CN211088350U

CN211088350U - Heat dissipation support and lithium ion battery module of cylinder electricity core

Info

Publication number: CN211088350U
Application number: CN201922170552.8U
Authority: CN
Inventors: 仇俊; 王勒言; 薛鹏; 张培
Original assignee: Linkdata New Energy Co Ltd
Current assignee: Linkdata New Energy Co Ltd
Priority date: 2019-12-06
Filing date: 2019-12-06
Publication date: 2020-07-24
Anticipated expiration: 2029-12-06

Abstract

The utility model discloses a heat dissipation support of cylinder electricity core, including first support and second support, be provided with electric core mating holes in first support and the second support respectively, still including pressing from both sides the heat dissipation support of locating between first support and the second support, be provided with electric core perforation in the heat dissipation support, electric core perforation is unanimous with the electric core mating holes axial of first support and the drill way is relative. The heat dissipation support is arranged between the first support and the second support of the heat dissipation support of the cylindrical battery cell in a clamping mode, the battery cell is arranged in the battery cell perforation of the heat dissipation support, the heat dissipation support and the heat exchange of the battery cell are utilized, the heat dissipation of the battery cell is accelerated, and the balance of module temperature is promoted. The utility model also discloses a lithium ion battery module of heat dissipation support that contains cylinder electricity core.

Description

Heat dissipation support and lithium ion battery module of cylinder electricity core

Technical Field

The utility model relates to a lithium ion battery technical field, concretely relates to heat dissipation support and lithium ion battery module of cylinder electricity core.

Background

In the energy storage product industry, the heat dissipation problem of cylindrical battery modules is one of the major problems in module design. The service life of the battery core can be seriously influenced by the overhigh temperature of the module, and even thermal runaway is caused to influence the safety of the whole battery pack. The module heat dissipation structure in the prior art mainly comprises air cooling, liquid cooling and natural convection. The air cooling is to install a cooling fan at one end of the battery pack and leave a vent hole at the other end of the battery pack to accelerate the heat flow between the electric core gaps and finally take the heat out of the module; the liquid cooling means that a liquid cooling pipe is arranged between the electric cores, the liquid cooling pipe exchanges heat with the electric cores, and cooling media in the liquid cooling pipe bring heat out of the module. Natural convection refers to increasing the distance between the cells, and the cells exchange heat with air fully and naturally.

The air-cooled and liquid-cooled module is provided with components for accelerating heat transfer, such as a cooling fan and a liquid-cooled pipe, and the structure of the module is complex. Air specific heat is little, and the heat transfer area of electricity core and liquid-cooled tube is little, and above-mentioned two kinds of factors all can lead to the heat transfer rate reduction of electricity core. Therefore, there is a need for improved heat dissipation structure of module in the prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the defect that exists among the prior art, provide a heat dissipation support of cylinder electricity core, contain the heat dissipation support in the module support, electric core heat conduction to aluminium frame, electric core heat transfer rate is high.

Realize above-mentioned technological effect, the utility model discloses a technical scheme does: the utility model provides a heat dissipation support of cylinder electricity core, includes first support and second support, be provided with electric core mating holes in first support and the second support respectively, its characterized in that still includes the heat dissipation support of pressing from both sides between first support and the second support of locating, be provided with electric core in the heat dissipation support and perforate, electric core perforate with the electric core mating holes axial of first support is unanimous and the drill way is relative.

The preferable technical scheme is that a heat conduction filling layer is arranged on the surface of the hole wall of the electric core through hole.

The preferred technical scheme is that a first heat dissipation through hole is further formed in the heat dissipation support, a second heat dissipation through hole is formed in the first support and/or the second support, and the hole openings of the first heat dissipation through hole and the second heat dissipation through hole are opposite.

The preferred technical scheme is that the axial direction of the first heat dissipation through hole is consistent with the axial direction of the electric core perforation.

