WO2025021100A1 - 冷却系统及电池包 - Google Patents

冷却系统及电池包 Download PDF

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Publication number
WO2025021100A1
WO2025021100A1 PCT/CN2024/107166 CN2024107166W WO2025021100A1 WO 2025021100 A1 WO2025021100 A1 WO 2025021100A1 CN 2024107166 W CN2024107166 W CN 2024107166W WO 2025021100 A1 WO2025021100 A1 WO 2025021100A1
Authority
WO
WIPO (PCT)
Prior art keywords
plate
cold plate
cooling system
pressure relief
cold
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/107166
Other languages
English (en)
French (fr)
Inventor
赵宇航
秦波
闫仕伟
王圆圆
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eve Energy Co Ltd
Original Assignee
Eve Energy Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eve Energy Co Ltd filed Critical Eve Energy Co Ltd
Priority to KR1020257031051A priority Critical patent/KR20250153229A/ko
Publication of WO2025021100A1 publication Critical patent/WO2025021100A1/zh
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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Classifications

    • 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
    • H01M10/6551—Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
    • 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
    • H01M10/62—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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/317—Re-sealable arrangements
    • 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 application relates to the technical field of battery heat dissipation, and in particular to a cooling system and a battery pack.
  • the problem of high heat generation in cylindrical battery packs is usually solved by the serpentine tube side liquid cooling solution, that is, the serpentine tube is in contact with the side of the battery cell, and the coolant flows in the serpentine tube cavity to form convection heat exchange with the battery cell. Due to the limited heat exchange area in the cavity, this solution can solve the problem of low charging rate, but it is difficult to control the temperature in an ideal state under high charging rate conditions, which affects the life of the battery cell and causes safety risks in driving.
  • an embodiment of the present application provides a cooling system, wherein the cooling system is used to dissipate heat for a battery cell group, wherein the battery cell group includes a plurality of arranged battery cells, and the cooling system includes: at least one cooling assembly, wherein the cooling assembly includes a first cold plate and a second cold plate connected to the first cold plate; a pressure relief assembly, abutting against one end of the battery cell where a pressure relief valve is provided, the pressure relief assembly is provided with a liquid cooling channel and a pressure relief channel spaced apart, and the pressure relief channel is connected to the pressure relief valve of the battery cell; wherein the first cold plate is arranged on the side of the corresponding battery cell, the second cold plate is arranged on the end of the corresponding battery cell where the pressure relief valve is not provided, and the cooling assembly is connected in parallel with the liquid cooling channel.
  • the battery pack provided in the present application is designed based on the above-mentioned cooling system. Its beneficial effects can be found in the beneficial effects of the above-mentioned cooling system, which will not be elaborated here one by one.
  • FIG1 is an exploded schematic diagram of a cooling system according to an embodiment of the present application.
  • FIG2 is a schematic diagram showing a first three-dimensional structure of a cooling system according to an embodiment of the present application
  • FIG3 is a schematic diagram showing a second three-dimensional structure of a cooling system according to an embodiment of the present application.
  • FIG4 is a schematic diagram showing the top of the first stamping plate of an embodiment of the present application.
  • FIG. 5 is a schematic diagram showing the bottom of the first stamping plate according to an embodiment of the present application.
  • first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as “first” and “second” may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of “multiple” is two or more, unless otherwise clearly and specifically defined.
  • the terms “installed”, “connected”, and “connected” should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements.
  • installed should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements.
  • Fig. 1 is an exploded schematic diagram of a cooling system according to an embodiment of the present application. As shown in Fig. 1 , the cooling system can be used to dissipate heat for a battery cell group, wherein the battery cell group includes a plurality of battery cells 1 arranged in rows.
  • the battery cells 1 in two adjacent rows can be arranged in a staggered manner.
  • the plurality of battery cells 1 can be arranged along the x direction, and the battery cells 1 in alternate rows can be arranged along the y direction.
  • the plurality of battery cells 1 have odd rows and even rows, and the arrangement of the battery cells 1 in the plurality of odd rows is consistent, and the arrangement of the battery cells 1 in the plurality of even rows is consistent, so that different battery cells 1 located in odd rows can be arranged on the same straight line along the y direction, and different battery cells 1 located in even rows can also be arranged on the same straight line along the y direction, so that the arrangement of the plurality of battery cells 1 can be more compact, thereby improving the energy density of the battery pack and saving space.
  • the cooling system may include at least one cooling assembly 2.
