Battery cover plate and single battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery cover plate and a single battery. The battery cover plate comprises a pole piece, a cover plate piece and a pin, the pole piece comprises an abutting part and a penetrating part, and the penetrating part is connected to one end of the abutting part at an angle. The penetrating part is arranged on the cover plate piece in a penetrating mode, and the abutting part abuts against the cover plate piece. The pins and the abutting parts are located on the two sides of the cover plate piece in the thickness direction respectively, and the pins are connected to the penetrating parts. The pole piece can be bent through stamping, so that the abutting part and the penetrating part are connected at an angle, the pole piece forms an L-shaped structure, the abutting part abuts against the upper part of the cover plate piece and is used for being electrically connected with external electric equipment, and the penetrating part penetrates through the cover plate piece and is connected with the pin, so that electric connection between the inside and the outside of the battery is realized, and the electric performance of the battery is realized. The pole piece in the battery cover plate is simple in structure, the use amount of raw materials can be saved while the power supply requirement of the battery is met, the processing technology can be simplified, and the processing cost can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery cover plate and single cell. BACKGROUND

[0002] With the development of modern society and the enhancement of people's environmental protection consciousness, more and more equipment selects battery as power supply, such as mobile phone, notebook computer, electric tool and electric automobile etc., which provides broad space for the application and development of battery. In the battery, the pole is the component that connects the inside and outside of the battery, one end of the pole is connected with the external circuit of the battery, and the other end is connected with the battery cell through the pin, so as to realize the function of charging and discharging. Usually, the battery cover plate pole terminal is cylindrical, which is machined from copper bar or aluminum plate, and the volume is large, the forming processing is difficult, and the manufacturing cost is high.

[0003] Therefore, a battery cover plate and single cell are needed to solve the above problems. INVENTION CONTENTS

[0004] One purpose of the utility model is to provide a battery cover plate, which can simplify the pole structure, reduce the processing difficulty and save the production cost.

[0005] To achieve this purpose, the utility model adopts the following technical scheme:

[0006] A battery cover plate is provided, which comprises:

[0007] A pole piece comprises an abutting portion and a penetrating portion, and the penetrating portion is connected to one end of the abutting portion at an angle;

[0008] A cover plate piece, the penetrating portion penetrates the cover plate piece, and the abutting portion abuts the cover plate piece;

[0009] A pin, the pin is located on both sides of the thickness direction of the cover plate piece respectively, and the pin is connected to the penetrating portion.

[0010] As an optional scheme of the battery cover plate, the penetrating portion and the pin are riveted.

[0011] As an optional scheme of the battery cover plate, the battery cover plate further comprises a sealing piece, and the sealing piece is arranged between the penetrating portion and the cover plate piece.

[0012] As an optional scheme of the battery cover plate, the sealing piece is made of polytetrafluoroethylene material.

[0013] As an optional scheme of the battery cover plate, the battery cover plate further comprises an upper insulating piece, the upper insulating piece is arranged between the abutting portion and the cover plate piece, and the penetrating portion penetrates the upper insulating piece.

[0014] As an optional solution of the battery cover plate, the battery cover plate further comprises a lower insulating piece abutting against one side of the cover plate piece away from the abutting portion, and the penetrating portion penetrates the lower insulating piece.

[0015] As an optional solution of the battery cover plate, the cover plate piece is provided with a first liquid injection hole, and the lower insulating piece is provided with a second liquid injection hole, and the first liquid injection hole and the second liquid injection hole are in corresponding communication.

[0016] As an optional solution of the battery cover plate, the battery cover plate further comprises an explosion-proof structure, the cover plate piece is provided with a first explosion-proof hole, the lower insulating piece is provided with a second explosion-proof hole, the first explosion-proof hole and the second explosion-proof hole are in corresponding communication, and the explosion-proof structure covers the first explosion-proof hole and is connected to the cover plate piece.

