Battery cover plate, battery and electric device

Abstract

The application provides a battery cover plate, a battery and an electric device. The battery cover plate is connected with a battery shell and comprises a cover plate body, a liquid injection hole and an explosion-proof valve are arranged on the cover plate body, a flow guide support is arranged on a side of the cover plate body facing the battery shell, in a horizontal projection plane, the flow guide support is located on the outer side of the explosion-proof valve, at least part of the flow guide support is located below the liquid injection hole, and a through hole is arranged on the flow guide support. The battery cover plate provided by the application can improve the infiltration rate of electrolyte and avoid liquid overflow during liquid injection.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a battery cover, a battery, and an electrical device. Background Technology

[0002] The traditional battery manufacturing process involves square aluminum-cased cells undergoing a vacuum baking process before entering the electrolyte injection process. To improve the cycle life and electrical performance of the cells, the current electrolyte injection method involves injecting the electrolyte into the battery through the injection hole, and then slowly wetting the inside of the cell through capillary force. However, this method can lead to electrolyte overflow in mass production, which seriously affects the production cycle, causes rework, and results in a waste of manpower and materials. Utility Model Content

[0003] In order to overcome the defects in the prior art, this utility model provides a battery cover, a battery and an electrical device, which can improve the electrolyte wetting rate and avoid leakage during electrolyte injection.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] The first aspect of this utility model discloses a battery cover, which is connected to a battery casing and includes:

[0006] The cover plate body is provided with a liquid injection hole and an explosion-proof valve;

[0007] A flow guide bracket is provided on the side of the cover plate body facing the battery casing. On the horizontal projection plane, the flow guide bracket is located outside the explosion-proof valve, and at least part of the flow guide bracket is located below the injection hole. The flow guide bracket is provided with a through hole.

[0008] The battery cover in this application has a flow guide bracket on the side of the cover facing the battery cell to increase the electrolyte flow channel, and a through hole for electrolyte to pass through on the flow guide bracket, thereby realizing multi-channel electrolyte injection. This can improve the electrolyte wetting efficiency, prevent the battery cell from overflowing during the electrolyte injection process, reduce material waste, and place the flow guide bracket in an area other than below the explosion-proof valve. This can provide space for the explosion-proof layout of the battery cell, avoid the situation where the explosion-proof valve cannot be opened in time due to being blocked by the flow guide bracket, and reduce the safety risk of the battery.

[0009] Furthermore, the flow guide bracket is provided with at least one flow guide groove, and the through hole is disposed within at least one of the flow guide grooves. The flow guide grooves enable rapid flow of electrolyte and accelerate the wetting rate of the electrolyte.

[0010] Furthermore, the flow guide bracket includes a bracket body and at least two protruding ridges extending from the bracket body toward the cover plate body. The at least two protruding ridges are spaced apart on the bracket body, and any two adjacent protruding ridges form the flow guide groove with the bracket body. This serves to guide and channel the electrolyte.

[0011] Furthermore, the flow guide bracket includes a first flow guide bracket extending along the length direction of the cover plate body and a second flow guide bracket extending along the width direction of the cover plate body, both of which are provided with through holes. This allows the electrolyte to flow smoothly along the flow guide bracket to multiple areas of the battery cell, accelerating the electrolyte wetting rate.

[0012] Furthermore, the flow guide bracket includes multiple first flow guide brackets and second flow guide brackets, and each of the multiple first flow guide brackets and second flow guide brackets is provided with at least one flow guide groove. The first flow guide brackets and the second flow guide brackets are connected through at least one flow guide groove. This allows the electrolyte to flow along the multiple flow guide brackets, preventing electrolyte overflow and shortening the injection time.

[0013] Furthermore, the flow guide bracket is provided with a connecting part, and the flow guide bracket and the cover plate are connected through the connecting part to fix the flow guide bracket on the side of the cover plate facing the battery cell.

[0014] Furthermore, the flow guide bracket is provided with at least one connecting portion, and at least one connecting portion is arranged close to the symmetrical line of the cover plate body. This ensures that the lengths of the flow guide brackets on both sides of the connecting portion are consistent, thereby guaranteeing the balance of the flow guide bracket fixation and improving the structural stability of the flow guide bracket.

[0015] Furthermore, on the horizontal projection plane, the through hole is located outside the injection hole. This allows the electrolyte to be guided more quickly into the flow channels of the multiple flow guide supports, increasing the injection speed and reducing the injection time.

[0016] The second aspect of this utility model discloses a battery, the battery including the battery cover plate described in any one of the first aspects.

[0017] The third aspect of this utility model discloses an electrical device, which includes the battery described in the second aspect.

