Battery cover plate, battery and electric equipment

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a battery cover plate, a battery and electric equipment. The battery cover plate comprises a main cover plate, and a first liquid injection hole penetrating in the thickness direction is formed in the main cover plate; the liquid injection valve assembly is arranged on one side of the main cover plate, the end, facing the main cover plate, of the liquid injection valve assembly blocks the first liquid injection hole, a liquid injection channel penetrating in the thickness direction is formed in the liquid injection valve assembly, and the liquid injection valve assembly is suitable for generating elastic deformation under the action of external pressure so that the first liquid injection hole can communicate with the liquid injection channel. According to the utility model, after the liquid in the battery is reduced, the liquid can be supplemented into the battery through the liquid injection valve assembly, so that the service life of the battery is prolonged; and the liquid injection valve assembly is simple in structure and convenient to operate, the liquid injection hole can be communicated with the interior of the battery only by compressing the liquid injection valve assembly through external force, the liquid injection hole can be sealed under the elastic action after the external force is cancelled, and the maintenance operation after the battery product leaves the factory is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and particularly relates to a battery cover plate, a battery and an electrical equipment. Background Art

[0002] As a core component of products such as new energy vehicles, the service life of lithium-ion batteries is one of the key factors affecting product performance. During the use of the battery, the electrolyte and SEI film (Solid Electrolyte Interface) are gradually consumed, and the shuttle ability of lithium ions between battery electrodes is affected, thereby resulting in the attenuation of the battery's cycle life. Some structural improvement solutions for replenishing the electrolyte to the battery are provided in the prior art. For example, a liquid replenishing valve is provided on the battery cover plate. However, some of the liquid replenishing valve structures in the prior art are relatively complex and usually require complex disassembly operations, which are suitable for the liquid replenishing operation before the battery leaves the factory, but not suitable for the secondary liquid replenishing operation after leaving the factory, resulting in difficulties in the later maintenance of battery products and poor user experience. Summary of the Utility Model

[0003] In view of this, in order to improve at least one of the above problems existing in the prior art, the utility model provides a battery cover plate, a battery and an electrical equipment.

[0004] The technical solution of the utility model provides a battery cover plate, including: a main cover plate, on which a first liquid injection hole penetrating in the thickness direction is provided; a liquid injection valve assembly, arranged on one side of the main cover plate, and one end of the liquid injection valve assembly facing the main cover plate blocks the first liquid injection hole. Wherein, a liquid injection channel penetrating in the thickness direction is opened on the liquid injection valve assembly, and the liquid injection valve assembly is adapted to elastically deform under the action of an external pressure so that the first liquid injection hole is communicated with the liquid injection channel.

[0005] In a feasible implementation manner, the liquid injection valve assembly includes: a liquid injection valve cover, corresponding to the first liquid injection hole, on one side of the liquid injection valve cover facing the first liquid injection hole, a first groove is provided, and the liquid injection channel is opened at the bottom of the first groove. The periphery of the liquid injection valve cover abuts against the main cover plate; an elastic valve core, arranged in the first groove, in the thickness direction, one end of the elastic valve core blocks the first liquid injection hole, and the other end of the elastic valve core abuts against the bottom surface of the first groove and is arranged in a dislocation manner with the liquid injection channel.

[0006] In a feasible implementation manner, on the side of the main cover plate facing the liquid injection valve assembly, a second groove is opened at the outer edge of the first liquid injection hole. The second groove is communicated with the first liquid injection hole, and the second groove and the first groove are combined to form a receiving cavity for receiving the elastic valve core; wherein, one end of the elastic valve core facing the first liquid injection hole abuts against the bottom wall of the second groove, and in the initial state, the first groove and the second groove tightly fix the elastic valve core, and the initial compression amount of the elastic valve core is less than the maximum compression amount.

[0007] In a feasible implementation, on one side of the main cover plate facing the liquid injection valve assembly, a third groove is formed at the outer edge of the second groove, and the shape of the third groove is adapted to the liquid injection valve cover;

[0008] One end of the liquid injection valve cover facing the main cover plate extends into the third groove and is fixedly connected to the inner wall surface of the third groove.

[0009] In a feasible implementation, the elastic valve core is a rubber valve or a resin valve resistant to electrolyte; and / or the opening pressure of the elastic valve core is greater than or equal to 0.03 MPa.

