CN209804727U - Heat absorption strip and battery module with same - Google Patents

Abstract

The application discloses heat absorption strip and dispose battery module of this heat absorption strip, wherein the heat absorption strip includes the heat absorption strip body of banding, this internal closed inner chamber that is provided with of heat absorption strip, sealed filling has heat absorbing material or/and heat conduction material in the closed inner chamber, the surface of heat absorption strip body be provided with a plurality of along the length direction of this heat absorption strip body parallel interval arrangement in proper order, and with the cambered surface type recess of cylindrical battery monomer surface looks adaptation. This kind of heat absorbing strip of this application can absorb each free heat of battery in the module to prevent battery thermal runaway, can also transmit away its absorptive heat rapidly simultaneously.

Description

Heat absorption strip and battery module with same

Technical Field

the application relates to the technical field of battery thermal management, in particular to a heat absorption strip and a battery module with the heat absorption strip.

Background

In the prior art, in order to avoid the temperature of the battery monomer in the battery module to be too high, a manufacturer can clamp the metal heat conducting sheet in the gap of the battery module and connect the end part of the metal heat conducting sheet with the external heat exchanger in a heat conducting manner. The metal heat conducting sheet is clamped in the gap of the module and is contacted with the battery cells on two sides. When the temperature of the battery monomer is higher, the heat of the battery monomer is absorbed by the metal heat conducting sheet and is transferred to an external heat exchanger, and the heat is led out by the heat exchanger.

The metal heat conducting sheet has a relatively high heat conductivity coefficient, but the specific heat capacity is small, so that the metal heat conducting sheet only has the function of conducting the battery heat to the heat exchanger, and can not absorb the battery heat in a large amount and store the battery heat in the metal heat conducting sheet. Therefore, once the external heat exchanger loses efficacy, the heat of the battery module can rise rapidly, and potential safety hazards exist.

In addition, although the thermal conductivity of the pure metal heat conducting sheet is not very small, it is still difficult to meet the requirement of rapid heat transfer, and when the battery rises too fast, it cannot lead out the heat of the battery quickly.

Disclosure of Invention

The purpose of the application is: to the problem, a heat absorbing strip and a battery module with the heat absorbing strip are provided, the heat absorbing strip can absorb heat of each battery in the module, so that thermal runaway of the battery is prevented, and meanwhile, the absorbed heat can be rapidly transmitted out.

The technical scheme of the application is as follows:

A heat absorption strip comprises a strip-shaped heat absorption strip body, a closed inner cavity is arranged in the heat absorption strip body, heat absorption materials or/and heat conduction materials are filled in the closed inner cavity in a sealing mode, and a plurality of cambered grooves which are sequentially arranged in parallel at intervals along the length direction of the heat absorption strip body and are matched with the outer surface of a cylindrical battery monomer are arranged on the outer surface of the heat absorption strip body.

On the basis of the technical scheme, the heat absorbing strip further comprises the following preferable scheme:

The two opposite side surfaces of the heat absorption strip body in the thickness direction are provided with the cambered grooves.

the heat absorption strip body is made of metal.

The heat absorbing strip body with the cambered surface type groove and the closed inner cavity is formed by extruding a square flat aluminum tube with two sealed ends.

The closed inner cavity comprises a plurality of cavities which are mutually isolated, and the cavities are sequentially arranged at intervals along the length direction of the heat absorbing strip body.

Each cambered surface type recess all sets up adjacent two between the cavity.

Each cambered surface type groove is arranged along the length direction of the heat absorbing strip body at equal intervals, and each cavity is arranged along the length direction of the heat absorbing strip body at equal intervals.

the heat absorbing material is a phase change material.

