WO2018117049A1

WO2018117049A1 - Battery pack

Info

Publication number: WO2018117049A1
Application number: PCT/JP2017/045390
Authority: WO
Inventors: 和孝笹本; 律夫鈴木
Original assignee: カルソニックカンセイ株式会社
Priority date: 2016-12-19
Filing date: 2017-12-18
Publication date: 2018-06-28
Also published as: JP2018101497A; JP6324480B1

Abstract

Provided is a battery pack which is capable of reducing the influence of the external environment on an external connection terminal or the like, while efficiently utilizing a space. A battery pack (100) according to one embodiment of the present invention is provided with: an upper case (300); external connection terminals (250) and (260) which are exposed from recesses (301) and (302) that are formed in the outer surface of the upper case (300); a connector (310) which is fitted to the upper case (300) for the purpose of connecting a harness (800); and a protective cover (700) which is fitted to the upper case (300) so as to cover the entire of the external connection terminals (250), (260) and the connector (310).

Description

Assembled battery

Cross-reference to related applications

This application claims the priority of Japanese Patent Application No. 2016-245701 filed in Japan on December 19, 2016, the entire disclosure of which is incorporated herein by reference.

The present invention relates to a battery pack.

BACKGROUND Conventionally, there is known a battery pack in which a plurality of batteries are accommodated in a member such as a housing. For example, Patent Document 1 discloses a battery assembly configured to suppress the occurrence of electrical connection failure even when relative displacement occurs between the battery assembly module and the control substrate due to vibration or the like.

JP, 2014-013726, A

In patent document 1, the terminal part 61x and the ground terminal part 66x which comprise the assembled battery module 11 are hard to receive to the influence from an external environment by the base 14 and the cover 15 which cover the assembled battery module 11 whole. However, when it is desired to reduce the influence of the external environment only on the external connection terminals and the like, it is difficult to say that the cover covering the whole has an optimal shape as a part.

An object of the present invention made in view of such problems is to provide a battery pack capable of reducing the influence of the external environment on an external connection terminal or the like while efficiently using a space.

In order to solve the above problems, the battery pack according to the first aspect is:
With the upper case,
An external connection terminal exposed from a recess provided on the outer surface of the upper case;
A connector attached to the upper case for connecting a harness;
A protective cover attached to the upper case so as to cover the entire external connection terminal and the connector;
Equipped with

According to the battery assembly of one embodiment of the present invention, the space can be efficiently used, and the influence of the external environment on the external connection terminals and the like can be reduced.

It is an external appearance perspective view of the assembled battery concerning a 1st embodiment. It is a functional block diagram which shows the outline of the power supply system containing the assembled battery of FIG. It is a figure which shows arrangement | positioning of the battery cell accommodated in the assembled battery of FIG. It is a figure which shows the state in which the battery cell of FIG. 3 was accommodated in the lower case and the cell holder. It is a figure which shows the structure of the inter-cell bus bar. FIG. 5 is a cross-sectional view taken along line AA of FIG. 4; It is a front view of the assembled battery in which the sensor board | substrate was attached. FIG. 8 is an enlarged cross-sectional view focusing on only one inter-cell bus bar in a cross section taken along the line BB in FIG. 7; It is a figure which shows the assembled battery in which the BAT case and the accessory base 200 were attached. It is a figure which shows the assembled battery with which the relay, the MOS board | substrate, and the BMS board | substrate were attached. It is a figure which shows the structure of a BMS board | substrate. It is a disassembled perspective view of the assembled battery of FIG. It is the figure which looked at the assembled battery of FIG. 9 from the side of the 1st side. It is the figure which looked at the assembled battery of FIG. 9 from the back side. It is a perspective view by top view of a protective cover. It is a perspective view by bottom surface view of a protective cover. It is a front view of a protective cover. It is a rear view of a protective cover. It is the perspective view which showed a mode before attaching a protective cover to an upper case. FIG. 15B is an enlarged perspective view showing the protective cover by a cross section taken along a line CC in FIG. 15A. FIG. 16B is an enlarged cross-sectional view showing the entire protective cover by a cross section taken along line DD in FIG. 16B.

