Battery top cover assembly and battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery top cover assembly and a battery. According to the battery top cover assembly, the pole is arranged on the side, away from the battery cell, of the top cover piece, and the pole is fixed on the top cover piece through the first insulating part, so that the space occupied by the pole in the battery shell is effectively reduced, the battery structure can be optimized to the maximum extent through the design, and the volume energy density and the weight energy density of the battery are improved; therefore, the battery can store more energy in the same volume, and the performance of the battery in the fields of electric automobiles and the like can be improved. Moreover, the arrangement of the first insulating part effectively isolates the pole and the top cover plate, reduces the occurrence probability of short circuit and other safety risks, and improves the overall safety of the battery.

Description

Technical Field

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

[0002] With the vigorous development of the new energy industry, the improvement of the technology level of new energy batteries as one of the key components is crucial to the sustainable development of electric vehicles, energy storage systems and other fields. At present, as one of the mainstream batteries, the energy development of lithium batteries has gradually approached the limit, so innovation in battery structure has become an important way to improve volume energy density, weight energy density and reduce costs.

[0003] Existing lithium batteries are usually provided with poles on the top cover, and the poles are insulated from the top cover by applying plastic. However, the poles run through the top cover, and a part of the poles occupies the space inside the battery casing, reducing the volume energy density of the battery.

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

[0005] The utility model aims to provide a battery top cover assembly, which effectively reduces the space occupied by the pole inside the battery shell, optimizes the battery structure, and improves the volume energy density and weight energy density of the battery.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Battery top cover assembly, including:

[0008] Top cover piece;

[0009] A pole, arranged on a side of the top cover sheet facing away from the battery cell;

[0010] A first insulating member is used to fix the pole on the top cover sheet and to isolate the pole from the top cover sheet.

[0011] Optionally, a first glue potting groove is provided on a side of the top cover sheet facing away from the battery core, and the first insulating member includes an insulating portion, the insulating portion is located between the pole and the top cover sheet, and the insulating portion is embedded in the first glue potting groove.

[0012] Optionally, at least one first through hole is provided at the bottom of the first glue potting groove, and a second through hole is provided on the pole corresponding to the first through hole. The first insulating member also includes a first limiting portion, a penetration portion and a second limiting portion. The first limiting portion is pressed against the pole, and the second limiting portion is pressed against a side of the top cover sheet close to the battery cell. One end of the penetration portion is connected to the first limiting portion, and the other end is penetrated by the second through hole in sequence, and the first through hole is connected to the second limiting portion.

[0013] Optionally, the pole includes a flange portion and a column portion, the column portion is arranged on the flange portion, the second through hole is opened on the flange portion, and the column portion is electrically connected to the battery cell.

[0014] Optionally, a second glue potting groove is provided on a side of the top cover sheet facing away from the pole, and the first insulating member includes a second limiting portion, and the second limiting portion is embedded in the second glue potting groove.

[0015] Optionally, the battery top cover assembly further includes a first sealing ring, and the first sealing ring is used to seal the connection between the pole and the top cover sheet.

[0016] Optionally, a first assembly hole is provided on the bottom wall of the first glue pouring groove, the first sealing ring comprises a sealing ring body and a first annular protrusion, the sealing ring body is located between the pole and the top cover sheet, and the first annular protrusion is embedded in the first assembly hole.

[0017] Optionally, the battery top cover assembly further includes a second insulating member, and the second insulating member is arranged on a side of the top cover sheet facing the battery cell.

[0018] Optionally, a second annular protrusion is provided on the second insulating member, the second annular protrusion is embedded in the first assembly hole, and the first annular protrusion is provided between the second annular protrusion and a hole wall of the first assembly hole.

[0019] Optionally, the first insulating member and the second insulating member are both made of plastic.

[0020] Optionally, the top cover sheet is a plain aluminum sheet.

[0021] Another object of the utility model is to provide a battery, which includes the above-mentioned battery top cover assembly, which improves the volume energy density and weight energy density of the battery, enables the battery to store more energy in the same volume, and is beneficial to improving the performance of the battery in the fields of electric vehicles.

