Battery top cover plate, battery top cover and battery

Abstract

The utility model relates to the technical field of batteries, in particular to a battery top cover plate, a battery top cover and a battery. The battery top cover plate provided by the utility model comprises a first layer plate and a second layer plate, the first layer plate is an aluminum plate, the second layer plate is connected to one side, facing a battery cell, of the first layer plate, and the second layer plate comprises a copper plate. When the battery shell is applied, the first layer plate is an aluminum plate, so that the first layer plate and the battery shell can be conveniently welded with each other. The second-layer plate is a copper plate which is excellent in heat-conducting property, so that the heat dissipation capability of the battery top cover plate can be effectively improved. And moreover, the structural strength of the copper plate is relatively high, so that the second-layer plate can ensure that the whole battery top cover plate has enough structural strength.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery top cover plate, a battery top cover and a battery. Background Art

[0002] Lithium batteries have the advantages of small size, light weight, stable working voltage, low self-discharge rate, long cycle life, no memory effect, and low environmental pollution, and are widely used. Due to the active chemical properties of lithium metal and the increasing demand for fast charging of lithium batteries, the temperature of lithium batteries is high during charging and use. In current technology, battery heat dissipation is mainly carried out through the pole, battery housing, and battery cover. The existing battery cover is made of pure aluminum, which has poor heat dissipation effect. Utility Model Content

[0003] In view of this, the present application provides a battery top cover plate, a battery top cover and a battery, which can effectively improve the heat dissipation capacity of the battery top cover plate.

[0004] In a first aspect, the present application provides a battery top cover plate, comprising: a first layer plate, the first layer plate is an aluminum plate; and a second layer plate, connected to a side of the first layer plate facing the battery cell, the second layer plate comprising a copper plate.

[0005] In combination with the first aspect, in a possible implementation manner, the first layer board is provided with a matching structure matching with the second layer board, and the second layer board is matchedly connected in the matching structure.

[0006] In combination with the first aspect, in a possible implementation manner, the matching structure is a groove, the groove is arranged on a side surface of the first layer plate close to the battery core, and the second layer plate is embedded and connected in the groove.

[0007] In combination with the first aspect, in a possible implementation, the matching structure is an avoidance gap, the avoidance gap is arranged at the side end of the first layer plate along the first direction, and the avoidance gap is located on the side surface of the first layer plate close to the battery cell, and the second layer plate is arranged in the avoidance gap.

[0008] In combination with the first aspect, in a possible implementation, the number of the second layer plates is two, and the two second layer plates are spaced apart along the first direction on a side surface of the first layer plate close to the battery cell, each of the second layer plates is provided with a through hole along the thickness direction for passing the pole, and the first layer plate is provided with an installation hole at a position corresponding to the through hole.

[0009] In combination with the first aspect, in a possible implementation, the edge distance d between the first side edge of the first layer board and the second side edge of the second layer board is 1 All meet: 1mm≤d1 ≤3mm; the projection of the second side edge on the first layer is located in the enclosed area of ​​the first side edge.

[0010] In combination with the first aspect, in a possible implementation manner, the thickness d of the first layer of the board is 2 ≥0.5mm; and / or, the thickness of the second layer d 3 ≥0.3mm.

[0011] In combination with the first aspect, in a possible implementation, the thickness d of the second layer of the board is 3 The thickness ratio of the battery top cover plate to the thickness D satisfies: 35% ≤ d 3 / D≤75%.

[0012] In a second aspect, the present application provides a battery top cover, comprising: the aforementioned battery top cover plate; and a pole, which is arranged through the first layer plate and the second layer plate.

[0013] In a third aspect, the present application provides a battery, comprising: a shell having an opening at one end; a battery cell disposed in the shell; and the aforementioned battery top cover, covering the opening of the shell.

[0014] When the present application is applied, the first layer is an aluminum plate, so that the first layer and the battery housing can be welded to each other. The second layer is a copper plate, which has excellent thermal conductivity and can effectively improve the heat dissipation capacity of the battery top cover. In addition, the copper plate has a high structural strength, so the second layer can ensure that the entire battery top cover has sufficient structural strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Shown is a schematic diagram of the overall structure of a battery top cover provided in one embodiment of the present application.

