cell 150. 2), the second side surfaces 8b and 8d are bonded to the side surface of the rib 116 by being interposed between the side surface of the rib 116 as the first frame body of the lower case 110.

  As described above, the boundary region A2 where the bonding portion 5 is disposed also straddles the pair of second side surfaces 8b and 8d of each battery cell 150. That is, each battery cell 150 is supported by the lower case 110 from the second side surface 8b and 8d side in addition to the bottom surface 7 side and the first side surface 8a and 8c side via the bonding portion 5.

  As shown in FIG. 12, the insulating sheet 6 is disposed between the plurality of battery cells 150. In the present embodiment, the insulating sheet 6 is disposed in each of the four gaps formed between the five battery cells 150. The insulating sheet 6 can suppress a short circuit between the battery cells 150. The insulating sheet 6 can be formed of a resin material such as polyethylene or polypropylene, for example.

  In addition, the insulating sheet 6 is interposed between the rib 116 as the first frame and the rib 127 as the second frame, and is in contact with the adhesive portion 5 described above. Therefore, the position of the insulating sheet 6 is fixed between the rib 116 and the rib 127 by an adhesive as the bonding portion 5. Thereby, it can suppress that the insulating sheet 6 moves between the battery cells 150 by the driving | running | working vibration etc. of the motor vehicle in which the assembled battery 100 is mounted, for example, As a result, generation | occurrence | production of abnormal noise can be suppressed.

  More specifically, the third adhesive portion 5c of the present embodiment extends to the right side of the right end of the rib 127 as the second frame body, and the left end portion of the insulating sheet 6 at a position on the right side of the right end of the rib 127. Is in contact with the third adhesive portion 5c. Further, the sixth adhesive portion 5f of the present embodiment extends to the left side of the left end of the rib 116 as the first frame, and the right end portion of the insulating sheet 6 is the sixth position at the left side of the left end of the rib 116. It is in contact with the adhesion part 5f.

  Note that, as described above, the position of the insulating sheet 6 of the present embodiment is fixed in a state where it is in contact with both the third adhesive portion 5c and the sixth adhesive portion 5f. However, the configuration is not limited to this configuration. For example, the position may be fixed by contacting only one of the third adhesive portion 5c and the sixth adhesive portion 5f.

  As described above, in the assembled battery 100 installed sideways in this manner, the adhesive portion 5 is disposed in the boundary region A1 straddling the cap surface 151 of the battery cell 150 and the pair of first side surfaces 8a and 8c. The battery cell 150 is restrained from moving up and down with respect to the housing 4. Therefore, the stress applied to the inter-cell bus bar 160 connecting the electrode terminals (the positive terminal 152 and the negative terminal 153) of each battery cell 150 can be reduced.

  Moreover, in the assembled battery 100 of this embodiment, boundary area | region A1 in which the adhesion part 5 is arrange | positioned also straddles a pair of 2nd side surfaces 8b and 8d of the battery cell 150 as above-mentioned. Therefore, each battery cell 150 is further restrained from moving in the vertical direction with respect to the housing 4, and the stress applied to the inter-cell bus bar 160 can be further reduced.

  Moreover, in the assembled battery 100 of this embodiment, the adhesion part 5 is arrange | positioned also in the boundary area | region A2 over the bottom face 7 of a battery cell 150, and a pair of 1st side surface 8a and 8c as above-mentioned. Accordingly, each battery cell 150 is restrained from moving with respect to the housing 4 particularly in the shearing direction (the connection direction between the cap surface 151 and the bottom surface 7 of the battery cell 150), and the stress applied to the inter-cell bus bar 160 is further reduced. can do.

  Here, the assembly of the battery module 2 included in the method for manufacturing the assembled battery 100 will be described. FIG. 13 is a diagram showing an outline of the assembly process of the battery module 2 in order.

