Battery cover plate assembly and power battery

Abstract

The utility model discloses a kind of battery cover plate assembly and power battery, battery cover plate assembly includes cover plate body, pole assembly, explosion-proof valve and collection component, pole hole and explosion-proof hole are opened on cover plate body, pole assembly is matched with pole hole, explosion-proof valve is matched with explosion-proof hole, collection component includes anti-overflow cover, conveying pipe and collection bag, anti-overflow cover is covered in the upper side of explosion-proof valve, conveying pipe one end is communicated with anti-overflow cover, the other end of conveying pipe is communicated with collection bag, one-way valve is arranged on conveying pipe, one-way valve is used to block the backflow of collection in collection bag to conveying pipe, anti-overflow cover and explosion-proof valve single correspondence.This scheme is collected by collection component one to one leak of single battery, will not cause influence to other battery, so that entire battery pack needs not to be replaced, battery resource and cost are saved.

Description

Technical Field

[0001] This utility model belongs to the field of battery equipment technology, specifically relating to a battery cover assembly and a power battery. Background Technology

[0002] Electricity, as a clean energy source, is increasingly widely used. As a device that stores electricity, the safety of batteries is also crucial. Current technology generally relies on sealing rings to prevent electrolyte or other chemical substances from leaking from the battery, thus reducing environmental damage or safety hazards to equipment. They also prevent external moisture or dust from entering the battery, minimizing their impact. However, with only sealing rings, if any battery in the battery pack fails and leaks, the leaked material will affect the other batteries, requiring the entire battery pack to be replaced, wasting battery resources. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a battery cover assembly and a power battery, which solves the problem that in existing technologies, if a single battery pack is damaged and leaks, the entire battery needs to be replaced, resulting in wasted resources and increased economic costs.

[0004] According to one aspect of this application, a battery cover assembly is disclosed. The battery cover assembly includes a cover body, a terminal post assembly, an explosion-proof valve, and a collection assembly. The cover body has a terminal post hole and an explosion-proof hole. The terminal post assembly mates with the terminal post hole, and the explosion-proof valve mates with the explosion-proof hole. The collection assembly includes an overflow cover, a delivery pipe, and a collection bag. The overflow cover is positioned above the explosion-proof valve. One end of the delivery pipe is connected to the overflow cover, and the other end of the delivery pipe is connected to the collection bag. A one-way valve is provided on the delivery pipe to prevent the collected material in the collection bag from flowing back into the delivery pipe. The overflow cover corresponds to the explosion-proof valve in a single configuration.

[0005] In some embodiments, a support plate is formed between the explosion-proof hole and the cover plate. The support plate is used to support the explosion-proof valve. The support plate is nano-etched so that the explosion-proof valve is firmly fixed on the support plate after being integrally formed.

[0006] In some embodiments, the cover plate body is further provided with a pad and an insert. The pad extends from the bottom of the cover plate body to the pole hole. The edge of the pad is transitionally connected to the inner wall of the pole hole. An inner hole is formed on the pad and communicates with the pole hole. The pole assembly includes a sealing ring, a pole body, and an adhesive coating. The sealing ring is supported on the pad, the pole body is supported on the sealing ring, and the adhesive coating matches the pole body and the insert after the pole body is supported on the sealing ring.

[0007] In some embodiments, the overmolding is formed by injection molding the gap between the pole and the cover plate body based on injection molding material after the pole is supported on the sealing ring. After the overmolding is injection molded, the insert is embedded in the overmolding.

[0008] In some embodiments, the insert is formed by bending upward from the edge of the inner hole, and the sealing ring is provided with a clearance hole. After the sealing ring is fitted with the insert through the clearance hole, it is supported on the pad.

[0009] In some embodiments, the connector is configured as a Z-shaped structure.

[0010] In some embodiments, the insert is configured as an insert structure extending upward from the top surface of the cover body. The insert structure includes a first sidewall and a second sidewall. At least one set of slot assembly is provided on at least one sidewall of the first sidewall and the second sidewall. Each set of slot assembly includes an adjacent slot and a boss. At least one of the first sidewall, the second sidewall, the slot, and the boss is designed as a ramp.

