Battery cover plate, battery and electric equipment

Abstract

The utility model provides a battery cover plate, battery and electric equipment wherein the battery cover plate comprises: a cover plate body, a liquid injection hole and an explosion-proof valve mounting hole that run through the cover plate body along its thickness direction, the first side of the cover plate body along its thickness direction is provided with a first buffer slot and a first diversion trench, the liquid injection hole is formed in the inner side of the outer contour of the first buffer groove, the anti-explosion valve mounting hole is formed in the outer side of the outer contour of the first buffer groove, the first end of the first flow guide groove is communicated with the first buffer groove, and the second end of the first flow guide groove extends to the side face of the cover plate body. According to the battery cover plate provided by the utility model, electrolyte overflowing from the liquid injection hole can be effectively prevented from flowing into the anti-explosion valve mounting hole to erode the anti-explosion valve through the first buffer groove and the first flow guide groove, so that the anti-explosion valve can be effectively prevented from being damaged, and the yield of battery production is improved.

Description

Technical Field

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

[0002] The battery includes a cover plate, a shell, a battery cell, etc., wherein the battery cell is placed inside the shell, the cover plate is sealed and installed at the upper opening of the shell, and the cover plate is provided with an injection hole for injecting electrolyte into the shell, and an explosion-proof valve for preventing the entire battery from exploding due to excessive temperature and pressure inside the battery. In the related art, when injecting electrolyte into the battery through the injection hole, the electrolyte may overflow from the injection hole and flow into the explosion-proof valve through the upper surface of the battery cover, thereby affecting the performance of the explosion-proof valve. Utility Model Content

[0003] The first aspect of the utility model provides a new technical solution for a battery cover, which can at least solve the problem that the electrolyte overflowing during the injection of the existing battery easily corrodes the explosion-proof valve.

[0004] A second aspect of the utility model provides a battery, comprising the above-mentioned battery cover.

[0005] The third aspect of the utility model provides an electrical device, comprising the above-mentioned battery.

[0006] According to a first aspect of the utility model, a battery cover is provided, comprising: a cover body, an injection hole and an explosion-proof valve mounting hole extending through the cover body along the thickness direction thereof, the cover body being provided with a first buffer groove and a first guide groove on a first side in the thickness direction thereof, wherein the injection hole is located on the inner side of an outer contour of the first buffer groove, the explosion-proof valve mounting hole is located on the outer side of an outer contour of the first buffer groove, a first end of the first guide groove is connected to the first buffer groove, and a second end of the first guide groove extends to a side surface of the cover body.

[0007] Optionally, the injection hole is arranged in the first buffer tank.

[0008] Optionally, the first buffer groove is formed as an annular groove extending along the circumference of the injection hole, and the injection hole is arranged on the inner side of the inner contour of the first buffer groove.

[0009] Optionally, the cover body is provided with a second buffer groove on the first side in its thickness direction, the second buffer groove is formed as an annular groove, the explosion-proof valve mounting hole is located on the inner side of the inner contour of the second buffer groove, and the first buffer groove is located on the outer side of the outer contour of the second buffer groove.

[0010] Optionally, the cover plate body is provided with a second guide groove on a first side in the thickness direction thereof, a first end of the second guide groove is communicated with the second buffer groove, and a second end of the second guide groove extends to a side surface of the cover plate body.

[0011] Optionally, the depth of the first guide groove gradually decreases from the first end of the first guide groove to the second end of the first guide groove; and / or the depth of the second guide groove gradually decreases from the first end of the second guide groove to the second end of the second guide groove.

[0012] Optionally, a cross-sectional profile of the first buffer groove and / or a cross-sectional profile of the second buffer groove is arc-shaped.

[0013] Optionally, the cover plate body is provided with an isolation portion between the first buffer groove and the explosion-proof valve mounting hole on a first side in a thickness direction of the cover plate body.

[0014] Optionally, the isolation portion is formed as an isolation groove or isolation rib extending along the width direction of the cover plate body, and two ends of the isolation portion extend to both sides of the cover plate body in the width direction thereof respectively.

[0015] According to a second aspect of the utility model, a battery is provided, comprising the above-mentioned battery cover.

