JP2018014301A - Battery module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery module capable of suppressing an excessive current from flowing even when it is submerged.SOLUTION: A battery module 1 includes: battery cells 11 having a positive electrode terminal 11a and a negative electrode terminal 11b; a monitoring ECU5 for monitoring voltages of the battery cells 11; and an overcurrent interrupting portion 7 having a case 71 and fuses 73 accommodated in the case 71. The case 71 has a waterproof structure. The positive electrode terminals 11a and the negative electrode terminals 11b of the battery cells 11 are connected to the monitoring ECU5 via fuses 73, respectively.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a battery module.

  In a battery module including a plurality of battery cells, the voltage of each battery cell is detected, and the state of each battery cell is monitored. For example, in the battery stack described in Patent Document 1, the electrode terminals of each unit cell are connected to a monitoring IC (Integrated Circuit) via a detection line, and the monitoring IC acquires the voltage values of each of the plurality of unit cells. doing. In this battery stack, the monitoring IC is mounted on a substrate on which a detection line is printed. In order to prevent an excessive current from flowing from the single cell to the monitoring IC, a fuse is provided on the detection line on the substrate.

JP, 2014-220157, A

  In order to improve the degree of freedom of arrangement of the substrate and the battery cell on which the monitoring IC or the like is mounted, the substrate and the battery cell may be connected by an electric wire via a connector provided on the substrate. In this configuration, for example, when the battery module is submerged, there is a possibility that a short circuit current flows due to a short circuit between the detection lines in the connector. In such a case, since the short-circuit current cannot be prevented with the fuse mounted on the substrate, it may not be possible to suppress an excessive current flow.

  The present invention provides a battery module capable of suppressing an excessive current from flowing even when submerged.

  A battery module according to an aspect of the present invention includes a battery cell having a positive electrode terminal and a negative electrode terminal, a control device that monitors the voltage of the battery cell, a first overcurrent interrupting element and a second overcurrent element housed in the case. An overcurrent cutoff unit having a current cutoff element. The case has a waterproof structure. The positive electrode terminal is electrically connected to the control device via the first overcurrent interruption element, and the negative electrode terminal is electrically connected to the control device via the second overcurrent interruption element.

  In this battery module, an overcurrent interruption element is provided between the electrode terminal of the battery cell and the control device. For this reason, even if the detection line for monitoring the voltage of the battery cell in the control device is short-circuited due to submergence, the short-circuit current passes through the overcurrent cutoff element. Moreover, since the overcurrent interruption | blocking element is accommodated in the case which has a waterproof structure, it is suppressed that a short circuit arises by submergence in an overcurrent interruption | blocking part. Thus, when the detection line is short-circuited due to submergence, the short-circuit current passes through the overcurrent cutoff element. When the short-circuit current is excessive, the detection line is interrupted by the overcurrent interrupting element, so that it is possible to suppress the excessive current from flowing.

  The battery module electrically connects the positive electrode terminal and the first overcurrent interrupting element, electrically connects the negative electrode terminal and the second overcurrent interrupting element, and the first overcurrent interrupting element. You may further provide the 2nd harness part which connects a 2nd overcurrent interruption | blocking element and a control apparatus while connecting an element and a control apparatus. In this case, the positive electrode terminal of the battery cell is connected to the control device via the first harness part, the first overcurrent interrupting element, and the second harness part. The negative electrode terminal of the battery cell is connected to the control device via the first harness part, the second overcurrent interrupting element, and the second harness part. For this reason, even if the detection line for monitoring the voltage of the battery cell in the control device is short-circuited due to submergence, the short-circuit current passes through the first overcurrent cutoff element or the second overcurrent cutoff element. Accordingly, when the short-circuit current is excessive, the detection line is interrupted by the first overcurrent interrupting element or the second overcurrent interrupting element, so that it is possible to suppress the excessive current from flowing. It becomes.

  The overcurrent interrupting unit may further include a first connector for connecting the first harness part and a second connector for connecting the second harness part. The first connector and the second connector may have a waterproof structure that prevents water from entering the case. In this case, the workability of connecting the first harness part and the second harness part to the overcurrent interrupting part can be improved by the first connector and the second connector. Moreover, since the 1st connector and the 2nd connector have a waterproof structure, it can suppress that water permeates into the inside of a case from the 1st connector and the 2nd connector.