[0017] As an optional solution of the battery cover plate, the explosion-proof structure comprises an explosion-proof valve and a protective sheet, the explosion-proof valve covers the first explosion-proof hole and is connected to the cover plate piece, and the protective sheet covers and is connected above the explosion-proof valve.

[0018] Another purpose of the utility model is to provide a single battery which is simple in structure and can reduce production cost.

[0019] To achieve the purpose, the utility model adopts the following technical scheme.

[0020] The utility model provides a single battery which comprises a battery cover plate, a shell and a battery core, the battery core is arranged in the shell and is electrically connected with the pin, and the battery cover plate is closed and connected with the shell.

[0021] The utility model has the advantages of:

[0022] The utility model provides a battery cover plate, pole piece includes abutting portion and penetrating portion, pole piece can pass through stamping and bending, make abutting portion and penetrating portion present angle connection, pole piece constitutes L type structure, abutting portion abuts in the top of cover plate piece, be used for with external electric equipment electric connection, penetrating portion penetrates in cover plate piece and is connected with pin, thereby realize the electric connection of inside and outside of battery, guarantee that battery has good charge and discharge performance. The pole piece structure of the battery cover plate is simple, can save the use amount of raw materials while meeting the power supply demand of battery, and can simplify the processing technology and reduce the processing cost. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 It is the explosion view of the battery cover plate provided by the utility model;

[0024] Fig. 2 It is the partial sectional view of the battery cover plate provided by the utility model.

[0025] Fig.:

[0026] 100, pole piece; 110, abutting portion; 120, penetrating portion;

[0027] 200, cover plate; 210, first liquid injection hole; 220, first explosion-proof hole;

[0028] 300, pin; 310, conductive piece; 320, rivet;

[0029] 400, sealing piece;

[0030] 500, upper insulating piece;

[0031] 600, lower insulating piece; 610, second liquid injection hole; 620, second explosion-proof hole;

[0032] 700, explosion-proof structure; 710, explosion-proof valve; 720, protective sheet. DETAILED DESCRIPTION

[0033] The utility model will be described in further detail below in combination with the drawings and examples. It can be understood that the specific examples described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0034] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0035] In the utility model, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0036] In the description of the present embodiment, the terms "upper", "lower", "right", and the like, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in the description, and have no special meaning.

[0037] As shown in Figs. 1-2 The battery cover plate of the present embodiment includes a pole piece 100, a cover piece 200, and a pin 300. The pole piece 100 includes an abutting portion 110 and a penetrating portion 120, and the penetrating portion 120 is connected at an angle to one end of the abutting portion 110. The penetrating portion 120 penetrates the cover piece 200, and the abutting portion 110 abuts the cover piece 200. The pin 300 is located on both sides of the abutting portion 110 in the thickness direction of the cover piece 200, and the pin 300 is connected to the penetrating portion 120.

[0038] Based on the above design, the pole piece 100 in the battery cover plate includes an abutting portion 110 and a penetrating portion 120. The pole piece 100 can be bent by stamping, so that the abutting portion 110 and the penetrating portion 120 are connected at an angle. The pole piece 100 forms an L-shaped structure, the abutting portion 110 abuts above the cover piece 200, and is used for electrical connection with external electrical equipment. The penetrating portion 120 penetrates the cover piece 200 and is connected to the pin 300, thereby realizing electrical connection inside and outside the battery, and ensuring good charge and discharge performance of the battery. The pole piece 100 in the battery cover plate has a simple structure, which can not only meet the power supply demand of the battery, but also save the amount of raw materials used, simplify the processing technology, and reduce the processing cost.

[0039] In some embodiments, the penetrating portion 120 and the pin 300 are connected by welding. In the present embodiment, the penetrating portion 120 and the pin 300 are connected by riveting, which has a simple connection structure. It can not only be suitable for pole pieces 100 and pins 300 of different designs, different process shapes, and is conducive to the structure advantages of the pin 300 and the pole piece 100, improving the degree of personalized customization, but also can eliminate the process defects caused by the welding connection of the pin 300 and the pole piece 100, ensure the connection strength and conductivity between the pin 300 and the pole piece 100, and improve the product quality.