  • the multiple cooling assemblies 2 are arranged in parallel with each other. It should be noted that in FIG1 , in order to more clearly show the specific structure of the cooling assembly 2, a part of the cooling assembly 2 located at the edge is moved up and shown separately.
  • the cooling assembly 2 includes a first cold plate 21 and a second cold plate 22 connected to the first cold plate 21.
  • the number of the first cold plate 21 may be one or more
  • the number of the second cold plate 22 may be one or more. It can be understood that the number of the first cold plate 21 and the second cold plate 22 in the cooling assembly 2 can be set as needed.
  • the first cold plate 21 is disposed on the side of the corresponding row of the battery cells 1.
  • the first cold plate 21 can extend along the row direction of the battery cells 1 (i.e., the x direction in FIG. 1 ) and expand along the height direction of the battery cells 1 (i.e., the z direction in FIG. 1 ).
  • the second cold plate 22 is disposed on the top of the corresponding row of the battery cells 1.
  • the second cold plate 22 may extend along the row direction of the battery cells 1 and extend along the thickness direction of the first cold plate 21 (ie, the y direction in FIG. 1 ).
  • the extension direction of the first cold plate 21 may be parallel to the extension direction of the second cold plate 22, and the expansion direction of the first cold plate 21 may be perpendicular to the expansion direction of the second cold plate 22.
  • the first cold plate 21 and the second cold plate 22 form a T-shaped structure.
  • the first cold plate 21 includes a first cold plate body 210, and the first cold plate body 210 is installed between two adjacent rows of the battery cells 1 along the height direction of the battery cells 1, and contacts the two adjacent rows of the battery cells 1.
  • the first cold plate body 210 may also be disposed on one side of a row of the battery cells 1, for example, the first cold plate body 210 may be disposed on one side of a row of the battery cells 1 at an edge position, and in this case, the first cold plate body 210 contacts the battery cells 1 at the edge row on one side instead of on both sides.
  • the second cold plate 22 includes a second cold plate body 220, which is laid flat on the top surface of two adjacent rows of the battery cells 1.
  • a protruding pole 10 is provided on the top surface of each battery cell 1.
  • the second cold plate body 220 has two opposite first plate edges 2201 and a second plate edge 2202, and the first plate edge 2201 and the second plate edge 2202 are respectively in contact with the poles 10 of the two adjacent rows of the battery cells 1.
  • FIG2 shows a schematic diagram of the first three-dimensional structure of the cooling system of an embodiment of the present application.
  • the first plate edge 2201 may include a plurality of arc segments, and the arc segments may be convex segments or concave segments.
  • the convex segments and the concave segments are arranged alternately.
  • the concave segments are engaged with the corresponding poles 10, and the convex segments extend between two adjacent poles 10.
  • the engagement between the first cold plate and the poles can be used to improve the structural strength inside the battery pack, and the contact area between the first cold plate and the top surface of the battery cell can be expanded, thereby improving the heat exchange effect at the top of the battery cell.
  • the first cold plate 21 further includes a first side plate 211 and a second side plate 212 respectively disposed at both ends of the first cold plate body 210.
  • the shape of the first side plate 211 may be the same as that of the second side plate 212, for example, the first side plate 211 and the second side plate 212 may both be rectangular blocks.
  • the first side plate 211 is connected to one end of the first cold plate body 210 and may be integrally formed with the first cold plate body 210; the second side plate 212 is connected to the other end of the first cold plate body 210 and may also be integrally formed with the first cold plate body 210.
  • the second cold plate 22 further includes a first top plate 221 and a second top plate 222 respectively disposed at both ends of the second cold plate body 220.
  • the shape of the first top plate 221 may be the same as that of the second top plate 222, for example, the first top plate 221 and the second top plate 222 may both be rectangular blocks.
  • the first top plate 221 is connected to one end of the second cold plate body 220 and may be integrally formed with the second cold plate body 220; the second top plate 222 is connected to the other end of the second cold plate body 220 and may also be integrally formed with the second cold plate body 220.
  • first side plate 211 and the second side plate 212 are both extended along the height direction of the plurality of battery cells 1, and the first top plate 221 and the second top plate 222 are both extended along the thickness direction of the first cold plate 21.
  • the first top plate 221 is disposed on the first side plate 211 to form a T-shaped structure; the second top plate 222 is disposed on the second side plate 212 to form another T-shaped structure.