[0011] In some embodiments, the overmolding includes at least two splicing portions, each splicing portion having a protruding locking platform. The pole body is provided with a locking groove corresponding to the locking platform. The locking platform includes opposing step planes, step slopes, and mating surfaces. The step plane is located below the step slope. One side of the mating surface is connected to the step plane, and the other side is connected to the step slope. The step slope is inclined towards the step plane from the mating surface.

[0012] In some embodiments, when the overlay and the pole body are installed together and there is a gap between the cover plate body and the overlay, the gap is filled with conductive adhesive, and the sealing ring is a circular or square structure design.

[0013] According to another aspect of this application, a power battery is also disclosed, the power battery including a battery cover assembly as described in any of the preceding claims.

[0014] This solution includes, but is not limited to, the following beneficial effects: (1) By extending an overflow shield from each battery cell and connecting it to a collection bag via a delivery pipe, the overflow shield, delivery pipe, and collection bag can work together to output the leaked material when any battery cell is damaged and leaks. This avoids the leakage from that battery cell affecting other battery cells while effectively collecting and treating the leaked material, thus reducing environmental pollution; (2) The one-way valve prevents the collected material in the collection bag from flowing back into the delivery pipe, further ensuring the cleanliness and safety of the equipment; (3) The presence of the support plate provides stable support for the explosion-proof valve, making the explosion-proof valve more stable during battery use, reducing safety issues caused by the movement of the explosion-proof valve, and the support plate is treated with nano-etching to make it more stable. The processed support plate has multiple small holes, which can facilitate the molding material of the explosion-proof valve to be fixed on the support plate by filling multiple small holes after the explosion-proof valve is integrally molded, further ensuring the positional stability of the explosion-proof valve and improving the overall safety of the equipment; (4) The design of the pad and sealing ring can provide stable support for the pole body, making the position of the pole body more stable during battery use, reducing safety problems caused by the position movement of the pole body, and improving the fixing effect of the overmolding on the pole body through the design of the insert; (5) The gap between the pole body and the cover plate body is filled by overmolding injection molding, which further enhances the sealing of the battery, prevents electrolyte leakage, and also enhances the stability of the pole body, reducing safety problems caused by the position movement of the pole body, and based on the injection molding material Injection molding technology can improve production efficiency, and the injection molding of the overmolded material can ensure the quality and consistency of the product, improve the reliability of the battery. The insertion of the insert into the overmolded material further improves the compactness of the installation between the various components of the terminal assembly, and also further improves the stability of the terminal body. In addition, the overmolded material usually has good elasticity, which can provide a certain buffering effect when the terminal is subjected to external impact or vibration, protect the internal components, and reduce mechanical damage. (6) The bending extension of the insert can avoid perpendicular contact with the overmolded material, so that there is a certain inclined contact angle between the insert and the overmolded material, which improves the matching stability between the insert and the overmolded material, and the clearance hole design facilitates the installation of the sealing ring. (7) The Z-shaped insert has better stability. , has strong resistance to bending and torsion, which can help resist various stresses that the battery may encounter during operation; (8) The design of the panel structure and the slot assembly can enhance the stability and stress resistance of the insert, and the slope design can further enhance the fit between the insert and the coating, and improve the matching stability of the panel structure and the coating; (9) By designing the coating splice part, the coating can be pre-formed, which is convenient for disassembly and assembly with the pole body, and improves the assembly efficiency of the entire battery cover; and the design of the stepped slope improves the tightness and stability of the fit between the pole body and the coating after installation; (10) The use of conductive adhesive can improve the conductivity of the battery and improve the performance of the battery, and the design of the sealing ring is diverse, which improves the structural diversity of the sealing ring. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0016] Figure 1 This is a schematic diagram of a battery cover assembly according to an embodiment of the present utility model;

[0017] Figure 2 yes Figure 1 A cross-sectional view of the battery cover assembly structure shown.

[0018] Figure 3 This is another structural schematic diagram of the battery cover assembly according to an embodiment of the present utility model;

[0019] Figure 4 yes Figure 3 A cross-sectional view of the battery cover assembly structure shown.

