Battery cover plate assembly and battery

Abstract

The utility model provides a battery cover plate assembly and a battery, and relates to the technical field of battery accessories, the battery cover plate assembly comprises an anti-explosion valve, a protection sheet and a positioning component, a positioning part is formed on the positioning component, a first positioning groove is formed in the circumferential direction of the positioning part, the anti-explosion valve is embedded in the first positioning groove, and the size of the first positioning groove is larger than that of the positioning part; the protection sheet can cover part of the area of the positioning part so as to form air holes. The first positioning groove with the size larger than that of the positioning part is formed in the circumferential direction of the positioning part, a position can be provided for installation of the anti-explosion valve, generated welding slag can be borne through the first positioning groove when the anti-explosion valve is welded, and therefore the welding slag is prevented from entering the positioning part to a certain degree, and the welding quality is improved. Therefore, the problem of internal short circuit caused by the fact that welding slag falls into the battery during assembly is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of battery accessories, in particular to a battery cover assembly and a battery. Background Art

[0002] As lithium-ion battery technology becomes increasingly mature, lithium-ion batteries are widely used as power batteries in electric vehicles and energy storage fields, and the requirements for the performance and safety of lithium-ion batteries are increasing.

[0003] At present, the connection between the bare aluminum plate and the explosion-proof valve is mostly carried out by welding. The welding position of the existing explosion-proof valve and the bare aluminum plate is located at the bottom of the bare aluminum plate, that is, the inside of the battery. Since welding slag is inevitably generated during the welding process, it will remain at the welding position. When the battery is assembled, the welding slag may enter the battery and cause an internal short circuit.

[0004] Therefore, there is an urgent need to provide a battery cover assembly and a battery to solve the problems existing in the prior art to a certain extent. Utility Model Content

[0005] The utility model aims to provide a battery cover assembly, so as to avoid, to a certain extent, the problem of internal short circuit caused by welding slag falling into the battery during assembly.

[0006] The utility model provides a battery cover assembly, including an explosion-proof valve, a protective sheet and a positioning component; a positioning portion is formed on the positioning component, a first positioning groove is formed along the circumference of the positioning portion, the explosion-proof valve is embedded in the first positioning groove, and the size of the first positioning groove is larger than the size of the positioning portion; the protective sheet can cover part of the area of ​​the positioning portion to form a vent hole.

[0007] Wherein, a plurality of reinforcing ribs are formed in the positioning portion, and the plurality of reinforcing ribs are arranged at staggered intervals.

[0008] Specifically, hollow holes are formed between the plurality of reinforcing ribs, and the area of ​​the hollow holes accounts for 20%-95% of the area of ​​the positioning portion.

[0009] Furthermore, the thickness of the edge of the explosion-proof valve is amm, and the depth of the first positioning groove is amm±0.3mm.

[0010] Furthermore, a second positioning groove is formed along the circumference of the first positioning groove, and the size of the second positioning groove is larger than that of the first positioning groove.

[0011] Among them, the battery cover assembly provided by the utility model also includes an upper plastic and a lower plastic, the upper plastic and the lower plastic are relatively arranged on both sides of the positioning component, and the lower plastic is formed with an avoidance hole at the position corresponding to the positioning part, and the avoidance hole is connected with the hollow hole.

[0012] Specifically, the battery cover assembly provided by the utility model also includes a pole and a riveted component, the lower plastic is formed with a first through-hole at the position corresponding to the pole, the positioning component is formed with a second through-hole at the position corresponding to the first through-hole, and the upper plastic is formed with a third through-hole at the position corresponding to the second through-hole, and the pole is connected to the riveted component through the first through-hole, the second through-hole and the third through-hole.

[0013] Furthermore, the pole includes a connecting section and an abutting section, the connecting section is arranged on the abutting section, the size of the abutting section is larger than the size of the connecting section, and the size of the abutting section is larger than the diameter of the first through-hole, so that the connecting section passes through the first through-hole, and the abutting section fits with a side of the lower plastic facing away from the positioning member.

