Battery module and battery pack

Abstract

The utility model relates to the technical field of batteries, in particular to a battery module and a battery pack. The battery module provided by the utility model comprises a first bracket, a plurality of battery cells and a first busbar, the first busbar is arranged on one side, deviating from the battery cell, of the first bracket, and the first pole is welded with the first busbar to form a first welding part; a plurality of first grooves are formed in the side, away from the battery cell, of the first support, the first busbar covers at least part of the first grooves, and the first grooves are located between every two adjacent first welding parts. When the strength of the welding spot of the first welding part needs to be checked, a tool is used to extend into the first groove to pick up part of the first busbar for checking.

Description

Technical Field

[0001] The present disclosure relates to the field of battery technology, and in particular to a battery module and a battery pack. Background Art

[0002] In order to meet the growing demand for high-power discharge, current battery modules usually include multiple cells, which are connected in series or in parallel through a busbar. In traditional battery modules, after the cells and busbars are welded, the welds cannot be inspected, and it is impossible to know whether the welding is reliable. Summary of the invention

[0003] The present disclosure provides a battery module and a battery pack to at least solve the above technical problems existing in the prior art.

[0004] A first aspect of the present disclosure provides a battery module, comprising: a first bracket, a plurality of battery cells and a first busbar;

[0005] A plurality of first mounting positions are provided on one side of the first bracket corresponding to the battery cell, and one end of the battery cell is mounted at the corresponding first mounting position;

[0006] The first bracket is provided with a plurality of first hollow portions, and the first hollow portions penetrate the first mounting position so that the first pole of the battery cell can be exposed from the first hollow portions;

[0007] The first busbar is arranged on a side of the first bracket away from the battery core, and the first pole is welded to the first busbar to form a first welding portion;

[0008] A plurality of first grooves are provided on a side of the first bracket facing away from the battery core. The first busbar covers at least a portion of the first grooves. The first grooves are located between two adjacent first welding portions.

[0009] Furthermore, the first bracket is provided with a first mounting groove, the first bus is arranged in the first mounting groove, the first groove includes a first bottom wall, and a first avoidance gap is provided between the first bottom wall and the first bus.

[0010] Furthermore, the first bracket is provided with a first limiting portion, and the first limiting portion is used to limit the first pole;

[0011] Along the height direction of the battery core, at least a portion of the first limiting portion is projected into the first hollow portion.

[0012] Furthermore, the first limiting portion is a block-shaped body extending from the first bracket, and a plurality of the first limiting portions are distributed around the pole.

[0013] Furthermore, it also includes a second bracket, the first bracket and the second bracket are connected to each other, and a receiving cavity for receiving the battery cell is defined between the second bracket and the first bracket;

[0014] Wherein, a plurality of second mounting positions are provided on one side of the second bracket corresponding to the battery cell, and one end of the battery cell away from the first bracket is mounted at the corresponding second mounting position.

[0015] Furthermore, the second bracket is provided with a plurality of second hollow portions, and the second hollow portions penetrate the second mounting position so that the second pole of the battery cell can be exposed from the second hollow portions;

[0016] The second busbar is arranged on a side of the second bracket away from the battery core, and the second pole is welded to the second busbar to form a second welding portion;

[0017] A plurality of second grooves are provided on a side of the second bracket facing away from the battery core. The second busbar covers at least a portion of the second grooves. The second grooves are located between two adjacent second welding portions.

[0018] Furthermore, the second bracket is provided with a second mounting groove, the second busbar is arranged in the second mounting groove, the second groove includes a second bottom wall, and a second avoidance gap is provided between the second bottom wall and the second busbar;

[0019] And / or, the second bracket is provided with a second limiting portion, the second limiting portion is used to limit the second pole, and along the height direction of the battery cell, at least a portion of the second limiting portion is projected into the second hollow portion.

[0020] Furthermore, the second limiting portion is a block-shaped body extending from the second bracket, and a plurality of the second limiting portions are distributed around the pole.

[0021] Furthermore, the battery cell is a cylindrical battery cell.

[0022] A second aspect of the present disclosure provides a battery pack, comprising the battery module described in the first aspect.

