WO2018094904A1 - 带吸热套的电池组和具有该电池组的动力电池 - Google Patents

带吸热套的电池组和具有该电池组的动力电池 Download PDF

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WO2018094904A1
WO2018094904A1 PCT/CN2017/075565 CN2017075565W WO2018094904A1 WO 2018094904 A1 WO2018094904 A1 WO 2018094904A1 CN 2017075565 W CN2017075565 W CN 2017075565W WO 2018094904 A1 WO2018094904 A1 WO 2018094904A1
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battery
battery pack
heat
absorbing sleeve
heat absorbing
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PCT/CN2017/075565
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English (en)
French (fr)
Inventor
许祎凡
孟祎凡
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苏州安靠电源有限公司
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Publication of WO2018094904A1 publication Critical patent/WO2018094904A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/643—Cylindrical cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a battery pack, and more particularly to a battery pack with a heat absorbing sleeve and a power battery having the same.
  • Lithium-ion batteries have been used more and more for their high specific energy, high specific power and long cycle life, especially in the application of vehicle power.
  • this type of battery stores a relatively high amount of energy, and it uses flammable organic matter as an electrolyte, thus posing many safety problems such as fire and explosion. How to improve safety and prevent fire has become the central task of lithium-ion battery workers.
  • manufacturers of single cells use various methods to improve the chemical stability of the positive active material and the electrolyte, and improve related systems such as separators.
  • the safety and reliability of the battery have been increasing.
  • the manufacturers of battery packs have been diligently improving the process and design.
  • the negative electrode welding-free welding technology proposed by the applicant is one of the successful methods, and in order to ensure safety, the technology is also equipped with a complicated electronic management system to control the working state of the battery. And to improve the heat dissipation capacity of the battery pack, so that the internal reaction heat is quickly dissipated, so as to reduce the operating temperature of the battery pack is a method that everyone is optimistic about.
  • the Chinese invention patent with the publication number CN102055003A proposes to cast a heat-dissipating mesh with a heat-conductive silicone, and a fin-shaped heat sink at the bottom of the shell is a good representative. Others use liquid nitrogen to cool down. Some also add a fan to the battery to cool down, which is another direction of efforts.
  • the object of the present invention is to provide a battery pack with a heat absorbing sleeve which is simple in structure, convenient in manufacture and assembly, and capable of efficiently dissipating heat from a single battery in each battery pack.
  • the technical solution of the present invention is: a battery pack with a heat absorbing sleeve, comprising a battery fixture and a plurality of single cells inserted in the battery fixture, and further comprising detachably slidably covering each of the single sheets And a heat absorbing sleeve which is in contact with the outer wall surface of each of the unit cells, and the heat absorbing sleeve is made of an insulating and heat conductive material.
  • the unit cell is a cylindrical battery, and the heat absorbing sleeve is provided with a plurality of circular through holes corresponding to the respective single cells, and the circular through holes are sleeved outside the single cells. And the wall surface of the hole is in close contact with the outer wall surface of the unit cell.
  • the thermal conductivity of the insulating and thermally conductive material is not less than 0.22 W/m ° C.
  • the heat absorbing sleeve is injection molded from the insulating and thermally conductive material, and the insulating and thermally conductive material comprises a thermoplastic substrate and a thermally conductive powder added to the thermoplastic substrate.
  • the thermoplastic substrate is rubber or plastic.
  • thermoplastic substrate is a flame retardant nylon, PP, PE or silicone rubber.
  • the thermal conductive powder is graphite fiber, carbon fiber, nickel powder, aluminum powder or iron powder.
  • the single cell is a lithium ion battery.
  • the present invention also provides a power battery including a battery case and a battery pack housed in the battery case, wherein the battery pack adopts the above structure, and the heat absorbing sleeve is disposed in close contact with the inner wall of the battery case.
  • each unit cell heats up due to discharge (or charging), and the heat is easily sucked away by the heat absorbing sleeve attached thereto. Since the heat absorbing sleeve is made of an insulating heat conductive material, the temperature inside the battery pack is easily balanced, thereby making the temperature of each of the single cells uniform, and each of the single cells does not have a large temperature difference.
  • the heat sink can be made separately, and then assembled to the battery pack during use. It is easy to install, simple to manufacture, and can be removed from the battery pack for easy replacement.
  • FIG. 1 is a schematic perspective view showing a three-dimensional structure of a battery pack according to an embodiment of the present invention
  • FIG. 2 is a front view of a battery pack in an embodiment of the present invention.
  • Figure 3 is a side view of the battery pack in the embodiment of the present invention.
  • Figure 4 is a cross-sectional view taken along line A-A of Figure 2;
  • the battery pack also includes a battery fixture 1 and a battery fixture inserted therein. a plurality of single cells 2, wherein the battery fixture is made of plastic material, and a plurality of single cell mounting holes are formed thereon,
  • the body battery 2 is a cylindrical lithium ion battery that is inserted into a single cell mounting hole of the battery holder 1.
  • the battery pack further includes a heat absorbing sleeve 3 that is detachably fitted over each of the unit cells 2 and in close contact with the outer wall surface of each of the unit cells.
  • the heat absorbing sleeve 3 is made of an insulating heat conductive material.
  • each of the unit cells 2 is heated by the discharge (or charging), and the heat is easily sucked away by the heat absorbing sleeve 2 attached thereto. Since the heat absorbing sleeve 2 is made of an insulating heat conductive material, the temperature inside the battery pack is easily balanced, thereby making the temperature of each of the unit cells 2 uniform, and each of the single cells does not have a large temperature difference.
  • an external heat dissipating mechanism (such as a heat exchanger, a heat dissipating fin, etc.) connected to the heat absorbing sleeve 2 may be directly disposed, and the heat absorbed by the heat absorbing sleeve 2 is dissipated by an external heat dissipating mechanism to reduce the roots of the battery pack. The temperature of the single cell.
  • the heat absorbing sleeve 2 can be closely attached to the metal battery box.
  • the inner wall arrangement and the high thermal conductivity heat absorbing sleeve 2 can quickly transfer the heat of each unit battery to the battery box wall, and are radiated to the external space through the battery box wall, thereby effectively reducing the internal temperature of the battery pack.
  • the heat absorbing sleeve 3 is specifically sleeved on each of the single cells 2 by the following structure: the heat absorbing sleeve 3 is provided with a plurality of corresponding to each of the single cells 2
  • the circular through hole is sleeved outside the unit cell, and the hole wall surface of the circular through hole is in close contact with the outer wall surface of the unit cell.
  • the heat absorbing sleeve 3 is specifically injection molded from an insulating heat conductive material.
  • the insulating heat conductive material for forming the heat absorbing sleeve 3 preferably has a thermal conductivity of not less than 0.22 W/m ° C.
  • the insulating and thermally conductive material may be various formulations well known to those skilled in the art of heat conductive materials.
  • the insulating and thermally conductive material comprises a thermoplastic substrate and a heat conductive powder added to the thermoplastic substrate. material.
  • the thermoplastic substrate is made of rubber, and plastic, preferably flame retardant nylon, PP, PE or silicone rubber material.
  • the thermally conductive powder is preferably graphite fiber, carbon fiber, nickel powder, aluminum powder or iron powder.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)
  • Secondary Cells (AREA)

