WO2020253507A1 - 温控组件及电池包 - Google Patents

温控组件及电池包 Download PDF

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Publication number
WO2020253507A1
WO2020253507A1 PCT/CN2020/093512 CN2020093512W WO2020253507A1 WO 2020253507 A1 WO2020253507 A1 WO 2020253507A1 CN 2020093512 W CN2020093512 W CN 2020093512W WO 2020253507 A1 WO2020253507 A1 WO 2020253507A1
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WO
WIPO (PCT)
Prior art keywords
side wall
temperature control
battery
extension
control assembly
Prior art date
Application number
PCT/CN2020/093512
Other languages
English (en)
French (fr)
Inventor
宿永强
王增忠
吴布维
周灵刚
Original Assignee
宁德时代新能源科技股份有限公司
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Filing date
Publication date
Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to US17/044,485 priority Critical patent/US20230163381A1/en
Priority to EP20775798.0A priority patent/EP3780146B1/en
Priority to JP2021568932A priority patent/JP7410980B2/ja
Priority to KR1020217035970A priority patent/KR20210149139A/ko
Publication of WO2020253507A1 publication Critical patent/WO2020253507A1/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
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • H01M10/6557—Solid parts with flow channel passages or pipes for heat exchange arranged between the 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
    • H01M10/61—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
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch 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
    • H01M10/655—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
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6554—Rods or plates
    • H01M10/6555—Rods or plates arranged between the 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
    • H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
    • 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
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • 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

  • This application relates to the field of battery technology, and in particular to a temperature control component and a battery pack.
  • Battery packs usually include multiple batteries grouped together.
  • the group technology in addition to ensuring the strength and performance of the structure itself, it is also necessary to consider the impact of the structure on the battery life. Temperature and expansion force have a great impact on the battery life. Therefore, thermal management and expansion force design must be considered in the design.
  • the battery pack In terms of thermal management design: At present, there are mainly two methods of water cooling and air cooling. Among them, due to the high cost of the water cooling method, the battery pack generally uses air cooling for heat dissipation.
  • expansion force design during the charging and discharging process of the battery pack, the battery will gradually expand and interact with the fixed structure (ie, expansion force).
  • expansion force ie, expansion force
  • an appropriate expansion force will be beneficial to the battery's own reaction, but an excessive expansion force will cause the battery to be over-stressed and cause lithium evolution, and even cause irreversible capacity loss, thereby greatly reducing the battery life.
  • the batteries are directly attached to each other and strengthen the external structure to directly resist the expansion force.
  • the disadvantage of this method is: when the battery capacity and the battery form a string As the number gradually increases, the expansion force of the batteries after they are grouped will become greater and greater, thereby reducing the battery life; (2) A buffer pad and other structures are added between the batteries, which absorb the expansion force through the expansion and contraction characteristics of the material, thereby reducing the cost
  • the disadvantage of this method is that the large surface of the battery is close to the cushion, and only the side and bottom of the battery can be used to dissipate heat, thus reducing the heat dissipation efficiency; (3) The battery is separated from the battery and the middle is empty.
  • the shortcoming of this method is that the battery expands freely at the beginning, and it is easy to react insufficiently under no pressure, which reduces the service life. At the same time, if the battery swells larger, the gap is reserved. When it is too large, the volume of the group will be affected.
  • the purpose of this application is to provide a temperature control assembly and a battery pack.
  • the temperature control assembly meets the thermal management requirements of the battery while being effective. This greatly reduces the force of the temperature control component on the surface of the battery, thereby greatly improving the service life of the battery.
  • the present application provides a temperature control assembly, which includes a temperature control tube.
  • the temperature control tube has a first side wall and a second side wall, which is arranged opposite to the first side wall in the longitudinal direction, and the second side wall is connected to the first side wall and forms a cavity together with the first side wall.
  • At least part of the outer surface of the first side wall is formed as an arc-shaped surface that is recessed in the longitudinal direction toward the second side wall; and/or, at least part of the outer surface of the second side wall is formed as a recess in the longitudinal direction toward the first side wall.
  • the temperature control tube further has: a partition wall extending in the longitudinal direction and connected to the first side wall and the second side wall to divide the cavity into a plurality of channels.