  • the first side plate 211 is provided with a first mounting hole 2110 penetrating the first side plate 211, so that the first cooling pipe 23 passes through the first mounting hole 2110.
  • the first cooling pipe 23 is a liquid inlet pipe, which is used to distribute the inflowing coolant to each of the cooling components 2.
  • FIG3 shows a second schematic diagram of the three-dimensional structure of the cooling system of an embodiment of the present application.
  • the second side plate 212 is provided with a second mounting hole 2120 that penetrates the second side plate 212, so that the second cooling pipe 24 passes through the second mounting hole 2120.
  • the second cooling pipe 24 is a liquid outlet pipe for collecting the coolant of each cooling component 2.
  • the first cooling pipe 23, the second cooling pipe 24 and each cooling component 2 together form a circulation of the cooling medium to take away the heat of the battery cell 1.
  • the cooling medium may be a coolant.
  • the cooling medium may also be in other forms, and the present application does not limit the specific form of the cooling medium.
  • the cooling system may further include a pressure relief component 5, and the plurality of battery cells 1 are disposed on the pressure relief component 5.
  • the pressure relief component 5 has a top and a bottom, and the top of the pressure relief component 5 is disposed toward the plurality of battery cells 1.
  • the pressure relief component 5 is disposed on the side of the bottom of the plurality of battery cells 1, and the pressure relief component 5 is deployed along the thickness direction of the first cold plate 21.
  • the pressure relief assembly 5 abuts against one end of the battery cell 1 provided with a pressure relief valve, and the pressure relief assembly 5 is provided with a spaced liquid cooling channel and a pressure relief channel, and the pressure relief channel is communicated with the pressure relief valve of the battery cell 1.
  • the pressure relief assembly 5 includes a first stamping plate 3 and a second stamping plate 4.
  • FIG4 shows a schematic diagram of the top of the first stamping plate of an embodiment of the present application.
  • a plurality of first protrusions 31 and a first recess 32 may be provided on the top of the first stamping plate 3.
  • the plurality of first protrusions 31 may be arranged at intervals along the row direction in which the plurality of battery cells 1 are arranged, and the plurality of first protrusions 31 may be parallel to each other.
  • the first recess 32 may be located between two adjacent first protrusions 31.
  • One of the first recess 32 and the first protrusion 31 is a liquid cooling channel, and the other is a pressure relief channel.
  • the pressure relief component 5 has a uniform wall thickness and a concave-convex shape.
  • the first stamping plate 3 has a uniform wall thickness and a concave-convex shape.
  • FIG5 is a schematic diagram of the bottom of the first stamping plate of the embodiment of the present application.
  • a plurality of second recesses 33 and a second convex portion 34 may be provided on the bottom of the first stamping plate 3.
  • the plurality of second recesses 33 may be arranged at intervals along the row direction of the plurality of battery cells 1, and the plurality of second recesses 33 may be parallel to each other.
  • the second convex portion 34 may be located between two adjacent second recesses 33.
  • the second recessed portion 33 may include a plurality of second sub-portions 320, and the plurality of second sub-portions 320 are connected to each other.
  • the two opposite sides of the second sub-portion 320 may be arc segments with opposite bending directions, such as arc segment 3201 and arc segment 3202.
  • the second sub-portion 320 may be provided with an avoidance hole 30 penetrating the second sub-portion 320, and the avoidance hole 30 is provided adjacent to the arc segment on one side of the second sub-portion 320.
  • the pressure relief assembly 5 may further include a second stamping plate 4 .
  • the second stamping plate 4 may be disposed on the first stamping plate 3 and located between the first stamping plate 3 and the bottom of the plurality of battery cells 1 .
  • the first recess 32 and the second stamping plate 4 are spaced apart to form the liquid cooling channel, the first protrusion abuts against the second stamping plate 4 , and the first protrusion 31 faces away from the second stamping plate 4 to form the pressure relief channel.
  • the first protrusion 31 and the second stamping plate 4 are both provided with interconnected avoidance holes, and the avoidance holes are opposite to the pressure relief valve of the battery cell.
  • the second stamping plate 4 may be provided with a plurality of avoidance holes 40, and the avoidance holes 40, the avoidance holes 30 and the battery cell 1 are provided correspondingly.
  • the second stamping plate 4 may be a planar structure, and the second stamping plate 4 covers the top of the first stamping plate 3.
  • the first convex portion 31 and the second concave portion 33 are both wavy.
  • the advantage of the pressure relief at the bottom of the cylindrical battery cell can be retained.