Abstract

本发明公开了一种带吸热套（3）的电池组和具有该电池组的动力电池，其中电池组包括电池夹具（1）以及插设在所述电池夹具（1）中的若干根单体电池（2），还包括可拆卸地穿套在每一根所述单体电池（2）外、且与每一根所述单体电池（2）的外壁面均贴紧接触的吸热套（3），所述吸热套（3）由绝缘导热材料制成。

Description

带吸热套的电池组和具有该电池组的动力电池 技术领域
本发明涉及一种电池组，尤其是一种带吸热套的带吸热套的电池组和具有该电池组的动力电池。
背景技术
锂离子电池以其高比能量，高比功率和长循环寿命，得到了越来越多的应用，尤其在车辆动力方面的应用更是突出。
但是此种电池储存的能量相对高很多，而且，它又使用可燃性的有机物做电解液，因此，带来了可着火爆炸等诸多安全问题。如何提高安全性，防失火已变成锂离子电池工作者的中心工作。首先，单体电池的制造者们使用各种方法改进正极活性物质和电解液的化学稳定性，又改进隔膜等相关系统，电池的安全性，可靠性一直在提高。而电池组的制造者们又挖空心思地改进工艺及设计。申请人提出的负极免焊接工艺技术就是其中一个成功的方法，而且该技术为了保障安全，又加装复杂的电子管理系统，控制电池的工作状态不越矩。而给电池组提高散热能力，使内部反应热迅速散出，以降低电池组的工作温度更是一个大家都看好的方法。
例如公开号为CN102055003A的中国发明专利提出用导热硅胶浇铸成散热网，并在壳底加鳍状散热片就是一个很好的代表。还有的采用液氮降温。也有的给电池加装风扇降温，这又是一个努力的方向。
虽然现有技术中对电池组散热的方法已有很多，但往往每一种方法都有一定的局限性。比如CN102055003A中，浇铸的散热网不可拆卸，用液氮结构又太复杂。风扇不仅复杂而且其寿命也不乐观。
发明内容
本发明目的是：为了克服上述问题，提供一种带吸热套的电池组，其结构简单，制作和装配方便，而且能够对各根电池组中的单体电池进行高效散热。
本发明的技术方案是：一种带吸热套的电池组，包括电池夹具以及插设在所述电池夹具中的若干根单体电池，还包括可拆卸地穿套在每一根所述单体电池外、且与每一根所述单体电池的外壁面均贴紧接触的吸热套，所述吸热套由绝缘导热材料制成。
本发明在上述技术方案的基础上，还包括以下优选方案：
所述单体电池为圆柱形电池，所述吸热套上开设有若干个与各根所述单体电池分别对应的圆形通孔，所述圆形通孔套在所述单体电池外，且其孔壁面与所述单体电池的外壁面贴紧接触。
所述绝缘导热材料的导热系数不小于0.22W/m℃。
所述吸热套由所述绝缘导热材料注塑而成，所述绝缘导热材料包括热塑性基材和添加在所述热塑性基材中的导热粉料。
所述热塑性基材为橡胶或塑料。
所述热塑性基材为阻燃尼龙，PP，PE或硅橡胶。
所述导热粉料为石墨纤维，碳纤维，镍粉，铝粉或铁粉。
所述单体电池为锂离子电池。
本发明还提供了一种动力电池，其包括电池箱和收容在该电池箱内的电池组，其中电池组采用上述结构，而且吸热套紧贴所述电池箱的内壁布置。
本发明的优点是：
1、本发明这种电池组在工作时，各单体电池因放电(或充电)而发热升温，热量很容易被贴紧它的吸热套吸走。由于吸热套由绝缘导热材料，所以电池组内部的温度容易均衡，由此使得各根单体电池的温度变均匀，各根单体电池不会存在太大的温差。
