JP2019192418A - Assembled battery - Google Patents

Abstract

To provide an assembled battery capable of reducing intrusion of dust inside.SOLUTION: An assembled battery 100 includes: a plurality of battery cells 150 having a pair of electrode terminals 152, 153; modules 110, 120 holding the plurality of battery cells 150; a sensor substrate 450 electrically connected to the pair of electrode terminals 152, 153; and an upper case 300 disposed to cover the outside of the modules 110, 120 and the sensor substrate 450.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an assembled battery.

  Conventionally, an assembled battery that houses a plurality of battery cells in a casing is known (see, for example, Patent Document 1).

JP2013-12464A

  There is a demand for reducing dust intrusion into the assembled battery.

  The objective of this invention made | formed in view of this viewpoint is providing the assembled battery which can reduce the penetration | invasion of the dust to an inside.

In order to solve the above problem, the assembled battery according to the first aspect is:
A plurality of battery cells having a pair of electrode terminals;
A module for holding the plurality of battery cells;
A sensor substrate electrically connected to the pair of electrode terminals;
And an upper case disposed on the outside of the module and the sensor substrate.

  According to the assembled battery according to the first aspect, intrusion of dust into the assembled battery can be reduced.

It is an external appearance perspective view of the assembled battery which concerns on one Embodiment. It is a disassembled perspective view of the assembled battery of FIG. It is a figure which shows the example of arrangement | positioning of the battery cell accommodated in the assembled battery of FIG. It is a figure which shows the structure of the bus bar between cells. It is the schematic of the AA cross section of FIG. It is the 1st modification of the schematic of the cross section shown in FIG. 6 is a second modification of the schematic cross-sectional view shown in FIG. It is the figure which expanded the range D of FIG. It is a general-view perspective view which shows the modification of an upper case. FIG. 10 is a diagram showing an example in which (a) the bead is on the outer surface in the upper case of FIG. 9 (b) the bead is on the inner surface. 6 is a third modification of the schematic cross-sectional view shown in FIG. 5.

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

  As shown in FIG. 1, the assembled battery 100 according to an embodiment includes an upper case 300, a lower case 110, a cell holder 120, and a gas exhaust pipe 500. The assembled battery 100 has a substantially rectangular parallelepiped shape. The surface facing the positive direction of the X axis is also referred to as the first side surface of the battery pack 100. The surface facing the negative direction of the X axis is also referred to as the second side surface of the battery pack 100. The surface facing the positive direction of the Z axis is also referred to as the upper surface of the assembled battery 100. The surface facing the negative direction of the Z axis corresponding to the opposite side of the upper surface is also referred to as the bottom surface of the battery pack 100. The surface facing the negative direction of the Y axis is also referred to as the front surface of the battery pack 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 pack 100. The names of the surfaces of the assembled battery 100 can be applied as names indicating the surfaces of the lower case 110 and the cell holder 120. The lower case 110 is also simply referred to as a case. The cell holder 120 is also simply referred to as a holder. The descriptions of “lower” and “upper” are identifiers for distinguishing configurations. In the present embodiment, the configuration shown as the lower case 110 is located at the lower portion of the configuration shown as the upper case 300, but is not limited to the lower portion, and may be located at the upper portion or the side portion.

  The lower case 110, the cell holder 120, and the upper case 300 may be made of a resin such as PBT (Poly-Butylene Terephthalate).

  The upper case 300 has a recess 301 in a part of the side connecting the upper surface and the first side surface. The upper case 300 has a recess 302 in a part of the side where the front surface and the upper surface are connected. The assembled battery 100 includes an external positive terminal 250 and an external negative terminal 270 in the recess 301 and the recess 302, respectively.

  The gas discharge pipe 500 discharges the gas discharged from the battery cell 150 (see FIG. 2) from the inside of the case to the outside of the case. The gas exhaust pipe 500 may be a metal tube, for example.

  In this embodiment, it is assumed that the assembled battery 100 is mounted and used in a vehicle such as a vehicle equipped with 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 assembled battery 100 may be mounted under a vehicle seat, for example. The assembled battery 100 may be mounted on a center console of a vehicle, for example. The assembled battery 100 is not limited to a vehicle, and may be used for other purposes.

