WO2019024616A1

WO2019024616A1 - Thermal conduction component, large capacity battery provided with thermal conduction component and method for manufacturing same

Info

Publication number: WO2019024616A1
Application number: PCT/CN2018/091764
Authority: WO
Inventors: 许玉林; 龚晓冬; 王爱淑; 娄豫皖; 顾江娜; 张旭; 许祎凡
Original assignee: 苏州安靠电源有限公司
Priority date: 2017-08-03
Filing date: 2018-06-19
Publication date: 2019-02-07
Also published as: CN107403892A; CN107403892B

Abstract

Disclosed are a thermal conduction component, a large capacity battery provided with the thermal conduction component, and a method for manufacturing the large capacity battery. The thermal conduction component comprises a rigid thermal conductor, wherein a groove fitting with an outer wall face of a cylindrical battery is formed on a side of the rigid thermal conductor, a flexible thermal conductor housing chamber is formed on a groove wall of the groove, and a flexible thermal conductor is provided in the flexible thermal conductor housing chamber.In the present application, this type of thermal conduction component can closely contact the outer wall face of each cylindrical battery in a large capacity battery during use, increasing the heat transfer speed between the two, thus increasing the heat dispersion efficiency of the large capacity battery.

Description

Thermal conductive component, large-capacity battery configured with the same, and manufacturing method thereof

Technical field

The present application relates to the field of battery technologies, and in particular, to a heat conductive component for a battery, a large-capacity battery configured with the heat conductive component, and a method of manufacturing such a large-capacity battery.

Background technique

In today's economic development, electronic technology is at the forefront. A variety of versatile electronic devices represented by mobile phones have entered all aspects of people's daily lives and become a necessity. In order to reduce air pollution and protect the environment, cars that have always used fuel have also entered electrification, and the development of electric vehicles is in full swing.

All electrical equipment, especially electric vehicles, must be powered by a separate power source, the battery. Due to the space and weight of the equipment, the required batteries must be small in size, light in weight, high in energy and long in service life. Now, the battery with the highest specific energy, the best electrical performance and the longest service life is a variety of lithium-ion batteries, so the lithium-ion battery can be developed rapidly. However, lithium-ion batteries also have their short boards: safety is still poor, there is a danger of fire and explosion. The root cause of the fire is the use of a combustible organic electrolyte. The direct cause of the fire is thermal runaway, that is, the battery temperature rises unrestricted when the problem occurs, causing the positive active material to be liberated, and the active material and the positive electrode of the negative electrode in the charged state are released. The oxygen reacts violently, releasing more heat, and the temperature rises further, so repeatedly pushing until the explosion explodes. Therefore, controlling the battery temperature at an appropriate low level is one of the important means to ensure battery safety and extend the service life.

In order to reduce the temperature of the module, people have come up with many methods. First, the use of more efficient active substances and safer electrolytes has led to a lot of work in the research and development and production units of single cells. The modular assembly plant has made great efforts from another angle. For example, Gu Huanlong of Hsinchu County, Taiwan, proposed in the CN200910209710.4 patent to add thermal conductive glue made of refractory silica gel to the battery gap to help the battery to dissipate heat. For example, Zhang Hengyun and others of Shanghai University of Engineering and Technology have proposed in the CN201610144883.2 patent to add a heat-conducting pipe to the battery drain gap in the module, the battery is provided with a heat-conducting sleeve, and the heat-conducting sleeve and the heat-conducting pipe are bonded to each other. The heat is quickly transferred out. In the CN201610513906.2 patent, Ge Zengfang of Hong Kong Weilai Automobile proposed to use the liquid flow cooling method to cool down. The outer casing is provided with a fluid chamber and a flow guiding element. The flow guiding element has a plurality of tapered holes to accelerate the fluid passing through the hole and improve the transmission. Thermal efficiency. Luo Shixiong proposed in the CN206076444U patent that a heat sink made of graphene, graphene oxide and copper, aluminum and silver nanopowders is arranged outside the battery, but these materials are too expensive. The power supply also has a number of temperature control patents. For example, CN201610051223 proposes to adhere the battery to the middle of the module and add heat-absorbing phase change material and fire extinguishing agent. The phase change material phase change absorbs a large amount of heat and maintains the temperature unchanged. These measures have a very good effect.