[0040] Specifically, the pin 300 comprises the conductive piece 310 and the rivet 320 riveted to the conductive piece 310 and the penetrating portion 120. In this way, the structure of the pin 300 and the pole piece 100 can be simplified, the pin 300 and the pole piece 100 are both formed by bending the conductive plate, which is conducive to reducing the material use of the pin 300 and the pole piece 100, saving production cost, and the bending forming process is simple, further reducing the production difficulty and improving the production efficiency.

[0041] Further, the battery cover plate further comprises a sealing member 400 arranged between the penetrating portion 120 and the cover piece 200, which ensures the insulation and sealing between the pole piece 100 and the cover piece 200, prevents the pole piece 100 and the cover piece 200 from conducting electricity to cause the battery short circuit, and ensures the sealing of the battery interior.

[0042] Generally, the sealing member 400 can use a sealing ring of fluororubber material. However, since the battery releases heat to generate high temperature during charging and discharging, the sealing ring of fluororubber material releases rebound force due to heat, causing the pole position to move, reducing the compression amount of the sealing ring, affecting the air tightness of the battery, and existing safety hazards. Therefore, in the embodiment, the sealing member 400 is arranged as a polytetrafluoroethylene (PFA) material injection molding part. The PFA material has good high temperature resistance and can ensure good anti-deformation ability under high temperature baking, ensuring that the sealing member 400 is tightly compressed between the pole piece 100 and the cover piece 200, thereby ensuring the sealing of the battery and improving the safety of the battery.

[0043] Further, the battery cover plate further comprises an upper insulation member 500 arranged between the abutting portion 110 and the cover piece 200, and the penetrating portion 120 penetrates the upper insulation member 500. In the embodiment, the upper insulation member 500 covers the four sides and the lower surface of the abutting portion 110, ensuring the insulation between the abutting portion 110 and the cover piece 200.

[0044] Optionally, the cover piece 200 can be provided with a limiting groove (not shown in the figure), and the limiting groove is arranged on the upper surface of the cover piece 200. The upper insulation member 500 can be limited in the limiting groove, thereby facilitating the positioning of the upper insulation member 500 and the abutting portion 110, avoiding the movement of the upper insulation member 500 on the cover piece 200, facilitating the positioning assembly, and being conducive to improving the assembly work efficiency.

[0045] Further, the battery cover plate further comprises a lower insulation member 600 abutting to the side of the cover piece 200 away from the abutting portion 110, and the penetrating portion 120 penetrates the lower insulation member 600, ensuring the insulation between the battery interior and the cover piece 200.

[0046] In the embodiment, the cover plate 200 is provided with a first liquid injection hole 210, the lower insulating member 600 is provided with a second liquid injection hole 610, the first liquid injection hole 210 and the second liquid injection hole 610 are in communication, and electrolyte can be added to the inside of the battery through the first liquid injection hole 210 and the second liquid injection hole 610, the liquid level of the electrolyte is controlled, and the normal operation of the battery is ensured.

[0047] Further, the battery cover further comprises an explosion-proof structure 700, the cover plate 200 is provided with a first explosion-proof hole 220, the lower insulating member 600 is provided with a second explosion-proof hole 620, the first explosion-proof hole 220 and the second explosion-proof hole 620 are correspondingly arranged, and the explosion-proof structure 700 covers the first explosion-proof hole 220 and is connected to the cover plate 200. When the internal pressure of the battery is too large, high-pressure gas flows to the first explosion-proof hole 220 and the second explosion-proof hole 620, and the explosion-proof structure 700 can be broken under the action of the high-pressure gas, so that the high-pressure gas is released, the exhaust of the inside of the battery is realized, and the safety of the battery structure is ensured.

