Sealing cover assembly and battery

Abstract

The utility model provides a sealing cover assembly and a battery, relates to the technical field of batteries, and aims to solve the problem that an anti-explosion valve is damaged or opened in advance due to the fact that electrolyte in an end plate impacts the anti-explosion valve when the battery shakes to a certain extent. The sealing cover assembly provided by the utility model comprises a cover plate, a lower plastic part, a bonding part and an end plate, an anti-explosion valve is installed on the cover plate, a hollowed-out part is formed in the position, corresponding to the anti-explosion valve, of the lower plastic part, and a liquid passing hole is formed in the end plate and corresponds to the hollowed-out part. The bonding piece is bonded with the lower plastic piece, and the projection of the bonding piece covers the liquid passing hole.

Description

Technical Field

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

[0002] During the use of the battery, since a receiving cavity is formed in the end cap of the battery, the electrolyte will enter the receiving cavity. When the battery shakes, the electrolyte will shake in the receiving cavity, continuously impacting the explosion-proof valve, resulting in damage to the explosion-proof valve and leakage of the battery core, and even the problem of premature opening of the explosion-proof valve, which greatly affects the service life of the explosion-proof valve and the normal use of the battery.

[0003] Therefore, there is an urgent need to provide a cover assembly and a battery to solve the problems existing in the prior art to a certain extent. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a cover assembly to solve, to a certain extent, the problem that when the battery shakes, the electrolyte in the end plate impacts the explosion-proof valve, causing damage or premature opening of the explosion-proof valve.

[0005] A cover assembly provided by the utility model includes a cover plate, a lower plastic part, an adhesive part and an end plate; an explosion-proof valve is installed on the cover plate, a hollow part is formed in the lower plastic part corresponding to the position of the explosion-proof valve, a liquid passing hole is formed in the end plate, and the liquid passing hole is arranged corresponding to the hollow part; the adhesive part is adhesively connected to the lower plastic part, and the projection of the adhesive part covers the liquid passing hole.

[0006] Wherein, there are multiple adhesive parts, and the multiple adhesive parts are arranged at intervals on the lower plastic part along a first direction, and each adhesive part spans the hollow part along a second direction.

[0007] Specifically, the size of the adhesive part in the second direction is larger than the size of the lower plastic part in the second direction.

[0008] Wherein, there are multiple adhesive parts, and the multiple adhesive parts are arranged at intervals on the lower plastic part along a second direction, and each adhesive part spans the hollow part along a first direction.

[0009] Specifically, the size of the adhesive part in the first direction is larger than the size of the hollow part in the first direction.

[0010] Wherein, there are multiple liquid passing holes, and the multiple liquid passing holes are distributed in a matrix.

[0011] Specifically, a receiving part is formed in the end plate corresponding to the position of the hollow part, the lower plastic part is connected to the end plate, and the liquid passing hole and the hollow part are both communicated with the receiving part.

[0012] Furthermore, the bonding member is made of PE I, P I, PP, PE or PET material.

[0013] Furthermore, the thickness of the bonding member is 25μm - 150μm.

[0014] Compared with the prior art, the capping assembly provided by the present utility model has the following advantages:

[0015] The capping assembly provided by the present utility model includes a cover plate, a lower plastic part, a bonding member and an end plate; an explosion-proof valve is installed on the cover plate, a hollow part is formed at the position of the lower plastic part corresponding to the explosion-proof valve, a liquid passing hole is formed on the end plate, and the liquid passing hole is arranged corresponding to the hollow part; the bonding member is bonded to the lower plastic part, and the projection of the bonding member covers the liquid passing hole.

[0016] It can be analyzed from this that in the present application, the lower plastic part is connected to the end plate, and the battery cell can be protected through the lower plastic part, providing a basis for positioning the cell. Since the explosion-proof valve on the cover plate needs to communicate with the internal cavity of the battery to relieve pressure in time when the internal pressure is too high, a liquid passing hole is formed on the end plate of the present application to facilitate the passage of gas. Correspondingly, by forming a hollow part at the position of the lower plastic part corresponding to the explosion-proof valve, and the hollow part is also arranged corresponding to the liquid passing hole, gas can directly pass through the liquid passing hole and the hollow part to trigger the explosion-proof valve, achieving the purpose of relieving pressure and protecting the battery.

[0017] However, while the gas passes through, the electrolyte will also pass through the liquid passing hole and the hollow part and come into contact with the explosion-proof valve. When the battery shakes, the electrolyte will continuously impact the explosion-proof valve. Therefore, in the present application, a bonding member is further arranged at the position of the lower plastic part corresponding to the hollow part, and the projection of the bonding member on the end plate can cover the liquid passing hole. Thus, when the battery shakes, the bonding member can play a role in stabilizing the electrolyte to a certain extent, and further can eliminate the impact of the electrolyte on the explosion-proof valve to a certain extent, ensuring the use safety and service life of the explosion-proof valve, and at the same time improving the stability and service life of the battery.

