CN218498211U - Top cover assembly and single battery - Google Patents

Abstract

The application discloses top cap subassembly and battery cell, wherein the top cap subassembly includes: top cap, utmost point post terminal, go up plastic and heat-conducting member. The pole terminal is connected to the top cover and protrudes out of one side of the top cover. The upper plastic rubber is provided with a mounting hole and is sleeved on the periphery of the pole terminal through the mounting hole. The heat conducting piece is arranged on the upper plastic, at least part of the heat conducting piece is exposed out of the upper plastic, and the heat conductivity coefficient of the heat conducting piece is larger than that of the upper plastic. Therefore, the heat conducting piece in the embodiment can rapidly lead out the temperature in the upper plastic to exchange heat with air, so that the upper plastic is rapidly cooled, and the pole terminal in contact with the upper plastic is rapidly cooled. Therefore, the temperature in the upper plastic can be quickly subjected to heat exchange with air through the heat conducting piece, so that the upper plastic can be quickly cooled, and therefore, only high insulativity is required to be ensured when the plastic is selected, the heat radiation performance is improved through the heat conducting piece, the material selection requirement is reduced, and the manufacturing cost is reduced.

Description

Top cover assembly and single battery

Technical Field

The application relates to the technical field of batteries, in particular to a top cover assembly and a single battery.

Background

Plastic usually can set up between the top cap of battery and the utmost point post terminal to realize the electrical isolation of top cap and utmost point post terminal, nevertheless along with lithium ion battery's continuous use, electrode terminal can heat up gradually, consequently, goes up the plastic and not only will insulate but also heat conduction and has proposed higher requirement, makes the material selection requirement of going up the plastic higher, improves manufacturing cost.

SUMMERY OF THE UTILITY MODEL

The present application is directed to solving at least one of the problems in the prior art. For this reason, this application provides a top cap subassembly, through the higher combination of going up plastic and the high heat-conducting member of coefficient of thermal conductivity of insulating coefficient for have better insulating nature between utmost point post terminal and the top cap, can dispel the heat fast simultaneously, reduce the selection material requirement of going up the plastic.

The application also provides a single battery comprising the top cover assembly.

A cap assembly according to an embodiment of the first aspect of the present application comprises:

a top cover;

the pole terminal is connected to the top cover and protrudes out of one side of the top cover;

the upper plastic is sleeved on the periphery of the pole terminal;

the heat conducting piece is arranged on the upper plastic, at least part of the heat conducting piece is exposed out of the upper plastic, and the heat conductivity coefficient of the heat conducting piece is larger than that of the upper plastic.

According to the top cap subassembly of this application embodiment, have following beneficial effect at least:

the coefficient of heat conduction of heat-conducting piece is greater than the coefficient of heat conduction of last plastic, and the heat-conducting piece is connected in last plastic to the plastic is partly exposed, consequently, goes up the temperature in the plastic and can carry out the heat exchange through heat-conducting piece fast and air, makes to go up the plastic and dispels the heat fast. The top cap subassembly of event this application can be through the combination of the higher last plastic of insulating coefficient and the high heat-conducting member of coefficient of thermal conductivity, can be so that to have better insulating nature between utmost point post terminal and the top cap, can also make utmost point post terminal dispel the heat fast to the selection material requirement of plastic is saved manufacturing cost in the reduction.

According to some embodiments of the present application, the heat conducting member is embedded in the upper plastic, and the heat conducting member is at least partially exposed from the upper plastic.

According to some embodiments of the application, go up the plastic and have the storage tank, and communicate the first opening of storage tank, just first opening is located go up the protrusion of plastic in the part of top cap, and be located go up the surface of plastic, the heat-conducting piece is located at least partially in the storage tank.

According to some embodiments of the application, the upper plastic further has a second opening communicated with the accommodating groove, the second opening is located on the surface of the upper plastic facing the pole terminal, and the heat conducting member is connected with the pole terminal through the second opening.

According to some embodiments of the application, the top cap assembly further comprises a heat-conducting pouring sealant, and the heat-conducting pouring sealant is filled between the inner surface of the upper plastic and the outer surface of the pole terminal.

According to some embodiments of the present application, the heat-conducting member includes a heat-conducting portion and a heat-dissipating portion, the heat-conducting portion is disposed in the accommodating groove, and the heat-dissipating portion is located outside the accommodating groove.