[0010] In a feasible implementation, there is a preset gap between the outer edge of the elastic valve core and the inner side wall of the first groove; a plurality of liquid injection channels are provided in the first groove, and the plurality of liquid injection channels are located at the preset gap and are arranged at intervals along the circumferential direction of the elastic valve core.

[0011] In a feasible implementation, a fourth groove is provided at the outer edge of the end of the first liquid injection hole away from the liquid injection valve assembly, and a dust-proof film covering the first liquid injection hole is provided in the fourth groove; and / or the battery cover plate further includes a lower plastic cover plate, the lower plastic cover plate is arranged on the side of the main cover plate facing the liquid injection valve assembly, and a second liquid injection hole opposite to the first liquid injection hole is provided on the lower plastic cover plate.

[0012] In a feasible implementation, one end of the lower plastic cover plate in the length direction is provided with a flippable wing plate, and the wing plate can be flipped to the side of the lower plastic cover plate away from the main cover plate; wherein, a third liquid injection hole communicating with the second liquid injection hole is provided on the wing plate.

[0013] The second aspect technical solution of the present utility model provides a battery, including: the battery cover plate in any one of the above first aspects.

[0014] The third aspect technical solution of the present utility model provides an electrical equipment, including: the battery in any one of the above second aspects.

[0015] The beneficial effects of the above technical solutions of the present utility model are reflected in:

[0016] A battery cover plate with a liquid replenishment function is provided. When applied to a battery, it can supplement liquids such as electrolyte into the battery through the liquid injection valve assembly after the electrolyte inside the battery decreases, so as to extend the service life of the battery; moreover, the structure of the liquid injection valve assembly is simple and the operation is convenient. Only by applying an external force to compress the liquid injection valve assembly can the liquid injection hole be communicated with the inside of the battery, and the liquid injection hole can be closed under the elastic action after the external force is cancelled, which is convenient for the maintenance operation after the battery product leaves the factory and is used. Description of the Drawings

[0017] Figure 1The following is a partial structural exploded view of a battery cover plate provided by an embodiment of the present utility model (the liquid injection valve assembly and the main cover plate are in a separated state).

[0018] Figure 2 The following is a schematic view of the bottom structure of a battery cover plate provided by an embodiment of the present utility model.

[0019] Figure 3 The following is a cross-sectional view of a battery cover plate provided by an embodiment of the present utility model (the elastic valve core is in the initial state).

[0020] Figure 4 The following is a cross-sectional view of another battery cover plate provided by an embodiment of the present utility model (the state where the elastic valve core is compressed and the first liquid injection hole is communicated with the liquid injection channel).

[0021] Figure 5 The following is an exploded view of a battery cover plate provided by an embodiment of the present utility model.

[0022] Figure 6 The following is an exploded view of a battery cover plate provided by an embodiment of the present utility model from another perspective.

[0023] Figure 7 The following is a schematic view of a liquid injection valve cover provided by an embodiment of the present utility model.

[0024] Figure 8 The following is a schematic view of an elastic valve core provided by an embodiment of the present utility model.

[0025] Figure 9 The following is a top view of a liquid injection valve assembly provided by an embodiment of the present utility model.

[0026] Figure 10 The following is a bottom view of a liquid injection valve assembly provided by an embodiment of the present utility model.

[0027] Among them, in the above-mentioned drawings, arrow X represents the length direction of the main cover plate, arrow Y represents the width direction of the main cover plate, and arrow Z represents the thickness direction of the main cover plate;

[0028] In Figure 4 the solid arrow F represents the direction of the external pressure acting on the elastic valve core, and the dashed arrow L represents the flow direction of the liquid during the liquid replenishment operation.

[0029] Explanation of reference numerals:

[0030] 100 Battery cover plate;

[0031] 1 Main cover plate, 11 First liquid injection hole, 12 Second groove, 13 Third groove, 14 Fourth groove, 15 Dust-proof film;

[0032] The plastic cover plate below, 21 the second liquid injection hole, 22 the wing plate, 221 the third liquid injection hole;

[0033] The liquid injection valve assembly 3, 31 the liquid injection valve cover, 311 the first groove, 312 the liquid injection channel, 32 the elastic valve core. Specific embodiments

[0034] In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined. In the embodiments of the present application, all directional indications (such as up, down, left, right, front, back, top, bottom...) are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices.

[0035] In addition, the mention of "embodiment" in this article means that the specific features, structures or characteristics described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0036] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0037] Some embodiments of the battery cover plate, battery and electrical equipment in the technical solution of the present utility model are provided below.