  The overcurrent interrupting part may further include a first connector for connecting the first harness part and the second harness part. The first connector may have a waterproof structure that prevents water from entering the case. In this case, since the overcurrent interrupting part only needs to have one connector for connection with the first harness part and the second harness part, the overcurrent interrupting part can be reduced in size.

  The overcurrent interruption unit may further include a substrate housed in the case. The first overcurrent cutoff element and the second overcurrent cutoff element may be disposed on the substrate. In this case, by arranging the first overcurrent cutoff element and the second overcurrent cutoff element on the substrate, it becomes possible to handle the first overcurrent cutoff element and the second overcurrent cutoff element integrally. For this reason, it becomes possible to improve the assembly property of an overcurrent interruption | blocking part.

  According to the present invention, it is possible to suppress an excessive current from flowing even when submerged.

It is a perspective view of the battery module which concerns on one Embodiment. It is a top view of the battery module of FIG. It is a figure for demonstrating the connection relationship between monitoring ECU and a battery cell. It is a figure which shows the internal structure of an overcurrent interruption | blocking part. It is sectional drawing along the VV line of FIG. It is a figure which shows another structure of an overcurrent interruption | blocking part.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same reference numerals are used for the same or equivalent elements, and redundant descriptions are omitted.

  FIG. 1 is a perspective view of a battery module according to an embodiment. FIG. 2 is a plan view of the battery module of FIG. FIG. 3 is a diagram for explaining a connection relationship between the monitoring ECU and the battery cell. As shown in FIGS. 1 to 3, the battery module 1 includes an array body 2, an elastic member 3, a restraining member 4, a monitoring ECU (Electronic Control Unit) 5, a harness 6, and an overcurrent blocking unit 7. And a cover 8. The array body 2 is composed of, for example, seven battery cells 11. In FIG. 2, the monitoring ECU 5 and the cover 8 on the upper side of the array 2 are omitted from the battery module of FIG.

  The battery cell 11 is a battery in which an electrode assembly is accommodated in a rectangular box-like case. The battery cell 11 is a nonaqueous electrolyte secondary battery such as a lithium ion secondary battery. The plurality of battery cells 11 are arranged in the arrangement direction D. Each battery cell 11 is held by a resin cell holder 12. On the top surface of the case, a positive electrode terminal 11a and a negative electrode terminal 11b are provided apart from each other. The positive electrode terminal 11a is an electrode terminal connected to the positive electrode of the electrode assembly, and the negative electrode terminal 11b is an electrode terminal connected to the negative electrode of the electrode assembly. The adjacent battery cells 11 are arranged so that the positive electrode terminal 11 a and the negative electrode terminal 11 b are adjacent to each other, and the adjacent positive electrode terminal 11 a and the negative electrode terminal 11 b are electrically connected to each other by the bus bar 13. Thereby, the adjacent battery cells 11 are electrically connected in series. The battery cell 11 may be provided with a heat transfer plate for adjusting the temperature of the battery cell 11. A cover 8 is provided on the upper portion of the cell holder 12 so as to face the positive electrode terminal 11 a and the negative electrode terminal 11 b of the battery cell 11.

  The elastic member 3 is disposed at one end of the array body 2 in the array direction D of the battery cells 11. The elastic member 3 is a member used for the purpose of preventing the battery cell 11 from being damaged by a restraining load, and is made of, for example, a urethane rubber sponge. The elastic member 3 is a rectangular plate member. Examples of the material of the elastic member 3 include ethylene propylene diene rubber (EPDM), chloroprene rubber, and silicon rubber. The elastic member 3 is not limited to rubber, and may be a spring material or the like. The elastic member 3 may be disposed at both ends of the array 2 in the array direction D, or may be disposed between the battery cells 11 and 11 adjacent to each other.

  The restraining member 4 is a member for applying a restraining load to the array body 2 in the array direction D. The restraining member 4 includes a pair of end plates 41 and a plurality of connecting members 42. The pair of end plates 41 is a member for clamping the array 2 from both sides in the array direction D and fixing the battery module 1 to the housing of the battery pack. The end plate 41 is a plate-like member made of a metal material such as iron.