[0020] Figure 5 yes Figure 4 Enlarged view of point A in the middle;

[0021] Figure 6 This is an exploded view of the battery cover assembly structure shown in the figure;

[0022] Figure 7 This is a schematic diagram of the structure of the cover body in the battery cover assembly shown in the figure;

[0023] Figure 8 yes Figure 6 A cross-sectional view of the cover plate body shown;

[0024] Figure 9 This is another cross-sectional view of the battery cover assembly according to an embodiment of the present utility model;

[0025] Figure 10 yes Figure 9 Exploded view of the example battery cover assembly;

[0026] Figure 11 yes Figure 10 Enlarged view at point B;

[0027] Figure 12 This is another structural schematic diagram of the battery cover assembly according to an embodiment of the present utility model;

[0028] Figure 13 yes Figure 12 An exploded view of the battery cover assembly shown.

[0029] In the figure, 1-cover plate body, 11-pole post hole, 12-explosion-proof hole, 13-support plate, 14-pad plate, 15-embedded part, 151-first side wall, 152-second side wall, 153-slot assembly, 1531-slot, 1532-bore, 2-pole post assembly, 21-sealing ring, 211-avoidance hole, 22-rubber coating, 221-splitting part, 222-carding platform, 23-pole post body, 231-carding slot, 3-explosion-proof valve, 4-collection assembly, 41-overflow cover, 42-conveying pipe, 43-collection bag. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0031] Specifically, according to one aspect of this application, a battery cover assembly is disclosed. See also... Figures 1 to 12 As shown, the battery cover assembly includes a cover body 1, a terminal post assembly 2, an explosion-proof valve 3, and a collection assembly 4. The cover body 1 has a terminal post hole 11 and an explosion-proof hole 12. The terminal post assembly 2 mates with the terminal post hole 11, and the explosion-proof valve 3 mates with the explosion-proof hole 12. The collection assembly 4 includes an overflow cover 41, a delivery pipe 42, and a collection bag 43. The overflow cover 41 covers the explosion-proof valve 3. One end of the delivery pipe 42 is connected to the overflow cover 41, and the other end is connected to the collection bag 43. A one-way valve is provided on the delivery pipe 42 to prevent the collected material in the collection bag 43 from flowing back into the delivery pipe 42. The overflow cover 41 corresponds to the explosion-proof valve 3 in a single configuration. For example, as shown... Figure 1 As shown, a battery cover assembly serves as a battery unit in a battery pack. Multiple battery cover assemblies are assembled into a battery pack. Each battery cover has an overflow shield 41 covering its explosion-proof valve 3, and each overflow shield 41 is connected to a collection bag 43 via a corresponding delivery pipe 42. It is understood that the delivery pipe 42 may include branch pipes and a main pipe, and each overflow shield 41 is connected to the main pipe via a branch pipe. Preferably, the branch pipes and overflow shields 41, as well as the branch pipes and the main pipe, are detachably connected by threads.

[0032] Understandably, by extending an overflow shield 41 to each battery cell and connecting it to a collection bag 43 via a delivery pipe 42, when any battery cell is damaged and leaks, the overflow shield 41, delivery pipe 42, and collection bag 43 work together to output the leaked material. This prevents the leaked material from affecting other battery cells while effectively collecting and treating the leaked material, reducing environmental pollution. Furthermore, the one-way valve prevents the collected material in the collection bag 43 from flowing back into the delivery pipe 42, further ensuring the cleanliness and safety of the equipment.

[0033] Furthermore, a support plate 13 is formed between the explosion-proof hole 12 and the cover plate. The support plate 13 supports the explosion-proof valve 3. The support plate 13 is nano-etched to ensure that the explosion-proof valve 3 is firmly fixed to the support plate 13 after integral molding. It is understood that the presence of the support plate 13 provides stable support for the explosion-proof valve 3, making it more stable during battery use and reducing safety issues caused by displacement of the explosion-proof valve 3. The nano-etching treatment of the support plate 13 creates multiple small holes, allowing the molding material of the explosion-proof valve 3 to fill these holes and securely fix it to the support plate 13 after integral molding, further ensuring the positional stability of the explosion-proof valve 3 and improving the overall safety of the device. For example, the explosion-proof valve 3 is made of rubber or plastic.