2、而且，还可以直接设置与吸热套相连的外部散热机构(如换热器、散热鳍片等)，通过外部散热机构将吸热套吸收的电池热量散布出去，降低电池组中各根单体电池的温度。
3、散热套可单独制作，使用时再装配至电池组上，其安装方便，制作简单，能能够从电池组上拆卸下来，方便更换。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明实施例中电池组的立体结构示意图；
图2为本发明实施例中电池组的主视图；
图3为本发明实施例中电池组的侧视图；
图4为图2的A-A向剖面图；
其中：1-电池夹具，2-单体电池，3-吸热套。
具体实施方式
以下结合具体实施例对上述方案做进一步说明。应理解，这些实施例是用于说明本发明而不限于限制本发明的范围。实施例中采用的实施条件可以根据具体厂家的条件做进一步调整，未注明的实施条件通常为常规实验中的条件。
图1至图4示出了本发明这种带吸热套电池组的一个具体实施例，与传统电池组相同的是，该电池组也包括电池夹具1以及插设在所述电池夹具中的若干根单体电池2，其中电池夹具为塑料材质，其上制有许多单体电池安装孔，单 体电池2为圆柱形的锂离子电池，其插设在电池夹具1的单体电池安装孔中。
本实施例的关键改进在于，该电池组还包括可拆卸地穿套在每一根单体电池2外、且与每一根单体电池的外壁面均贴紧接触的吸热套3，该吸热套3由绝缘导热材料制成。
该电池组在工作时，各单体电池2因放电(或充电)而发热升温，热量很容易被贴紧它的吸热套2吸走。由于吸热套2由绝缘导热材料，所以电池组内部的温度容易均衡，由此使得各根单体电池2的温度变均匀，各根单体电池不会存在太大的温差。而且，也可以直接设置与吸热套2相连的外部散热机构(如换热器、散热鳍片等)，通过外部散热机构将吸热套2吸收的电池热量散布出去，降低电池组中各根单体电池的温度。
当采用本实施例这种电池组制作汽车的动力电池时(众所周知，动力电池一般包括电池箱和收容在电池箱内的电池组)，可将所述吸热套2紧贴金属材质的电池箱的内壁布置，高导热性的吸热套2能够迅速将各单体电池的热量传递到电池箱箱壁，通过电池箱箱壁散发到外部空间，有效降低电池组内部温度。
在本实施例中，所述吸热套3具体是通过下述结构形式套设在各根单体电池2上的：吸热套3上开设有多个与各根单体电池2分别对应的圆形通孔，所述圆形通孔套在单体电池外，且圆形通孔的孔壁面与单体电池的外壁面贴紧接触。
在本实施例中，所述吸热套3具体是由绝缘导热材料注塑而成的。而且用于制作所述吸热套3的绝缘导热材料，其导热系数最好不小于0.22W/m℃。
上述绝缘导热材料的具体成分可以采用导热材料领域普通技术人员所熟知的各种配方，具体在本实施例中，所述绝缘导热材料包括热塑性基材和添加在所述热塑性基材中的导热粉料。其中，所述热塑性基材采用橡胶，也可以采用塑料，优选阻燃尼龙、PP、PE或硅橡胶材料。所述导热粉料优选石墨纤维，碳纤维，镍粉，铝粉或铁粉。
上述实施例只为说明本发明的技术构思及特点，其目的在于让人们能够了解本发明的内容并据以实施，并不能以此限制本发明的保护范围。凡根据本发明主要技术方案的精神实质所做的等效变换或修饰，都应涵盖在本发明的保护范围之内。

