Battery cover plate, battery monomer and battery pack

Abstract

The embodiment of the utility model discloses a battery cover plate, a battery monomer and a battery pack, and relates to the technical field of energy storage devices, the battery cover plate comprises a cover plate main body, a first insulating part and a sealing part, the cover plate main body is provided with a first through hole in a penetrating manner, and the cover plate main body is provided with a pressing surface at the periphery of an upper opening of the first through hole; the first insulating part is provided with a second through hole and a pressing structure, and at least part of the structure of the sealing part is pressed between the pressing surface and the pressing structure; in the technical scheme provided by the embodiment of the invention, the gap between the first insulating part and the cover plate main body is blocked by the sealing part, and even if the gap between the first insulating part and the cover plate main body is enlarged and the sealing part has good deformation capability, the gap can be blocked by the sealing part, so that a better sealing effect is achieved, and the service life of the cover plate is prolonged. The water sealing property of the battery cover plate is improved, and the sealing, waterproof and dustproof properties of the battery cover plate are improved.

Description

Technical Field

[0001] The embodiments in this application relate to the field of energy storage device technology, and in particular to a battery cover, a battery cell, and a battery pack. Background Technology

[0002] Currently, power batteries generally adopt a square hard-shell structure. The casing of a single battery includes a shell and a battery cover. The casing of a single battery provides a sealed space to accommodate the terminals and electrolyte. The terminals are led out of the sealed space through the first through hole of the cover body.

[0003] The battery's sealing ring is a key component ensuring battery safety and stability. It primarily prevents internal electrolyte leakage, gas spillage, and the intrusion of external impurities such as moisture and dust, thus guaranteeing the battery system's sealing and safety. The sealing ring is typically located between the terminal post and the cover plate body, with the top surface of the cover plate body having a first insulating component for mounting and supporting the terminal post.

[0004] However, as the battery life increases, the first insulating component ages and deforms, causing the gap between it and the cover plate to widen further, posing a risk of water ingress. Utility Model Content

[0005] Several embodiments in this application propose a battery cover, a battery cell, and a battery pack, aiming to provide a battery cover with better sealing performance.

[0006] One embodiment of this application provides a battery cover, the battery cover comprising:

[0007] The cover plate body has a first through hole through it, and the cover plate body has a pressing surface at the opening of the first through hole;

[0008] A first insulating element, wherein the first insulating element has a second through hole, and the first insulating element has a pressing structure; and

[0009] A seal, wherein at least a portion of the seal's structure is pressed between the pressing surface and the pressing structure.

[0010] In one embodiment, the battery cover further includes a terminal post, which includes a terminal post body and a terminal post plate body connected together. The terminal post is disposed through the first through hole and the second through hole. The terminal post plate body is disposed on the side of the cover body facing away from the first insulating member and abuts against a portion of the structure of the sealing member.

[0011] In one embodiment, the sealing element includes an annular sealing body and an annular abutment portion disposed on the annular sealing body. The annular sealing body is sleeved on the pole and located in the first through hole. The annular abutment portion abuts against the pressing surface and the abutment surface, respectively.

[0012] In one embodiment, the pressing structure has an abutment surface facing the pressing surface, and the annular abutment portion has two abutment walls that abut against the pressing surface and the abutment surface respectively, and the abutment walls are arranged parallel to the pressing surface and / or the abutment surface.

[0013] In one embodiment, the sealing element further includes an annular base plate, which is disposed on the side of the annular sealing body opposite to the annular abutment portion, and the annular base plate abuts against the side of the cover plate body opposite to the first insulating element.

[0014] In one embodiment, the annular abutment portion, the annular sealing body, and the annular base plate are all integrally formed structures.

[0015] In one embodiment, the annular abutment portion is provided with a first stop wall and a second stop wall facing the pressing surface and the abutment surface, respectively. The pressing surface forms a first annular groove, and the abutment surface forms a second annular groove. The first stop wall and the second stop wall are respectively disposed in the first annular groove and the second annular groove.