  As shown in FIG. 2, the assembled battery 100 is composed of various components. The assembled battery 100 includes a battery cell 150 between the cell holder 120 and the lower case 110. The configuration in which the cell holder 120 and the lower case 110 hold and accommodate the battery cell 150 is also referred to as a battery module. The cell holder 120 and the lower case 110 are fastened by the fastening member 112 on the first side face and the second side face. The fastening member 112 may be a screw or the like.

  As shown in FIG. 3, the assembled battery 100 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 voltage of the battery cells 150 and the power consumed by a driven device such as a vehicle.

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

  In the assembled battery 100 according to this 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 arranged on the positive side of the X axis. The battery cells 150 stacked in three stages are arranged on the negative side of the X axis. The number of battery cells 150 stacked may be appropriately changed according to the number of battery cells 150 accommodated in the assembled battery 100. Between the battery cells 150 to be stacked, an insulating sheet 155 (see FIG. 2) for insulating the battery cells 150 is disposed.

  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. The battery cell 150 is disposed so that the cap surface 151 faces the front side of the battery pack 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 terminal 152 and the negative terminal 153 are provided near both ends of the cap surface 151 in the long side direction. The positive terminal 152 and the negative 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 terminal 152 and the negative terminal 153. The safety valve 154 is opened to discharge the gas to the outside when the pressure generated in the battery cell 150 causes the pressure inside the battery cell 150 to exceed a predetermined pressure. The pressure inside the battery cell 150 can be equal to or higher than a predetermined pressure when the battery cell 150 has deteriorated over time or has run out of heat. The predetermined pressure can be appropriately determined according to the specifications of the battery cell 150.

  As shown in FIG. 2, the battery cell 150 is held by the cell holder 120. An insulating sheet 155 is inserted between the battery cells 150. The battery cell 150 may be adhered to the cell holder 120 with 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. The adhesive may be applied to the cell holder 120. The adhesive may be applied to a portion of the cell holder 120 that faces the cap surface 151 of the battery cell 150. The battery cell 150 may be inserted into the cell holder 120 after an adhesive is applied to the cell holder 120.

  The assembled battery 100 includes an inter-cell bus bar 160, a total positive terminal bus bar 164, and a total negative terminal bus bar 165 on the front surface of the battery module. The inter-cell bus bar 160 electrically connects the positive terminal 152 of the battery cell 150 and the negative terminal 153 of another battery cell 150 (see FIG. 3). The total positive terminal bus bar 164 is electrically connected to the positive terminal 152 of the battery cell 150-5. The total minus terminal bus bar 165 is electrically connected to the negative terminal 153 of the battery cell 150-1. 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 bus bar connects the battery cells 150 in series between the total positive terminal bus bar 164 and the total negative terminal bus bar 165.

  In a state where the battery cell 150 is held by the cell holder 120, a bus bar may be welded to the electrode terminal of the battery cell 150. When the electrode terminal and the bus bar are welded, a high accuracy may be required for the positional relationship between the electrode terminal and the bus bar. In this case, welding of the electrode terminal and the bus bar can be facilitated by increasing the accuracy of the application position of the adhesive that bonds the battery cell 150 and the cell holder 120. In addition, since the battery cell 150 and the cell holder 120 are bonded before the bus bar is welded to the battery cell 150, the productivity of the battery module can be improved.

  As shown in FIG. 4, the inter-cell bus bar 160 includes a convex portion 161, a terminal connection portion 162, and a sensor attachment terminal 163. The inter-cell bus bar 160 may be made of a conductive metal such as copper or aluminum.

  The convex portion 161 of the inter-cell bus bar 160 is provided in order to avoid contact with a structure such as a rib provided on the cell holder 120. The terminal connection part 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. When the inter-cell bus bar 160 is viewed from the positive direction of the X axis, the convex portion 161 protrudes in the negative direction of the Y axis from the two terminal connection portions 162.

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

  The sensor attachment terminal 163 is a terminal to which the sensor substrate 450 (see FIG. 2) is attached. The sensor attachment terminal 163 has a female screw portion 163a. The sensor substrate 450 is attached to the sensor attachment terminal 163 by, for example, a screw that is screwed into the female screw portion 163a. The sensor substrate 450 is electrically connected to the electrode terminal of each battery cell 150.