  The connecting member 42 connects the pair of end plates 41 to each other. The connecting member 42 is constituted by a bolt and a nut made of a metal such as iron. The bolts of the connecting members 42 are sequentially inserted into insertion holes (not shown) of one end plate 41, insertion holes 12a of the cell holders 12, and insertion holes (not shown) of the other end plate 41, and the other end. It is fastened with a nut outside the plate 41. By this fastening, a restraining load is applied to the array body 2 in the array direction D.

  The monitoring ECU 5 is a control device (controller) that monitors the voltage of each battery cell 11. The monitoring ECU 5 is placed on the cover 8. The monitoring ECU 5 is electrically connected to the positive terminal 11a and the negative terminal 11b of each battery cell 11 via the harness 6, and measures the voltage between the positive terminal 11a and the negative terminal 11b of each battery cell 11. . The monitoring ECU 5 controls the battery module 1 according to the voltage of the battery cell 11. For example, the monitoring ECU 5 controls the opening / closing operation of a relay (not shown) connected in series to the plurality of battery cells 11.

  The monitoring ECU 5 includes a substrate 51 and a connector 52. The board 51 is a printed board on which a wiring pattern 51a is printed. Circuit components such as a CPU (Central Processing Unit), a RAM (Random Access Memory), and a ROM (Read Only Memory) are mounted on the substrate 51. The connector 52 is a component for connecting the harness 6 and is provided at one end of the substrate 51. The connector 52 is, for example, a female connector, and has a shape in which a connector provided at an end portion on the monitoring ECU 5 side of a plurality of electric wires included in the second harness portion 62 described later can be fitted. The connector 52 has terminals (not shown) corresponding to the plurality of electric wires of the second harness portion 62. In the substrate 51, a wiring pattern 51 a is connected to each terminal of the connector 52.

  The harness 6 is used for voltage detection of the battery cell 11. The harness 6 includes a first harness part 61 and a second harness part 62. The first harness part 61 connects the positive electrode terminal 11 a and the negative electrode terminal 11 b of the battery cell 11 and the overcurrent blocking part 7. Specifically, the first harness portion 61 includes a plurality of electric wires 63. Each electric wire 63 electrically connects either the positive electrode terminal 11 a or the negative electrode terminal 11 b of the battery cell 11 to the connector 74 (see FIG. 4, first connector) of the overcurrent blocking unit 7. The electric wire 63 is connected to each of the positive electrode terminal 11 a and the negative electrode terminal 11 b of each battery cell 11. In the present embodiment, one electric wire 63 is connected to the positive terminal 11 a and the negative terminal 11 b that are electrically connected to each other by the bus bar 13. Moreover, one electric wire 63 is connected to the positive electrode terminal 11a and the negative electrode terminal 11b to which the bus bar 13 is not connected among the electrode terminals of the battery cell 11 located at both ends in the arrangement direction D of the array body 2. The plurality of electric wires 63 are covered and collected by a covering member, and a connector (not shown) is provided at an end portion of the plurality of electric wires 63 on the overcurrent blocking unit 7 side. That is, the first harness portion 61 electrically connects the positive electrode terminal 11a and a fuse 73 (see FIG. 4, first overcurrent interruption element) described later, and also connects the negative electrode terminal 11b and the fuse 73 (second overcurrent interruption). Device).

  The second harness portion 62 connects the overcurrent cutoff portion 7 and the monitoring ECU 5. Specifically, the second harness portion 62 includes a plurality of electric wires (not shown). Each electric wire electrically connects the connector 75 (see FIG. 4, the second connector) of the overcurrent interrupting unit 7 and the connector 52 of the monitoring ECU 5. The plurality of electric wires of the second harness portion 62 are covered and collected by a covering member, and connectors (not shown) are provided at both ends of the plurality of electric wires. That is, the second harness portion 62 electrically connects each fuse 73 (see FIG. 4) and the monitoring ECU 5. The 1st harness part 61 and the 2nd harness part 62 are wired along the sequence direction D of the battery cell 11, for example.

  The overcurrent interruption unit 7 is a part for interrupting the overcurrent flowing through the harness 6. The overcurrent interrupting part 7 is provided between the first harness part 61 and the second harness part 62. A detailed configuration of the overcurrent cutoff unit 7 will be described with reference to FIGS. 4 and 5.

