Battery cover plate assembly and battery

Abstract

The utility model provides a battery cover plate assembly and a battery, and relates to the technical field of batteries. The pole is arranged on the cover plate body in a penetrating manner; the middle section of the connecting piece is connected to the pole, the two end sections of the connecting piece extend in the directions away from each other respectively, the two end sections are arranged towards the two ends of the cover plate body respectively, and the two end sections are used for being connected with the lead-out tabs of the two battery cell bodies respectively, so that the lead-out tabs of the two battery cell bodies are arranged in a staggered mode; according to the utility model, the two lead-out tabs can be prevented from interfering with each other when the lead-out tabs of the two battery cell bodies are respectively connected to the two end sections, the cutting of the lead-out tabs can be reduced as much as possible, the generation of dust and chippings is reduced as much as possible in production, and the production efficiency of products is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and more specifically, relates to a battery cover assembly and a battery. Background Art

[0002] Batteries are the power source or storage medium for new energy vehicles, energy storage power stations and new energy applications, and their applications are becoming more and more widespread.

[0003] Currently, if Figure 1 As shown, both end sections of the connecting piece 1 of the existing square battery are designed to extend in the same direction. When set on the cover body, they are all facing the same end of the cover body. This butterfly-shaped connecting piece is more suitable for the structure of the battery cell of the wound battery with only half of the pole ear. However, for the battery cell of the laminated battery, when the lead-out pole ears 5 of the two battery cell bodies 2 are respectively connected to the two end sections, the lead-out pole ears of the two battery cell bodies are arranged opposite to each other. If the lead-out pole ears of the two battery cell bodies are too long, they are easy to interfere with each other. If the pole ears are cut, dust and debris will be generated, causing pollution to the environment. Utility Model Content

[0004] The purpose of the utility model is to provide a battery cover assembly and a battery in view of the deficiencies in the existing technology, so as to solve the problem that the two end sections of the connecting piece of the existing square battery proposed in the above background technology are designed to extend in the same direction, and when they are set on the cover body, they are all facing the same end of the cover body, and the lead-out tabs of the two battery cell bodies can only be set directly opposite each other. If the lead-out tabs of the two battery cell bodies are too long, they are easy to interfere with each other. If the tabs are cut, dust and debris will be generated, causing pollution to the environment.

[0005] In order to achieve the above object, the utility model provides a battery cover assembly, which includes:

[0006] Cover plate body;

[0007] A pole, the pole being passed through the cover body;

[0008] A connecting piece, wherein the middle section of the connecting piece is connected to the pole, and the two end sections of the connecting piece extend in directions away from each other, and the two end sections are respectively arranged toward the two ends of the cover body, and the two end sections are respectively used to connect with the lead-out tabs of the two battery cell bodies, so that the lead-out tabs of the two battery cell bodies are staggered with each other.

[0009] Preferably, the two end sections are arranged on both sides of the middle section, and the two end sections are respectively arranged close to both sides of the cover plate body.

[0010] Preferably, the end section extends to both sides of the middle section, and both sides of the end section are respectively arranged close to both sides of the cover plate body.

[0011] Preferably, the connecting piece is connected to the pole by welding.

[0012] Preferably, the welding areas of the connecting piece and the pole are both provided with frosted surfaces.

[0013] Preferably, the lead-out tab is connected to the end section by welding.

[0014] Preferably, the number of the poles and the number of the connecting pieces are both two, the two poles are respectively a positive pole and a negative pole, and the two connecting pieces are respectively a positive electrode soft connecting piece and a negative electrode soft connecting piece.

[0015] Preferably, the positive electrode flexible connecting sheet is an aluminum flexible connecting sheet, and the negative electrode flexible connecting sheet is a copper flexible connecting sheet.

[0016] Preferably, the cover plate body is an aluminum cover plate or a stainless steel cover plate.

[0017] A battery comprising:

[0018] Battery cover assembly;

[0019] Two battery cell bodies, the two battery cell bodies are arranged on both sides of the cover plate body, the lead-out tabs of the two battery cell bodies are respectively connected to the two end sections, the battery cell body includes a plurality of battery chips, the plurality of battery chips are stacked and connected in sequence, and the battery cell tabs of the plurality of battery chips are stacked and connected in sequence.

[0020] The utility model provides a battery cover assembly and a battery, which have the following beneficial effects: the two end sections of the connecting piece of the cover assembly respectively extend in directions away from each other, the two end sections are respectively arranged toward the two ends of the cover body, and the two end sections are respectively connected to the lead-out tabs of the two battery cell bodies. Since the lead-out tabs of the two battery cell bodies can be staggered, it can be avoided that the two lead-out tabs interfere with each other when the lead-out tabs of the two battery cell bodies are respectively connected to the two end sections, the cutting of the lead-out tabs can be reduced as much as possible, the generation of dust and debris can be reduced as much as possible during production, and the production efficiency of the product is improved. At the same time, since the length of the lead-out tabs of the two battery cell bodies is not restricted, the effective area when connected with the connecting piece can be increased, the current flow capacity of the connecting piece is increased, and the reliability of the product is increased.

