CN217062421U

CN217062421U - Connecting sheet assembly, secondary battery and battery module

Info

Publication number: CN217062421U
Application number: CN202220204668.8U
Authority: CN
Inventors: 赵艺惠
Original assignee: Shanghai Lanjun New Energy Technology Co Ltd
Current assignee: Shanghai Lanjun New Energy Technology Co Ltd
Priority date: 2022-01-25
Filing date: 2022-01-25
Publication date: 2022-07-26
Anticipated expiration: 2032-01-25

Abstract

The application provides a connecting piece subassembly, secondary battery and battery module, relates to battery technical field. The connecting piece assembly comprises a connecting piece and a heat-conducting insulating piece, wherein the connecting piece comprises a first connecting part and a second connecting part, the first connecting part is used for being connected with a pole ear, and the second connecting part is used for being connected with a pole column; a fusing part is arranged between the first connecting part and the second connecting part, the heat-conducting insulating sheet covers the fusing part and at least partially covers the first connecting part, and the heat-conducting insulating sheet and the second connecting part are arranged at intervals; the heat-conducting insulating sheet is used for being clamped between the connecting sheet and the lug; the heat-conducting insulating sheet is made of a heat-conducting heat-insulating material, can conduct heat at a lower temperature so as to reduce the temperature of the battery, and can insulate heat at a higher temperature so as to accelerate the fusing of the fusing part, so that the use safety of the battery is improved.

Description

Connecting sheet assembly, secondary battery and battery module

Technical Field

The utility model relates to a battery technology field particularly, relates to a connecting piece subassembly, secondary battery and battery module.

Background

The existing connecting sheet is mostly a flat-plate-shaped metal plate material, and a fusing layer is arranged in the middle of the connecting sheet. The fusing position where the fusing layer is located is easy to gather heat and raise the temperature, so that the temperature is too high, fire or explosion can be caused, potential safety hazards exist, and the safety is not high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a connecting piece subassembly, secondary battery and battery module, it can realize the heat conduction under the lower temperature state, keeps warm under the state of higher temperature and fuses with higher speed, improves the security that the battery used.

The embodiment of the utility model is realized like this:

in a first aspect, the utility model provides a connecting sheet assembly, which comprises a connecting sheet and a heat-conducting insulating sheet, wherein the connecting sheet comprises a first connecting part, a fusing part and a second connecting part which are connected in sequence, the first connecting part is used for being connected with a pole ear, and the second connecting part is used for being connected with a pole column;

the fusing part is positioned between the first connecting part and the second connecting part, the heat-conducting insulating sheet covers the fusing part and at least partially covers the first connecting part, and the heat-conducting insulating sheet and the second connecting part are arranged at intervals; the heat-conducting insulating sheet is used for being clamped between the connecting sheet and the lug;

the heat conduction insulating piece adopts heat conduction insulation material to make, can heat conduction under first temperature state in order to reduce the battery temperature to can keep warm under the second temperature state in order to accelerate the fusing of fusing portion, first temperature is less than the second temperature.

In an alternative embodiment, the thermally conductive insulating sheet has a thickness of 0.08mm to 2 mm.

In an alternative embodiment, the heat-conducting and heat-insulating material is a mica sheet or a graphene heat radiation sheet.

In an alternative embodiment, the thermally conductive insulating sheet has a width equal to the width of the connecting sheet.

In an alternative embodiment, the connecting piece includes a first surface and a second surface which are oppositely arranged, and the fusing part is provided with a through hole which penetrates through the first surface and the second surface; the first surface is used for being connected with the apron, the second surface is used for being connected with utmost point ear, the heat conduction insulating piece is located the second surface.

In an alternative embodiment, the second connection portion comprises at least one connection post provided on the second surface.

In a second aspect, the present invention provides a secondary battery, which comprises a cover plate, an electric core and a connecting plate assembly as in any one of the above embodiments, wherein the connecting plate is arranged between the electric core and the cover plate, and the heat-conducting insulating sheet is arranged between the connecting plate and the electric core.

In an optional embodiment, a plastic part is arranged on one side of the cover plate close to the battery core, and the connecting piece is connected to the plastic part.

In a third aspect, the present invention provides a battery module including at least one secondary battery as in the previous embodiments.