However, the above various heat conduction and heat dissipation measures have the following problems more or less:

1. When the battery pack that does not take additional heat dissipation measures works, the temperature rises rapidly, and the temperature distribution is uneven, and the temperature difference between the batteries in different positions is large. A battery with a long-term high temperature decays rapidly, which causes an imbalance between the batteries and shortens the service life.

2, the use of thermal adhesive and battery direct contact, relying on the gel itself, the heat is still too slow.

3. The use of thermal conductive adhesive is generally pre-formed or injected into a pre-set container. It is difficult to make the thermal conductive adhesive and the battery casing have no gap contact, the thermal resistance of the gap is extremely high, and the overall heat transfer efficiency is low.

4, using fluid circulation cooling, especially liquid cooling, the effect is very good, the disadvantage is that the structure is complex, and the need for pumps and fans, these rotating parts are easy to damage, and additional energy consumption. The use of liquid working fluid, as well as liquid leakage The danger increases the difficulty of leak prevention.

Summary of the invention

The purpose of the present application is: In view of the above technical problems, the present application proposes a thermally conductive component that is more ingenious and rational in structure, and also provides a large-capacity battery configured with such a heat-conductive component and a method of manufacturing such a large-capacity battery. The heat conducting component can be in close contact with the outer wall surface of each cylindrical battery in the large-capacity battery, thereby greatly improving the heat transfer speed between the two, thereby improving the heat dissipation efficiency of the large-capacity battery.

The technical solution of the present application is:

The heat conducting component of the present application comprises a hard heat conductor, the side of the hard heat conductor is formed with a groove corresponding to the outer wall surface of the cylindrical battery, and the groove wall of the groove is formed with flexible heat conduction. The cavity is disposed, and the flexible heat conductor receiving cavity is provided with a flexible heat conductor.

The heat conducting component of the present application further includes the following preferred solutions based on the above technical solutions:

The flexible heat conductor receiving cavity is a blind hole formed on the groove groove wall.

The flexible heat conductor receiving cavity is a slit formed on the groove groove wall.

The groove and the groove are both through grooves extending from both ends of the length to the outside of the hard heat conduction body.

The groove wall surface of the groove is a circular arc surface.

A protrusion on a side away from the side of the flexible heat-conducting cavity is formed on the hard heat conductor.

A bent portion is formed on the hard heat conductor at the groove, and one side of the bent portion forms the flexible heat conductor receiving cavity, and the other side forms the protrusion.

The hard heat conductor is made of a metal material.

The hard heat conductor is made of aluminum.

The flexible heat conductor is a thermal conductive adhesive.

The hard heat conductive body is provided with an expansion hole penetratingly, and the flexible heat conductor receiving cavity is disposed radially outward of the expansion hole.

At least two of the expansion holes are disposed in the rigid heat conductor.

A total of at least three of the expansion holes are disposed in the rigid heat conductor.

a part of the radially outer side of the expansion hole is provided with four flexible heat-conducting body accommodating cavities, and the four flexible heat-conducting body accommodating cavities are distributed in a square shape centering on the hole axis of the expansion hole; Two flexible heat-conducting accommodating cavities are disposed on a radially outer side of the dimples.

The through holes of the four flexible heat-conducting accommodating cavities are disposed on the outer side of the radial direction, and are the square holes; the through-holes of the two flexible heat-conducting body accommodating cavities are disposed on the outer side of the radial direction, and are triangular holes.

The hole of the hole of the expansion hole is formed with a protrusion located on the inner side of the flexible heat-conducting body accommodating cavity in the radial direction of the expansion hole.

Forming a bent portion between the groove and the expansion hole on the hard heat conductor, the bent portion forming the flexible heat conductor receiving cavity near a side of the groove, The protrusion is formed on a side of the bent portion close to the expansion hole.

