Battery cover plate assembly and single battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery cover plate assembly and a single battery. The battery cover plate assembly comprises a cover plate body, a lower plastic part, an electrode assembly and a heat insulation part, the lower plastic part is arranged on one side of the cover plate body, the electrode assembly is arranged on the cover plate body in a sealed and insulated mode, and the heat insulation part is arranged on the side, away from the cover plate body, of the lower plastic part. The heat insulation part is used for weakening heat conduction between the cover plate body and the battery cell and between the electrode assembly and the battery cell; according to the battery cover plate assembly, the heat insulation part is arranged on the electrode assembly, so that when the electrode assembly generates heat, the heat can be blocked by the heat insulation part to reduce heat transfer to the battery cell, thereby reducing the influence of the heat of the battery cover plate assembly on the battery cell, improving the reliability of the battery cover plate assembly, ensuring the performance of a single battery provided with the battery cover plate assembly, and slowing down the attenuation speed of the performance.

Description

Technical Field

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

[0002] With the rapid development of new energy vehicles, power batteries, as the power source of new energy vehicles, are one of the key components of new energy vehicles.

[0003] Existing power batteries include a battery cover, which comprises a cover body, a lower plastic, and an electrode assembly. The lower plastic is used to insulate the top cover from the interior of the power battery, and the electrode assembly is used to conduct electricity. During operation, the internal electrochemical reaction transfers electricity through the adapter to the electrode assembly for output, thereby achieving electrical transfer within the power battery. During this process, the electrode assembly in the battery cover generates a large amount of heat, causing the entire top cover to be heated. However, the efficiency of heat exchange with the external cooling device cannot meet the heat generation rate, causing some heat to enter the battery interior, causing the electrolyte within the battery to generate more gas, thereby increasing the internal resistance of the battery and reducing battery performance.

[0004] Therefore, there is an urgent need for a battery cover assembly and a single battery to solve the above technical problems. Utility Model Content

[0005] One purpose of the present utility model is to provide a battery cover assembly, which can weaken the heat conduction between the cover body and the electrode assembly and the battery cell respectively, thereby improving the stability of the battery cell performance.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] The battery cover assembly includes a cover body, a lower plastic part, an electrode assembly and a thermal insulation part, wherein the lower plastic part is arranged on one side of the cover body, the electrode assembly is sealed and insulated and arranged on the cover body, and the thermal insulation part is arranged on the side of the lower plastic part away from the cover body. The thermal insulation part is used to weaken the heat conduction between the cover body and the electrode assembly and the battery cell respectively.

[0008] Optionally, the heat insulating member is provided with one side of the heat insulating member being hingedly connected to the same side of the lower plastic member, and the other side being detachably connected to the lower plastic member; or

[0009] There are two thermal insulation members, one side of the two thermal insulation members is hingedly connected to the two sides of the lower plastic member, and the other side of the two thermal insulation members is detachably connected to the lower plastic member.

[0010] Optionally, the heat insulating member is provided with a vent hole, and the vent hole is provided corresponding to the explosion-proof valve on the cover body to form an exhaust passage; or,

[0011] There are two thermal insulation members, and a gap is provided between the two thermal insulation members. The gap is provided corresponding to the explosion-proof valve to form an exhaust passage.

[0012] Optionally, the other side of the thermal insulation component is snap-connected to the lower plastic component.

[0013] Optionally, a slot is provided on the other side of the heat insulating component and one of the lower plastic component, and a buckle is provided on the other side, and the buckle is snap-connected to the slot.

[0014] Optionally, one side of the thermal insulation component is connected to the lower plastic component via a pin so that the two are hingedly connected.

[0015] Optionally, the heat insulating component is provided with an avoidance hole, and the avoidance hole is provided correspondingly to the injection hole on the cover body.

[0016] Optionally, the heat insulating member and the lower plastic member are spaced apart to form a placement groove, and the placement groove is used to install the adapter plate of the battery cell.

