Battery module

Abstract

To bond a bus bar and a terminal of a battery cell to each other stably.SOLUTION: A battery module 10 includes a battery cell 100 including a terminal 120, a bus bar 200 electrically connected to the terminal 120, and a cover 300 that covers the terminal 120 and the bus bar 200 at least partially.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a battery module. [Background technology]

[0002] In recent years, various battery modules have been developed. Each battery module includes a plurality of battery cells.

[0003] Patent Document 1 describes a battery pack. The battery pack includes a plurality of unit batteries each having an electrode terminal, a bus bar electrically connected to the electrode terminals, and a bus bar holder that holds the bus bar. Junction holes are formed in the bus bar holder. The electrode terminals and the bus bar are electrically connected to each other via the junction holes.

[0004] Patent Document 2 describes a battery pack. The battery pack includes a plurality of battery cells, each having an electrode terminal, a bus bar electrically connected to the electrode terminals, and an inner cover that covers the plurality of battery cells. Terminal holes are formed in the inner cover. The electrode terminals and the bus bar are electrically connected to each other with the electrode terminals exposed from the terminal holes.

[0005] Patent Document 3 describes a battery module. The battery module includes a plurality of cell units each having a terminal, and a side plate arranged on a side surface of the plurality of cell units. A hole is formed in the side plate. A bus bar is attached to the side plate. The terminal and the bus bar are electrically connected to each other with the terminal inserted into the hole.

[0006] Patent Document 4 describes a battery pack. The battery pack includes a plurality of unit cells each having a terminal. The terminals of some of the unit cells are connected to each other, and the terminals of some of the other unit cells are connected to each other. The terminals of some of the unit cells and the terminals of some of the other unit cells are connected to each other via a conductive sheet. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2011-91035 A [Patent Document 2] JP 2015-56400 A [Patent Document 3] JP 2011-76871 A [Patent Document 4] Special Publication No. 2012-525665 Summary of the Invention [Problem to be solved by the invention]

[0008] In a battery module, terminals of battery cells and bus bars are sometimes joined to each other, and it is sometimes required that the terminals and the bus bars are joined stably.

[0009] One example of an object of the present invention is to stably join a terminal of a battery cell and a bus bar to each other. Other objects of the present invention will become apparent from the description of this specification. [Means for solving the problem]

[0010] One aspect of the present invention is as follows. 1. A battery cell having terminals; A bus bar electrically connected to the terminal; a cover at least partially covering the terminal and the bus bar; A battery module comprising: 2. The battery cell has a gas exhaust section for exhausting gas generated from inside the battery cell, 1. The battery module described in 1., wherein the cover is at least partially located between the terminal and the gas exhaust portion. 3. The battery module according to claim 1 or 2, wherein the cover and at least one of the terminal and the bus bar are attached to each other. 4. The battery module described in any one of 1. to 3., wherein the cover at least partially covers a plurality of the terminals of the plurality of the battery cells. 5. The battery module described in any one of 1. to 4., wherein the cover at least partially covers the plurality of bus bars. Effect of the Invention

[0011] According to the above aspect of the present invention, the terminal of the battery cell and the bus bar can be stably joined to each other. [Brief description of the drawings]

[0012] [Figure 1] FIG. 2 is a perspective view of a battery module according to the embodiment; [Diagram 2] FIG. 2 is a perspective view of a battery module according to an embodiment with the busbars and cover removed. [Diagram 3] 2 is a cross-sectional view taken along line AA in FIG. 1. [Figure 4] FIG. 13 is a perspective view of a battery module according to a first modified example. [Diagram 5] 5 is a cross-sectional view taken along a virtual plane S shown in FIG. [Figure 6] 11 is a schematic top view of a battery module according to Modification 2. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, embodiments and modifications of the present invention will be described with reference to the drawings. In all the drawings, similar components are given similar reference numerals and descriptions thereof will be omitted as appropriate.

[0014] Fig. 1 is a perspective view of a battery module 10 according to an embodiment. Fig. 2 is a perspective view of the battery module 10 according to an embodiment with a bus bar 200 and a cover 300 removed. Fig. 3 is a cross-sectional view taken along line AA in Fig. 1.