A battery module comprises a plurality of battery monomers distributed in a matrix shape and gaps formed among the battery monomers, wherein heat absorbing strips of the structure are inserted into the gaps, and the outer surfaces of the battery monomers are abutted and contacted with the wall of an arc-shaped groove.

the application has the advantages that: this kind of heat absorption strip simple structure of this application, easy preparation can install to the battery module very conveniently, and it can absorb each free heat of battery in the module to prevent battery thermal runaway, can also transmit away its absorptive heat rapidly simultaneously.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic overall structure diagram of a battery module according to an embodiment of the present disclosure;

Fig. 2 is a perspective cross-sectional view of a battery module according to an embodiment of the present disclosure;

Fig. 3 is a plan sectional view of a battery module according to an embodiment of the present invention;

fig. 4 is a schematic perspective view of a heat sink strip in a second embodiment of the present application;

fig. 5 is a side view of a heat sink strip in accordance with a second embodiment of the present application;

Wherein: 1-heat absorption strip body, 101-closed inner cavity, 102-cambered surface type groove, 2-battery monomer and 3-battery clamp.

Detailed Description

The present application will be described in further detail below with reference to the accompanying drawings by way of specific embodiments. The present application may be embodied in many different forms and is not limited to the embodiments described in the present embodiment. The following detailed description is provided to facilitate a more thorough understanding of the present disclosure, and the words used to indicate orientation, top, bottom, left, right, etc. are used solely to describe the illustrated structure in connection with the accompanying figures.

One skilled in the relevant art will recognize, however, that one or more of the specific details can be omitted, or other methods, components, or materials can be used. In some instances, some embodiments are not described or not described in detail.

Furthermore, the technical features, aspects or characteristics described herein may be combined in any suitable manner in one or more embodiments. It will be readily appreciated by those of skill in the art that the order of the steps or operations of the methods associated with the embodiments provided herein may be varied. Thus, any sequence in the figures and examples is for illustrative purposes only and does not imply a requirement in a certain order unless explicitly stated to require a certain order.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).

The first embodiment is as follows:

fig. 1 to 3 show a preferred embodiment of the battery module of the present application, which is similar to a conventional battery module, and the module also includes two battery clamps 3 made of plastic material, the battery clamps are provided with battery insertion holes distributed in a matrix, each battery insertion hole is inserted with a cylindrical single battery 2, because the battery insertion holes are distributed in a matrix, the single batteries 2 are also distributed in a matrix, and a plurality of criss-cross gaps are formed between the single batteries 2.

The key improvement of the present embodiment is that a heat absorbing strip for absorbing heat of the battery cells 2 is inserted into the gap, the heat absorbing strip includes a strip-shaped heat absorbing strip body 1 made of metal, the heat absorbing strip body 1 is not a solid structure, but a closed inner cavity 101 is arranged in the heat absorbing strip body, and a heat absorbing material and a heat conducting material are hermetically filled in the closed inner cavity 101. In addition, the outer surface of the heat absorbing strip body 1 is provided with a plurality of cambered surface type grooves 102 which are sequentially arranged in parallel at intervals along the length direction of the heat absorbing strip body 1 and are matched with the outer surface of the cylindrical battery cell. The outer surface of the battery cell 2 is in abutting contact with the groove wall of the arcuate-surface-type groove 102.

Specifically, the two opposite side surfaces of the heat absorbing strip body 1 in the thickness direction thereof are provided with the cambered grooves 102. Thus, when the battery pack is inserted into the gap of the battery module, good contact with the battery cells on both sides can be formed.

The heat absorbing strip body 1 is made of aluminum, and the manufacturing method of the heat absorbing strip comprises the following steps: after heat absorbing materials or/and heat conducting materials are filled into a pipe cavity of the square flat aluminum pipe, pipe openings at two ends of the square flat aluminum pipe are sealed, and then the square flat aluminum pipe is extruded by utilizing pressure equipment, so that a heat absorbing strip body 1 with cambered grooves 102 at two sides, a closed inner cavity in the inner part and heat absorbing materials or/and heat conducting materials filled in the closed inner cavity is formed.

When the temperature of the battery monomer in the module is higher, the heat of the battery can be transferred to the heat absorbing strips and absorbed by the heat absorbing material in the heat absorbing strips, so that the temperature of the battery is prevented from accumulating and rising, and the thermal runaway of the battery is prevented.