[0014] Furthermore, the positioning portion protrudes from a side of the positioning member away from the lower plastic in a direction away from the lower plastic, or protrudes from a side of the positioning member toward the lower plastic in a direction approaching the lower plastic, or is located on the same plane as the positioning member.

[0015] Compared with the prior art, the battery cover assembly provided by the utility model has the following advantages:

[0016] The battery cover assembly provided by the utility model comprises an explosion-proof valve, a protective sheet and a positioning component; a positioning portion is formed on the positioning component, a first positioning groove is formed along the circumference of the positioning portion, the explosion-proof valve is embedded in the first positioning groove, and the size of the first positioning groove is larger than the size of the positioning portion; the protective sheet can cover part of the area of ​​the positioning portion to form a vent hole.

[0017] From this analysis, it can be seen that by forming a positioning portion on the positioning component, space can be provided for the formation of the first positioning groove, and the first positioning groove formed along the circumference of the positioning portion can provide a bearing position for the explosion-proof valve.

[0018] Furthermore, since the size of the first positioning groove in the present application is larger than the size of the positioning portion, when the explosion-proof valve is embedded in the first positioning groove, the gap formed by the explosion-proof valve and the first positioning groove will not fall into the range of the positioning portion. Therefore, when welding the explosion-proof valve, even if welding slag is generated, the first positioning groove can carry and block the welding slag, thereby preventing the welding slag from entering the positioning portion to a certain extent, and further preventing the problem of welding slag entering the battery and causing a short circuit when the battery is assembled to a certain extent, thereby improving the battery yield and safety of use.

[0019] Correspondingly, the present application enables the protection sheet to cover part of the area of ​​the positioning portion, that is, after the protection sheet in the present application covers the positioning member, it can form an exhaust hole of a certain size between the positioning portion, so that when the battery fails, it can have a pressure relief effect to avoid the risk of battery explosion.

[0020] In addition, the utility model also provides a battery including the battery cover assembly.

[0021] The battery using the battery cover assembly provided in the present application can, to a certain extent, avoid the problem of internal short circuit caused by welding slag entering the interior of the battery during assembly, thereby improving the safety and yield rate of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 An exploded schematic diagram of a first form of a battery cover assembly provided by an embodiment of the utility model;

[0024] Figure 2 A cross-sectional view of a first form of a battery cover assembly provided by an embodiment of the utility model at a first viewing angle;

[0025] Figure 3 An exploded schematic diagram of a second form of a battery cover assembly provided by an embodiment of the utility model;

[0026] Figure 4 A cross-sectional view of a second form of a battery cover assembly provided by an embodiment of the utility model from a first viewing angle;

[0027] Figure 5 An exploded schematic diagram of a third form of a battery cover assembly provided by an embodiment of the utility model;

[0028] Figure 6 A cross-sectional view of a third form of a battery cover assembly provided in an embodiment of the utility model from a first viewing angle.

[0029] In the figure: 1-positioning component; 101-positioning part; 1011-first positioning groove; 1012-second positioning groove; 102-reinforcing rib; 1021-hollow hole; 103-second perforation; 2-lower plastic; 201-avoidance hole; 202-first perforation; 3-upper plastic; 301-third perforation; 4-pole; 401-connecting section; 402-abutting section; 5-riveted component; 6-sealing ring; 7-explosion-proof valve; 8-protective sheet. DETAILED DESCRIPTION

[0030] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0031] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0032] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of the embodiments of the present application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0035] For ease of description, spatial relative terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the drawings. Such spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the drawings.

[0036] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0037] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0038] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application. In addition, the technical solutions between the various embodiments may be combined with each other, but must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be considered that the combination of such technical solutions does not exist and is not within the scope of protection required by the present application.

[0039] like Figure 1-Figure 6As shown, the utility model provides a battery cover assembly, including an explosion-proof valve 7, a protective sheet 8 and a positioning member 1; a positioning portion 101 is formed on the positioning member 1, and a first positioning groove 1011 is formed along the circumference of the positioning portion 101, and the explosion-proof valve 7 is embedded in the first positioning groove 1011, and the size of the first positioning groove 1011 is larger than the size of the positioning portion 101; the protective sheet 8 can cover part of the area of ​​the positioning portion 101 to form a vent.

