End support frame of battery module and battery module

Abstract

The invention provides an end supporting frame of a battery module and the battery module, and relates to the technical field of batteries, the end supporting frame is used for being arranged at the ends of a plurality of single batteries of the battery module, the end supporting frame comprises an end plate, a plurality of pairs of tab ports are arranged on the end plate, each pair of tab ports comprises two tab ports, and the tab ports are arranged on the end plate. Each tab opening is used for penetrating through a tab of at least one single battery, a plurality of grooves are formed in one surface, far away from the single batteries, of the end plate, one groove is formed between each pair of tab openings, each groove can be covered by a bent tab, and the grooves are used for avoiding welding spots of the tabs, so that ablation to the end part support frame during laser welding is avoided, and the welding quality of the end part support frame is improved. Compared with the prior art, the battery module provided by the invention has the advantages that the welding reliability of the tabs is improved, the welding between the tabs in the absence of the base row is realized, the traditional welding structure with the base row is cancelled, the number of parts is reduced, the structural complexity of the battery module is reduced, the grouping rate of the battery module is improved, and the competitiveness of the product is improved.

Description

Technical Field

[0001] The present invention belongs to the field of batteries, and more specifically, relates to an end support frame of a battery module and a battery module. Background Art

[0002] Lithium batteries are the power source or storage medium for new energy vehicles, energy storage power stations, new energy applications, etc. Lithium battery modules are widely used in various fields of new energy. Robots, electric aircraft and other products have higher requirements for battery assembly rate. In order to improve the assembly rate of products, it is necessary to design products with lightweight, reduce unnecessary parts, and ensure the assembly rate and reliability of products.

[0003] When the pole tabs of the existing battery modules are connected, the traditional welding structure with a base row is mostly used on the end support frame of the battery module. Although the connection between the pole tabs can be achieved, the setting of the base row increases the number of parts of the battery module and improves the structural complexity of the battery module, thereby reducing the grouping rate of the battery module. Summary of the invention

[0004] The purpose of the present invention is to provide an end support frame and a battery module for a battery module in view of the deficiencies in the existing technology, so as to solve the problem that the end support frames of the existing battery modules proposed in the above background technology mostly adopt a traditional welding structure with a base row. Although the connection between the pole ears can be achieved, the setting of the base row increases the number of parts of the battery module and increases the structural complexity of the battery module, thereby reducing the grouping rate of the battery module.

[0005] In order to achieve the above-mentioned purpose, the present invention provides an end support frame of a battery module, wherein the end support frame is used to be arranged at the ends of multiple single cells of the battery module, and the end support frame includes an end plate, and multiple pairs of pole lug openings are arranged on the end plate, each pair of the pole lug openings is two, and each of the pole lug openings is used to pass the pole lug of at least one single cell. A plurality of grooves are arranged on a side of the end plate away from the multiple single cells, and a groove is arranged between each pair of the pole lug openings, and each of the grooves can be covered by the bent pole lug, and the grooves are used to avoid the welding points of the pole lugs.

[0006] Preferably, a plurality of reinforcing ribs are arranged on the inner side of the groove, and the reinforcing ribs are concave in shape, with the notches of the concave reinforcing ribs facing the outer side of the groove.

[0007] Preferably, the end plate is an injection-molded insulating plate.

[0008] Preferably, the tab opening and the groove are both in the shape of elongated strips.

[0009] Preferably, a plurality of positioning support holes are arranged at the upper and lower ends of the end plate.

[0010] A battery module, comprising:

[0011] Two end support frames of a battery module according to any one of claims 1 to 5;

[0012] A plurality of single cells are stacked together, and the two end support frames are respectively arranged at the two ends of the single cells.

[0013] Preferably, the battery module comprises a plurality of buffer bodies, and a buffer body is arranged between two adjacent single batteries.

[0014] Preferably, the battery module comprises a plurality of support bodies, and a support body is arranged between the tabs of two connected single batteries.

[0015] Preferably, the battery module comprises two insulating plates, and the plurality of stacked single cells are arranged between the two insulating plates.

[0016] Preferably, the battery module comprises an insulating tape, and the insulating tape is wrapped around the outer sides of the two insulating plates and around the plurality of single batteries.