[0015] In each figure, the X direction, the Y direction, and the Z direction are shown for the purpose of explanation. The X direction indicates the front-rear direction of the battery module 10. The Y direction is perpendicular to the X direction. The Y direction indicates the left-right direction of the battery module 10. The Z direction is perpendicular to both the X direction and the Y direction. The Z direction indicates the up-down direction of the battery module 10. The arrows indicating the X direction, the arrows indicating the Y direction, and the arrows indicating the Z direction indicate the front, left, and up directions of the battery module 10, respectively. In FIG. 3, the white circle with a black dot indicating the Y direction indicates that the arrow indicating the Y direction extends from the back to the front of the paper. The relationship between the X direction, the Y direction, and the Z direction and the front-rear direction, left-right direction, and up-down direction of the battery module 10 is not limited to the example of the explanation according to the embodiment.

[0016] Hereinafter, as necessary, the side pointed to by an arrow indicating the X direction will be referred to as the +X side, and the side opposite the side pointed to by the arrow indicating the X direction will be referred to as the -X side. Hereinafter, as necessary, the side pointed to by an arrow indicating the Y direction will be referred to as the +Y side, and the side opposite the side pointed to by the arrow indicating the Y direction will be referred to as the -Y side. Hereinafter, as necessary, the side pointed to by an arrow indicating the Z direction will be referred to as the +Z side, and the side opposite the side pointed to by the arrow indicating the Z direction will be referred to as the -Z side.

[0017] The battery module 10 includes a plurality of battery cells 100, a pair of bus bars 200, and a pair of covers 300. Hereinafter, as necessary, the +X side bus bar 200 will be referred to as the first bus bar 200a, and the -X side bus bar 200 will be referred to as the second bus bar 200b. Hereinafter, as necessary, the +X side cover 300 will be referred to as the first cover 300a, and the -X side cover 300 will be referred to as the second cover 300b.

[0018] The plurality of battery cells 100 are stacked in the Y direction. The dimension of each battery cell 100 in the X direction is the dimension in the longitudinal direction of each battery cell 100. The dimension of each battery cell 100 in the Z direction is the dimension in the lateral direction of each battery cell 100. The dimension of each battery cell 100 in the Y direction is the dimension in the thickness direction of each battery cell 100. The shape of each battery cell 100 is not limited to this example. Two battery cells 100 are illustrated in FIG. 1 and FIG. 2. Hereinafter, as necessary, the battery cell 100 on the +Y side of the two battery cells 100 illustrated in FIG. 1 and FIG. 2 is referred to as the first battery cell 100a, and the battery cell 100 on the -Y side of the two battery cells 100 illustrated in FIG. 1 and FIG. 2 is referred to as the second battery cell 100b. In one example, the battery module 10 may include at least one other battery cell 100 not illustrated in FIG. 1 and FIG. 2 in addition to the first battery cell 100a and the second battery cell 100b. In this example, the first battery cell 100a, the second battery cell 100b, and at least one other battery cell 100 not shown in Figures 1 and 2 are stacked in the Y direction. However, the battery module 10 does not necessarily have to include any battery cells 100 other than the first battery cell 100a and the second battery cell 100b.

[0019] Each battery cell 100 has a battery element 110, a pair of terminals 120, a pair of cover materials 130, and an exterior film 140. Hereinafter, as necessary, the terminal 120 on the +X side of each battery cell 100 will be referred to as a first terminal 120a, and the terminal 120 on the -X side of each battery cell 100 will be referred to as a second terminal 120b. Hereinafter, as necessary, the cover material 130 on the +X side of each battery cell 100 will be referred to as a first cover material 130a, and the cover material 130 on the -X side of each battery cell 100 will be referred to as a second cover material 130b.

[0020] The battery element 110 has a substantially rectangular parallelepiped shape. The dimension of the battery element 110 in the X direction is the dimension in the longitudinal direction of the battery element 110. The dimension of the battery element 110 in the Z direction is the dimension in the lateral direction of the battery element 110. The dimension of the battery element 110 in the Y direction is the dimension in the thickness direction of the battery element 110. The shape of the battery element 110 is not limited to this example.

