CN217062422U

CN217062422U - Coating transfer sheet and secondary battery

Info

Publication number: CN217062422U
Application number: CN202220232922.5U
Authority: CN
Inventors: 何金磊; 赵艺惠
Original assignee: Shanghai Lanjun New Energy Technology Co Ltd
Current assignee: Shanghai Lanjun New Energy Technology Co Ltd
Priority date: 2022-01-27
Filing date: 2022-01-27
Publication date: 2022-07-26
Anticipated expiration: 2032-01-27

Abstract

The embodiment of the utility model provides a coating switching piece and secondary battery relates to battery technical field. The coating adapter plate comprises an adapter plate and a heat conduction coating arranged on the adapter plate, wherein a fusing area is arranged in the middle of the adapter plate, and at least part of the heat conduction coating is coated on the fusing area so as to transfer heat in the fusing area to two ends of the adapter plate. The automatic temperature equalization can be realized through the rapid heat exchange, the temperature difference of different parts of the switching piece is reduced, the uniform reduction of the overall temperature of the switching piece is achieved, and the switching piece can normally work under the working condition of larger current, so that the output power of the system is improved.

Description

Coating transfer sheet and secondary battery

Technical Field

The utility model relates to a battery technology field particularly, relates to a coating switching piece and secondary battery.

Background

The conventional adapter plate with the fusing function is generally formed by an adapter plate and fusing, the whole material is aluminum Al, and the adapter plate is assembled with an insulating part into a whole, and the fusing adapter plate is called as a fusing adapter plate for short later. The normal work of circuit under normal operating mode can be guaranteed on the one hand to the switching piece of fusing, and on the other hand, the switching piece of fusing can be immediately fused under extreme operating mode such as short circuit, the circuit cut-off. If the short circuit and other pole conditions occur, the whole system can be subjected to fire explosion due to continuous work, and needs to be immediately fused, so that the association between the fault battery cell and the system is isolated.

Therefore, the fusing adaptor needs to have enough sectional area and the sectional area cannot be too large. The fusing must occur in the fusing region. It is common practice to provide the fuse region as a notch or a central perforation. The fuse region is thus a heat accumulation region and the heat dissipation condition is limited. During normal operation, the temperature rise and the temperature fall at the fusing part determine the maximum output power of the circuit.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a coating keysets and secondary battery, it can improve the heat dissipation in fusing district, and then the maximum output of lifting circuit.

The embodiment of the utility model is realized like this:

in a first aspect, the utility model provides a coating switching piece, include the switching piece and locate heat conduction coating on the switching piece, the middle part of switching piece is equipped with fusing zone, the coating of heat conduction coating at least part is in fusing zone, with will fusing zone's heat transfer extremely the both ends of switching piece.

In an alternative embodiment, the heat conducting coating is partially or completely coated on the adapter plate.

In an optional embodiment, the interposer includes a first surface and a second surface that are disposed opposite to each other, and the heat conductive coating is disposed on the first surface, or the heat conductive coating is disposed on the second surface, or the heat conductive coatings are disposed on the first surface and the second surface, respectively.

In an alternative embodiment, the grain direction of the heat-conducting coating is arranged along the length direction or the width direction of the adapter sheet.

In an optional embodiment, the grain direction of the heat-conducting coating and the length direction of the adapter sheet form an included angle of 30-70 degrees.

In an alternative embodiment, the thickness of the thermally conductive coating is 0.05mm to 3 mm.

In an alternative embodiment, the heat conducting coating is made of a polymer insulating material.

In an alternative embodiment, the polymer insulating material is at least one of silicon carbide, carbon nanotubes and graphene.

In an optional embodiment, a plastic part is further disposed on the adapter sheet, and the plastic part covers the fusing area.

In a second aspect, the present invention provides a secondary battery, which comprises an electrical core, a cover plate and a coating patch as in any one of the above embodiments, wherein the coating patch is disposed between the electrical core and the cover plate.

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

the embodiment of the utility model provides a coating switching piece, the coating of heat conduction coating is at least partly coated fusing district, with will fusing district's heat transfer extremely automatic balanced temperature can be realized through heat quick exchange at the both ends of switching piece, reduces the temperature difference at the different positions of switching piece, reaches switching piece bulk temperature and evenly descends, and the switching piece can normally work under the operating mode of heavy current more like this to the output of system has been promoted.