[0034] For further information, please refer to [link / reference]. Figures 4 to 11 The cover plate body 1 is also provided with a pad 14 and an insert 15. The pad 14 extends from the bottom of the cover plate body 1 towards the terminal hole 11. The edge of the pad 14 transitions to the inner wall of the terminal hole 11. The pad 14 has an inner hole that communicates with the terminal hole 11. The terminal assembly 2 includes a sealing ring 21, a terminal body 23, and an adhesive coating 22. The sealing ring 21 is supported on the pad 14, and the terminal body 23 is supported on the sealing ring 21. After the terminal body 23 is supported on the sealing ring 21, the adhesive coating 22 matches the terminal body 23 and the insert 15. The design of the pad 14 and the sealing ring 21 can provide stable support for the terminal body 23, making the position of the terminal more stable during battery use and reducing safety issues caused by the movement of the terminal body. The design of the insert 15 improves the fixing effect of the adhesive coating 22 on the terminal body 23. The electrode assembly 22 consists of two sets, including a positive electrode assembly 2 and a negative electrode assembly 2. The positive electrode assembly 2 and the negative electrode assembly 2 are symmetrically arranged at both ends of the cover plate body 11. The positive electrode assembly 2 and the negative electrode assembly 2 have the same composition and structure. For example, since the two sets of electrode assemblies 22 (positive electrode assembly 2 and negative electrode assembly 2) have the same composition and structure, the electrode assembly 2 described in this solution is one of the electrode assemblies 21 that does not distinguish between positive and negative electrodes.

[0035] In one example, as shown in Figure 3 to... Figure 5 ,as well as Figures 9 to 10 As shown, the overmolded core 22 is formed by injection molding the filling of the gap between the terminal post 23 and the cover plate body 1 after the terminal post 23 is supported on the sealing ring 21. After the overmolded core 22 is injection molded, the insert 15 is embedded in the overmolded core 22. It can be understood that by filling the gap between the terminal post 23 and the cover plate body 1 with the overmolded core 22, the sealing performance of the battery is further enhanced, preventing electrolyte leakage. At the same time, the stability of the terminal post 23 is enhanced, reducing safety issues caused by the displacement of the terminal post 23. Moreover, the injection molding technology based on the injection molding material can improve production efficiency. At the same time, the injection-molded overmolded core 22 can ensure product quality and consistency, improving the reliability of the battery. The insert 15 embedded in the overmolded core 22 further improves the compactness of the installation between the components of the terminal post assembly 2, and also further improves the stability of the terminal post 23. Furthermore, the overmolded core 22 material usually has good elasticity, which can provide a certain buffering effect when the terminal post is subjected to external impact or vibration, protecting the internal components and reducing mechanical damage.

[0036] Furthermore, in one example, such as Figures 4 to 8 The insert 15 extends upward from the edge of the inner hole, and the sealing ring 21 is provided with a clearance hole 211. After the sealing ring 21 is fitted with the insert 15 through the clearance hole 211, it is supported on the pad 14. Preferably, the insert 15 is constructed as a Z-shaped structure, that is, it includes a first bent portion, a second bent portion and a third bent portion. The first bent portion extends from the pad 14 to a plane away from the pad 14, the second bent portion is bent at an angle to the first bent portion, and the third bent portion is bent towards the pole piece 23. By folding the insert 15 in a Z-shape, perpendicular contact with the overlay 22 can be avoided, resulting in a certain inclined contact angle between the insert 15 and the overlay 22. This improves the matching stability between the insert 15 and the overlay 22, and the design of the clearance hole 211 facilitates the installation of the sealing ring 21. Furthermore, the Z-shaped insert 15 has better stability and stronger resistance to bending and torsion, which can help resist various stresses that the battery may encounter during operation. The sealing ring 21 can be directly fitted onto the terminal post 23 as an accessory, or it can be directly injection molded into the sealing gap. Before injection molding, adhesive can be applied to the cover plate body 1 to improve the stability of the injection-molded sealing ring 21. For example, the adhesive can be applied by pad printing or brushing.