  • the first side wall has: a first main body portion formed as an arc-shaped surface recessed toward the second side wall in the longitudinal direction; and a first extension portion connected to one end of the first main body portion and extending in the vertical direction.
  • the second side wall has: a second main body portion formed as an arc-shaped surface recessed toward the first side wall in the longitudinal direction; and a second extension portion connected to one end of the second main body portion and extending in the vertical direction, and the second The extension part is arranged opposite to the first extension part in the longitudinal direction.
  • the temperature control assembly further includes: a first insulating member sleeved outside the first extension part and the second extension part.
  • the first insulator has: a first body portion; and a first opening groove provided in the first body portion.
  • the depth direction of the first opening groove is arranged in the vertical direction, and the first opening groove is provided for the first extension and the second The extension is inserted.
  • the first body portion has: a first upper wall located on one side of the first extension portion and the second extension portion in the vertical direction; and two first clamping walls that sandwich the first extension portion and the second extension portion in the longitudinal direction
  • Each first clip wall is connected to the first upper wall and extends in the up-down direction, and the thickness of each first clip wall gradually decreases in the up-down direction from the first upper wall to the direction away from the first upper wall.
  • the first side wall further has a third extension part connected to the other end of the first main body part and extending in the up-down direction.
  • the second side wall further has: a fourth extension part connected to the other end of the second main body part and extending in the vertical direction, and the fourth extension part is arranged opposite to the third extension part in the longitudinal direction.
  • the temperature control assembly further includes: a second insulating member sleeved on the outside of the third extension part and the fourth extension part.
  • the second insulator has: a second body portion; and a second opening groove provided in the second body portion.
  • the depth direction of the second opening groove is arranged in the vertical direction, and the second opening groove is provided for the third extension portion and the fourth The extension is inserted.
  • the second body portion has: a second upper wall located on one side of the third extension portion and the fourth extension portion in the vertical direction; and two second clamping walls that sandwich the third extension portion and the fourth extension portion in the longitudinal direction ,
  • Each second clamping wall is connected to the second upper wall and extends in the up-down direction, and the thickness of each second clamping wall decreases in the up-down direction from the second upper wall to the direction away from the second upper wall.
  • the present application also provides a battery pack, which includes a plurality of batteries and the above-mentioned temperature control assembly, the plurality of batteries includes a first battery and a second battery, and the temperature control assembly is disposed on the first battery and the second battery between.
  • the heat dissipation treatment of the battery can be realized to ensure that the temperature control component meets the thermal management requirements of the battery.
  • the large surfaces of two adjacent batteries will squeeze the first side wall and the second side wall, and because at least part of the outer surface of the first side wall is formed as The arc-shaped surface and/or at least part of the outer surface of the second side wall is formed as an arc-shaped surface.
  • This arc-shaped surface structure increases the difference between the first side wall and/or the second side wall and the large surface of the corresponding battery.
  • the contact area can be consistent with the shape of the corresponding battery after the large surface is bulged, thereby effectively reducing the force of the temperature control tube on the battery, thereby greatly improving the service life of the battery.
  • Figure 1 is a perspective view of the battery pack of the present application
  • FIG. 2 is a schematic diagram of the positional relationship between two adjacent batteries and corresponding temperature control components in FIG. 1;
  • FIG 3 is an exploded view of the temperature control assembly in Figure 1;
  • Figure 4 is a front view of the temperature control tube in Figure 3;
  • Fig. 5 is an assembly diagram of the air duct assembly and the lower case of the battery pack.
  • first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance;
  • plural means Refers to two or more (including two);
  • connection can be direct connection or indirect connection through an intermediate medium.
  • the battery pack of the present application includes a temperature control assembly 1, a plurality of batteries 2, a lower box body 3, an air duct assembly 4, a fan 5, a cable tie 6, an upper box cover 7, an end plate 8, and installation Panel 9 and wiring harness isolation board (not shown).
  • the plurality of batteries 2 includes a first battery 2A and a second battery 2B, and the temperature control assembly 1 is disposed between the first battery 2A and the second battery 2B.