  FIG. 13A shows a process of applying an adhesive (denoted by reference numeral “5” in FIG. 13A) to the cell holder 120 and the lower case 110 to serve as the adhesive portion 5. When the battery cell 150 is accommodated in the first accommodating space 15 and the second accommodating space 16, the cell holder is formed so that the first adhesive portion 5 a to the sixth adhesive portion 5 f (see FIGS. 11 and 12) described above are formed. An adhesive is applied to predetermined positions of 120 and the lower case 110. In the present embodiment, the direction in which the plurality of battery cells 150 are stacked in the boundary region A1 that spans the bottom surface of the holding lid 122 and the side wall 121a of the cell holder 120 and the boundary region A1 that straddles the bottom surface of the holding lid 122 and the side wall 121c. The adhesive is applied so as to be continuous along. The first adhesive portion 5a, the second adhesive portion 5b, and the third adhesive portion 5c are formed by this adhesive (see FIGS. 11 and 12).

  In addition, a boundary region A2 straddling the bottom wall 111 and the side wall 112a of the lower case 110 and a boundary region A2 straddling the bottom wall 111 and the side wall 112c are continued along the direction in which the plurality of battery cells 150 are stacked. Apply adhesive to With this adhesive, the fourth adhesive portion 5d, the fifth adhesive portion 5e, and the sixth adhesive portion 5f (see FIGS. 11 and 12) are formed. Note that an adhesive may also be applied to an intermediate position between the side wall 112a and the side wall 112c of the bottom wall 111 of the lower case 110 so as to continue along the direction in which the plurality of battery cells 150 are stacked (FIG. 13). (Refer to the broken line part in (a)).

  In the present embodiment, an adhesive is applied to the lower case 110 and the cell holder 120, but an adhesive can also be applied to the battery cell 150 side.

  FIG. 13B shows a process of setting the battery cell 150 in the cell holder 120. In a state where the cell holder 120 is turned upside down, the cap surface 151 of the battery cell 150 is directed downward, and the battery cell 150 according to the rib 127 is placed on the bottom surface side of the holding lid 122 of the cell holder 120 (upper side in the state of FIG. (See the white arrow in FIG. 13B). Thus, the end of the battery cell 150 on the cap surface 151 side is accommodated in the second accommodation space 16 partitioned by the rib 127. Thereby, the 1st adhesion part 5a which adheres battery cell 150 and cell holder 120, the 2nd adhesion part 5b, and the 3rd adhesion part 5c (refer to Drawing 11 and Drawing 12) are formed.

  Here, when the battery cell 150 is fitted into the second accommodation space 16 of the cell holder 120, the adhesive applied in the step shown in FIG. In the state of b), it is applied so as to protrude beyond the upper end) (upward in the state of FIG. 13B).

  FIG. 13C shows a process of inserting the insulating sheet 6 between the battery cells 150. The insulating sheet 6 is inserted between the battery cells 150 until the tip in the insertion direction adheres to the adhesive that extends below the lower end of the rib 127 (see the white arrow in FIG. 13C). The insulating sheet 6 is preferably inserted until the tip in the insertion direction contacts the adhesive and contacts the lower end of the rib 127. Thus, the adhesive applied in the step shown in FIG. 13A can also be used for fixing the insulating sheet 6.

  FIG. 13D shows a process of setting the lower case 110 to the cell holder 120. With the lower case 110 turned upside down, the lower case 110 is engaged with the cell holder 120 so as to cover the cell holder 120 into which the battery cell 150 is inserted (see the white arrow in FIG. 13D). At this time, the engaging claw 128 (see FIG. 7) of the cell holder 120 is engaged with the engaging hole 115 (see FIG. 5) of the lower case 110.