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

First Embodiment
FIG. 1 is an external perspective view of the battery assembly 100 according to the first embodiment. The battery assembly 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 battery assembly 100 has a substantially rectangular parallelepiped shape. The surface facing in the positive direction of the X axis is also referred to as the first side surface of the battery assembly 100. The surface facing in the negative direction of the X axis is also referred to as the second side surface of the battery assembly 100. The surface facing in the positive direction of the Z axis is also referred to as the upper surface of the battery assembly 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 battery assembly 100. The surface facing the negative direction of the Y axis is also referred to as the front surface of the battery assembly 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 battery assembly 100. The names of the surfaces of the battery assembly 100 can be applied as the names indicating the surfaces 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 by the engagement member 180. The lower case 110, the cell holder 120, and the BAT case 500 are also engaged with each other on the second side by the engagement member 180. A 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 case 150 (see FIG. 3) described later is accommodated 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 part of the side where the upper surface and the first side surface are connected. The upper case 300 has a recess 303 in part of the side where the front surface and the upper surface are connected. The battery assembly 100 includes the SSG terminal 250, the LOAD terminal 260, and the 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. The battery assembly 100 includes a connector 310 at 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 battery assembly 100 is mounted and used in a vehicle including an internal combustion engine or a hybrid vehicle capable of traveling by power of both the internal combustion engine and the electric motor. The battery assembly 100 may be mounted, for example, under a seat of a vehicle. The battery assembly 100 may be mounted on, for example, a center console of a vehicle. The battery assembly 100 is not limited to vehicles, and may be used in other applications.

FIG. 2 is a functional block diagram schematically showing a power supply system 400 including the battery assembly 100 shown in FIG. The power supply system 400 includes the battery assembly 100, an alternator 410, a starter 420, a second secondary battery 430, a load 440, a switch 450, and a control unit 460. The battery assembly 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 battery assembly 100 includes a MOSFET 210 (Metal Oxide Semiconductor Field Effect Transistor), a relay 220, and a sensor 230. The battery assembly 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. Battery assembly 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. Relay 220 is electrically connected to MOSFET 210 and SSG terminal 250. The SSG terminal 250 is electrically connected to the alternator 410. MOSFET 210 is connected in series to second secondary battery 430 and load 440 via 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. A circuit that performs the function of the sensor 230 is mounted on the sensor substrate 231 (see FIG. 7).

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

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

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 melts when an overcurrent occurs.

The first secondary battery 130 is configured by an assembly of the battery cell 150 (see FIG. 3). The battery cell 150 which comprises the 1st secondary battery 130 may be secondary batteries, such as a lithium ion battery or a nickel hydride battery, for example. 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.

MOSFET 210 functions as a switching element that connects or disconnects second secondary battery 430 and load 440 in parallel with other components in power supply system 400. The battery assembly 100 may not include the MOSFET 210. The MOSFET 210 is mounted on the MOS substrate 212 (see FIG. 10).

The BMS 140 obtains measurement results such as the current or 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 charging rate of the first secondary battery 130 and the like. The charging rate is also referred to as SOC (State Of Charge). A circuit that performs the function of BMS 140 is mounted on BMS substrate 141 (see FIGS. 10 and 11).

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

The starter 420 can include, for example, a cell motor. The starter 420 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 can be configured 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, an audio provided in a vehicle, an air conditioner, a navigation system, and the like. The load 440 operates by consuming the supplied power. The load 440 operates by receiving power from the first secondary battery 130 while the engine drive is stopped, and operates by receiving power from the alternator 410 and the second secondary battery 430 during engine driving.

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

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

FIG. 3 is a perspective view showing the arrangement of the battery cell 150 housed in the assembled battery 100. As shown in FIG. The battery assembly 100 according to the present embodiment accommodates five battery cells 150-1 to 150-5. 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 and the power consumed by the driven device such as a vehicle.

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

In the battery assembly 100 according to the present embodiment, the battery cells 150 are stacked in the Z-axis direction in two stages and three stages. The battery cells 150 stacked in two stages are disposed on the positive direction side of the X axis. The battery cells 150 stacked in three stages are disposed on the negative side of the X axis. The number of stacked battery cells 150 can be appropriately changed in accordance with the number of battery cells 150 stored in the assembled battery 100. Insulating sheets 155 (see FIG. 12) for providing insulation between the battery cells 150 are disposed between the battery cells 150 to be stacked.

The surface of the battery cell 150 on the negative direction side of the Y axis is also referred to as a cap surface 151. Battery cell 150 is arranged such that cap surface 151 faces the front side of battery assembly 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 in the long side direction of the cap surface 151. The positive electrode terminal 152 and the negative electrode terminal 153 are electrodes that output power from the battery cell 150. The positive electrode terminal 152 and the negative electrode terminal 153 are 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 is opened to discharge the gas to the outside when the pressure inside the battery cell 150 reaches a predetermined pressure or more by the gas generated inside the battery cell 150. The pressure in the battery cell 150 can become equal to or higher than a predetermined pressure when the battery cell 150 is aged or thermally runaway. The predetermined pressure may be appropriately determined in accordance with the specification of the battery cell 150.

