A battery cover plate with a simple structure

Abstract

The utility model relates to battery structure technical field, and disclose a kind of minimalist structure battery cover, including top cover piece, the top end side of top cover piece is equipped with first negative pole through-hole, the top end other side of top cover piece is stretched with positive pole post, the bottom end of top cover piece is ultrasonically welded with lower plastic sheet, the top end of first negative pole through-hole is provided with negative pole upper plastic sheet, the inner chamber of first negative pole through-hole is provided with negative pole post, the top end side of lower plastic sheet is equipped with second negative pole through-hole, lower plastic sheet is integrally injection molded structure, the utility model passes through using stamping stretch integrated positive pole post, reduces pole seal ring and other spare parts, saves a lot of material cost, negative pole uses injection molding process, lower plastic sheet is integrally injection molded structure, so that product size is accurate, reduce spare part while reducing assembly step, and effectively reduce production cost, simultaneously using ultrasonic welding process effectively guarantees the firmness of lower plastic sheet fixation.

Description

Technical Field

[0001] This utility model relates to the field of battery structure technology, and more specifically to a battery cover plate with a minimalist structure. Background Technology

[0002] New energy battery covers are used to cover new energy batteries, protecting the internal structure from the external environment and impacts. They are core components ensuring lithium battery safety, playing a supporting, protective, and energy-transfer role. Their sealing performance directly affects battery safety and lifespan. With the rapid popularization of electric vehicles and consumer electronics, the requirements for battery performance are becoming increasingly stringent. Battery stability and safety have become a focus for automakers and consumers, prompting companies to develop battery covers that improve sealing and assembly efficiency.

[0003] However, traditional battery cover panels have numerous components and complex structures, resulting in complex production processes, high manufacturing costs, and limited product performance. During the production process, each component needs to be individually processed and manufactured, which greatly reduces the production efficiency and assembly accuracy of the product. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a battery cover with a minimal structure to solve the problems existing in the background art.

[0005] This utility model provides the following technical solution: a battery cover plate with a minimal structure, including a top cover sheet, wherein a first negative electrode through hole is provided on one side of the top end of the top cover sheet, characterized in that: a positive electrode post is stretched on the other side of the top end of the top cover sheet, a lower plastic sheet is ultrasonically welded to the bottom end of the top cover sheet, an upper negative electrode plastic sheet is provided at the top end of the first negative electrode through hole, a negative electrode post is provided in the inner cavity of the first negative electrode through hole, a second negative electrode through hole is provided on one side of the top end of the lower plastic sheet, and the lower plastic sheet is an integral injection molded structure.

[0006] Preferably, a sealing ring is provided at the bottom end of the second negative electrode through hole, and the top end of the negative electrode post passes through the sealing ring, the second negative electrode through hole, the first negative electrode through hole and the middle inner cavity of the upper plastic sheet of the negative electrode in sequence. The sealing ring is located between the negative electrode post and the lower plastic sheet.

[0007] Preferably, a first explosion-proof hole is provided in the middle of the top cover sheet, and a second explosion-proof hole is provided in the middle of the lower plastic sheet. The first explosion-proof hole and the second explosion-proof hole are in corresponding positions and connected. An explosion-proof sheet is provided between the first explosion-proof hole and the second explosion-proof hole, and an explosion-proof sheet protective film is provided at the top of the first explosion-proof hole.

[0008] Preferably, a positive electrode through hole is provided on the other side of the top of the lower plastic sheet, and the position of the positive electrode post corresponds to the position of the positive electrode through hole.

[0009] Preferably, two blind holes are provided on the bottom end of the top cover sheet near the positive electrode post, and two connecting posts are fixedly connected to the top end of the lower plastic sheet near the positive electrode through hole. The connecting posts correspond to the blind holes and are connected to their inner cavities.

[0010] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model adopts a positive electrode stretching + negative electrode injection molding process. The positive electrode is formed by stamping and stretching in one piece, which reduces the number of parts such as the electrode seal ring, saving a lot of material costs. While reducing the number of parts, it also reduces the number of assembly steps. The negative electrode adopts an injection molding process, and the lower plastic sheet is an integral injection molding structure, which makes the product dimension accurate and the surface quality better. It can effectively ensure the airtightness of the product and effectively reduce the production cost.