  FIG. 4 is a diagram illustrating an internal configuration of the overcurrent cutoff unit. FIG. 5 is a cross-sectional view taken along line VV in FIG. In FIG. 4, the overcurrent cutoff unit 7 from which the upper casing 81 of the case 71 is removed is shown. FIG. 5 is a cross-sectional view of the overcurrent blocking unit 7 including the upper housing 81. As shown in FIGS. 4 and 5, the overcurrent interrupting unit 7 includes a case 71, a substrate 72, a plurality of fuses 73, a connector 74, and a connector 75. The case 71 is a rectangular box-shaped case and accommodates the substrate 72 and a plurality of fuses 73. The case 71 has a waterproof structure.

  Specifically, the case 71 includes an upper housing 81 and a lower housing 82. The upper housing 81 has a rectangular box shape having an opening on the lower side. Concave portions 81c and 81d are provided in a pair of side walls 81a and 81b facing each other of the upper casing 81. Grooves 81e and 81f are provided along the opening edges of the recesses 81c and 81d. The lower housing 82 has a rectangular box shape having an opening on the upper side. The opening of the lower housing 82 is the same size as the opening of the upper housing 81. The pair of side walls 82a and 82b facing each other of the lower housing 82 are provided with recesses 82c and 82d. Grooves 82e and 82f are provided along the opening edges of the recesses 82c and 82d.

  In the case 71, the opening of the upper housing 81 and the opening of the lower housing 82 are overlapped with each other. The recess 82c is positioned below the recess 81c, and the recess 81c and the recess 82c form an opening for exposing the opening of the connector 74 from the case 71. Similarly, the recess 82d is located below the recess 81d, and the recess 81d and the recess 82d form an opening for exposing the opening of the connector 75 from the case 71. The groove part 81e and the groove part 82e fit the protruding piece 74b of the connector 74 to fix the connector 74. The groove part 81f and the groove part 82f fit the protruding piece 75b of the connector 75 to fix the connector 75.

  The board 72 is a printed board on which a wiring pattern 72a is printed. A fuse 73 is provided on one surface 72 b of the substrate 72, a connector 74 is provided on one end 72 c of the substrate 72, and a connector 75 is provided on the other end 72 d of the substrate 72. The fuse 73 is an overcurrent cutoff element that prevents an excessive current from flowing. Since the fuse 73 is blown when an excessive current exceeding the rating of the fuse 73 flows, the current path through the fuse 73 is cut off. The fuse 73 is, for example, a surface mount type fuse. The plurality of fuses 73 are arranged at substantially equal intervals along the direction intersecting the direction from the one end 72c to the other end 72d.

  The connector 74 is a connector for connecting the first harness portion 61. A plurality of electric wires 63 are connected to the connector 74. The connector 74 is, for example, a female connector, and has a shape in which a connector provided at an end portion of the plurality of electric wires 63 on the overcurrent blocking portion 7 side can be fitted. The connector 74 has terminals (not shown) corresponding to the plurality of electric wires 63. The connector 74 has a waterproof structure that prevents water from entering the case 71. Specifically, the connector 74 has a main body portion 74a and a protruding piece 74b. The main body 74a has a cylindrical shape in which a connector provided at the end of the plurality of electric wires 63 on the overcurrent blocking unit 7 side can be fitted. The protruding piece 74b is a plate-like member erected on the outer peripheral surface of the main body 74a. The protruding piece 74b surrounds the main body 74a around the axis of the main body 74a.

  The connector 75 is a connector for connecting the second harness portion 62. A plurality of electric wires of the second harness portion 62 are connected to the connector 75. The connector 75 is, for example, a female connector, and has a shape in which a connector provided at an end portion of the plurality of electric wires included in the second harness portion 62 on the overcurrent blocking portion 7 side can be fitted. The connector 75 has terminals (not shown) corresponding to the plurality of electric wires included in the second harness portion 62. The connector 75 has a waterproof structure that prevents water from entering the case 71. Specifically, the connector 75 has a main body portion 75a and a protruding piece 75b. The main body 75a has a cylindrical shape in which a connector provided at an end of the plurality of electric wires included in the second harness portion 62 on the overcurrent blocking portion 7 side can be fitted. The protruding piece 75b is a plate-like member erected on the outer peripheral surface of the main body 75a. The protruding piece 75b surrounds the main body 75a around the axis of the main body 75a. The terminals of the connector 74 and the terminals of the connector 75 are electrically connected one-to-one by the wiring pattern 72 a through the fuse 73.