  • the flame will not spray toward the passengers in the cabin, thereby improving safety.
  • Setting the flow channel of the stamping plate in a wavy shape can further enhance the cooling performance of the battery cell, and the design of the wavy flow channel is easier to form flow channel turbulence, thereby enhancing the heat exchange performance of the cold plate.
  • the second cold plate 22 is disposed at the end of the corresponding battery cell 1 where the pressure relief valve is not disposed, and the cooling assembly 2 is connected in parallel with the liquid cooling channel.
  • the first stamping plate 3 is disposed in parallel with the cooling assembly 2
  • the second stamping plate 4 is disposed in parallel with the cooling assembly 2.
  • the present application also provides a battery pack, which includes the cooling system and a battery cell group.
  • the embodiment of the present application arranges a first cold plate and a second cold plate connected to the first cold plate in the cooling assembly, and arranges the first cold plate on the side of the battery cells in the corresponding row, and the second cold plate on the top of the battery cells in the corresponding row, and arranges the cooling assembly in parallel with the liquid cooling channel, which can increase the contact area of the battery cells for heat exchange, thereby improving the heat exchange efficiency of the battery cells, and improving the heat exchange effect of the battery cells, thereby solving the high temperature problem caused by super-fast charging of large cylindrical batteries, and at the same time further reducing the pressure drop of the cooling system, and further improving the temperature equalization effect.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Secondary Cells (AREA)

Abstract

一种冷却系统及电池包，电芯组包括排布的多个电芯（1），冷却系统包括：冷却组件（2），包括第一冷板（21）和第二冷板（22）；泄压组件（5），设有间隔的液冷通道和泄压通道，泄压通道与电芯（1）的泄压阀连通；其中，第一冷板（21）设置于对应的电芯（1）的侧部，第二冷板（22）设置于对应的电芯（1）未设置泄压阀的一端，冷却组件（2）与液冷通道并联连通。

Description

冷却系统及电池包