[0011] 2. This utility model, by providing blind holes and connecting posts, makes the assembly position of the top cover and the lower plastic sheet more accurate, facilitates assembly, and effectively improves the assembly efficiency and accuracy of the assembly position. At the same time, the use of ultrasonic welding process ensures that the top cover and the lower plastic sheet are fixedly connected together, effectively guaranteeing the firmness of the lower plastic sheet. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall exploded structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 3 This is a schematic diagram of the overall cross-sectional structure of this utility model.

[0015] The attached diagram is labeled as follows: 1. Top cover plate; 2. First negative electrode through hole; 3. Positive electrode post; 4. Lower plastic sheet; 5. Upper negative electrode plastic sheet; 6. Negative electrode post; 7. Second negative electrode through hole; 8. Sealing ring; 9. First explosion-proof hole; 10. Second explosion-proof hole; 11. Explosion-proof sheet; 12. Explosion-proof sheet protective film; 13. Positive electrode through hole; 14. Blind hole; 15. Connecting post. Detailed Implementation

[0016] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The simplified battery cover plate involved in this utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0017] This utility model provides a battery cover with a very simple structure. Figure 1 - Figure 3 As shown, the product includes a top cover plate 1, a first negative electrode through hole 2 on one side of the top of the top cover plate 1, a positive electrode post 3 stretched on the other side of the top of the top of the top cover plate 1, a lower plastic sheet 4 ultrasonically welded to the bottom of the top cover plate 1, an upper negative electrode plastic sheet 5 disposed at the top of the first negative electrode through hole 2, a negative electrode post 6 disposed in the inner cavity of the first negative electrode through hole 2, a second negative electrode through hole 7 disposed on one side of the top of the lower plastic sheet 4, the lower plastic sheet 4 is an integral injection molded structure, and the positive electrode post 3 is a stamped and stretched integral molded structure, so that this product adopts a positive electrode stretching + negative electrode injection molding process, which reduces the number of parts and assembly steps, and effectively reduces production costs.

[0018] Furthermore, such as Figure 1 and Figure 2 As shown, a sealing ring 8 is provided at the bottom of the second negative electrode through hole 7. The top of the negative electrode post 6 passes through the sealing ring 8, the second negative electrode through hole 7, the first negative electrode through hole 2, and the middle inner cavity of the upper plastic sheet 5 of the negative electrode in sequence. The sealing ring 8 is located between the negative electrode post 6 and the lower plastic sheet 4. After the negative electrode post 6 is assembled into the inner cavity of the first negative electrode through hole 2, it is injection molded to form the upper plastic sheet 5 of the negative electrode. The negative electrode adopts the injection molding process with precise dimensions and good surface quality, which can effectively ensure the airtightness of the product, and at the same time effectively improve the production efficiency and the strength of the upper plastic sheet 5 of the negative electrode.

[0019] Furthermore, such as Figure 1 As shown, a first explosion-proof hole 9 is provided in the middle of the top cover 1, and a second explosion-proof hole 10 is provided in the middle of the lower plastic sheet 4. The first explosion-proof hole 9 and the second explosion-proof hole 10 are positioned correspondingly and connected. An explosion-proof sheet 11 is provided between the first explosion-proof hole 9 and the second explosion-proof hole 10. An explosion-proof sheet protective film 12 is provided at the top of the first explosion-proof hole 9. When the internal pressure of the battery rises abnormally, the first explosion-proof hole 9 and the second explosion-proof hole 10 serve as pressure release channels to prevent the battery from exploding. The explosion-proof sheet 11 serves as a direct protective layer, controlling the timing and method of pressure release to prevent accidental triggering or external interference. At the same time, the explosion-proof sheet protective film 12 is added to protect the explosion-proof sheet 11 from external physical damage such as collision, scratches or chemical corrosion, ensuring its functional integrity.

[0020] Furthermore, such as Figure 1 As shown, a positive electrode through hole 13 is provided on the other side of the top of the lower plastic sheet 4. The positive electrode post 3 is positioned corresponding to the positive electrode through hole 13. The positive electrode post 3 adopts a stretching structure, which reduces the number of parts such as the electrode sealing structure and saves a lot of material costs.

[0021] Furthermore, such as Figure 1 and Figure 3As shown, two blind holes 14 are opened on the bottom end of the top cover plate 1 near the positive electrode post 3. Two connecting posts 15 are fixedly connected to the top end of the lower plastic sheet 4 near the positive electrode through hole 13. The connecting posts 15 correspond to the blind holes 14 and are connected to their inner cavities. The blind holes 14 and connecting posts 15 make the assembly positions of the top cover plate 1 and the lower plastic sheet 4 match, which facilitates assembly and effectively improves assembly efficiency and the accuracy of assembly position. At the same time, the ultrasonic welding process is adopted to effectively ensure the firmness of the lower plastic sheet 4.

