Battery cover plate, single battery and electric equipment
The one-piece molded explosion-proof valve design solves the problems of high cost and insufficient safety caused by poor welding, and achieves a low-cost and high-reliability pressure relief effect for the battery cover, thereby improving the safety of new energy batteries.
Patent Information
- Application Number
- CN202422939059.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-11-29
AI Technical Summary
Poor welding of existing battery covers leads to high production costs and insufficient safety performance, making it difficult to meet the safety requirements of new energy vehicles.
The explosion-proof valve and cover plate are integrally molded. Through the design of annular grooves and protrusions, the explosion-proof valve can be fixed without welding and automatically relieves pressure when the pressure is too high, thereby improving safety and reliability.
It reduces production costs, improves the reliability and safety of the battery cover for explosion-proof pressure relief, simplifies the production process, and enhances the safety performance of individual batteries.
Smart Images
Figure CN223612517U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery technology field especially relates to a battery cover plate, single battery and electric equipment. BACKGROUND
[0002] New energy battery cover plate refers to the plate-shaped material used for covering new energy battery, and is usually used for wrapping and protecting battery cover plate. It can be used for various types of new energy batteries, including lithium battery, lithium cobalt oxide battery, nickel hydrogen battery, etc. New energy battery cover plate usually needs to have certain strength and wear resistance to protect the internal structure of the battery from the influence of external environment and collision. With the rapid development of new energy vehicles, new energy battery cover plate is also continuously improved and innovated to meet the changing needs.
[0003] With the increase of volume, the increase of energy, and the worsening of use environment, the risk of explosion caused by the damage of sealed battery is also increasing. In order to ensure the safety of battery use, a pressure relief structure needs to be set on the battery sealing shell or cover plate. The existing cover plate pressure relief structure is composed of a light cover plate and an explosion-proof sheet, and the explosion-proof sheet is welded on the pressure relief hole of the light cover plate. In the welding process, due to factors such as welding machine and power, virtual welding, pores and insufficient penetration, etc. are easily produced, which greatly affects the safety performance of the cover plate. This situation brings many difficulties to the detection personnel, and also needs to invest high-value equipment, which undoubtedly increases the production cost and is not conducive to market competition.
[0004] Therefore, it is urgent to provide a new type of battery cover plate, single battery and electric equipment, so as to solve the above technical problems in the prior art. UTILITY MODEL CONTENTS
[0005] One purpose of the utility model is to provide a battery cover plate, which can reduce the production cost of the battery cover plate and the single battery, and improve the reliability of explosion-proof pressure relief and the use safety of the battery cover plate.
[0006] To achieve this purpose, the utility model adopts the following technical solutions:
[0007] The battery cover plate comprises a cover plate body, the cover plate body is integrally formed with an explosion-proof valve, an annular groove is arranged at the connection between the explosion-proof valve and the cover plate body, a protruding portion is arranged on the top wall of the explosion-proof valve and is higher than the port of the annular groove, and a groove portion corresponding to the protruding portion is arranged at the bottom of the explosion-proof valve.
[0008] Optionally, the top wall of the cover plate body is provided with a groove connecting portion, and the annular groove is arranged in the groove connecting portion.
[0009] Optionally, the wall thickness of the protruding portion is not less than 0.8 mm.
[0010] Optionally, the vertical distance between the top wall of the protruding part and the top wall of the groove connecting part is not greater than 0.8 mm and not less than 0.5 mm.
[0011] Optionally, the annular groove is provided with a plurality of outwardly expanding sections from top to bottom, and the inner side wall of the upper outwardly expanding section is greater than the inner side wall of the lower outwardly expanding section.
[0012] Optionally, the outwardly expanding section is provided with two ends, the inner side wall of the upper outwardly expanding section is not greater than 140° and not less than 130°, and the inner side wall of the lower outwardly expanding section is not greater than 100° and not less than 90°.
[0013] Optionally, the explosion-proof valve is provided with a pressure relief notch.
[0014] Optionally, the cover plate body and the explosion-proof valve are integrally stamped and formed by aluminum profiles.
[0015] Another purpose of the utility model is to provide a single battery, which comprises the battery cover plate of any one of the above-mentioned schemes.
[0016] Another purpose of the utility model is to provide an electric device, which comprises the single battery of the above-mentioned scheme.
[0017] Beneficial effects:
[0018] The battery cover plate in the utility model integrally forms the explosion-proof valve on the cover plate body, does not need to fix the explosion-proof valve by welding, can prevent the explosion-proof valve from being damaged in the welding process, and also reduces the production cost; at the same time, the annular groove is arranged at the connecting position of the explosion-proof valve and the cover plate body, when the internal pressure of the single battery is too large, the annular groove can be damaged, the explosion-proof valve can be punched out, the explosion-proof pressure relief function is realized, the annular groove is arranged, in order to avoid untimely pressure relief, the explosion-proof valve is provided with the protruding part and the corresponding groove part, so that the pressure can be gathered in the groove part, the protruding part of the explosion-proof valve protrudes outward, the annular groove is torn, and the pressure relief is realized simply and conveniently, and the pressure relief effect is better. The battery cover plate can not only reduce the production cost of the single battery, but also improve the reliability of the explosion-proof pressure relief, and improve the use safety of the battery cover plate. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 is the isometric view of the battery cover plate provided by the embodiment of the utility model;
[0020] Figure 2 is the longitudinal sectional view of the battery cover plate at the explosion-proof valve provided by the embodiment of the utility model.
