Battery connecting piece and battery module

Abstract

The utility model relates to the technical field of batteries, in particular to a battery connecting piece and a battery module. The battery connecting piece comprises a first body part, at least one first concave part is formed on the first body part, so that a height difference is formed between each first concave part and the first body part, and the first concave parts are used for being connected with a battery cap. According to the battery connecting piece and the battery module, the balance of the gas pressure in the cylindrical battery can be ensured, so that the safety performance of the battery module is ensured.

Description

Technical Field

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

[0002] As the scale of energy storage continues to expand, the demand for energy storage markets at home and abroad has further increased, and the new generation of large cylindrical, high-capacity battery modules are also facing major tests of safety performance.

[0003] Large cylindrical batteries are composed of positive / negative electrodes, electrolyte, outer casing, cap, gasket, safety valve, etc. When the battery is over-voltage or overheated under certain circumstances, the battery's safety valve will automatically open and release some gas to ensure the balance of gas pressure inside the battery and prevent explosion caused by excessive internal pressure of the battery.

[0004] In the structure of the battery module, the connector connects each cylindrical battery in series and parallel, so as to efficiently and stably transmit the battery module current. Usually the connector is welded on the two end caps of the battery, and inevitably one end of the connector will cover the safety valve of the battery, which brings great safety hazards to the automatic opening of the safety valve of the large cylindrical battery. Utility Model Content

[0005] The technical problem to be solved by the embodiments of the utility model is to provide a battery connector and a battery module to solve the problem in the prior art that the connector will cover the safety valve of the battery, which brings great safety hazards to the automatic opening of the safety valve of the large cylindrical battery.

[0006] The utility model discloses a battery connector, comprising: a first main body, on which at least one first recessed portion is formed, so that a height difference is formed between each first recessed portion and the first main body, and the first recessed portion is used to connect with a battery cap.

[0007] Optionally, a first guide groove is also formed on each of the first recessed portions.

[0008] Optionally, the first guide groove is arranged concentrically with the first recessed portion.

[0009] Optionally, a first positioning hole is further formed on the first main body portion.

[0010] Optionally, the first main body portion is a straight line structure, and a plurality of the first recessed portions are linearly arranged on the first main body portion.

[0011] Optionally, the first body portion is in an I-shaped structure, and the plurality of first recessed portions are distributed on two opposite sides of the first body portion.

[0012] Optionally, the height difference between each of the first recessed portions and the first main body portion is the same.

[0013] This embodiment also discloses a battery module, comprising a plurality of cylindrical batteries arranged in an array and the above-mentioned battery connector, wherein the battery connector is used to connect at least two of the cylindrical batteries, and the first recessed portion of the battery connector is provided on the battery cap of the cylindrical battery so as to form a first exhaust space between the first main body portion of the battery connector and the safety valve of the cylindrical battery.

[0014] Optionally, the battery module also includes two first connecting members, the first connecting members include a second main body portion, a bending portion and a third main body portion connected in sequence, the second main body portion is located above the third main body portion, and a second recessed portion is formed on the third main body portion so that a height difference is formed between the second recessed portion and the third main body portion, and the two first connecting members are used to connect the cylindrical batteries and the BMS protection plate at opposite ends of the battery module, the third main body portion is arranged on the battery cap of the cylindrical battery, a second exhaust space is formed between the third main body portion and the safety valve of the cylindrical battery, and the second main body portion is arranged on the BMS protection plate.

[0015] Optionally, a second positioning hole and a connecting hole are formed on the second main body portion; and a second guide groove is formed on the second recessed portion.