  As shown in FIG. 2, the assembled battery 100 includes a safety valve cover 410 and a seal 420 on the front surface of the battery module. The safety valve cover 410 is provided on the front surface of the cell holder 120 with a seal 420 interposed between the safety valve cover 410 and the cell holder 120. The safety valve cover 410 covers the safety valve 154 located on the cap surface 151 of the battery cell 150. The safety valve cover 410 may be made of a resin such as PBT, for example. The seal 420 may be made of rubber such as EPDM (Ethylene-Propylene-Diene Monomer). The safety valve cover 410 is attached to the cell holder 120 with a fastening member 416. The fastening member 416 may be, for example, a screw.

  The safety valve cover 410 is attached in common to the safety valves 154 of the battery cells 150-1 to 150-3 stacked in three stages and the safety valves 154 of the battery cells 150-4 to 5 stacked in two stages. The seal 420 has an opening at a position corresponding to the safety valve 154.

  The safety valve cover 410 has a gas duct that allows the gas discharged from the safety valve 154 to pass therethrough. The gas duct is connected to a gas exhaust pipe 500 (see FIG. 1). The gas discharged from the safety valve 154 passes through the gas duct included in the safety valve cover 410 and the gas discharge pipe 500 and is discharged to the outside of the assembled battery 100. When the assembled battery 100 is mounted on a vehicle, the gas discharge pipe 500 discharges gas into an external space below the vehicle body, for example.

  By connecting from the safety valve cover 410 to the gas exhaust pipe 500, it becomes difficult for gas to leak around the assembled battery 100. When the assembled battery 100 is mounted on a vehicle, the gas discharge path is connected to the outside of the vehicle, whereby the gas is discharged outside the vehicle and is difficult to leak into the vehicle. That is, gas can be safely discharged.

  As shown in FIG. 2, the assembled battery 100 includes a sensor substrate 450 on the front surface of the battery module.

  The sensor substrate 450 is attached to the sensor attachment terminal 163 of the bus bar that is electrically connected to the electrode terminal of the battery cell 150 by the attachment member 451. The attachment member 451 may be, for example, a screw. The sensor substrate 450 can measure at least one of a current flowing between the electrode terminals of each battery cell 150 and a voltage between the electrode terminals. The sensor substrate 450 may include a circuit that functions as a BMS (Battery Management System).

  As shown in FIG. 2, the assembled battery 100 includes a relay 220 and vibration isolation members 222 and 224 on the upper surface of the lower case 110. Two relays 220 are provided. The two relays 220 are distinguished as a relay 220a and a relay 220b, respectively. The number of relays 220 is not limited to two, and may be one or three or more. The anti-vibration members 222 and 224 may be made of a material such as urethane, for example. The vibration isolation member 222 is located on the bottom side of the relay 220. The vibration isolation member 224 is located on the upper surface side of the relay 220. That is, the relay 220 is surrounded by the vibration isolation members 222 and 224. Since the vibration isolation members 222 and 224 surround the relay 220, vibration caused by the operation of the relay 220 is difficult to be transmitted to the battery module.

  The assembled battery 100 includes copper bus bars 230, 231, 232, 233 and 234 and a fuse 236 on the upper surface of the battery module. The copper bus bar 230 electrically connects the total negative terminal bus bar 165 and the external negative terminal 270 (see FIG. 1). Copper bus bar 231 electrically connects total plus terminal bus bar 164 and one end of relay 220a. Copper bus bar 232 electrically connects the other end of relay 220a and one end of relay 220b. The copper bus bar 233 electrically connects the other end of the relay 220b and one end of the fuse 236. The copper bus bar 234 electrically connects the other end of the fuse 236 and the external positive terminal 250 (see FIG. 1). That is, the two relays 220 and the fuse 236 are connected in series between the total positive terminal bus bar 164 and the external positive terminal 250. The copper bus bars 230, 231, 232, 233 and 234 and the fuse 236 are fastened to the upper surface of the battery module by a fastening member 238. The fastening member 238 may be, for example, a screw.

  External positive terminal 250 (see FIG. 1) and one end of copper bus bar 234 are attached to the upper surface of the battery module via packing 252. External negative terminal 270 (see FIG. 1) and one end of copper bus bar 230 are attached to the upper surface of the battery module via packing 272. The packings 252 and 272 may be made of rubber such as EPDM. The packings 252 and 272 seal between the recesses 301 and 302 (see FIG. 1) of the upper case 300 so that water, dust, or the like does not easily enter the assembled battery 100.