本申请要求在2023年7月24日提交中国专利局、申请号为202321955381.X的中国专利申请的优先权，以上申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及电池散热技术领域，尤其涉及一种冷却系统及电池包。
 背景技术
随着新能源汽车的高速发展，纯电动汽车用户对汽车续航里程和充电倍率的要求越来越高，电芯的能量也越来越大，这就导致电芯工作时的发热量越来越高。同时，随着电芯数量和充电倍率的提升，温度一致性更加难以控制，需要通过更高效的液冷方案对电芯进行冷却和均温。
 发明概述
相关技术中，针对圆柱电池包存在着发热量较大的难题，通常采用蛇形管侧面液冷的方案，即采用蛇形管与电芯侧面接触，冷却液在蛇形管型腔内流动，以与电芯形成对流换热。由于型腔内换热面积有限，这种方案可以解决较低倍率的充电速率，但在高倍率充电工况下温度难以控制在理想状态，从而影响电芯寿命，导致行车存在安全风险。
第一方面，本申请的实施例提供了一种冷却系统，所述冷却系统用于为电芯组散热，所述电芯组包括排布的多个电芯，所述冷却系统包括：至少一冷却组件，所述冷却组件包括第一冷板和连接于所述第一冷板的第二冷板；泄压组件，抵接于所述电芯设有泄压阀的一端，所述泄压组件设有间隔的液冷通道和泄压通道，所述泄压通道与所述电芯的泄压阀连通；其中，所述第一冷板设置于对应的所述电芯的侧部，所述第二冷板设置于对应的所述电芯未设置所述泄压阀的一端，所述冷却组件与所述液冷通道并联连通。
第二方面，本申请的实施例提供了一种电池包，所述电池包包括所述冷却系统以及电芯组。
有益效果
本申请提供的冷却系统，通过在冷却组件中设置第一冷板和连接于第一冷板的第二冷板，并将第一冷板设置于对应行的电芯的侧部，第二冷板设置于对应行的电芯的顶部，且设置冷却组件与液冷通道并联，从而能够增大电芯换热的接触面积，进而提高电芯的换热效率，提升电芯的换热效果，从而解决大圆柱电池超级快充带来的高温问题，同时进一步降低冷却系统的压降，进一步提升均温效果。
本申请提供的电池包基于上述冷却系统而设计，其有益效果参见上述冷却系统的有益效果，在此不一一赘述。
 附图说明
图1示出本申请实施例的冷却系统的爆炸示意图；
图2示出本申请实施例的冷却系统的第一种立体结构示意图；
图3示出本申请实施例的冷却系统的第二种立体结构示意图；
图4示出本申请实施例的第一冲压板顶部的示意图；
图5示出本申请实施例的第一冲压板底部的示意图。
 本发明的实施方式
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。在本申请的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
在本申请的描述中，需要说明的是，除非另有明确的固件和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接或可以相互通讯；可以是直接连接，也可以通过中间媒介间接连接，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
下文的公开提供了许多不同的实施方式或例子用来实现本申请的不同结构。为了简化本申请的公开，下文中对特定例子的部件和设置进行描述。当然，它们仅为示例，并且目的不在于限制本申请。此外，本申请可以在不同例子中重复参考数字和/或参考字母，这种重复是为了简化和清楚的目的，其本身不指示所讨论各种实施方式和/或设置之间的关系。此外，本申请提供了的各种特定的工艺和材料的例子，但是本领域普通技术人员可以意识到其他工艺的应用和/或其他材料的使用。在一些实例中，对于本领域技术人员熟知的方法、手段、元件和电路未作详细描述，以便于凸显本申请的主旨。
图1示出本申请实施例的冷却系统的爆炸示意图。如图1所示，所述冷却系统可用于为电芯组进行散热，所述电芯组包括按行排布的多个电芯1。
其中，相邻两行所述电芯1可交错排列。例如，在图1中，多个所述电芯1可沿x方向进行排布，隔行的所述电芯1可沿y方向进行排布。具体的，多个所述电芯1具有奇数行和偶数行，多个奇数行的电芯1的排布相一致，多个偶数行的电芯1的排布相一致，使得位于奇数行的不同电芯1可以沿着y方向设置在同一直线上，位于偶数行的不同电芯1也可以沿着y方向设置在同一直线上，如此多个电芯1的排布能够更加紧密，提升电池包的能量密度，节省空间。
参考图1，所述冷却系统可包括至少一冷却组件2。当所述冷却组件2的数量为多个时，多个所述冷却组件2之间相互平行设置。需要说明的是，在图1中为了更清楚的展示冷却组件2的具体结构，将位于边缘的冷却组件2的一部分上移并单独展示。