[0016] In one embodiment, the battery cover further includes a pressure block, the first insulating member has a mounting groove facing away from the cover body, the pressure block is disposed in the mounting groove and connected to the electrode body, and the second through hole is disposed in the bottom wall of the mounting groove.

[0017] One embodiment of this application also proposes a battery cell, the battery cell including a housing and a battery body disposed within the housing, the housing including the battery cover plate as described above.

[0018] One embodiment of this application also proposes a battery pack, the battery pack including a battery pack housing and at least one battery cell disposed within the battery pack housing as described above.

[0019] In several embodiments provided in this application, the upper edge of the first through hole on the cover plate body is configured as a pressing surface, and a corresponding abutment surface is provided on the side of the first insulating member facing the cover plate body. A portion of the sealing member is pressed between the pressing surface and the pressing structure, thereby forming a barrier and sealing between the first insulating member and the cover plate body. Specifically, the cover plate body has a first through hole, and the first insulating member has a second through hole. The electrode post passes through the first through hole and the second through hole in sequence. The two side walls of the sealing member are respectively sealed and abutted against the pressing surface and the pressing structure. In this way, even if the first insulating member ages and the gap between the first insulating member and the cover plate body widens as the service life increases, the sealing member, with its good deformation capability, can still ensure that the sealing member blocks the gap, thereby achieving a better sealing effect and improving the water sealing performance of the battery cover. Moreover, the sealing member located between the pressing surface and the pressing structure can also prevent the intrusion of impurities such as dust particles, further improving the safety of the battery. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments or prior art of this application, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of an embodiment of the battery cover provided in this application;

[0022] Figure 2 for Figure 1 Exploded view of the battery cover plate;

[0023] Figure 3 for Figure 1 Cross-sectional view of the battery cover;

[0024] Figure 4 for Figure 3 A magnified view of section A before assembly;

[0025] Figure 5 for Figure 3 A magnified view of the assembled section at point A;

[0026] Figure 6 This is a schematic diagram of the sealing element in the battery cover.

[0027] Figure 7 This is a cross-sectional view of the first embodiment of the seal;

[0028] Figure 8 This is a cross-sectional view of a second embodiment of the seal;

[0029] Figure 9 This is a cross-sectional view of the third embodiment of the seal.

[0030] Explanation of icon numbers:

[0031] 100. Battery cover plate; 1. Cover plate body; 11. First through hole; 111. Pressing surface; 12. Pressure relief valve; 121. Pressure relief cover plate body; 13. Liquid injection hole; 2. First insulating component; 21. Second through hole; 22. Mounting groove; 23. Pressing structure; 231. Abutting surface; 3. Terminal post; 31. Terminal post body; 32. Terminal post plate; 4. Sealing component; 41. Annular sealing body; 42. Annular abutting part; 421. First stop wall; 422. Second stop wall; 43. Annular base plate; 5. Pressing block. Detailed Implementation

[0032] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of several embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0033] It should be noted that if multiple embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0034] Furthermore, if multiple embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text implies three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0035] Currently, power batteries generally adopt a square hard-shell structure. The casing of a single battery cell includes a housing and a battery cover. The casing provides a sealed space to accommodate the terminals and electrolyte. The terminals extend from the sealed space to the outside through a first through-hole in the cover body, and a sealing ring is used between the terminals and the cover body to achieve a seal. However, as the battery's service life increases, the first insulating component ages and deforms, causing the gap between it and the cover body to widen further, posing a risk of water ingress. To address the above problems, this application proposes a battery cover.

[0036] For details, please refer to further information. Figures 1 to 9 The battery cover body 100 includes a cover body 1, a first insulating member 2, and a sealing member 4. The cover body 1 has a first through hole 11, and the cover body 1 has a pressing surface 111 at the opening of the first through hole 11. The first insulating member 2 has a second through hole 21 and a pressing structure 23. At least a portion of the sealing member 4 is pressed between the pressing surface 111 and the pressing structure 23.