The preferred technical scheme does, still include the leg joint spare, be provided with the pilot hole that the drill way is relative in first support, heat dissipation support and the second support, the leg joint spare wear establish with in the pilot hole.

The preferred technical scheme is that an insulating layer is arranged on the circumferential direction of the hole wall of the heat dissipation support.

The preferable technical scheme is that the heat dissipation support is made of aluminum, and the insulating layer is an aluminum oxide layer.

The preferred technical scheme is that the heat dissipation support is formed by splicing at least two support units side by side.

A second object of the present invention is to provide a lithium ion battery module, which comprises a heat dissipation support of the above cylindrical battery cell, and further comprises a battery cell and a connection bus bar of the battery cell, the battery cell is disposed in the battery cell mating hole and the battery cell perforation, the bus bar is connected to the electrode of the battery cell.

The utility model discloses a three lies in providing a lithium ion battery module, a serial communication port, including the heat dissipation support of foretell cylinder electricity core, still include electric core and connection the busbar of electric core, electric core sets up in electric core mating holes and the electric core perforation, the busbar with the electrode connection of electric core, be provided with third heat dissipation through-hole on the busbar, third heat dissipation through-hole with the drill way of first heat dissipation through-hole and second heat dissipation through-hole is relative.

The utility model has the advantages and the beneficial effects that:

the heat dissipation support is arranged between the first support and the second support of the heat dissipation support of the cylindrical battery cell in a clamping mode, the battery cell is arranged in the battery cell perforation of the heat dissipation support, the heat dissipation support and the heat exchange of the battery cell are utilized, the heat dissipation of the battery cell is accelerated, and the balance of module temperature is promoted.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment 1 of a heat dissipation bracket for a cylindrical battery cell of the present invention;

fig. 2 is a schematic structural view of a heat dissipating bracket in embodiment 1;

FIG. 3 is an enlarged view of a portion of FIG. 2;

fig. 4 is a schematic structural diagram of embodiment 2 of the heat dissipation bracket for a cylindrical battery cell of the present invention;

fig. 5 is a schematic structural diagram of a lithium ion battery module according to embodiment 3 of the present invention;

in the figure: 1. a first bracket; 2. a second bracket; 3. a heat dissipation bracket; 31. punching the battery core; 32. a first heat dissipating through hole; 33. an assembly hole; 4. a bolt; 5. an electric core; 6. a bus bar; 61. a third heat dissipating through hole; a. a battery cell matching hole; b. a thermally conductive filler layer; c. and a second heat dissipation through hole.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

Heat dissipation support

The effect of heat dissipation support lies in and electric core heat transfer, includes following heat transfer mode: firstly, the heat dissipation bracket is connected with the battery cell, and the heat dissipation bracket and the battery cell are in contact heat transfer; and secondly, a gap exists between the heat dissipation support and the battery core, and when the temperature of the battery core is higher than the ambient temperature, the heat transfer path is the battery core, the heat transfer medium around the battery core and the heat dissipation support. The heat transfer medium surrounding the cells comprises air. The material selection range of the heat dissipation bracket comprises solid materials with specific heat larger than air, including but not limited to heat-conducting engineering plastics and metal materials. Among the metal materials, aluminum which is light and has excellent heat conductivity is more preferable.

For convenience of assembly, the diameter of the cell perforation is slightly larger than the diameter of the cell. Compared with a solid-air heat transfer path, the solid direct contact heat transfer rate is higher, a heat conduction filling layer is arranged on the hole wall of the electric core through hole, and a gap between the hole wall and the electric core is filled to form an effective direct contact heat transfer structure.

The heat-conducting filling layer can be uniformly arranged along the circumferential direction of the hole wall, namely the heat-conducting filling layer is cylindrical and can also be arranged along the spiral, strip and net parts of the hole wall. The direct contact surfaces of the battery core, the heat-conducting filling layer and the heat dissipation support are gradually enlarged.