[0016] According to a third aspect of the utility model, there is provided an electrical device comprising the above-mentioned battery.

[0017] According to the battery cover of the utility model, the electrolyte overflowing from the injection hole can be accommodated by the provided first buffer groove, which can effectively prevent the electrolyte overflowing from the injection hole from flowing to the explosion-proof valve mounting hole to cause erosion to the explosion-proof valve, and the electrolyte in the first buffer groove can be discharged from the side of the cover body by the provided first guide groove, which can effectively prevent the electrolyte from overflowing from the first buffer groove, and can further prevent the electrolyte from flowing to the explosion-proof valve mounting hole to cause erosion to the explosion-proof valve, thereby effectively avoiding damage to the explosion-proof valve and improving the yield of battery production.

[0018] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0020] Figure 1 is a three-dimensional diagram of a battery cover according to an embodiment of the utility model;

[0021] Figure 2is a top view of a battery cover according to an embodiment of the utility model;

[0022] Figure 3 is a top view of a battery cover according to another embodiment of the utility model;

[0023] Figure 4 It is a top view of a battery cover according to another embodiment of the utility model.

[0024] Reference numerals

[0025] Battery cover 10;

[0026] Liquid injection hole 11; explosion-proof valve installation hole 12;

[0027] A first buffer groove 13; a first guide groove 14;

[0028] The second buffer groove 15 ; the second guide groove 16 ; and the isolation portion 17 . DETAILED DESCRIPTION

[0029] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0030] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0031] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0032] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0033] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0034] The battery cover 10 according to the embodiment of the utility model is first described in detail below with reference to the accompanying drawings.

[0035] like Figures 1 to 4 As shown, the battery cover 10 according to the embodiment of the utility model includes: a cover body.

[0036] Specifically, the cover body has an injection hole 11 and an explosion-proof valve mounting hole 12 that penetrate through it along the thickness direction, and the cover body is provided with a first buffer groove 13 and a first guide groove 14 on the first side in the thickness direction, wherein the injection hole 11 is located on the inner side of the outer contour of the first buffer groove 13, the explosion-proof valve mounting hole 12 is located on the outer side of the outer contour of the first buffer groove 13, the first end of the first guide groove 14 is connected to the first buffer groove 13, and the second end of the first guide groove 14 extends to the side of the cover body.

[0037] In other words, if Figures 1 to 4 As shown, the battery cover 10 according to the embodiment of the utility model mainly includes a cover body, wherein the cover body has a first side and a second side arranged oppositely in the thickness direction, the first side of the cover body in the thickness direction can be formed as the outer side of the battery, and the second side of the cover body in the thickness direction can face the battery cell. The cover body is provided with a liquid injection hole 11 and an explosion-proof valve mounting hole 12 that penetrate along the thickness direction thereof, and the liquid injection hole 11 is suitable for connecting with the liquid injection nozzle of the liquid injection device, and the required electrolyte can be provided to the battery through the liquid injection device.

[0038] like Figures 1 to 4 As shown, a first buffer groove 13 is provided on the first side of the cover body in the thickness direction, and the outer contour of the first buffer groove 13 surrounds the outer periphery of the injection hole 11, and the outer contour of the first buffer groove 13 is located on the outside of the explosion-proof valve mounting hole 12, so that the first buffer groove 13 can accommodate the electrolyte overflowing from the injection hole 11, and can effectively prevent the electrolyte overflowing from the injection hole 11 from flowing to the explosion-proof valve mounting hole 12 and causing erosion to the explosion-proof valve.

[0039] like Figures 1 to 4 As shown, the cover body is further provided with a first guide groove 14 on the first side in the thickness direction, the first end of the first guide groove 14 can be connected to the first buffer groove 13, and the second end of the first guide groove 14 can extend to a side surface of the cover body. For example, the second end of the first guide groove 14 can extend to a side surface of the cover body in its width direction, so that the electrolyte in the first buffer groove 13 can be discharged from the side surface of the cover body, which can effectively prevent the electrolyte from overflowing from the first buffer groove 13, and can further prevent the electrolyte from flowing to the explosion-proof valve mounting hole 12 to cause erosion to the explosion-proof valve.