[0038] In an embodiment of the present utility model, a battery cover plate 100 is provided, as Figure 1 and Figure 2As shown, the battery cover plate 100 includes a main cover plate 1 and a liquid injection valve assembly 3. A first liquid injection hole 11 is provided on the main cover plate 1, and the first liquid injection hole 11 penetrates through the main cover plate 1 in the thickness direction Z of the main cover plate 1; the liquid injection valve assembly 3 is arranged on one side of the main cover plate 1 and is correspondingly arranged with the first liquid injection hole 11. One end of the liquid injection valve assembly 3 facing the main cover plate 1 blocks the first liquid injection hole 11, so that when the battery cover plate 100 is assembled on the battery, the initial state of the first liquid injection hole 11 is a closed state, as Figure 3 shown in the state. Among them, a liquid injection channel 312 penetrating through the main cover plate 1 in the thickness direction Z is provided on the liquid injection valve assembly 3. When assembled on the battery, the liquid injection channel 312 can be communicated with the inside of the battery; the liquid injection valve assembly 3 can undergo elastic deformation under the action of an external pressure and be compressed in the thickness direction Z to release the blocking of the first liquid injection hole 11, so that the first liquid injection hole 11 is communicated with the liquid injection channel 312. When the battery cover plate 100 is assembled on the battery, pressure can be applied to the liquid injection valve assembly 3 in the thickness direction Z of the main cover plate 1 to make the first liquid injection hole 11 communicate with the inside of the battery through the liquid injection channel 312, as Figure 4 shown in the state, so as to facilitate replenishing liquid into the battery through the first liquid injection hole 11. Among them, the liquid includes but is not limited to electrolyte solution.

[0039] It can be understood that since the liquid injection valve assembly 3 blocks the first liquid injection hole 11 in the initial state and only makes the first liquid injection hole 11 communicate with the liquid injection channel 312 when being compressed to generate elastic deformation, when the external force applied to the liquid injection valve assembly 3 is withdrawn, the liquid injection valve assembly 3 can return to the initial state under the action of the elastic force and block the first liquid injection hole 11 again. Among them, by setting a suitable distance, the liquid injection valve assembly 3 can seal the first liquid injection hole 11 in the initial state.

[0040] It should be noted that for the convenience of assembly and operation, when the battery cover plate 100 is assembled on the battery, the side where the liquid injection valve assembly 3 is arranged is located inside the battery, and the side of the main cover plate 1 away from the liquid injection valve assembly 3 is located outside the battery. When performing the liquid replenishment operation on the battery, the liquid injection valve assembly 3 can be squeezed through a tool or a liquid injection mechanism passing through the first liquid injection hole 11 to open the first liquid injection hole 11.

[0041] In this embodiment, the structural form of the existing battery cover plate 100 is improved, and a battery cover plate 100 with a liquid replenishment function is provided. When applied to a battery, it can replenish liquids such as electrolyte solution into the battery through the liquid injection valve assembly 3 after the electrolyte solution inside the battery decreases, so as to extend the service life of the battery; moreover, the liquid injection valve assembly 3 has a simple structure and convenient operation. Only by externally compressing the liquid injection valve assembly 3 can the liquid injection hole be communicated with the inside of the battery, and after the external force is cancelled, the liquid injection hole can be closed by using the elastic effect, which is convenient for the maintenance operation after the battery product leaves the factory and is used.

[0042] In addition, in practical applications, such as Figure 1 and Figure 2 in the examples, other structures can also be provided on the main cover plate 1 according to requirements, such as pole holes, pressure relief holes, etc., which will not be elaborated here.