The large-capacity battery proposed by the present application comprises a plurality of cylindrical cells distributed in a matrix and a gap formed between the cylindrical batteries, characterized in that it further comprises a heat conducting component of the above structure, the heat conducting component is inserted Provided in the slit, and deforming the hard heat conductor by squeezing the hard heat conductor to cause the flexible heat conductor in the flexible heat conductor accommodating cavity to overflow outwardly Tightly packed between the hard heat conductor and the cylindrical battery.

The large-capacity battery of the present application further includes the following preferred solutions on the basis of the above technical solutions:

Also included is a battery case in which each of the cylindrical batteries is housed, and the hard heat conductor is in contact with the inner wall of the battery case.

Also included is a battery holder on which a plurality of battery insertion holes are provided, each of the cylindrical batteries being respectively inserted in the battery insertion hole.

The method for manufacturing a large-capacity battery of the structure of the present application includes: inserting the heat-conductive component into the slit along an axial direction of the cylindrical battery, and pressing the hard heat conductor to make the hard The thermal conductor is deformed. Due to the deformation of the hard heat conductor, the volume of the flexible heat-conducting cavity is reduced due to the deformation of the hard heat conductor, so that the flexible heat conductor therein overflows and is closely filled. Between the hard heat conductor and the cylindrical battery.

The method for manufacturing such a large-capacity battery proposed by the present application further includes the following preferred solutions on the basis of the above technical solutions:

Inserting an expansion device into the expansion hole of the hard heat conductor, and radially extruding the hole wall of the expansion hole by the expansion action of the expansion device, thereby generating the hard heat conductor The deformation.

The projection at the wall of the expansion hole is radially outwardly pressed by the expansion action of the expansion device.

The advantages of this application are:

1. The heat conducting component of the present application, after being inserted into the gap between the battery cells of the large-capacity battery, deforms the hard heat conductor by pressing the hard heat conductor, and under the deformation of the hard heat conductor, The flexible heat-conducting accommodating chamber has a reduced volume such that the flexible thermal conductor therein overflows outwardly and is tightly packed between the hard thermal conductor and the battery cell (also referred to as the cylindrical battery of the present application). In this way, the heat conducting component can be in close contact with the outer wall surface of each battery cell in the large-capacity battery, thereby improving the heat transfer speed of the heat conducting component to the battery, thereby improving the heat dissipation efficiency of the large-capacity battery.

2. When a plurality of heat-conducting components of such a structure are loaded into a large-capacity battery, they are pressed together with each battery cell in the large-capacity battery, thereby improving the overall structural strength and stability of the large-capacity battery. Effectively prevent battery cells from loosening.

3. A protrusion on the side away from the side of the flexible heat-conducting cavity is formed on the hard heat conductor. When assembling, the protrusion can be pressed to cause only a large deformation of the hard heat conductor at the protrusion (the other part is not deformed, or the deformation is small), so that the protrusion faces the flexible heat conductor. One side is moved and deformed, so that the volume of the flexible heat-conducting accommodating cavity is reduced, and the thermal conductive adhesive is extended from the flexible heat-conducting accommodating cavity to be filled between the rigid heat-conducting body groove and the cylindrical battery. Compared with the one side surface of the integrally extruded hard heat conductor, in order to reduce the volume of the flexible heat-conducting accommodating cavity and expand the thermal conductive adhesive from the flexible heat-conducting accommodating cavity, the thermal conductive adhesive is made from the flexible thermal conductive body. The manner of extending the overflow in the cavity is simply by squeezing the protrusion of the flexible heat-conducting body away from the side to extend the thermal conductive glue from the flexible heat-conducting cavity.

4. Further, on the hard heat conductor, a circular arc-shaped bent portion is formed at the groove, and one side of the bent portion forms the flexible heat-conducting body accommodating cavity, and the other side forms the above-mentioned Raised. The bent structure is more susceptible to deformation when pressed by an external force, so that the thermal conductive adhesive is more easily extended and overflowed between the rigid heat conductor groove and the cylindrical battery.