  A procedure for assembling the overcurrent interrupter 7 will be described. The opening of the connector 74 is exposed to the outside of the case 71 through the opening defined by the recess 81c and the recess 82c, and the opening of the connector 75 is passed through the opening defined by the recess 81d and the recess 82d. The substrate 72 is disposed between the upper housing 81 and the lower housing 82 so as to be exposed to the outside of the case 71. At this time, the protruding piece 74b of the connector 74 is fitted into the groove 81e of the upper casing 81 and the groove 82e of the lower casing 82, and the protruding piece 75b of the connector 75 is the groove 81f of the upper casing 81 and the groove of the lower casing 82. 82f. In this state, the upper casing 81 and the lower casing 82 are fixed by the adhesive material B. At this time, the protruding piece 74b, the groove 81e, and the groove 82e are fixed by the adhesive B, and the protruding piece 75b, the groove 81f, and the groove 82f are fixed by the adhesive B. Thereby, the airtightness of case 71 is ensured.

  In the battery module 1 configured as described above, the positive terminal 11 a of each battery cell 11 is electrically connected to the monitoring ECU 5 via the fuse 73, and the negative terminal 11 b of each battery cell 11 is connected to another fuse 73. Via the monitoring ECU 5. That is, the electric wire 63, the connector 74, the wiring pattern 72a, the fuse 73, the wiring pattern 72a, the connector 75, the electric wire of the second harness portion 62, the connector 52, and the wiring pattern 51a connected to each positive electrode terminal 11a and each negative electrode terminal 11b. Thus, a voltage detection line of the positive terminal 11a and the negative terminal 11b is configured. This detection line is a voltage detection line for monitoring the voltage of the battery cell 11.

  When the battery module 1 is submerged, the detection line may be short-circuited in the monitoring ECU 5. In particular, since the distance between the terminals of the connector 52 is short, if a short circuit occurs due to submersion, an overcurrent may flow as a short circuit current. In order to suppress this overcurrent, it is conceivable that the monitoring ECU 5 is housed in a case having a waterproof structure and the connector 52 is a connector having a waterproof structure. However, the case and the connector 52 are enlarged, and the mountability of the monitoring ECU 5 is reduced.

  On the other hand, in the battery module 1, the fuse 73 is provided between the positive terminal 11 a and the negative terminal 11 b of the battery cell 11 and the monitoring ECU 5. For this reason, even if the detection line in the monitoring ECU 5 is short-circuited due to submergence, the short-circuit current passes through the fuse 73. Moreover, since the fuse 73 is accommodated in the case 71 having a waterproof structure, even if the overcurrent interrupting part 7 is submerged, it is possible to prevent a short circuit from occurring in the overcurrent interrupting part 7. Thus, when the detection line is short-circuited due to submergence, the short-circuit current passes through the fuse 73. Specifically, the positive electrode terminal 11 a and the negative electrode terminal 11 b of each battery cell 11 are connected to the monitoring ECU 5 via the electric wire 63, the fuse 73, and the electric wire of the second harness part 62. For this reason, even if the detection line for monitoring the voltage of the battery cell 11 in the monitoring ECU 5 is short-circuited due to submergence, the short-circuit current passes through the electric wire 63, the fuse 73, and the electric wire of the second harness part 62. As a result, when the short circuit current is excessive, the detection line is interrupted by the fuse 73, so that it is possible to suppress the excessive current from flowing. In the battery module 1, the overcurrent blocking unit 7 may have a waterproof structure, and the battery module 1 can be downsized as compared with the case where the monitoring ECU 5 has a waterproof structure.

  Moreover, the overcurrent interrupting part 7 has a connector 74 for connecting the first harness part 61 and a connector 75 for connecting the second harness part 62. For this reason, the connector 74 and the connector 75 can improve the workability of the connection between the plurality of wires 63 and the plurality of wires of the second harness portion 62 and the overcurrent interrupting portion 7. Moreover, since the connector 74 and the connector 75 have a waterproof structure, it is possible to prevent water from entering the case 71 from the connector 74 and the connector 75.

  In addition, since the plurality of fuses 73 are arranged on the substrate 72, the plurality of fuses 73 can be handled integrally. For this reason, it becomes possible to improve the assembly property of the overcurrent interruption | blocking part 7. FIG.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment. For example, the battery module 1 may include one or more battery cells 11, the monitoring ECU 5, and the overcurrent cutoff unit 7.