  • the number of the first battery 2A and the second battery 2B may be multiple, the first battery 2A and the second battery 2B are arranged alternately in sequence, and each adjacent first battery 2A and second battery 2A in the longitudinal direction Y
  • the temperature control components 1 can be arranged between the batteries 2B.
  • the temperature control assembly 1 may include a temperature control tube 11, a first insulating member 12 and a second insulating member 13. Wherein, the first insulating member 12 and the second insulating member 13 are respectively sleeved on two ends of the temperature control tube 11 in the vertical direction Z.
  • the temperature control tube 11 is used to heat the battery 2, and in order to ensure the strength and thermal conductivity of the temperature control tube 11, the temperature control tube 11 may be made of a metal material, such as an aluminum profile.
  • the temperature control tube 11 may have a first side wall 111, a second side wall 112, a partition wall 113, a first connecting wall 114 and a second connecting wall 115.
  • the first side wall 111, the second side wall 112, the partition wall 113, the first connecting wall 114, and the second connecting wall 115 can be integrally formed by an aluminum extrusion process.
  • the first side wall 111 and the second side wall 112 are opposed to each other in the longitudinal direction Y, and the second side wall 112 is connected to the first side wall 111 through the first connecting wall 114 and the second connecting wall 115, whereby the first side wall 111, the second side wall 112, the first connecting wall 114, and the second connecting wall 115 together form a frame structure with a cavity.
  • the first side wall 111 and the second side wall 112 are arranged directly facing the large surface of the corresponding battery 2.
  • At least part of the outer surface of the first side wall 111 is formed as an arc-shaped surface that is recessed in the longitudinal direction Y toward the second side wall 112. After the temperature control assembly 1 and the battery 2 are assembled, a gap S is formed between the first side wall 111 and the corresponding battery 2, and the gap S provides an expansion space for the expansion and deformation of the battery 2.
  • the large surface of the battery 2 gradually bulges into the gap S and squeezes the outer surface of the first side wall 111. At least part of the surface is formed as an arc-shaped surface.
  • This arc-shaped surface structure increases the contact area between the first side wall 111 and the large surface of the corresponding battery 2, and can adhere to the shape of the large surface of the corresponding battery 2. Therefore, the force of the temperature control tube 11 on the battery 2 is effectively reduced, thereby greatly improving the service life of the battery 2.
  • the first side wall 111 may have: a first body portion 111A formed as an arc-shaped surface recessed toward the second side wall 112 along the longitudinal direction Y; and a first extension portion 111B connected to the first body One end of the portion 111A extends in the vertical direction Z; and the third extension portion 111C is connected to the other end of the first main body portion 111A and extends in the vertical direction Z.
  • the first main body portion 111A corresponds to the middle position of the corresponding battery 2
  • the first extension portion 111B and the third extension portion 111C correspond to the two end positions of the corresponding battery 2 in the vertical direction Z.
  • the first extension 111B corresponding to the upper and lower ends of the battery 2
  • the third extension part 111C can be directly formed as a planar structure.
  • At least part of the outer surface of the second side wall 112 is formed as an arc-shaped surface that is recessed toward the first side wall 111 along the longitudinal direction Y.
  • the large surface of the battery 2 gradually bulges into the gap S and squeezes the outer surface of the second side wall 112. At least part of the surface is formed as an arc-shaped surface.
  • This arc-shaped surface structure increases the contact area between the second side wall 112 and the large surface of the corresponding battery 2, and can adhere to the shape of the large surface of the corresponding battery 2. Therefore, the force of the temperature control tube 11 on the battery 2 is effectively reduced, thereby greatly improving the service life of the battery 2.
  • the second side wall 112 may have: a second body portion 112A formed as an arc-shaped surface recessed toward the first side wall 111 along the longitudinal direction Y; and a second extension portion 112B connected to the second body One end of the portion 112A extends in the vertical direction Z, and the second extension portion 112B is disposed opposite to the first extension portion 111B along the longitudinal direction Y; and the fourth extension portion 112C is connected to the other end of the second main body portion 112A and extends along the vertical direction Z extends, and the fourth extension 112C is disposed opposite to the third extension 111C along the longitudinal direction Y.