[0017] Optionally, from one side where the heat insulating member is hinged to the lower plastic member to the other side, the heat insulating member is arranged away from the lower plastic member.

[0018] Another object of the present invention is to provide a single battery, which includes the battery cover assembly described in any of the above solutions.

[0019] Beneficial effects of the utility model:

[0020] The utility model provides a battery cover assembly and a single cell, in which a heat insulating member is arranged on the side of the lower plastic member facing away from the cover body, that is, a heat insulating member is arranged on the side of the battery cover assembly facing the battery cell in the shell of the single cell, so that when the electrode assembly generates heat, the heat will be blocked by the heat insulating member to reduce heat transfer to the battery cell, thereby reducing the influence of the heat of the battery cover assembly on the battery cell, improving the reliability of the battery cover assembly, ensuring the performance of the single cell installed with the battery cover assembly, and slowing down the decay rate of its performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an axonometric view of a battery cover assembly provided by a specific embodiment of the present invention from one perspective;

[0022] Figure 2 This is an axonometric view of the battery cover assembly provided by the specific embodiment of the utility model from another perspective;

[0023] Figure 3 This is an axonometric view of the battery cover assembly in the expanded state provided by a specific embodiment of the present utility model;

[0024] Figure 4 This is a front view of the battery cover assembly in the expanded state provided by a specific embodiment of the utility model;

[0025] Figure 5 It is a cross-sectional view of a battery cover assembly provided by a specific embodiment of the present utility model;

[0026] Figure 6 This Figure 5 A partial enlarged view of point A in the middle.

[0027] In the picture:

[0028] 10. Cover plate; 11. Explosion-proof valve; 12. Liquid injection hole;

[0029] 20. Lower plastic part; 21. Card slot;

[0030] 30. Electrode assembly; 31. Electrode column; 32. Rubber coating; 33. Seal;

[0031] 40. Thermal insulation; 41. Gap; 42. Buckle; 43. Avoidance hole;

[0032] 50. Pin; 60. Mounting slot. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0034] In the description of this utility model, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; they may refer to direct connection or indirect connection through an intermediate medium; they may refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0035] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, the terms "upper," "lower," "left," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0037] This embodiment provides a battery cover assembly to reduce the impact of heat from the battery cover assembly on cells within a single battery.

[0038] Please refer to Figure 1 and Figure 2 Specifically, the battery cover assembly includes a cover body 10, a lower plastic part 20, an electrode assembly 30 and a thermal insulation member 40, wherein the lower plastic part 20 is arranged on one side of the cover body 10, the electrode assembly 30 is sealed and insulated and arranged on the cover body 10, and the thermal insulation member 40 is arranged on the side of the lower plastic part 20 away from the cover body 10. The thermal insulation member 40 is used to weaken the heat conduction between the cover body 10 and the electrode assembly 30 and the battery cell respectively.

[0039] The battery cover assembly in this embodiment is provided with a heat insulating member 40 on the side of the lower plastic member 20 facing away from the cover body 10, that is, a heat insulating member 40 is provided on the side of the battery cover assembly facing the battery cell in the shell of the single battery. When the electrode assembly 30 generates heat, the heat will be blocked by the heat insulating member 40 to reduce heat transfer to the battery cell, thereby reducing the impact of the heat of the battery cover assembly on the battery cell, improving the reliability of the battery cover assembly, and ensuring the performance of the single battery installed with the battery cover assembly, slowing down the decay rate of its performance.

[0040] In some embodiments, the thermal insulation member 40 and the lower plastic member 20 are detachably connected, so that the electrode assembly 30 can be welded and fixed to the tab of the battery cell before the thermal insulation member 40 is installed. This facilitates the thermal insulation member 40 to block the heat of the adapter between the electrode assembly 30 and the battery cell, so that most of the heat can be transferred to the cover body 10 through the thermal insulation member 40 and dissipated, reducing the heat transfer of the adapter and thus improving the stability of the battery cell performance.