The material of heat conduction filling layer is the heat conduction material, and further preferred is heat-conducting glue, except filling the clearance and forming effective contact structure, still has the effect of fixed electric core.

Further, the heat dissipation support between first support and the second support is formed by at least two support units concatenation side by side, and further, still be provided with the concatenation interval between the support unit (the concatenation interval is formed by the rounding off edge of support unit, the radiating groove on support unit surface etc.), and above-mentioned concatenation interval also helps increasing the heat transfer area of heat dissipation support and air, forms more heat dissipation channel.

First heat dissipation through hole

The first heat dissipation through hole is used for increasing the heat exchange area between the heat dissipation support and the air or liquid cooling heat exchange element. The axial direction of the first heat dissipation through hole includes but is not limited to the axial direction parallel to the axial direction of the battery cell perforation, the axial direction perpendicular to the axial direction of the battery cell perforation or the axial direction of the battery cell perforation has a non-right angle included angle, and an effective heat dissipation channel is formed. The heat dissipation through holes also have the function of reducing the weight of the heat dissipation support. The heat dissipation support with the first heat dissipation through hole can be matched with a known module air-cooled liquid cooling assembly, and the heat dissipation effect is further optimized.

Preferably, the axial direction of the first heat dissipation through hole is consistent with the axial direction of the battery core perforation, and is opposite to the second heat dissipation through hole orifices of the first support and the second support, so as to form an effective heat dissipation channel as described above. Furthermore, because the battery core perforation is distributed in an array on the heat dissipation support, the first heat dissipation through holes are arranged between the battery core perforation in an array shape. Furthermore, the distance between the central axis of the first heat dissipation through hole and the central axis of the surrounding cell perforation is consistent.

Support connecting piece

The bracket connector comprises a locking member for detachably and fixedly connecting the first bracket, the heat dissipation bracket and the second bracket, and the bracket connector comprises but is not limited to a screw nut, a locking screw and other known locking members.

Insulating layer

Generally, the surface of the battery core is coated with an insulating plastic film, once the plastic film on the surface of the battery is damaged, the negative electricity of the battery shell is transmitted to the aluminum frame, and the danger of short circuit occurs. The insulating layer of the heat dissipation bracket can avoid the occurrence of the short circuit. The insulating layer is at least arranged on the hole wall of the electric core perforation and can also be uniformly distributed on the surface of the heat dissipation support. The connection mode of the heat dissipation bracket and the insulating layer includes, but is not limited to, fixed connection (coating, curing, bonding, etc.), and integral connection (the aluminum heat dissipation bracket forms an insulating aluminum oxide layer on the hole wall or the surface of the aluminum bracket through surface oxidation treatment).

Lithium ion battery module

The basic composition of the lithium ion battery module comprises: module support, a plurality of electricity core and the busbar of connecting electric core electrode. The third heat dissipation through holes in the bus bar, the first heat dissipation through holes in the heat dissipation support, the first support, and the second heat dissipation through holes in the second support form heat dissipation channels.

Example 1

As shown in fig. 1 to 3, the heat dissipation support of the cylindrical battery cell in embodiment 1 includes a first support 1 and a second support 2, both the first support 1 and the second support 2 are provided with a battery cell matching hole a, and further includes a heat dissipation support 3 sandwiched between the first support 1 and the second support 2, a battery cell perforation 31 is provided in the heat dissipation support 3, and the battery cell perforation 31 is axially consistent with the battery cell matching hole a of the first support 1 and has an opposite aperture.

The surface of the hole wall of the cell perforation 31 is provided with a heat-conducting filling layer b.

The heat dissipation support b is further provided with a first heat dissipation through hole 32 which is axially consistent with the battery cell perforation, the first support 1 and the second support 2 are provided with a second heat dissipation through hole c, and the orifices of the first heat dissipation through hole 32 and the second heat dissipation through hole c are opposite.

Embodiment 1 still includes bolt 4 nut, and the bolt is worn to establish in first support 1, heat dissipation support 3 and second support 2 in proper order and is provided with the pilot hole 33 that the drill way is relative, and the nut is connected with the screw thread end of bolt 4.