  • the second main body portion 112A corresponds to the middle position of the corresponding battery 2
  • the second extension portion 112B and the fourth extension portion 112C correspond to the two end positions of the corresponding battery 2 in the vertical direction Z.
  • the second extension 112B corresponding to the upper and lower ends of the battery 2
  • the fourth extension 112C may be directly formed as a planar structure.
  • both the first side wall 111 and the second side wall 112 form a gap S with the corresponding battery 2.
  • the large surfaces of two adjacent batteries 2 ie, the first battery 2A and the second battery 2B
  • the partition wall 113 extends along the longitudinal direction Y and is connected to the first side wall 111 and the second side wall 112 to divide the cavity into a plurality of channels F.
  • the arrangement of the partition wall 113 not only improves the strength of the temperature control tube 11, but also ensures that the temperature control tube 11 has enough space for outside air to circulate, so that the temperature control assembly 1 meets the thermal management requirements of the battery 2.
  • the first connecting wall 114 is connected to an end of the first extension portion 111B away from the first body portion 111A and an end of the second extension portion 112B away from the second body portion 112A, and the first connecting wall 114 and the second An extension portion 111B and a second extension portion 112B are received in the first insulating member 12 together.
  • the first connecting wall 114 may be formed in a flat structure or an arc structure.
  • the second connecting wall 115 is connected to an end of the third extension portion 111C away from the first body portion 111A and an end of the fourth extension portion 112C away from the second body portion 112A, and the second connecting wall 115 and the first The three extension portions 111C and the fourth extension portion 112C are received in the second insulating member 13 together.
  • the second connecting wall 115 may be formed in a flat structure or an arc structure.
  • the first insulating member 12 is sleeved on the outside of the first extension portion 111B of the first side wall 111 and the second extension portion 112B of the second side wall 112, and is in direct contact with two adjacent batteries 2 .
  • the first insulating member 12 is made of an insulating buffer material. to make.
  • the first insulating member 12 may have: a first body portion 121; and a first opening groove 122 disposed in the first body portion 121, the groove depth direction of the first opening groove 122 is arranged along the vertical direction Z, and the first opening groove 122
  • the opening groove 122 is for inserting the first extension portion 111B, the second extension portion 112B and the first connecting wall 114.
  • the first body portion 121 may have: a first upper wall 121A located on one side of the first extension portion 111B and the second extension portion 112B in the up-down direction Z; and two first clamping walls 121B, which sandwich the first wall in the longitudinal direction Y An extension portion 111B and a second extension portion 112B.
  • Each first clamping wall 121B is connected to the first upper wall 121A and extends along the vertical direction Z, and the thickness of each first clamping wall 121B extends from the first upper wall 121A along the vertical direction Z It gradually decreases in the direction away from the first upper wall 121A.
  • the second insulating member 13 is sleeved on the outside of the third extension portion 111C of the first side wall 111 and the fourth extension portion 112C of the second side wall 112, and is in direct contact with two adjacent batteries 2 .
  • the second insulating member 13 also uses an insulating buffer material production.
  • the second insulating member 13 may have: a second body portion 131; and a second opening groove 132 disposed in the second body portion 131, the groove depth direction of the second opening groove 132 is arranged along the vertical direction Z, and the second The opening groove 132 is for inserting the third extension portion 111C, the fourth extension portion 112C and the second connecting wall 115.
  • the second body portion 131 may have: a second upper wall 131A located on one side of the third extension portion 111C and the fourth extension portion 112C in the vertical direction Z; and two second clamping walls 131B, which sandwich the first The three extension portions 111C and the fourth extension portion 112C.
  • Each second clamping wall 131B is connected to the second upper wall 131A and extends along the vertical direction Z, and the thickness of each second clamping wall 131B extends from the second upper wall 131A along the vertical direction Z It gradually decreases in the direction away from the second upper wall 131A.
  • the lower case 3 is used to support the plurality of batteries 2.
  • the plurality of batteries 2 can be arranged in at least two rows of battery rows in the transverse direction X, and the air duct assembly 4 is arranged between the two rows of battery rows and fixed to the lower box 3.