Moreover, a heat exchanger arranged in contact with the heat absorption strip can be arranged outside the battery module, the heat absorption strip body 1 made of metal and heat conduction materials in the heat absorption strip body 1 are used for rapidly transferring the heat of the battery to the external heat exchanger, and the heat is taken out by the external heat exchanger.

Of course, only the heat absorbing material or only the heat conducting material can be filled in the closed inner cavity, so that the heat absorbing strip has excellent heat absorbing performance or heat conducting performance.

Considering that the battery cells in the same row in the battery module are generally uniformly arranged at equal intervals, correspondingly, the arc-shaped grooves 102 are equidistantly arranged along the length direction of the heat absorbing strip body 1, and the cavities are equidistantly arranged along the length direction of the heat absorbing strip body 1.

The heat absorbing material filled in the closed inner cavity is preferably a phase change material, the phase change material only undergoes a phase change reaction after absorbing a certain amount of heat, and the temperature of the phase change material is kept unchanged, which is very beneficial to the temperature control of the battery module.

Example two:

fig. 4 and 5 show a specific embodiment of the heat absorbing strip structure of the present application, and unlike the heat absorbing strip of the first embodiment, the enclosed cavity 101 in the heat absorbing strip body 1 includes a plurality of independent cavities isolated from each other, and the cavities are sequentially arranged at intervals along the length direction of the heat absorbing strip body 1. When the square flat aluminum pipe is manufactured, only the square flat aluminum pipe needs to be extruded in a segmented mode, and an original pipe cavity in the square flat aluminum pipe can be divided into a plurality of small cavities which are independent of each other. The closed inner cavity 101 in the first embodiment is a through cavity which is equivalent to the length dimension of the heat absorbing strip body.

Each cambered surface type groove 102 at the side part of the heat absorbing strip body 1 is arranged between two corresponding adjacent cavities. Thus, the heat of the battery cells arranged in contact with each arc-shaped groove 102 can be quickly transferred to the heat conducting and absorbing materials in the small cavities on the two sides after being absorbed by the groove walls.

The above embodiments are only for illustrating the technical concepts and features of the present application, and the purpose of the embodiments is to enable people to understand the content of the present application and implement the present application, and not to limit the protection scope of the present application. All equivalent changes and modifications made according to the spirit of the main technical scheme of the application are covered in the protection scope of the application.

Claims (9)

1. The heat absorption strip comprises a strip-shaped heat absorption strip body (1), and is characterized in that a closed inner cavity (101) is arranged in the heat absorption strip body (1), a heat absorption material or/and a heat conduction material is filled in the closed inner cavity (101) in a sealing mode, and a plurality of cambered grooves (102) which are sequentially arranged in parallel at intervals along the length direction of the heat absorption strip body (1) and are matched with the outer surface of a cylindrical battery monomer are arranged on the outer surface of the heat absorption strip body (1).

2. Absorber strip according to claim 1, wherein the curved groove (102) is provided on both opposite sides of the absorber strip body (1) in the thickness direction.

3. Absorber strip according to claim 1, wherein the body (1) of the strip is of metal.

4. Absorber strip according to claim 1, wherein the body (1) of the absorber strip with the curved grooves (102) is formed by extrusion of a square flat aluminium tube closed at both ends.

5. Absorber strip according to claim 1, characterized in that the closed inner cavity (101) comprises a plurality of mutually isolated chambers, which are arranged at intervals in succession along the length of the absorber strip body (1).

6. Receiver strip according to claim 5, characterized in that each of said curved recesses (102) is arranged between two adjacent cavities.

7. absorber strip according to claim 6, wherein each of the grooves (102) is arranged equidistantly along the length of the body (1) and each of the cavities is arranged equidistantly along the length of the body (1).

8. The heat sink strip of claim 1, wherein the heat sink material is a phase change material.

9. A battery module comprising a plurality of battery cells (2) arranged in a matrix and a gap formed between the battery cells (2), wherein the heat absorbing strip according to any one of claims 1 to 8 is inserted into the gap, and the outer surface of the battery cell (2) is in abutting contact with the groove wall of the arc-shaped groove (102).