FIG. 4 is a view showing a state in which battery cell 150 is accommodated in lower case 110 and cell holder 120. As shown in FIG. The lower case 110 has an engagement hole 115 on the upper surface side. The lower case 110 also has an engagement hole 115 on the side of the bottom not shown. The cell holder 120 has an engagement claw 128 on the upper surface side. The cell holder 120 also has an engagement claw 128 on the side of the bottom not shown. The engagement holes 115 and the engagement claws 128 engage the lower case 110 and the cell holder 120 by fitting each other 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 engagement hole 115 is located outside the engagement claw 128. The lower case 110 and the cell holder 120 may be configured such that the engagement hole 115 is located inside the engagement claw 128. The engagement hole 115 and the engagement claw 128 may be exchanged. That is, the lower case 110 and the cell holder 120 may be configured such that the engagement hole 115 is provided in the cell holder 120 and the engagement claw 128 is provided in the lower case 110.

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

The cell holder 120 has an engagement hole 125 on the side of the upper surface to be engaged with the BAT case 500. The cell holder 120 also has an engagement hole 125 on the side of the bottom not shown. The cell holder 120 has a plurality of accommodating portions 129 which are provided in a substantially cylindrical shape in a negative direction of the Y axis from the front surface. The number of housing portions 129 is the same as the number of electrode terminals of the battery cell 150.

The battery assembly 100 includes inter-cell bus bars 160-1 to 160-4, a total plus terminal bus bar 164, and a total minus terminal bus bar 165 on the cell holder 120 side. The intercell bus bars 160-1 to 4 are also collectively referred to as an intercell bus bar 160. The inter-cell bus bar 160, the total plus terminal bus bar 164, and the total minus terminal bus bar 165 are collectively referred to as a bus bar. The bus bar is electrically connected to the electrode terminal of the battery cell 150. The bus bar may be welded to the electrode terminal of the battery cell 150. The bus bar may be electrically connected to the electrode terminal of the battery cell 150 by other methods such as crimping.

The inter-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. Inter-cell bus bar 160-4 electrically connects positive electrode terminal 152 of battery cell 150-4 and negative electrode terminal 153 of battery cell 150-5. The inter-cell bus bars 160-2 and 3 electrically connect the electrode terminals of the battery cell 150, similarly to the other inter-cell bus bars 160. Total plus terminal bus bar 164 is electrically connected to positive terminal 152 of battery cell 150-5. The total negative terminal bus bar 165 is electrically connected to the negative terminal 153 of the battery cell 150-1. The bus bars connect the battery cells 150 in series between the total plus terminal bus bars 164 and the total minus terminal bus bars 165.

FIG. 5 shows the structure of inter-cell bus bar 160. Referring to FIG. The inter-cell bus bar 160 includes a convex portion 161, a terminal connection portion 162, a sensor attachment terminal 163, and an arm portion 163b. Inter-cell bus bar 160 may be made of, for example, a conductive metal such as copper or aluminum.

The convex portion 161 of the inter-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 connection portions 162. For example, in FIG. 4, when the inter-cell bus bar 160-1 is viewed from the positive direction of the X axis, the convex portion 161 protrudes in the negative direction of the Y axis more than the two terminal connection portions 162.

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, for example, by welding such as bead welding at the periphery of the welding opening 162a.

The sensor attachment terminal 163 is a terminal to which the sensor board 231 (circuit board, see FIG. 7) is attached. The sensor attachment terminal 163 has a nut 163a (fixing mechanism). The nut 163 a is press-fit into a through hole formed at the center of the sensor attachment terminal 163. The sensor substrate 231 is attached to the sensor attachment terminal 163 by, for example, a bolt screwed to a nut 163a. The sensor substrate 231 is electrically connected to the electrode terminal of each battery cell 150.

Arm portion 163 b extends in the direction away from battery cell 150, that is, in the negative direction of the Y axis in FIG. 4. In particular, arm portion 163 b extends obliquely from the welding surface of battery cell 150 and inter-cell bus bar 160. The arm portion 163 b has elasticity.

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

The total plus terminal bus bar 164 and the total minus terminal bus bar 165 are electrically connected to the total plus copper bus bar 285 and the total minus copper bus bar 286 (see FIGS. 9 and 10) by the external connection section 166, respectively. The total plus copper bus bars 285 and the total minus copper bus bars 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 inserted into the screw hole 166a. The terminal connection portions 162 of the total plus terminal bus bars 164 and the total minus terminal bus bars 165 have sensor attachment terminals 163 in the same manner as the inter-cell bus bars 160. The sensor substrate 231 is electrically connected to the total plus terminal bus bar 164 and the total minus terminal bus bar 165 via the sensor attachment terminal 163.

As shown in FIG. 4, the battery assembly 100 includes a fastening portion 370 in the lower case 110. The fastening portion 370 is used to attach the accessory pedestal 200 (see FIG. 9).