[0040] Therefore, according to the battery cover 10 provided in this embodiment, the first buffer groove 13 can accommodate the electrolyte overflowing from the injection hole 11, which can effectively prevent the electrolyte overflowing from the injection hole 11 from flowing to the explosion-proof valve mounting hole 12 and corroding the explosion-proof valve, and the first guide groove 14 can be provided to discharge the electrolyte in the first buffer groove 13 from the side of the cover body, which can effectively prevent the electrolyte from overflowing from the first buffer groove 13, and can further prevent the electrolyte from flowing to the explosion-proof valve mounting hole 12 and corroding the explosion-proof valve, thereby effectively avoiding damage to the explosion-proof valve and improving the yield of battery production.

[0041] According to an embodiment of the present invention, the liquid injection hole 11 is disposed in the first buffer tank 13 .

[0042] That is to say, Figure 1 and Figure 2 As shown, the first buffer groove 13 can be formed as a circular groove, and the injection hole 11 can be set at the center of the first buffer groove 13. In this embodiment, the electrolyte overflowing from the injection hole 11 is directly located in the first buffer groove 13 and is guided out by the first guide groove 14, which can effectively prevent the overflowed electrolyte from polluting other positions of the cover body, and the structure is simple and easy to manufacture.

[0043] In some embodiments of the present invention, the first buffer groove 13 is formed as an annular groove extending along the circumference of the injection hole 11 , and the injection hole 11 is disposed inside the inner contour of the first buffer groove 13 .

[0044] Specifically, Figure 3 and Figure 4 As shown, the first buffer groove 13 is formed as an annular groove extending along the circumference of the injection hole 11. The diameter of the inner ring of the first buffer groove 13 is larger than the diameter of the injection hole 11, so that the injection hole 11 can be located on the inner side of the inner contour of the first buffer groove 13. For example, the injection hole 11 can be located at the center position of the inner ring of the first buffer groove 13, so that the electrolyte overflowing from the periphery of the injection hole 11 can be accommodated through the annular groove, which can effectively prevent the explosion-proof valve from being damaged.

[0045] According to one embodiment of the utility model, a second buffer groove 15 is provided on the first side of the cover plate body in its thickness direction, and the second buffer groove 15 is formed as an annular groove. The explosion-proof valve mounting hole 12 is located on the inner side of the inner contour of the second buffer groove 15, and the first buffer groove 13 is located on the outer side of the outer contour of the second buffer groove 15.

[0046] That is to say, Figures 1 to 3As shown, the cover body is provided with a second buffer groove 15 on the first side in the thickness direction thereof. The second buffer groove 15 can be formed as an annular groove extending along the circumference of the explosion-proof valve mounting hole 12. The radial dimension of the inner ring of the second buffer groove 15 is greater than the radial dimension of the explosion-proof valve mounting hole 12, so that the explosion-proof valve mounting hole 12 can be located inside the inner contour of the second buffer groove 15. For example, the explosion-proof valve mounting hole 12 can be located at the center of the inner ring of the first buffer groove 13, and the outer contour of the second buffer groove 15 is located at the outer periphery of the first buffer groove 13. When the electrolyte overflowing from the injection hole 11 is large and the injection hole 11 in the first buffer groove 13 cannot be discharged in time, the electrolyte will overflow from the first buffer groove 13 and / or the first guide groove 14. The electrolyte on the outer periphery of the explosion-proof valve mounting hole 12 can be accommodated by the second buffer groove 15, which can further prevent the electrolyte from flowing to the explosion-proof valve mounting hole 12 to cause erosion to the explosion-proof valve, thereby effectively preventing the explosion-proof valve from being damaged.

[0047] In some embodiments of the present invention, a second guide groove 16 is provided on a first side of the cover body in its thickness direction, a first end of the second guide groove 16 is connected to the second buffer groove 15, and a second end of the second guide groove 16 extends to the side of the cover body.