The embodiment of the utility model provides a secondary battery, including electric core, apron and foretell coating switching piece, because the coating switching piece has improved the heat dissipation in fusing district, can realize fast that the heat exchange reaches the purpose of the automatic balanced temperature of switching piece, the switching piece can normally work under the operating mode of more heavy current like this to secondary battery's output has been promoted.

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 first arrangement of a heat conductive coating of a coating adaptor sheet according to an embodiment of the present invention;

fig. 2 is a second arrangement of the heat conductive coating of the coating adaptor sheet according to an embodiment of the present invention;

fig. 3 is a third arrangement of the heat conductive coating of the coating adapter sheet according to the embodiment of the present invention;

fig. 4 is a schematic structural diagram of a coating interposer according to an embodiment of the present invention.

Icon: 10-a coating transfer sheet; 100-an adaptor sheet; 110-fusing the via; 120-a fuse region; 130-a thermally conductive coating; 140-plastic part.

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 present invention, presented in the accompanying drawings, 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 or 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 required to be absolutely horizontal or pendant, but rather 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, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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.

The normal work of circuit under the normal operating mode can be guaranteed on the one hand to the switching piece of fusing, and on the other hand, under the extreme operating mode such as short circuit appears, the switching piece of fusing needs fusing immediately, and the purpose of isolating this trouble electricity core and system's relevance is reached to the circuit cut-off. Therefore, the fuse interposer needs to have a sufficient cross-sectional area to ensure proper operation, but not too large to ensure immediate fuse in the event of a short circuit. The fusing must occur in the fusing area, and it is common practice to provide the interposer with a notch or intermediate perforation. The fusing region is a heat accumulation region and heat dissipation conditions are limited. During normal operation, the temperature rise and the temperature fall at the fusing part determine the maximum output power of the circuit.

In order to overcome at least one defect in the prior art, the embodiment provides a coating interposer 10, which can improve the heat dissipation of the fusing region 120, transfer the high-temperature heat of the fusing region 120 to the low-temperature regions at two ends of the interposer 100, achieve self-balance temperature, and uniformly lower the overall temperature of the interposer 100, so that the interposer 100 can normally work under the working condition of larger current, thereby improving the output power of the system.

Referring to fig. 1 and fig. 2, the coating interposer 10 provided in this embodiment includes an interposer 100 and a thermal conductive coating 130 disposed on the interposer 100, a fusing area 120 is disposed in a middle portion of the interposer 100, and at least a portion of the thermal conductive coating 130 is coated on the fusing area 120 to transfer heat of the fusing area 120 to two ends of the interposer 100, so that automatic temperature equalization can be achieved through rapid heat exchange, temperature difference at different portions of the interposer 100 is reduced, and the overall temperature of the interposer 100 is uniformly reduced, so that the interposer 100 can normally operate under a working condition of a larger current, thereby increasing output power of the system.

It should be noted that the middle portion of the interposer 100 is provided with a fusing through hole 110, and two sides of the fusing through hole 110 in the width direction of the interposer 100 are fusing regions 120 of the interposer 100.

Optionally, the interposer 100 is coated with a thermally conductive coating 130 partially or completely. As shown in fig. 1, the heat conductive coating 130 is coated on all of the interposer 100, and the heat conductive coating 130 is used for conducting heat to the interposer 100, so as to improve the heat dissipation performance of the battery product and ensure that the overall temperature of the interposer 100 is uniformly reduced in a normal operating state. In this embodiment, the grain direction of the heat conducting coating 130 is arranged along the length direction or the width direction of the interposer 100, so as to improve the heat conducting effect of the heat conducting coating 130. Optionally, the grain direction of the heat conducting coating 130 and the length direction of the interposer 100 are arranged at an included angle of 30 degrees to 70 degrees, such as 45 degrees or 60 degrees, to enhance the directional heat transfer function. Of course, in other embodiments, the grain direction of the heat conductive coating 130 may also be perpendicular to the length direction or the width direction of the interposer 100, or the grain direction of the heat conductive coating 130 is arranged in a grid-crossing manner, which is not limited herein.