[0016] Figure 2 Shown is a partial structural schematic diagram of a battery top cover provided in one embodiment of the present application.

[0017] Figure 3 Shown is a partial structural schematic diagram of a battery top cover plate provided in another embodiment of the present application.

[0018] Figure 4 Shown is a partial structural schematic diagram of a battery top cover plate provided in another embodiment of the present application. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0020] An exemplary battery top cover plate is as follows:

[0021] Figure 1 The figure shows a schematic diagram of the overall structure of a battery top cover provided by an embodiment of the present application. The present application provides a battery top cover plate. In one embodiment, as Figure 1 As shown, the battery top cover plate includes a first plate 1 and a second plate 2. The first plate 1 is an aluminum plate, the second plate 2 is connected to the side of the first plate 1 facing the battery core, and the second plate 2 includes a copper plate.

[0022] When this embodiment is used, the first layer plate 1 is an aluminum plate, so that the first layer plate 1 and the battery housing can be welded to each other. The second layer plate 2 is a copper plate, which has excellent thermal conductivity and can effectively improve the heat dissipation capacity of the battery top cover plate. In addition, the structural strength of the copper plate is relatively high, so the second layer plate 2 can ensure that the entire battery top cover plate has sufficient structural strength. The first layer plate 1 and the second layer plate 2 can be combined into an integrated structure by integral molding, or formed into an integrated structure by mechanical connection.

[0023] In one embodiment, the first layer plate 1 is provided with a matching structure matching with the second layer plate 2, and the second layer plate 2 is matched and connected in the matching structure. The matching structure can ensure the stability and firmness of the mutual connection between the first layer plate 1 and the second layer plate 2, avoid relative displacement between the first layer plate 1 and the second layer plate 2, and ensure the overall structural tightness of the battery top cover plate.

[0024] Figure 2 Shown is a partial structural schematic diagram of a battery top cover provided in one embodiment of the present application. Figure 3 FIG. 1 is a partial structural schematic diagram of a battery top cover provided by another embodiment of the present application. Figure 2 and Figure 3 As shown, the matching structure is a groove 101, which is arranged on a side surface of the first layer board 1 close to the battery cell, and the second layer board 2 is embedded and connected in the groove 101. The groove 101 limits and fixes the second layer board 2 from the periphery of the second layer board 2.

[0025] Figure 4 FIG. 1 is a partial structural schematic diagram of a battery top cover provided by another embodiment of the present application. Figure 4As shown, the matching structure is an avoidance gap 102, which is arranged at the side end of the first layer 1 along the first direction, and the avoidance gap 102 is located on the side surface of the first layer 1 close to the battery cell, and the second layer 2 is arranged in the avoidance gap 102, and the side wall of the avoidance gap 102 limits and fixes the second layer 2.

[0026] In one embodiment, referring to Figure 2 As shown, the number of the second layer plates 2 is two, and the two second layer plates 2 are arranged at intervals along the first direction on a side surface of the first layer plate 1 close to the battery core. Figure 1 and Figure 2 The middle is horizontal, each second layer plate 2 is provided with a through hole for inserting the pole 3 along the thickness direction, and the first layer plate 1 is provided with a mounting hole at a position corresponding to the through hole. In this embodiment, the pole 3 passes through the through hole of the second layer plate 2 and the mounting hole of the first layer plate 1 in sequence, and the second layer plate 2 can contact with the pole 3 and perform heat exchange, so that the pole 3 can be cooled.

[0027] In one embodiment, if Figure 1 , Figure 2 and Figure 3 As shown, the edge distance d between the first side edge of the first layer board 1 and the second side edge of the second layer board 2 is 1 All meet: 1mm≤d 1 ≤3mm. The projection of the second side edge on the first layer board 1 is located in the enclosed area of ​​the first side edge. In this embodiment, the first side edge protrudes from the second side edge, which can facilitate the welding operation on the edge of the first layer board 1, so as to weld the first side edge of the first layer board 1 and the battery housing to each other.