[0023] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0024] The battery module provided by the embodiment of the present disclosure includes a first bracket, a plurality of battery cells and a first busbar; a plurality of first mounting positions are provided on one side of the first bracket corresponding to the battery cells, and one end of the battery cell is installed at the corresponding first mounting position; a plurality of first hollow portions are provided on the first bracket, and the first hollow portions penetrate the first mounting position so that the first pole of the battery cell can be exposed from the first hollow portions; the first busbar is provided on the side of the first bracket away from the battery cell, and the first pole is welded to the first busbar to form a first welding portion; a plurality of first grooves are provided on the side of the first bracket away from the battery cell, and the first busbar covers at least part of the first grooves, and the first groove is located between two adjacent first welding portions. When it is necessary to check the strength of the weld point of the first welding portion, a tool can be used to extend into the first groove to pick up part of the first busbar for inspection.

[0025] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, in which:

[0027] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.

[0028] Figure 1 The structure of the battery module provided by the embodiment of the present disclosure is shown in FIG. Figure 1 ;

[0029] Figure 2 The structure of the battery module provided by the embodiment of the present disclosure is shown in FIG. Figure 2 ;

[0030] Figure 3 A schematic diagram showing the structure of a battery module provided by an embodiment of the present disclosure with part of the first bus bar removed;

[0031] Figure 4 A schematic diagram showing the structure of a battery module provided by an embodiment of the present disclosure with part of the second bus bar removed;

[0032] Figure 5 A schematic structural diagram of the first bracket and the first bus bar is shown.

[0033] Explanation of the numbers in the figure: 1. first bracket; 11. first mounting position; 12. first hollow portion; 13. first groove; 131. first bottom wall; 14. first limiting portion; 15. first mounting groove; 16. first bus; 2. second bracket; 22. second hollow portion; 23. second groove; 231. second bottom wall; 24. second limiting portion; 25. second mounting groove; 26. second bus; 3. battery cell. DETAILED DESCRIPTION

[0034] In order to make the purpose, features, and advantages of the present disclosure more obvious and easy to understand, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.

[0035] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the battery module provided by the embodiment of the present disclosure includes a first bracket 1, a plurality of battery cells 3 and a first busbar 16; a plurality of first mounting positions 11 are provided on one side of the first bracket 1 corresponding to the battery cells 3, one end of the battery cells 3 is installed at the corresponding first mounting position 11, and the first mounting position 11 can be a hole-shaped structure, a through hole, or a blind hole; the first bracket 1 is provided with a plurality of first hollow portions 12, and the first hollow portions 12 penetrate the first mounting position 11 so that the first pole of the battery cell 3 can be exposed from the first hollow portions 12; the first busbar 16 is provided on the side of the first bracket 1 away from the battery cells 3, and the first pole is welded to the first busbar 16 to form a first welding portion; a plurality of first grooves 13 are provided on the side of the first bracket 1 away from the battery cells 3, and the first busbar 16 covers at least part of the first groove 13, and the first groove 13 is located between two adjacent first welding portions. When it is necessary to check the strength of the weld point of the first welding portion, a tool can be used to extend into the first groove 13 to pick up part of the first busbar 16 for inspection. In the embodiment of the present disclosure, a downward first groove 13 structure is formed on the first bracket 1, which does not affect the function and structure of the entire product and can reduce material costs; it only needs to be checked with simple tools during use, which reduces manufacturing costs; the welding strength of the first welding part of each battery cell 3 can be checked to ensure product reliability; the same first groove 13 position can be used to check the welding strength of the first welding parts of two battery cells 3, which improves efficiency.

[0036] Specifically, in the embodiment of the present disclosure, a first groove 13 is set at the position of the first bracket 1 between the battery cells 3 to reserve downward space, and a part of the first bus 16 is suspended in the air. The suspended position of the first bus 16 is moved with a tool, so that the strength of the solder joint of the first welding part of each battery cell 3 can be checked.

[0037] In some specific embodiments, the first bracket 1 is provided with a first mounting groove 15, the first busbar 16 is provided in the first mounting groove 15, the first groove 13 includes a first bottom wall 131, and a first avoidance gap is provided between the first bottom wall 131 and the first busbar 16. When it is necessary to check the welding strength of the first welding portion of the battery cell 3, a tool is inserted into the first avoidance gap, and the suspended position of the first busbar 16 is moved, so that the strength of the welding point of the first welding portion of each battery cell 3 can be checked.