[0021] The battery element 110 has at least one positive electrode (not shown), at least one negative electrode (not shown), and at least one separator (not shown). For example, a plurality of positive electrodes and a plurality of negative electrodes are alternately stacked in the Y direction. At least a portion of the separator is located between the positive electrodes and the negative electrodes adjacent in the Y direction. For example, each of a plurality of sheet-like separators may be located between the positive electrodes and the negative electrodes adjacent in the Y direction. Alternatively, one sheet-like separator may be in a zigzag shape passing through the region between the positive electrodes and the negative electrodes adjacent in the Y direction. Alternatively, the positive electrode, the negative electrode, and the separator may be wound so that the separator is disposed between the positive electrode and the negative electrode. In one example, the positive electrode, the negative electrode, and the separator are wound in a state where both sides of one of the positive electrode and the negative electrode are covered by the separator. In another example, a laminate including a plurality of unit laminates including a positive electrode, a separator, and a negative electrode in this order may be wound. However, the winding structure of the positive electrode, negative electrode, and separator is not limited to these examples.

[0022] The battery cell 100 may be an all-solid-state battery. In an all-solid-state battery, a solid electrolyte layer is provided in a portion corresponding to a separator. An all-solid-state battery does not contain an electrolyte. Hereinafter, unless otherwise specified, the battery cell 100 will be described as a battery cell containing an electrolyte.

[0023] The pair of terminals 120 are located on both sides of the battery element 110 in the X direction. Each terminal 120 is a conductor such as a metal. One of the pair of terminals 120 and the positive electrode of the battery element 110 are electrically connected to each other. The other of the pair of terminals 120 and the negative electrode of the battery element 110 are electrically connected to each other. Thus, the polarities of the pair of terminals 120 of each battery element 110 are different from each other.

[0024] The pair of lid members 130 cover both end faces of the battery element 110 in the X direction. Each lid member 130 is, for example, a resin body. When viewed from the X direction, each lid member 130 has a substantially rectangular shape having a pair of short sides parallel to the Y direction and a pair of long sides parallel to the Z direction. The first terminal 120a at least partially protrudes toward the +X side from the +X side surface of the first lid member 130a when the first lid member 130a covers the +X side end face of the battery element 110. The second terminal 120b at least partially protrudes toward the -X side from the -X side surface of the second lid member 130b when the second lid member 130b covers the -X side end face of the battery element 110.

[0025] Each cover member 130 includes a valve 132. The valve 132 is located on the +Z side with respect to the terminal 120. However, the position where the valve 132 is provided is not limited to this example. When abnormal heat generation occurs in the battery cell 100, gas may be generated from inside the battery cell 100. For example, when abnormal heat generation occurs in the battery cell 100, gas may be generated from the battery element 110 or the electrolyte inside the battery cell 100. When gas is generated from inside the battery cell 100, the valve 132 opens and can discharge the gas from inside the battery cell 100 to the outside of the battery cell 100. Thus, the valve 132 serves as a gas discharge section for discharging the gas generated from inside the battery cell 100. In one example, the valve 132 is formed by partially thinning the thickness of the cover member 130. However, the structure of the valve 132 is not limited to this example.

[0026] The exterior film 140 is wrapped around the battery element 110 and the pair of lid members 130 in the X direction. The outer peripheral surface around the X direction of the lid member 130 on the +X side and the inner peripheral surface around the X direction of the end of the exterior film 140 on the +X side are joined to each other by a joining method such as heat fusion. The outer peripheral surface around the X direction of the lid member 130 on the -X side and the inner peripheral surface around the X direction of the end of the exterior film 140 on the -X side are joined to each other by a joining method such as heat fusion. Parts of the exterior film 140 are joined to each other by a joining method such as heat fusion at least in part around the X direction of the battery element 110. Thus, the battery element 110 is sealed by the exterior film 140.

[0027] The first battery cell 100a and the second battery cell 100b are connected in parallel via a pair of bus bars 200. Specifically, the first terminals 120a of each battery cell 100 have the same polarity, and the second terminals 120b of each battery cell 100 have the same polarity. The first battery cell 100a and the second battery cell 100b are connected in parallel with the first terminals 120a of each battery cell 100 electrically connected to each other via the first bus bar 200a and the second terminals 120b of each battery cell 100 electrically connected to each other via the second bus bar 200b.

[0028] The first busbar 200a is a conductor such as metal. The +Y side portion of the first busbar 200a and the first terminal 120a of the first battery cell 100a at least partially overlap each other in the X direction. The -X side surface of the +Y side portion of the first busbar 200a and the +X side surface of the first terminal 120a of the first battery cell 100a are joined to each other by a joining method such as laser welding. The -Y side portion of the first busbar 200a and the first terminal 120a of the second battery cell 100b at least overlap each other in the X direction. The -X side surface of the -Y side portion of the first busbar 200a and the +X side surface of the first terminal 120a of the second battery cell 100b are joined to each other by a joining method such as laser welding. The same applies to the second busbar 200b, the second terminal 120b of the first battery cell 100a, and the second terminal 120b of the second battery cell 100b.

