Battery module and energy storage equipment

Abstract

The utility model discloses a battery module and energy storage equipment, the battery module comprises a battery cell component, a plurality of battery cell brackets, a first bracket and a plurality of first conductive pieces, the battery cell component comprises a plurality of battery cells arranged along a first direction, each battery cell comprises a battery cell body and an electrode terminal, each electrode terminal comprises a welding part, and the welding parts are welded on the first bracket. A first opening through which the terminal extends out is formed between the adjacent battery cell brackets; the first bracket and the battery cell body are arranged along a second direction, the first bracket is provided with a first insulating part and a plurality of first through holes arranged at intervals, and the electrode terminals extend out of the first through holes; the first insulating part is located between the first conductive part and the battery cell body, the plurality of battery cells comprise first battery cells and second battery cells, and welding parts of the first battery cells and the second battery cells are connected to the same first conductive part and are located on one side, far away from the first insulating part, of the first conductive part. Therefore, the electrode terminal of the first battery cell is insulated from the conductive piece during dislocation or bending, so that the safety and the stability are improved.

Description

Technical Field

[0001] The embodiments of the present utility model relate to the technical field of energy storage, and in particular, to a battery module and an energy storage device. Background Art

[0002] With the popularization of electric vehicles, mobile devices, and other power-driven devices, the demand for battery modules is increasing day by day. As an important energy supply unit of these devices, the performance, safety, and structural rationality of the battery module have an important impact on the overall operation effect of the device. When assembling the battery module, the electrode terminals of the battery cells are prone to dislocation or bending, so it is necessary to strengthen the fixation of the battery cells in the battery cell module and the electrical connection between the battery cells. Content of the Utility Model

[0003] In order to solve the above technical problems, the embodiments of the present utility model provide a battery module and an energy storage device that can improve stability.

[0004] The embodiments of the present utility model solve its technical problems by adopting the following technical solutions:

[0005] A battery module includes a battery cell assembly, a plurality of battery cell brackets, a first bracket, and a plurality of first conductive members. The battery cell assembly includes a plurality of battery cells arranged in a first direction. Each battery cell includes a battery cell body and an electrode terminal extending out of the battery cell body. Each electrode terminal includes a welding portion. The battery cell bodies are arranged between adjacent battery cell brackets, and a first opening is formed between adjacent battery cell brackets. The electrode terminals extend out from the first opening. The first bracket is arranged in a second direction along with the battery cell body. The first bracket is provided with a first insulating member and a plurality of first through holes arranged at intervals. The first insulating member is arranged between two adjacent first through holes. The electrode terminals extend out from the first through holes. The second direction is perpendicular to the first direction. One conductive member is arranged on one first insulating member. Along the second direction, the first insulating member is located between the first conductive member and the battery cell body. Among them, the plurality of battery cells include a first battery cell and a second battery cell in the first direction. The electrode terminal of the second battery cell and the first insulating member are arranged at intervals. The welding portions of the first battery cell and the second battery cell are connected to the same first conductive member and are located on the side of the first conductive member away from the first insulating member.

[0006] In the above one or more optional embodiments, the electrode terminal of the first battery cell includes a first extension portion. Along the second direction, the first extension portion is located on the side of the first insulating member away from the first conductive member.

[0007] In one or more of the above optional embodiments, a plurality of battery cell brackets include a first battery cell bracket, a second battery cell bracket, and a third battery cell bracket that are adjacent to each other. The battery cell body of the first battery cell is located between the second battery cell bracket and the third battery cell bracket, and the battery cell body of the second battery cell is located between the first battery cell bracket and the second battery cell bracket; the electrode terminals of the first battery cell extend out from a first opening formed between the second battery cell bracket and the third battery cell bracket, and the electrode terminals of the second battery cell extend out from the first opening formed between the first battery cell bracket and the second battery cell bracket. Along the second direction, the projection of the first opening between the second battery cell bracket and the third battery cell bracket overlaps with the projection of the first insulating member.

[0008] In one or more of the above optional embodiments, along the direction opposite to the first direction, the first extension portion extends away from the second battery cell bracket.

[0009] In one or more of the above optional embodiments, the battery cell bracket includes a support portion, and a part of the first extension portion is disposed on the support portion of the third battery cell bracket.

[0010] In one or more of the above optional embodiments, the first insulating member includes a first insulating portion and a second insulating portion that are connected to each other. The first extension portion is located on the side of the first insulating portion away from the first conductive member, and the second insulating portion extends toward the battery cell body. Among them, along the first direction, the second insulating portion is located between the electrode terminal of the first battery cell and the second battery cell bracket.

[0011] In one or more of the above optional embodiments, the battery cell bracket includes an inclined portion that is adjacent to the support portion; the inclined portion of the third battery cell bracket is located between the electrode terminal of the first battery cell and the support portion of the third battery cell bracket; along the first direction, the distance between the support portion of the third battery cell bracket and the electrode terminal of the first battery cell gradually increases.

[0012] In one or more of the above optional embodiments, the first bracket further includes a plurality of second insulating members that are arranged at intervals along the first direction. Each second insulating member is located between two adjacent first through openings, and a first through opening is provided between the second insulating member and the adjacent first insulating member; the electrode terminal of the second battery cell includes a second extension portion. Along the second direction, the second extension portion is located between the second insulating member and the second battery cell bracket.

[0013] In one or more of the above optional embodiments, the second insulating member includes a third insulating portion. Along the second direction, there is a second gap between the third insulating portion and the second battery cell bracket, and a part of the second extension portion extends out from the second gap.

[0014] In one or more of the above optional embodiments, the second insulating member includes a fourth insulating portion connected to the third insulating portion. The fourth insulating portion extends toward the battery cell body. Along the first direction, the fourth insulating portion is located between the first battery cell bracket and the electrode terminal of the second battery cell.

[0015] In one or more of the above optional embodiments, along the second direction, the projection of the second insulating portion is separated from the projection of the first opening.

[0016] In one or more of the above optional embodiments, along the first direction, the second insulating portion is located between the electrode terminal of the first battery cell and the supporting portion of the second battery cell bracket.

[0017] In one or more of the above optional embodiments, the second insulating portion extends toward the battery cell body and abuts against the second battery cell bracket. In one or more of the above optional embodiments, the battery cell is a soft-pack battery cell.

[0018] A utility model provides an energy storage device, which includes the above-mentioned battery module.

[0019] The beneficial effects of the embodiments of the present utility model are as follows: The battery module provided by the embodiments of the present application includes a battery cell assembly, a plurality of battery cell brackets, a first bracket, and a plurality of first conductive members. The battery cell assembly includes a plurality of battery cells arranged along the first direction. Each battery cell includes a battery cell body and an electrode terminal extending out of the battery cell body. Each electrode terminal includes a welding portion. The battery cell bodies are arranged between adjacent battery cell brackets, and a first opening is formed between adjacent battery cell brackets. The electrode terminals extend out from the first opening. The first bracket and the battery cell body are arranged along the second direction. The first bracket is provided with a first insulating member and a plurality of first through-holes arranged at intervals. The first insulating member is arranged between two adjacent first through-holes. The electrode terminals extend out from the first through-holes. A conductive member is arranged on one first insulating member. Along the second direction, the first insulating member is located between the first conductive member and the battery cell body. Among them, the plurality of battery cells include a first battery cell and a second battery cell along the first direction. The electrode terminal of the second battery cell is separated from the first insulating member. The welding portions of the first battery cell and the second battery cell are connected to the same first conductive member and are located on the side of the first conductive member away from the first insulating member. In this way, under the action of the first bracket, it is beneficial to fix the battery cells and reduce the risk of deformation of the electrode terminals. Moreover, under the action of the plurality of first insulating members, it is beneficial for the electrode terminals of the first battery cells to be insulated from the first conductive members when the electrode terminals are misaligned or bent, which is convenient for power-on detection during the production of the battery module to screen out the first battery cells with abnormal assembly, and improves the safety and stability of the battery module. Description of the Drawings

[0020] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplary illustrations do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements. Unless otherwise stated, the drawings in the figures do not constitute a scale limitation.

[0021] Figure 1 is a schematic structural diagram of a battery module according to one embodiment of the present application;

[0022] Figure 2 is Figure 1 a schematic diagram after sectioning along the section line PP in

[0023] Figure 3 a schematic diagram when the electrode terminal of the battery cell is in a straight state;

[0024] Figure 4 is Figure 2 a view of a part in

[0025] Figure 5 is Figure 2 an enlarged view of part E in

[0026] Figure 6 a schematic diagram of a battery cell bracket;

[0027] Figure 7 is Figure 1 a schematic diagram of another perspective of the battery module of

[0028] Figure 8 is Figure 7 a structural exploded view of

[0029] Figure 9 a structural exploded view of a first support plate and a first conductive member;

[0030] Figure 10 a schematic diagram of the first conductive member being installed on the first support plate;

[0031] Figure 11 is Figure 2 a schematic diagram of a partial area of

[0032] In the figure: 1. Battery module; 2. Battery cell assembly; 3. Battery cell bracket; 4. First support; 5. First conductive member; 6. Second conductive member; 7. End wall; 8. Second support; 9. Third conductive member; 10. Binding strap;

[0033] 21. Battery cell; 22. Buffer member; 211. Battery cell body; 212. Electrode terminal; 21a. First battery cell; 21b. Second battery cell; 21c. Third battery cell;

[0034] 2121. First connection part; 2122. Extension part; 2123. Second connection part; 2124. Welding part; 2122a. First extension part; 2122b. Second extension part;

[0035] 31. Frame; 32. Support part; 33. Inclined part; 301. First opening; 302. Second opening; 3a. First battery cell bracket; 3b. Second battery cell bracket; 3c. Third battery cell bracket;

[0036] 41. First insulating part; 42. Second insulating part; 4a. First through - opening; 4b. First gap; 4c. Second gap; 4d. Positioning post;

[0037] 411. First insulating portion; 412. Second insulating portion;

[0038] 421. Third insulating portion; 422. Fourth insulating portion;

[0039] 5a. Positioning hole;

[0040] 8a. Second through - opening; 81. Third insulating part. Detailed implementation mode

[0041] For the convenience of understanding the present utility model, the present utility model will be described in more detail below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is expressed as "fixed to" another element, it can be directly on the other element, or there can be one or more intermediate elements therebetween. When an element is expressed as "connected to" another element, it can be directly connected to the other element, or there can be one or more intermediate elements therebetween. The terms "upper", "lower", "inner", "outer", "vertical", "horizontal", etc. used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0042] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the specification of the present utility model are only for the purpose of describing specific embodiments and are not used to limit the present utility model. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0043] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0044] As Figures 1-3 shown, a battery module 1 provided in one embodiment of the present application includes a cell assembly 2 and a plurality of cell brackets 3. The cell assembly 2 includes a plurality of cells 21 arranged in a first direction X. Each cell 21 includes a cell body 211 and electrode terminals 212 connected to the cell body 211, and the cell body 211 is disposed on the cell bracket 3.

[0045] Among them, two adjacent cell brackets 3 clamp the cell body 211 in the middle. At the first end 101 of the battery module 1, a first opening 301 is formed between two adjacent cell brackets 3, and the electrode terminals 212 extend out of the first opening 301 relative to the cell body 211, so as to facilitate the connection between the electrode terminals 212 of multiple cells 21.

[0046] In some embodiments, as Figure 3 shown, the cell 21 is a soft-pack cell.

[0047] In some embodiments, as Figure 3 shown, the cell 21 includes two electrode terminals 212. Along a second direction Y, the two electrode terminals 212 are respectively located at opposite ends of the cell body 211. One of the two electrode terminals 212 is a positive electrode terminal, and the other is a negative electrode terminal. In the present application, multiple adjacent cells 21 are connected in series. In other embodiments, adjacent cells 21 may be connected in parallel.

[0048] In some embodiments, the cell 21 includes two electrode terminals 212, and the two electrode terminals 212 are located at the same end of the cell body 211.

[0049] In some embodiments, as Figure 4 shown, the electrode terminals 212 located at the same end of the battery module 1 include a first connection portion 2121, an extension portion 2122, a second connection portion 2123, and a welding portion 2124 connected in sequence. The first connection portion 2121 is connected to the cell body 211, the extension portion 2122 is bent relative to the first connection portion 2121, and the extension portion 2122 extends along the first direction X.

[0050] In some embodiments, as Figure 2 And Figure 4As shown, the battery module 1 includes a first bracket 4, which is arranged along a second direction Y with the battery cell body 211, with the second direction Y being perpendicular to the first direction X. The first bracket 4 is provided with a first insulating member 41 and a plurality of spaced first openings 4a. The first insulating member 41 is positioned between two adjacent first openings 4a, and the electrode terminals 212 extend from the first openings 4a to facilitate connection between the electrode terminals 212 of adjacent battery cells 21. The first bracket facilitates securing the battery cells 21, reducing the risk of bending and deformation of the electrode terminals 212 of the battery cells 21 due to stress.

[0051] In some embodiments, as Figure 2 and Figure 4 As shown, the battery module 1 includes a plurality of first conductive members 5 disposed on a first bracket 4, each of which is disposed on a first insulating member 41. Along the second direction Y, the first insulating member 41 is located between the first conductive member 5 and the battery cell body 211. The first conductive member 5 is electrically connected to two adjacent battery cells 21.

[0052] For ease of description, please combine Figure 4 and Figure 5 The plurality of battery cells 21 are divided into a plurality of groups of first battery cells 21 a and second battery cells 21 b adjacently disposed along the first direction X. For ease of description, the extension portion 2122 of the first battery cell 21 a is named a first extension portion 2122 a , and the extension portion 2122 of the second battery cell 21 b is named a second extension portion 2122 b .

[0053] In some embodiments, as Figure 5 As shown, the electrode terminal 212 of the second battery cell 21b is spaced apart from the first insulating member 41, and the electrode terminal 212 of the second battery cell 21b is not connected to the first insulating member 41. The welding portion 2124 of the first battery cell 21a and the welding portion 2124 of the second battery cell 21b are connected to the same first conductive member 5 and are located on the side of the first conductive member 5 away from the first insulating member 41. This allows adjacent first and second battery cells 21a, 21b to be connected on the side of the first bracket 4 away from the battery cell assembly 2, thereby enabling adjacent first and second battery cells 21a, 21b to be connected in series or in parallel.

[0054] In some embodiments, as Figure 5 As shown, along the second direction Y, the first extension portion 2122a is located on a side of the first insulating member 41 away from the first conductive member 5. The first insulating member 41 can block the electrode terminal 212 of the first battery cell 21a.

[0055] The present application is provided with a plurality of first insulating members 41 for blocking, which is beneficial to insulating the electrode terminals 212 of the first battery cell 21a from the first conductive member 5 when the electrode terminals 212 are misaligned or bent, facilitating power-on detection during the production process of the battery module 1 to screen out the first battery cells 21a with abnormal assembly, and improving the safety and stability of the battery module 1.

[0056] In some embodiments, the polarities of the electrode terminals 212 of the first battery cell 21a and the electrode terminals 212 of the second battery cell 21b located at the same end of the battery module 1 are different. One of the electrode terminals 212 of the first battery cell 21a and the electrode terminals 212 of the second battery cell 21b has a positive polarity, and the other has a negative polarity. Thus, when the electrode terminals 212 of the first battery cell 21a and the electrode terminals 212 of the second battery cell 21b are both connected to the same first conductive member 5, the first battery cell 21a and the second battery cell 21b are connected in series. In the present application, the example of a plurality of battery cells 21 connected in series is described.

[0057] As Figure 5 shown, a plurality of battery cell brackets 3 include a first battery cell bracket 3a, a second battery cell bracket 3b, and a third battery cell bracket 3c arranged adjacent to each other.

[0058] In some embodiments, as Figure 5 shown, the second battery cell 21b is arranged between the first battery cell bracket 3a and the second battery cell bracket 3b, and the first battery cell 21a is arranged between the second battery cell bracket 3b and the third battery cell bracket 3c. The cell body 211 of the first battery cell 21a is arranged between the second battery cell bracket 3b and the third battery cell bracket 3c, and the electrode terminals 212 of the first battery cell 21a extend out from a first opening 301 formed by the second battery cell bracket 3b and the third battery cell bracket 3c. The cell body 211 of the second battery cell 21b is arranged between the first battery cell bracket 3a and the second battery cell bracket 3b, and the electrode terminals 212 of the second battery cell 21b extend out from the first opening 301 formed by the first battery cell bracket 3a and the second battery cell bracket 3b.

[0059] In some embodiments, as Figure 5 shown, along the second direction Y, the projection of the first opening 301 formed between the second battery cell bracket 3b and the third battery cell bracket 3c and the projection of the first insulating member 41 overlap, and along the second direction Y, the first insulating member 41 is located above the second battery cell bracket 3b and the third battery cell bracket 3c. Thus, it is beneficial that after the electrode terminals 212 of the first battery cell 21a extend out from the first opening 301 during the assembly process, they do not directly contact the first conductive member 5 due to the blocking of the first insulating member 41, reducing the assembly defect rate of the battery cells 21 in the battery module 1.

[0060] In some embodiments, as Figure 5As shown, along a direction opposite to the first direction X, the first extension portion 2122a extends away from the second battery cell bracket 3b.

[0061] In some embodiments, as Figure 5 As Figure 6 shown, each battery cell bracket 3 includes a frame body 31 and a support portion 32. The support portion 32 is provided at an end of the frame body 31, and the frame body 31 is used to accommodate the battery cell body 211. Among them, the support portion 32 plays a role in guiding and extending the electrode terminals 212 of the battery cell 21, and the support portion 32 plays a role in supporting the extension portion 2122 of the electrode terminals 212.

[0062] In some embodiments, as Figure 5 shown, a part of the first extension portion 2122a is provided on the support portion 32 of the third battery cell bracket 3c. The support portion 32 of the third battery cell bracket 3c plays a role in supporting the first extension portion 2122a, reducing the risk that the stability of the connection between the welding portion 2124 and the first conductive member 5 is affected due to the movement of the battery cell body 211 of the first battery cell 21a relative to the third battery cell bracket 3c during transportation, and is beneficial to improving the stability of the connection between the electrode terminals 212 of the battery cell 21 and the first conductive member 5.

[0063] In some embodiments, as Figure 6 shown, the battery cell bracket 3 includes an inclined portion 33. The inclined portion 33 is adjacent to the support portion 32, and the inclined portion 33 is configured to guide the electrode terminals 212 of the battery cell 21 to pass through the first through hole 4a of the first bracket 4 during the assembly of the battery module 1.

[0064] In some embodiments, as Figure 5 As Figure 6 shown, the inclined portion 33 of the third battery cell bracket 3c is located between the electrode terminals 212 of the first battery cell 21a and the support portion 32 of the third battery cell bracket 3c. Along the first direction X, the distance between the support portion 32 of the third battery cell bracket 3c and the electrode terminals 212 of the first battery cell 21a gradually increases.

[0065] In some embodiments, as Figure 5 shown, the first insulating member 41 includes a first insulating portion 411. The first extension portion 2122a is located on a side of the first insulating portion 411 away from the first conductive member 5. Along a direction opposite to the second direction Y, the first insulating portion 411 covers at least a part of the first extension portion 2122a. Optionally, the first insulating portion 411 extends along a direction opposite to the first direction X.

[0066] In some embodiments, as Figure 4 As Figure 5As shown, a first gap 4b is defined between the first insulating portion 411 and the support portion 32 of the third cell holder 3c. The first extension portion 2122a of the first battery cell 21a extends from the first gap 4b. The second connection portion 2123 of the first battery cell 21a passes through the first opening 4a, and the welding portion 2124 is connected to the first conductive member 5. The first insulating portion 411 and the support portion 32 of the third cell holder 3c jointly constrain the first extension portion 2122, reducing the risk of the electrode terminal 212 of the first battery cell 21a pulling on the battery body 211 of the first battery cell 21a, thereby enhancing the stability of the battery module 1.

[0067] In some embodiments, as Figure 4 and Figure 5 As shown, the first insulating member 41 includes a second insulating portion 412 connected to the first insulating portion 411 , and the second insulating portion 412 extends toward the cell body 211 .

[0068] In some embodiments, as Figure 4 and Figure 5 As shown, along the second direction Y, the projection of the second insulating portion 412 is separated from the projection of the first opening 301 , and the second insulating portion 412 avoids the first opening 301 in the second direction Y to reduce the risk of the electrode terminal 212 of the first battery cell 21a being obstructed when extending from the first opening 301 .

[0069] In some embodiments, as Figure 5 and Figure 6 As shown, along the first direction X, the second insulating portion 412 is located between the electrode terminal 212 of the first battery cell 21a and the support portion 32 of the second battery cell holder 3b. The second insulating portion 412 facilitates guiding the electrode terminal 212 of the first battery cell 21a to bend toward the first gap 4b during assembly, thereby guiding the electrode terminal 212 of the first battery cell 21a to bend and reducing the risk of the electrode terminal 212 of the first battery cell 21a bending toward the battery body 211 of the second battery cell 21a.

[0070] In some embodiments, as Figure 5 As shown, the second insulating portion 412 extends toward the cell body 211 and abuts against the second cell holder 3 b , which helps reduce the risk of the first extending portion 2122 a of the electrode terminal 212 of the second cell 21 b bending toward the second insulating portion 412 .

[0071] In some embodiments, as Figure 4As shown, the first bracket 4 includes a plurality of second insulating members 42. The plurality of second insulating members 42 are arranged at intervals along the first direction X. Each second insulating member 42 is located between two adjacent first through openings 4a. A first through opening 4a is provided between the second insulating member 42 and the adjacent first insulating member 41. Among them, the electrode terminal 212 of the second battery cell 21b extends out from the first through opening 4a between the first insulating member 41 and the second insulating member 42, and is connected to the electrode terminal 212 of the adjacent first battery cell 21a to the same first conductive member 5.

[0072] In this way, blocked by the second insulating member 42, the risk that the electrode terminal 212 of the second battery cell 21b bends in the direction of the first direction X and causes a short circuit with the electrode terminal 212 of another battery cell 21 is reduced, which is beneficial to improving the safety and stability of the battery module 1.

[0073] In some embodiments, as Figure 4 shown in Figure 5 the figure, the electrode terminal 212 of the second battery cell 21b includes a second extension portion 2122b. Along the second direction Y, the second extension portion 2122b is located between the second insulating member 42 and the second battery cell bracket 3b. It is beneficial for the second insulating member 42 and the second battery cell bracket 3b to jointly restrict the second extension portion 2122b, reducing the risk that the battery cell body 211 of the second battery cell 21b moves relative to the first bracket 4 and pulls the first conductive member 5.

[0074] In some embodiments, as Figure 4 shown in Figure 5 the figure, the second insulating member 42 includes a third insulating portion 421. The third insulating portion 421 extends towards the second battery cell bracket 3b. Along the second direction Y, there is a second gap 4c between the third insulating portion 421 and the second battery cell bracket 3b. A part of the second extension portion 2122b extends out from the second gap 4c. When the second battery cell 21b moves relative to the first bracket 4 during transportation, the second extension portion 2122b abuts against the support portion 32 of the second battery cell bracket 3b or the third insulating portion 421, which is beneficial to reducing the risk that the battery cell body 211 of the second battery cell 21b pulls the electrode terminal 212 of the second battery cell 21b, improving the welding stability between the electrode terminal 212 of the second battery cell 21b and the first conductive member 5, and enhancing the stability of the battery module 1.

[0075] In some embodiments, as Figure 5As shown, the second insulating member 42 includes a fourth insulating portion 422 connected to the third insulating portion 421, and the fourth insulating portion 422 extends toward the battery cell body 211. Along the first direction X, the fourth insulating portion 422 is located between the first battery cell bracket 3a and the electrode terminal 212 of the second battery cell 21b. Under the action of the fourth insulating portion 422, it is beneficial to prevent the second extension portion 2122b of the second battery cell 21b from bending toward the side where the first battery cell bracket 3a is located, reducing the risk that the electrode terminal 212 of the second battery cell 21b extends along the first direction X and is short-circuited with other battery cells.

[0076] In some embodiments, the second insulating member 42 is in an L shape. In some embodiments, the second insulating member 42 is in a T shape.

[0077] In some embodiments, as Figure 2 shown, among a plurality of battery cells 21 stacked along the first direction X, there are two third battery cells 21c. The third battery cells 21c are located at the ends of the plurality of battery cells 21 in the first direction X. The electrode terminals 212 of the two third battery cells 21c are respectively configured as the positive electrode and the negative electrode of the battery cell assembly 2. The positive electrode and the negative electrode terminals are used to connect to the positive connection terminal and the negative connection terminal of the electrical device.

[0078] In some embodiments, as Figures 7-8 shown, the battery module 1 includes two second conductive members 6. The two second conductive members 6 are respectively disposed at both ends of the side of the first bracket 4 facing away from the battery cell assembly 2. One second conductive member 6 is connected to the electrode terminal 212 of one third battery cell 21c.

[0079] In some embodiments, as Figures 7-8 shown, the battery module 1 includes two end walls 7. The two end walls 7 are respectively disposed on both sides of the battery cell assembly 2 along the first direction X, and the two end walls 7 are connected to the first bracket 4.

[0080] In some embodiments, first positioning structures are provided on both sides of the first bracket 4 in the third direction Z. Second positioning structures are provided at both ends of the first conductive member 5. The first positioning structure and the second positioning structure cooperate to quickly position and install the first conductive member 5 on the first bracket 4. The third direction Z is perpendicular to the first direction X and the second direction Y respectively. Exemplarily, as Figures 9-10 shown, the first positioning structure includes positioning posts 4d, the second positioning structure includes positioning holes 5a, and one positioning hole 5a is correspondingly provided for one positioning post 4d. For another example, the first positioning structure includes slots, and the second positioning structure includes plugs, and the plugs are inserted into the slots.

[0081] In some embodiments, the connection manner between the second conductive member 6 and the first bracket 4 is the same as the connection manner between the first conductive member 5 and the first bracket 4.

[0082] In some embodiments, as Figure 11 As shown, at the second end 102 of the battery module 1, a second opening 302 is formed on the other side of two adjacent battery cell holders 3. The electrode terminal 212 located on the other side of the battery cell body 211 extends from the second opening 302 to facilitate interconnection between the electrode terminals 212 of multiple battery cells 21. The electrode terminals 212 of adjacent battery cells 21 are connected in series.

[0083] In some embodiments, as Figure 2 and Figure 11 As shown, the battery module 1 includes a second bracket 8, which is disposed at one end of the battery cell bracket 3. The second bracket 8 and the first bracket 4 are arranged opposite each other in the second direction Y. The second bracket 8 has a plurality of second openings 8a spaced apart along the first direction X. The electrode terminals 212 of the plurality of battery cells 21 partially pass through the second bracket 8 through the second openings 8a, thereby facilitating connection between the electrode terminals 212 of the plurality of battery cells 21.

[0084] In some embodiments, as Figure 11 As shown, the second bracket 8 is provided with a plurality of third insulating members 81 . The third insulating members 81 are arranged at intervals along the first direction X, and each third insulating member 81 is arranged between two adjacent second through openings 8 a.

[0085] In some embodiments, as Figure 11 As shown, along the second direction Y, the projection of the third insulating member 81 overlaps with the projection of the second openings 302 formed by two adjacent battery cell holders 3, and the third insulating member 81 is located above the second openings 302. This facilitates the assembly process, where the electrode terminal 212 of the battery cell 21a, after extending out of the second opening 302, is blocked by the third insulating member 81 and bent toward the electrode terminal 212 of the other battery cell 21 to be connected, thereby reducing the risk of short circuit caused by random bending of the electrode terminal 212.

[0086] In some embodiments, the third insulating member 81 is in an L-shape. In other embodiments, the third insulating member 81 is in a T-shape.

[0087] In some embodiments, as Figure 11 As shown, the battery module 1 includes a plurality of third conductive members 9 spaced apart along a first direction X. The third conductive members 9 electrically connect the electrode terminals 212 of two adjacent battery cells 21. This facilitates support of the electrode terminals 212 of the battery cells 21 and reduces the risk of short circuits caused by the electrode terminals 212 of the battery cells 21 being bent.

[0088] In some embodiments, as Figure 2As shown, the battery cell assembly 2 includes a plurality of buffer members 22. Each buffer member 22 is disposed between the battery cell bodies 211 of two adjacent battery cells 21. The buffer member 22 is configured to be compressed after being deformed under pressure. The plurality of buffer members 22 can provide expandable space for the plurality of battery cells 21, reducing the risk of mutual extrusion of the battery cell bodies 211 of the plurality of battery cells 21 during charge and discharge. The buffer member 22 can be provided as needed, as long as it has the ability to be deformed under pressure. In some embodiments, the buffer member 22 is a foam.

[0089] In some embodiments, as Figures 1-2 shown, the battery module 1 includes a binding strap 10. The binding strap 10 surrounds the battery cell assembly 2 and the two end walls 7 to play a role in restraining the battery cell assembly 2, inhibiting the expansion of the battery cell assembly 2 during charge and discharge, and reducing the risk of the battery module 1 bulging.

[0090] Another embodiment of the energy storage device of the present application includes the battery module 1 in the above embodiment.

[0091] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A battery module, characterized in that, Comprising: A battery cell assembly, including a plurality of battery cells arranged in a first direction. Each battery cell includes a battery cell body and electrode terminals extending from the battery cell body, and each electrode terminal includes a welding portion. A plurality of battery cell brackets, with the battery cell body disposed between adjacent battery cell brackets. A first opening is formed between two adjacent battery cell brackets, and the electrode terminals extend out from the first opening. A first bracket, arranged in a second direction along with the battery cell body. The first bracket is provided with a first insulating member and a plurality of first through openings arranged at intervals. The first insulating member is disposed between two adjacent first through openings, and the electrode terminals extend out from the first through openings. The second direction is perpendicular to the first direction. A plurality of first conductive members, with one first conductive member disposed on one first insulating member. Along the second direction, the first insulating member is located between the first conductive member and the battery cell body. Among them, a plurality of the battery cells include a first battery cell and a second battery cell arranged adjacent to each other in the first direction. The electrode terminal of the second battery cell and the first insulating member are spaced apart. The welding portions of the first battery cell and the second battery cell are connected to the same first conductive member and are located on the side of the first conductive member away from the first insulating member.

2. The battery module according to claim 1, wherein The electrode terminal of the first battery cell includes a first extension portion. Along the second direction, the first extension portion is located on the side of the first insulating member away from the first conductive member.

3. The battery module according to claim 2, wherein The plurality of battery cell brackets include a first battery cell bracket, a second battery cell bracket, and a third battery cell bracket arranged adjacent to each other. The battery cell body of the first battery cell is located between the second battery cell bracket and the third battery cell bracket, and the battery cell body of the second battery cell is located between the first battery cell bracket and the second battery cell bracket. The electrode terminal of the first battery cell extends out from the first opening formed between the second battery cell bracket and the third battery cell bracket, and the electrode terminal of the second battery cell extends out from the first opening formed between the first battery cell bracket and the second battery cell bracket. Along the second direction, the projection of the first opening between the second battery cell bracket and the third battery cell bracket overlaps with the projection of the first insulating member.

4. The battery module according to claim 3, wherein, Along the direction opposite to the first direction, the first extension portion extends away from the second battery cell bracket.

5. The battery module according to claim 3, characterized in that, The battery cell bracket includes a support portion, and a part of the first extension portion is disposed on the support portion of the third battery cell bracket.

6. The battery module according to claim 5, characterized in that, [[ID=!1]]The first insulating member includes a connected first insulating portion and a second insulating portion. The first extension portion is located on the side of the first insulating portion away from the first conductive member, and the second insulating portion extends towards the battery cell body. Among them, along the first direction, the second insulating portion is located between the electrode terminal of the first battery cell and the second battery cell bracket.

7. The battery module according to claim 5, characterized in that, The battery cell bracket includes an inclined portion, and the inclined portion is adjacent to the support portion. The inclined portion of the third battery cell bracket is located between the electrode terminal of the first battery cell and the support portion of the third battery cell bracket. Along the first direction, the distance between the support portion of the third battery cell bracket and the electrode terminal of the first battery cell gradually increases.

8. The battery module according to any one of claims 2-7, characterized in that, The first bracket further includes a plurality of second insulating members, the plurality of second insulating members are arranged at intervals along a first direction, each second insulating member is located between two adjacent first through openings, and a first through opening is provided between the second insulating member and the adjacent first insulating member; The electrode terminal of the second battery cell includes a second extension portion, and along the second direction, the second extension portion is located between the second insulating member and the second battery cell bracket.

9. The battery module according to claim 8, wherein, The second insulating member includes a third insulating portion, and along the second direction, there is a second gap between the third insulating portion and the second battery cell bracket, and a part of the second extension portion extends out from the second gap.

10. An energy storage device, characterized in that, A battery module including any one of claims 1-9.

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