The embodiment of the utility model provides a beneficial effect is:

the embodiment of the utility model provides a connecting plate assembly, the fusing part is covered with a heat-conducting insulating sheet, and the heat-conducting insulating sheet is placed between a pole ear and a connecting plate in a clamping way, thereby being convenient for installation; and the heat-conducting insulating sheet is made of a heat-conducting and heat-insulating material, so that heat can be conducted at a lower temperature to reduce the temperature of the battery, heat can be preserved at a higher temperature to accelerate the fusing of the fusing part, and the use safety of the battery is improved.

The embodiment of the utility model provides a secondary battery, including foretell connecting plate subassembly, still including apron and electric core, the heat conduction insulating piece is located between electric core and the connection piece, simple to operate, stable in structure, and the heat conduction is effectual, can heat conduction under the lower temperature state in order to reduce battery temperature to can keep warm under the higher temperature in order to accelerate the fusing of fusing portion improves the security that the battery used, reduces latent safety risk.

The embodiment of the utility model provides a battery module, including foretell secondary battery, simple structure, simple to operate, security are high, can promote the security performance of product, prevent to take place incident such as fire or explosion.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view of an exploded structure of a connecting sheet assembly according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a connecting plate assembly according to an embodiment of the present invention;

fig. 3 is a schematic cross-sectional view of a connecting plate assembly according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a first view angle of an application scenario of the connecting sheet assembly according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a second view angle of an application scenario of the connecting sheet assembly according to an embodiment of the present invention.

Icon: 10-a connector piece assembly; 100-connecting sheets; 110-a first connection; 120-a second connection; 130-a fusing portion; 125-connecting column; 135-a through hole; 140-a thermally conductive insulating sheet; 150-plastic parts; 210-a cover plate; 220-electric core; 230-pole ear.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are usually placed when used, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element indicated must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are absolutely horizontal or hanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In order to overcome the defects of the prior art, the embodiment provides the connecting piece assembly 10, which can prevent the temperature of a fusing part from being too high, has the characteristics of conducting heat at a lower temperature so as to reduce the temperature of the battery, and insulating heat at a higher temperature so as to accelerate the fusing of the fusing part 130, improves the use safety of the battery, reduces the probability of occurrence of safety accidents such as fire or explosion, and greatly improves the safety performance of products.

Referring to fig. 1 to fig. 3, wherein fig. 3 is a schematic cross-sectional view taken along line a-a in fig. 2. The connecting sheet assembly 10 provided by the embodiment comprises a connecting sheet 100 and a heat-conducting insulating sheet 140, wherein the connecting sheet 100 comprises a first connecting portion 110, a fusing portion 130 and a second connecting portion 120 which are sequentially connected, the first connecting portion 110 is used for being connected with a tab 230 (see fig. 4), and the second connecting portion 120 is used for being connected with a pole; the fusing part 130 is positioned between the first connection part 110 and the second connection part 120, and is connected with the first connection part 110 and the second connection part 120, respectively; the heat-conducting insulation sheet 140 covers the fuse portion 130, and at least partially covers the first connection portion 110, and the heat-conducting insulation sheet 140 and the second connection portion 120 are spaced apart; the thermally conductive insulating sheet 140 is for being sandwiched between the connecting sheet 100 and the tab 230. The heat-conductive insulation sheet 140 is made of a heat-conductive insulation material, and can conduct heat in a first temperature state to lower the temperature of the battery, and can insulate heat in a second temperature state to accelerate the fusing of the fusing part 130. The first temperature is lower than the second temperature, the first temperature is a temperature range in which the battery works normally, and the first temperature is lower than the second temperature; the second temperature is a temperature at which the battery is in a short circuit or abnormal state, and is a relatively high temperature. This connection piece assembly 10 heat conduction effect is good, and the security is high, is favorable to promoting the radiating effect and the security performance of battery product.

Alternatively, the heat-conducting thermal insulation material includes but is not limited to mica sheets or graphene heat radiation sheets, and the material has the characteristics of low-temperature heat dissipation and high-temperature thermal insulation. With heat conduction insulating sheet 140 in this type of material is as connection piece subassembly 10, the battery is during operation under normal operating mode, and the high heat that fusing zone produced on connection piece 100 can pass to the both ends of connection piece 100 fast, reduces the temperature rise in fusing zone, improves the heat dissipation in fusing zone to reduce the temperature in fusing zone, ensure that the battery can work under the heavy current, can improve the output of battery. In addition, when a short circuit or an abnormal condition occurs in the circuit, the heat-conducting insulating sheet 140 has the function of high-temperature heat preservation, and can accelerate the fusing of the fusing area so as to cut off the circuit in time, prevent the battery from being ignited or exploded, improve the safety of the battery in use and avoid unnecessary economic loss.