[0022] To achieve this purpose, the utility model adopts the following technical solutions:

[0023] A battery, comprising the above-mentioned battery top cover assembly.

[0024] Beneficial effects:

[0025] The battery top cover assembly provided by the utility model effectively reduces the space occupied by the pole inside the battery housing by setting the pole on the side of the top cover sheet away from the battery cell and fixing the pole on the top cover sheet by using the first insulating member. Such a design can optimize the battery structure to the maximum extent, improve the volume energy density and weight energy density of the battery, and enable the battery to store more energy in the same volume, which is conducive to improving the performance of the battery in the fields of electric vehicles, etc. In addition, the setting of the first insulating member effectively isolates the pole from the top cover sheet, reduces the probability of short circuit and other safety risks, and improves the overall safety of the battery.

[0026] The battery provided by the utility model includes the above-mentioned battery top cover assembly, which improves the volume energy density and weight energy density of the battery, so that the battery can store more energy in the same volume, which is beneficial to improving the performance of the battery in the fields of electric vehicles and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is an exploded view of the battery top cover assembly provided by the utility model;

[0028] Figure 2 It is a cross-sectional view of the battery top cover assembly provided by the utility model;

[0029] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0030] Figure 4 It is a schematic diagram of the structure of the pole provided by the utility model;

[0031] Figure 5 yes Figure 4 Cross-sectional view at BB in the middle.

[0032] In the figure:

[0033] 100, top cover sheet; 110, first glue pouring trough; 111, first through hole; 112, first assembly hole; 120, second glue pouring trough;

[0034] 200, pole; 210, column portion; 220, flange portion; 221, second through hole;

[0035] 300, first insulating member; 310, isolating portion; 320, first limiting portion; 330, penetrating portion; 340, second limiting portion;

[0036] 400, first sealing ring; 410, sealing ring body; 420, first annular protrusion;

[0037] 500, a second insulating member; 510, a second annular protrusion;

[0038] 600, explosion-proof valve; 610, second sealing ring; 620, protective diaphragm;

[0039] 700. Liquid injection hole. DETAILED DESCRIPTION

[0040] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0041] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0043] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0044] This embodiment provides a battery top cover assembly, such as Figure 1-Figure 5As shown, the battery top cover assembly includes a top cover sheet 100, a pole 200 and a first insulating member 300. The pole 200 is arranged on the side of the top cover sheet 100 away from the battery cell. The first insulating member 300 is used to fix the pole 200 on the top cover sheet 100 and isolate the pole 200 from the top cover sheet 100 to play an insulating role.

[0045] The battery top cover assembly effectively reduces the space occupied by the pole 200 inside the battery housing by setting the pole 200 on the side of the top cover sheet 100 away from the battery cell, and fixing the pole 200 on the top cover sheet 100 using the first insulating member 300. Such a design can optimize the battery structure to the maximum extent, improve the volume energy density and weight energy density of the battery, and enable the battery to store more energy in the same volume, which is conducive to improving the performance of the battery in the fields of electric vehicles, etc. In addition, the setting of the first insulating member 300 effectively isolates the pole 200 from the top cover sheet 100, reduces the probability of short circuit and other safety risks, and improves the overall safety of the battery.

[0046] Alternatively, if Figure 1-Figure 3 As shown, a first glue pouring trough 110 is provided on the side of the top cover sheet 100 away from the battery cell, and the first insulating member 300 includes an insulating portion 310, the insulating portion 310 is located between the pole 200 and the top cover sheet 100, and the insulating portion 310 is embedded in the first glue pouring trough 110. The insulating portion 310 is embedded in the first glue pouring trough 110, which helps to ensure a firm connection of the insulating portion 310, and effectively reduces the potential air gap or looseness between the pole 200 and the top cover sheet 100, reduces the potential risk of battery short circuit, further improves the insulation effect, and improves the structural stability and durability of the battery.