[0022] The working principle of this utility model is as follows: First, the lower plastic sheet 4 is manufactured using an integrated injection molding process. During the production of the top cover sheet 1, the top end is stamped and stretched to form an integrated positive electrode post 3. Then, the top end of the negative electrode post 6 is sequentially inserted through the sealing ring 8, the second negative electrode through hole 7, the first negative electrode through hole 2, and the middle inner cavity of the upper negative plastic sheet 5. After assembling the negative electrode post 6, injection molding is performed to form the upper negative plastic sheet 5. This effectively improves production efficiency and the strength of the upper negative plastic sheet 5. When assembling the top cover sheet 1 and the lower plastic sheet 4, the assembly position is determined by the blind hole 14 and the connecting post 15, which facilitates assembly and effectively improves assembly efficiency and the accuracy of the assembly position between the top cover sheet 1 and the lower plastic sheet 4. At the same time, ultrasonic welding is used to fix the lower plastic sheet 4. At the bottom of the top cover 1, the lower plastic sheet 4 is securely fixed. The positive electrode post 3 adopts a tension structure, which reduces the number of parts such as the electrode post sealing structure and saves a lot of material costs. The negative electrode adopts the injection molding process with precise dimensions and good surface quality, which can effectively ensure the airtightness of the product. At the same time, it effectively improves production efficiency and the strength of the plastic sheet 5 on the negative electrode. During the use of the product, the first explosion-proof hole 9 and the second explosion-proof hole 10 serve as pressure release channels to prevent the battery from exploding. The explosion-proof sheet 11 serves as a direct protective layer, controlling the timing and method of pressure release to prevent accidental triggering or external interference. At the same time, an explosion-proof sheet protective film 12 is added to protect the explosion-proof sheet 11 from external physical damage such as collision, scratches or chemical corrosion, ensuring its functional integrity.

[0023] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other. In conclusion, the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A battery cover with a minimalist structure, comprising a top cover (1), wherein a first negative electrode through hole (2) is provided on one side of the top end of the top cover (1), characterized in that: A positive electrode post (3) is stretched on the other side of the top of the top cover plate (1). A lower plastic sheet (4) is ultrasonically welded to the bottom of the top cover plate (1). A negative upper plastic sheet (5) is provided at the top of the first negative electrode through hole (2). A negative electrode post (6) is provided in the inner cavity of the first negative electrode through hole (2). A second negative electrode through hole (7) is opened on one side of the top of the lower plastic sheet (4). The lower plastic sheet (4) is an integral injection molded structure.

2. The simplified battery cover plate according to claim 1, characterized in that: A sealing ring (8) is provided at the bottom end of the second negative electrode through hole (7). The top end of the negative electrode post (6) passes through the sealing ring (8), the second negative electrode through hole (7), the first negative electrode through hole (2), and the middle inner cavity of the upper plastic sheet (5) of the negative electrode in sequence. The sealing ring (8) is located between the negative electrode post (6) and the lower plastic sheet (4).

3. The battery cover plate with a minimalist structure according to claim 1, characterized in that: The top cover (1) has a first explosion-proof hole (9) in the middle and the lower plastic sheet (4) has a second explosion-proof hole (10) in the middle. The first explosion-proof hole (9) and the second explosion-proof hole (10) are in corresponding positions and connected. An explosion-proof sheet (11) is provided between the first explosion-proof hole (9) and the second explosion-proof hole (10). An explosion-proof sheet protective film (12) is provided at the top of the first explosion-proof hole (9).

4. The battery cover plate with a minimalist structure according to claim 1, characterized in that: A positive electrode through hole (13) is provided on the other side of the top of the lower plastic sheet (4), and the positive electrode post (3) is positioned corresponding to the positive electrode through hole (13).

5. A battery cover with a minimalist structure according to claim 4, characterized in that: Two blind holes (14) are opened on the bottom end of the top cover (1) near the positive electrode post (3). Two connecting posts (15) are fixedly connected on the top end of the lower plastic sheet (4) near the positive electrode through hole (13). The connecting posts (15) correspond to the blind holes (14) and are connected to their inner cavities.

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