[0018] In addition, the present utility model also provides a battery including the above-mentioned capping assembly.

[0019] For the battery adopting the capping assembly provided by the present application, since the explosion-proof valve of the capping assembly can avoid being impacted by the electrolyte during shaking, the battery can obtain higher stability and service life. Description of the Drawings

[0020] To more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 Schematic assembly diagram of the bonding part of the cover assembly and the lower plastic part provided by the embodiment of the present utility model;

[0022] Figure 2 Exploded view of the cover assembly provided by the embodiment of the present utility model.

[0023] In the figure: 1 - cover plate; 101 - explosion-proof valve; 2 - lower plastic part; 201 - hollow part; 3 - bonding part; 4 - end cover; 401 - accommodating part; 402 - liquid passing hole;

[0024] S1 - first direction; S2 - second direction. Specific embodiments

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all of them. Usually, the components of the embodiments of the present application 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 present application to be protected, but only represents the selected embodiments of the present application. Based on the embodiments of 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.

[0026] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, or the orientation or positional relationships in which the utility model product is usually placed when in use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0027] In addition, terms such as "horizontal" and "vertical" do not require that components be absolutely horizontal or hanging vertically, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly inclined.

[0028] In the description of the embodiments of the present application, it should also be noted that, unless otherwise clearly specified and limited, the terms "arranged", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0029] As used herein, the term "and / or" includes any one of the listed related items and any combination of any two or more of them.

[0030] For ease of description, spatial relationship terms such as "above...", "upper", "below...", and "lower" may be used herein to describe the relationship between one element and another as shown in the drawings. Such spatial relationship terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the drawings.

[0031] The terms used herein are only for describing various examples and are not intended to limit the present disclosure. Unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. The terms "comprises", "comprising", and "having" list the stated features, quantities, operations, components, elements, and / or combinations thereof that exist, but do not preclude the existence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0032] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings, but include changes in shape that occur during manufacturing.

[0033] The features of the examples described herein can 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, as will be apparent after understanding the disclosure of the present application, other configurations are possible. Additionally, the technical solutions between the various embodiments can be combined with each other, but it must be based on what can be achieved by those of ordinary skill in the art. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0034] As Figure 1 shown, the present utility model provides a capping assembly, which includes a cover plate 1, a lower plastic part 2, an adhesive part 3 and an end plate. An explosion-proof valve 101 is installed on the cover plate 1. A hollow part 201 is formed at the position of the lower plastic part 2 corresponding to the explosion-proof valve 101. A liquid passing hole 402 is formed on the end plate, and the liquid passing hole 402 is arranged corresponding to the hollow part 201. The adhesive part 3 is adhesively connected to the lower plastic part 2, and the projection of the adhesive part 3 covers the liquid passing hole 402.

[0035] Compared with the prior art, the capping assembly provided by the present utility model has the following advantages:

[0036] For the capping assembly provided by the present utility model, the lower plastic part 2 is connected to the end plate, and the lower plastic part 2 can protect the battery core and provide a basis for positioning the core. Since the explosion-proof valve 101 on the cover plate 1 needs to communicate with the internal cavity of the battery to relieve pressure in time when the internal pressure is too high, therefore, a liquid passing hole 402 is formed on the end plate of the present application to facilitate the passage of gas. Correspondingly, by forming a hollow part 201 at the position of the lower plastic part 2 corresponding to the explosion-proof valve 101, and the hollow part 201 is also arranged corresponding to the liquid passing hole 402, thus, the gas can directly pass through the liquid passing hole 402 and the hollow part 201 to trigger the explosion-proof valve 101, achieving the purpose of relieving pressure and protecting the battery.

[0037] Moreover, since the electrolyte will also pass through the liquid passing hole 402 and the hollow part 201 to contact the explosion-proof valve 101 while the gas passes through, and when the battery shakes, the electrolyte will continuously impact the explosion-proof valve 101. Therefore, in the present application, an adhesive part 3 is further arranged at the position of the lower plastic part 2 corresponding to the hollow part 201, and the projection of the adhesive part 3 on the end plate can cover the liquid passing hole 402. Thus, when the battery shakes, the adhesive part 3 can play a role in stabilizing the electrolyte to a certain extent, and further can eliminate the impact of the electrolyte on the explosion-proof valve 101 to a certain extent, ensuring the use safety and service life of the explosion-proof valve 101, and at the same time improving the stability and service life of the battery during use.

[0038] Optionally, as Figure 1 shown in combination with Figure 2 the above structure, the present application provides one of the implementation manners. In this implementation manner, there are multiple adhesive parts 3, and the multiple adhesive parts 3 are arranged at intervals on the lower plastic part 2 along the first direction S1, and each adhesive part 3 spans the hollow part 201 along the second direction S2.