5. The expansion hole structure is arranged in the hard heat conductor, so that the assembly personnel can support the large expansion hole through the expansion device, thereby realizing the extrusion deformation of the hard heat conductor, which facilitates the heat conduction component in the large capacity battery. installation.

6. The radially outer side of the expansion hole is provided with a plurality of flexible heat-conducting body accommodating cavities, and each of the expansion holes has a large expansion hole, so that the heat-conducting component is in close contact with a plurality of cylindrical batteries at the same time, and the installation efficiency is greatly improved.

7. After loading a plurality of heat-conducting components in the large-capacity battery, each battery cell in the large-capacity battery is thermally connected through the heat-conducting components. Once the temperature of a certain battery cell is too high, the heat can pass through the heat-conducting component. The rapid transfer to other surrounding battery cells ensures the uniformity of the temperature of each battery cell in the cylindrical battery.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the description of the embodiments will be briefly described below. The drawings in the following description are only some embodiments of the present application, which are common in the art. For the skilled person, other drawings can be obtained from these drawings without any creative work.

1 is a schematic structural view of a heat conducting component of a first embodiment of the present application when it is matched with a cylindrical battery and has not been subjected to extrusion deformation;

Figure 2 is an enlarged view of a portion A of Figure 1;

3 is a schematic structural view of a heat conducting component that is matched with a cylindrical battery and is extruded and deformed according to Embodiment 1 of the present application;

Figure 4 is an enlarged view of a portion C of Figure 3;

FIG. 5 is a schematic perspective structural view of the heat-transducing component of the first embodiment of the present application when it is loaded into a large-capacity battery, but has not been subjected to extrusion deformation;

6 is a top view of the heat conducting component of the first embodiment of the present application when it is loaded into a large-capacity battery, but has not been subjected to extrusion deformation;

Figure 7 is an enlarged view of a portion D of Figure 6;

FIG. 8 is a schematic perspective view showing the heat-transmissive component of the first embodiment of the present invention after being loaded into a large-capacity battery and being extruded and deformed;

9 is a top view of the heat-conducting component of the first embodiment of the present application when it is loaded into a large-capacity battery and is pressed and deformed;

Figure 10 is an enlarged view of a portion E of Figure 9;

FIG. 11 is a schematic structural view of a heat conducting component according to Embodiment 2 of the present application (without being subjected to extrusion deformation).

Of which: 1-hard thermal conductor, 101-groove, 102-flexible heat-conducting cavity, 103-expanded hole, 104-protrusion, 2-flexible thermal conductor, 3-cylindrical battery, 4-gap, 5 - Battery fixture, 6-expansion device.

Detailed ways

The present application will be further described in detail below with reference to the accompanying drawings. The present application can be implemented in many different forms and is not limited to the embodiments described in this embodiment. The following detailed description is provided to facilitate a more thorough understanding of the disclosure of the present disclosure, wherein the words indicating the orientations of the top, the bottom, the left, the right, and the like are only for the position of the illustrated structure in the corresponding drawings.

However, one skilled in the art may realize that a detailed description of one or more of the details may be omitted, or other methods, components or materials may be employed. In some instances, some implementations are not described or described in detail.

In addition, the technical features and technical solutions described herein may also be combined in any suitable manner in one or more embodiments. It will be readily apparent to those skilled in the art that the steps or sequence of operations of the methods associated with the embodiments provided herein may also vary. Therefore, any order in the drawings and embodiments is merely illustrative, and is not intended to be in a

As used herein, "connected", unless otherwise specified, includes both direct and indirect connections (joining).

Embodiment 1:

1 to 10 illustrate a specific application example of the heat conducting component of the present application in a large-capacity battery (also referred to as a battery module in the industry). The heat conducting component comprises a hard heat conductor 1, and a side of the hard heat conductor 1 is formed with a plurality of grooves 101 adapted to the outer wall surface of the cylindrical battery, and a flexible heat conductor is formed on the groove wall of each groove 101. The cavity 102 is accommodated, and a flexible heat conductor 2 is disposed within the flexible heat conductor receiving cavity 102. The large-capacity battery includes a battery holder 5 having a plurality of battery insertion holes, a plurality of cylindrical batteries 3 respectively inserted in the respective battery insertion holes, and each of the battery insertion holes is distributed in a matrix on the battery holder 5, so that the battery is inserted. The respective cylindrical batteries 3 housed in the battery holder 5 are also arranged in a matrix. And these cylindrical batteries 3 are arranged at a distance in the radial direction, so that a slit 4 is formed between the respective cylindrical batteries 3. In the present embodiment, the cylindrical battery 3 is a lithium ion battery.