[0021] In the drawings:
[0022] 100, cover plate body; 110, annular groove; 111, outwardly expanded portion; 120, recess connecting portion; 200, explosion-proof valve; 210, protruding portion; 220, recessed portion. DETAILED DESCRIPTION
[0023] The utility model will be described in further detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model and are not a limitation of the utility model. In addition, it should be noted that only the parts related to the utility model are shown in the drawings for ease of description, not all the structures.
[0024] 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; it can be the internal communication of two elements or the interaction relationship between 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.
[0025] In the utility model, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to 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 "upper", "upper" and "upper" of the first feature to the second feature include 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 "below", "below" and "below" of the first feature to the second feature include 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.
[0026] In the description of the embodiment, the terms "upper", "lower", "right", etc. orientation or position relationship is based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the utility model. In addition, the terms "first", "second" are only used to distinguish in description, and have no special meaning.
[0027] Please refer to Figure 1 and Figure 2In the embodiment, the battery cover plate comprises a cover plate body 100, the cover plate body 100 is integrally formed with an explosion-proof valve 200, an annular groove 110 is arranged at the connection between the explosion-proof valve 200 and the cover plate body 100, a top wall of the explosion-proof valve 200 is higher than the port of the annular groove 110 and is provided with a protruding part 210, and a bottom of the explosion-proof valve 200 is provided with a recessed part 220 corresponding to the protruding part 210.
[0028] In the embodiment, the battery cover plate integrally forms the explosion-proof valve 200 on the cover plate body 100, does not need to use welding to fix the explosion-proof valve 200, can prevent the explosion-proof valve 200 from being damaged in the welding process, and reduces the production cost; meanwhile, the annular groove 110 is arranged at the connection between the explosion-proof valve 200 and the cover plate body 100, can break the annular groove 110 when the internal pressure of the single battery is too large, and can make the explosion-proof valve 200 burst out to realize the explosion-proof pressure relief function; the annular groove 110 is arranged, in order to avoid untimely pressure relief, the explosion-proof valve 200 is provided with the protruding part 210 and the corresponding recessed part 220, so that the pressure can be gathered in the recessed part 220, the protruding part 210 of the explosion-proof valve 200 protrudes outward, the annular groove 110 is torn, and the pressure relief is realized simply and conveniently, and the pressure relief effect is better. The battery cover plate can not only reduce the production cost of the single battery, but also improve the reliability of the explosion-proof pressure relief and the use safety of the battery cover plate.
[0029] Please continue to refer to Figure 2 A recessed connection part 120 is arranged at the top wall of the cover plate body 100, and the annular groove 110 is arranged at the recessed connection part 120. The arrangement of the recessed connection part 120 can further reduce the connection strength of the annular groove 110, so that the explosion-proof pressure relief function is more easily realized. Specifically, the top wall of the protruding part 210 is not higher than the top port of the recessed connection part 120, so that the protruding part 210 does not protrude from the top wall of the cover plate body 100, and the explosion-proof valve 200 is protected from damage caused by the collision of foreign matters.
[0030] In the embodiment, the wall thickness of the protruding part 210 is not less than 0.8 mm. If the wall thickness of the protruding part 210 is too small, for example, less than 0.8 mm, the mechanical strength of the explosion-proof valve 200 is too low, the explosion-proof valve 200 is easily torn in the stamping process, and the yield is low, which is not conducive to improving the production qualification rate.
[0031] Further, the vertical distance between the top wall of the protruding portion 210 and the top wall of the groove connecting portion 120 is not greater than 0.8 mm and not less than 0.5 mm. Such a setting can help the pressure to concentrate on the corresponding groove portion 220 when pressure relief, improving the anti-explosion pressure relief performance; if the vertical distance is less than 0.5 mm, the annular groove 110 will not tear when the air pressure reaches the preset value, so the preset pressure relief value cannot be achieved; in addition, if the vertical distance is greater than 0.8 mm, the production process requirements are higher when stamping, and the production difficulty is greater, which is easy to cause the annular groove 110 to tear during the production process, and the corresponding pressure relief pressure is also smaller, which is not conducive to improving the use reliability of the single battery.
[0032] Please continue to refer to Figure 2 The annular groove 110 is provided with a plurality of outwardly expanding portions 111 from top to bottom. The inner side wall included angle of the outwardly expanding portion 111 located above is greater than that of the outwardly expanding portion 111 located below. Through the setting of the plurality of outwardly expanding portions 111, and the inner side wall included angle of the outwardly expanding portion 111 located above is greater than that of the outwardly expanding portion 111 located below, which helps to reduce the connection strength at the annular groove 110, and will not cause the annular groove 110 to tear during stamping, which helps to improve the production quality.