The connecting piece 100 comprises a first surface and a second surface which are oppositely arranged, and the fusing part 130 is provided with a through hole 135 which penetrates through the first surface and the second surface; the first surface is used for connecting with the cover plate 210, the second surface is used for connecting with the tab 230, and the heat-conducting insulation sheet 140 is arranged on the second surface. Since the fusing part 130 is a part of the connection piece 100, that is, the through hole 135 may also be understood as being opened on the connection piece 100. The periphery of the through hole 135 is a to-be-blown region of the blowing portion 130, and the through hole 135 is configured to ensure that the to-be-blown region can be smoothly blown in a short circuit or other abnormal conditions, and to timely disconnect the circuit. It can be understood that the through hole 135 is located at the middle of the connecting piece 100, and the regions to be fused are located at both sides of the through hole 135. In other alternative embodiments, the through hole 135 may also be opened on both sides of the connecting piece 100, i.e. in a notch shape, and the region to be fused is arranged in the middle of the connecting piece 100, which is not limited herein.

The second connecting portion 120 includes at least one connecting post 125, the connecting post 125 is disposed on the second surface, and the connecting post 125 is used for being welded to the pole. Alternatively, the number of the connecting columns 125 includes two, and the two connecting columns 125 are spaced apart.

It should be noted that, the fusing portion 130 is disposed in the middle of the connecting sheet 100, and in the width direction of the connecting sheet 100, the width of the heat-conducting insulating sheet 140 is equal to that of the connecting sheet 100, and the width is as shown by a in fig. 3, so that the heat-conducting insulating sheet 140 conducts heat to the high-temperature heat generated at the fusing portion 130, the heat-conducting area is larger, the heat-conducting effect is better, the temperature of the battery is reduced, and the normal operation of the battery is ensured. In this embodiment, the length of the heat-conducting insulating sheet 140 is sufficient to cover the fuse 130, and at least partially cover the first connecting portion 110, or completely cover the first connecting portion 110, and the end of the heat-conducting insulating sheet 140 far away from the first connecting portion 110 needs to be spaced apart from the connecting post 125 on the second connecting portion 120, that is, there is an end spacing distance between the end of the heat-conducting insulating sheet 140 far away from the first connecting portion 110 and the connecting post 125, so as to ensure that the connecting post 125 has a good electrical conductivity.

Optionally, the thickness of the heat-conducting insulating sheet 140 is 0.08mm to 2mm, such as 0.1mm, 0.5mm, 1mm, 1.5mm and the like, and reasonable thickness setting is adopted, so that the heat-conducting insulating sheet 140 can be ensured to have good heat-conducting and heat-preserving effects, and the heat-conducting and heat-preserving effects of the heat-conducting insulating sheet 140 are fully exerted.

It should be noted that the heat conducting insulating sheet 140 in this embodiment is made of a special material, such as a mica sheet and a graphene heat radiating sheet, and has the characteristics of low temperature heat dissipation and high temperature heat preservation. For example, the graphene thermal radiation patch XK-Ray310 can improve the overall heat dissipation effect and the heat soaking effect of the connecting sheet 100, effectively reduce the heat density at the heat source of the fusing part 130, achieve the characteristics of large-area rapid heat transfer and large-area heat dissipation, and eliminate the phenomenon of single-point high temperature. The material is soft, can be punched and formed into any given shape, and has excellent processability and usability. Meanwhile, the battery has the characteristic of light weight, so that the overall weight of the battery is reduced, and the lightweight design of the battery is realized.

Under the normal working state of the battery, the heat-conducting insulating sheet 140 can conduct and dissipate the high heat of the fusing part 130, reduce the temperature of the fusing part 130, and ensure the normal working operation of the battery; when the battery is in a short circuit or other abnormal states, the heat-conducting insulating sheet 140 can realize high-temperature heat preservation and accelerated fusing of the fusing part 130, even if the circuit is cut off, so that the circuit is effectively and quickly disconnected, the battery is prevented from being ignited or exploded, the use safety of the battery is improved, and unnecessary economic loss is reduced. Secondly, the heat-conducting insulating sheet 140 in this embodiment is soft, light, thin, and convenient for forming; the heat-conducting insulating sheet 140 is directly placed between the connecting sheet 100 and the battery cell 220, an additional connecting piece is not needed, bonding and welding or a clamping structure is not needed, the installation is fast and convenient, the structure is simple, the manufacturing and processing are fast and convenient, and the cost is low.