[0043] In a further embodiment of the present invention, as shown in Figure 5 , Figure 6 , Figure 7 and Figure 8 the liquid injection valve assembly 3 includes a liquid injection valve cover 31 and an elastic valve core 32. The liquid injection valve cover 31 is correspondingly arranged with the first liquid injection hole 11; a first groove 311 is formed on one side of the liquid injection valve cover 31 facing the first liquid injection hole 11, the first groove 311 is communicated with the first liquid injection hole 11, and a through liquid injection channel 312 is formed at the bottom of the first groove 311. The periphery of the liquid injection valve cover 31 abuts against the main cover plate 1 so that the first liquid injection hole 11 is surrounded within the range of the liquid injection valve cover 31 to block the first liquid injection hole 11. Correspondingly, the elastic valve core 32 is arranged in the first groove 311 of the liquid injection valve cover 31, and in the thickness direction Z of the main cover plate 1, one end of the elastic valve core 32 facing the main cover plate 1 abuts against the main cover plate 1 to block the first liquid injection hole 11; the other opposite end of the elastic valve core 32 abuts against the bottom surface of the first groove 311 so that both ends of the elastic valve core 32 are clamped by the main cover plate 1 and the liquid injection valve cover 31; wherein, the elastic valve core 32 is arranged in a dislocation manner with the liquid injection channel 312 in the first groove 311 to avoid blocking the liquid injection channel 312. When the elastic valve core 32 is compressed by the pressure in the thickness direction Z, the end surface of the end of the elastic valve core 32 facing the main cover plate 1 is separated from the main cover plate 1. As shown in Figure 4 in the examples, the liquid flowing in from the first liquid injection hole 11 can flow laterally along the liquid injection valve core into the liquid injection channel 312 of the first groove 311 and then flow into the battery interior. In addition, the elastic valve core 32 is located in the first groove 311 of the liquid injection valve cover 31 so that the elastic valve core 32 is isolated from the internal structure of the battery, and can also play a certain protective role for the elastic valve core 32.

[0044] Furthermore, as shown in Figures 3 to 6As shown in the figure, on one side of the main cover plate 1 facing the liquid injection valve assembly 3, there is a second groove 12. The second groove 12 is located at the periphery of the first liquid injection hole 11 and is communicated with the first liquid injection hole 11. The first groove 311 of the liquid injection valve cover 31 is aligned with the second groove 12 of the main cover plate 1 to form a receiving cavity, and the elastic valve core 32 is accommodated in this receiving cavity. At the same time, during the liquid injection operation, a certain accommodation space can be provided for the liquid. One end of the elastic valve core 32 facing the first liquid injection hole 11 is located in the second groove 12 and abuts against the bottom wall of the second groove 12. In the initial state, the elastic valve core 32 is pressed and fixed by the first groove 311 and the second groove 12 in the thickness direction Z, and the initial compression amount of the elastic valve core 32 is less than the maximum compression amount. That is, in the initial state, the elastic valve core 32 is in a certain degree of compressed state, such as Figure 3 the state shown in it, to meet the blocking and sealing of the first liquid injection hole 11; when liquid injection is required, by applying pressure to the elastic valve core 32 in the thickness direction Z of the main cover plate 1, the elastic valve core 32 can be further compressed to the maximum compression amount, such as Figure 4 the state shown in it, so that the first liquid injection hole 11 is opened and communicated with the liquid injection channel 312.

[0045] It should be noted that the initial compression amount of the elastic valve core 32 can be set according to the specific material, elastic performance, etc. of the elastic valve core 32 to meet the use requirements.

[0046] In addition, in practical applications, the elastic valve core 32 can be fixedly connected to the first groove 311, for example, by bonding or setting corresponding connection structures at the bottom of the first groove 311, etc., to realize the fixation of the elastic valve core 32.

[0047] Furthermore, as Figure 3 、 Figure 4 and Figure 6 shown, on one side of the main cover plate 1 facing the liquid injection valve assembly 3, there is a third groove 13, and the third groove 13 is located at the outer edge of the second groove 12; the shape of the third groove 13 is adapted to the liquid injection valve cover 31. One end of the liquid injection valve cover 31 facing the main cover plate 1 extends into the third groove 13 and is fixedly connected to the inner wall surface of the third groove 13. The specific connection method can be that the end face of the liquid injection valve cover 31 is fixedly connected to the bottom wall of the third groove 13, and / or the outer side wall of the liquid injection valve cover 31 is fixedly connected to the inner side wall of the third groove 13, for example, by using interference fit, bonding, welding and other methods for connection and fixation.

[0048] Furthermore, as Figure 3 、 Figure 4 、 Figure 9 and Figure 10As shown, there is a preset gap between the outer edge on the side of the elastic valve core 32 and the inner wall of the first groove 311 of the liquid injection valve cover 31. Multiple liquid injection channels 312 are provided at positions corresponding to the preset gap in the first groove 311, so that the liquid injection channels 312 are not blocked by the elastic valve core 32, and each liquid injection channel 312 can communicate with the first liquid injection hole 11 to increase the flow rate of the liquid injection operation. Among them, the multiple liquid injection channels 312 are arranged at intervals along the circumferential direction of the elastic valve core 32, so that the liquid flowing into the first groove 311 from the first liquid injection hole 11 can flow through each liquid injection channel 312 more evenly to the inside of the battery, preventing phenomena such as blockage or impact caused by excessive local flow rate.