[0040] Compared with the prior art, the battery cover assembly provided by the utility model has the following advantages:

[0041] The battery cover assembly provided by the utility model can provide space for the formation of the first positioning groove 1011 by forming a positioning portion 101 on the positioning member 1, and the first positioning groove 1011 formed along the circumference of the positioning portion 101 can provide a bearing position for the explosion-proof valve 7.

[0042] Furthermore, since the size of the first positioning groove 1011 in the present application is larger than the size of the positioning portion 101, when the explosion-proof valve 7 is embedded in the first positioning groove 1011, the gap formed by the explosion-proof valve 7 and the first positioning groove 1011 will not fall into the range of the positioning portion 101, so that when the explosion-proof valve 7 is welded, even if welding slag is generated, the welding slag can be carried and blocked by the first positioning groove 101, thereby preventing the welding slag from entering the positioning portion 101 to a certain extent, and further preventing the problem of welding slag entering the battery to cause a short circuit during battery assembly to a certain extent, thereby improving the battery yield and safety of use.

[0043] Correspondingly, the present application enables the protective sheet 8 to cover part of the area of ​​the positioning portion 101, that is, after the protective sheet 8 in the present application covers the positioning member 1, it can form an exhaust hole of a certain size between the protective sheet 8 and the positioning portion 101, so that when the battery fails, it can have a pressure relief effect to avoid the risk of battery explosion.

[0044] It should be noted here that the size of the first positioning groove 1011 mentioned above in the present application is larger than the size of the positioning portion 101, which means that the shape of the first positioning groove 101 is the same as the shape of the positioning portion 101, and the first positioning groove 1011 further expands outward along the circumference of the outermost edge of the positioning portion 101, thereby forming the above-mentioned first positioning groove 1011 with a size larger than the positioning portion 101, thereby achieving stable bearing on the explosion-proof valve 7 and avoiding the risk of welding slag entering the positioning portion 101 to a certain extent.

[0045] Alternatively, if Figure 1-Figure 6 As shown, a plurality of reinforcing ribs 102 are formed in the positioning portion 101 in the present application, and the plurality of reinforcing ribs 102 are arranged at staggered intervals.

[0046] It is understandable that if Figure 1-Figure 6As shown, since the positioning portion 101 in the present application is a waist-shaped perforation, the present application can improve the structural strength of the positioning component 1 corresponding to the position of the positioning portion 101 by forming a plurality of reinforcing ribs 102 in the positioning portion 101 and arranging the plurality of reinforcing ribs 102 in a staggered manner, thereby avoiding deformation during assembly or use, which may cause the explosion-proof valve 7 to fail.

[0047] Preferably, if Figure 1-Figure 6 As shown, the multiple reinforcing ribs 102 in the present application include multiple transverse ribs and multiple longitudinal ribs, and the transverse ribs and the longitudinal ribs are distributed in a crisscross pattern, which is convenient for processing and forming on the one hand, and can also ensure balanced force on the positioning portion 101 on the other hand.

[0048] It should be additionally explained here that the reinforcing ribs 102 in the present application may also be distributed regularly or irregularly, that is, the reinforcing ribs 102 in the present application may also be arranged to cross at the same angle or at different angles.

[0049] Correspondingly, when distributed as transverse ribs and longitudinal ribs, the number of transverse ribs and longitudinal ribs can be the same or different, and the thickness of the reinforcing ribs 102 is between 0.2 mm and 3 mm, and the width is between 0.2 mm and 3 mm.

[0050] It can be understood that since the multiple reinforcing ribs 102 in the present application are arranged at intervals, a hollow hole 1021 can be formed. By making the area of ​​the hollow hole 1021 account for 20%-95% of the area of ​​the positioning portion 101, the stiffness of the positioning component 1 corresponding to the explosion-proof valve 7 can be improved, the deformation of the explosion-proof valve 7 can be reduced, the stability of the opening pressure of the explosion-proof valve 7 can be improved, the pressure relief area of ​​the explosion-proof valve 7 can be guaranteed, and timely exhaust and heat dissipation can be guaranteed.