Claims (9)

  1. 一种带吸热套的电池组，包括电池夹具(1)以及插设在所述电池夹具中的若干根单体电池(2)，其特征在于，还包括可拆卸地穿套在每一根所述单体电池(2)外、且与每一根所述单体电池的外壁面均贴紧接触的吸热套(3)，所述吸热套(3)由绝缘导热材料制成。
  2. 如权利要求1所述的带吸热套的电池组，其特征在于，所述单体电池(2)为圆柱形电池，所述吸热套(3)上开设有若干个与各根所述单体电池(2)分别对应的圆形通孔，所述圆形通孔套在所述单体电池外，且其孔壁面与所述单体电池的外壁面贴紧接触。
  3. 如权利要求1所述的带吸热套的电池组，其特征在于，所述绝缘导热材料的导热系数不小于0.22W/m℃。
  4. 如权利要求3所述的带吸热套的电池组，其特征在于，所述吸热套(3)由所述绝缘导热材料注塑而成，所述绝缘导热材料包括热塑性基材和添加在所述热塑性基材中的导热粉料。
  5. 如权利要求4所述的带吸热套的电池组，其特征在于，所述热塑性基材为橡胶或塑料。
  6. 如权利要求5所述的带吸热套的电池组，其特征在于，所述热塑性基材为阻燃尼龙，PP，PE或硅橡胶。
  7. 如权利要求4所述的带吸热套的电池组，其特征在于，所述导热粉料为石墨纤维，碳纤维，镍粉，铝粉或铁粉。
  8. 如权利要求1中任一所述的带吸热套的电池组，其特征在于，所述单体电池(2)为锂离子电池。
  9. 一种动力电池，包括电池箱和收容在该电池箱内的电池组，其特征在于，所述电池组采用如权利要求1～8中任一所述的结构，所述吸热套(3)紧贴所述电池箱的内壁布置。
PCT/CN2017/075565 2016-11-24 2017-03-03 带吸热套的电池组和具有该电池组的动力电池 WO2018094904A1 (zh)

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