  Further, instead of the fuse 73, an element capable of preventing overcurrent may be used. In the above embodiment, the fuse 73 is a surface mounting type, but may be a discrete mounting type having lead terminals.

  In addition, the overcurrent interrupting unit 7 may include a case 71 for each fuse 73. That is, each fuse 73 may be accommodated in different cases 71.

  The substrate 72 may be a multilayer substrate. In this case, since the substrate 72 can be reduced in size, the overcurrent interrupting unit 7 can be reduced in size.

  Further, the overcurrent cutoff unit 7 may not include the substrate 72. In this case, the fuse 73 and the terminal of the connector 74 may be connected by an electric wire, and the fuse 73 and the terminal of the connector 75 may be connected by an electric wire. Moreover, the fuse 73 and the electric wire 63 may be directly connected, and the fuse 73 and the electric wire of the 2nd harness part 62 may be directly connected.

  Further, as shown in FIG. 6, the overcurrent interruption unit 7 may include a connector 76 (first connector) for connecting the first harness unit 61 and the second harness unit 62. The connector 76 is, for example, a female connector, a connector provided at an end portion of the plurality of electric wires 63 on the overcurrent blocking portion 7 side, and an end of the second harness portion 62 on the overcurrent blocking portion 7 side of the plurality of electric wires. The connector provided in the part has a shape that can be fitted simultaneously. The connector 76 has terminals (not shown) corresponding to the plurality of electric wires 63 and terminals (not shown) corresponding to the plurality of electric wires of the second harness portion 62. The terminals corresponding to the electric wires 63 and the terminals corresponding to the electric wires included in the second harness portion 62 are electrically connected one-to-one by the wiring pattern 72 a via the fuse 73. The connector 76 has a waterproof structure that prevents water from entering the case 71. More specifically, the connector 76 has a main body 76a and a protruding piece 76b, like the connector 74 and the connector 75. The main body 76a has a cylindrical shape into which the above-described connector can be fitted. The protruding piece 76b is a plate-like member erected on the outer peripheral surface of the main body portion 76a. The protruding piece 76b surrounds the main body 76a around the axis of the main body 76a. In this case, the overcurrent cutoff unit 7 only needs to have one connector 76 for connection with the plurality of electric wires 63 and the plurality of electric wires of the second harness portion 62, so the overcurrent cutoff unit 7 can be reduced in size. Can be realized.

  DESCRIPTION OF SYMBOLS 1 ... Battery module, 5 ... Monitoring ECU (control apparatus), 7 ... Overcurrent interruption | blocking part, 11 ... Battery cell, 11a ... Positive electrode terminal, 11b ... Negative electrode terminal, 61 ... 1st harness part, 62 ... 2nd harness part, 63 ... Electric wire, 71 ... Case, 72 ... Substrate, 73 ... Fuse (first overcurrent interruption element, second overcurrent interruption element), 74 ... Connector (first connector), 75 ... Connector (second connector), 76 ... Connector (first connector).

Claims (5)

A battery cell having a positive terminal and a negative terminal;
A control device for monitoring the voltage of the battery cell;
An overcurrent cutoff unit having a case and a first overcurrent cutoff element and a second overcurrent cutoff element housed in the case;
With
The case has a waterproof structure,
The positive terminal is electrically connected to the control device via the first overcurrent interrupting element,
The negative electrode terminal is a battery module electrically connected to the control device via the second overcurrent interrupting element. A first harness part for electrically connecting the positive terminal and the first overcurrent interrupting element, and for electrically connecting the negative terminal and the second overcurrent interrupting element;
A second harness portion for connecting the first overcurrent cutoff element and the control device and for connecting the second overcurrent cutoff element and the control device;
The battery module according to claim 1, further comprising: The overcurrent interrupting part further includes a first connector for connecting the first harness part and a second connector for connecting the second harness part,
The battery module according to claim 2, wherein the first connector and the second connector have a waterproof structure that prevents water from entering the case. The overcurrent interruption part further includes a first connector for connecting the first harness part and the second harness part,
The battery module according to claim 2, wherein the first connector has a waterproof structure that prevents water from entering the case. The overcurrent interrupting unit further includes a substrate accommodated in the case,
The battery module according to any one of claims 1 to 4, wherein the first overcurrent cutoff element and the second overcurrent cutoff element are arranged on the substrate.

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