[0016] Compared with the prior art, the battery connector and battery module provided by the embodiment of the utility model have the following beneficial effects:

[0017] At least one first recessed portion is formed on the first main body of the battery connector so that a height difference is formed between each of the first recessed portion and the first main body. When the battery connector is used to connect cylindrical batteries, the first recessed portions are respectively arranged on the battery cap. Because a height difference is formed between each of the first recessed portion and the first main body, a first exhaust space is formed between the first main body and the safety valve of the cylindrical battery so that the safety valve can be opened at any time according to the actual situation of the cylindrical battery during use. The safety valve releases the internal gas through the first exhaust space to ensure the balance of the internal gas pressure of the cylindrical battery, thereby ensuring the safety performance of the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The technical solution of the utility model will be further described in detail below with reference to the accompanying drawings and embodiments, in which:

[0019] Figure 1 It is a structural schematic diagram of a battery connector provided by an embodiment of the utility model;

[0020] Figure 2It is a schematic diagram of the arrangement structure of the battery connector provided by the embodiment of the utility model on the cylindrical battery;

[0021] Figure 3 It is a front structural schematic diagram of a battery connector provided by another embodiment of the utility model;

[0022] Figure 4 It is a schematic diagram of the reverse structure of a battery connector provided by another embodiment of the utility model;

[0023] Figure 5 It is a front structural schematic diagram of a battery connector provided by another embodiment of the utility model;

[0024] Figure 6 It is a schematic diagram of the reverse structure of a battery connector provided by another embodiment of the utility model;

[0025] Figure 7 It is a structural schematic diagram of a first connecting member provided in an embodiment of the utility model;

[0026] Figure 8 It is a schematic diagram of the arrangement structure of the battery connector and the first connector provided by the embodiment of the utility model on the cylindrical battery;

[0027] Fig. 9 It is a schematic diagram of the arrangement structure of the battery module provided by the embodiment of the utility model;

[0028] Fig.10 It is a schematic diagram of the arrangement structure of a battery connector and a first connector on a cylindrical battery provided by another embodiment of the utility model;

[0029] Fig.11 It is a schematic diagram of the arrangement structure of a battery module provided in another embodiment of the utility model.

[0030] The reference numerals in the figures are:

[0031] 10. Battery connector; 110. First main body; 101. First recessed portion; 1011. First guide groove; 102. First positioning hole; 20. Cylindrical battery; 210. Battery cap; 220. Safety valve; 201. First exhaust space; 30. First connector; 310. Second main body; 320. Bend portion; 330. Third main body; 301. Second recessed portion; 302. Second positioning hole; 303. Connecting hole; 3011. Second guide groove; 40. Bracket; 410. Positioning column. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Now, in conjunction with the accompanying drawings, a preferred embodiment of the present utility model is described in detail.

[0033] The present utility model embodiment provides a battery connector 10, such as Figure 1 , Figure 2 and Figure 8 As shown, the battery connector 10 includes: a first body portion 110 , on which is formed at least one first recessed portion 101 , so that a height difference is formed between each first recessed portion 101 and the first body portion 110 , and the first recessed portion 101 is used to connect with the battery cap 210 .

[0034] The battery connector 10 of this embodiment refers to Figure 2 At least one first recessed portion 101 is formed on the first main body 110 of the battery connector 10 so that a height difference is formed between each first recessed portion 101 and the first main body 110. When the battery connector 10 is used to connect the cylindrical battery 20, the first recessed portions 101 are respectively arranged on the battery cap 210. Because a height difference is formed between each first recessed portion 101 and the first main body 110, a first exhaust space 201 is formed between the first main body 110 and the safety valve 220 of the cylindrical battery 20 so that the safety valve 220 can be opened at any time according to the actual situation of the cylindrical battery 20 during use of the cylindrical battery 20. The safety valve 220 releases the internal gas through the first exhaust space 201 to ensure the balance of the internal gas pressure of the cylindrical battery 20, thereby ensuring the safety performance of the battery module.

[0035] The number of the above-mentioned first recessed portions 101 is not specifically limited, and can be adjusted according to the actual needs of the battery module. The number of the first recessed portions 101 matches the number of cylindrical batteries 20 that need to be connected. For example, when two cylindrical batteries 20 need to be connected, the number of the first recessed portions 101 is set to two.