As shown in FIG. 4, the battery assembly 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, for example, 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. 12) interposed between the safety valve cover 610 and the cap surface 151 of the battery cell 150. The seal 630 may be made of, for example, rubber such as EPDM (Ethylene-Propylene-Diene Monomer). 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 valves 154 of the battery cells 150-1 to 150-3 stacked in three stages. The safety valve cover 611 is commonly attached to the safety valves 154 of the battery cells 150-4 to 150-5 stacked in two stages. The safety valve covers 610 and 611 can hold the gas exhausted 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 exhausted from the safety valve 154 passes. The gas duct 612 projects from the safety valve cover 610 to the front side of the battery assembly 100. The safety valve cover 611 has

gas ducts

613 and 614 for passing the gas exhausted from the safety valve 154. The

gas ducts

613 and 614 project from the safety valve cover 611 to the front side of the battery assembly 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 the gas does not leak. In this case, the gas exhausted from the battery cells 150-1 to 150-3 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 battery assembly 100 is mounted on a vehicle, the gas discharge pipe 600 discharges gas, for example, to the external space at the bottom of the vehicle body.

By connecting the safety valve covers 610 and 611 to the gas discharge pipe 600 so as not to leak the gas, the gas is less likely to leak around the battery assembly 100. When the battery assembly 100 is mounted on a vehicle, the gas is discharged out of the vehicle and is less likely to leak into the vehicle. With the

gas ducts

612 and 614 protruding to the front side of the battery assembly 100, the gas discharged from the battery cell 150 is easily guided to the

gas ducts

612 and 614.

6 is a cross-sectional view taken along the line AA of FIG. In FIG. 6, the safety valve cover 610 and the bus bar are omitted. The battery cells 150-1 to 150-3 are stacked in three stages with the insulating sheet 155 interposed therebetween, and are accommodated between the lower case 110 and the cell holder 120. The lower case 110 is provided with a crushable zone 113 having a rib 114 on the positive direction side of the Y axis. In the crushable zone 113, the battery cell 150 is not accommodated. The stiffness of the crushable zone 113 may be enhanced by the ribs 114. The crushable zone 113 has a space in a portion other than the rib 114. By doing this, the crushable zone 113 is easily deformed so as to absorb an impact, for example, when the lower case 110 is impacted in the negative direction of the Y axis. As a result, the impact on the battery cell 150 can be mitigated. The lower case 110 may be reduced in weight.

FIG. 7 is a front view of the battery assembly 100 to which the sensor substrate 231 is attached. The description of the configuration also shown in FIG. 4 is omitted. The battery assembly 100 includes sensor substrates 231-1 and 2 and FPCs 232-1 and 2 (Flexible Print Circuit) on the front side. The sensor substrates 231-1 and 2 are also referred to as a sensor substrate 231. The FPCs 232-1 and 2 are also referred to as an FPC 232.

Sensor substrate 231-1 is a mounting member for sensor attachment terminals 163 of inter-cell bus bars 160-1 to 3 and total minus terminal bus bar 165 electrically connected to battery cells 150-1 to 3 stacked in three stages. Attached by 233. Sensor board 231-2 is electrically connected to sensor attachment terminals 163 of inter-cell bus bars 160-3 to 4 and total plus terminal bus bar 164 electrically connected to battery cells 150-4 to 5 stacked in two stages. It is attached by the attachment member 233 so that it may connect. The attachment member 233 may be, for example, a screw or a screw. The FPC 232-1 electrically connects the sensor substrate 231-1 to the BMS substrate 141 (see FIGS. 10 and 11). The BMS substrate 141 includes circuitry that performs the functions of the BMS 140 of FIG. The FPC 232-2 electrically connects the sensor substrate 231-1 and the sensor substrate 231-2.

Sensor substrate 231 includes circuitry that performs the function of 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 substrate 231 may measure current or voltage in response to a measurement instruction from the BMS substrate 141. The sensor substrate 231 may output the measurement result to the BMS substrate 141.

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

FIG. 8 is an enlarged cross-sectional view focusing on only one inter-cell bus bar 160-4 in the cross section taken along the line BB in FIG. One side of the inter-cell bus bar 160-4 is welded to the negative electrode terminal 153 of the battery cell 150-5 held in a state of being protruded 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 welding surface of the battery cell 150-5 and the inter-cell bus bar 160-4. A sensor substrate 231-2 is mounted on a sensor attachment terminal 163 continuously formed at the tip of the arm portion 163 b. The sensor substrate 231-2 is fixed to the sensor mounting terminal 163 by a mounting member 233 screwed to the nut 163a. More specifically, the inter-cell bus bar 160-4 fixes the sensor substrate 231-2 from the back surface side of the sensor attachment terminal 163 by the sensor attachment terminal 163 and the nut 163a. At this time, a part of the nut 163 a is accommodated in the inside of the accommodation portion 129 provided on the front surface of the cell holder 120. Although only the inter-cell bus bar 160-4 is illustrated here, the inter-cell bus bars 160-1 to 160-3 are attached to the sensor substrate 231 in the same manner, and a part of the nut 163a is a storage portion of the cell holder 120. It is housed inside of 129.