In practical application, as shown in FIG. 1 to FIG. 2 and FIG. 5 to FIG. 7 , the heat conducting component is inserted into the slit 4 along the axial direction of the cylindrical battery 3, and the groove 101 on the heat conducting component is just aligned with the cylinder. The outer circumferential wall surface of the battery 3 is arranged. Referring to FIGS. 3 to 4 and 8 to 10, the hard heat conductor 1 of the heat conducting component is pressed by an external force provided by the pressing device, thereby causing irreversible deformation of the hard heat conductor 1, and the flexible heat conductor The accommodating cavity 102 is also deformed and its volume is reduced, so that the flexible heat conductor 2 in the flexible heat-conducting accommodating cavity 102 overflows outwardly and closely fills the hard heat conductor 1 and the cylindrical battery 3. More specifically, the outwardly overflowing flexible heat conductor 2 is filled between the groove 101 of the hard heat conductor 1 and the cylindrical battery 3. This ensures reliable contact of the heat conducting component with the cylindrical battery, and has a large contact area, which improves the heat transfer rate between the two, so that the heat conducting component can quickly transfer the heat of the cylindrical battery 3, Avoid excessive battery temperature. Moreover, because of the loading of the plurality of heat-conducting components, each of the battery cells (ie, the cylindrical battery) in the large-capacity battery is thermally connected through the heat-conducting components, and once the temperature of a certain cylindrical battery is too high, Heat can be quickly transferred to other surrounding cylindrical batteries through the heat conducting component, ensuring uniformity of temperature of each battery cell in the cylindrical battery.

The term "irreversible deformation" as used in the present application means that the deformation of the hard heat conductor 1 due to the pressing action cannot be restored to its original state, unlike springs and rubbers.

In practical applications, the above heat conducting components are usually connected to external heat dissipation or heat absorbing devices to transfer the heat of each cylindrical battery to the heat dissipation or heat absorbing device. The large-capacity battery is usually housed in a metal battery case to form a box battery. We can connect the hard heat conductor 1 of the heat-conducting component to the inner wall of the battery case to transfer heat to the battery box, and then The battery box is distributed to the outside atmosphere.

It should be noted that, when the heat conducting component is assembled into the above-mentioned large-capacity battery, the flexible heat conductor 2 may be disposed in advance in the flexible heat conductor accommodating cavity 102 of the heat conductive component, and then the heat conductive component to be provided with the flexible heat conductor 2 The cartridge 4 is inserted into the gap 4 of the large-capacity battery, and finally the heat-conductive assembly is pressed. It is also possible to first insert a heat conducting component (ie, a hard heat conductor) that has not been provided with the flexible heat conductor 2 into the slot 4 of the large-capacity battery, and then fill the flexible heat conductor receiving cavity 102 with the flexible heat conductor 2, and finally The heat conducting assembly is extruded. In order to reduce the difficulty of installation, the former assembly method is usually adopted.

In the present embodiment, the hard heat conductor 1 of the heat conducting component is generally made of a metal material having good thermal conductivity, preferably aluminum. The flexible thermal conductor 2 is preferably a thermal conductive adhesive having a certain adhesive property, and the thermal conductive adhesive is deformed as a whole when subjected to an external force - the ductility is good, and no part of the thermal conductive adhesive is subjected to the force from the thermally conductive component. The problem of getting out of it.

In order to enable the heat conducting component to be inserted into the interior of the large-capacity battery and approach or even contact the battery fixture 5, the present embodiment sets the groove 101 on the hard heat conductor to extend beyond the hard heat conductor 1 at both ends of the length. Channel structure.