[0037] The first insulating component 2 is typically used to isolate the electrode post 3 from the metal cover body 1, preventing short circuits and providing physical protection for the electrode post 3. The first insulating component 2 also supports the battery cell, preventing it from shaking internally and acting as a limiter. Given these points, the first insulating component 2 is usually made of plastic. However, with prolonged use, the first insulating component 2 is prone to aging and deformation. The main reason for this aging and deformation is the influence of external environmental factors such as light, temperature, and humidity during long-term use, leading to a gradual decline in material performance. These external factors cause the degradation of plastic molecular chains, reducing the number of carbon atoms and molecular weight, thus deteriorating the physical and chemical properties of the plastic, such as reduced strength, brittleness, and hardening. Furthermore, during processing, storage, and use, plastic parts are affected by external factors such as heat, oxygen, light, mechanical stress, ozone, harmful metal ions, and radiation, causing internal physical or chemical changes and deteriorating performance. The deformation of the first insulating element 2 progresses from the outer ring to the inner ring. Since the inner ring is not exposed to direct sunlight or oxidation, its deformation is smaller. In this technical solution, the sealing element 4 abuts against the pressing surface 111 of the cover plate body and the contact surface 231 located in the inner ring of the first insulating element 2. Since the deformation of the contact surface 231 is small, the sealing element 4 abuts against it reliably, and gaps are not easily generated between the two, thereby ensuring that the battery can maintain its sealing performance during long-term use.

[0038] In addition, the seal 4 has deformable properties and will deform due to compression, thus ensuring that the seal 4 always applies elastic pressure to the pressing surface 111 and the contact surface 231, thereby ensuring tight contact between the materials. Substances such as water vapor, rainwater, and particulate matter that can easily affect the battery's lifespan are difficult to break through the sealing barrier.

[0039] In the embodiments provided in this application, the upper edge of the first through hole 11 on the cover plate body 1 is configured as a pressing surface 111, and a corresponding abutment surface 231 is provided on the side of the first insulating member 2 facing the cover plate body 1. Parts of the structure of the sealing member 4 abut against the pressing surface 111 and the abutment surface 231 respectively, thereby forming a barrier and sealing between the first insulating member 2 and the cover plate body 1. Specifically, the cover plate body 1 is provided with a first through hole 11, the first insulating member 2 is provided with a second through hole 21, and the pole post 3 sequentially passes through the first through hole 11 and the second through hole 231. Through hole 21 protrudes, and sealing element 4 is sleeved on terminal post 3. The two side walls of sealing element 4 respectively seal and abut against pressing surface 111 and abutting surface 231. In this way, even if the first insulating element 2 ages and the gap between the first insulating element 2 and cover plate body 1 widens as the service life increases, the sealing element 4 has good deformation ability. Even if the gap between the first insulating element 2 and cover plate body 1 widens, the sealing element 4 can still block the gap, thereby achieving a better sealing effect and improving the water sealing performance of battery cover plate body 100. Moreover, the sealing element 4 located between the two abutting inclined surfaces can also prevent the intrusion of impurities such as dust particles, further improving the safety of the battery.