[0051] Since the thickness of the edge of the explosion-proof valve 7 is relatively large, and the explosion-proof valve 7 needs to be embedded in the first positioning groove 1011, the depth of the first positioning groove 1011 is set to amm±0.3mm, where a is the thickness of the edge of the explosion-proof valve 7, thereby ensuring the compatibility of the explosion-proof valve 7 with the first positioning groove 1011.

[0052] Alternatively, if Figure 1-Figure 6 As shown, in the present application, a second positioning groove 1012 is further formed along the circumference of the first positioning groove 1011 , and the size of the second positioning groove 1012 is larger than that of the first positioning groove 1011 .

[0053] By forming a second positioning groove 1012 of a larger size above the first positioning groove 1011, when the protection sheet 8 covers the positioning portion 101, it can have a certain setting gap with the explosion-proof valve 7, thereby further improving the exhaust capacity and the protection capability of the explosion-proof valve 7. That is, when the protection sheet 8 is deformed by collision, the gap formed by the second positioning groove 1012 and the explosion-proof valve 7 can offset a certain degree of deformation of the protection sheet 8, thereby avoiding damage to the explosion-proof valve 7 to a certain extent.

[0054] Alternatively, if Figure 1-Figure 6 As shown, the battery cover assembly provided by the utility model also includes an upper plastic 3 and a lower plastic 2. The upper plastic 3 and the lower plastic 2 are relatively arranged on both sides of the positioning component 1, and an avoidance hole 201 is formed at the position of the lower plastic 2 corresponding to the positioning portion 101, and the avoidance hole 201 is connected to the hollow hole 1021.

[0055] By forming the avoidance hole 201 at the position of the lower plastic 2 corresponding to the positioning portion 101, on the one hand, Figure 1 In the solution shown in the figure, the positioning portion 101 protrudes away from the upper plastic 3 to provide an installation space for the positioning portion 101. On the other hand, it can also ensure smooth exhaust when the battery fails.

[0056] Alternatively, if Figure 1-Figure 6 As shown, the battery cover assembly provided by the utility model also includes a pole 4 and a riveted component 5, a first through-hole 202 is formed at a position of the lower plastic 2 corresponding to the pole 4, a second through-hole 103 is formed at a position of the positioning component 1 corresponding to the first through-hole 202, a third through-hole 301 is formed at a position of the upper plastic 3 corresponding to the second through-hole 103, and the pole 4 passes through the first through-hole 202, the second through-hole 103 and the third through-hole 301 to be connected to the riveted component 5.

[0057] It is understandable that if Figure 1-Figure 6 As shown, the pole 4 in the present application includes a connecting section 401 and an abutting section 402, the connecting section 401 is arranged on the abutting section 402, the size of the abutting section 402 is larger than the size of the connecting section 401, and the size of the abutting section 402 is larger than the diameter of the first through hole 202, so that the connecting section 401 passes through the first through hole 202, and the abutting section 402 fits with the side of the lower plastic 2 facing away from the positioning member 1.

[0058] During assembly, the first through hole 202, the second through hole 103 and the third through hole 301 are arranged correspondingly to form an installation channel, and the connecting section 401 passes through the formed installation channel to connect with the riveted component 5. At the same time, the abutting section 402 can be fitted with the side of the lower plastic 2 facing away from the positioning component 1, so that the pole 4 can be stably assembled.

[0059] It should be noted that the battery cover assembly provided in the present application also includes a sealing ring 6, which is sleeved on the connecting section 401 to isolate the connecting section 401 from the lower plastic 2, the positioning member 1 and the upper plastic 3, and plays a certain degree of sealing role.

[0060] It is understandable that this application Figure 1 , Figure 3 as well as Figure 5 Three different arrangements of the positioning portion 101 are shown respectively. Figure 1 The positioning portion 101 protrudes from the side of the positioning member 1 facing the lower plastic 2 in a direction close to the lower plastic 2. Accordingly, in this manner, the reinforcing rib 102 is located in the positioning portion 101, and the horizontal position of the reinforcing rib 102 is lower than the lower surface of the positioning member 1 to ensure the structural strength of the protruding positioning portion 101.