[0038] In some specific embodiments, the first bracket 1 is provided with a first limiting portion 14, which is used to limit the first pole; along the height direction of the battery cell 3, at least part of the projection of the first limiting portion 14 falls into the first hollow portion 12, and the first limiting portion 14 can limit the first pole or the battery cell 3 to reduce the possibility of movement of the battery cell 3.

[0039] In some specific embodiments, the first limiting portion 14 is a block extending from the first bracket 1 , and a plurality of first limiting portions 14 are distributed around the pole, which can limit the freedom of the battery cell 3 and reduce the possibility of movement of the battery cell 3 .

[0040] The first pole can be a positive pole or a negative pole.

[0041] In some specific embodiments, the battery module further includes a second bracket 2, the first bracket 1 and the second bracket 2 are connected in abutment, and a receiving cavity for receiving the battery cell 3 is defined between the second bracket 2 and the first bracket 1; wherein, a plurality of second mounting positions are provided on one side of the second bracket 2 corresponding to the battery cell 3, and the second mounting position can be a hole-shaped structure, a through hole, or a blind hole. One end of the battery cell 3 away from the first bracket 1 is mounted at the corresponding second mounting position. The first bracket 1 and the second bracket 2 can be fixed by fasteners, so as to clamp and fix the battery cell 3 between the two to form a module.

[0042] In some specific embodiments, the second bracket 2 is provided with a plurality of second hollow portions 22, and the second hollow portions 22 penetrate the second mounting position so that the second pole of the battery cell 3 can be exposed from the second hollow portion 22; the second busbar 26 is arranged on the side of the second bracket 2 away from the battery cell 3, and the second pole is welded to the second busbar 26 to form a second welding portion; the second bracket 2 is provided with a plurality of second grooves 23 on the side away from the battery cell 3, and the second busbar 26 covers at least part of the second groove 23, and the second groove 23 is located between two adjacent second welding portions. In the embodiment of the present disclosure, an upward second groove 23 structure is made on the second bracket 2, which does not affect the function and structure of the entire product and can reduce the material cost; it only needs to be checked with simple tools when in use, which reduces the manufacturing cost; the welding strength of the second welding portion of each battery cell 3 can be checked to ensure product reliability; the welding strength of the second welding portions of two battery cells 3 can be checked at the same second groove 23 position, which improves efficiency.

[0043] Specifically, in the disclosed embodiment, a second groove 23 is provided at the position of the second bracket 2 between the battery cells 3 to reserve downward space, and a portion of the second bus 26 is suspended in the air. By using a tool to move the suspended position of the second bus 26, the strength of the solder joint of the second welding portion of each battery cell 3 can be checked.

[0044] The second pole can be a positive pole or a negative pole.

[0045] The row shapes of the plurality of first mounting positions 11 may be the same or different, and the row shapes of the plurality of second mounting positions may be the same or different.

[0046] In some specific embodiments, the second bracket 2 is provided with a second mounting groove 25, the second bus 26 is arranged in the second mounting groove 25, the second groove 23 includes a second bottom wall 231, and a second avoidance gap is provided between the second bottom wall 231 and the second bus 26; when it is necessary to check the welding strength of the battery cell 3, a tool is inserted into the second avoidance gap, and the suspended position of the second bus 26 is moved, so that the strength of the solder joint of each battery cell 3 can be checked.

[0047] In some specific embodiments, the second bracket 2 is provided with a second limiting portion 24, which is used to limit the second pole. Along the height direction of the battery cell 3, at least part of the projection of the second limiting portion 24 falls into the second hollow portion 22. The second limiting portion 24 can limit the second pole or the battery cell 3 to reduce the possibility of movement of the battery cell 3.

[0048] In some specific embodiments, the second limiting portion 24 is a block extending from the second bracket 2 , and a plurality of second limiting portions 24 are distributed around the pole, which can limit the freedom of the battery cell 3 and reduce the possibility of movement of the battery cell 3 .

[0049] In some specific embodiments, the battery cell 3 is a cylindrical battery cell 3. A plurality of cylindrical battery cells 3 are arranged in an array on the mounting seat, and there are gaps between adjacent cylindrical battery cells 3, so that the arrangement of the plurality of cylindrical battery cells 3 on the mounting seat is relatively regular, which can improve the space utilization of the first bracket 1 and the second bracket 2. There are gaps between adjacent cylindrical battery cells 3, which is conducive to improving the heat dissipation efficiency of the cylindrical battery cells 3.