  In the present embodiment, when the lower case 110 is engaged with the cell holder 120, the first storage space 15 in which the end portion on the bottom surface 7 side of the battery cell 150 is partitioned by the rib 116 (see FIG. 6). (Refer to FIG. 6 etc.). Thereby, the 4th adhesion part 5d which adheres battery cell 150 and lower case 110, the 5th adhesion part 5e, and the 6th adhesion part 5f (refer to Drawing 11 and Drawing 12) are formed. The adhesive applied in the step shown in FIG. 13A, which becomes the sixth adhesive portion 5f, when the battery cell 150 is fitted into the first accommodating space 15 of the lower case 110, the upper end of the rib 116 (FIG. 13D). In this state, the coating is applied so as to protrude beyond the lower end) (lower side in the state of FIG. 13D). Therefore, in this embodiment, when the lower case 110 is engaged with the cell holder 120, the adhesive that protrudes above the upper end of the rib 116 contacts the insulating sheet 6. Thereby, the position of the insulating sheet 6 of the present embodiment is fixed not only by the third adhesive portion 5c but also by the sixth adhesive portion 5f.

  With the lower case 110 set on the cell holder 120, the adhesive is dried and left as it is to form the bonded portion 5 for a predetermined time. Thus, by providing the predetermined drying time, it is possible to suppress the occurrence of the inclination of the battery cell 150 with respect to the housing 4 and to reduce the initial stress applied to the welded portions of various bus bars attached in the steps described later.

  FIG. 13E shows a process of attaching the inter-cell bus bar 160, the total plus terminal bus bar 165, and the total minus terminal bus bar 164. After the predetermined time has elapsed after the step shown in FIG. 13D, the battery cell 150, the lower case 110, the cell holder 120, and the insulating sheet 6 assembled together are turned upside down and exposed from the opening 124a of the cell holder 120. The inter-cell bus bar 160, the total plus terminal bus bar 165, and the total minus terminal bus bar 164 are attached to the terminal 152 and the negative electrode terminal 153 by welding (see white arrows in FIG. 13E).

  Next, the assembly of the battery module 2 is completed by attaching the LBC 140 (see FIG. 1) to the holding lid 122. The LBC 140 is attached to the holding lid 122 by, for example, screwing.

  The battery module 2 according to the present embodiment is assembled through the above-described steps, but is not limited to the steps shown here. For example, the battery cell 150 can be placed in the lower case 110 without turning the lower case 110 and the cell holder 120 upside down. The cell holder 120 may be engaged with the lower case 110 from above the space 110a (see FIG. 5).

  As described above, the battery module 2 constituting the assembled battery 100 according to the present embodiment has an adhesive so as to be continuous at a predetermined position of the cell holder 120 and the lower case 110 along the direction in which the plurality of battery cells 150 are stacked. As described above, it is possible to form the bonding portion 5 that reduces the stress applied to the inter-cell bus bar 160.

  Next, the auxiliary machine module 3 of the assembled battery 100 according to the present embodiment will be described. As shown in FIG. 2, the auxiliary equipment module 3 is arranged on the auxiliary equipment base 200, the MOSFET 210, the relay 220, the current sensor 230 and the fusible link 240 arranged on the auxiliary equipment base 200, and the auxiliary equipment base 200. A copper bus bar for electrically connecting the components to be connected.

  As shown in FIG. 2, the copper bus bar of this embodiment includes a copper bus bar 280 that electrically connects the terminal of the fusible link 240 and one terminal of the current sensor 230, and the other terminal of the current sensor 230 and the relay. A copper bus bar 281 that electrically connects one terminal of 220, a copper bus bar 282 that electrically connects the other terminal of relay 220 and the terminal of MOSFET 210, and is electrically connected to this copper bus bar 282; A copper bus bar 283 that electrically connects the other terminal of the relay 220 and the SSG terminal 250 via the copper bus bar 282, a copper bus bar 284 that electrically connects the terminal of the MOSFET 210 and the LOAD terminal 260, and a fusible link A total plus copper bus bar 286 that electrically connects 240 terminals and a total plus terminal bus bar 165 of the battery module 2, and GN The total negative copper bus bar 285 electrically connects the total negative terminal bus bar 164 of the terminal 270 and the battery module 2, in being configured.