[0049] Furthermore, the elastic valve core 32 is specifically made of rubber or resin resistant to electrolyte, such as a rubber valve or a resin valve, so as to prevent being corroded by the electrolyte and thus improve the service life of the elastic valve core 32. For example, the elastic valve core 32 can specifically be made of fluororubber or PFA (Polyfluoroalkoxy, a copolymer of tetrafluoroethylene and perfluoroalkoxy vinyl ether, a fluoroplastic) or EPDM (Ethylene Propylene Diene Monomer, a terpolymer of ethylene, propylene and a small amount of non-conjugated diene). Of course, it is not limited to the above several materials, and other elastic materials resistant to electrolyte can also be used.

[0050] Furthermore, the opening pressure of the elastic valve core 32 is greater than or equal to 0.03 Mpa. In the initial state, when an external pressure is applied to the elastic valve core 32, when the pressure value per square centimeter is greater than or equal to 0.03 N (i.e., the pressure value ≥ 0.03 Mpa = 0.03 N / cm 2 ), the elastic valve core 32 can generate a further compression amount to open the first liquid injection hole 11. If the pressure is small, the elastic valve core 32 will not generate a further compression amount. The above requirements can be met by setting the elastic valve core 32 with an appropriate elastic coefficient. Through the above settings, a certain prestress can be generated in the elastic valve core 32 in the initial state to prevent the phenomenon that the first liquid injection hole 11 is opened due to the loosening of the elastic valve core 32 during non-liquid injection operations.

[0051] In addition, during the liquid injection operation, the external pressure applied to the elastic valve core 32 should be controlled within an appropriate range. Preferably, the pressure value of the external pressure on the elastic valve core 32 should be less than or equal to 0.1 MPa. It can be understood that when the elastic valve core 32 is compressed by the external pressure acting in the Z direction of the thickness, corresponding elastic deformation occurs, causing a certain change in volume. Since the assembly space in the battery housing is relatively narrow, if the elastic deformation amount of the elastic valve core 32 is too large, it is likely to squeeze the battery housing, and there is a possibility of causing the battery housing to expand under pressure. Therefore, during the liquid injection operation, by limiting the maximum value of the external pressure applied to the elastic valve core 32, the phenomenon of the battery housing expanding caused by the liquid injection operation can be effectively avoided.

[0052] In a further embodiment of the present invention, as Figures 3 to 6 shown, a fourth groove 14 is further provided on the main cover plate 1. The fourth groove 14 is located at the outer edge of the first liquid injection hole 11 away from the liquid injection valve assembly 3. A dust-proof film 15 covering the first liquid injection hole 11 is provided in the fourth groove 14 to prevent dust and other impurities from entering the first liquid injection hole 11 and causing blockage. It can be understood that during the liquid replenishment operation, the dust-proof film 15 can be torn off from the outside to facilitate the extrusion of the liquid injection valve assembly 3 and the liquid injection operation. The dust-proof film 15 can adopt a disposable film structure, and a new dust-proof film 15 can be replaced and pasted in the fourth groove 14 after the liquid injection operation. Among them, the dust-proof film 15 can specifically adopt a plastic paper film.

[0053] Preferably, as Figures 1 to 6 shown, the first liquid injection hole 11 adopts a circular hole structure, and both the liquid injection valve cover 31 and the elastic valve core 32 adopt the cylindrical structures shown in Figure 7 and Figure 8 , while the first groove 311, the second groove 12, the third groove 13, and the fourth groove 14 all adopt the circular groove structures shown in Figures 3 to 6 .

[0054] In a further embodiment of the present invention, as Figures 1 to 6 shown, the battery cover plate 100 further includes a lower plastic cover plate 2. The lower plastic cover plate 2 is disposed on the side of the main cover plate 1 facing the liquid injection valve assembly 3, and the main cover plate 1 and the lower plastic cover plate 2 are stacked; wherein, a second liquid injection hole 21 is provided at a position on the lower plastic cover plate 2 opposite to the first liquid injection hole 11 to provide an installation space for the liquid injection valve assembly 3, and when the battery cover plate 100 is assembled in the battery, after the first liquid injection hole 11 is communicated with the liquid injection channel 312 of the liquid injection valve assembly 3, the liquid can flow smoothly into the battery interior and will not be blocked by the lower plastic cover plate 2.

