A cover plate and a battery

Abstract

The utility model discloses a cover plate and a battery, and relates to the technical field of batteries. A cover plate comprises: a cover plate body; a positive pole and a negative pole connected to the cover plate body; a first receiving hole and at least two injection holes connected to each other and arranged on the cover plate body; and a pressure relief valve matched with the first receiving hole. A battery comprises a cover plate. The technical effect of the utility model is that it is simple to inject liquid and has high injection efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a cover plate and a battery. Background Art

[0002] A battery is a device that converts chemical energy into electrical energy. It has the advantage of good conversion performance and generally includes lithium batteries, lead-acid batteries, etc.

[0003] Electrolyte is an important component of the battery and is mainly used for electrochemical reactions. However, the related battery filling is difficult and the filling efficiency is low, which makes it difficult to meet the demand for large filling volumes. Utility Model Content

[0004] In view of the above technical problems, the utility model provides a cover plate and a battery, which have simple liquid injection and high liquid injection efficiency.

[0005] In order to solve the above problems, the technical solution provided by the utility model is:

[0006] A cover plate, comprising:

[0007] Cover plate body;

[0008] Both are connected to the positive pole and the negative pole on the cover plate body;

[0009] A first receiving hole and at least two liquid injection holes are connected to each other and are arranged on the cover body;

[0010] A pressure relief valve cooperates with the first receiving hole.

[0011] Optionally, also include:

[0012] At least two second receiving holes are provided on the cover body, one end of the at least two second receiving holes is communicated with the first receiving hole, and the other end of the at least two second receiving holes is communicated with the at least two injection holes correspondingly;

[0013] At least two sealing plugs are correspondingly located in the at least two second accommodating holes.

[0014] Optionally, the at least two second receiving holes are circular or elliptical in shape.

[0015] Optionally, the number of the at least two injection holes and the at least two second receiving holes are both in the range of 2-5.

[0016] Optionally, the first receiving hole is in an elliptical, circular or rectangular shape.

[0017] Optionally, the at least two injection holes are circular in shape.

[0018] Optionally, the thickness of the cover body ranges from 2 to 6 mm.

[0019] Optionally, the positive electrode column and the negative electrode column are arranged axially symmetrically with respect to the first receiving hole.

[0020] Optionally, the pressure relief valve and the first receiving hole are welded.

[0021] A battery includes a cover plate.

[0022] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0023] 1) The cover plate facilitates simultaneous liquid injection and vacuum extraction, thereby making liquid injection simple and efficient;

[0024] 2) The number of injection holes is preferably at least three, so that at least two injection holes can be used for injection at the same time, thereby further improving the injection efficiency;

[0025] 3) The first receiving hole and at least two injection holes are interconnected, which is equivalent to the first receiving hole covering the two injection holes, so that the pressure relief valve and the first receiving hole only need to be welded once, thereby avoiding the complicated welding process that may be caused by introducing multiple injection holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of a cover plate proposed in an embodiment of the utility model;

[0027] Figure 2 A schematic diagram of a partial structure of a cover plate proposed in an embodiment of the utility model;

[0028] Figure 3 A partial cross-sectional view of a cover plate proposed in an embodiment of the utility model;

[0029] In the figure: 1. cover plate body; 21. positive pole; 22. negative pole; 3. first receiving hole; 4. liquid injection hole; 5. pressure relief valve; 6. second receiving hole. DETAILED DESCRIPTION

[0030] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings and embodiments.

[0031] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It should also be noted that, for the convenience of description, only the parts related to the utility model are shown in the accompanying drawings. The words "first", "second", etc. described in the present utility model are set for the convenience of describing the technical solution of the present utility model, and have no specific limiting effect. They are all general references and do not constitute a limiting effect on the technical solution of the present utility model. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments in the present application can be combined with each other. In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection between the insides of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. Multiple technical solutions in the same embodiment, and multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions that do not have contradictions or conflicts, all of which are within the scope of protection required by the present utility model.

[0032] Example 1

[0033] Combined with Figure 1-3 , this embodiment provides a cover plate, including:

[0034] Cover plate body 1;

[0035] Both are connected to the positive pole 21 and the negative pole 22 on the cover body 1;

[0036] The first receiving hole 3 and at least two liquid injection holes 4 are connected to each other and are arranged on the cover body 1;

[0037] A pressure relief valve 5 cooperates with the first accommodating hole 3 .

[0038] Specifically, when injecting liquid, first, connect one of the injection holes 4 to the vacuum pumping device, and connect the other injection holes 4 to the injection cup; then, the injection cup injects liquid into the battery through the injection hole 4, and at the same time, the vacuum pumping device performs vacuum pumping to form a negative pressure inside the battery, so that the electrolyte quickly flows into the battery; in summary, the cover plate facilitates simultaneous injection and vacuum pumping, thereby making the injection simple and efficient.

