CN209804836U

CN209804836U - Battery module

Info

Publication number: CN209804836U
Application number: CN201920442996.XU
Authority: CN
Inventors: 陈磊; 刘科云; 王壹; 朱丽丽; 许玉林; 王爱淑
Original assignee: Suzhou Ankao Energy Co Ltd
Current assignee: Shanghai Qike Network Technology Co ltd
Priority date: 2019-04-03
Filing date: 2019-04-03
Publication date: 2019-12-17
Anticipated expiration: 2029-04-03

Abstract

the application discloses battery module, including a plurality of series connection each other or/and parallelly connected battery monomer inlay in the gap between the battery monomer and be equipped with and lean on the heat conduction strip of arranging with two at least battery monomers, the heat conduction strip has closed inner chamber, and the filling has phase transition liquid in the closed inner chamber, the fixed surface of heat conduction strip is equipped with the temperature probe who is used for detecting this heat conduction strip temperature. This kind of battery module simple structure is compact, low cost, convenient assembling of this application, and every free temperature homoenergetic of battery in the module can be gathered and obtain.

Description

Battery module

Technical Field

The present application relates to a battery module.

Background

the battery module mainly comprises a plurality of battery monomers which are connected in series and in parallel, and in order to monitor the temperature of each battery monomer in the battery module in real time and find danger in time when the temperature of a certain battery monomer is too high, the prior art generally arranges a temperature probe on the surface of each battery monomer. The lead wires of the temperature probes are connected to a temperature acquisition chip of the BMS device (battery management system), and the resistance value of the BMS device is converted into a temperature value.

however, to provide one temperature probe on each battery cell, not only is the cost high, but most battery modules do not have enough space for arranging the temperature probes, and the BMS device does not have enough space for arranging the lead-out wires of the temperature probes. It is therefore common practice to find several discrete points for temperature monitoring. The mode can not really detect the temperature runaway condition of each battery cell, and has great potential safety hazard.

Disclosure of Invention

The purpose of the application is: to the above problem, a battery module that simple structure is compact, low cost, convenient assembling just can detect every battery monomer temperature is proposed.

The technical scheme of the application is as follows:

The utility model provides a battery module, includes a plurality of series connection each other or/and parallelly connected battery monomer inlay in the gap between the battery monomer and be equipped with and lean on the heat conduction strip of arranging with two at least battery monomers, the heat conduction strip has closed inner chamber, and the filling has phase transition liquid in the closed inner chamber, the fixed surface of heat conduction strip is equipped with the temperature probe that is used for detecting this heat conduction strip temperature.

On the basis of the technical scheme, the application also comprises the following preferable scheme:

And heat conducting glue is arranged between the heat conducting strips and the battery monomer.

The heat conducting strip is made of aluminum.

the phase-change liquid is electronic fluorinated liquid.

The battery clamp is provided with a plurality of battery inserting holes distributed in a matrix shape, the end parts of the battery monomers are respectively inserted into the battery inserting holes, so that the battery monomers are arranged in parallel in the matrix shape, and the heat conducting strip is attached to all the battery monomers in two adjacent longitudinal rows.

The battery monomer is a cylindrical lithium ion battery.

The surface of the heat conducting strip is provided with at least two arc surface type grooves which are concave and matched with the outer peripheral surface of the battery monomer, and the outer peripheral surface of the battery monomer is attached to the groove wall surface of the arc surface type groove.

The heat conduction strip is equipped with at least two, every all be fixed with on the heat conduction strip temperature probe, every battery monomer all with correspond the heat conduction strip pastes to arrange.

The temperature probe is a water drop type temperature probe.

And the temperature probe is in circuit connection with the temperature acquisition chip.

The application has the advantages that:

1. This application inlays the dress in the gap of battery module and pastes the samming heat conduction strip that leans on to arrange with each battery monomer, utilizes the samming heat conductivility of heat conduction strip, makes each battery monomer temperature even and all equal with heat conduction strip temperature basically, only needs to set up one or a few temperature probe and comes each heat conduction strip temperature, alright indirect all battery monomer temperature values that reachs, simple structure is compact, convenient assembling, easy to carry out, low cost.

2. The temperature probe is fixed on the heat conduction strip instead of the single battery, so that the assembly is easier, and the structure of the single battery cannot be damaged.

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 an overall assembly diagram of a battery module in an embodiment of the present application;

Fig. 2 is an exploded view of a battery module in the embodiment of the present application;

Wherein: 1-single battery, 2-heat conducting strip, 3-temperature probe, 4-battery clamp, 201-battery plug-in hole and 401-arc surface groove.

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).

Fig. 1 and 2 show an embodiment of the battery module according to the present invention, which also includes a plurality of battery cells 1, in which the battery cells 1 are connected in parallel with each other or in series or in a series-parallel combination with each other, thereby forming a battery pack having a large capacity and a large voltage, as in the conventional battery module. The battery cells 1 are fixedly connected together by means of a battery clamp 4 (or called a battery holder) and the like: the outer contour of the battery holder 4 is a substantially rectangular flat plate structure, a plurality of battery insertion holes 401 are formed in the battery holder in a matrix shape and are parallel to each other, and the end portions (positive electrode end or negative electrode end) of the battery cells 1 are inserted into the battery insertion holes 401, so that the battery cells 1 are also distributed in a matrix shape and are parallel to each other. A metal conductor may be mounted on the battery holder 4 in conductive contact with the ends of the battery cells so as to electrically connect the battery cells to each other. The battery cell 1 is a cylindrical lithium ion battery, and two axial ends of the battery cell are respectively a positive end and a negative end.