[0037] It is understood that the Z-shaped structure of the insert 15 is merely an illustrative example. In other feasible solutions, the insert 15 can also be an L-shaped structure with a non-perpendicular angle, that is, the horizontal and vertical parts of the L-shaped structure form an acute or obtuse angle. Furthermore, the insert 15 can also be configured as an S-shaped structure or other structures, as long as it can achieve a relatively stable embedding structure with the overmolded material 22 after injection molding, thereby reducing the likelihood of the overmolded material 22 detaching.

[0038] Furthermore, in yet another example, such as Figure 9 and Figure 10 As shown, the insert 15 can also be configured as a panel structure extending upward from the top surface of the cover plate body 1. The panel structure includes a first sidewall 151 and a second sidewall 152. At least one set of slot assembly 153 is provided on at least one sidewall of the first sidewall 151 and the second sidewall 152. Each set of slot assembly 153 includes an adjacent slot 1531 and a boss 1532. At least one of the first sidewall 151, the second sidewall 152, the slot 1531, and the boss 1532 is designed with a ramp. Exemplarily, the panel structure is a whole, which is a ring structure. In this case, there are multiple sets of slot assembly 153, which are arranged sequentially around the circumference of the ring structure. In another example, the insert 15 can also be configured as multiple fan-shaped structures around the pole hole 11, each fan-shaped structure being a panel structure. In this example, ramps are provided on the slot 1531 and the boss 1532. It is understandable that the design of the panel structure and the groove assembly 153 can enhance the stability and stress resistance of the insert 15, and the ramp design can further enhance the fit with the coating 22 and improve the matching stability of the panel structure and the coating 22.

[0039] Understandably, in the above structure, the direct cooperation between the insert 15 and the rubber coating 22 reduces the design of the cover ring structure, thereby reducing the stamping and welding processes of the cover ring and saving costs.

[0040] In yet another example, such as Figure 12 and Figure 13As shown, the coating 22 includes at least two splicing portions 221, with a mounting plate 222 protruding from each splicing portion 221. The pole piece 23 has a mounting groove 231 corresponding to the mounting plate 222. The mounting plate 222 includes opposing step planes, step slopes, and mating surfaces. The step plane is located below the step slope, and the mating surface connects to the step plane on one side and to the step slope on the other. The step slope and mating surface are inclined towards the step plane. Preferably, in this example, the coating 22 is formed by splicing two symmetrically arranged splicing portions 221. It is understood that in other feasible embodiments, the coating 22 may also include three, four, or other numbers of splicing portions 221. After the overlay 22 and the terminal post 23 are installed together, and there is a gap between the cover plate body 1 and the overlay 22, the gap is filled with conductive adhesive. By designing the splicing part 221 of the overlay 22, pre-forming of the overlay 22 can be achieved, facilitating disassembly and assembly with the terminal post 23 and improving the overall assembly efficiency of the battery cover. Furthermore, the stepped slope design improves the tightness and stability of the fit between the terminal post 23 and the overlay 22 after installation. The use of conductive adhesive also improves the battery's conductivity and performance.

[0041] Furthermore, such as Figure 13 As shown, the sealing ring 21 can be a square structure, and in another example, it can also be a circular structure. It is understood that the structure of the sealing ring 21 is not limited to the circular and square structures shown in the figure; it can also be a polygonal structure, etc. No specific limitations are made here. In this solution, the design of the sealing ring 21 is diverse, increasing the structural versatility of the sealing ring 21.

[0042] Furthermore, the battery cover assembly also includes a plastic component that is supported at the bottom of the cover body 1.

[0043] In some embodiments, the plastic part can be disposed around the electrode assembly 2, or integrally disposed around the electrode assembly 2 (positive electrode assembly 2 and negative electrode assembly 2) and the explosion-proof valve 3. The plastic part, the sealing ring 21, and the explosion-proof valve 3 can be integrally formed or disposed separately. Integrating the plastic part with the sealing ring 21 and the explosion-proof valve 3 can reduce processing steps, improve processing efficiency, and further reduce seams and potential leakage points during assembly, thereby improving the overall sealing effect and structural strength.