[0039] Among them, the cover plate body 1 is used to carry the positive electrode column 21, the negative electrode column 22 and the first receiving hole 3, etc.; the positive electrode column 21 is used to connect to the positive electrode of the battery, and the negative electrode column 22 is used to connect to the negative electrode of the battery; the first receiving hole 3 is used to accommodate the pressure relief valve 5, and the pressure relief valve 5 is used to play a protective role. In order to increase the sealing performance, the connection method between the first receiving hole 3 and the pressure relief valve 5 is preferably welding; the first receiving hole 3 and at least two injection holes 4 are interconnected, which is equivalent to the first receiving hole 3 covering the two injection holes 4, so that the pressure relief valve 5 and the first receiving hole 3 only need to be welded once, thereby avoiding the complicated welding process that may be caused by introducing multiple injection holes 4; the number of injection holes 4 is preferably at least three, so that at least two injection holes 4 are used for simultaneous injection, thereby further improving the injection efficiency.

[0040] Further, such as Figure 2-3 , also includes:

[0041] At least two second receiving holes 6 are provided on the cover body 1, one end of the at least two second receiving holes 6 is connected to the first receiving hole 3, and the other end of the at least two second receiving holes 6 is connected to the at least two injection holes 4 correspondingly;

[0042] There are at least two sealing plugs correspondingly located in at least two second receiving holes 6 .

[0043] Specifically, it is equivalent to that the first receiving hole 3 covers at least two second receiving holes 6 and at least two injection holes 4, so that the pressure relief valve 5 and the first receiving hole 3 only need to be welded once, thereby avoiding the complicated welding process that may be caused by introducing multiple injection holes 4, wherein the second receiving hole 6 is used to accommodate the sealing plug, and the sealing plug is used for sealing, and the material of the sealing plug can be fluororubber, nitrile rubber, etc.

[0044] Further, such as Figure 2 At least two second receiving holes 6 are circular or elliptical in shape.

[0045] Further, such as Figure 2-3 The number of at least two injection holes 4 and at least two second receiving holes 6 is in the range of 2-5.

[0046] Specifically, the number of the at least two injection holes 4 and the at least two second receiving holes 6 can be 2, 3, 5, etc., which can be determined according to the size of the first receiving hole 3.

[0047] Further, such as Figure 2 The shape of the first receiving hole 3 is oval, circular or rectangular.

[0048] Further, such as Figure 2 At least two injection holes 4 are circular in shape.

[0049] Further, such as Figure 3 The thickness of the cover body 1 is in the range of 2-6 mm.

[0050] Specifically, the thickness of the cover body 1 can be 2 mm, 3 mm or 6 mm.

[0051] Further, such as Figure 1-2 The positive electrode column 21 and the negative electrode column 22 are arranged axially symmetrically with respect to the first receiving hole 3 .

[0052] Specifically, the axisymmetric arrangement facilitates increasing the axisymmetry of the positive electrode column 21 and the negative electrode column 22, thereby facilitating a reasonable layout of the battery.

[0053] Furthermore, the pressure relief valve 5 and the first accommodating hole 3 are welded.

[0054] Example 2

[0055] Combined with Figure 1-3 , this embodiment provides a battery, including a cover plate as in Embodiment 1.

[0056] Specifically, the liquid injection method and sealing process path of the battery are as follows: first, one of the liquid injection holes 4 is connected to the vacuum pumping device, and the other liquid injection holes 4 are connected to the liquid injection cup; then, the liquid injection cup injects liquid into the battery through the liquid injection hole 4, and at the same time, the vacuum pumping device performs vacuum pumping to form a negative pressure inside the battery, so that the electrolyte quickly flows into the battery; then, at least two sealing plugs and at least two second receiving holes 6 are matched accordingly; further, after the electrolyte is infiltrated, the sealing plugs are removed, and the battery is negatively charged and formed; finally, nitrogen is injected into the battery, and at least two sealing plugs and at least two second receiving holes 6 are matched accordingly again to prevent subsequent welding slag from falling into the battery, and the pressure relief valve 5 is welded in the first receiving hole 3.

[0057] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A cover plate, characterized in that: include: Cover plate body; Both are connected to the positive pole and the negative pole on the cover body; A first receiving hole and at least two liquid injection holes are connected to each other and are arranged on the cover body; A pressure relief valve cooperates with the first receiving hole.

2. A cover plate according to claim 1, characterized in that: Also includes: At least two second receiving holes are provided on the cover body, one end of the at least two second receiving holes is communicated with the first receiving hole, and the other end of the at least two second receiving holes is communicated with the at least two injection holes correspondingly; At least two sealing plugs are correspondingly located in the at least two second accommodating holes.

3. A cover plate according to claim 2, characterized in that: The at least two second receiving holes are in a circular or elliptical shape.

4. A cover plate according to claim 2, characterized in that: The number of the at least two injection holes and the at least two second receiving holes are both in the range of 2-5.

5. A cover plate according to any one of claims 1 to 4, characterized in that: The first receiving hole has an elliptical shape, a circular shape or a rectangular shape.

6. A cover plate according to any one of claims 1 to 4, characterized in that: The at least two injection holes are circular in shape.

7. A cover plate according to any one of claims 1 to 4, characterized in that: The thickness of the cover plate body ranges from 2 to 6 mm.

8. A cover plate according to any one of claims 1 to 4, characterized in that: The positive electrode column and the negative electrode column are arranged in an axisymmetric manner with respect to the first receiving hole.

9. A cover plate according to any one of claims 1 to 4, characterized in that: The pressure relief valve and the first accommodating hole are welded.

10. A battery, characterized in that: It comprises a cover plate as described in any one of claims 1 to 9.

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