  As shown in FIG. 2, the assembled battery 100 includes an upper case 300 that covers the battery module from the upper surface. The upper case 300 is inserted into the battery module in the negative direction of the Z axis. The upper case 300 has convex portions on the first side surface, the second side surface, and the back surface. The convex portion of the upper case 300 is fastened by the clip 310 and the convex portion protruding from the first side surface and the second side surface of the cell holder 120. The convex portion of the upper case 300 is fastened by the clip 310 and the convex portion protruding from the back surface of the lower case 110.

  FIG. 5 is a schematic view of the AA cross section of FIG. As shown in FIG. 5, the cell holder 120 has a holding surface 601 that faces the cap surface 151 (see FIG. 3) of the battery cell 150. The cell holder 120 holds the battery cell 150 by being joined to the cap surface 151 of the battery cell 150 by the holding surface 601. In other words, the cap surface 151 of the battery cell 150 is held by the holding surface 601.

  The cell holder 120 includes ribs 602 positioned between the battery cells 150. The rib 602 protrudes from the holding surface 601 in the positive direction of the Y axis. Battery cell 150 is partitioned by rib 602. The cell holder 120 includes a bottom portion 121 including a bottom surface, a front surface portion 122 extending from the bottom portion 121 in the positive Z-axis direction, and a rib 125 protruding from the front surface portion 122 in the negative Y-axis direction.

  The lower case 110 has a bottom surface 701. The lower case 110 includes a rib 702 on the bottom surface 701. The rib 702 protrudes from the bottom surface 701 in the negative direction of the Y axis. The rib 702 is provided between the battery cells 150 accommodated in the lower case 110. Battery cell 150 is partitioned by rib 702.

  The inter-cell bus bar 160 electrically connects the positive terminal 152 of the battery cell 150-1 and the negative terminal 153 of the battery cell 150-2. The inter-cell bus bar 160 electrically connects the positive terminal 152 of the battery cell 150-3 and the negative terminal 153 of the battery cell 150-4 (see FIG. 3).

  The sensor substrate 450 is disposed on the negative side of the Y axis with respect to the battery cell 150 and the inter-cell bus bar 160.

  The upper case 300 is disposed so as to cover the outside of the cell holder 120 and the lower case 110 constituting the battery module and the sensor substrate 450. The upper case 300 is located outside the outer end portion of the rib 125. Further, the lower end portion of the upper case 300 is disposed at a position overhanging outward from the outer end portion of the rib 125. Here, the outer end portion of the rib 125 is an end portion on the negative direction side of the Y axis of the rib 125. Thus, when the upper case 300 is positioned outside the outer end portion of the rib 125, the assembled battery 100 according to the present embodiment can suppress dust from accumulating on the rib 125 of the cell holder 120. The upper case 300 can be fastened to the battery module by, for example, a clip 310 shown in FIG.

  As described above, the assembled battery 100 according to this embodiment includes the upper case 300 that is disposed so as to cover the outside of the module and the sensor substrate 450. As a result, the assembled battery 100 forms a dustproof structure with the upper case 300. Therefore, the assembled battery 100 according to the present embodiment can reduce the intrusion of dust into the assembled battery 100.

(First modification)
6 is a first modification of the schematic diagram of the AA cross section of FIG. 1 shown in FIG. In the first modification, differences from the cross-sectional view shown in FIG. 5 will be mainly described.

  The cell holder 120a according to the first modification includes a bottom portion 121 including a bottom surface, a front surface portion 122 extending from the bottom portion 121 in the positive direction of the Z axis, and a rib 125a protruding from the front surface portion 122 in the negative direction of the Y axis. Have.

  The upper case 300a according to the first modification has a snap fit portion 305. For example, the snap fit portion 305 uses the elasticity of the snap fit portion 305 to fit the convex portion of the snap fit portion 305 into the concave portion of the rib 125a, thereby fitting the upper case 300a and the cell holder 120a. sell.

  That is, the rib 125a included in the cell holder 120a and the snap fit portion 305 included in the upper case 300a can function as a fitting unit that fits the cell holder 120a and the upper case 300a in the Z-axis direction (vertical direction).

  The fitting means for fitting the cell holder 120a and the upper case 300a in the Z-axis direction is not limited to the rib 125a and the snap fit portion 305. For example, the fitting means for fitting the cell holder 120a and the upper case 300a may include a bolt, a clip, a claw shape, or the like.