[0055] Furthermore, as Figures 1 to 6In the example of , one end of the lower plastic cover plate 2 in the length direction X is provided with a wing plate 22. The wing plate 22 is rotatably connected to the lower plastic cover plate 2 and can be flipped relative to the lower plastic cover plate 2 to the side away from the main cover plate 1 for assembling the battery cell. Wherein, a third connection hole is opened at a position on the wing plate 22 opposite to the second liquid injection hole 21, so that in the assembled state, as Figure 3 and Figure 4 In the example of , the third connection hole is communicated with the second connection hole, so that the liquid flowing in from the first liquid injection hole 11 can enter the battery through the second connection hole and the third connection hole, so as to avoid the wing plate 22 from blocking the liquid.

[0056] In practical applications, a part of the structure of the liquid injection valve assembly 3 can be arranged in the second liquid injection hole 21 of the lower plastic cover plate 2, or as Figure 3 and Figure 4 In the example of , the liquid injection valve assembly 3 passes through the second liquid injection hole 21 of the lower plastic cover plate 2. And a part of the liquid injection valve assembly 3 can also be located in the third liquid injection hole 221, such as Figure 3 and Figure 4 In the example of , or, the liquid injection valve assembly 3 can also be arranged to pass through the third liquid injection hole 221. The specific positional relationship can be set according to the assembly requirements of the battery, which will not be elaborated here.

[0057] In the embodiment of the second aspect of the present invention, a battery is further provided. The battery includes the battery cover plate 100 in any one of the above-mentioned first aspect embodiments, so that the battery has a liquid injection function through the first liquid injection hole 11 on the battery cover plate 100 and the liquid injection valve assembly 3. When the liquid such as the electrolyte inside the battery decreases, the liquid injection operation can be carried out through the first liquid injection hole 11. Wherein, the liquid injection valve assembly 3 can undergo elastic deformation under an external force, so that the first liquid injection hole 11 is communicated with the inside of the battery through the liquid injection channel 312, so that the liquid injected during the liquid injection operation flows into the battery to realize the liquid supplement inside the battery. Wherein, the liquid is not limited to the electrolyte, and can also be other liquids required inside the battery.

[0058] Furthermore, the battery further includes components such as a battery cell and a battery housing. During assembly, the battery cell is located inside the battery housing, and the battery cover plate 100 is correspondingly arranged at one end of the battery cell, so that the liquid injection channel 312 of the liquid injection valve assembly 3 can be communicated with the inside of the battery cell.

[0059] Furthermore, according to the processing requirements, the main cover plate 1 of the battery cover plate 100 can also be provided with structures such as pole holes and pressure relief holes, which will not be elaborated here.

[0060] In addition, the battery in this embodiment has all the beneficial effects of the battery cover plate 100 in any one of the above-mentioned embodiments, which will not be elaborated here.

[0061] In an embodiment of the third aspect of the present utility model, an electrical device is provided. The electrical device includes the battery in any of the embodiments of the second aspect above to supply power to the electrical device through the battery.

[0062] In addition, the electrical device in this embodiment has all the beneficial effects of the battery in any of the above embodiments, which will not be elaborated here.

[0063] The basic principles of the present utility model have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, benefits, effects, etc. mentioned in the present utility model are only examples and not limitations. It cannot be considered that these advantages, benefits, effects, etc. are essential for each embodiment of the present utility model. In addition, the specific details disclosed above are only for illustrative and easy-to-understand purposes and are not limitations. The above details do not limit the present utility model to necessarily adopt the above specific details to be implemented.

[0064] The block diagrams of the devices, apparatuses, equipment, and systems involved in the present utility model are only illustrative examples and do not intend to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any way. Words such as "including", "comprising", "having", etc. are open-ended words, meaning "including but not limited to", and can be used interchangeably with each other. The word "or" and "and" used here refer to the word "and / or" and can be used interchangeably with each other, unless the context clearly indicates otherwise. The word "such as" used here refers to the phrase "such as but not limited to" and can be used interchangeably with each other. It should also be noted that in the devices and equipment of the present utility model, each component can be disassembled and / or recombined. These disassembly and / or recombination should be regarded as equivalent solutions of the present utility model.