According to some embodiments of the present application, the heat conducting member is connected to a surface of the upper plastic facing away from the terminal, or the heat conducting member is connected to a surface of the upper plastic protruding out of the top cover.

According to some embodiments of the application, the surface of the heat conducting piece facing the upper plastic is provided with a first clamping groove, the outer surface of the upper plastic is further provided with a first buckle, and the first buckle is clamped in the first clamping groove.

According to some embodiments of the application, the thermally conductive member is made of graphite.

According to some embodiments of this application, the top cap is provided with location portion, it has the step to go up the plastic, the top surface of step has the constant head tank, location portion joint in the constant head tank.

A cell according to an embodiment of the second aspect of the application, comprising:

the shell is provided with an inner cavity and a third opening communicated with the inner cavity;

the battery cell is accommodated in the inner cavity;

the top cover assembly according to the embodiment of the first aspect, the top cover is connected to the casing and covers the third opening, and the pole terminal is electrically connected to the battery cell and protrudes out of the inner cavity.

According to the single battery of the embodiment of the application, at least the following beneficial effects are achieved:

by adopting the top cover assembly of the first aspect, the heat dissipation performance of the upper plastic is improved through the heat conducting piece in the top cover assembly, so that the material selection requirement of the upper plastic is reduced, and the manufacturing cost of the single battery is saved.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The present application is further described with reference to the following figures and examples, in which:

FIG. 1 is a schematic structural diagram of a cap assembly according to an embodiment of the first aspect of an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of the cap assembly of FIG. 1;

FIG. 3 is an enlarged view of area A of FIG. 2;

FIG. 4 is a schematic view, partially in cross-section, of a cap assembly according to another embodiment of the first aspect of the present application;

FIG. 5 is a schematic view, partially in cross-section, of a cap assembly according to another embodiment of the first aspect of the present application;

FIG. 6 is a schematic view, partially in cross-section, of a cap assembly according to another embodiment of the first aspect of the present application;

FIG. 7 is a schematic view, partially in cross-section, of a cap assembly according to another embodiment of the first aspect of the present application;

fig. 8 is a schematic structural diagram of a single battery according to an embodiment of the second aspect of the present application.

Reference numerals:

a top cover 100, a positioning part 110;

a post terminal 200;

the upper plastic 300, the accommodating groove 310, the first opening 311, the second opening 312, the first buckle 320 and the positioning groove 330;

the heat-conducting member 400, the heat-conducting portion 410, the heat-dissipating portion 420, and the first engaging groove 430.

Detailed Description

Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative and are only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the positional descriptions, such as the directions of up, down, front, rear, left, right, etc., referred to herein are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present application.

In the description of the present application, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and larger, smaller, larger, etc. are understood as excluding the present numbers, and larger, smaller, inner, etc. are understood as including the present numbers. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present application, unless otherwise expressly limited, terms such as set, mounted, connected and the like should be construed broadly, and those skilled in the art can reasonably determine the specific meaning of the terms in the present application by combining the detailed contents of the technical solutions.

In the description of the present application, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Fig. 1 is a schematic structural diagram of a cap assembly according to an embodiment of a first aspect of an embodiment of the present application, fig. 2 is a schematic cross-sectional diagram of the cap assembly in fig. 1, fig. 3 is an enlarged schematic view of a region a in fig. 2, and referring to fig. 1 to 3, the cap assembly according to the embodiment of the first aspect includes: top cap 100, post terminal 200, upper plastic 300 and heat conducting member 400.