[0040] It is understood that the first insulating element 2 has a pressing structure 23 on the side facing the cover plate body; for details, please refer to further details. Figure 4 and Figure 5The pressing structure 23 is arranged around the second through hole 21 and located between the pole post 3 and the cover plate body. The abutment surface 231 is provided on the surface of the pressing structure 23 facing away from the second through hole 21. The pressing structure 23 protrudes from the lower surface of the first insulating member 2, so that when the first insulating member 2 and the cover plate body are assembled, the pressing structure 23 can penetrate into the first through hole 11 of the cover plate body. The first insulating member 2 forms a convex-concave fit with the cover plate body through the pressing structure 23, thereby forming a step at the position of the pressing surface 111 and the abutment surface 231. A sealing member 4 is provided at the step, so as to achieve a better water sealing effect. It should be noted that the pressing surface 111 and the abutting surface 231 can be arranged in parallel or at a certain angle. This application does not impose any restrictions on this. In one embodiment of this application, the pressing surface 111 and the abutting surface 231 are arranged in parallel. The parallel arrangement of the pressing surface 111 and the abutting surface 231 can ensure that the pressure of the two side walls of the sealing member 4 on the cover plate body and the first insulating member 2 is consistent, thereby ensuring the stability of the structure. In addition, the parallel arrangement of the pressing surface 111 and the abutting surface 231 is less likely to interfere during the assembly process, and the cover plate body and the first insulating member 2 can be assembled more easily.

[0041] It should be noted that this application does not limit the angle between the pressing surface 111, the contact surface 231, and the top surface of the cover body. In actual design and production, the angle between the pressing surface 111 and the top surface of the cover body, and the angle between the contact surface 231 and the top surface of the cover body, are between 30° and 60°, with 45° being the optimal conical slope. Furthermore, the pressing structure 23 can be integrally formed with the first insulating component 2, or it can be a separate structure. This application does not limit this. In one embodiment of this application, the pressing structure 23 and the first insulating component 2 are integrally formed. The first insulating component 2 is typically made of conductive PPS (polyphenylene sulfide), a polymer material with high melting point, heat resistance, thermal conductivity, and insulation. PPS material, after grafting modification with imide groups, can effectively improve heat resistance, ensuring good thermal conductivity and insulation even above 180°C, thus avoiding internal short-circuit safety issues in the battery. The first insulating component 2 is mainly processed by injection molding. The specific processing flow includes: first, inserting the positive / negative terminal post 3 through the sealing component 4 and the first through hole 11 of the cover plate body, and pressing it onto the cover plate body; then, injection molding the first insulating component 2 to fix the terminal post 3 onto the cover plate body, thus ensuring a more stable fit between the first insulating component 2 and the cover plate body. This improves the structural stability and electrical performance of the entire battery cover plate body 100 assembly.

[0042] In one embodiment of this application, the annular seal includes an annular sealing body 41 and an annular abutment portion 42 disposed on the annular sealing body 41. For details, please refer to further reading. Figure 6The annular sealing body 41 is fitted onto the electrode post 3 and abuts against the inner peripheral walls of the first through hole 11 of the electrode post 3 and the cover plate body, respectively. The annular abutment part 42 is provided on the upper surface of the annular sealing body 41. After the first insulating member 2 and the cover plate body are assembled, the annular abutment part 42 abuts against the pressing surface 111 of the cover plate body and the abutment surface 231 of the first insulating member 2, respectively. The annular abutment part 42 and the annular sealing body 41 together constitute a double sealing structure. When the first insulating member 2 ages and deforms, the annular abutment part 42, as the first sealing component, can prevent water vapor and dust particles from entering the first through hole 11 from the gap between the first insulating member 2 and the cover plate body, and prevent moisture from connecting the metal cover plate body and the electrode post 3, causing a short circuit in the battery. The annular sealing body 41, as the second sealing component, can prevent water vapor from penetrating through the annular abutment part 42 and causing a short circuit in the battery. The annular sealing body 41 fills the gap between the inner peripheral wall of the first through hole 11 of the cover plate body and the outer peripheral wall of the electrode post 3.

[0043] By providing two lines of defense against the intrusion of moisture and dust particles, the battery's sealing performance and protection level are significantly improved. The annular sealing body 41, acting as a second seal, further prevents any moisture that might breach the first seal from penetrating, ensuring the battery's interior remains dry and clean. This design not only enhances the battery's resistance to environmental factors such as humidity and dust but also improves battery safety, preventing short-circuit risks caused by moisture, thereby extending battery life and increasing reliability. Furthermore, this structure can accommodate the decline in sealing performance caused by aging deformation of the first insulating component 2, maintaining the battery's long-term stability.