The term "the groove corresponding to the outer wall surface of the cylindrical battery" as mentioned above means that the groove 101 can accommodate (partially accommodate) the cylindrical battery 3 when the heat conducting component is inserted into the slit 4 of the large-capacity battery. The groove wall surface of 101 is located radially outward of the outer wall surface of the cylindrical battery 3. Therefore, the groove 101 can be disposed in any shape if the above requirements are met. In the embodiment, the groove 101 is a circular arc groove, that is, the groove wall surface is a circular arc surface. The groove 101 is arranged in a circular arc groove, which has the following two advantages:

First, only the size of the groove 101 is pre-designed, and it can be ensured that the groove wall surface of the groove 101 can be as close as possible to the outer wall surface of the cylindrical battery 3 after the heat conducting component is inserted into the gap 4 of the large-capacity battery, reducing The amount of thermal adhesive is used to save costs.

Secondly, when the heat conducting component is installed in the gap 4 of the large-capacity battery, a gap of a circular arc with a uniform thickness is formed between the groove wall surface of the groove 101 and the outer wall surface of the cylindrical battery 3, and the gap is uniform. It is more convenient for the thermal conductive adhesive to be deformed therein to ensure that the thermal conductive adhesive can be continuously filled in a large area between the cylindrical battery and the hard heat conductor 1.

In the embodiment, the flexible heat-conducting body accommodating cavity 102 is a notch formed on the groove wall of the groove 101, and the groove is a groove structure extending at both ends of the length to the outside of the hard heat conductor 1. .

In some other embodiments of the present application, the flexible heat-conducting accommodating cavity 102 may also be a blind hole formed on the groove wall of the groove 101, and the above-mentioned thermal conductive adhesive is disposed in the blind hole. The heat conductor 1 makes the blind hole small (shallow), and the thermal conductive adhesive is deformed (overflow) to be filled between the hard heat conductor and the cylindrical battery.

Moreover, in the embodiment, the protrusions 104 on the side away from the side of the flexible heat conductor accommodating chamber 102 are formed on the hard heat conductor 1. When assembling, the protrusion 104 can be pressed to cause only a large deformation of the hard heat conductor 1 at the protrusion 104 (the remaining portion is not deformed, or the deformation is small), so that the protrusion 104 is directed to the flexible heat conductor. The side of the accommodating cavity 102 is moved and deformed, so that the volume of the flexible heat-conducting accommodating cavity 102 is reduced, and the thermal conductive adhesive extends from the accommodating cavity of the flexible heat-conducting body and is filled between the groove of the hard heat-conducting body and the cylindrical battery. .

It is not difficult to understand that the heat conduction of the flexible heat-conducting accommodating cavity 102 is reduced and the thermal conductive adhesive is extended from the flexible heat-conducting accommodating cavity to prevent heat conduction. The manner in which the glue extends from the flexible heat-conducting accommodating cavity is simply by squeezing the protrusion 104 of the flexible heat-conducting accommodating cavity 102 away from the side to extend the thermal conductive adhesive from the flexible heat-conducting accommodating cavity. many.

More specifically, in the embodiment, the hard heat conductor 1 is formed with a circular arc-shaped bent portion at the groove 101, and one side of the bent portion forms the flexible heat-conducting body. The cavity 102 has the other side forming the aforementioned projections 104. Such a bent structure is more susceptible to deformation when pressed by an external force.

A plurality of expansion holes 103 are formed in the hard heat conductor 1 , and the flexible heat conductor receiving cavity 102 is disposed radially outward of the expansion hole 103 .

The structure of the expansion hole 103 is provided in the hard heat conductor 1 in order to facilitate the extrusion deformation of the hard heat conductor 1. Specifically, when the heat conduction component is inserted into the slit 4, the expansion device 6 (such as the expansion tube) can be The shaft is inserted into the expansion hole 103 of the hard heat conductor 1, and the hole wall of the expansion hole 103 is radially outwardly pressed by the expansion operation of the expansion device, thereby deforming the hard heat conductor 1 in Under the deformation of the hard heat conductor 1, the flexible heat-conducting body accommodating cavity 102 is also deformed and its volume is reduced, so that the flexible heat conductor 2 therein overflows and is tightly filled in the hard heat conductor 1 and the cylinder. Between the batteries 3 .