[0047] Optionally, at least one first through hole 111 is provided at the bottom of the first glue-filling sink 110, and a second through hole 221 is provided on the pole 200 corresponding to the first through hole 111. The first insulating member 300 also includes a first limiting portion 320, a penetration portion 330 and a second limiting portion 340. The first limiting portion 320 is pressed against the pole 200, and the second limiting portion 340 is pressed against a side of the top cover sheet 100 close to the battery cell. One end of the penetration portion 330 is connected to the first limiting portion 320, and the other end is penetrated by the second through hole 221, the first through hole 111 and the second limiting portion 340 in sequence, so that the pole 200 is firmly fixed on the top cover sheet 100, thereby improving the overall stability of the battery top cover assembly and improving the reliability of the battery.

[0048] Alternatively, if Figure 3-Figure 5As shown, the pole 200 includes a flange portion 220 and a column portion 210, the column portion 210 is arranged on the flange portion 220, the second through hole 221 is opened on the flange portion 220, and the column portion 210 is electrically connected to the battery cell. The design of the flange portion 220 and the column portion 210 strengthens the structural stability of the pole 200, helps prevent the pole 200 from deformation or loosening, and improves the mechanical strength and vibration resistance of the battery top cover assembly.

[0049] Optionally, a second glue potting groove 120 is provided on the side of the top cover sheet 100 away from the pole 200, and the first insulating member 300 includes a second limiting portion 340, which is embedded in the second glue potting groove 120, which can further increase the internal volume of the battery and make the first seal more stable.

[0050] Optionally, the battery top cover assembly also includes a first sealing ring 400, which is used to seal the connection between the pole 200 and the top cover sheet 100. The provision of the first sealing ring 400 helps to form an effective seal at the connection between the pole 200 and the top cover sheet 100, so as to prevent the liquid (e.g., electrolyte) inside the battery from penetrating into the connection between the pole 200 and the top cover sheet 100, thereby reducing the risk of short circuit or damage to the battery and improving the safety and stability of the battery. The battery may be affected by various environmental factors during use, including humidity and chemicals. The first sealing ring 400 can effectively prevent moisture and corrosive substances from entering the connection between the pole 200 and the top cover sheet 100, thereby extending the service life of the battery. Therefore, through the sealing effect of the first sealing ring 400, the internal environment of the battery can be maintained relatively closed and stable, which helps to keep the battery working normally, reduce the impact of the external environment on the battery performance, and improve the reliability of the battery.

[0051] Optionally, the bottom wall of the first glue pouring trough 110 is provided with a first assembly hole 112, and the first sealing ring 400 includes a sealing ring body 410 and a first annular protrusion 420, the sealing ring body 410 is located between the pole 200 and the top cover sheet 100, and the first annular protrusion 420 is embedded in the first assembly hole 112. The introduction of the first assembly hole 112 enables the first sealing ring 400 to be more firmly embedded in the first glue pouring trough 110, which helps to maintain the position of the first sealing ring 400 in the battery top cover assembly, enhances its sealing performance at the connection between the pole 200 and the top cover sheet 100, and improves the stability and reliability of the battery top cover assembly.

[0052] Optionally, the battery top cover assembly further includes a second insulating member 500, which is disposed on the side of the top cover sheet 100 facing the battery cell. The second insulating member 500 is disposed on the side facing the battery cell, which increases the insulating layer of the battery structure, avoids direct contact between the battery cell and the top cover sheet 100, and improves the overall insulation effect of the battery. The second insulating member 500 provides additional support and isolation on the side of the top cover sheet 100 facing the battery cell, which helps prevent structural loosening or deformation caused by external vibration or impact. Therefore, the addition of the second insulating member 500 can enhance the mechanical stability of the battery top cover assembly.