[0036] The height difference formed between the above-mentioned first recessed portion 101 and the first main body portion 110 is not limited. The height difference between each first recessed portion 101 and the first main body portion 110 can be all the same, all different, or partially the same, and can be adjusted according to the actual setting position and height of the cylindrical battery 20, and is not specifically limited here.

[0037] As a preferred solution of this embodiment, refer to Figure 1 A first guide groove 1011 is also formed on each first recessed portion 101 .

[0038] Among them, the first guide groove 1011 is used to guide the current of the cylindrical battery 20, and at the same time it can also avoid the insert components of the cylindrical battery 20, so that the CCD of the laser spot welding equipment can capture the position of the battery cap 210 of the cylindrical battery 20, and provide a reference for the correction of the center position of the first recessed portion 101, so that the first recessed portion 101 can be accurately set on the battery cap 210, thereby improving the setting efficiency of the battery connector 10 on the cylindrical battery 20.

[0039] As a preferred solution of this embodiment, refer to Figure 1 The first guide groove 1011 is concentrically arranged with the first recessed portion 101 .

[0040] Among them, the size of the first recessed portion 101 matches the size of the battery cap 210, so that the edge of the first recessed portion 101 coincides with the edge of the battery cap 210, and the first guide groove 1011 is concentrically arranged with the first recessed portion 101. By locating the first guide groove 1011 in the central part of the battery cap 210, the matching and stability of the connection between the first recessed portion 101 and the battery cap 210 can be ensured, and laser spot welding along the first guide groove 1011 can ensure the stable connection between the first recessed portion 101 and the battery cap 210.

[0041] As a preferred solution of this embodiment, a first positioning hole 102 is further formed on the first body portion 110 .

[0042] Among them, refer to Figure 1 and Fig. 9 The function of the first positioning hole 102 is to match the positioning column 410 set on the bracket 40 on the battery module, so as to improve the precise setting and connection stability of the battery connector 10 on the battery module, and the first positioning hole 102 also provides a welding position to connect the battery connector 10 and the positioning column 410 by laser spot welding.

[0043] The number of the first positioning holes 102 matches the number of the positioning posts 410 on the battery module, and is not specifically limited here. Figure 1 An example in which two first positioning holes 102 are provided is given.

[0044] As a preferred solution of this embodiment, refer to Figure 3 and Figure 4 The first main body portion 110 is a linear structure, and the plurality of first recessed portions 101 are linearly arranged on the first main body portion 110 .

[0045] This embodiment provides a structural form of the first body portion 110, please refer to Figure 3 and Figure 4In this embodiment, when the first body portion 110 is in a straight line structure, an example is given in which two first recessed portions 101 are provided. The two first recessed portions 101 are arranged linearly. Figure 3 and Figure 4 An example is also given in which when the first body portion 110 is in a straight structure, four first recessed portions 101 are provided. The above four first recessed portions 101 are arranged linearly, and the number of the first recessed portions 101 provided is not specifically limited here.

[0046] As a preferred solution of this embodiment, the first body portion 110 is in an I-shaped structure, and the plurality of first recessed portions 101 are distributed on two opposite sides of the first body portion 110 .

[0047] This embodiment provides a structural form of the first body portion 110, please refer to Figure 5 and Figure 6 In an example where the first body portion 110 is in an I-shaped structure and four first recessed portions 101 are provided, there are two first recessed portions 101 on opposite sides of the first body portion 110 .

[0048] Please refer to Fig.10 , a schematic diagram of the arrangement structure of the battery connectors 10 with different structures described above on multiple cylindrical batteries 20 is given. The arrangement positions of the battery connectors 10 with different structures described above on the battery module can be adjusted according to actual conditions, and are not specifically limited here.