[0044] To further improve the battery's sealing performance and to prevent the terminal plate 32 of the terminal post 3 from contacting the bottom surface of the cover plate body, the sealing element 4 also includes an annular bottom plate 43. For details, please refer to further documentation. Figure 4 and Figures 6 to 9 The diameter of the annular base plate 43 is larger than that of the annular abutment portion 42 and the annular sealing body 41. After the sealing element 4, the terminal post 3, and the cover plate body are assembled, the upper top surface of the annular base plate 43 abuts against the lower top surface of the cover plate body, and the lower top surface of the annular base plate 43 abuts against the end of the terminal post plate 32, thereby preventing the terminal post 3 from directly contacting the cover plate body and causing a short circuit. In addition, the annular base plate 43 can also further improve the sealing performance of the battery. Especially when assembling the sealing element 4, dust particles will fall onto the upper top surface of the annular base plate 43, and the annular base plate 43 plays a role in bearing the particles, thereby ensuring that the particles do not enter the interior of the casing.

[0045] It should be noted that the annular base plate 43, the annular abutment portion 42, and the annular sealing body 41 can be integrally molded or separately connected and fixed. This application does not impose any restrictions on this. In one embodiment of this application, the annular base plate 43, the annular abutment portion 42, and the annular sealing body 41 are integrally molded. Using an integrally molded structure for the annular base plate 43, the annular abutment portion 42, and the annular sealing body 41 simplifies the production process, improves manufacturing efficiency, and enhances the overall sealing performance and structural stability. This design reduces the number of components and assembly steps, lowers production costs, and, due to the continuity and integrity of the seal 4, more effectively prevents the intrusion of moisture and impurities, thereby improving the reliability and durability of the battery.

[0046] This application does not limit the materials used for the annular base plate 43, the annular abutment portion 42, and the annular sealing body 41; they can be fluororubber or nitrile rubber. In one embodiment of this application, all three components—the annular base plate 43, the annular abutment portion 42, and the annular sealing body 41—are made of fluororubber. Fluororubber has excellent chemical and oil resistance, effectively resisting the erosion of the electrolyte inside the battery. It also possesses good high-temperature and low-temperature resistance, maintaining a stable sealing effect under extreme temperatures. Furthermore, fluororubber has excellent aging resistance and compression set resistance, ensuring a reliable seal throughout the battery's lifespan, preventing the intrusion of moisture and impurities, thereby ensuring the battery's safety and long-term stability.

[0047] This application does not limit the structure of the seal 4. In the first embodiment of the seal 4 proposed in this application, the annular abutment portion 42 is provided on the upper top surface of the annular sealing body 41, and the radial width of the annular abutment portion 42 is smaller than the radial width of the annular sealing body 41. For details, please refer to further reference. Figure 6 and Figure 7 The annular abutment portion 42 is perpendicular to the upper top surface of the annular sealing body 41. When the first insulating component 2 is assembled with the cover plate body, the abutment surface 231 of the first insulating component 2 will abut against the annular abutment portion 42 and, as the assembly is aligned, the annular abutment portion 42 will deform and abut against the pressing surface 111 and the abutment surface 231 respectively. The annular abutment portion 42 is perpendicular to the upper top surface of the annular sealing body 41, making it easier to injection mold.