[0044] According to another aspect of this application, a power battery is also disclosed, the power battery including the battery cover assembly as described in any of the above.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A battery cover plate assembly, characterized by, The battery cover assembly includes a cover body (1), a terminal post assembly (2), an explosion-proof valve (3), and a collection assembly (4). The cover body (1) has a terminal post hole (11) and an explosion-proof hole (12). The terminal post assembly (2) is fitted with the terminal post hole (11), and the explosion-proof valve (3) is fitted with the explosion-proof hole (12). The collection assembly (4) includes an overflow cover (41), a conveying pipe (42), and a collection bag (43). The overflow cover (41) is placed above the explosion-proof valve (3). One end of the conveying pipe (42) is connected to the overflow cover (41), and the other end of the conveying pipe (42) is connected to the collection bag (43). A one-way valve is provided on the conveying pipe (42). The one-way valve is used to prevent the collected material in the collection bag (43) from flowing back into the conveying pipe (42). The overflow cover (41) corresponds to the explosion-proof valve (3) in a single configuration.

2. The battery cover plate assembly of claim 1, wherein, A support plate (13) is formed between the explosion-proof hole (12) and the cover plate. The support plate (13) is used to support the explosion-proof valve (3). The support plate (13) is nano-etched so that the explosion-proof valve (3) is integrally formed and stable on the support plate (13).

3. The battery cover plate assembly of claim 1, wherein, The cover plate body (1) is also provided with a pad (14) and an insert (15). The pad (14) extends from the bottom of the cover plate body (1) to the pole hole (11). The edge of the pad (14) is connected to the inner wall of the pole hole (11). The pad (14) has an inner hole that communicates with the pole hole (11). The pole assembly (2) includes a sealing ring (21), a pole body (23), and a rubber coating (22). The sealing ring (21) is supported on the pad (14). The pole body (23) is supported on the sealing ring (21). After the pole body (23) is supported on the sealing ring (21), the rubber coating (22) matches the pole body (23) and the insert (15).

4. The battery cover plate assembly of claim 3, wherein, The overmolded rubber (22) is formed by injection molding the gap between the pole piece (23) and the cover plate body (1) after the pole piece (23) is supported on the sealing ring (21). After the overmolded rubber (22) is injection molded, the insert (15) is embedded in the overmolded rubber (22).

5. The battery cover plate assembly of claim 4, wherein, The insert (15) is formed by bending upward from the edge of the inner hole. The sealing ring (21) is provided with a clearance hole (211). After the sealing ring (21) is fitted with the insert (15) through the clearance hole (211), it is supported on the pad (14).

6. The battery cover plate assembly of claim 5, wherein, The insert (15) is configured as a Z-shaped structure.

7. The battery cover plate assembly of claim 4, wherein, The insert (15) is configured as an insert structure extending upward from the top surface of the cover body (1). The insert structure includes a first sidewall (151) and a second sidewall (152). At least one set of slot assembly (153) is provided on at least one sidewall of the first sidewall (151) and the second sidewall (152). Each set of slot assembly (153) includes an adjacent slot (1531) and a boss (1532). At least one of the first sidewall (151), the second sidewall (152), the slot (1531) and the boss (1532) is a ramp design.

8. The battery cover plate assembly of claim 3, wherein, The overlay (22) includes at least two splicing parts (221), and a mounting plate (222) protrudes from the splicing part (221). The pole body (23) is provided with a mounting groove (231) corresponding to the mounting plate (222). The mounting plate (222) includes a step plane, a step slope and a mating surface. The step plane is located below the step slope. One side of the mating surface is connected to the step plane and the other side is connected to the step slope. The step slope is inclined towards the step plane from the mating surface.

9. The battery cover plate assembly of claim 8, wherein, After the coating (22) and the pole piece (23) are installed together and there is a gap between the cover plate body (1) and the coating (22), the gap is filled with conductive adhesive, and the sealing ring (21) is a circular structure design or a square structure design.

10. A power cell, characterized by The power battery includes the battery cover assembly as described in any one of claims 1 to 9.

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