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

In the present embodiment, the battery assembly 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 battery assembly 100, the intercell busbar 160 is completely separated from the cell holder 120 by providing the intercell busbar 160 with a fixing mechanism (nut 163a) for attaching the sensor substrate 231 to the intercell busbar 160. Do. Thus, a space is formed between the two, and the assembled battery 100 can tolerate the dimensional tolerance of the inter-cell bus bar 160. Since the cell holder 120 includes 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 tolerance with respect to the size of the inter-cell bus bar 160 is larger by the assembled battery 100. Further, since the arm portion 163b is inclined and the sensor attachment terminal 163 can be displaced in the X-axis direction and the Y-axis direction, the tolerance of the tolerance with respect to the size of the inter-cell bus bar 160 is further increased by the assembled battery 100. As described above, the battery assembly 100 facilitates the alignment of the sensor substrate 231.

The arm portion 163b has elasticity and is inclined, so that the arm portion 163b can easily absorb stress. This improves the resistance of inter-cell bus bar 160 to shocks. On the other hand, excessive elastic deformation of the arm portion 163 b is restricted by the housing portion 129. That is, as shown in FIG. 8, when the arm portion 163 b is elastically deformed largely due to any cause, the sensor attachment terminal 163 contacts the edge portion 129 a of the housing portion 129. Thus, the battery assembly 100 prevents the arm portion 163b from being damaged. From the above two points, the reliability of the battery assembly 100 is improved.

Furthermore, since the battery assembly 100 does not need to provide the 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. 9 is a view showing the battery assembly 100 to which the BAT case 500 and the accessory pedestal 200 are attached. BAT case 500 is engaged with cell holder 120. The cell holder 120 and the BAT case 500 each have a protrusion 122 and a protrusion 502 on the side of the first side. The cell holder 120 and the BAT case 500 each have a protrusion 122 and a protrusion 502 also on the side of the second side not shown. The engagement member 180 engages the cell holder 120 and the BAT case 500 by holding the convex portion 122 and the convex portion 502 on the first side surface and the second side surface.

The BAT case 500 has, on the side of the upper surface and the side of the bottom, claws fitted in the engagement holes 125 of the cell holder 120 shown in FIG. The BAT case 500 and the cell holder 120 are also engaged by engagement of the engagement hole 125 of the cell holder 120 with the claw of the BAT case 500 on the top and bottom sides, respectively. The engagement holes 125 of the cell holder 120 may be located outside or inside the claws of the BAT case 500. The claws of the BAT case 500 and the engagement holes 125 of the cell holder 120 may be exchanged.

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

A module configured 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 battery cells 150 are stacked in three stages and a side in which 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 the 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 two stages and three stages. The lower case 110, the cell holder 120, and the BAT case 500, as well as the battery module, have two stages and three stages.

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

The lower case 110 has a nut hole 146 for attaching the BMS substrate 141 and a pin 147 for fitting in the fitting hole 144 (see FIG. 11) provided on the BMS substrate 141 on the upper surface on the third stage of the battery module. And The lower case 110 is provided with a rib 114 on the back side of the battery assembly 100. Lower case 110 is provided with fixing portion 116 on the back side of battery assembly 100. The battery assembly 100 can be fixed to a vehicle body or the like by fixing the fixing portion 116 with a bolt or the like. The lower case 110 includes a pillar 117 extending from the fixing portion 116 to the upper surface side. The pillars 117 may be thicker and have higher rigidity than other portions of the lower case 110. The lower case 110 is less likely to be deformed by an external force applied to the fixing portion 116 because the pillar 117 has high rigidity.

Auxiliary machine base 200 is fastened to fastening portion 370 with a bolt 340. The fastening portions 370 are provided at four places on the upper surface on the second stage side of the battery module. In the assembled battery 100, the dimension 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 third stage of the battery module. The location where the fastening portion 370 of the accessory pedestal 200 is provided is not limited to four, and may be three or less, or five or more. The accessory pedestal 200 can be more stably attached to the battery module by being fastened to the battery module at at least three fastening portions 370.

The accessory pedestal 200 illustrated in FIG. 9 is provided with bolts 340 for the fastening portion 370 provided on the upper surface on the second stage side of the BAT case 500 and the fastening portion 370 provided on the upper surface on the second stage side of the lower case 110. It is concluded. In other words, the accessory pedestal 200 illustrated in FIG. 9 is fastened across the entire battery module. When the accessory pedestal 200 is fastened across the entire battery module, the rigidity of the battery module may be enhanced as compared with, for example, the case where the accessory pedestal 200 is fastened only to the lower case 110.