The key improvement of this embodiment is that a heat conducting strip 2 is embedded in the gap between the battery cells 1, and the heat conducting strip 2 is arranged to abut against a plurality of battery cells 1 (even all battery cells 1) to absorb the heat of the battery cells 1. And a closed inner cavity is arranged in the heat conducting strip 2, and phase-change liquid is filled in the closed inner cavity. A temperature probe 3 for detecting the temperature of the heat conducting strip is fixed on the surface of the heat conducting strip 2.

In this embodiment, the temperature probe 3 is a water droplet type temperature probe, which is electrically connected to a temperature acquisition chip mounted in the BMS.

The battery cells 1 generate heat during charging and discharging, and the heat conducting strips 2 attached to and in contact with the battery cells absorb the heat of the battery cells. Because the phase-change liquid in the heat conducting strip 2 can flow in the closed inner cavity of the heat conducting strip, and can generate vaporization phase change after the temperature reaches a certain value to rapidly move to each position of the heat conducting strip 2, namely move from a high-temperature position to a low-temperature position, the heat conducting strip 2 has good temperature uniformity, so that the temperature uniformity of each battery monomer 1 is ensured, after a certain time, the temperatures of the heat conducting strip 2 and each battery monomer 1 reach balance and continuously keep the balance state, namely the temperature of the heat conducting strip 2 is basically equal to the temperature of each battery monomer 1. Therefore, the temperature of the heat conducting strip 2 detected by the temperature probe 3 is equal to the temperature of the plurality of battery cells 1 arranged adjacent to the heat conducting strip 2. Therefore, only one or a plurality of small heat conducting strips 2 are arranged in the battery module and one or a plurality of small temperature probes 3 are correspondingly arranged, so that the temperature of all battery monomers in the battery module can be detected in real time, and the battery module is very convenient.

A heat absorbing component such as a water cooling plate may be disposed in heat conductive connection with the heat conducting strip 2 to rapidly guide the heat absorbed by the heat conducting strip 2 out. In this case, when the temperatures of the heat conducting strip 2 and each battery cell 1 reach the equilibrium state, the heat of the heat conducting strip 2 is continuously absorbed by the water cooling plate, so the temperature of each battery cell 1 is slightly higher than that of the heat conducting strip, and the heat of each battery cell 1 is continuously and slowly transmitted to the heat conducting strip 2.

The heat conducting strips 2 are arranged to abut against all the battery cells 1 in two adjacent columns, so as to equalize the temperature of as many battery cells as possible.

In order to increase the heat transfer rate between the heat conducting strip 2 and the battery cell 1, a heat conducting glue is disposed between the heat conducting strip 2 and the battery cell 1.

The heat conducting strip 2 is made of an aluminum material with high heat conductivity coefficient.

Above-mentioned phase-change liquid adopts nontoxic environmental protection, insulating, nonflammable electron to fluoridize the liquid, even if heat conduction strip 2 takes place the damage because of the accident, the electron of revealing fluoridizes the liquid and can not lead to the battery short circuit to catch fire, and the security improves greatly.

In order to increase the heat transfer contact area between the heat conducting strip 2 and the battery cell 1, a plurality of concave arc-shaped grooves 201 are formed on the surface of the heat conducting strip 2, the shape of each arc-shaped groove 201 is matched with the outer peripheral surface of the battery cell 1, and the outer peripheral surface of the battery cell 1 is arranged in a manner of being attached to the groove wall surface of each arc-shaped groove 201.

If the number of battery monomers is more or the number of rows and columns of the battery matrix is more in the battery module, a plurality of heat conduction strips 2 can be arranged, and a temperature probe 3 is fixedly arranged on each heat conduction strip 2. And each battery unit 1 is arranged adjacent to the corresponding heat conducting strip 2, so that the temperature uniformity of all the battery units 1 is ensured.

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

1. The utility model provides a battery module, includes a plurality of battery monomer (1) of establishing ties each other or/and parallelly connected, its characterized in that inlay in the gap between battery monomer (1) be equipped with at least two battery monomer (1) pastes heat conduction strip (2) of leaning on the arrangement, heat conduction strip (2) have and seal the inner chamber, and the filling has phase-change liquid in the sealed inner chamber, the fixed surface of heat conduction strip (2) is equipped with temperature probe (3) that are used for detecting this heat conduction strip (2) temperature.

2. The battery module according to claim 1, wherein a thermally conductive adhesive is disposed between the thermally conductive strip (2) and the battery cell (1).

3. The battery module according to claim 1, wherein the heat conducting strip (2) is aluminum.

4. the battery module according to claim 1, wherein the phase-change liquid is an electronic fluorinated liquid.

5. The battery module according to claim 1, further comprising a battery clamp (4), wherein the battery clamp (4) is provided with a plurality of battery insertion holes (401) distributed in a matrix shape, the end of each single battery (1) is inserted into each battery insertion hole (401), the single batteries (1) are arranged in parallel in the matrix shape, and the heat conducting strip (2) is attached to all the single batteries (1) in two adjacent vertical columns.

6. The battery module according to claim 1, wherein the battery cells (1) are cylindrical lithium ion batteries.

7. The battery module according to claim 6, wherein the surface of the heat conducting strip (2) is formed with at least two concave arc-shaped grooves (201) matched with the outer peripheral surface of the battery cell (1), and the outer peripheral surface of the battery cell (1) is arranged in a manner of being abutted against the groove wall surface of the arc-shaped groove (201).

8. The battery module according to claim 1, wherein the number of the heat conducting strips (2) is at least two, the temperature probe (3) is fixed on each heat conducting strip (2), and each battery cell (1) is arranged in an abutting manner with the corresponding heat conducting strip (2).

9. The battery module according to claim 1, wherein the temperature probe (3) is a water droplet type temperature probe.

10. The battery module according to claim 1, wherein the temperature probe (3) is in circuit connection with a temperature acquisition chip.