[0039] It can be understood that the first direction S1 in the above application is the length direction of the lower plastic part 2, and the second direction S2 is the width direction of the lower plastic part 2. Since there are multiple liquid passing holes 402 in the present application and the multiple liquid passing holes 402 are arranged in an array, therefore, through multiple bonding members 3 arranged at intervals along the length direction of the lower plastic part 2, and each bonding member 3 spans the hollow part 201 along the width direction of the lower plastic part 2, it is possible to accurately cover the liquid passing holes 402 formed on the end cover 4, and further, through the bonding members 3, the problem that the electrolyte in the accommodating part 401 impacts the explosion-proof valve 101 can be avoided.

[0040] Preferably, the length of the bonding member 3 in the present application is greater than the width of the lower plastic part 2, so as to extend to the side part of the lower plastic part 2 to a certain extent and make the bonding more firm.

[0041] In another embodiment of the present application, there are multiple bonding members 3, the multiple bonding members 3 are arranged at intervals along the width direction of the lower plastic part 2, and each bonding member 3 spans the hollow part 201 along the length direction of the lower plastic part 2.

[0042] The difference between this embodiment and the previous embodiment lies in the different setting directions of the bonding members 3, that is, the setting direction of the bonding members 3 in this embodiment is perpendicular to the setting direction in the previous embodiment, but it can also cover the liquid passing holes 402 arranged in an array, so as to achieve the stable blocking of the electrolyte and avoid the impact of the electrolyte on the explosion-proof valve 101.

[0043] Correspondingly, in this way, the length of the bonding member 3 is greater than the length of the hollow part 201, so as to increase the bonding area with the lower plastic part 2 and improve the bonding stability.

[0044] Optionally, as Figure 2 shown, a accommodating part 401 is formed at the position of the end plate corresponding to the hollow part 201 in the present application, the lower plastic part 2 is connected to the end plate, and the liquid passing holes 402 and the hollow part 201 are both communicated with the accommodating part 401.

[0045] Through the formed accommodating part 401, after the end plate and the lower plastic part 2 are connected, the liquid passing holes 402 and the bonding members 3 can have a certain distance, so as to avoid the electrolyte in the battery directly impacting on the bonding members 3 from the liquid passing holes 402 to a certain extent. That is to say, by using the accommodating part 401, the impact force of the electrolyte can be reduced to a certain extent when the battery shakes, so as to improve the bonding stability of the bonding members 3 to a certain extent.

[0046] Preferably, the bonding member 3 in the present application is made of PE I, P I, PP, PE or PET material, and further preferably, the thickness of the bonding member 3 in the present application is 25μm - 150μm.

[0047] In addition, the present utility model further provides a battery, which includes the above-mentioned cover assembly.

[0048] For the battery adopting the cover assembly provided by the present application, since the explosion-proof valve 101 of the cover assembly can avoid being impacted by the electrolyte during shaking, therefore, the battery can obtain higher stability and service life.

[0049] 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, improvements, 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 cover assembly, characterized in that: It includes a cover plate, a lower plastic part, a bonding part and an end plate; An explosion-proof valve is installed on the cover plate, a hollow portion is formed on the lower plastic part at a position corresponding to the explosion-proof valve, and a liquid-passing hole is formed on the end plate, and the liquid-passing hole is arranged corresponding to the hollow portion; The adhesive component is bonded to the lower plastic component, and the projection of the adhesive component covers the liquid passage hole.

2. The cover assembly according to claim 1, characterized in that: There are a plurality of adhesive members, and the plurality of adhesive members are arranged at intervals on the lower plastic member along a first direction, and each of the adhesive members is arranged across the hollow portion along a second direction.

3. The cover assembly according to claim 2, characterized in that: The size of the adhesive component in the second direction is greater than the size of the lower plastic component in the second direction.

4. The cover assembly according to claim 1, wherein: There are a plurality of adhesive members, and the plurality of adhesive members are arranged at intervals on the lower plastic member along the second direction, and each of the adhesive members is arranged across the hollow portion along the first direction.

5. The cover assembly according to claim 4, characterized in that: A size of the adhesive member in the first direction is greater than a size of the hollow portion in the first direction.

6. The cover assembly according to claim 1, wherein: There are a plurality of liquid passage holes, and the plurality of liquid passage holes are distributed in a matrix.

7. The cover assembly according to claim 1, characterized in that: The end plate is formed with a receiving portion at a position corresponding to the hollow portion, the lower plastic part is connected to the end plate, and the liquid passage hole and the hollow portion are both in communication with the receiving portion.

8. The cover assembly according to claim 1, wherein: The adhesive member is made of PEI, PI, PP, PE or PET material.

9. The cover assembly according to claim 1, wherein: The thickness of the adhesive member is 25 μm-150 μm.

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

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