[0017] The present invention provides an end support frame and a battery module, which have the beneficial effects of: a plurality of grooves are arranged on one side of an end plate of the end support frame away from a plurality of single cells, a groove is arranged between each pair of pole ear openings, each groove can be covered by a bent pole ear, and the groove is used to avoid welding points of the pole ears. When the pole ears on both sides of the groove are bent and folded onto the groove and welded, the pole ears are suspended due to the grooves, thereby avoiding ablation of the end support frame during laser welding, improving the reliability of pole ear welding, realizing welding between pole ears when there is no base row, canceling the traditional welding structure with a base row, reducing the number of components and the structural complexity of the battery module, improving the grouping rate of the battery module, and improving the competitiveness of the product.

[0018] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0020] Figure 1 A schematic diagram of the front view of an end support frame of a battery module according to an embodiment of the present invention is shown;

[0021] Figure 2Shows Figure 1 Schematic diagram of the AA surface structure;

[0022] Figure 3 A schematic diagram of a top view of an end support frame of a battery module according to an embodiment of the present invention is shown;

[0023] Figure 4 A schematic diagram of the three-dimensional structure of a battery module according to an embodiment of the present invention is shown;

[0024] Figure 5 A schematic diagram of the main structure of a battery module according to an embodiment of the present invention is shown;

[0025] Figure 6 A schematic diagram of the top view and cross-sectional structure of a battery module according to an embodiment of the present invention is shown.

[0026] Description of reference numerals:

[0027] 1. Single cell; 2. End plate; 3. Pole ear opening; 4. Pole ear; 5. Groove; 6. Reinforcement rib; 7. Support hole; 8. Buffer body; 9. Support body; 10. Insulation plate; 11. Insulation tape; DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0029] like Figure 1-3 As shown, the present invention provides an end support frame of a battery module, the end support frame is used to be arranged at the ends of multiple single cells 1 of the battery module, the end support frame includes an end plate 2, a plurality of pairs of pole ear openings 3 are arranged on the end plate 2, each pair of the pole ear openings 3 is two, each of the pole ear openings 3 is used to pass the pole ear 4 of at least one single cell 1, a plurality of grooves 5 are arranged on a side of the end plate 2 away from the multiple single cells 1, a groove 5 is arranged between each pair of the pole ear openings 3, each of the grooves 5 can be covered by the bent pole ear 4, and the grooves 5 are used to avoid the welding points of the pole ears 4.

[0030] Specifically, in order to solve the problem that the conventional welding structure with base row is mostly adopted on the end support frame of the existing battery module, although the connection between the pole ears can be realized, the setting of the base row increases the number of parts of the battery module and increases the structural complexity of the battery module, and reduces the grouping rate of the battery module, the present invention provides an end support frame of the battery module, wherein the end plate 2 of the end support frame is arranged with a plurality of grooves 5 on a side away from the plurality of single batteries 1, a groove 5 is arranged between each pair of the pole ear openings 3, each groove 5 can be covered by the bent pole ear 4, and the groove 5 is used to avoid the welding point of the pole ear 4. When the pole ears 4 on both sides of the groove 5 are bent and added to the groove 5 and welded, the pole ears 4 are suspended due to the groove 5, so that the ablation of the end support frame during laser welding is avoided, the reliability of the welding of the pole ears 4 is improved, the welding between the pole ears 4 and the pole ears 4 is realized when there is no base row, the conventional welding structure with base row is cancelled, the number of parts is reduced and the structural complexity of the battery module is reduced, the grouping rate of the battery module is improved, and the competitiveness of the product is improved.

[0031] Preferably, a plurality of reinforcing ribs 6 are arranged on the inner side of the groove 5 , and the reinforcing ribs 6 are concave in shape, with the notches of the concave reinforcing ribs 6 facing the outer side of the groove 5 .

[0032] Specifically, a reinforcing rib 6 of a certain strength is added inside the groove 5 according to the strength requirement. The multiple reinforcing ribs 6 can also effectively support the tab 4, so that the welding tooling can be effectively crimped during welding, ensuring the strength during welding crimping and improving the reliability of the tab 4 welding.

[0033] Preferably, the end plate 2 is an injection-molded insulating plate.

[0034] Specifically, the end plate 2 is injection molded with PP or similar insulating materials to ensure the strength and insulation performance of the battery module.

[0035] Preferably, the tab opening 3 and the groove 5 are both in the shape of elongated strips.

[0036] Specifically, the long strip-shaped pole ear opening 3 is suitable for the pole ear 4 to pass through, and the long strip-shaped groove 5 is suitable for the pole ear 4 to be suspended when covered, and the groove 5 is used to avoid the welding point of the pole ear 4.

[0037] Preferably, a plurality of positioning support holes 7 are arranged at the upper and lower ends of the end plate 2 .