在一实施例中，所述冷却组件2包括第一冷板21和连接于所述第一冷板21的第二冷板22。每个所述冷却组件2中，所述第一冷板21的数量也可以有一个或多个，所述第二冷板22的数量也可以有一个或多个。可以理解，所述冷却组件2中的第一冷板21和第二冷板22的数量可以根据需要进行设置。
其中，所述第一冷板21设置于对应行的所述电芯1的侧部。所述第一冷板21可沿多个所述电芯1排布的行方向（即图1中的x方向）延伸，且沿多个所述电芯1的高度方向（即图1中的z方向）展开。
所述第二冷板22设置于对应行的所述电芯1的顶部。所述第二冷板22可沿多个所述电芯1排布的行方向延伸，且沿所述第一冷板21的厚度方向（即图1中的y方向）展开。
可选的，所述第一冷板21的延伸方向可与所述第二冷板22的延伸方向相平行，所述第一冷板21的展开方向可与所述第二冷板22的展开方向相垂直。所述第一冷板21和所述第二冷板22组成T型结构。
通过利用第二冷板包覆电芯的顶部，利用第一冷板包覆电芯的侧面，申请实施例能够增大电芯换热的接触面积，进而提高电芯的换热效率以及温度的均一性，提升电芯的换热效果，从而解决大圆柱电池超级快充带来的高温问题。
在一实施例中，所述第一冷板21包括第一冷板本体210，所述第一冷板本体210沿所述电芯1的高度方向安装于相邻两行所述电芯1之间，并与该相邻两行所述电芯1相接触。在一些实施例中，所述第一冷板本体210也可设置于一行所述电芯1的一侧，例如位于边缘位置的一行所述电芯1的一侧可设置有所述第一冷板本体210，此时所述第一冷板本体210单面而非双面与边缘行的所述电芯1相接触。
在一实施例中，所述第二冷板22包括第二冷板本体220，所述第二冷板本体220平铺于相邻两行所述电芯1的顶部表面上。每个所述电芯1的顶部表面上设有凸起的极柱10。所述第二冷板本体220具有两相对的第一板边2201和第二板边2202，所述第一板边2201和第二板边2202分别与相邻两行所述电芯1的极柱10相接触。
示例性的，第一板边2201可卡接于所述相邻两行电芯1的其中一行所述电芯1的极柱10，第二板边2202可卡接于所述相邻两行电芯1的另一行所述电芯1的极柱10。所述第一板边2201和所述第二板边2202中的至少一者为蛇形（或波浪形）。也就是说，所述第一板边2201和所述第二板边2202可以均为蛇形，也可以设置所述第一板边2201为蛇形，所述第二板边2202为直线或其他形状。
图2示出本申请实施例的冷却系统的第一种立体结构示意图。参见图2，以所述第一板边2201为蛇形为例，所述第一板边2201可包括多个弧段，所述弧段可以是凸段，也可以是凹段。所述凸段和所述凹段交错设置。示例性的，所述凹段与对应的所述极柱10卡合，所述凸段伸入至相邻两所述极柱10之间，如此既能够利用第一冷板与极柱的卡合提升电池包内部的结构强度，又能扩大第一冷板与电芯顶部表面的接触面积，从而提升电芯顶部的换热效果。
在一实施例中，所述第一冷板21还包括分设于所述第一冷板本体210两端的第一侧板211和第二侧板212。所述第一侧板211的形状可与所述第二侧板212的形状相同，例如所述第一侧板211和所述第二侧板212均可为矩形块。所述第一侧板211连接于所述第一冷板本体210的一端，并可与所述第一冷板本体210一体成型；所述第二侧板212连接于所述第一冷板本体210的另一端，也可与所述第一冷板本体210一体成型。
在一实施例中，所述第二冷板22还包括分设于所述第二冷板本体220两端的第一顶板221和第二顶板222。所述第一顶板221的形状可与所述第二顶板222的形状相同，例如所述第一顶板221和所述第二顶板222均可为矩形块。所述第一顶板221连接于所述第二冷板本体220的一端，并可与所述第二冷板本体220一体成型；所述第二顶板222连接于所述第二冷板本体220的另一端，也可与所述第二冷板本体220一体成型。
在一实施例中，所述第一侧板211和第二侧板212均沿多个所述电芯1的高度方向展开，所述第一顶板221和第二顶板222均沿所述第一冷板21的厚度方向展开。所述第一顶板221设置于所述第一侧板211上，组成一T型结构；所述第二顶板222设置于所述第二侧板212上，组成另一T型结构。
在一实施例中，所述第一侧板211上设有贯穿所述第一侧板211的第一安装孔2110，以使第一冷却管道23从该第一安装孔2110穿过。示例性的，所述第一冷却管道23为进液管道，用于将流入的冷却液分配至各所述冷却组件2。
图3示出本申请实施例的冷却系统的第二种立体结构示意图。如图3所示，所述第二侧板212上设有贯穿所述第二侧板212的第二安装孔2120，以使第二冷却管道24从该第二安装孔2120穿过。示例性的，所述第二冷却管道24为出液管道，用于将各所述冷却组件2的冷却液进行汇集。所述第一冷却管道23、所述第二冷却管道24以及各所述冷却组件2共同形成冷却介质的循环，以将所述电芯1的热量带走。在本申请中，所述冷却介质可以为冷却液。所述冷却介质也可以为其他形式，本申请对于冷却介质的具体形态并不限定。