As shown in fig. 2, a heat conducting coating 130 is partially coated on the interposer 100, and optionally, the heat conducting coating 130 is coated on the fusing region 120 of the interposer 100 for transferring heat generated by the fusing region 120 to two ends of the interposer 100, so as to uniformly reduce the temperature of the whole interposer 100. The thermal conductive coating 130 is partially coated on the fuse region 120, similar to the full coating. For example, the grain direction of the heat conducting coating 130 is arranged along the length direction or the width direction of the interposer 100, and optionally, the grain direction of the heat conducting coating 130 and the length direction of the interposer 100 form an included angle of 30 degrees to 70 degrees, such as 45 degrees or 60 degrees, to improve the heat conducting effect of the heat conducting coating 130 and enhance the directional heat transfer function. Of course, in other embodiments, the grain direction of the heat conductive coating 130 may also be perpendicular to the length direction or the width direction of the interposer 100, or the grain direction of the heat conductive coating 130 is arranged in a grid-crossing manner, which is not limited herein. When the thermal conductive coating 130 is partially disposed on the fuse region 120, the width of the thermal conductive coating 130 may be less than, equal to, or greater than the width of the fuse region 120.

Of course, without limitation, the thermal conductive coating 130 may be partially coated on the interposer 100, or partially coated on the non-fusing region. As shown in fig. 3, the thermal conductive coating 130 is not only disposed on the fuse area 120, but also coated on the non-fuse area at intervals, and stripes of the thermal conductive coating 130 are formed on the non-fuse area of the interposer 100 at intervals, where the stripe direction of the thermal conductive coating 130 includes, but is not limited to, the length direction and the width direction of the interposer 100, or is disposed at an angle with respect to the length direction of the interposer 100, and is not limited in this respect.

It is understood that the interposer 100 includes a first surface and a second surface opposite to each other, and the first surface is provided with the thermal conductive coating 130, or the second surface is provided with the thermal conductive coating 130, or the first surface and the second surface are respectively provided with the thermal conductive coating 130. The heat conductive coating 130 is disposed on the interposer 100 in a manner including, but not limited to, continuous coating, partial coating, or partial interval coating. In this embodiment, the thermal conductive coating 130 is distributed mainly on the first surface and the second surface of the interposer 100, but may be distributed on the side formed between the first surface and the second surface in other embodiments.

Optionally, the thickness of the heat conducting coating 130 is 0.05mm to 3mm, such as 0.1mm, 0.5mm, 1mm, 1.1mm, 1.5mm or 2mm, etc., and the heat conducting coating 130 is set to a reasonable thickness, so that better heat conducting and radiating effects can be achieved, uniform temperature reduction of the whole adapter plate 100 is ensured, and the heat conducting coating can normally work under a large-current working condition to improve the output power of the circuit.

In this embodiment, the thermal conductive coating 130 is made of a polymer insulating material. The polymer insulating material is at least one of silicon carbide, carbon nanotube and graphene, and has a good heat conduction effect. The heat-conducting coating 130 has a tolerance temperature range of-30 ℃ to 600 ℃, can adapt to the environmental temperature under different working conditions, and keeps good heat-conducting performance. Secondly, the heat conducting coating 130 can also transfer heat in an infrared heat radiation manner, so that heat in the fusing region 120 can be quickly and effectively radiated to low-temperature regions at two ends of the interposer 100, and the automatic temperature equalization effect is good.

Referring to fig. 4, optionally, a plastic member 140 is further disposed on the interposer 100, and the plastic member 140 covers the fuse area 120, so as to further enhance the heat conduction effect and conduct the heat of the fuse area 120 to two ends of the interposer 100. Of course, in some embodiments, the thermal conductive coating 130 has a good thermal conductive effect, so as to ensure that the overall temperature of the interposer 100 is uniformly and rapidly decreased, and the plastic part 140 may be omitted.

It should be noted that, in this embodiment, by disposing the heat conducting coating 130 on the surface of the interposer 100, no matter whether the heat conducting coating 130 is disposed on all or part of the interposer 100, the directional heat transfer function can be enhanced, and the heat in the fusing region 120 can be quickly and effectively conducted to the low temperature regions at both ends of the interposer 100.