[0061] and Figure 3 The positioning portion 101 is formed in the positioning component 1, that is, a waist-shaped hole is opened on the positioning component 1, and the reinforcing rib 102 is in the waist-shaped hole to support the waist-shaped hole. The first positioning groove 1011 is formed above the reinforcing rib 102, and the bottom surface of the first positioning groove 1011 can be located on the same plane as the reinforcing rib 102, so that the explosion-proof valve 7 is mounted on the first positioning groove 1011 and the reinforcing rib 102, or there can be a certain distance between them, so that the explosion-proof valve 7 is only mounted in the first positioning groove 1011.

[0062] and Figure 5 The positioning portion 101 in the structure protrudes away from the lower plastic 2. Accordingly, in this manner, the reinforcing rib 102 is located in the positioning portion 101, and the horizontal position of the reinforcing rib 102 is higher than the upper surface of the positioning member 1 to ensure the structural strength of the protruding positioning portion 101.

[0063] In addition, the utility model also provides a battery including the battery cover assembly.

[0064] The battery using the battery cover assembly provided in the present application can, to a certain extent, avoid the problem of internal short circuit caused by welding slag entering the interior of the battery during assembly, thereby improving the safety and yield rate of the battery.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery cover assembly, characterized in that: It includes an explosion-proof valve, a protective sheet and a positioning component; The positioning member is formed with a positioning portion, a first positioning groove is formed along the circumference of the positioning portion, the explosion-proof valve is embedded in the first positioning groove, and the size of the first positioning groove is larger than the size of the positioning portion; The protection sheet can cover a portion of the area of ​​the positioning portion to form a ventilation hole.

2. The battery cover assembly according to claim 1, characterized in that: A plurality of reinforcing ribs are formed in the positioning portion, and the plurality of reinforcing ribs are arranged at staggered intervals.

3. The battery cover assembly according to claim 2, characterized in that: Hollow holes are formed between the plurality of reinforcing ribs, and the area of ​​the hollow holes accounts for 20%-95% of the area of ​​the positioning portion.

4. The battery cover assembly according to claim 1, characterized in that: The thickness of the edge of the explosion-proof valve is amm, and the depth of the first positioning groove is amm±0.3mm.

5. The battery cover assembly according to claim 1, characterized in that: A second positioning groove is further formed along the circumference of the first positioning groove, and the size of the second positioning groove is larger than that of the first positioning groove.

6. The battery cover assembly according to claim 3, characterized in that: It also includes an upper plastic and a lower plastic, wherein the upper plastic and the lower plastic are relatively arranged on both sides of the positioning component, and an avoidance hole is formed in the lower plastic at a position corresponding to the positioning portion, and the avoidance hole is communicated with the hollow hole.

7. The battery cover assembly according to claim 6, characterized in that: It also includes a pole and a riveted component, the lower plastic is formed with a first through hole at a position corresponding to the pole, the positioning component is formed with a second through hole at a position corresponding to the first through hole, the upper plastic is formed with a third through hole at a position corresponding to the second through hole, and the pole is connected to the riveted component through the first through hole, the second through hole and the third through hole.

8. The battery cover assembly according to claim 7, characterized in that: The pole includes a connecting section and an abutting section, wherein the connecting section is arranged on the abutting section, the size of the abutting section is larger than the size of the connecting section, and the size of the abutting section is larger than the diameter of the first through-hole, so that the connecting section passes through the first through-hole, and the abutting section fits with a side of the lower plastic facing away from the positioning member.

9. The battery cover assembly according to claim 6, characterized in that: The positioning portion protrudes from a side of the positioning member away from the lower plastic in a direction away from the lower plastic, or protrudes from a side of the positioning member facing the lower plastic in a direction approaching the lower plastic, or is located on the same plane as the positioning member.

10. A battery, characterized in that: A battery cover assembly comprising any one of claims 1 to 9.

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