[0033] In the embodiment, the outwardly expanding portion 111 is provided with two ends, the inner side wall included angle of the outwardly expanding portion 111 located above is not greater than 140° and not less than 130°, and the inner side wall included angle of the outwardly expanding portion 111 located below is not greater than 100° and not less than 90°. In the embodiment, the inner side wall included angle of the outwardly expanding portion 111 located above is 130°, and the inner side wall included angle of the outwardly expanding portion 111 located below is 90°, which can make the material subjected to extrusion quickly expand outward on both sides during stamping, reduce the production difficulty, help to improve the service life of the stamping die, and also improve the stability of the preset pressure value during anti-explosion pressure relief, further improving the use reliability of the battery cover plate.
[0034] Optionally, the anti-explosion valve 200 is provided with a pressure relief notch (not shown in the figure). That is, not only through the annular groove 110, but also through the pressure relief notch provided on the anti-explosion valve 200, the double pressure relief can be achieved, further improving the reliability of the pressure relief anti-explosion function, thereby improving the use safety of the single battery using the battery cover plate.
[0035] Specifically, the cover plate body 100 and the explosion-proof valve 200 are integrally stamped and formed by aluminum profiles. In this embodiment, the selected aluminum profiles are AL3003 or AL1060, or SPCC (general cold-rolled carbon steel sheet and steel) can also be used. These profiles can be suitable for stamping and forming, avoiding tearing during stamping, thereby improving the reliability and yield of the battery cover plate produced. The person skilled in the art can select the material and model of the battery cover plate according to the specific needs, which will not be repeated here.
[0036] The embodiment also provides a single battery, which comprises the battery cover plate according to any one of the above-mentioned solutions. The single battery can be a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid (or lead-acid) battery, a lithium-ion battery, a polymer lithium-ion battery, etc. The single battery can also be a lithium-ion primary battery, a lithium-sulfur battery, a sodium lithium-ion battery, or a sodium-ion battery, or a magnesium-ion battery, etc. The single battery has the beneficial effects of the battery cover plate according to any one of the above-mentioned solutions, which will not be repeated here.
[0037] Specifically, when the single battery uses the battery cover plate, the production cost of the battery cover plate can be reduced, and the explosion-proof valve 200 does not need to be fixed by welding, avoiding damage to the explosion-proof valve 200 during welding, improving the safety performance of the battery cover plate, improving the use reliability of the single battery, and also reducing the production cost and the complexity of the production process of the single battery, and improving the production efficiency.
[0038] The embodiment also provides an electric device, which comprises the single battery according to the above-mentioned solution. The electric device can be an electric bicycle, an electric vehicle, a hybrid vehicle, a ship, an energy storage device, etc., as long as it uses electric energy as the energy source, which will not be repeated here.
[0039] Obviously, the above-mentioned embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. For those skilled in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the scope of the present application. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent substitution and improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the claims of the present application.
Claims
1. A battery cover plate, characterized by The cover plate body (100) is integrally formed with an explosion-proof valve (200), an annular groove (110) is arranged at the connection between the cover plate body (100) and the explosion-proof valve (200), the top wall of the explosion-proof valve (200) is arranged higher than the port of the annular groove (110) and is formed with a protruding part (210), and the bottom of the explosion-proof valve (200) is arranged with a recessed part (220) corresponding to the protruding part (210).
2. The battery cover plate of claim 1, wherein, The top wall of the cover plate body (100) is arranged with a recessed connecting part (120), and the annular groove (110) is arranged in the recessed connecting part (120).
3. The battery cover plate of claim 2, wherein, The wall thickness of the protruding part (210) is not less than 0.8 mm.
4. The battery cover plate of claim 3, wherein, The vertical distance between the top wall of the protruding part (210) and the top wall of the recessed connecting part (120) is not greater than 0.8 mm and not less than 0.5 mm.
5. The battery cover plate of claim 1, wherein, The annular groove (110) is arranged with a plurality of outwardly expanding parts (111) from top to bottom, the inner side wall included angle of the outwardly expanding part (111) located at the upper side is greater than the inner side wall included angle of the outwardly expanding part (111) located at the lower side.
6. The battery cover plate of claim 5, wherein, The outwardly expanding part (111) is arranged with two ends, the inner side wall included angle of the outwardly expanding part (111) located at the upper side is not greater than 140° and not less than 130°, and the inner side wall included angle of the outwardly expanding part (111) located at the lower side is not greater than 100° and not less than 90°.
7. The battery cover plate of any one of claims 1-6, wherein, The explosion-proof valve (200) is arranged with a pressure relief notch.
8. The battery cover plate of any one of claims 1-6, wherein, The cover plate body (100) and the explosion-proof valve (200) are integrally punched and formed by aluminum profiles.
9. A single cell characterized by The battery cover plate comprises the battery cover plate according to any one of claims 1-8.
10. An electrical device, characterized by The single battery comprises the single battery according to claim 9.