  • the air duct assembly 4 and the corresponding battery row form an air duct, and the air duct is connected to a plurality of channels F of the corresponding temperature control assembly 1 and the fan 5.
  • the air duct assembly 4 may include an air volume adjusting plate 41, a first supporting plate 42, a second supporting plate 43, a mounting plate 44 and a sealing strip 45.
  • the air volume adjusting plate 41 is arranged in the air duct, the first supporting plate 42 and the second supporting plate 43 are spaced apart in the longitudinal direction Y, and the first supporting plate 42 is close to the fan 5. Wherein, the height of the air volume adjustment plate 41 is successively reduced along the direction of the first support plate 42 toward the second support plate 43, so that the air duct expands from the side close to the fan 5 to the side away from the fan 5 in the longitudinal direction Y.
  • the installation plate 44 extends along the longitudinal direction Y and is connected to the first support plate 42 and the second support plate 43, and the air volume adjustment plate 41 is fixedly installed on the installation plate 44.
  • the sealing strip 45 is disposed on the first supporting plate 42, the second supporting plate 43 and the mounting plate 44. After the air duct assembly 4 and the plurality of batteries 2 are assembled, the sealing strip 45 is adhered to the corresponding battery row to be sealed to the battery row.
  • the end plates 8 are arranged at both ends of each battery row in the longitudinal direction Y.
  • the cable tie 6 is circumferentially tightened to correspond to all the batteries 2 in a battery row, the corresponding temperature control assembly 1 and the corresponding two end plates 8.
  • the installation panel 9 is located outside the corresponding end plate 8 in the longitudinal direction Y, is fixedly connected to the lower box body 3 and the corresponding end plate 8, and is fixedly installed with the fan 5.
  • the wire harness isolation plate is arranged above the plurality of batteries 2 and is directly fixed to the end plate 8, thereby helping to improve the efficiency of the battery pack and the degree of integration.
  • the upper box cover 7 is arranged above the wire harness isolation board and is fixedly connected to the wire harness isolation board by fasteners (such as rivets).
  • fasteners such as rivets