The pole terminal 200 is connected to the top cover 100 and protrudes from one side of the top cover 100. The upper plastic 300 has a mounting hole, and is fitted around the outer circumference of the pole terminal 200 through the mounting hole. The heat conduction member 400 is embedded in the upper plastic 300, and at least a portion of the heat conduction member 400 is exposed from the upper plastic 300. (as shown in fig. 3) the thermal conductivity of the thermal conductor 400 is greater than the thermal conductivity of the upper plastic 300. Therefore, the heat conducting member 400 in this embodiment can rapidly conduct out the ground temperature in the upper plastic 300 to exchange heat with the air, and the heat conducting member can dissipate the heat of the upper plastic to the air, so as to rapidly cool the upper plastic 300, and thereby rapidly cool the terminal post 200 in contact with the upper plastic 300. Therefore, the temperature in the upper plastic 300 can be quickly heat-exchanged with air through the heat-conducting member 400, so that the upper plastic 300 can quickly dissipate heat, i.e., the heat dissipation performance of the terminal post 200 is improved. When being applied to battery cell, in the in-process of charging or discharging, the adaptor that is used for electrically conductive connection inside utmost point post terminal 200 and battery cell generates heat comparatively seriously, and heat conduction piece 400 can carry out the heat exchange with the air fast with the heat that battery cell inside heat and utmost point post terminal 200 produced to improve the radiating efficiency, effectively solve the inside heat gathering of battery cell, the problem that the difference in temperature is big, be applied to battery cell, help realizing battery cell's quick charge and high rate discharge function. In addition, it can be understood that, in this embodiment, through the combination of the upper plastic 300 with a higher insulation coefficient and the heat conducting member 400 with a higher heat conductivity coefficient, a better insulation property can be provided between the terminal post 200 and the top cover 100, thereby avoiding a short circuit of the single battery, and further enabling the terminal post 200 to dissipate heat quickly, thereby improving the safety of the single battery and the charging and discharging efficiency. The material of the upper plastic 300 with high requirement is not required to be selected, so that the material selection requirement of the upper plastic 300 is reduced, and the manufacturing cost is saved.

Referring to fig. 3, in some embodiments, the upper plastic 300 has a receiving groove 310 and a first opening 311, and the first opening 311 communicates the receiving groove 310 with an external space. The first opening 311 is located at a portion of the upper plastic 300 protruding from the top cover 100 and located on an outer surface of the upper plastic 300. The heat-conducting piece 400 is at least partially located in the accommodating groove 310, and the heat-conducting piece 400 is in contact with the air through the first opening 311, so that the space inside the upper plastic 300 is rapidly led out, heat exchange is performed with the air, the heat dissipation efficiency of the upper plastic 300 is improved, and the heat dissipation efficiency of the pole terminal 200 is improved.

Based on the above embodiments, the upper plastic 300 further has a second opening 312, the second opening 312 is located on the surface of the upper plastic 300 facing the post terminal 200, that is, the second opening 312 is located on the hole wall of the mounting hole, as shown in fig. 4, fig. 4 is a partial cross-sectional view of a top cover assembly according to another embodiment of the first aspect of the present disclosure, and the second mounting hole is communicated with the receiving groove 310. The heat conducting member 400 is disposed in the accommodating groove 310, one end of the heat conducting member 400 is in contact with the terminal 200 through the second opening 312, and the other end of the heat conducting member 400 is in contact with the air through the first opening 311, so that the heat conducting member 400 can directly conduct heat of the terminal 200 out and exchange heat with the air, and the heat dissipation performance of the terminal 200 is improved. In addition, since the heat conducting member 400 is disposed in the receiving groove 310, the heat conducting member 400 can also be used for conducting heat away from the plastic 300 on the terminal, so as to further improve the heat dissipation performance of the terminal 200.

On the basis of the above embodiment, the top cover assembly further includes a heat-conducting potting adhesive, and the heat-conducting potting adhesive is filled between the inner surface of the upper plastic 300 and the outer surface of the post terminal 200. To absorb the manufacturing deviation and ensure good contact between the heat-conducting member 400 and the post terminal 200, thereby ensuring the heat-conducting effect. The high-viscosity heat-conducting pouring sealant can be adopted, the heat-conducting pouring sealant is dripped on the pole terminal 200 before the heat-conducting piece 400 and the pole terminal 200 are assembled, then the heat-conducting piece 400 is assembled on the through part, and the heat-conducting pouring sealant is extruded between the heat-conducting piece 400 and the pole terminal 200. Alternatively, a low-viscosity heat-conducting potting adhesive may be used, and the heat-conducting member 400 may be assembled to the post terminal 200 and then dropped between the two.

In addition, the heat conducting member 400 may be disposed in the receiving groove 310 in a filling manner, and a portion of the heat conducting member 400 that overflows from the second opening 312 serves as a heat conducting potting adhesive and is in close contact with the terminal 200.

In some embodiments, the heat conducting element 400 includes a heat conducting portion 410 and a heat dissipating portion 420 connected to each other, the heat conducting portion 410 is disposed in the accommodating groove 310, and the heat dissipating portion 420 is disposed outside the accommodating groove 310, as shown in fig. 5, fig. 5 is a partial cross-sectional view of a top cover assembly according to another embodiment of the first aspect of the present disclosure, the heat conducting portion 410 can rapidly transfer heat inside the upper plastic 300 to the heat dissipating portion 420, and the heat dissipating portion 420 is in contact with the outside air. And the heat dissipation portion 420 is located outside the accommodation groove 310, and can increase the contact area between the heat conducting member 400 and the air, thereby increasing the heat exchange speed between the heat conducting member 400 and the air, increasing the heat dissipation efficiency of the upper plastic 300, and further increasing the heat dissipation efficiency of the post terminal 200.