Further, the above-mentioned protrusions 104 are formed on the wall of the hole with the expansion hole 103. Further, in the radial direction of the expansion hole 103, the projection 104 is located just inside the flexible heat conductor receiving cavity 102. Naturally, the above-mentioned circular arc-shaped bent portion is naturally formed between the expansion hole 103 and the flexible heat-conducting body accommodating cavity 102, and the bent portion is adjacent to the groove 101 side to form the above-mentioned flexible heat-conducting body accommodating cavity 102, The protrusion 104 is formed on the side of the bent portion close to the expansion hole 103.

During the assembly of the heat-conducting component and the large-capacity battery, it is only necessary to use the expansion device to directly press the protrusion 104 at the hole wall of the expansion hole 103 without the need to integrally press the entire inner wall of the expansion hole 103. It is very convenient to quickly realize the sealing and filling of the thermal conductive adhesive between the hard thermal conductor and the cylindrical battery.

In the present example, at least 7 of the above-mentioned expansion holes 103 are disposed in the hard heat conductor 1, wherein the two expansion holes 103 at both ends of the length are triangular holes of approximately triangular shape, and five in the middle The dimples 103 are square holes that are approximately square. In general, it is preferable to provide two or more expansion holes in the hard heat conductor 1 so that it can be in contact with a plurality of batteries. Of course, only one expansion hole 103 may be provided in the hard heat conductor 1.

In FIG. 1, four flexible heat-conducting accommodating cavities 102 are disposed on the radially outer side of the five expanding holes 103 in the middle, and the four flexible heat-conducting accommodating cavities 102 are squared around the axis of the hole of the dimples 103. distributed. Two flexible heat conductor accommodating cavities 102 are disposed on the radially outer sides of the two expansion holes 103 at both ends.

Embodiment 2:

Referring to FIG. 11, in the embodiment, the heat conducting component also includes a hard heat conductor 1, and a side portion of the hard heat conductor 1 is formed with a plurality of (four) grooves 101 adapted to the outer wall surface of the cylindrical battery. A flexible heat conductor accommodating cavity 102 is formed on the groove wall of each groove 101, and a flexible heat conductor 2 is disposed in the flexible heat conductor accommodating cavity 102. The main difference between the embodiment and the heat conducting component of the first embodiment is that only one expanding hole 103 is provided in the hard heat conductor 1. When the heat-conducting module is loaded into a large-capacity battery and is extruded and deformed, it comes into contact with four cylindrical batteries.

The above embodiments are only for explaining the technical concept and the features of the present application, and the purpose of the present invention is to enable the understanding of the contents of the present application and the implementation of the present application. Equivalent transformations or modifications made in accordance with the spirit of the main technical solutions of the present application are intended to be included within the scope of the present application.