  Next, the upper case 300 will be described. As shown in FIG. 1, the upper case 300 has three openings 310a and 310b for exposing the SSG terminal 250, the LOAD terminal 260 and the GND terminal 270 from the upper case 300 when the assembled battery 100 is assembled. And 310c.

  Further, the upper case 300 includes engagement claws 320 for engaging the cell holder 120 on the bottom surfaces of the four side surfaces. The engagement claw 320 is provided at a position corresponding to the engagement hole 129b in a state where the cell holder 120 and the upper case 300 are assembled. The engaging claw 320 extends in the bottom direction from the outside of each side surface, and the front end of the engaging claw 320 has a wedge shape when viewed from the side. When the tip of the engagement claw 320 is fitted into the engagement hole 129b, the engagement claw 320 and the engagement hole 129b are engaged.

  The upper case 300 includes a bus bar protection unit 330 for protecting the total plus copper bus bar 286 and the total minus copper bus bar 285 in a state where the cell holder 120 and the upper case 300 are assembled.

  Next, assembly of the assembled battery 100 as a whole will be described. First, assembly of the battery module 2 and the auxiliary machine module 3 will be described. Assembly of the battery module 2 and the auxiliary machine module 3 is realized by assembling the cell holder 120 and the auxiliary machine base 200. The cell holder 120 and the auxiliary machine base 200 are assembled by fitting the engaging claws 205 into the engaging holes 129a and engaging them (see FIG. 1). In addition, the cell holder 120 and the auxiliary machine base 200 are coupled using the bolts 340 in a state where the auxiliary machine base 200 is placed on the cell holder 120. Specifically, the insertion holes formed in the total plus copper bus bar 286 and the total minus copper bus bar 285 fixed to the auxiliary machine base 200 and the external connection portion 166 of the total plus terminal bus bar 165 and the total minus terminal bus bar 164 are formed. The bolts 340 are screwed together in a state where the insertion holes 166a and the screw holes 123b of the cell holder 120 are in communication with each other. Thereby, the cell holder 120 and the auxiliary machine base 200 can be coupled indirectly via the total plus copper bus bar 286 and the total minus copper bus bar 285.

  As shown in FIG. 1, the cell holder 120 and the auxiliary machine base 200 are formed by inserting a bolt 350 from the upper surface side in a state where the auxiliary machine base 200 is placed on the cell holder 120, and screw holes 123 a of the cell holder 120. The cell holder 120 and the auxiliary machine base 200 are screwed together.

  Next, the upper case 300 is assembled. The upper case 300 is engaged with the cell holder 120 by engaging the engagement claw 320 with the engagement hole 129 b of the cell holder 120. Thus, the assembly of the assembled battery 100 is completed by engaging the upper case 300 with the cell holder 120.

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

  The present invention relates to an assembled battery and a method for manufacturing the assembled battery.

DESCRIPTION OF SYMBOLS 2 Battery module 3 Auxiliary machine module 4 Housing 5 Adhesion part 5a 1st adhesion part 5b 2nd adhesion part 5c 3rd adhesion part 5d 4th adhesion part 5e 5th adhesion part 5f 6th adhesion part 6 Insulation sheet 7 Bottom surface of battery cell 8a, 8c Battery cell first side surface 8b, 8d Battery cell second side surface 9a, 9b Groove 10a, 10b Groove 11a, 11b Housing groove 11a1, 11b1 Groove wall 12a, 12b Opening portion 15 First housing space 16 Second housing Space 100 Battery pack 110 Lower case 110a Space 111 Bottom wall 112, 112a, 112b, 112c, 112d, 121a, 121b, 121c, 121d Side wall 113, 124a, 124b, 310a, 310b, 310c Opening 114 Mounting mechanism 115, 129a, 129b Engagement hole 116 rib (first frame)
120 Cell holder 121 Outer frame 121e Engagement insertion portion 122 Holding lid 122a Frame portion 123, 126 Screw hole forming portion 123a, 123b, 126a, 163a Screw hole 123c Bus bar support portion 125 Bead 127 Rib (second frame)
128, 205, 320 Engagement claw 130 First secondary battery 140 LBC (battery controller)
150 Battery cell 151 Cap surface of battery cell 152 Positive electrode terminal 153 Negative electrode terminal 154 Safety valve 160 Inter-cell bus bar 161 Protruding portion 162 Terminal connection portion 162a Welding opening 163 Voltage sensor mounting terminal 164 Total minus terminal bus bar 165 Total plus terminal bus bar 166 External connection Part 166a Insertion hole 200 Auxiliary machine base 210 MOSFET
220 relay 230 current sensor 240 fusible link 250 SSG terminal 260 LOAD terminal 270 GND terminal 280, 281, 282, 283, 284 copper bus bar 285 total minus copper bus bar 286 total plus copper bus bar 300 upper case 330 bus bar protection unit 340, 350 volts 400 power supply system 410 alternator 420 starter 430 second secondary battery 440 load 450 switch 460 control unit A1, A2 boundary region W groove width