[0021] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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 the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.

[0023] Figure 1 A schematic diagram of the planar structure of a connection sheet and a battery cell body in the prior art is shown;

[0024] Figure 2 A schematic diagram of a planar structure of a battery according to an embodiment of the utility model is shown;

[0025] Figure 3 A schematic diagram of a three-dimensional structure of a battery according to an embodiment of the utility model is shown;

[0026] Figure 4 A schematic diagram of the planar structure of a battery cover assembly according to an embodiment of the utility model is shown;

[0027] Figure 5 A schematic diagram of the three-dimensional structure of a battery cover assembly according to an embodiment of the utility model is shown;

[0028] Figure 6 A schematic diagram of a connecting piece plane structure of a battery cover assembly according to an embodiment of the utility model is shown. Figure 1 ;

[0029] Figure 7 A schematic diagram of a three-dimensional structure of a connecting piece of a battery cover assembly according to an embodiment of the utility model is shown;

[0030] Figure 8 A schematic diagram of a connecting piece plane structure of a battery cover assembly according to an embodiment of the utility model is shown. Figure 2 .

[0031] Description of reference numerals:

[0032] 1. Connecting piece; 2. Cell body; 3. Cover body; 4. Pole; 5. Lead-out lug; DETAILED DESCRIPTION

[0033] 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 described 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.

[0034] like Figure 4 and Figure 5 As shown, the utility model provides a battery cover assembly, which includes:

[0035] Cover plate body 3;

[0036] A pole 4, which is passed through the cover body 3;

[0037] A connecting piece 1, the middle section of the connecting piece 1 is connected to the pole 4, the two end sections of the connecting piece 1 extend in directions away from each other, the two end sections are respectively arranged toward the two ends of the cover body 3, and the two end sections are respectively used to connect with the lead-out tabs 5 of the two battery cell bodies 2, so that the lead-out tabs 5 of the two battery cell bodies 2 are staggered with each other.

[0038] Specifically, in order to solve the problem that both end sections of the connecting piece of the existing square battery are designed to extend in the same direction, when they are set on the cover body, they are both facing the same end of the cover body, and the lead-out tabs of the two battery bodies can only be set directly opposite each other. If the lead-out tabs of the two battery bodies are too long, they are easy to interfere with each other. If the tabs are cut, dust and debris will be generated, causing environmental pollution. The utility model provides a battery cover assembly, the two end sections of the connecting piece 1 of the cover assembly extend in directions away from each other, and the two end sections are respectively set toward the two ends of the cover body 3, and the two end sections are respectively connected to the lead-out tabs of the two battery bodies 2. The lead-out tabs 5 are connected. Since the lead-out tabs 5 of the two battery cell bodies 2 can be staggered, it is possible to avoid interference between the two lead-out tabs 5 when the lead-out tabs 5 of the two battery cell bodies 2 are respectively connected to the two end sections, and the cutting of the lead-out tabs 5 can be reduced as much as possible. The generation of dust and debris is minimized during production, thereby improving the production efficiency of the product. At the same time, since the length of the lead-out tabs 5 of the two battery cell bodies 2 is not restricted, the effective area when connected to the connecting piece 1 can be increased, the current flow capacity of the connecting piece 1 is increased, and the reliability of the product is increased. Furthermore, the lead-out tabs 5 of the two battery cell bodies 2 can effectively realize electrical connection with the pole 4.

[0039] like Figure 6 and Figure 8 As shown, preferably, the two end sections are arranged on both sides of the middle section, and the two end sections are arranged close to both sides of the cover plate body 3 respectively.

[0040] Specifically, the two end sections are respectively arranged close to the two sides of the cover body 3 so that the two end sections are close to the lead-out tabs 5 of the two battery cell bodies 3, so as to facilitate the connection of the lead-out tabs 5 of the two battery cell bodies 2 with the two end sections respectively.

[0041] like Figure 7 As shown, preferably, the end section extends to both sides of the middle section, and both sides of the end section are respectively arranged close to both sides of the cover plate body 3.

[0042] Specifically, the end sections extend toward both sides of the middle section, which can increase the effective area when the lead-out tabs 5 of the cell body 2 are connected to the end sections, increase the current carrying capacity of the connecting piece 1, and improve the reliability of the product.

[0043] The connecting piece 1 can be designed with different flow areas according to the flow capacity, and the form can be but not limited to Figure 5 becomes Figure 6 state, which can improve the battery's charging and discharging conductivity.

[0044] Preferably, the connecting piece 1 is connected to the pole 4 by welding.

[0045] Specifically, the connecting piece 1 and the pole 4 can be welded by laser, which can ensure welding strength and current carrying capacity.

[0046] Preferably, the welding areas of the connecting piece 1 and the pole 4 are both provided with frosted surfaces.