It is understood that the end face of the post terminal 200 is usually connected to other components, such as connecting plates, for series-parallel connection between adjacent single batteries. Therefore, in some embodiments, the heat conducting element 400 is exposed on the surface of the upper plastic 300 away from the post terminal 200, as shown in fig. 6, and fig. 6 is a partial cross-sectional view of a cap assembly according to another embodiment of the first aspect of the present application. For example, when the upper plastic 300 has the receiving groove 310, the first opening 311 is disposed on the surface of the upper plastic 300 away from the mounting hole, so that the contact surface between the heat conducting member 400 and the air avoids other components, and the other components are prevented from shielding the heat conducting member 400, thereby ensuring the heat dissipation performance of the upper plastic 300, and ensuring that the post terminal 200 can dissipate heat quickly.

Referring to fig. 7, fig. 7 is a schematic partial cross-sectional view of a cap assembly according to another embodiment of the first aspect of the present application, including: the terminal comprises a top cover 100, a pole terminal 200, an upper plastic 300 and a heat conducting piece 400. The post terminal 200 is connected to the top cover 100 and protrudes from one side of the top cover 100. The upper plastic 300 has a mounting hole, and is fitted around the outer circumference of the pole terminal 200 through the mounting hole. The heat conductive member 400 is attached to the surface of the upper plastic 300. Preferably, the heat conduction member 400 is connected to the surface of the upper plastic 300 away from the pole terminal 200, or the heat conduction member 400 is connected to the surface of the upper plastic 300 protruding from the top cover 100. The heat-conducting member 400 in this embodiment can derive the ground temperature in the plastic 300 fast, carries out the heat exchange with the air, and the heat-conducting member can give off the heat of last plastic to the air for go up plastic 300 rapid cooling, thereby make and go up plastic 300 contact and obtain utmost point post terminal 200 rapid cooling.

In some embodiments, a first engaging groove 430 is formed on a surface of the heat conducting member 400 facing the upper plastic 300, and a first engaging hook 320 is further formed on an outer surface of the upper plastic 300, wherein the first engaging hook 320 is engaged with the first engaging groove 430. Thereby achieving rapid assembly of the heat conductive member 400 and the upper plastic 300. Go up plastic 300 and can set up to the pipe column structure, first draw-in groove 430 includes the joint section and the guide section that communicate each other, wherein, the joint section is followed the circumference extension of last plastic 300 and is set for length, along the axial of last plastic 300, the guide section extends to the terminal surface of heat-conducting piece 400 from the cell wall of joint section towards the direction that deviates from the base part, during the assembly, heat-conducting piece 400 embolias last plastic 300 along the axial, first buckle 320 can get into the guide section, and get into the joint section through the relative rotation between heat-conducting piece 400 and the last plastic 300, realize heat-conducting piece 400 and last plastic 300's joint, simple structure and joint are stable, help rapid Assembly.

In addition, the heat conducting member 400 can further include a second buckle, the upper plastic 300 has a second clamping groove, the second buckle is clamped in the second buckle, the heat conducting member 400 is connected to the upper plastic 300, and the second buckle can also serve as the heat conducting portion 410 of the heat conducting member 400 in the above embodiment, so that the structure is simpler.

In some embodiments, the heat conducting member 400 is made of graphite, so that the heat conducting member 400 has a strong thermal conductivity, thereby improving the heat dissipation of the upper plastic 300, and thus improving the heat dissipation of the post terminal 200, and in addition, the graphite has a good thermal stability, so that the graphite still has a strong thermal conductivity after a long time operation, it can be understood that the heat conducting member can also be made of metal or non-metal materials with good thermal conductivity, such as silicone, epoxy, polyurethane, acrylic resin, paraffin, gold, silver, and the like.