The heat dissipation bracket 3 is made of aluminum, and the insulating layer is an aluminum oxide layer; the radiating bracket 3 is formed by splicing two bracket units side by side.

Example 2

As shown in fig. 4, the heat dissipation bracket of the cylindrical battery cell in embodiment 2 also includes a heat dissipation bracket, and the heat dissipation bracket 3 is not provided with the first heat dissipation through hole 32, but is provided with only the assembly hole 33.

Example 3

As shown in fig. 5, a lithium ion battery module in embodiment 3 is based on the module support in embodiment 1, and further includes a battery cell 5 and a busbar 6 connected to the battery cell, where the battery cell 5 is disposed in the cell fitting hole a and the cell perforation 31, and the busbar is connected to an electrode of the battery cell;

the bus bar 6 is provided with a third heat dissipating through hole 61, and the third heat dissipating through hole 61 is opposite to the openings of the first heat dissipating through hole 32 and the second heat dissipating through hole c.

When the lithium ion battery module works, heat generated by the working of the battery cell 5 is conducted to the heat dissipation support 3 through the heat conduction filling layer b heat conduction adhesive layer, then is transmitted to the air of the first heat dissipation through hole 32 through the heat dissipation support 3, and is transmitted to the outside of the module through the second heat dissipation through hole c and the third heat dissipation through hole 61.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a heat dissipation support of cylinder electricity core, includes first support and second support, be provided with electric core mating holes in first support and the second support respectively, its characterized in that still includes the heat dissipation support of pressing from both sides between first support and the second support of locating, be provided with electric core in the heat dissipation support and perforate, electric core perforate with the electric core mating holes axial of first support is unanimous and the drill way is relative.

2. The heat dissipation support for cylindrical battery cells of claim 1, wherein a heat conductive filling layer is disposed on the surface of the perforated hole wall of the battery cell.

3. The heat dissipation bracket for a cylindrical battery cell according to claim 1, wherein the heat dissipation bracket is further provided with a first heat dissipation through hole, the first bracket and/or the second bracket is provided with a second heat dissipation through hole, and the first heat dissipation through hole and the second heat dissipation through hole have opposite apertures.

4. The cylindrical cell heat dissipation support of claim 3, wherein an axial direction of the first heat dissipation through hole is identical to an axial direction of the cell perforation.

5. The heat dissipation bracket for a cylindrical battery cell of claim 1, further comprising a bracket connection member, wherein the first bracket, the heat dissipation bracket and the second bracket are provided with assembly holes with opposite apertures, and the bracket connection member is inserted into the assembly holes.

6. The heat dissipation support for the cylindrical battery cell of claim 1 or 2, wherein an insulating layer is circumferentially arranged on a hole wall of the heat dissipation support.

7. The heat dissipation support of a cylindrical electrical core according to claim 6, wherein the heat dissipation support is made of aluminum, and the insulating layer is an aluminum oxide layer.

8. The cylindrical cell heat dissipation support of claim 1, wherein the heat dissipation support is formed by splicing at least two support units side by side.

9. A lithium ion battery module, comprising the heat dissipation support of a cylindrical battery cell of any one of claims 1 to 8, further comprising a battery cell and a busbar connected to the battery cell, wherein the battery cell is disposed in the battery cell mating hole and the battery cell perforation, and the busbar is connected to an electrode of the battery cell.

10. A lithium ion battery module, comprising the heat dissipation support of the cylindrical battery cell of claim 3 or 4, further comprising a battery cell and a busbar connected to the battery cell, wherein the battery cell is disposed in the battery cell mating hole and the battery cell perforation, the busbar is connected to the electrode of the battery cell, the busbar is provided with a third heat dissipation through hole, and the third heat dissipation through hole is opposite to the orifices of the first heat dissipation through hole and the second heat dissipation through hole.