[0049] As a preferred solution of this embodiment, the height difference between each first recessed portion 101 and the first body portion 110 is the same.

[0050] In this embodiment, an example is given in which the height difference between each first recessed portion 101 and the first main body portion 110 is the same, please refer to Figure 8 The size and arrangement of the cylindrical batteries 20 in the battery module are the same. Therefore, when using the battery connector 10 of this embodiment, there is no need to associate the matching features between the battery connector 10 and the cylindrical batteries 20 in advance. The battery connector 10 can be directly and quickly arranged on each cylindrical battery 20, thereby improving installation efficiency.

[0051] This embodiment also discloses a battery module, referring to Figure 8 , comprising a plurality of cylindrical batteries 20 arranged in an array and the above-mentioned battery connector 10, the battery connector 10 is used to connect at least two cylindrical batteries 20, and the first recessed portion 101 of the battery connector 10 is provided on the battery cap 210 of the cylindrical battery 20, so that a first exhaust space 201 is formed between the first body portion 110 of the battery connector 10 and the safety valve 220 of the cylindrical battery 20.

[0052] The battery module includes the same structure and benefits as the battery connector 10 in the above embodiment. The structure and benefits of the battery connector 10 have been described in detail in the above embodiment and will not be repeated here.

[0053] The battery connector 10 is used to connect at least two cylindrical batteries 20, so as to efficiently and stably transmit the battery module current.

[0054] As a preferred solution of this embodiment, refer to Figures 7 to 11 The battery module also includes two first connectors 30, the first connector 30 includes a second body portion 310, a bending portion 320 and a third body portion 330 connected in sequence, the second body portion 310 is located above the third body portion 330, and a second recessed portion 301 is formed on the third body portion 330 so that a height difference is formed between the second recessed portion 301 and the third body portion 330. The two first connectors 30 are used to connect the cylindrical batteries 20 and the BMS protection plate (not shown in the figure) at opposite ends of the battery module. The third body portion 330 is arranged on the battery cap 210 of the cylindrical battery 20, and a second exhaust space (not shown in the figure) is formed between the third body portion 330 and the safety valve 220 of the cylindrical battery 20, and the second body portion 310 is arranged on the BMS protection plate.

[0055] The battery module in this embodiment further includes a first connector 30, wherein the purpose of setting the first connector 30 is to connect the battery module and the BMS protection board. In actual use, the first connector 30 is respectively arranged on the cylindrical batteries 20 at opposite ends of the battery module. Specifically, the third body portion 330 is arranged on the battery cap 210 of the cylindrical battery 20, and the second body portion 310 is arranged on the BMS protection board. The setting of the bent portion 320 plays a role of transition connection, which is used to correct the height of the cylindrical battery 20 and the BMS protection board. There is a height difference between the second recessed portion 301 and the third main body portion 330, so that after the first connecting member 30 is arranged on the cylindrical battery 20, a second exhaust space 201 is formed between the third main body portion 330 and the safety valve 220 of the cylindrical battery 20, so that during the use of the cylindrical battery 20, the safety valve 220 can be opened at any time according to the actual situation of the cylindrical battery 20. The safety valve 220 releases the internal gas through the second exhaust space to ensure the balance of the internal gas pressure of the cylindrical battery 20, thereby ensuring the safety performance of the battery module.

[0056] The arrangement direction of the second main body portion 310 of the first connector 10 can be adjusted according to the arrangement of the BMS protection board of the battery module. Figure 8 and Fig. 9 In the example, the second body portion 310 is arranged in parallel with the third body portion 330; please continue to refer to Fig.10 and Fig.11In the example of FIG. 3 , the second body portion 310 and the third body portion 330 are vertically arranged.

[0057] In this embodiment, under the joint action of the battery connector 10 and the first connector 30, the potential safety hazard during the use of the battery module is reduced.