[0038] Specifically, the multiple positioning support holes 7 can facilitate the positioning of the positioning tool, enhance the strength of the end plate 2 when the tab 4 is welded, improve the reliability of welding, and increase the grouping rate of the battery module.

[0039] like Figure 4-6 As shown, a battery module comprises:

[0040] Two end support frames of a battery module according to any one of claims 1 to 5;

[0041] A plurality of single cells 1 are stacked together, and the two end support frames are respectively arranged at two ends of the single cells 1.

[0042] Specifically, a plurality of single cells 1 can be connected in series by disposing the two end support frames.

[0043] Preferably, the battery module includes a plurality of buffer bodies 8 , and a buffer body 8 is disposed between two adjacent single batteries 1 .

[0044] Specifically, the buffer body 8 can be a buffer foam. The buffer foam is made of flame-retardant material, which can effectively ensure reasonable pressure on the single battery 1 throughout its life cycle and ensure the service life of the single battery 1. The flame-retardant property can effectively prevent heat spread of the single battery 1 and ensure the safety of the battery module.

[0045] Preferably, the battery module comprises a plurality of support bodies 9 , and one support body 9 is arranged between the tabs 4 of two connected single batteries 1 .

[0046] Specifically, the support body 9 is a supporting foam, which ensures effective support for the tab 4 after the battery module is assembled, and can also ensure that the position of the tab 4 is fixed during welding.

[0047] Preferably, the battery module includes two insulating plates 10 , and the plurality of stacked single batteries 1 are arranged between the two insulating plates 10 .

[0048] Specifically, the two insulating plates 10 can ensure the strength and insulation performance of the plurality of single batteries 1 when they are installed.

[0049] Preferably, the battery module comprises an insulating tape 11 , and the insulating tape 11 is wrapped around the outer sides of the two insulating plates 10 and around the plurality of single batteries 1 .

[0050] Specifically, by wrapping and tightening the insulating tape 11 with high strength, the battery module can be made into a solid whole.

[0051] In summary, when the end support frame provided by the present invention is implemented on the battery module, the pole lug 4 passes through the corresponding pole lug opening 3 and is bent to cover the corresponding groove 5. During welding, the pole lug 4 is suspended due to the groove 5, which avoids the ablation of the end support frame during laser welding, improves the reliability of the welding of the pole lug 4, realizes the welding between the pole lugs 4 and the pole lugs 4 when there is no base row, eliminates the traditional welding structure with a base row, reduces the number of components and the structural complexity of the battery module, improves the grouping rate of the battery module, and improves the competitiveness of the product.

[0052] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. An end support frame of a battery module, the end support frame is used to be arranged at the ends of multiple single batteries of the battery module, characterized in that: The end support frame includes an end plate, on which a plurality of pairs of pole lug openings are arranged, each pair of the pole lug openings has two pole lug openings, each of the pole lug openings is used to pass through a pole lug of at least one single battery, a plurality of grooves are arranged on a side of the end plate away from the plurality of single batteries, a groove is arranged between each pair of the pole lug openings, each of the grooves can be covered by the bent pole lug, and the grooves are used to avoid the welding points of the pole lugs.

2. The end support frame of a battery module according to claim 1, characterized in that: A plurality of reinforcing ribs are arranged on the inner side of the groove, and the reinforcing ribs are concave in shape, with the notches of the concave reinforcing ribs facing the outer side of the groove.

3. The end support frame of a battery module according to claim 1, characterized in that: The end plate is an injection-molded insulating plate.

4. The end support frame of a battery module according to claim 1, characterized in that: The pole ear opening and the groove are both in the shape of long strips.

5. A battery module, characterized in that: include: Two end support frames of a battery module according to any one of claims 1 to 4; A plurality of single cells are stacked together, and the two end support frames are respectively arranged at the two ends of the single cells.

6. A battery module according to claim 5, characterized in that: The battery module includes a plurality of buffer bodies, and a buffer body is arranged between two adjacent single batteries.

7. A battery module according to claim 5, characterized in that: The battery module comprises a plurality of support bodies, and a support body is arranged between the pole ears of two connected single batteries.

8. A battery module according to claim 5, characterized in that: The battery module includes two insulating plates, and a plurality of stacked single cells are arranged between the two insulating plates.

9. A battery module according to claim 8, characterized in that: The battery module includes an insulating tape, which is wrapped around the outer sides of the two insulating plates and around the plurality of single batteries.

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