[0029] 1 and 3, the first cover 300a at least partially covers the first terminal 120a of each battery cell 100 and the first bus bar 200a with at least a portion of the +X side surface of the first bus bar 200a exposed toward the +X side through the opening 302 of the first cover 300a. Therefore, the first cover 300a can hold the first bus bar 200a with the +Y side portion and the -Y side portion of the first bus bar 200a covering the first terminal 120a of the first battery cell 100a and the first terminal 120a of the second battery cell 100b, respectively. Therefore, the first cover 300a can function as a fixing jig when joining the first terminals 120a and the first bus bar 200a to each other by a joining method such as laser welding. For example, in a state in which each of first terminals 120a and first bus bar 200a are fixed to each other by first cover 300a, a laser can be irradiated from the +X side of first bus bar 200a through opening 302 of first cover 300a to weld each of first terminals 120a and first bus bar 200a to each other. Therefore, compared to a case in which first cover 300a is not provided, each of first terminals 120a and first bus bar 200a can be joined to each other more stably. The same applies to second cover 300b.

[0030] 1 and 3, the +Z side portion of the first cover 300a is at least partially located between the first terminal 120a of each of the first battery cell 100a and the second battery cell 100b and the valve 132 of the +X side cover member 130 of each of the first battery cell 100a and the second battery cell 100b. Therefore, even if relatively high temperature gas is discharged from the +X side valve 132, each of the first terminals 120a can be protected by the +Z side portion of the first cover 300a. The same applies to the second cover 300b.

[0031] As shown in FIG. 3, the first cover 300a includes a pair of first protrusions 312. The pair of first protrusions 312 are inserted into both end surfaces in the Z direction of the first terminal 120a of each battery cell 100. Thus, the pair of first protrusions 312 form an engagement structure that engages each first terminal 120a and the first cover 300a with each other. Therefore, each first terminal 120a and the first cover 300a are attached to each other via the pair of first protrusions 312. Thus, compared to a state in which each first terminal 120a and the first cover 300a are not attached to each other and the first cover 300a simply covers at least a portion of the first terminal 120a, the first cover 300a can stably hold the first bus bar 200a. However, the structure for attaching each first terminal 120a and the first cover 300a to each other is not limited to the pair of first protrusions 312. Alternatively, the first terminals 120a and the first cover 300a may not be attached to each other. The second cover 300b also includes a pair of first protrusions 312, similar to the first cover 300a. The second terminals 120b and the second cover 300b may or may not be attached to each other, similar to the first terminals 120a and the first cover 300a.

[0032] The first bus bar 200a and the first cover 300a may be attached to each other by a mounting structure such as an engagement structure. When the first bus bar 200a and the first cover 300a are attached to each other, the first cover 300a can stably hold the first bus bar 200a, compared to a state in which the first bus bar 200a and the first cover 300a are not attached to each other and the first cover 300a simply covers at least a part of the first bus bar 200a. When the first bus bar 200a and the first cover 300a are attached to each other, the first terminals 120a and the first cover 300a may or may not be attached to each other. The second terminals 120b and the second cover 300b may or may not be attached to each other in the same manner as the first terminals 120a and the first cover 300a.

[0033] As shown in Fig. 3, the first cover 300a includes a pair of second protrusions 314. The pair of second protrusions 314 are located on the +X side of both ends of the first bus bar 200a in the Z direction. Therefore, the pair of second protrusions 314 can prevent the first bus bar 200a from being removed toward the +X side of the first cover 300a through the opening 302 of the first cover 300a. The first cover 300a does not have to include the pair of second protrusions 314. The second cover 300b also includes a pair of second protrusions 314 in the same manner as the first cover 300a.

[0034] Fig. 4 is a perspective view of a battery module 10A according to Modification 1. Fig. 5 is a cross-sectional view of an imaginary plane S shown in Fig. 4. The imaginary plane S shown in Fig. 4 is perpendicular to the Z direction and is located at the center of the battery module 10A according to Modification 1 in the Z direction. The battery module 10A according to Modification 1 is similar to the battery module 10 according to the embodiment, except for the following points.