Referring to fig. 4 and 5, fig. 5 is a schematic cross-sectional view taken along line B-B in fig. 4. The embodiment of the utility model provides a secondary battery is still provided, including apron 210, electric core 220 and as in any one of the preceding embodiment connection piece assembly 10, connection piece 100 is located between electric core 220 and apron 210, and heat conduction insulating piece 140 is located between connection piece 100 and electric core 220. Optionally, a thermally conductive insulating sheet 140 is placed between the connecting sheet 100 and the tab 230 of the cell 220. One side of the cover plate 210 close to the battery cell 220 is provided with a plastic member 150, and the connecting sheet 100 is connected to the plastic member 150.

The embodiment of the utility model provides a still provide a battery module, include at least one secondary battery as aforementioned embodiment. The battery module can be used in the fields of energy storage batteries, power batteries or other batteries, has good heat dissipation effect under the normal working state, quickly reduces the local temperature of the fusing part 130, and can work under larger current, thereby improving the output power of the battery. In the case of a short circuit or other abnormality, the fusing of the fusing part 130 can be rapidly accelerated to immediately cut off the circuit, thereby improving the safety of the battery.

To sum up, the embodiment of the present invention provides a connecting sheet assembly 10, a secondary battery and a battery module, which have the following advantages:

in the connection sheet assembly 10 provided by the embodiment of the present invention, the fusing portion 130 is provided with the heat-conducting insulation sheet 140, and the heat-conducting insulation sheet 140 is placed between the tab 230 and the connection sheet 100 in a clamping manner, so that an additional connection member is not required, and the installation is convenient; the weight is light, and the lightweight design of the battery is facilitated. The heat-conducting insulating sheet 140 is made of a heat-conducting and heat-insulating material, so that heat can be conducted at a lower temperature to reduce the temperature of the battery, heat can be preserved at a higher temperature to accelerate the fusing of the fusing part 130, and the use safety of the battery is improved.

The embodiment of the utility model provides a secondary battery, including foretell connection piece subassembly 10, still include apron 210 and electric core 220, heat conduction insulating piece 140 locates between electric core 220 and the connection piece 100, need not to set up extra connecting piece, simple to operate, stable in structure, heat conduction is effectual, can heat conduction under the lower temperature state in order to reduce battery temperature to can keep warm under the higher temperature in order to accelerate fusing 130's fusing, improve the security that the battery used, reduce latent safety risk.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A connecting sheet assembly is characterized by comprising a connecting sheet and a heat-conducting insulating sheet, wherein the connecting sheet comprises a first connecting part, a fusing part and a second connecting part which are sequentially connected, the first connecting part is used for being connected with a tab, and the second connecting part is used for being connected with a pole;

the heat conduction insulating sheet is made of a heat conduction heat preservation material, can conduct heat under a first temperature state to reduce the temperature of the battery, and can preserve heat under a second temperature state to accelerate fusing of the fusing part, wherein the first temperature is lower than the second temperature.

2. The connector assembly of claim 1, wherein the thermally conductive insulating sheet has a thickness of 0.08mm to 2 mm.

3. The strap assembly of claim 1 wherein the thermally conductive and insulative material is a mica sheet or a graphene heat radiating sheet.

4. The strap assembly of claim 1 wherein the thermally conductive insulating sheet has a width equal to a width of the strap.

5. A connecting tab assembly according to claim 1, wherein the connecting tab includes a first surface and a second surface opposite to each other, and the fuse portion has a through hole formed therethrough; the first surface is used for being connected with the apron, the second surface is used for being connected with utmost point ear, the heat conduction insulating piece is located the second surface.

6. The connector assembly of claim 5, wherein said second connecting portion includes at least one connecting post provided on said second surface.

7. The strap assembly of claim 6 wherein the number of connecting studs is two, the two connecting studs being spaced apart.

8. A secondary battery comprising a cover plate, a cell and the connector assembly of any of claims 1 to 7, wherein the connector is disposed between the cell and the cover plate, and the thermally conductive insulating sheet is disposed between the connector and the cell.

9. The secondary battery of claim 8, wherein a plastic member is disposed on a side of the cover plate adjacent to the battery cell, and the connecting piece is connected to the plastic member.

10. A battery module characterized by comprising at least one secondary battery as recited in claim 8 or 9.