[0048] Specifically, Figures 1 to 3 As shown, the cover body is provided with one or more second guide grooves 16 on the first side in the thickness direction, the first end of the second guide groove 16 can be connected to the second buffer groove 15, and the second end of the second guide groove 16 can extend to a side of the cover body. For example, the second end of the second guide groove 16 can extend to a side of the cover body in its width direction, so that the electrolyte in the second buffer groove 15 can be discharged from the side of the cover body, which can effectively prevent the electrolyte from overflowing from the second buffer groove 15, thereby further preventing the electrolyte from flowing to the explosion-proof valve mounting hole 12 and causing erosion to the explosion-proof valve.

[0049] According to one embodiment of the utility model, the depth of the first guide groove 14 gradually decreases from the first end of the first guide groove 14 to the second end of the first guide groove 14; and / or, the depth of the second guide groove 16 gradually decreases from the first end of the second guide groove 16 to the second end of the second guide groove 16.

[0050] That is to say, the depth of the first guide groove 14 can be gradually reduced from the first end of the first guide groove 14 to the second end of the first guide groove 14, so that the first guide groove 14 can store a certain amount of electrolyte. When the electrolyte overflowing from the injection hole 11 is small, the electrolyte can be temporarily stored by the first buffer groove 13 and the first guide groove 14, which can prevent the electrolyte from flowing to other areas and facilitate subsequent cleaning; when the electrolyte overflowing from the injection hole 11 is large, the electrolyte will be discharged from the second end of the first guide groove 14, which can effectively prevent the electrolyte from flowing to the explosion-proof valve installation hole 12 to erode the explosion-proof valve, thereby effectively preventing the explosion-proof valve from being damaged.

[0051] The depth of the second guide groove 16 can be gradually reduced from the first end of the second guide groove 16 to the second end of the second guide groove 16, so that the second guide groove 16 can store a certain amount of electrolyte. When the electrolyte overflowing from the first buffer groove 13 is small, the electrolyte can be temporarily stored by the second buffer groove 15 and the second guide groove 16, which can prevent the electrolyte from flowing to other areas and facilitate subsequent cleaning; when the electrolyte overflowing from the first buffer groove 13 is large, the electrolyte will be discharged from the second end of the second guide groove 16, which can effectively prevent the electrolyte from flowing to the explosion-proof valve installation hole 12 to erode the explosion-proof valve, thereby effectively preventing the explosion-proof valve from being damaged.

[0052] In some embodiments of the present invention, the cross-sectional profile of the first buffer groove 13 and / or the cross-sectional profile of the second buffer groove 15 is arc-shaped.

[0053] Specifically, the cross-sectional profiles of the first buffer groove 13 and the second buffer groove 15 can both be arc-shaped, thereby avoiding the problem of stress concentration and ensuring the structural strength of the cover plate body.

[0054] According to an embodiment of the present invention, a first side of the cover plate body in the thickness direction thereof is provided with an isolation portion 17 between the first buffer groove 13 and the explosion-proof valve mounting hole 12 .

[0055] That is to say, Figure 4 As shown, the injection hole 11 can be separated from the explosion-proof valve mounting hole 12 in the length direction of the cover body, and the cover body is provided with an isolation portion 17 on the first side in its thickness direction. The isolation portion 17 can be located between the first buffer tank 13 and the explosion-proof valve mounting hole 12, so that the electrolyte overflowing from the first buffer tank 13 can be blocked by the isolation portion 17, and the electrolyte can be effectively prevented from flowing into the explosion-proof valve mounting hole 12 to erode the explosion-proof valve, thereby effectively avoiding damage to the explosion-proof valve.

[0056] In some embodiments of the present invention, the isolation portion 17 is formed as an isolation groove or isolation rib extending along the width direction of the cover plate body, and two ends of the isolation portion 17 extend to both sides of the cover plate body in the width direction thereof.

[0057] Specifically, Figure 4 As shown, the isolation portion 17 is formed as an isolation groove extending along the width direction of the cover body, and the two ends of the isolation groove extend to the two sides of the cover body in the width direction respectively. The isolation groove can separate the first buffer groove 13 from the explosion-proof valve mounting groove. The electrolyte overflowing from the first buffer groove 13 can flow into the isolation groove and then flow out from the two ends of the isolation groove, which can effectively prevent the electrolyte from flowing to the explosion-proof valve mounting hole 12 to erode the explosion-proof valve, thereby effectively avoiding damage to the explosion-proof valve.