[0048] In the second embodiment of the seal 4 proposed in this application, the annular abutment portion 42 is provided on the upper top surface of the annular sealing body 41 and the two are integrally formed. For details, please refer to further reference. Figure 8The annular abutment portion 42 is set at an angle to the upper top surface of the annular sealing body 41. The angle between the annular abutment portion 42 and the upper top surface of the annular sealing body 41 is consistent with the angle between the pressing surface 111 and the abutment surface 231 and the top surface of the cover plate body. This ensures that the annular abutment portion 42 and the pressing surface 111 and the abutment surface 231 are set in parallel. When assembling the sealing element 4, the sealing element 4 is inserted into the first through hole 11 of the cover plate body, and the annular abutment portion 42 abuts against the pressing surface 111 of the cover plate body. Then, the first insulating element 2 is inserted so that the abutment surface 231 of the first insulating element 2 abuts against the upper surface of the annular abutment portion 42. This ensures reliable installation alignment. The use of the annular abutment portion 42, which is inclined together with the pressing surface 111 and the abutment surface 231, can avoid stress concentration at the connection position between the annular abutment portion 42 and the annular sealing body 41 due to long-term bending.

[0049] In the embodiment of the third type of seal 4 proposed in this application, to further improve the sealing performance of the annular abutment portion 42, a first stop wall 421 is provided on the side of the annular abutment portion 42 facing the pressing surface 111, and correspondingly, a second stop wall 422 is provided on the side of the annular abutment portion 42 facing the abutment surface 231. The pressing surface 111 and the abutment surface 231 are respectively provided with a first annular groove and a second annular groove. The first stop wall 421 seals against the first annular groove, and the second stop wall 422 seals against the second annular groove. When assembling the battery cover, the terminal post 3 is inserted into the first through hole 11 of the cover body, and the first stop wall 421 facing the pressing surface 111 is accommodated in the first annular groove. Then, the first insulating component 2 is assembled so that the second stop wall 422 is accommodated in the second annular groove, thus achieving a sealed installation. Through the cooperation between the stop wall and the annular groove, a double barrier effect against water vapor and particulate matter can be achieved. Water vapor and particulate matter are difficult to pass through the barrier formed by the protruding annular stop wall, thereby further improving the sealing performance of the battery cover.

[0050] In one embodiment of this application, the pole post 3 includes a pole post body 31 and a pole post plate 32 connected to each other. The first insulating member 2 has a mounting groove 22 on the side facing away from the cover plate body. For details, please refer to further reading. Figure 2 The mounting groove 22 is used to fix and limit the pressure block 5. The bottom of the mounting groove 22 is provided with a through second hole 21. Part of the structure of the electrode post body 31 passes through the second through hole 21 and is welded to the pressure block 5 located in the mounting groove 22, thereby ensuring the reliability of the connection between the two. In addition, the inner sidewall of the mounting groove 22 can provide physical protection for the pressure block 5, improving the impact resistance of the overall structure of the battery cover.

[0051] In one embodiment of this application, the battery cover body 100 is further provided with a pressure relief valve 12. For details, please refer to further reading. Figure 2The pressure relief valve 12 has a pressure relief cover body 121 at its opening. The main function of the pressure relief valve 12 on the battery cover body 100 is to automatically open and release pressure when the internal pressure of the battery abnormally increases, preventing the battery from exploding or being damaged due to excessive internal pressure. This design helps protect battery safety, ensuring that the battery will not experience dangerous accidents under overcharging, overheating, or other abnormal conditions. The pressure relief valve 12 can protect system equipment, control system pressure, prevent system accidents, and balance system pressure. The pressure relief cover body 121 adopts a thinned, etched design, allowing it to quickly rupture through these weak points when the internal pressure of the battery rises to a certain level, thereby releasing pressure and preventing battery explosion.

[0052] In the embodiments of this application, to facilitate electrolyte injection during battery assembly, the battery cover body 100 is further provided with an injection hole 13. The injection hole 13 is used after the battery cover is welded to the casing. After electrolyte is injected, the injection port is sealed with a sealing pin using laser welding to ensure the battery interior is isolated from the external environment, guaranteeing the chemical environment required for battery operation, and preventing electrolyte leakage. Furthermore, the injection hole 13 is also used to detect pressure changes inside the battery by introducing helium gas during sealing checks after battery cover welding, thereby determining the weld sealing performance.