进一步地，请参阅图1至图3，所述冷却系统还可包括泄压组件5，多个所述电芯1设置于所述泄压组件5上。所述泄压组件5具有顶部和底部，所述泄压组件5的顶部朝向多个所述电芯1设置。所述泄压组件5设置于多个所述电芯1的底部的侧部，所述泄压组件5沿所述第一冷板21的厚度方向展开。
在一实施例中，所述泄压组件5抵接于所述电芯1设有泄压阀的一端，所述泄压组件5设有间隔的液冷通道和泄压通道，所述泄压通道与所述电芯1的泄压阀连通。其中，所述泄压组件5包括第一冲压板3和第二冲压板4。
图4示出本申请实施例的第一冲压板顶部的示意图。如图4所示，从图1自上而下看第一冲压板3的顶部，所述第一冲压板3的顶部上可设置有多个第一凸部31以及一第一凹部32。其中，多个所述第一凸部31可沿多个所述电芯1排布的行方向间隔设置，且多个所述第一凸部31之间可相互平行。所述第一凹部32可位于相邻两所述第一凸部31之间。所述第一凹部32和所述第一凸部31两者中的一者为液冷通道，另一者为泄压通道。
在一实施例中，所述第一凸部31可包括多个第一子部310，多个所述第一子部310之间相互连接。所述第一子部310的相对两边可以是弯折方向相反的弧段，例如弧段3101和弧段3102。所述第一子部310上可设有贯穿该第一子部310的避让孔30，所述避让孔30邻近所述第一子部310的其中一边的弧段设置。
在一实施例中，所述泄压组件5壁厚均匀且凹凸成型。具体的，所述第一冲压板3壁厚均匀且凹凸成型。
图5示出本申请实施例的第一冲压板底部的示意图。如图5所示，从图1自下而上看第一冲压板3的底部，所述第一冲压板3的底部上可设置有多个第二凹部33以及一第二凸部34。其中，多个所述第二凹部33可沿多个所述电芯1排布的行方向间隔设置，且多个所述第二凹部33之间可相互平行。所述第二凸部34可位于相邻两所述第二凹部33之间。
在一实施例中，所述第二凹部33可包括多个第二子部320，多个所述第二子部320之间相互连接。所述第二子部320的相对两边可以是弯折方向相反的弧段，例如弧段3201和弧段3202。所述第二子部320上可设有贯穿该第二子部320的避让孔30，所述避让孔30邻近所述第二子部320的其中一边的弧段设置。
在一实施例中，如图1所示，所述泄压组件5还可包括第二冲压板4，所述第二冲压板4可设置于所述第一冲压板3上，且位于所述第一冲压板3与多个所述电芯1的底部之间。
在一实施例中，所述第一凹部32与所述第二冲压板4间隔形成所述液冷通道，所述第一凸部抵接所述第二冲压板4，并且所述第一凸部31背离所述第二冲压板4的一侧形成所述泄压通道。
在一实施例中，所述第一凸部31和所述第二冲压板4上均设置有连通的避让孔，所述避让孔与所述电芯的泄压阀相对。例如，所述第二冲压板4上可设置有多个避让孔40，所述避让孔40、所述避让孔30以及所述电芯1对应设置。可选的，所述第二冲压板4可以为平面结构，所述第二冲压板4盖合于所述第一冲压板3的顶部上。
在一实施例中，所述第一凸部31和所述第二凹部33均为波浪形。如此，通过在电芯底部设计泄压阀避让孔，能够保留圆柱电芯底部泄压的优势，在电芯发生热失控时，火焰不会喷向乘坐仓人员，提升安全性，而将冲压板的流道设置为波浪形，能够进一步加强电芯冷却的性能，而且波浪形流道的设计更加易于形成流道扰流，进而增强冷板的换热性能。
在一实施例中，所述第二冷板22设置于对应的所述电芯1未设置所述泄压阀的一端，所述冷却组件2与所述液冷通道并联连通。所述第一冲压板3与所述冷却组件2并联设置，所述第二冲压板4与所述冷却组件2并联设置。通过将冷却组件与冲压板全并联设计，能够进一步降低冷却系统的压降，同时提升均温效果。
此外，本申请还提供了一种电池包，所述电池包包括所述冷却系统以及电芯组。
综上，本申请实施例通过在冷却组件中设置第一冷板和连接于第一冷板的第二冷板，并将第一冷板设置于对应行的电芯的侧部，第二冷板设置于对应行的电芯的顶部，且设置冷却组件与液冷通道并联，能够增大电芯换热的接触面积，进而提高电芯的换热效率，提升电芯的换热效果，从而解决大圆柱电池超级快充带来的高温问题，同时进一步降低冷却系统的压降，进一步提升均温效果。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。

Claims (17)

  1. 一种冷却系统，所述冷却系统设置于为电芯组散热，所述电芯组包括排布的多个电芯（1），所述冷却系统包括：
    至少一冷却组件（2），所述冷却组件（2）包括第一冷板（21）和连接于所述第一冷板（21）的第二冷板（22）；
    泄压组件（5），抵接于所述电芯（1）设有泄压阀的一端，所述泄压组件（5）设有间隔的液冷通道和泄压通道，所述泄压通道与所述电芯（1）的泄压阀连通；