Claims (6)

A cap surface provided with electrode terminals, a bottom surface opposite to the cap surface, a pair of first side surfaces connecting the cap surface and the short sides of the bottom surface, and long sides of the cap surface and the bottom surface A plurality of battery cells having a pair of second side surfaces connecting the two,
Each battery cell has a plurality of first accommodation spaces for accommodating the bottom surface side and a plurality of second accommodation spaces for accommodating the cap surface side, and the second side surfaces of the plurality of battery cells are opposed to each other. A housing for holding in layers;
An adhesive portion that contacts both the battery cells and the housing, and bonds the battery cells to the housing;
An inter-cell bus bar that electrically connects the electrode terminals of the plurality of battery cells, and
The pair of first side surfaces of the plurality of battery cells are installed so as to be arranged vertically,
The adhesion part is an assembled battery arranged in a boundary region straddling the cap surface and the pair of first side surfaces of the plurality of battery cells. The housing has ribs that define the plurality of second accommodation spaces,
2. The assembled battery according to claim 1, wherein the boundary region in which the adhesion portion is disposed also straddles the pair of second side surfaces of the plurality of battery cells.   The assembled battery according to claim 1, wherein the adhesive portion is also disposed in a boundary region straddling the bottom surface and the pair of first side surfaces of the plurality of battery cells.   The assembled battery according to claim 3, wherein the adhesive portion is also arranged in a longitudinal center portion of the bottom surface of the plurality of battery cells. Further comprising an insulating sheet disposed between the plurality of battery cells;
The housing has a first frame that partitions the plurality of first housing spaces, and a second frame that partitions the plurality of second housing spaces,
5. The assembled battery according to claim 1, wherein the insulating sheet is interposed between the first frame body and the second frame body and is in contact with the adhesive portion. 6. A cap surface provided with electrode terminals, a bottom surface opposite to the cap surface, a pair of first side surfaces connecting the cap surface and the short sides of the bottom surface, and long sides of the cap surface and the bottom surface A pair of second side surfaces connecting the battery cells, and a method of manufacturing an assembled battery comprising a plurality of battery cells,
When the plurality of battery cells are accommodated in the plurality of second accommodation spaces, an adhesive portion is provided in a boundary region straddling the cap surface and the pair of first side surfaces in the cell holder that partitions the plurality of second accommodation spaces. Applying an adhesive so as to be formed; and
Inserting the plurality of battery cells with the cap surface facing downward into the plurality of second housing spaces defined by the cell holder; and
Covering a lower case that defines a plurality of first housing spaces so that the plurality of battery cells are housed in the plurality of first housing spaces;
After a predetermined time has elapsed, the plurality of battery cells, the lower case, and the cell holder that are assembled together are turned upside down to electrically connect the electrode terminals of the plurality of battery cells that are exposed from the opening of the cell holder. Attaching the inter-cell bus bar,
A method for producing an assembled battery, comprising: