Battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack. The end plate is provided with a first direction and a second direction which are perpendicular to each other, the end plate comprises an end plate body, a first reinforcing part and a second reinforcing part, and the first reinforcing part and the second reinforcing part are connected to the two sides of the end plate body respectively in the second direction. One end of the first reinforcing part and one end of the second reinforcing part respectively extend out of the end plate body in the direction back to the top plate along the first direction; the first battery cell group comprises a top wall, the first battery cell group abuts against one side, deviating from the end plate body, of the first reinforcing part, and the top wall of the first battery cell group is arranged on the top plate; the second battery cell group comprises a top wall, the second battery cell group abuts against one side, deviating from the end plate body, of the second reinforcing part, and the top wall of the second battery cell group is arranged on the top plate. According to the battery pack provided by the utility model, in the production process, the first battery cell group and the second battery cell group can be restrained to arch upwards due to left-right pre-tightening force, so that the flatness of the bottoms of the first battery cell group and the second battery cell group is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery pack. Background Art

[0002] In recent years, new energy vehicles have emerged rapidly, which can save energy and reduce the deterioration of environmental problems to a certain extent. As the core component of new energy vehicles, power batteries play a vital role in saving energy and reducing the deterioration of environmental problems.

[0003] During the production process of the battery pack, when the battery cell is subjected to left and right pre-tightening forces, the bottom is prone to arch up and extend into the bottom of the middle end plate, resulting in the flatness of the bottom of the battery cell failing to meet product requirements. Utility Model Content

[0004] In view of this, the utility model provides a battery pack to solve the problem in the related art that the flatness of the bottom of the battery cell cannot meet the product requirements.

[0005] The utility model provides a battery pack, comprising:

[0006] A box body, wherein the box body comprises a top plate;

[0007] An end plate having a first direction and a second direction perpendicular to each other, the end plate comprising an end plate body, a first reinforcing portion, and a second reinforcing portion, wherein the first reinforcing portion and the second reinforcing portion are respectively connected to two sides of the end plate body along the second direction, and one end of the first reinforcing portion and the second reinforcing portion respectively extend out of the end plate body in a direction away from the top plate along the first direction;

[0008] A first battery cell group, the first battery cell group comprising a top wall, the first battery cell group abuts against a side of the first reinforcement portion away from the end plate body, and the top wall of the first battery cell group is disposed on the top plate;

[0009] A second battery cell group, the second battery cell group comprising a top wall, the second battery cell group abuts against a side of the second reinforcement portion away from the end plate body, and the top wall of the second battery cell group is disposed on the top plate;

[0010] The first direction is perpendicular to the second direction.

[0011] Beneficial effect: The first reinforcement part and the second reinforcement part can be extensions of the end plate body in the first direction, extending to the bottom end of the end plate body, and respectively abutting against the bottom of the side walls of the first battery cell group and the second battery cell group. During the production process, when subjected to the left and right preload forces in the second direction, the first reinforcement part can restrain the bottom of the battery cell of the first battery cell group from deforming in the second direction, and the second reinforcement part can restrain the bottom of the battery cell of the second battery cell group from deforming in the second direction, thereby preventing the bottom of the battery cell from arching toward the end plate body, thereby preventing the deformed battery cell from arching the end plate body upward and driving the battery cell to arch upward; therefore, the first reinforcement part and the second reinforcement part provided by the utility model can ensure the flatness of the bottom of the first battery cell group and the second battery cell group during the production process, ensure the yield rate of the battery pack, ensure that all battery packs flowing to the customer end are good products, and improve customer satisfaction.

[0012] In an optional embodiment, the first battery cell group also includes a bottom wall, and the bottom wall and the top wall are spaced apart along the first direction; the second battery cell group also includes a bottom wall, and the bottom wall and the top wall are spaced apart along the first direction; one end of the first reinforcement portion and the second reinforcement portion extend along the first direction and are flush with the bottom wall of the first battery cell group and the bottom wall of the second battery cell group.

[0013] In an optional embodiment, the first reinforcement portion is a first reinforcement plate extending along the first direction from the bottom end of the end plate body; the second reinforcement portion is a second reinforcement plate extending along the first direction from the bottom end of the end plate body.

[0014] Beneficial effect: The first reinforcing part is a first reinforcing plate, which can be in contact with the first battery cell group, thereby increasing the contact area and having a better restraining effect on the deformation of the battery cells of the first battery cell group. The second reinforcing part is a second reinforcing plate, which can be in contact with the second battery cell group, thereby increasing the contact area and having a better restraining effect on the deformation of the battery cells of the second battery cell group.

[0015] In an optional embodiment, the battery pack is also provided with a third direction, and the first reinforcing plate extends along the third direction to be flush with the two side walls of the first battery cell group; the second reinforcing plate extends along the third direction to be flush with the two side walls of the second battery cell group; wherein the first direction, the second direction and the third direction are arranged perpendicularly to each other.

[0016] Beneficial effects: The first reinforcing plate can fully restrain the battery cells of the first battery cell group and their two sides in the third direction to prevent local deformation thereof in the third direction; the second reinforcing plate can fully restrain the battery cells of the second battery cell group and their two sides in the third direction to prevent local deformation thereof in the third direction.

[0017] In an optional embodiment, the first battery cell group also includes a bottom wall, and the bottom wall and the top wall are spaced apart along the first direction; the second battery cell group also includes a bottom wall, and the bottom wall and the top wall are spaced apart along the first direction; in the first direction, the first reinforcing plate extends beyond the bottom wall of the first battery cell group; the second reinforcing plate extends beyond the bottom wall of the second battery cell group.

[0018] Beneficial effect: The first reinforcing plate extends beyond the bottom wall of the first battery cell group, that is, the first reinforcing plate extends out of the bottom wall of the first battery cell group in the first direction, and the extended portion is within a reasonable range, which can ensure that the entire bottom of the first battery cell group in the first direction is fully bound when subjected to a preload in the second direction, thereby preventing the bottom of the battery cell of the first battery cell group from being deformed. The second reinforcing plate extends beyond the bottom wall of the second battery cell group, that is, the second reinforcing plate extends out of the bottom wall of the second battery cell group in the first direction, and the extended portion is within a reasonable range, which can ensure that the entire bottom of the second battery cell group in the first direction is fully bound when subjected to a preload in the second direction, thereby preventing the bottom of the battery cell of the second battery cell group from being deformed.

[0019] In an optional embodiment, the first reinforcing plate extends along a third direction to outside the two side walls of the first battery cell group; and the second reinforcing plate extends along the third direction to outside the two side walls of the second battery cell group.

[0020] Beneficial effect: The first reinforcing plate extends beyond the two side walls of the first battery cell group along the third direction, that is, both sides of the first reinforcing plate in the third direction extend out of the two side walls of the first battery cell group, and the extended portion is within a reasonable range, which can ensure that the entire bottom of the first battery cell group in the third direction is fully bound when subjected to a preload in the second direction, thereby preventing the bottom of the battery cell of the first battery cell group from being deformed. The second reinforcing plate extends beyond the two side walls of the second battery cell group along the third direction, that is, both sides of the second reinforcing plate in the third direction extend out of the two side walls of the second battery cell group, and the extended portion is within a reasonable range, which can ensure that the entire bottom of the second battery cell group in the third direction is fully bound when subjected to a preload in the second direction, thereby preventing the bottom of the battery cell of the second battery cell group from being deformed.

[0021] In an optional embodiment, a third reinforcing portion is further included, which is arranged between the first reinforcing portion and the second reinforcing portion along the second direction and is connected to the first reinforcing portion and the second reinforcing portion respectively.

[0022] Beneficial effect: The third reinforcement part can increase the strength of the first reinforcement part and the second reinforcement part, thereby preventing the first reinforcement part and the second reinforcement part from being deformed, bent or damaged due to a large extrusion force.

[0023] In an optional embodiment, the first battery cell group also includes a bottom wall, and the bottom wall and the top wall are spaced apart along the first direction; the second battery cell group also includes a bottom wall, and the bottom wall and the top wall are spaced apart along the first direction; the third reinforcement portion is arranged on one end of the end plate body close to the bottom wall of the first battery cell group and the bottom wall of the second battery cell group along the first direction; in the first direction, the distance that the third reinforcement portion extends out of the end plate body is a first distance, and the distance that the first reinforcement portion and the second reinforcement portion extend out of the end plate body is a second distance, and the first distance is smaller than the second distance.

[0024] Beneficial effect: The third reinforcement part is arranged at one end of the end plate body close to the bottom wall of the first battery cell group and the bottom wall of the second battery cell group, which can increase the strength of the third reinforcement part itself and increase the strength and stability of the first reinforcement part and the second reinforcement part at the same time. The first distance is smaller than the second distance, and a smaller deformation space can be provided between the first reinforcement part and the second reinforcement part to achieve the effect of removing the large pre-tightening force brought by the battery cell groups on both sides.

[0025] In an optional embodiment, the third reinforcement portion includes:

[0026] a first reinforcing rib, two sides of which are respectively connected to the first reinforcing portion and the second reinforcing portion;

[0027] The second reinforcing rib has one side connected to one side of the first reinforcing rib and the first reinforcing portion, and the other side is spaced apart from the other side of the first reinforcing rib and connected to the second reinforcing portion; a triangular cavity is enclosed between the first reinforcing rib, the second reinforcing rib and the second reinforcing portion.

[0028] Beneficial effect: A triangular cavity is enclosed between the first reinforcing rib, the second reinforcing rib and the second reinforcing portion, and the strength and stability of the first reinforcing portion and the second reinforcing portion can be further enhanced by utilizing the stable characteristics of the triangle.

[0029] In an optional embodiment, the third reinforcement portion has two groups, which are respectively arranged on both sides of the end plate body along the third direction; wherein the first direction, the second direction and the third direction are arranged perpendicularly in pairs.

[0030] Beneficial effect: The two groups of third reinforcement parts can enhance the reinforcement effect of the first reinforcement part and the second reinforcement part from both sides of the third direction, avoiding deformation of the weak areas on both sides; and can further enhance the reinforcement effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 A schematic diagram of a partial structure of a battery pack according to an embodiment of the utility model from a first viewing angle;

[0033] Figure 2 A schematic diagram of a local structure of a battery pack according to an embodiment of the utility model from a second viewing angle;

[0034] Figure 3 A schematic diagram of a partial structure of a battery pack according to an embodiment of the utility model from a third viewing angle;

[0035] Figure 4 for Figure 3 A cross-sectional view of

[0036] Figure 5 It is a schematic diagram of an exploded installation of a battery pack according to an embodiment of the utility model from a first perspective;

[0037] Figure 6 It is a schematic diagram of an exploded installation of a battery pack according to an embodiment of the utility model from a second viewing angle;

[0038] Figure 7 for Figure 6 A partial enlarged view of middle A.

[0039] Description of reference numerals:

[0040] 1. End plate body; 2. First reinforcement part; 3. Second reinforcement part; 4. Third reinforcement part; 41. First reinforcement rib; 42. Second reinforcement rib; 100. First battery cell group; 200. Second battery cell group; 300. Side plate; 400. First end plate; 500. Second end plate; 600. Top plate. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0042] In the related art, the end plate structure is sandwiched between two groups of battery cell groups, and the end plate structure is shorter than the battery cell group in a first direction (up and down direction), and the bottom of the end plate structure is slightly higher than the bottom of the battery cell group. When subjected to the left and right pre-tightening force in the second direction (horizontal direction), the bottoms of the battery cells on both sides of the end plate structure will deform toward the middle, and exert an upward extrusion pressure on the end plate structure to arch the end plate structure upward. The upwardly arched end plate structure will drive the battery cells on both sides to arch upward to form an arc, resulting in the flatness of the bottom of the battery cell of the battery pack failing to meet product requirements, and the bottom of the battery pack cannot fit tightly with the heat dissipation adhesive, affecting the heat dissipation effect of the battery pack.

[0043] Combine the following Figures 1 to 7 , describing an embodiment of the utility model.

[0044] According to an embodiment of the utility model, a battery pack is provided, including a box body, the box body including a top plate 600; an end plate having a first direction and a second direction perpendicular to each other, the end plate including an end plate body 1, a first reinforcement portion 2, and a second reinforcement portion 3, wherein the first reinforcement portion 2 and the second reinforcement portion 3 are respectively connected to both sides of the end plate body 1 along the second direction, and one end of the first reinforcement portion 2 and the second reinforcement portion 3 respectively extend out of the end plate body 1 in a direction away from the top plate 600 along the first direction; a first battery cell group 100, the first battery cell group 100 including a top wall, the first battery cell group 100 abuts against a side of the first reinforcement portion 2 away from the end plate body 1, and the top wall of the first battery cell group 100 is arranged on the top plate 600; a second battery cell group 200, the second battery cell group 200 including a top wall, the second battery cell group 200 abuts against a side of the second reinforcement portion 3 away from the end plate body 1, and the top wall of the second battery cell group 200 is arranged on the top plate 600; wherein the first direction is perpendicular to the second direction.

[0045] The first reinforcing part 2 and the second reinforcing part 3 can be the extension of the end plate body 1 in the first direction, extending to the bottom of the end plate body 1, and respectively abutting against the bottom of the side wall of the first battery group 100 and the second battery group 200. During the production process, when subjected to the left and right preload in the second direction, the first reinforcing part 2 can restrain the bottom of the battery cell of the first battery group 100 from deforming in the second direction, and the second reinforcing part 3 can restrain the bottom of the battery cell of the second battery group 200 from deforming in the second direction, so as to prevent the bottom of the battery cell from arching toward the end plate body 1, thereby preventing the deformed battery cell from arching the end plate body 1 upward and driving the battery cell to arch upward; therefore, the first reinforcing part 2 and the second reinforcing part 3 provided in this embodiment can ensure the flatness of the bottom of the first battery group 100 and the second battery group 200 during the production process, so that the first battery group 100 and the second battery group 200 can be more closely attached to the heat dissipation adhesive, and ensure that the heat dissipation effect of the product meets the design requirements; ensure the yield rate of the battery pack, ensure that all the battery packs flowing to the client are good products, and improve customer satisfaction.

[0046] Specifically, in this embodiment, the first battery cell group 100 includes at least a number of battery cells arranged in sequence along the second direction; the second battery cell group 200 includes at least two battery cells arranged in sequence along the second direction; preferably, the number of battery cells in the first battery cell group 100 is consistent with the number of battery cells in the second battery cell group 200. The first direction is the height direction of the battery cells of the first battery cell group 100 and the second battery cell group 200, that is, the height direction of the end plate body 1; the second direction is the width direction of the battery cells of the first battery cell group 100 and the second battery cell group 200, that is, the width direction of the end plate body 1. That is to say, in this application, the first reinforcement part 2 and the second reinforcement part 3 are both located at the bottom end of the end plate body 1, and the first reinforcement part 2 and the second reinforcement part 3 are respectively located on both sides of the width direction of the end plate body 1. In this embodiment, the bottom of the first battery cell group 100 includes the bottom end and the bottom wall of the side wall of the first battery cell group 100; the bottom of the second battery cell group 200 includes the bottom end and the bottom wall of the side wall of the second battery cell group 200. In this embodiment, the battery pack is normally placed vertically along the first direction. The bottom of the first battery cell group 100 and the bottom of the second battery cell group 200 and the bottom of other structures mentioned in this embodiment are all the parts located at the bottom of the battery pack in the normal state. The bottom wall of the first battery cell group 100 is the side wall located at the bottom end of the battery pack in the normal state; the bottom wall of the second battery cell group 200 is the side wall located at the bottom end of the battery pack in the normal state.

[0047] In this embodiment, one end and one side are not technical concepts, but are used to define directions and positions. One end in the first direction and one side in the first direction can express the same position and the same area. For example, in this embodiment, "the first reinforcing portion 2 is connected to one end of the end plate body 1 along the first direction, and is located on one side of the end plate body 1 along the second direction" does not define the characteristics of one end and one side. It can also be written as "the first reinforcing portion 2 is connected to one side of the end plate body 1 along the first direction, and is located at one end of the end plate body 1 along the second direction", or "the first reinforcing portion 2 is connected to one end of the end plate body 1 along the first direction, and is located at one end of the end plate body 1 along the second direction"; it can also be written as "the first reinforcing portion 2 is connected to one side of the end plate body 1 along the first direction, and is located at one side of the end plate body 1 along the second direction".

[0048] In one embodiment, the first battery cell group further includes a bottom wall, which is spaced apart from the top wall along the first direction; the second battery cell group further includes a bottom wall, which is spaced apart from the top wall along the first direction; one end of the first reinforcement portion 2 and the second reinforcement portion 3 extends along the first direction and is flush with the bottom wall of the first battery cell group 100 and the second battery cell group 200. The flatness of the bottom of the first battery cell group 100 and the second battery cell group 200 can be better ensured.

[0049] In one embodiment, the first reinforcement portion 2 is a first reinforcement plate extending from the bottom end of the end plate body 1 along the first direction; the second reinforcement portion 3 is a second reinforcement plate extending from the bottom end of the end plate body 1 along the first direction.

[0050] The first reinforcing part 2 is a first reinforcing plate, which can be in contact with the first battery cell group 100, thereby increasing the contact area and better restraining the battery cells of the first battery cell group 100 from being deformed. The second reinforcing part 3 is a second reinforcing plate, which can be in contact with the second battery cell group 200, thereby increasing the contact area and better restraining the battery cells of the second battery cell group 200 from being deformed.

[0051] In one embodiment, the battery pack is further provided with a third direction, the first reinforcing plate extends along the third direction to be flush with the two side walls of the first battery cell group 100; the second reinforcing plate extends along the third direction to be flush with the two side walls of the second battery cell group 200; wherein the first direction, the second direction and the third direction are arranged perpendicularly to each other.

[0052] The first reinforcing plate can fully restrain the battery cells of the first battery cell group 100 and both sides thereof in the third direction to prevent local deformation thereof in the third direction; the second reinforcing plate can fully restrain the battery cells of the second battery cell group 200 and both sides thereof in the third direction to prevent local deformation thereof in the third direction.

[0053] Specifically, the third direction is the length direction of the battery cells of the first battery cell group 100 and the second battery cell group 200 .

[0054] In one embodiment, in the first direction, the first reinforcing plate extends beyond the bottom wall of the first battery cell group 100 ; and the second reinforcing plate extends beyond the bottom wall of the second battery cell group 200 .

[0055] The first reinforcing plate extends beyond the bottom wall of the first battery cell group 100, that is, the first reinforcing plate extends out of the bottom wall of the first battery cell group 100 in the first direction, and the extended portion is within a reasonable range, which can ensure that the entire bottom of the first battery cell group 100 in the first direction is fully bound when subjected to a preload in the second direction, and prevent the bottom of the battery cell of the first battery cell group 100 from being deformed. The second reinforcing plate extends beyond the bottom wall of the second battery cell group 200, that is, the second reinforcing plate extends out of the bottom wall of the second battery cell group 200 in the first direction, and the extended portion is within a reasonable range, which can ensure that the entire bottom of the second battery cell group 200 in the first direction is fully bound when subjected to a preload in the second direction, and prevent the bottom of the battery cell of the second battery cell group 200 from being deformed.

[0056] In one embodiment, the first reinforcing plate extends along the third direction to outside the two side walls of the first battery cell group 100 ; the second reinforcing plate extends along the third direction to outside the two side walls of the second battery cell group 200 .

[0057] The first reinforcing plate extends beyond the two side walls of the first battery cell group 100 along the third direction, that is, both sides of the first reinforcing plate in the third direction extend beyond the two side walls of the first battery cell group 100, and the extended portion is within a reasonable range, which can ensure that the entire bottom of the first battery cell group 100 in the third direction is fully bound when subjected to the preload in the second direction, and prevent the bottom of the battery cell of the first battery cell group 100 from being deformed. The second reinforcing plate extends beyond the two side walls of the second battery cell group 200 along the third direction, that is, both sides of the second reinforcing plate in the third direction extend beyond the two side walls of the second battery cell group 200, and the extended portion is within a reasonable range, which can ensure that the entire bottom of the second battery cell group 200 in the third direction is fully bound when subjected to the preload in the second direction, and prevent the bottom of the battery cell of the second battery cell group 200 from being deformed.

[0058] In one embodiment, the first reinforcement portion 2 and the second reinforcement portion 3 are symmetrically arranged relative to the end plate body 1 .

[0059] The symmetrically arranged first reinforcement part 2 and second reinforcement part 3 can exert the same restraining force, ensuring that the first battery cell group 100 and the second battery cell group 200 on both sides are subjected to a relatively uniform restraining force. The structure is simple and easy to form.

[0060] In one embodiment, a third reinforcing portion 4 is further included, which is disposed between the first reinforcing portion 2 and the second reinforcing portion 3 along the second direction and is connected to the first reinforcing portion 2 and the second reinforcing portion 3 respectively.

[0061] The third reinforcing portion 4 can increase the strength of the first reinforcing portion 2 and the second reinforcing portion 3 to prevent the first reinforcing portion 2 and the second reinforcing portion 3 from being deformed, bent or damaged due to a large extrusion force.

[0062] In one embodiment, the third reinforcing portion 4 is disposed along the first direction on one end of the end plate body 1 close to the bottom wall of the first battery cell group 100 and the bottom wall of the second battery cell group 200. In the first direction, the distance that the third reinforcing portion 4 extends out of the end plate body 1 is a first distance, and the distance that the first reinforcing portion 2 and the second reinforcing portion 3 extend out of the end plate body 1 is a second distance, and the first distance is smaller than the second distance.

[0063] The third reinforcement part 4 is disposed at one end of the end plate body 1 close to the bottom wall of the first battery cell group 100 and the bottom wall of the second battery cell group 200, which can increase the strength of the third reinforcement part 4 itself, and at the same time increase the strength and stability of the first reinforcement part 2 and the second reinforcement part 3. The first distance is smaller than the second distance, and a smaller deformation space can be provided between the first reinforcement part 2 and the second reinforcement part 3, so as to achieve the effect of removing the large pre-tightening force brought by the first battery cell group 100 and the second battery cell group 200.

[0064] In one embodiment, the third reinforcement portion 4 includes a first reinforcement rib 41 and a second reinforcement rib 42; the two sides of the first reinforcement rib 41 are respectively connected to the first reinforcement portion 2 and the second reinforcement portion 3; one side of the second reinforcement rib 42 is connected to one side of the first reinforcement rib 41 and the first reinforcement portion 2, and the other side is spaced apart from the other side of the first reinforcement rib 41 and connected to the second reinforcement portion 3; a triangular cavity is enclosed between the first reinforcement rib 41, the second reinforcement rib 42 and the second reinforcement portion 3.

[0065] A triangular cavity is enclosed between the first reinforcing rib 41 , the second reinforcing rib 42 and the second reinforcing portion 3 , and the strength and stability of the first reinforcing portion 2 and the second reinforcing portion 3 can be further enhanced by utilizing the stability of the triangle.

[0066] In one embodiment, the third reinforcing parts 4 have two groups, which are respectively arranged on both sides of the end plate body 1 along the third direction; wherein the first direction, the second direction and the third direction are arranged perpendicularly in pairs.

[0067] The two groups of third reinforcement parts 4 can enhance the reinforcement effect of the first reinforcement part 2 and the second reinforcement part 3 from both sides of the third direction, avoiding deformation of the weak areas on both sides; and can further enhance the reinforcement effect. Specifically, the third reinforcement part 4 can be one group, or three or more groups.

[0068] The battery pack further includes side plates 300, which are respectively arranged on both sides of the first battery cell group 100 and the second battery cell group 200 along the third direction. The battery pack further includes a first end plate 400 and a second end plate 500, wherein the first end plate 400 is arranged on a side of the first battery cell group 100 facing away from the end plate body 1, and the second end plate 500 is arranged on a side of the second battery cell group 200 facing away from the end plate body 1.

[0069] The power battery may include at least one group of the above-mentioned battery packs, and the bottom of the battery pack is tightly fitted with the heat dissipation glue of the power battery.

[0070] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A battery pack, characterized in that: include: A box body, the box body comprising a top plate (600); An end plate having a first direction and a second direction perpendicular to each other, the end plate comprising an end plate body (1), a first reinforcing portion (2), and a second reinforcing portion (3), wherein the first reinforcing portion (2) and the second reinforcing portion (3) are respectively connected to two sides of the end plate body (1) along the second direction, and one end of the first reinforcing portion (2) and the second reinforcing portion (3) respectively extend out of the end plate body (1) in a direction away from the top plate (600) along the first direction; A first battery cell group (100), the first battery cell group (100) comprising a top wall, the first battery cell group (100) abutting against a side of the first reinforcement portion (2) facing away from the end plate body (1), and the top wall of the first battery cell group (100) being arranged on the top plate (600); a second battery cell group (200), the second battery cell group (200) comprising a top wall, the second battery cell group (200) abutting against a side of the second reinforcement portion (3) facing away from the end plate body (1), and the top wall of the second battery cell group (200) being arranged on the top plate (600); The first direction is perpendicular to the second direction.

2. The battery pack according to claim 1, characterized in that: The first battery cell group (100) further comprises a bottom wall, the bottom wall being spaced apart from the top wall along the first direction; the second battery cell group (200) further comprises a bottom wall, the bottom wall being spaced apart from the top wall along the first direction; one end of the first reinforcing portion (2) and the second reinforcing portion (3) extending along the first direction and being flush with the bottom walls of the first battery cell group (100) and the second battery cell group (200).

3. The battery pack according to claim 1, characterized in that: The first reinforcing portion (2) is a first reinforcing plate extending along the first direction and arranged at the bottom end of the end plate body (1); the second reinforcing portion (3) is a second reinforcing plate extending along the first direction and arranged at the bottom end of the end plate body (1).

4. The battery pack according to claim 3, characterized in that: The battery pack is further provided with a third direction, the first reinforcing plate extending along the third direction to be flush with the two side walls of the first battery cell group (100); the second reinforcing plate extending along the third direction to be flush with the two side walls of the second battery cell group (200); Wherein, the first direction, the second direction and the third direction are arranged perpendicularly in pairs.

5. The battery pack according to claim 3, characterized in that: The first battery cell group (100) further comprises a bottom wall, wherein the bottom wall and the top wall are spaced apart along the first direction; the second battery cell group (200) further comprises a bottom wall, wherein the bottom wall and the top wall are spaced apart along the first direction; in the first direction, the first reinforcing plate extends beyond the bottom wall of the first battery cell group (100), and the second reinforcing plate extends beyond the bottom wall of the second battery cell group (200).

6. The battery pack according to claim 4, characterized in that: The first reinforcing plate extends along a third direction to outside the two side walls of the first battery cell group (100); and the second reinforcing plate extends along the third direction to outside the two side walls of the second battery cell group (200).

7. The battery pack according to any one of claims 1 to 6, characterized in that: It also includes a third reinforcing portion (4), which is arranged between the first reinforcing portion (2) and the second reinforcing portion (3) along the second direction and is respectively connected to the first reinforcing portion (2) and the second reinforcing portion (3).

8. The battery pack according to claim 7, characterized in that: The first battery cell group (100) further includes a bottom wall, and the bottom wall and the top wall are spaced apart along the first direction; the second battery cell group (200) further includes a bottom wall, and the bottom wall and the top wall are spaced apart along the first direction; the third reinforcing portion (4) is provided on one end of the end plate body (1) close to the bottom wall of the first battery cell group (100) and the bottom wall of the second battery cell group (200) along the first direction; in the first direction, the distance that the third reinforcing portion (4) extends out of the end plate body (1) is a first distance, and the distance that the first reinforcing portion and the second reinforcing portion extend out of the end plate body (1) is a second distance, and the first distance is smaller than the second distance.

9. The battery pack according to claim 8, characterized in that: The third reinforcement part (4) comprises: A first reinforcing rib (41), two sides of which are respectively connected to the first reinforcing portion (2) and the second reinforcing portion (3); A second reinforcing rib (42) has one side connected to one side of the first reinforcing rib (41) and the first reinforcing portion (2), and the other side is spaced apart from the other side of the first reinforcing rib (41) and connected to the second reinforcing portion (3); a triangular cavity is enclosed between the first reinforcing rib (41), the second reinforcing rib (42) and the second reinforcing portion (3).

10. The battery pack according to claim 9, characterized in that: The third reinforcing parts (4) have two groups, which are respectively arranged on both sides of the end plate body (1) along the third direction; wherein the first direction, the second direction and the third direction are arranged perpendicularly in pairs.

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