[0053] Alternatively, if Figure 3 As shown, the second insulating member 500 is provided with a second annular protrusion 510, which is embedded in the first assembly hole 112, and a first annular protrusion 420 is provided between the second annular protrusion 510 and the hole wall of the assembly hole. The second annular protrusion 510 is embedded in the first assembly hole 112, so that the second insulating member 500 is more closely connected to the top cover sheet 100. At the same time, the first annular protrusion 420 is provided between the second annular protrusion 510 and the hole wall of the assembly hole, forming a more complete sealing structure, further improving the sealing effect of the battery top cover assembly, and reducing the risk of liquid or gas penetration. In addition, through the embedded structure of the first assembly hole 112 and the second annular protrusion 510, the assembly process can be simplified and the production efficiency can be improved.

[0054] Optionally, the first insulating member 300 and the second insulating member 500 are both made of plastic. Plastic is relatively light, so using plastic to make the first and second insulating members 500 helps to reduce the overall weight of the battery assembly. Plastic is a relatively cheap material, and using plastic to make insulating members can reduce manufacturing costs. In addition, plastic has good insulation properties and helps to provide effective electrical isolation in the battery assembly. This is crucial to ensure the safety and performance of the battery.

[0055] Optionally, the top cover sheet 100 is a plain aluminum sheet. Plain aluminum sheets are relatively light and have high strength, which helps to reduce the overall weight of the battery assembly and improve the strength and stability of the battery. Plain aluminum sheets have strong corrosion resistance and can maintain good performance in an environment with high humidity.

[0056] Optionally, the battery top cover assembly further includes an explosion-proof valve 600, which is disposed on the bare aluminum sheet. When the internal pressure of the battery increases abnormally, the explosion-proof valve 600 can quickly release gas to prevent the battery from exploding or leaking, thereby improving the overall safety of the battery.

[0057] Optionally, a second sealing ring 610 is provided between the explosion-proof valve 600 and the second insulating member 500. The introduction of the second sealing ring 610 helps to form a tighter seal at the connection between the explosion-proof valve 600 and the second insulating member 500, thereby improving the sealing performance of the battery.

[0058] Optionally, a protective diaphragm 620 is provided on the side of the explosion-proof valve 600 away from the battery cell. The presence of the protective diaphragm 620 can effectively prevent dust, dirt, or other impurities from entering the explosion-proof valve 600 area, which helps to maintain the normal working state of the explosion-proof valve 600 and prevent external pollutants from affecting the explosion-proof valve 600. As an additional protective layer, the protective diaphragm 620 helps to protect the explosion-proof valve 600 from external impact or collision with objects, thereby improving the durability and reliability of the explosion-proof valve 600 in harsh environments.

[0059] Optionally, the battery top cover assembly further includes a liquid injection hole 700, which is provided on the plain aluminum sheet. The electrolyte can be injected into the battery through the liquid injection hole 700 to maintain the normal operation of the battery.

[0060] Optionally, in order to facilitate the understanding of the assembly process, the first insulating member 300 is defined as the upper plastic, and the second insulating member 500 is defined as the lower plastic. The assembly process of the battery top cover assembly provided in this embodiment is as follows:

[0061] After placing the lower plastic, the bare aluminum sheet, and the first sealing ring 400, place the pole 200 upward and compress it. After the first sealing ring 400 is compressed to a ratio of 15% to 45%, it is kept fixed. At this time, the liquid upper plastic is injected. The liquid upper plastic flows through the second through hole 221 on the pole 200 and the first through hole 111 of the bare aluminum sheet to fill the second glue pouring groove 120 on the bare aluminum sheet, the first glue pouring groove 110 (the gap between the pole 200 and the bare aluminum sheet), and the top of the pole 200. After cooling, an integral structure is formed, which fixes the pole 200 and isolates the pole 200 from the bare aluminum sheet.

[0062] Optionally, in this embodiment, four first through holes 111 are provided on the bottom wall of the first glue pouring trough 110, and four second through holes 221 are provided on the flange portion 220 of the pole 200, and each second through hole 221 corresponds to a first through hole 111, which can increase the pouring speed of the liquid plastic. At the same time, after the liquid plastic is cooled and solidified, the stability and structural strength of the battery top cover assembly are greatly improved.