[0048] Specifically, the explosion-proof structure 700 comprises an explosion-proof valve 710 and a protective sheet 720, the explosion-proof valve 710 covers the first explosion-proof hole 220 and is connected to the cover plate 200, the explosion-proof valve 710 is provided with a notch, the thickness of the notch is small, and the notch can be broken under the action of the high-pressure gas, so that the high-pressure gas is released. The protective sheet 720 covers and is connected above the explosion-proof valve 710, prevents foreign matters from knocking and scratching the explosion-proof valve 710 during the assembly or use of the battery cover, and ensures that the explosion-proof valve 710 is in good condition.

[0049] The embodiment further provides a single battery, which comprises a battery cell, a shell and the above-mentioned battery cover, the battery cell is arranged in the shell, the safety of the battery cell is protected, the battery cell is electrically connected with the pin 300, and the battery cell is electrically connected with an external power consumption device through the pin 300 and the pole sheet 100, and the battery cover is closed and connected with the shell, so that the sealing performance of the inside of the single battery is ensured. The single battery has simple structure, low manufacturing difficulty, can save the use of raw materials, and reduces the processing and production cost.

[0050] Obviously, the above-mentioned embodiments of the utility model are only examples for clearly explaining the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, other different forms of changes or changes can be made on the basis of the above-mentioned description. Here, all the embodiments are not enumerated. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A battery cover, characterized in that, include: The electrode post (100) includes an abutting portion (110) and a through portion (120), wherein the through portion (120) is angularly connected to one end of the abutting portion (110); Cover plate (200), the through part (120) passes through the cover plate (200), and the abutting part (110) abuts against the cover plate (200); Pin (300), the pin (300) and the abutment portion (110) are respectively located on both sides of the cover plate (200) in the thickness direction, and the pin (300) is connected to the through portion (120).

2. The battery cover according to claim 1, characterized in that, The through part (120) is riveted to the pin (300).

3. The battery cover according to claim 1, characterized in that, The battery cover also includes a sealing element (400), which is disposed between the through portion (120) and the cover plate (200).

4. The battery cover according to claim 3, characterized in that, The sealing element (400) is made of polytetrafluoroethylene.

5. The battery cover according to claim 1, characterized in that, The battery cover also includes an upper insulating member (500), which is disposed between the abutting portion (110) and the cover plate (200), and the through portion (120) passes through the upper insulating member (500).

6. The battery cover according to claim 1, characterized in that, The battery cover also includes a lower insulating member (600), which abuts against the side of the cover plate (200) opposite to the abutting portion (110), and the through portion (120) passes through the lower insulating member (600).

7. The battery cover according to claim 6, characterized in that, The cover plate (200) is provided with a first liquid injection hole (210), and the lower insulating member (600) is provided with a second liquid injection hole (610). The first liquid injection hole (210) and the second liquid injection hole (610) are connected to each other.

8. The battery cover according to claim 6, characterized in that, The battery cover also includes an explosion-proof structure (700). The cover plate (200) is provided with a first explosion-proof hole (220), and the lower insulating member (600) is provided with a second explosion-proof hole (620). The first explosion-proof hole (220) and the second explosion-proof hole (620) are correspondingly connected. The explosion-proof structure (700) covers the first explosion-proof hole (220) and is connected to the cover plate (200).

9. The battery cover according to claim 8, characterized in that, The explosion-proof structure (700) includes an explosion-proof valve (710) and a protective plate (720). The explosion-proof valve (710) covers the first explosion-proof hole (220) and is connected to the cover plate (200). The protective plate (720) covers and is connected above the explosion-proof valve (710).

10. A single-cell battery, characterized in that, The battery includes a battery cell, a housing, and a battery cover as described in any one of claims 1-9, wherein the battery cell is disposed within the housing and electrically connected to the pin (300), and the battery cover is closedly connected to the housing.

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