[0035] The battery module 10A according to the first modification includes a plurality of battery cells 100, a plurality of bus bars 200, and a plurality of covers 300A. Hereinafter, as necessary, the cover 300A on the +X side will be referred to as a first cover 300aA, and the cover 300A on the -X side will be referred to as a second cover 300bA.

[0036] As shown in FIG. 4 and FIG. 5, in the first modification, five battery cells 100 are stacked in the Y direction. However, the number and arrangement of the battery cells 100 are not limited to the example shown in FIG. 4 and FIG. 5. The five battery cells 100 are connected in series. Specifically, the second terminal 120b of the first battery cell 100 from the +Y side and the second terminal 120b of the second battery cell 100 from the +Y side are electrically connected to each other via the second bus bar 200b on the +Y side. The first terminal 120a of the second battery cell 100 from the +Y side and the first terminal 120a of the third battery cell 100 from the +Y side are electrically connected to each other via the first bus bar 200a on the +Y side. The second terminal 120b of the third battery cell 100 from the +Y side and the second terminal 120b of the fourth battery cell 100 from the +Y side are electrically connected to each other via the second bus bar 200b on the -Y side. The first terminal 120a of the fourth battery cell 100 from the +Y side and the first terminal 120a of the fifth battery cell 100 from the +Y side are electrically connected to each other via the first bus bar 200a on the -Y side.

[0037] As shown in Figures 4 and 5, the first cover 300aA at least partially covers the multiple first terminals 120a of the multiple battery cells 100 and the multiple first bus bars 200a, with at least a portion of the +X side surface of each first bus bar 200a being exposed toward the +X side through the opening 302A of the first cover 300aA. Therefore, the first cover 300aA can hold the +Y-side first busbar 200a and the -Y-side first busbar 200a in a state in which the +Y-side portion and the -Y-side portion of the +Y-side first busbar 200a cover the first terminal 120a of the second battery cell 100 from the +Y side and the first terminal 120a of the third battery cell 100 from the +Y side, respectively, and the +Y-side portion and the -Y-side portion of the -Y-side first busbar 200a cover the first terminal 120a of the fourth battery cell 100 from the +Y side and the first terminal 120a of the fifth battery cell 100 from the +Y side, respectively. Therefore, similarly to the embodiment, the first terminals 120a and the first busbar 200a can be stably joined to each other compared to a case in which the first cover 300aA is not provided. The same applies to the second cover 300bA.

[0038] 4 and 5, in the first modification, the first cover 300aA covers the first bus bars 200a. Specifically, the first cover 300aA collectively and at least partially covers all the first terminals 120a included in the battery module 10A and all the first bus bars 200a included in the battery module 10A. This makes it easier to manufacture the battery module 10A compared to a case in which the first bus bars 200a are individually covered by the first covers 300aA or the first terminals 120a are individually covered by the covers 300A. The same applies to the second cover 300bA.

[0039] 6 is a schematic top view of a battery module 10B according to Modification 2. The battery module 10B according to Modification 2 is similar to the battery module 10 according to the embodiment, except for the following points.

[0040] The battery module 10B according to the second modification includes four battery cells 100, two first bus bars 200a, one second bus bar 200b, two first covers 300a, and one second cover 300b. The four battery cells 100 are connected in series. Specifically, the first terminal 120a of the first battery cell 100 from the +Y side and the first terminal 120a of the second battery cell 100 from the +Y side are electrically connected to each other via the first bus bar 200a on the +Y side. The second terminal 120b of the second battery cell 100 from the +Y side and the second terminal 120b of the third battery cell 100 from the +Y side are electrically connected to each other via the second bus bar 200b. The first terminal 120a of the third battery cell 100 from the +Y side and the first terminal 120a of the fourth battery cell 100 from the +Y side are electrically connected to each other via the first bus bar 200a on the -Y side.

[0041] As in the embodiment, the first cover 300a on the +X side at least partially covers the first terminal 120a of the first battery cell 100 from the +Y side, the first terminal 120a of the second battery cell 100 from the +Y side, and the first bus bar 200a on the +X side. Therefore, as described in the embodiment, the first terminals 120a and the first bus bar 200a can be stably joined to each other, compared to a case in which the first cover 300a on the +X side is not provided. Similarly, the second cover 300b at least partially covers the second terminal 120b of the second battery cell 100 from the +Y side, the second terminal 120b of the third battery cell 100 from the +Y side, and the second bus bar 200b. Therefore, the second terminals 120b and the second bus bar 200b can be stably joined to each other, compared to a case in which the second cover 300b is not provided. Similarly, the -X-side first cover 300a at least partially covers the first terminal 120a of the third battery cell 100 from the +Y side, the first terminal 120a of the fourth battery cell 100 from the +Y side, and the -X-side first bus bar 200a. Therefore, as described in the embodiment, the first terminals 120a and the first bus bar 200a can be joined to each other more stably than when the -X-side first cover 300a is not provided.