  Thus, by having the fitting means for fitting the module and the upper case 300a in the Z-axis direction, the assembled battery 100 can improve the reliability of the sealing performance for reducing the intrusion of dust.

(Second modification)
7 is a second modification of the schematic diagram of the AA cross section of FIG. 1 shown in FIG. In the second modification, differences from the cross-sectional view shown in FIG. 5 will be mainly described.

  The cell holder 120b according to the second modification has a stepped portion 126. The stepped portion 126 has a stepped shape and protrudes from the front surface portion 122 of the cell holder 120b in the negative direction of the Y axis.

  Hereinafter, description will be given with reference to FIG. 8 which is an enlarged view of the range D of FIG.

  As shown in FIG. 8, the stepped portion 126 of the cell holder 120b has a first surface 126a, a second surface 126b, a third surface 126c, and a corner portion 126d.

  The first surface 126a and the third surface 126c are surfaces that face the positive direction of the Z axis. The third surface 126c extends from the front surface portion 122 of the cell holder 120b toward the negative direction of the Y axis. The first surface 126a is located on the negative side of the Z axis with respect to the third surface 126c.

  The second surface 126b is a surface facing the negative direction of the Y axis. The second surface 126b extends from the first surface 126a in the positive direction of the Z axis.

  The corner portion 126d connects the second surface 126b and the third surface 126c. As shown in FIG. 8, the corner 126d may have a rounded chamfered shape. As described above, since the corner portion 126d has a chamfered shape, it is possible to reduce a possibility that the upper case 300 is caught by the cell holder 120b when the upper case 300 is put on the outside of the cell holder 120b in the assembly process.

  In FIG. 8, the upper case 300 is shown separated from the step portion 126 of the cell holder 120 b, but actually, the upper case 300 is the first surface of the step portion 126 in a state where the assembled battery 100 is assembled. 126a and the second surface 126b are in contact with the two surfaces. More specifically, at least a part of the surface of the upper case 300 facing the negative direction of the Z axis is in contact with the first surface 126a, and at least a part of the surface of the upper case 300 facing the positive direction of the Y axis is the first surface. Abuts against the two surfaces 126b.

  As described above, the upper case 300 is in contact with the two surfaces, ie, the first surface 126a and the second surface 126b of the stepped portion 126, so that the assembled battery 100 can double protect dust from entering. That is, even if a situation occurs in which the upper case 300 is separated from the first surface 126a, the assembled battery 100 can reduce the intrusion of dust because the upper case 300 is in contact with the second surface 126b. Even if the upper case 300 is separated from the second surface 126b, the assembled battery 100 can reduce the intrusion of dust because the upper case 300 is in contact with the first surface 126a. Therefore, the assembled battery 100 can improve the reliability of the sealing performance for reducing the intrusion of dust.

(Modification of upper case)
FIG. 9 is an overview perspective view showing an upper case 300c according to a modification. As shown in FIG. 9, the upper case 300c according to the modified example has a bead 306 extending in the Z-axis direction on the front surface. Although not shown in FIG. 9, the upper case 300c may have a bead 306 extending in the Z-axis direction on the back surface. The cross section of the bead 306 may be, for example, a substantially rectangular shape, but is not limited thereto, and may have another shape.

  Although FIG. 9 shows an example in which seven beads 306 are provided on the front surface of the upper case 300c, the number of beads 306 is not limited to this. One or more arbitrary numbers of beads 306 may be provided on the front surface of the upper case 300c.

  The bead 306 may be provided on the outer surface of the upper case 300c as shown in FIG. 10 (a), or may be provided on the inner surface of the upper case 300c as shown in FIG. 10 (b). . The outer surface of the upper case 300c is a surface facing the outside of the upper case 300c. The inner surface of the upper case 300c is a surface facing the inner side of the upper case 300c.

  Thus, by providing the bead 306 in the upper case 300c, the rigidity of the upper case 300c can be increased and the surface accuracy can be improved. Thereby, the assembled battery 100 can reduce the possibility that a gap is generated between the upper case 300c and the module, and thus can improve the sealing performance for reducing the intrusion of dust.