[0065] The above description has been given for purposes of illustration and description. In addition, this description does not intend to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions, and sub-combinations thereof. The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these aspects are very obvious to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of the present utility model. Therefore, the present utility model is not intended to be limited to the aspects shown herein, but rather to the broadest scope consistent with the principles and novel features of the present utility model.

[0066] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A battery cover plate, characterized in that, Comprising: A main cover plate (1) having a first liquid injection hole (11) penetrating in the thickness direction (Z) thereon; A liquid injection valve assembly (3) provided on one side of the main cover plate (1), and one end of the liquid injection valve assembly (3) facing the main cover plate (1) blocks the first liquid injection hole (11). Wherein, a liquid injection channel (312) penetrating in the thickness direction (Z) is formed on the liquid injection valve assembly (3), and the liquid injection valve assembly (3) is adapted to elastically deform under an external pressure so that the first liquid injection hole (11) communicates with the liquid injection channel (312).

2. The battery cover plate according to claim 1, characterized in that The liquid injection valve assembly (3) includes: A liquid injection valve cover (31) correspondingly arranged with the first liquid injection hole (11). A first groove (311) is provided on one side of the liquid injection valve cover (31) facing the first liquid injection hole (11), and the liquid injection channel (312) is formed at the bottom of the first groove (311). The periphery of the liquid injection valve cover (31) abuts against the main cover plate (1); An elastic valve core (32) is arranged in the first groove (311). In the thickness direction (Z), one end of the elastic valve core (32) blocks the first liquid injection hole (11), and the other end of the elastic valve core (32) abuts against the bottom surface of the first groove (311) and is arranged out of alignment with the liquid injection channel (312).

3. The battery cover plate according to claim 2, characterized in that On one side of the main cover plate (1) facing the liquid injection valve assembly (3), a second groove (12) is formed at the outer edge of the first liquid injection hole (11). The second groove (12) communicates with the first liquid injection hole (11), and the second groove (12) and the first groove (311) are aligned to form a receiving cavity for receiving the elastic valve core (32); Wherein, one end of the elastic valve core (32) facing the first liquid injection hole (11) abuts against the bottom wall of the second groove (12), and in the initial state, the first groove (311) and the second groove (12) press and fix the elastic valve core (32), and the initial compression amount of the elastic valve core (32) is less than the maximum compression amount.

4. The battery cover plate according to claim 3, characterized in that On one side of the main cover plate (1) facing the liquid injection valve assembly (3), a third groove (13) is formed at the outer edge of the second groove (12). The shape of the third groove (13) is adapted to the liquid injection valve cover (31); One end of the liquid injection valve cover (31) facing the main cover plate (1) extends into the third groove (13) and is fixedly connected to the inner wall surface of the third groove (13).

5. The battery cover plate according to claim 2, characterized in that The elastic valve core (32) is a rubber valve or resin valve resistant to electrolyte; and / or The opening pressure of the elastic valve core (32) is greater than or equal to 0.03 MPa.

6. The battery cover plate according to claim 2, characterized in that There is a preset gap between the outer edge of the elastic valve core (32) and the inner side wall of the first groove (311); A plurality of the liquid injection channels (312) are provided in the first groove (311), and the plurality of liquid injection channels (312) are located at the preset gap and are arranged at intervals along the circumferential direction of the elastic valve core (32).

7. The battery cover plate according to claim 1, wherein A fourth groove (14) is provided on the outer edge of one end of the first liquid injection hole (11) away from the liquid injection valve assembly (3), and a dust-proof film (15) covering the first liquid injection hole (11) is provided in the fourth groove (14); and / or The battery cover plate further includes a lower plastic cover plate (2), the lower plastic cover plate (2) is arranged on the side of the main cover plate (1) facing the liquid injection valve assembly (3), and a second liquid injection hole (21) opposite to the first liquid injection hole (11) is provided on the lower plastic cover plate (2).

8. The battery cover plate according to claim 7, wherein One end of the lower plastic cover plate (2) in the length direction (X) is provided with a flippable wing plate (22), and the wing plate (22) can be flipped to the side of the lower plastic cover plate (2) away from the main cover plate (1); Wherein, a third liquid injection hole (221) communicating with the second liquid injection hole (21) can be provided on the wing plate (22).

9. A battery, characterized in that, Comprising: The battery cover plate according to any one of claims 1 to 8.

10. An electrical device, characterized in that, Comprising: The battery according to claim 9.

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