[0042] Although the embodiment and modified examples of the present invention have been described above with reference to the drawings, these are merely examples of the present invention, and various configurations other than those described above can also be adopted.

[0043] The electrical connection of the multiple battery cells 100 is not limited to the electrical connection according to the embodiment, Modification 1, and Modification 2. The multiple battery cells 100 can be connected in series, in parallel, or in a combination of series and parallel via at least one bus bar 200.

[0044] In the embodiment, two battery cells 100 are connected in parallel. However, three or more battery cells 100 may be connected in parallel. In one example, the multiple battery cells 100 are stacked in the Y direction in a state where the first terminals 120a of the multiple battery cells 100 have the same polarity and the second terminals 120b of the multiple battery cells 100 have the same polarity. In this example, the multiple battery cells 100 are connected in parallel in a state where the first terminals 120a of the multiple battery cells 100 are electrically connected to each other via the first bus bar 200a and the second terminals 120b of the multiple battery cells 100 are electrically connected to each other via the second bus bar 200b. As in the embodiment, the first terminal 120a and the first bus bar 200a are at least partially covered by at least one cover on the +X side, and the second terminal 120b and the second bus bar 200b are at least partially covered by at least one cover on the -X side.

[0045] In the first modification, five battery cells 100 are connected in series, and in the second modification, four battery cells 100 are connected in series. However, two, three, or six or more battery cells 100 may be connected in series. In one example, the plurality of battery cells 100 are stacked in the Y direction in a state in which the polarities of the first terminals 120a of the battery cells 100 adjacent in the Y direction are different from each other, and the polarities of the second terminals 120b of the battery cells 100 adjacent in the Y direction are different from each other. In this example, the plurality of battery cells 100 are connected in series in order from the battery cell 100 at one end in the Y direction to the battery cell 100 at the other end in the Y direction in a state in which the first terminals 120a of the battery cells 100 adjacent in the Y direction are electrically connected to each other via the first bus bar 200a, or the second terminals 120b of the battery cells 100 adjacent in the Y direction are electrically connected to each other via the second bus bar 200b. Similar to variant 1 or variant 2, first terminal 120a and first bus bar 200a are at least partially covered by at least one cover on the +X side, and second terminal 120b and second bus bar 200b are at least partially covered by at least one cover on the -X side.

[0046] Alternatively, a plurality of cell groups including two battery cells 100 connected in parallel, such as the two battery cells 100 connected in parallel shown in the embodiment, may be stacked in the Y direction and connected in series. Cell groups adjacent to each other in the Y direction may be electrically connected to each other via a bus bar. As in the embodiment, modification 1, or modification 2, the terminals and bus bars of each cell group are at least partially covered by a cover. [Explanation of symbols]

[0047] 10, 10A, 10B battery module, 100 battery cell, 100a first battery cell, 100b second battery cell, 110 battery element, 120 terminal, 120a first terminal, 120b second terminal, 130 cover material, 130a first cover material, 130b second cover material, 132 valve, 140 exterior film, 200 bus bar, 200a first bus bar, 200b second bus bar, 300, 300A cover, 300a, 300aA first cover, 300b, 300bA second cover, 302, 302A opening, 312 first protrusion, 314 second protrusion

Claims

1. A battery cell having a terminal; A bus bar electrically connected to the terminal; a cover at least partially covering the terminal and the bus bar; A battery module comprising:

2. the battery cell has a gas exhaust portion for exhausting gas generated from inside the battery cell, The battery module according to claim 1 , wherein the cover is at least partially located between the terminal and the gas exhaust portion.

3. The battery module according to claim 1 , wherein the cover and at least one of the terminals and the bus bars are attached to each other.

4. The battery module according to claim 1 , wherein the cover at least partially covers the terminals of the battery cells.

5. The battery module according to claim 1 , wherein the cover at least partially covers the bus bars.

Images