(Third Modification)
11 is a third modification of the schematic diagram of the AA cross section of FIG. 1 shown in FIG. In the third modification, differences from the cross-sectional view shown in FIG. 5 will be mainly described.

  The cell holder 120b according to the third modification is the same as the cell holder 120b according to the second modification shown in FIG. The upper case 300c according to the third modification is the same as the upper case 300c shown in FIG. That is, the upper case 300c according to the third modification has a bead 306 on the inner surface.

  The upper case 300c according to the third modification abuts on the first surface 126a and the second surface 126b of the stepped portion 126, similarly to the upper case 300 shown in FIG. 8 in the second modification. Further, the surface of the bead 306 provided on the inner surface of the upper case 300c that faces the negative direction of the Z-axis is in contact with the third surface 126c (see FIG. 8) of the stepped portion 126.

  Thus, the upper case 300c abuts on the two surfaces of the step portion 126, the first surface 126a and the second surface 126b, and the bead 306 provided on the inner surface of the upper case 300c is the third surface 126c of the step portion 126. The battery pack 100 can protect the intrusion of dust in triplicate.

  That is, even if the upper case 300c is separated from the first surface 126a, the upper case 300c is in contact with the second surface 126b and the bead 306 is in contact with the third surface 126c. The assembled battery 100 can reduce intrusion of dust. Even if the upper case 300c is separated from the second surface 126b, the upper case 300c is in contact with the first surface 126a and the bead 306 is in contact with the third surface 126c. The assembled battery 100 can reduce intrusion of dust. Further, even if the bead 306 is separated from the third surface 126c, the assembled battery 100 reduces the intrusion of dust by the upper case 300c being in contact with the first surface 126a and the second surface 126b. Yes. Therefore, the assembled battery 100 can improve the reliability of the sealing performance for reducing the intrusion of dust.

  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. Accordingly, it should be noted that these variations or modifications are included in the scope of the present disclosure. 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.

100 assembled battery 110 lower case 112 fastening member 120, 120a, 120b cell holder 121 bottom 122 front surface 125, 125a rib 126 stepped portion 126a first surface 126b second surface 126c third surface 126d corner 150 battery cell 151 cap surface 152 positive electrode Terminal 153 Negative terminal 154 Safety valve 155 Insulation sheet 160 Inter-cell bus bar 161 Protruding part 162 Terminal connection part 162a Welding opening 163 Sensor mounting terminal 163a Female thread part 164 Total positive terminal bus bar 165 Total negative terminal bus bar 220 (220a, 220b) Relay 222, 224 Anti-vibration member 230, 231, 232, 233, 234 Copper bus bar 236 Fuse 238 Fastening member 250 External positive terminal 252 Packing 270 External negative terminal 272 Packing 300 , 300a, 300c Upper case 301, 302 Recessed portion 305 Snap fit portion 306 Bead 310 Clip 410 Safety valve cover 416 Fastening member 420 Seal 450 Sensor substrate 451 Mounting member 500 Gas exhaust pipe 601 Holding surface 602 Rib 701 Bottom surface 702 Rib

Claims (11)

A plurality of battery cells having a pair of electrode terminals;
A module for holding the plurality of battery cells;
A sensor substrate electrically connected to the pair of electrode terminals;
An assembled battery comprising: an upper case disposed on the outside of the module and the sensor substrate. The assembled battery according to claim 1,
The upper case is an assembled battery located outside the outer end of the rib of the module. The assembled battery according to claim 1 or 2,
An assembled battery further comprising fitting means for fitting the module and the upper case. The assembled battery according to claim 3,
The fitting means includes a snap fit portion included in the upper case and a rib included in the module. The assembled battery according to claim 3,
The fitting means is a battery pack including a bolt. The assembled battery according to claim 3,
The fitting means includes an assembled battery. The assembled battery according to any one of claims 1 to 6,
The module has a stepped portion,
The upper case is an assembled battery in contact with two surfaces of the stepped portion. The assembled battery according to claim 7,
The assembled battery, wherein a corner portion of the stepped portion has a chamfered shape. The assembled battery according to any one of claims 1 to 8,
The upper case has an assembled battery having a bead. The assembled battery according to claim 9,
The upper case is an assembled battery having the beads on the inner surface. The assembled battery according to claim 9 when dependent on claim 7 or 8,
The upper case includes the bead on an inner surface, and the bead contacts a surface different from the two surfaces of the stepped portion.