[0028] In one embodiment, referring to Figure 3 , the thickness of the first layer 1 is d 2 ≥0.5mm, to ensure that the first layer 1 has sufficient structural strength, and the first layer 1 of sufficient thickness is easy to weld, and is not prone to problems such as welding burn-through, post-weld deformation, poor weld formation, and pores. The thickness of the second layer 2 is d 3 ≥0.3mm to ensure that the second layer 2 has sufficient structural strength. Sufficient thickness of the first layer 1 and the second layer 2 can ensure the structural strength of the battery top cover.

[0029] In one embodiment, referring to Figure 2 and Figure 3 , the thickness of the second layer 2 is d 3 The thickness ratio of the battery top cover plate to the thickness D satisfies: 35% ≤ d 3 / D≤75%. In this embodiment, the thickness d of the second layer 2 is 3The thickness of the second layer 2 is limited so as to be large enough to ensure the structural strength of the entire battery top cover.

[0030] An exemplary battery cap and battery are as follows:

[0031] The present application also provides a battery top cover. In one embodiment, the battery top cover includes the aforementioned battery top cover plate and a pole 3, and the pole 3 is arranged through the first layer plate 1 and the second layer plate 2. The number of the second layer plates 2 can be set to two, and the two second layer plates 2 are respectively arranged at the corresponding positions of the two poles 3 to cool the poles 3 at the same time.

[0032] The present application also provides a battery, which includes a shell and the aforementioned battery top cover, one end of the shell has an opening, the battery cell is arranged in the shell, and the battery top cover is covered on the opening of the shell.

[0033] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0034] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0035] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0036] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features of this utility model.

[0037] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A battery top cover plate, characterized in that: include: A first layer plate (1), wherein the first layer plate (1) is an aluminum plate, and the first layer plate (1) is provided with a matching structure matching with the second layer plate (2); and The second layer plate (2) is connected to the side of the first layer plate (1) facing the battery core, the second layer plate (2) comprises a copper plate, and the second layer plate (2) is connected in a matching structure.

2. The battery top cover plate according to claim 1, characterized in that: The matching structure is a groove (101), the groove (101) is arranged on a side surface of the first layer plate (1) close to the battery core, and the second layer plate (2) is embedded and connected in the groove (101).

3. The battery top cover plate according to claim 1, characterized in that: The matching structure is an avoidance notch (102), the avoidance notch (102) being arranged at a side end portion of the first layer plate (1) along a first direction, and the avoidance notch (102) being located on a side surface of the first layer plate (1) close to the battery core, and the second layer plate (2) being arranged in the avoidance notch (102).

4. The battery top cover plate according to claim 1, characterized in that: The number of the second layer plates (2) is two, and the two second layer plates (2) are arranged at intervals along a first direction on a surface of a side of the first layer plate (1) close to the battery cell, each second layer plate (2) is provided with a through hole for passing a pole (3) along a thickness direction, and the first layer plate (1) is provided with a mounting hole at a position corresponding to the through hole.

5. The battery top cover plate according to claim 1, characterized in that: The edge distance d1 between the first side edge of the first layer board (1) and the second side edge of the second layer board (2) both satisfies: 1mm≤d1≤3mm; The projection of the second side edge on the first layer board (1) is located within the enclosed area of ​​the first side edge.

6. The battery top cover plate according to claim 1, characterized in that: The thickness d2 of the first layer (1) is ≥ 0.5 mm; and / or, The thickness d3 of the second layer (2) is ≥ 0.3 mm.

7. The battery top cover plate according to claim 1, characterized in that: The thickness ratio of the thickness d3 of the second layer plate (2) to the thickness D of the battery top cover plate satisfies: 35%≤d3 / D≤75%.

8. A battery top cover, characterized in that: include: The battery top cover plate according to any one of claims 1 to 7; as well as A pole (3) is arranged through the first layer plate (1) and the second layer plate (2).

9. A battery, characterized in that: include: a housing having an opening at one end; A battery cell, disposed in the housing; as well as The battery top cover as claimed in claim 8, covering the opening of the shell.

Images