    其中，所述第一冷板（21）设置于对应的所述电芯（1）的侧部，所述第二冷板（22）设置于对应的所述电芯（1）未设置所述泄压阀的一端，所述冷却组件（2）与所述液冷通道并联连通。
  2. 根据权利要求1所述的冷却系统，其中，所述第一冷板（21）沿多个所述电芯（1）排布方向延伸，且沿多个所述电芯（1）的高度方向展开。
  3. 根据权利要求1所述的冷却系统，所述第二冷板（22）沿多个所述电芯（1）排布方向延伸，且沿所述第一冷板（21）的厚度方向展开。
  4. 根据权利要求1-3任一项所述的冷却系统，其中，所述第一冷板（21）的延伸方向与所述第二冷板（22）的延伸方向相平行，所述第一冷板（21）的展开方向与所述第二冷板（22）的展开方向相垂直，所述第一冷板（21）和所述第二冷板（22）组成T型结构。
  5. 根据权利要求1所述的冷却系统，其中，所述第一冷板（21）包括：第一冷板本体（210），所述第一冷板本体（210）沿所述电芯（1）的高度方向安装于相邻两行所述电芯（1）之间，并与相邻两行所述电芯（1）相接触。
  6. 根据权利要求5所述的冷却系统，其中，所述第一冷板（21）还包括：分设于所述第一冷板本体（210）两端的第一侧板（211）和第二侧板（212），所述第一侧板（211）连接于所述第一冷板本体（210）的一端，所述第二侧板（212）连接于所述第一冷板本体（210）的另一端，所述第一侧板（211）和所述第二侧板（212）分别设置为进液和出液。
  7. 根据权利要求1所述的冷却系统，其中，所述第二冷板（22）包括：第二冷板本体（220），所述第二冷板本体（220）平铺于相邻两行所述电芯（1）的顶部表面上。
  8. 根据权利要求7所述的冷却系统，其中，所述第二冷板（22）还包括分设于所述第二冷板本体（220）两端的第一顶板（221）和第二顶板（222）；所述第一冷板（21）包括第一冷板本体（210），以及分设于所述第一冷板本体（210）两端的第一侧板（211）和第二侧板（212），所述第一顶板（221）设置于所述第一侧板（211）上，组成一T型结构，所述第二顶板（222）设置于所述第二侧板（212）上，组成另一T型结构。
  9. 根据权利要求7所述的冷却系统，其中，每个所述电芯（1）的顶部表面上设有凸起的极柱（10），所述第二冷板本体（220）具有两相对的第一板边（2201）和第二板边（2202），所述第一板边（2201）和第二板边（2202）分别与相邻两行所述电芯（1）的极柱（10）相对设置。
  10. 根据权利要求7所述的冷却系统，其中，所述第二冷板（22）还包括：分设于所述第二冷板本体（220）两端的第一顶板（221）和第二顶板（222），所述第一顶板（221）连接于所述第二冷板本体（220）的一端，所述第二顶板（222）连接于所述第二冷板本体（220）的另一端，所述第一顶板（221）和所述第二顶板（222）分别设置为进液和出液。
  11. 根据权利要求1所述的冷却系统，其中，所述泄压组件（5）包括第一冲压板（3）和第二冲压板（4），所述第一冲压板（3）的顶部设置有多个第一凸部（31）以及一第一凹部（32），所述第一凹部（32）位于相邻两所述第一凸部（31）之间，所述第一凹部（32）和所述第一凸部（31）两者中的一者为液冷通道，另一者为泄压通道。
  12. 根据权利要求11所述的冷却系统，其中，所述第一凸部（31）包括多个第一子部（310），多个所述第一子部（310）之间相互连接，所述第一子部（310）的相对两边为弯折方向相反的弧段。
  13. 根据权利要求11所述的冷却系统，其中，所述第一冲压板（3）的底部上可设置有多个第二凹部（33）以及一第二凸部（34），所述第二凸部（34）可位于相邻两所述第二凹部（33）之间，所述第一凸部（31）和所述第二凹部（33）均设置为波浪形。
  14. 根据权利要求11所述的冷却系统，其中，所述泄压组件（5）壁厚均匀且凹凸成型。
  15. 根据权利要求11所述的冷却系统，其中，所述第一凹部（32）与所述第二冲压板（4）间隔形成所述液冷通道，所述第一凸部（31）抵接所述第二冲压板（4），并且所述第一凸部（31）背离所述第二冲压板（4）的一侧形成所述泄压通道。
  16. 根据权利要求11所述的冷却系统，其中，所述第一凸部（31）和所述第二冲压板（4）上均设置有连通的避让孔，所述避让孔与所述电芯的泄压阀相对。
  17. 一种电池包，所述电池包包括如权利要求1-16任一项所述的冷却系统以及电芯组。
PCT/CN2024/107166 2023-07-24 2024-07-24 冷却系统及电池包 Pending WO2025021100A1 (zh)

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