[0050] The battery pack provided in the embodiment of the present disclosure includes the battery module provided in the embodiment of the present disclosure. Since the battery pack provided in the embodiment of the present disclosure has the same advantages as the battery module provided in the embodiment of the present disclosure, they will not be described in detail here.

[0051] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this disclosure can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solutions disclosed in this disclosure can be achieved, and this document does not limit this.

[0052] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0053] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A battery module, characterized in that: include: A first bracket (1), a plurality of battery cells (3) and a first busbar (16); A plurality of first mounting positions (11) are provided on one side of the first bracket (1) corresponding to the battery cell (3), and one end of the battery cell (3) is mounted on a corresponding first mounting position (11); The first bracket (1) is provided with a plurality of first hollow portions (12), and the first hollow portions (12) penetrate the first mounting position (11), so that the first pole of the battery cell (3) can be exposed from the first hollow portions (12); The first busbar (16) is arranged on a side of the first bracket (1) facing away from the battery core (3), and the first pole and the first busbar (16) are welded to form a first welding portion; A plurality of first grooves (13) are provided on a side of the first bracket (1) facing away from the battery core (3); the first busbar (16) covers at least a portion of the first grooves (13); and the first grooves (13) are located between two adjacent first welding portions.

2. The battery module according to claim 1, characterized in that: The first bracket (1) is provided with a first mounting groove (15), the first busbar (16) is arranged in the first mounting groove (15), the first groove (13) comprises a first bottom wall (131), and a first avoidance gap is provided between the first bottom wall (131) and the first busbar (16).

3. The battery module according to claim 1, characterized in that: The first bracket (1) is provided with a first limiting portion (14), and the first limiting portion (14) is used to limit the position of the first pole; Along the height direction of the battery core (3), at least a portion of the projection of the first limiting portion (14) falls into the first hollow portion (12).

4. The battery module according to claim 3, characterized in that: The first limiting portion (14) is a block-shaped body extending from the first bracket (1), and a plurality of the first limiting portions (14) are distributed around the pole.

5. The battery module according to any one of claims 1 to 4, characterized in that: It also comprises a second bracket (2), the first bracket (1) and the second bracket (2) being coupled and connected, and a receiving cavity for receiving the battery cell (3) is defined between the second bracket (2) and the first bracket (1); Wherein, a plurality of second mounting positions are provided on one side of the second bracket (2) corresponding to the battery cell (3), and one end of the battery cell (3) away from the first bracket (1) is mounted at the corresponding second mounting position.

6. The battery module according to claim 5, characterized in that: The second bracket (2) is provided with a plurality of second hollow portions (22), and the second hollow portions (22) penetrate the second mounting position so that the second pole of the battery cell (3) can be exposed from the second hollow portions (22); A second busbar (26) is arranged on a side of the second bracket (2) facing away from the battery core (3), and the second pole and the second busbar (26) are welded to form a second welding portion; A plurality of second grooves (23) are provided on a side of the second bracket (2) facing away from the battery core (3); the second busbar (26) covers at least a portion of the second grooves (23); and the second grooves (23) are located between two adjacent second welding portions.

7. The battery module according to claim 6, characterized in that: The second bracket (2) is provided with a second mounting groove (25), the second busbar (26) is arranged in the second mounting groove (25), the second groove (23) comprises a second bottom wall (231), and a second avoidance gap is provided between the second bottom wall (231) and the second busbar (26); And / or, the second bracket (2) is provided with a second limiting portion (24), the second limiting portion (24) being used to limit the second pole, and along the height direction of the battery cell (3), at least a portion of the projection of the second limiting portion (24) falls into the second hollow portion (22).

8. The battery module according to claim 7, characterized in that: The second limiting portion (24) is a block-shaped body extending from the second bracket (2), and a plurality of the second limiting portions (24) are distributed around the pole.

9. The battery module according to claim 1, characterized in that: The battery core (3) is a cylindrical battery core (3).

10. A battery pack, characterized in that: A battery module comprising any one of claims 1 to 9.

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