[0058] As a preferred solution of this embodiment, refer to Figures 7 to 11 A second positioning hole 302 and a connecting hole 303 are formed on the second body portion 310 ; a second guide groove 3011 is formed on the second recessed portion 301 .

[0059] Among them, the function of the above-mentioned second positioning hole 302 is to match with the corresponding positioning column 410 on the bracket 40 on the battery module, so as to improve the precise setting and connection stability of the first connecting member 30 on the battery module, and the second positioning hole 302 also provides a welding position to connect the first connecting member 30 and the positioning column 410 by laser spot welding.

[0060] The above-mentioned connecting hole 303 is used to lock the BMS protection board of the battery module and transmit the stable current of the cylindrical battery 20 to the BMS protection board; the above-mentioned second guide groove 3011 is used to guide the current of the cylindrical battery 20, and at the same time it can also avoid the insert components of the cylindrical battery 20, so that the CCD of the laser spot welding equipment can capture the position of the battery cap 210 of the cylindrical battery 20, and provide a reference for the correction of the center position of the second recessed portion 301, so that the second recessed portion 301 can be accurately set on the battery cap 210, thereby improving the setting efficiency of the first connecting member 10 on the cylindrical battery 20.

[0061] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present utility model rather than to limit it. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features therein can be replaced by equivalents; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present utility model.

Claims

1. A battery connector, characterized in that: include: A first main body portion (110), wherein at least one first recessed portion (101) is formed on the first main body portion (110), so that a height difference is formed between each first recessed portion (101) and the first main body portion (110), and the first recessed portion (101) is used to connect with a battery cap (210).

2. The battery connector according to claim 1, characterized in that: A first guide groove (1011) is also formed on each of the first recessed portions (101).

3. The battery connector according to claim 2, characterized in that: The first guide groove (1011) is arranged concentrically with the first recessed portion (101).

4. The battery connector according to claim 1, characterized in that: A first positioning hole (102) is also formed on the first main body portion (110).

5. The battery connector according to claim 1, characterized in that: The first main body portion (110) is in a straight line structure, and a plurality of the first recessed portions (101) are arranged linearly on the first main body portion (110).

6. The battery connector according to claim 1, characterized in that: The first main body portion (110) is in an I-shaped structure, and a plurality of the first recessed portions (101) are distributed on two opposite sides of the first main body portion (110).

7. The battery connector according to any one of claims 1 to 6, characterized in that: The height difference between each of the first recessed portions (101) and the first main body portion (110) is the same.

8. A battery module, characterized in that: The invention comprises a plurality of cylindrical batteries (20) arranged in an array and a battery connector (10) as claimed in any one of claims 1 to 7, wherein the battery connector (10) is used to connect at least two of the cylindrical batteries (20), and a first recessed portion (101) of the battery connector (10) is provided on a battery cap (210) of the cylindrical battery (20) so as to form a first exhaust space (201) between the first body portion (110) of the battery connector (10) and a safety valve (220) of the cylindrical battery (20).

9. The battery module according to claim 8, characterized in that: The battery module also includes: Two first connecting members (30), wherein the first connecting members (30) include a second main body portion (310), a bending portion (320) and a third main body portion (330) connected in sequence, wherein the second main body portion (310) is located above the third main body portion (330), and a second recessed portion (301) is formed on the third main body portion (330) so that a height difference is formed between the second recessed portion (301) and the third main body portion (330), and the two first connecting members (30) are used to connect the cylindrical battery (20) and the BMS protection board at opposite ends of the battery module, and the third main body portion (330) is arranged on the battery cap (210) of the cylindrical battery (20), and a second exhaust space is formed between the third main body portion (330) and the safety valve of the cylindrical battery (20), and the second main body portion (310) is arranged on the BMS protection board.

10. The battery module according to claim 9, characterized in that: A second positioning hole (302) and a connecting hole (303) are formed on the second main body portion (310); and a second guide groove (3011) is formed on the second recessed portion (301).

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