[0041] Optionally, the heat insulating member 40 and the lower plastic member 20 are connected by a snap 42 connection, riveting or bonding, etc., and only needs to ensure a detachable connection between the two.

[0042] Please refer to Figures 1 to 4 Specifically, the heat insulating member 40 and the lower plastic member 20 in this embodiment are hinged on one side and detachably connected on the other side, so that the two will not separate, but can also meet the requirements of welding and fixing the electrode assembly 30 to the tab of the battery cell.

[0043] In some optional embodiments, the thermal insulation member 40 is provided with one side of the thermal insulation member 40 being hingedly connected to the same side of the lower plastic member 20, and the other side being detachably connected to the lower plastic member 20, thereby realizing the flippability of the thermal insulation member 40 and the fixed connection between the thermal insulation member 40 and the lower plastic member 20.

[0044] In some optional embodiments, two thermal insulation members 40 are provided, one side of the two thermal insulation members 40 is hingedly connected to the two sides of the lower plastic member 20, and the other sides of the two thermal insulation members 40 are detachably connected to the lower plastic member 20, thereby realizing the flippability of the thermal insulation member 40 and the fixed connection between the thermal insulation member 40 and the lower plastic member 20.

[0045] Specifically, one side of the heat insulating member 40 is connected to the lower plastic member 20 via a pin 50 so that the two are hingedly connected.

[0046] Furthermore, the other side of the heat insulating member 40 is snap-connected with the lower plastic member 20 to achieve a detachable connection between the two.

[0047] Please refer to Figure 5 and Figure 6 More specifically, one of the other side of the heat insulating member 40 and the lower plastic member 20 is provided with a slot 21, and the other side is provided with a buckle 42. The buckle 42 is snap-connected to the slot 21, thereby achieving a snap connection between the two. For example, in this embodiment, the heat insulating member 40 is provided with a buckle 42, and the lower plastic member 20 is provided with a slot 21.

[0048] Since the cover plate body 10 is provided with an explosion-proof valve 11 , the explosion-proof valve 11 is used to achieve a pressure relief protection function for the single battery, thereby improving the safety of the single battery.

[0049] In order to enable the explosion-proof valve 11 to achieve the explosion-proof pressure relief function, in some embodiments, the thermal insulation component 40 is further provided with an exhaust channel, and the exhaust channel is connected to the explosion-proof valve 11, so that the explosion-proof valve 11 is connected to the internal gas path of the single battery.

[0050] In some optional embodiments, the heat insulation member 40 is provided with an exhaust hole, which is arranged corresponding to the explosion-proof valve 11 on the cover body 10 to form an exhaust channel; thereby achieving air communication between the explosion-proof valve 11 and the inside of the single battery shell.

[0051] Please refer to Figure 2 In some optional embodiments, two thermal insulation members 40 are provided, and a gap 41 is provided between the two thermal insulation members 40. The gap 41 is provided corresponding to the explosion-proof valve 11 to form an exhaust channel; thereby achieving gas communication between the explosion-proof valve 11 and the inside of the single battery shell.

[0052] The cover body 10 is further provided with a liquid injection hole 12 for injecting electrolyte into the single battery.

[0053] In order to avoid a decrease in the injection rate, in some embodiments, the thermal insulation member 40 is provided with an avoidance hole 43, which is arranged corresponding to the injection hole 12 on the cover body 10, so that the electrolyte can flow into the single cell more smoothly through the injection hole 12 and the avoidance hole 43.

[0054] Please refer to Figure 6 In some embodiments, the thermal insulation member 40 is spaced apart from the lower plastic member 20 to form a placement groove 60, which is used to install the adapter of the battery cell, so that the thermal insulation member 40 can better achieve the heat blocking effect, reduce the heat conducted to the battery cell through the cover body 10, the lower plastic member 20 and the adapter, and improve the stability of the battery cell performance.