[0018] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0019] This application achieves multi-channel electrolyte injection by setting a flow guide bracket on the side of the cover plate facing the battery cell to increase the electrolyte flow channel, and setting through holes on the flow guide bracket for electrolyte passage. This can improve the electrolyte wetting efficiency, prevent the battery cell from overflowing during the electrolyte injection process, reduce material waste, and place the flow guide bracket in an area outside the explosion-proof valve. This provides space for the explosion-proof layout of the battery cell and avoids the situation where the explosion-proof valve cannot be opened in time due to being blocked by the flow guide bracket, thereby reducing the safety risks of the battery.

[0020] To make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a top view of a cover plate provided in an embodiment of this application;

[0023] Figure 2 This is a side view of a cover plate provided in an embodiment of this application;

[0024] Figure 3 This is a top view of a flow guide bracket provided in an embodiment of this application;

[0025] Figure 4 This is a perspective view of a flow guide bracket provided in an embodiment of this application;

[0026] Figure 5 This is a structural diagram of a battery provided in an embodiment of this application.

[0027] The reference numerals in the above figures are as follows: 1. Cover plate body; 2. Injection hole; 3. Explosion-proof valve; 4. Lower plastic; 5. First flow guide bracket; 6. Second flow guide bracket; 7. Through hole; 8. Bracket body; 9. Protruding ridge; 10. Connecting part. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. In addition, the accompanying drawings of the present invention are only simple schematic illustrations and are not depictions based on actual dimensions, as stated in advance.

[0029] In this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "forward," "backward," "between," "nearer," and "farthest" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. It should also be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] It should be understood that while terms such as "first," "second," and "third" may be used in this document to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another, or one signal from another. Furthermore, the term "or" as used herein should, as appropriate, include any combination of one or more of the related listed items.

[0031] Reference Figures 1-4 As shown in the figure, this application embodiment provides a battery cover plate, which is used to connect with the battery housing to seal the battery housing. It includes a cover plate body 1 and a flow guide bracket disposed on the side of the cover plate body 1 facing the inside of the battery housing. The flow guide bracket is used to guide the electrolyte and increase the flow channel of the electrolyte to improve the wetting efficiency of the electrolyte.

[0032] Specifically, the cover plate body 1 is provided with a liquid injection hole 2, an explosion-proof hole and an alternately arranged pole post. An explosion-proof valve 3 is provided in the explosion-proof hole, and a lower plastic 4 is provided on the side of the cover plate body 1 facing the battery cell.

[0033] The flow guide bracket is located on the side of the cover plate body 1 with the lower plastic 4, and below the lower plastic 4. On the horizontal projection plane, the flow guide bracket is located in the outer area of ​​the explosion-proof valve 3 to prevent the flow guide bracket from melting and blocking the through hole inside when the internal temperature of the battery is too high, thereby hindering the opening of the explosion-proof valve 3 and causing a safety hazard. In addition, at least part of the flow guide bracket is located inside the injection hole 2 to realize the flow of electrolyte. The flow guide bracket is provided with a through hole 7 for the flow of electrolyte.

[0034] In some embodiments, the flow guide can be configured as a strip, a curved shape, or other shapes.

[0035] like Figure 1 and Figure 3As shown, in this embodiment, the flow guide bracket is elongated and includes a first flow guide bracket 5 extending along the length direction of the cover plate body 1 and a second flow guide bracket 6 extending along the width direction of the cover plate body 1. Both the first flow guide bracket 5 and the second flow guide bracket 6 are provided with through holes 7.

[0036] In some embodiments, both the first flow guide bracket 5 and the second flow guide bracket 6 are provided with at least one through hole. When multiple through holes 7 are provided, the multiple through holes 7 are arranged at intervals along the extending directions of the first flow guide bracket 5 and the second flow guide bracket 6.

[0037] In some embodiments, the flow guide bracket includes at least one first flow guide bracket 5 and at least one second flow guide bracket 6, and the connection position of the first flow guide bracket 5 and the second flow guide bracket 6 can be arbitrarily set.

[0038] In this embodiment, the cover plate body 1 is connected to two first flow guide brackets 5 extending along the length direction of the cover plate body 1 and a second flow guide bracket 6 extending along the width direction of the cover plate body 1. The two first flow guide brackets 5 are spaced apart and symmetrically arranged on both sides of the explosion-proof valve 3 to ensure the overall stability of the flow guide brackets. Part of the second flow guide bracket 6 is located below the injection hole 2 to guide the electrolyte.

[0039] It should be noted that the location, shape, and number of the flow guide brackets can be set according to the actual situation. The flow guide brackets described in this application embodiment are only for illustrative purposes and do not limit their specific structure.

[0040] In one possible embodiment, on the horizontal projection plane, the through hole 7 is located in the outer region of the injection hole 2 to facilitate smoother injection of the electrolyte onto the flow guide bracket, thereby guiding the electrolyte along the flow guide bracket. The horizontal projection plane is the projection plane obtained from a top view of the cover plate body 1.