[0053] This application also proposes a battery cell, which includes a battery body and a battery cover body 100 as described above. The specific structure of the battery cover body 100 is as described in the above embodiments. Since this battery cell adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0054] In addition, this application also provides a battery pack, which includes a battery pack casing and a plurality of battery cells provided in this application. The plurality of battery cells are installed in the battery pack casing by means of parallel arrangement or array arrangement. The battery pack can be used as a power source for an electrical device or as an energy storage unit for an electrical device. The electrical device may include mobile devices (such as mobile phones, laptops, etc.), electric vehicles (such as pure electric vehicles, hybrid electric vehicles, plug-in hybrid electric vehicles, range-extended vehicles, electric bicycles, electric scooters, electric golf carts, electric trucks, etc.), electric trains, ships and satellites, energy storage systems, etc., but is not limited thereto.

[0055] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A battery cover, characterized in that, The battery cover includes: The cover plate body (1) has a first through hole (11) through it, and the cover plate body (1) has a pressing surface (111) at the opening of the first through hole (11); A first insulating member (2), the first insulating member (2) having a second through hole (21) extending through it, and the first insulating member (2) having a pressing structure (23); and A seal (4), at least a portion of which is pressed between the pressing surface (111) and the pressing structure (23).

2. The battery cover plate of claim 1, wherein, The battery cover also includes a terminal post, which includes a terminal post body (31) and a terminal post plate (32) connected to each other. The terminal post is disposed through the first through hole (11) and the second through hole (21). The terminal post plate (32) is disposed on the side of the cover body (1) facing away from the first insulating member (2) and abuts against part of the structure of the sealing member (4).

3. The battery cover plate of claim 2, wherein, The sealing element (4) includes an annular sealing body (41) and an annular abutment portion (42) disposed on the annular sealing body (41). The annular sealing body (41) is sleeved on the pole and located in the first through hole (11). The annular abutment portion (42) abuts against the pressing surface (111) and the abutment surface (231) respectively.

4. The battery cover as described in claim 3, characterized in that, The pressing structure (23) has an abutment surface (231) facing the pressing surface (111), and the annular abutment part (42) has two abutment walls that abut against the pressing surface (111) and the abutment surface (231) respectively. The abutment walls are arranged parallel to the pressing surface (111) and / or the abutment surface (231).

5. The battery cover as described in claim 3, characterized in that, The sealing element (4) further includes an annular base plate (43), which is located on the side of the annular sealing body (41) facing away from the annular abutment portion (42). The annular base plate (43) abuts against the side of the cover plate body (1) facing away from the first insulating element (2).

6. The battery cover plate of claim 5, wherein, The annular abutment part (42), the annular sealing body (41), and the annular base plate (43) are all integrally formed structures.

7. The battery cover plate of claim 5, wherein, The annular abutment portion (42) is provided with a first stop wall (421) and a second stop wall (422) facing the pressing surface (111) and the abutment surface (231), respectively. The pressing surface (111) forms a first annular groove, and the abutment surface (231) forms a second annular groove. The first stop wall (421) and the second stop wall (422) are respectively provided in the first annular groove and the second annular groove.

8. The battery cover as described in claim 2, characterized in that, The battery cover also includes a pressure block (5), the first insulating member (2) is provided with an installation groove (22) facing away from the cover body (1), the pressure block (5) is provided in the installation groove (22) and connected to the pole body (31), and the second through hole (21) is provided in the bottom wall of the installation groove (22).

9. A battery cell characterized by, It includes a housing and a battery body disposed within the housing, the housing including a battery cover as claimed in any one of claims 1 to 8.

10. A battery pack, characterized by, include: Battery pack casing; and at least one battery cell as claimed in claim 9 arranged within the battery pack housing.

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