The rigidity of the battery module may be enhanced by restricting relative displacement between the lower case 110, the cell holder 120 and the BAT case 500. When accessory base 200 is fastened across the entire battery module, relative displacement between lower case 110, cell holder 120 and BAT case 500 may be restricted. The accessory base 200 is fastened not only across the entire battery module, but also is fastened to the battery module so that relative displacement between the lower case 110, the cell holder 120 and the BAT case 500 is restricted. Good. The accessory pedestal 200 may be fastened, for example, to at least one location of the upper case 300. 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 restricted by fastening at least one place of the accessory pedestal 200 and the upper case 300.

Auxiliary machine base 200 is provided with a relay fastening portion 360 for mounting relay 220. The number of relay fastening portions 360 is not limited to three as illustrated in FIG. 9, and may be two or less, or four or more. The thickness of the portion provided with the relay fastening portion 360 of the accessory pedestal 200 may be thicker than the thickness of the other portion of the accessory pedestal 200. By doing this, the rigidity of the portion to which the relay 220 is attached can be enhanced. Vibration due to the operation of the relay 220 is less likely to propagate to the surroundings.

FIG. 10 is a view showing the battery assembly 100 to which the relay 220, the MOS substrate 212 and the BMS substrate 141 are attached. The description of the configuration also shown in FIG. 9 is omitted.

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

Relay 220 is fastened with a bolt 350 to a relay fastening portion 360 (see FIG. 9) provided on accessory pedestal 200. The places where the relay 220 is fastened are not limited to three places, but may be two places or less, or four places or more. The relay 220 can be more stably attached to the accessory pedestal 200 when the relay 220 is fastened to the accessory pedestal 200 at at least three places.

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

FIG. 11 is a diagram showing the configuration of the BMS substrate 141. As shown in FIG. The BMS substrate 141 includes a circuit component 142, a mounting hole 143, and a fitting hole 144. At least a portion of the circuit component 142 corresponds to a circuit that performs the function of the BMS 140. A nut hole 146 and a pin 147 are provided on the upper surface on the third stage side of the lower case 110. 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 attachment of the BMS substrate 141 to the battery module can be improved. Attachment of the BMS substrate 141 to the battery module can be facilitated.

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

A module configured of the accessory pedestal 200, the relay 220, the MOS substrate 212, and the BMS substrate 141 is also referred to as an accessory module.

FIG. 12 is an exploded perspective view of the battery assembly 100 shown in FIG. The battery module may be assembled as follows. The battery cells 150 are stacked in three and two steps sandwiching the insulating sheet 155, and are accommodated between the lower case 110 and the cell holder 120. The lower case 110 and the cell holder 120 are engaged by the engagement member 180. A bus bar is attached to the electrode terminal of the battery cell 150. The 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 substrate 231 is attached to the sensor attachment terminal 163 of the bus bar. The cell holder 120 is engaged by the engagement member 180 such that the BAT case 500 covers the side of the cap surface 151 of the battery cell 150. A gas exhaust 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 top of the BAT case 500.

The accessory module may be assembled as follows. Auxiliary machine base 200 is attached to the upper surface on the second stage side of the battery module with a bolt 340. On accessory pedestal 200, SSG copper bus bar 281, LOAD copper bus bar 282, total plus copper bus bar 285, and MOS substrate 212 are attached. The relay 220 is attached to the accessory pedestal 200 with a bolt 350. The BMS substrate 141 is attached to the upper surface on the third stage side of the battery module. The accessory pedestal 200 may be attached to the battery module after the relay 220 and the like are attached. If the relay 220 or the MOS substrate 212 is attached to the accessory pedestal 200 before the accessory pedestal 200 is attached to the battery module, assembly of the assembled battery 100 may be easier.

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

In the assembly of the battery module, the battery cell 150 may be adhered to the cell holder 120 by an adhesive. The adhesive may be any adhesive that can bond the battery cell 150 and the cell holder 120. The adhesive may be, for example, an acrylic adhesive or an epoxy adhesive. An adhesive may be applied to the cell holder 120. The adhesive may be applied to a 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 bonded to each other, a bus bar may be welded to the electrode terminal of the battery cell 150. When the electrode terminals and the bus bar are welded, the positional relationship between the electrode terminals and the bus bar may require high accuracy. In this case, welding the electrode terminal and the bus bar can be facilitated by enhancing the accuracy of the application position of the adhesive for bonding the battery cell 150 and the cell holder 120. By bonding the battery cell 150 and the cell holder 120 before the bus bar is welded to the battery cell 150, the productivity of the battery module can be improved.