[0041] Optionally, the flow guide bracket and the lower plastic 4 are made of the same material. In some embodiments, the flow guide bracket is made of plastic, such as polypropylene (PP).

[0042] To facilitate the flow of electrolyte on the flow guide bracket, at least one flow guide groove is provided on the flow guide bracket, and a through hole 7 is provided in at least one flow guide groove. The flow guide direction of the flow guide groove is the same as the extension direction of the flow guide bracket.

[0043] Furthermore, each of the two first flow guide supports 5 and the second flow guide support 6 is provided with at least one flow guide groove, and the first flow guide support 5 and the second flow guide support 6 are connected through at least one flow guide groove.

[0044] In one possible embodiment, the first flow guide bracket 5 and the second flow guide bracket 6 both include a bracket body 8 and at least two protruding ridges 9 extending from the bracket body 8 toward the cover plate body 1. The at least two protruding ridges 9 are spaced apart on the bracket body 8, and any two adjacent protruding ridges 9 form the flow guide groove with the bracket body 8.

[0045] It should be noted that the flow guide bracket may have only one flow guide groove or two or more flow guide grooves, and this application does not make a specific limitation.

[0046] In some embodiments, the flow guide bracket can be connected to the lower plastic 4 via the protrusion 9 or the flow guide bracket can be connected to the lower plastic 4 in other ways, thereby fixing the flow guide bracket to the side of the cover plate body 1 facing the battery cell.

[0047] like Figure 2 and Figure 4 As shown, the flow guide bracket is provided with a connecting part 10, and the flow guide bracket and the lower plastic 4 are connected through the connecting part 10.

[0048] In some embodiments, the connecting portion 10 may be configured as a column, a ball, or other shape.

[0049] In one possible embodiment, the flow guide bracket is provided with a connecting part 10, and the connecting part 10 is arranged close to the symmetrical line of the cover plate body 1 to ensure the stability of the flow guide bracket connection.

[0050] In other possible embodiments, the flow guide bracket is provided with two or more connecting parts 10, and the two or more connecting parts 10 are spaced apart.

[0051] It should be noted that the position and structure of the connecting part 10 can be set according to the actual situation. The connecting parts shown in this application specification and drawings are only for illustrative purposes and are not intended to limit the scope of the application.

[0052] like Figure 5 As shown in the figure, this application embodiment also provides a battery, the battery including a housing, a battery cell disposed in the housing, and a battery cover plate as described in the above embodiment, the battery cover plate being disposed on the top of the housing to close the housing.

[0053] This application also provides an electrical device, which includes the battery described in the above embodiments.

[0054] This utility model uses specific embodiments to illustrate the principle and implementation of the utility model. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​the utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​the utility model. Therefore, the content of this specification should not be construed as a limitation of the utility model.

Claims

1. A battery cover plate connected with a battery case, characterized by, The battery cover plate comprises: a cover plate body, which is provided with a liquid injection hole and an explosion-proof valve; a flow guide support, which is arranged on the side of the cover plate body facing the battery case, and in a horizontal projection plane, the flow guide support is located outside the explosion-proof valve and at least part of the flow guide support is located below the liquid injection hole, and the flow guide support is provided with a through hole.

2. The battery cover plate of claim 1, wherein, The flow guide support is provided with at least one flow guide groove, and the through hole is arranged in at least one flow guide groove.

3. The battery cover plate of claim 2, wherein, The flow guide support comprises a support body and at least two convex edges extending from the support body towards the cover plate body, and at least two convex edges are arranged on the support body in a spaced manner, and any two adjacent convex edges and the support body form the flow guide groove.

4. The battery cover plate of claim 1, wherein, The flow guide support comprises a first flow guide support extending along the length direction of the cover plate body and a second flow guide support extending along the width direction of the cover plate body, and the first flow guide support and the second flow guide support are both provided with a through hole.

5. The battery cover plate of claim 4, wherein, The flow guide support comprises a plurality of first flow guide supports and second flow guide supports, and the plurality of first flow guide supports and second flow guide supports are both provided with at least one flow guide groove, and the first flow guide support and the second flow guide support are communicated through the at least one flow guide groove.

6. The battery cover plate of claim 1, wherein, The flow guide support is provided with a connecting portion, and the flow guide support and the cover plate are connected through the connecting portion.

7. A battery cover plate according to claim 6, wherein The flow guide support is provided with at least one connecting portion, and the at least one connecting portion is arranged close to the symmetry line of the cover plate body.

8. The battery cover plate of claim 1, wherein, In a horizontal projection plane, the through hole is located outside the liquid injection hole.

9. A battery, characterized by The battery comprises the battery cover plate according to any one of claims 1 to 8.

10. An electric device, characterized by The electric device comprises the battery according to claim 9.

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