The coating adapter sheet 10 provided in this embodiment has the following working principle:

due to the arrangement of the fusing through hole 110 on the interposer 100, the heat of the fusing area 120 is relatively concentrated, the temperature rise is large, and the temperature is high. Under normal operating condition, the heat conduction coating 130 that sets up on the surface of the switching piece 100 can directionally transmit the high temperature heat of fusing area 120 to the low temperature region (non-fusing area) at both ends, and combine two kinds of modes of heat conduction and heat radiation to transmit the high temperature heat of fusing area 120 to the low temperature region at both ends fast, can realize automatic equilibrium temperature through the quick exchange of heat, reduce the temperature difference of different positions of switching piece 100, reach the purpose that the whole temperature of switching piece 100 evenly descends, switching piece 100 can normally work under the operating mode of more heavy current like this, thereby the output of system has been promoted.

In addition, under the working condition that short circuit or extreme abnormal phenomenon appears, the heat conducting coating 130 is used as an insulating material, normal fusing of the fusing area 120 cannot be influenced, the isolation of a fault battery core and a system can be ensured, and the use safety of the battery is improved.

An embodiment of the utility model provides a secondary battery is still provided, including electric core, apron and as in the coating keysets 10 of any one of the aforesaid embodiment, coating keysets 10 are located between electric core and the apron.

To sum up, the embodiment of the present invention provides a coating adaptor sheet 10 and a secondary battery, which have the following beneficial effects:

the embodiment of the utility model provides a coating switching piece 10, the coating of heat conduction coating 130 is at least partly coated in fusing area 120, with the heat transfer of fusing area 120 to switching piece 100's both ends, can realize the automatic equilibrium temperature of switching piece 100 through heat quick exchange, reduce the temperature difference at the different positions of switching piece 100, reach the purpose that the whole temperature of switching piece 100 evenly descends, so that switching piece 100 can normally work under the operating mode of more heavy current, thereby the output of system has been promoted.

The embodiment of the utility model provides a secondary battery, including electric core, apron and foretell coating switching piece 10, because coating switching piece 10 has improved the heat dissipation of fusing area 120, can realize fast that the heat exchange reaches the purpose of the automatic equilibrium temperature of switching piece 100, switching piece 100 can normally work under the operating mode of more heavy current like this to secondary battery's output has been promoted.

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. The coating adapter plate is characterized by comprising an adapter plate and a heat conduction coating arranged on the adapter plate, wherein a fusing area is arranged in the middle of the adapter plate, and at least part of the heat conduction coating is coated on the fusing area so as to transfer heat in the fusing area to two ends of the adapter plate.

2. The coating patch of claim 1, wherein the thermal conductive coating is partially or completely applied to the patch.

3. The coating interposer as recited in claim 1, wherein the interposer comprises a first surface and a second surface disposed opposite to each other, wherein the first surface is provided with the thermally conductive coating, the second surface is provided with the thermally conductive coating, or the first surface and the second surface are provided with the thermally conductive coating, respectively.

4. The coating adaptor sheet of claim 1, wherein the grain direction of the thermally conductive coating is disposed along the length or width direction of the adaptor sheet.

5. The coating adaptor sheet of claim 1, wherein the grain direction of said thermally conductive coating is disposed at an angle of 30 to 70 degrees to the length direction of said adaptor sheet.

6. The coating interposer as recited in claim 1, wherein the thermally conductive coating has a thickness of 0.05mm to 3 mm.

7. The coating patch of claim 1, wherein the thermally conductive coating comprises a polymeric insulating material.

8. The coating interposer as recited in claim 7, wherein the polymer insulating material is at least one of silicon carbide, carbon nanotubes, and graphene.

9. The coated interposer as claimed in any one of claims 1 to 8, wherein a plastic member is further disposed on the interposer, and the plastic member covers the fusing region.

10. A secondary battery comprising a cell, a cover plate and the coating adaptor sheet of any one of claims 1 to 9, the coating adaptor sheet being disposed between the cell and the cover plate.