In the present embodiment, the battery module and the accessory module can be assembled separately. By doing this, the productivity of the battery module and the accessory module, and the assembled battery 100 can be improved.

In the present embodiment, the battery assembly 100 includes the SSG terminal 250 and the LOAD terminal 260 on the side of the first side, and the GND terminal 270 on the front side. The GND terminal 270 can be easily identified by being disposed on a surface different from the surface on which the SSG terminal 250 and the LOAD terminal 260 are disposed. The battery assembly 100 includes a connector 310 on the side of the first side. The GND terminal 270 can be easily identified by being disposed on the side different from the connector 310. By doing so, erroneous wiring can be easily prevented when the battery assembly 100 is mounted on a 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, erroneous wiring can be further prevented when mounting the battery assembly 100 in a vehicle.

FIG. 13 is a view of the battery assembly 100 shown in FIG. 9 as viewed from the side of the first side. The battery assembly 100 includes the accessory pedestal 200 on the second stage side of the battery module including the lower case 110, the cell holder 120, and the BAT case 500. The second stage side of the battery module corresponds to the positive direction side of the X axis. Auxiliary machine pedestal 200 is fastened to fastening portion 370. In FIG. 13, the fastening portion 370 is shown by a broken line because it can not be seen by the accessory pedestal 200. The fastening portions 370 are provided at four 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 five or more. The fastening portion 370 may be provided on the third stage side of the battery module or may be provided on another part.

Battery cells 150-4 and 150-5 are accommodated in lower case 110. In FIG. 13, battery cells 150-4 and 150-5 are shown by broken lines because they are not visible in lower case 110.

Lower case 110 has cell back plate 118 on the back side of the part in which battery cell 150 is accommodated. The cell back plate 118 is shown by a broken 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. 13, the fastening portion 370 is provided on the rib 114. The fastening portion 370 may be provided on the intersection point 114 a of the rib 114 and the cell back plate 118. Fastening portion 370 provided on intersection point 114a can fasten accessory pedestal 200 with higher rigidity than fastening portion 370 provided at a point moved in the positive direction of the Y-axis from intersection point 114a. The fastening portion 370 may be provided in the vicinity of the intersection point 114a. As the position where the fastening portion 370 is provided is closer to the intersection point 114 a, the fastening portion 370 may fasten the accessory pedestal 200 with higher rigidity.

Relay 220 is mounted on accessory pedestal 200. Relay 220 may be mounted on accessory pedestal 200 closer to BAT case 500 than lower case 110. Relay 220 is separated from battery cell 150 by being placed on the side close to BAT case 500. By doing this, the vibration generated by the operation of the relay 220 is less likely to propagate to the battery cell 150.

FIG. 14 is a view of the battery assembly 100 shown in FIG. 9 as viewed from the rear side. The fastening portion 370 is provided on the rib 114. The fastening portion 370 may be provided on the intersection point 114 b of the rib 114 and the rib 114. Fastening portion 370 provided on intersection point 114b can fasten accessory pedestal 200 with higher rigidity than fastening portion 370 provided at a point moved in the positive or negative direction of the X axis from intersection point 114b. . The fastening portion 370 may be provided in the vicinity of the intersection point 114b. As the position where the fastening portion 370 is provided is closer to the intersection point 114 b, the fastening portion 370 may fasten the accessory pedestal 200 with higher rigidity.

Second Embodiment
The following describes the battery assembly 100 according to the second embodiment. The battery assembly 100 according to the second embodiment differs from the first embodiment in that the battery pack 100 further includes a protective cover 700. Below, about the same component as 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted. The points different from the first embodiment will be mainly described.

FIG. 15A is a top perspective view of the protective cover 700. FIG. 15B is a perspective view of the protective cover 700 as viewed from below. FIG. 15C is a front view of the protective cover 700. FIG. 15D is a rear view of the protective cover 700. FIG. 16A is a perspective view showing the state before the protective cover 700 is attached to the upper case 300. FIG. 16B is an enlarged perspective view showing the protective cover 700 by a cross section taken along the line CC in FIG. 15A. FIG. 16C is an enlarged cross-sectional view showing the entire protective cover 700 by a cross section taken along line DD in FIG. 16B.

The protective cover 700 is formed such that its front and upper surfaces are continuous via the R surface. Protective cover 700 has an opening 710 provided at its lower end. The protective cover 700 is provided symmetrically along a direction parallel to the front surface, and has a pair of sloped portions 720 that slope outward and obliquely upward from both ends of the opening 710. That is, the protective cover 700 is configured to narrow in width from the lower edge of the front to the opening 710. The protective cover 700 has a cover rib 730 formed to protrude from the inner surface, particularly from the back side of the upper surface.