[0063] Optionally, the pole 200 includes a positive pole 200 and a negative pole 200, and both the positive pole 200 and the negative pole 200 are fixed on the bare aluminum sheet using the above-mentioned fixing method, and the specific fixing process is not repeated. It should be noted that in this embodiment, the positive pole 200 is made by cold heading process, and the negative pole 200 is made by solid-liquid composite cold rolling process, which can effectively save materials and reduce processing costs.

[0064] This embodiment also provides a battery, which includes the above-mentioned battery top cover assembly, which improves the volume energy density and weight energy density of the battery, enables the battery to store more energy in the same volume, and is beneficial to improving the performance of the battery in the fields of electric vehicles.

[0065] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A battery top cover assembly, characterized in that: include: Top cover sheet (100); The pole (200) is arranged on a side of the top cover sheet (100) away from the battery cell, and a second glue pouring sink (120) is provided on the side of the top cover sheet (100) away from the pole (200); A first insulating member (300), wherein the first insulating member (300) comprises a second limiting portion (340), wherein the second limiting portion (340) is embedded in the second glue potting groove (120), and the first insulating member (300) is used to fix the pole (200) on the top cover sheet (100) and isolate the pole (200) from the top cover sheet (100).

2. The battery top cover assembly according to claim 1, characterized in that: A first glue pouring groove (110) is provided on a side of the top cover sheet (100) facing away from the battery core, and the first insulating member (300) comprises an insulating portion (310), the insulating portion (310) is located between the pole (200) and the top cover sheet (100), and the insulating portion (310) is embedded in the first glue pouring groove (110).

3. The battery top cover assembly according to claim 2, characterized in that: At least one first through hole (111) is provided at the bottom of the first glue-filling sink (110); a second through hole (221) is provided on the pole (200) corresponding to the first through hole (111); the first insulating member (300) further comprises a first limiting portion (320), a penetration portion (330) and a second limiting portion (340); the first limiting portion (320) is pressed against the pole (200); the second limiting portion (340) is pressed against a side of the top cover sheet (100) close to the battery cell; one end of the penetration portion (330) is connected to the first limiting portion (320); and the other end of the penetration portion (330) is sequentially penetrated by the second through hole (221), the first through hole (111) and connected to the second limiting portion (340).

4. The battery top cover assembly according to claim 3, characterized in that: The pole (200) comprises a flange portion (220) and a column portion (210), the column portion (210) is arranged on the flange portion (220), the second through hole (221) is opened on the flange portion (220), and the column portion (210) is electrically connected to the battery cell.

5. The battery top cover assembly according to claim 2, characterized in that: The battery top cover assembly also includes a first sealing ring (400), and the first sealing ring (400) is used to seal the connection between the pole (200) and the top cover sheet (100).

6. The battery top cover assembly according to claim 5, characterized in that: The bottom wall of the first glue-filling sink (110) is provided with a first assembly hole (112); the first sealing ring (400) comprises a sealing ring body (410) and a first annular protrusion (420); the sealing ring body (410) is located between the pole (200) and the top cover sheet (100); and the first annular protrusion (420) is embedded in the first assembly hole (112).

7. The battery top cover assembly according to claim 6, characterized in that: The battery top cover assembly further comprises a second insulating member (500), wherein the second insulating member (500) is arranged on a side of the top cover sheet (100) facing the battery cell.

8. The battery top cover assembly according to claim 7, characterized in that: The second insulating member (500) is provided with a second annular protrusion (510), the second annular protrusion (510) is embedded in the first assembly hole (112), and the first annular protrusion (420) is provided between the second annular protrusion (510) and the hole wall of the first assembly hole (112).

9. The battery top cover assembly according to claim 8, characterized in that: The first insulating member (300) and the second insulating member (500) are both made of plastic.

10. The battery top cover assembly according to claim 1, characterized in that: The top cover sheet (100) is a plain aluminum sheet.

11. A battery, characterized in that Comprising a battery top cover assembly as described in any one of claims 1-10.

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