[0055] In some embodiments, the thermal insulation member 40 is arranged away from the lower plastic member 20 from one side to the other side where the thermal insulation member 40 is hinged to the lower plastic member 20. This arrangement avoids the residence of structures such as electrolyte in the placement groove 60, thereby affecting the service life of the structure in contact with it, thereby improving the service life of the battery cover assembly.

[0056] In some embodiments, the electrode assembly 30 includes a pole 31, a rubber coating 32 and a seal 33. The pole 31 is passed through the battery cover and the lower plastic part 20. A rubber coating 32 is provided between the outer periphery of the top of the pole 31 and the cover body 10. The seal 33 is provided between the outer periphery of the other part of the pole 31 and the cover body 10 to achieve sealing and insulation between the two.

[0057] It is understandable that there may be one or two electrode assemblies 30 on the battery cover assembly, which is set according to actual needs and is not specifically limited here.

[0058] This embodiment further provides a single battery, which includes the battery cover assembly described in any of the above solutions. The single battery has the beneficial effects of the top cover assembly described in any of the above solutions, which will not be described in detail here.

[0059] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Battery cover assembly, characterized in that: The invention comprises a cover body (10), a lower plastic part (20), an electrode assembly (30) and a heat insulating part (40), wherein the lower plastic part (20) is arranged on one side of the cover body (10), the electrode assembly (30) is sealed and insulated and arranged on the cover body (10), and the heat insulating part (40) is arranged on the side of the lower plastic part (20) facing away from the cover body (10), and the heat insulating part (40) is used to weaken the heat conduction between the cover body (10) and the electrode assembly (30) and the battery cell respectively.

2. The battery cover assembly according to claim 1, characterized in that: The heat insulating member (40) is provided with one side of the heat insulating member (40) being hingedly connected to the same side of the lower plastic member (20), and the other side being detachably connected to the lower plastic member (20); or Two heat insulating members (40) are provided, one side of the two heat insulating members (40) is hingedly connected to the two sides of the lower plastic member (20), and the other side of the two heat insulating members (40) is detachably connected to the lower plastic member (20).

3. The battery cover assembly according to claim 2, characterized in that: The heat insulating member (40) is provided with an exhaust hole, and the exhaust hole is arranged corresponding to the explosion-proof valve (11) on the cover body (10) to form an exhaust channel; or, Two heat insulating members (40) are provided, a gap (41) is provided between the two heat insulating members (40), and the gap (41) is provided corresponding to the explosion-proof valve (11) to form an exhaust passage.

4. The battery cover assembly according to claim 2, characterized in that: The other side of the heat insulating component (40) is snap-connected to the lower plastic component (20).

5. The battery cover assembly according to claim 4, characterized in that: The other side of the heat insulating member (40) and one of the lower plastic member (20) are provided with a card slot (21), and the other is provided with a buckle (42), and the buckle (42) is snap-connected to the card slot (21).

6. The battery cover assembly according to claim 1, characterized in that: One side of the heat insulating component (40) is connected to the lower plastic component (20) via a pin (50) so that the two are hingedly connected.

7. The battery cover assembly according to claim 1, characterized in that: The heat insulating member (40) is provided with an avoidance hole (43), and the avoidance hole (43) is arranged corresponding to the liquid injection hole (12) on the cover plate body (10).

8. The battery cover assembly according to claim 1, characterized in that: The heat insulating member (40) and the lower plastic member (20) are spaced apart to form a placement groove (60), and the placement groove (60) is used to install the adapter plate of the battery core.

9. The battery cover assembly according to any one of claims 1 to 8, characterized in that: From one side of the hinged connection between the heat insulating member (40) and the lower plastic member (20) to the other side, the heat insulating member (40) is arranged away from the lower plastic member (20).

10. A single cell battery, characterized in that: The invention comprises a battery cover assembly as claimed in any one of claims 1 to 9.

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