Claims

A heat conducting component, comprising: a hard heat conductor (1), a side portion of the hard heat conductor (1) is formed with a groove (101) adapted to an outer wall surface of the cylindrical battery, the groove A flexible heat conductor accommodating cavity (102) is formed in the groove wall of (101), and a flexible heat conductor (2) is disposed in the flexible heat conductor accommodating cavity (102).
The thermally conductive assembly of claim 1 wherein said flexible thermally conductive housing cavity (102) is a blind bore formed in the groove wall of said recess (101).
The thermally conductive assembly of claim 1 wherein said flexible heat conductor receiving cavity (102) is a recess formed in the groove wall of said recess (101).
The heat conducting assembly according to claim 3, wherein the groove (101) and the slit are both through grooves extending from both ends of the length to the outside of the hard heat conductor (1).
The heat conducting assembly according to claim 4, wherein the groove wall surface of the groove (101) is a circular arc surface.
The heat conducting assembly according to claim 1, wherein the hard heat conductor (1) is formed with a protrusion (104) on a side away from the side of the flexible heat conductor receiving cavity (102).
The heat conducting assembly according to claim 6, wherein a bent portion is formed on the hard heat conductor (1) at the groove (101), and one side of the bent portion forms the The flexible heat conductor receives the cavity (102) and the other side forms the protrusion (104).
The thermally conductive component according to claim 1, characterized in that the hard heat conductor (1) is made of a metal material.
The thermally conductive component according to claim 8, characterized in that the hard heat conductor (1) is made of aluminum.
The thermally conductive component of claim 1 wherein said flexible thermal conductor (2) is a thermally conductive adhesive.
The heat conducting assembly according to claim 1, wherein the hard heat conductor (1) is provided with an expansion hole (103), and the flexible heat conductor receiving cavity (102) is disposed in the expansion hole. Radial outer side of (103).
The thermally conductive component according to claim 11, characterized in that at least two of said expansion holes (103) are provided in said hard heat conductor (1).
The thermally conductive component according to claim 12, characterized in that at least three of said expansion holes (103) are provided in said hard heat conductor (1).
The heat-conducting assembly according to claim 12, wherein a part of the expansion holes (103) is provided with four flexible heat-conducting accommodating cavities (102) on a radially outer side, and the four flexible heat-conducting bodies are accommodated. The chamber (102) is distributed in a square shape centering on the hole axis of the expansion hole (103); and the other portion of the expansion hole (103) is disposed on the radially outer side of the flexible heat-conducting body receiving chamber (102).
The heat-conducting assembly according to claim 14, wherein the expansion holes (103) of the four flexible heat-conducting accommodating cavities (102) are disposed radially outward, and are square holes; The expansion holes (103) of the two flexible heat-conducting accommodating cavities (102) are triangular holes.
The heat transfer assembly according to claim 15, wherein the hole wall of the expansion hole (103) is formed on the inner side of the flexible heat conductor receiving cavity (102) in the radial direction of the expansion hole. Raised (104).
The heat conducting assembly according to claim 16, wherein the hard heat conductor (1) is formed with a bent portion between the groove (101) and the expansion hole (103), The flexible heat-conducting accommodating cavity (102) is formed on a side of the bent portion near the groove (101), and the convex portion forms the protrusion (104) near a side of the bulging hole (103). ).
A large-capacity battery comprising a plurality of cylindrical cells (3) distributed in a matrix and a slit (4) formed between the cylindrical batteries (3), characterized in that it further comprises the following claims 1 to 17 A thermally conductive component according to any of the preceding claims, said thermally conductive component being interposed in said slit (4), and said hard thermal conductor (1) being produced by extruding said hard thermal conductor (1) Deformation in such a manner that the flexible heat conductor (2) in the flexible heat-conducting accommodating cavity (102) overflows outwardly to closely fill the hard heat conductor (1) and the cylindrical battery (3) )between.
The large-capacity battery according to claim 18, further comprising a battery case in which each of said cylindrical batteries (3) is housed, said hard heat conductor (1) and said battery case The inner wall is in contact with the connection.
A large-capacity battery according to claim 18, further comprising a battery holder (5) on which a plurality of battery insertion holes are provided, each of said cylindrical batteries (3) being respectively inserted in said battery insertion Installed in the hole.
A method of manufacturing a large-capacity battery according to claim 18, comprising:

Inserting the heat conducting component into the slit (4) along an axial direction of the cylindrical battery (3), pressing the hard heat conductor (1) to make the hard heat conductor (1) Deformation, the flexible heat-conducting accommodating cavity (102) has a small volume such that the flexible thermal conductor (2) therein overflows outwardly and closely fills the hard thermal conductor (1) and the cylinder Between the battery (3).
The method of manufacturing a large-capacity battery according to claim 21, wherein the expansion device is inserted into the expansion hole (103) of the hard heat conductor (1), and the expansion operation of the expansion device is performed. The wall of the hole of the expansion hole (103) is pressed radially outward, so that the hard heat conductor (1) produces the deformation.
The method of manufacturing a large-capacity battery according to claim 22, wherein the protrusion (104) at the wall of the hole of the expansion hole (103) is radially outwardly pressed by the expansion action of the inflation device.