[0058] In this embodiment, the isolation portion 17 is also formed as an isolation rib extending along the width direction of the cover body, and the two ends of the isolation rib extend to the two sides of the cover body in its width direction respectively. The isolation rib can separate the first buffer groove 13 from the explosion-proof valve mounting groove. The electrolyte overflowing from the first buffer groove 13 can be stopped by the isolation rib, which can effectively prevent the electrolyte from flowing to the explosion-proof valve mounting hole 12 and corroding the explosion-proof valve, thereby effectively preventing the explosion-proof valve from being damaged.

[0059] The embodiment of the utility model further provides a battery, comprising the battery cover 10 described in any of the above embodiments. Since the battery cover 10 according to the utility model has the above advantages, the battery according to the utility model also has the above advantages, that is, the explosion-proof valve can be effectively prevented from being damaged during the battery production process, and the yield of battery production can be effectively improved.

[0060] The embodiment of the utility model further provides an electric device, the electric device is, for example, but not limited to, a vehicle, and the electric device includes the battery described in the above embodiment. Since the battery according to the utility model has the above advantages, the electric device according to the utility model also has the above advantages, which will not be described in detail in this embodiment.

[0061] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A battery cover, characterized in that: include: A cover plate body, a liquid injection hole (11) and an explosion-proof valve mounting hole (12) extending through the cover plate body in a thickness direction thereof, and a first buffer groove (13) and a first guide groove (14) are provided on a first side of the cover plate body in a thickness direction thereof, wherein: The injection hole (11) is located inside the outer contour of the first buffer groove (13), the explosion-proof valve installation hole (12) is located outside the outer contour of the first buffer groove (13), the first end of the first guide groove (14) is connected to the first buffer groove (13), and the second end of the first guide groove (14) extends to the side of the cover plate body; The cover plate body is provided with an isolation portion (17) between the first buffer groove (13) and the explosion-proof valve mounting hole (12) on a first side in the thickness direction of the cover plate body.

2. The battery cover according to claim 1, characterized in that: The liquid injection hole (11) is arranged in the first buffer groove (13).

3. The battery cover according to claim 1, characterized in that: The first buffer groove (13) is formed as an annular groove extending along the circumference of the liquid injection hole (11), and the liquid injection hole (11) is arranged on the inner side of the inner contour of the first buffer groove (13).

4. The battery cover according to claim 1, characterized in that: The cover plate body is provided with a second buffer groove (15) on the first side in the thickness direction thereof, the second buffer groove (15) is formed as an annular groove, the explosion-proof valve mounting hole (12) is located on the inner side of the inner contour of the second buffer groove (15), and the first buffer groove (13) is located on the outer side of the outer contour of the second buffer groove (15).

5. The battery cover according to claim 4, characterized in that: The cover plate body is provided with a second guide groove (16) on a first side in the thickness direction thereof, a first end of the second guide groove (16) is connected to the second buffer groove (15), and a second end of the second guide groove (16) extends to a side surface of the cover plate body.

6. The battery cover according to claim 5, characterized in that: The depth of the first guide groove (14) gradually decreases from the first end of the first guide groove (14) to the second end of the first guide groove (14); and / or, The depth of the second guide groove (16) gradually decreases from the first end of the second guide groove (16) to the second end of the second guide groove (16).

7. The battery cover according to claim 5, characterized in that: The profile of the cross section of the first buffer groove (13) and / or the profile of the cross section of the second buffer groove (15) is arc-shaped.

8. The battery cover according to claim 1, characterized in that: The isolation portion (17) is formed as an isolation groove or isolation rib extending along the width direction of the cover plate body, and two ends of the isolation portion (17) respectively extend to both sides of the cover plate body in the width direction thereof.

9. A battery, characterized in that: A battery cover comprising the battery cover according to any one of claims 1 to 8.

10. An electrical device, characterized in that: A battery comprising the battery of claim 9.

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