[0047] Specifically, avoid laser high reflection failure during welding.

[0048] Preferably, the lead-out tab 5 is connected to the end section by welding.

[0049] Specifically, the lead-out tab 5 and the end segment may be welded by laser welding or ultrasonic welding to achieve effective electrical connection.

[0050] Preferably, the number of poles 4 and connecting pieces 1 are both two, the two poles 4 are respectively a positive pole and a negative pole, and the two connecting pieces 1 are respectively a positive electrode soft connecting piece and a negative electrode soft connecting piece.

[0051] Preferably, the positive electrode flexible connecting sheet is an aluminum flexible connecting sheet, and the negative electrode flexible connecting sheet is a copper flexible connecting sheet.

[0052] Specifically, the positive electrode flexible connecting piece can be formed by stamping an aluminum plate, and the negative electrode flexible connecting piece can be formed by stamping a copper plate, which is easy to mass produce and assemble.

[0053] Preferably, the cover plate body 3 is an aluminum cover plate or a stainless steel cover plate.

[0054] like Figure 2 and Figure 3 As shown, a battery comprises:

[0055] Battery cover assembly;

[0056] Two battery cell bodies 2 are arranged on both sides of the cover body 3, and the lead-out tabs 5 of the two battery cell bodies 2 are respectively connected to the two end sections. The battery cell body 2 includes multiple electric chips, and the multiple electric chips are stacked and connected in sequence, and the battery tabs of the multiple electric chips are stacked and connected in sequence.

[0057] In summary, when the battery cover assembly used in the battery of the utility model is in use, the two end sections of the connecting piece 1 extend in directions away from each other, and the two end sections are respectively arranged toward the two ends of the cover body 3. When the two battery cell bodies 2 are distributed on both sides of the cover body 3, the lead-out tabs 5 of the two battery cell bodies 2 can be staggered and respectively connected to the two end sections, thereby avoiding interference between the two lead-out tabs 5 during welding connection. At the same time, since the different lengths of the battery cell tabs can be arranged along the width direction of the cover when multiple electric chips are stacked, there is no restriction, thereby eliminating the need to cut the lead-out tabs 5. In production, the generation of dust and debris can be minimized, pollution caused by cutting can be avoided, and the cutting process can be reduced, which also improves the production efficiency of the product. It can also ensure that the same length is cut when producing the lead-out ears, thereby ensuring the continuity and consistency of production. At the same time, due to the design of the two end sections, the lead-out ears 5 of the two battery bodies 2 can be staggered, and the effective flow area of ​​the connecting piece 1 can be designed according to the designed flow capacity of the battery body 2. The design margin is larger, which can improve the charging and discharging capacity of the battery body 2. Increasing the charging and discharging capacity of the battery body 2 is also a development trend of the battery.

[0058] The various embodiments of the utility model have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A battery cover assembly, characterized in that: The cover assembly includes: Cover plate body; A pole, the pole being passed through the cover body; A connecting piece, the middle section of which is welded to the pole, the two end sections of which extend away from each other, the two end sections are respectively arranged toward the two ends of the cover body, and the two end sections are respectively used to connect with the lead-out tabs of the two battery cell bodies, so that the lead-out tabs of the two battery cell bodies are staggered with each other.

2. A battery cover assembly according to claim 1, characterized in that: The two end sections are arranged on both sides of the middle section, and the two end sections are respectively arranged close to both sides of the cover plate body.

3. A battery cover assembly according to claim 1, characterized in that: The end section extends to both sides of the middle section, and both sides of the end section are respectively arranged close to both sides of the cover plate body.

4. A battery cover assembly according to claim 1, characterized in that: The connecting piece is connected to the pole by welding.

5. The battery cover assembly according to claim 1, characterized in that: The welding areas of the connecting piece and the pole are both provided with frosted surfaces.

6. A battery cover assembly according to claim 1, characterized in that: The lead-out tab is connected to the end section by welding.

7. The battery cover assembly according to claim 1, characterized in that: The number of the poles and the number of the connecting pieces are both two, the two poles are respectively a positive pole and a negative pole, and the two connecting pieces are respectively a positive pole soft connecting piece and a negative pole soft connecting piece.

8. A battery cover assembly according to claim 7, characterized in that: The positive electrode flexible connecting piece is an aluminum flexible connecting piece, and the negative electrode flexible connecting piece is a copper flexible connecting piece.

9. The battery cover assembly according to claim 1, characterized in that: The cover plate body is an aluminum cover plate or a stainless steel cover plate.

10. A battery, characterized in that: include: A battery cover assembly according to any one of claims 1 to 9; Two battery cell bodies, the two battery cell bodies are arranged on both sides of the cover plate body, the lead-out tabs of the two battery cell bodies are respectively connected to the two end sections, the battery cell body includes a plurality of battery chips, the plurality of battery chips are stacked and connected in sequence, and the battery cell tabs of the plurality of battery chips are stacked and connected in sequence.

Images