As shown in FIG. 16B, the protective cover 700 covers a part of the upper surface of the upper case 300 and a part of the first side surface in a state of being attached to the upper case 300 covering substantially the entire assembled battery 100 from the outside. At the same time, the protective cover 700 covers the recess 301 and the recess 302. That is, the protective cover 700 covers the SSG terminal 250 (external connection terminal) and the LOAD terminal 260 (external connection terminal, see FIG. 1) exposed from the recess 301 and the recess 302. The protective cover 700 covers the connector 310 attached to the first side of the upper case 300 for connecting the harness 800. That is, the protective cover 700 is attached to the upper case 300 so as to cover the entire external connection terminals, ie, the SSG terminal 250 and the LOAD terminal 260, and the connector 310.

In the present embodiment, the upper case 300 has a case rib 305 protruding from the first side (see FIG. 16A). As shown in FIG. 16B, the cover rib 730 formed on the inner surface of the protective cover 700 and the case rib 305 protruding from the first side surface of the upper case 300 surround the connector 310. Here, the harness 800 connected to the connector 310 is guided from the opening 710 to the outside through the gap formed between the case rib 305 and the cover rib 730. More specifically, the tip of the case rib 305 is open in the Z-axis direction. The tip of the cover rib 730 is open in the X-axis direction. When the protective cover 700 is attached to the upper case 300, the harness 800 is guided to the opening 710 from the gap formed by the openings of the case rib 305 and the cover rib 730.

With the configuration of the protective cover 700 as described above, the battery assembly 100 according to the second embodiment can reduce the influence of the external environment on the external connection terminals and the like while efficiently using the space. That is, since the protective cover 700 covers only the periphery of the SSG terminal 250 and the LOAD terminal 260 and the connector 310, the protective cover 700 can be formed to the minimum required size. Furthermore, since the protective cover 700 covers the entire SSG terminal 250 and the LOAD terminal 260 and the connector 310, it is possible to suppress the entry of dust, water droplets and the like. In particular, the battery pack 100 can reduce the gap around the connector 310 by the cover rib 730 and the case rib 305, and can further suppress the entry of dust, water droplets, and the like. Furthermore, protective cover 700 plays a role as a safety countermeasure component, for example, to prevent an occupant of the vehicle from touching each component of battery assembly 100 such as SSG terminal 250, LOAD terminal 260, connector 310, or harness 800. Also play.

The battery assembly 100 can release the harness 800 connected to the connector 310 to the outside by having the opening 710. On the other hand, in the battery assembly 100, the opening area can be narrowed by the pair of inclined portions 720 formed from both ends of the opening 710, and intrusion of water droplets and the like due to water splashing from below can be suppressed.

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

100 assembled battery 110 lower case 112 convex portion 113 crushable zone 114 rib 114a, 114b intersection point 115 engaging hole 116 fixing portion 117 pillar 118 cell back plate 120 cell holder 122 convex portion 125 engaging hole 128 engaging claw 129 accommodating portion 129a edge Part 130 First rechargeable battery 140 BMS (Battery controller)
141 BMS board 142 circuit part 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 160 inter-cell bus bar 161 convex part 162 terminal connection portion 162a Welding opening 163 Sensor mounting terminal 163a Nut (fixing mechanism)
163b arm portion 164 total plus terminal bus bar 165 total minus terminal bus bar 166 external connection portion 180 engagement member 200 accessory base 210 MOSFET
212 MOS substrate 220 relay 230 sensor 231 sensor substrate (circuit substrate)
232 FPC
233 Mounting member 240 fusible link 250 SSG terminal (external connection terminal)
260 LOAD terminal (external connection 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 305 case rib 310 connector 312 MOS cable 314

connector cable

340, 350 bolt 360 relay Fastening section 370 Fastening section (Accessory pedestal)
400 power system 410 alternator 420 starter 430 second secondary battery 440 load 450 switch 460 control unit 500 BAT case 502 convex part 600

gas exhaust pipe

610, 611

safety valve cover

612, 613, 614 gas duct 620 gas tube 630 seal 700 protective cover 710 opening 720 slope 730 cover rib 800 harness

Claims

With the upper case,
An external connection terminal exposed from a recess provided on the outer surface of the upper case;
A connector attached to the upper case for connecting a harness;
A protective cover attached to the upper case so as to cover the entire external connection terminal and the connector;
Equipped with
Battery pack.
The protective cover has an opening provided at the lower end.
The assembled battery according to claim 1.
The protective cover is provided symmetrically along a direction parallel to the side surface of the upper case, and has a pair of inclined portions inclined obliquely outward from the both ends of the opening.
The assembled battery according to claim 2.
A cover rib formed on an inner surface of the protective cover and a case rib protruding from a side surface of the upper case surround the connector.
An assembled battery according to any one of claims 1 to 3.