It is understood that, during the single body operation, the upper plastic 300 may be deformed due to the temperature rise, and the deformation of the upper plastic 300 may cause the heat conducting member 400 to fall off, thereby affecting the heat dissipation performance. Based on this, in some embodiments, the top cover 100 is provided with the positioning portion 110, the upper plastic 300 has a step, the top surface of the step has the positioning groove 330, the positioning portion 110 is clamped in the positioning groove 330, and the positioning portion 110 on the top cover 100 can position the upper plastic 300, which is beneficial to the assembly of the upper plastic 300. In addition, location portion 110 joint can play certain support ability to last plastic 300 in the constant head tank, prevents to go up plastic 300 and takes place deformation, improves the reliability of the top cap subassembly of this embodiment.

Fig. 8 is a schematic structural diagram of a single battery according to an embodiment of the second aspect of the present application, and referring to fig. 8, the single battery according to the embodiment of the second aspect includes: the battery pack comprises a housing 500, a battery cell and the top cover assembly of the above embodiment, wherein the housing 500 has an inner cavity and a third opening 510 communicated with the inner cavity, and the battery cell is accommodated in the inner cavity. The top cover 100 is connected to the casing 500 and covers the third opening 510, and the pole terminal 200 is electrically connected to the battery cell and protrudes out of the inner cavity. The thermal conductivity of the thermal conductor 400 in the top cap assembly is greater than the thermal conductivity of the upper plastic 300, and the thermal conductor 400 is connected to the upper plastic 300 and partially exposed from the upper plastic 300. Therefore, the temperature in the upper plastic 300 can be quickly heat-exchanged with air through the heat-conducting member 400, so that the upper plastic 300 can quickly dissipate heat, that is, the heat dissipation performance of the terminal 200 is improved, and the heat dissipation performance of the single battery is improved. In addition, it can be understood that in this embodiment, through the combination of the upper plastic 300 with a higher insulation coefficient and the heat conducting member 400 with a higher thermal conductivity coefficient, a better insulation property can be provided between the post terminal 200 and the top cover 100, and the post terminal 200 can also dissipate heat quickly, so as to reduce the material selection requirement of the upper plastic 300 and save the manufacturing cost of the single battery.

It should be noted that, since the present embodiment adopts all technical features of the top cover assembly of the embodiment of the first aspect, the present embodiment has all the beneficial effects brought by the embodiment of the first aspect, and details are not described herein again.

The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present application. Furthermore, the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

Claims (10)

1. A header assembly, comprising:

a top cover;

the pole terminal is connected to the top cover and protrudes out of one side of the top cover;

the upper plastic is sleeved on the periphery of the pole terminal;

the heat conducting piece is arranged on the upper plastic, at least part of the heat conducting piece is exposed out of the upper plastic, and the heat conductivity coefficient of the heat conducting piece is larger than that of the upper plastic.

2. The cap assembly of claim 1, wherein the thermal conductor member is embedded in the upper plastic, the thermal conductor member being at least partially exposed from the upper plastic.

3. The lid assembly of claim 2, wherein the upper plastic has an accommodating cavity and a first opening communicating with the accommodating cavity, the first opening is located on a portion of the upper plastic protruding from the lid and on an outer surface of the upper plastic, and the thermal conductor is at least partially located in the accommodating cavity.

4. The header assembly of claim 3, wherein the upper plastic further has a second opening in communication with the receiving cavity, the second opening being located on a surface of the upper plastic facing the post terminal, the thermal conductor being connected to the post terminal through the second opening.

5. The cover assembly of claim 3, wherein the thermal conductor member comprises a thermal conductor portion and a heat dissipating portion connected to each other, the thermal conductor portion being disposed within the receiving groove, the heat dissipating portion being disposed outside of the receiving groove.

6. The top cap assembly of claim 1, wherein the thermal conductor is attached to a surface of the upper plastic facing away from the terminal post, or the thermal conductor is attached to a surface of the upper plastic protruding from the top cap.

7. The top cap assembly of claim 6, wherein a first engaging groove is formed on a surface of the heat conducting member facing the upper plastic, and a first engaging protrusion is formed on an outer surface of the upper plastic and engaged with the first engaging groove.

8. The header assembly of claim 1, wherein the thermally conductive member is made of graphite.

9. The top cap assembly of claim 1, wherein the top cap has a positioning portion, the upper plastic has a step, the top surface of the step has a positioning groove, and the positioning portion is engaged with the positioning groove.

10. A cell, comprising:

the shell is provided with an inner cavity and a third opening communicated with the inner cavity;

the battery cell is accommodated in the inner cavity;

the cap assembly of any one of claims 1 to 9, the cap being connected to the housing and covering the third opening, the post terminal being electrically connected to the electrical core and protruding outside of the internal cavity.

Images