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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)
  • Battery Mounting, Suspending (AREA)
  • Secondary Cells (AREA)

Abstract

本申请提供了一种温控组件及电池包，温控组件包括温控管。温控管具有：第一侧壁；第二侧壁，与第一侧壁一起形成有空腔。第一侧壁的外表面的至少部分形成为向第二侧壁凹入的弧形面；和/或，第二侧壁的外表面的至少部分形成为向第一侧壁凹入的弧形面。当外部空气流经温控管时，即可实现对电池的散热处理。当电池产生膨胀变形时，相邻两个电池会挤压第一侧壁和第二侧壁，而由于第一侧壁的外表面的至少部分形成为弧形面、和/或第二侧壁的外表面的至少部分形成为弧形面，这种弧形面结构增大了第一侧壁和/或第二侧壁与电池大面的接触面积、且与电池大面鼓出后的形状贴合，从而降低了温控管对电池的作用力，提高了电池的使用寿命。

Description

温控组件及电池包
本申请要求于2019年06月18日提交中国专利局、申请号为201920919814.3、申请名称为“温控组件及电池包”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电池技术领域，尤其涉及一种温控组件及电池包。
背景技术
电池包通常包括成组在一起的多个电池。在成组技术中，除了保证结构自身强度和性能外，还需要考虑结构对于电池寿命的影响，其中温度和膨胀力对于电池寿命影响很大，所以在设计时必须考虑热管理和膨胀力设计。
在热管理设计方面：目前主要有水冷和风冷两种方式。其中，由于水冷方式的成本较高，因而电池包普遍采用风冷方式进行散热。
在膨胀力设计方面：电池包在充放电过程中，电池会逐渐产生膨胀、且与固定结构产生相互作用力(即膨胀力)。其中，适当的膨胀力会有益于电池自身反应，但是过大的膨胀力会使得电池受压过大而发生析锂现象，甚至产生不可逆的容量损失，从而极大地降低了电池的寿命。
为了缓解膨胀力，目前主要有以下几种形式：(1)电池之间直接贴紧、加强外部结构，以直接抵抗膨胀力，这种方式的不足之处在于：当电池容量和电池成组串数逐渐提升时，电池成组后的膨胀力会越来越大，从而降低了电池使用寿命；(2)电池间增加缓冲垫等结构，其通过材料自身伸缩特性来吸收膨胀力，从而降低成组后的膨胀力，这种方式的不足之处在于：电池大面紧贴缓冲垫，只能采用电池侧面和底部散热，由此降低了散热效率；(3)电池与电池隔开，中间空出间隙，以使得电池自由膨胀，这种方式的不足之处在于：电池初始时为自由膨胀，在无压力下容易反应不充分，降低了使用寿命，同时若电池膨胀量较大、预留间隙过大时，影响成组体 积。
发明内容
鉴于背景技术中存在的问题，本申请的目的在于提供一种温控组件及电池包，当温控组件应用于电池包中时，温控组件在满足对电池的热管理要求的同时，还有效地降低了温控组件对电池表面的作用力，从而极大地提高了电池的使用寿命。
为了实现上述目的，本申请提供了一种温控组件，其包括温控管。所述温控管具有：第一侧壁；第二侧壁，沿纵向与第一侧壁相对设置，且第二侧壁连接于第一侧壁并与第一侧壁一起形成有空腔。第一侧壁的外表面的至少部分形成为沿纵向向第二侧壁凹入的弧形面；和/或，第二侧壁的外表面的至少部分形成为沿纵向向第一侧壁凹入的弧形面。
温控管还具有：分隔壁，沿纵向延伸并连接于第一侧壁和第二侧壁，以将所述空腔划分为多个通道。
第一侧壁具有：第一主体部，形成为沿纵向向第二侧壁凹入的弧形面；以及第一延伸部，连接于第一主体部的一端并沿上下方向延伸。第二侧壁具有：第二主体部，形成为沿纵向向第一侧壁凹入的弧形面；以及第二延伸部，连接于第二主体部的一端并沿上下方向延伸，且第二延伸部沿纵向与第一延伸部相对设置。
温控组件还包括：第一绝缘件，套设于第一延伸部和第二延伸部外侧。
第一绝缘件具有：第一本体部；以及第一开口槽，设置于第一本体部，第一开口槽的槽深方向沿上下方向设置，且第一开口槽供第一延伸部和第二延伸部插入。
第一本体部具有：第一上壁，在上下方向上位于第一延伸部和第二延伸部一侧；以及两个第一夹壁，在纵向上包夹第一延伸部和第二延伸部，各第一夹壁连接于第一上壁并沿上下方向延伸，且各第一夹壁的厚度沿上下方向自第一上壁向远离第一上壁的方向依次递减。
第一侧壁还具有：第三延伸部，连接于第一主体部的另一端并沿上下方向延伸。第二侧壁还具有：第四延伸部，连接于第二主体部的另一端并沿上下方向延伸，且第四延伸部沿纵向与第三延伸部相对设置。温控组件 还包括：第二绝缘件，套设于第三延伸部和第四延伸部外侧。
第二绝缘件具有：第二本体部；以及第二开口槽，设置于第二本体部，第二开口槽的槽深方向沿上下方向设置，且第二开口槽供第三延伸部和第四延伸部插入。
第二本体部具有：第二上壁，在上下方向上位于第三延伸部和第四延伸部一侧；以及两个第二夹壁，在纵向上包夹第三延伸部和第四延伸部，各第二夹壁连接于第二上壁并沿上下方向延伸，且各第二夹壁的厚度沿上下方向自第二上壁向远离第二上壁的方向依次递减。
本申请还提供了一种电池包，其包括多个电池以及上述所述的温控组件，所述多个电池包括第一电池和第二电池，温控组件设置于第一电池与第二电池之间。
本申请的有益效果如下：
当外部空气流经温控管时，即可实现对电池的散热处理，以保证温控组件满足对电池的热管理要求。且在电池包的工作过程中，当电池产生膨胀变形时，相邻两个电池的大面会挤压第一侧壁和第二侧壁，而由于第一侧壁的外表面的至少部分形成为弧形面、和/或第二侧壁的外表面的至少部分形成为弧形面，这种弧形面结构增大了第一侧壁和/或第二侧壁与对应电池的大面的接触面积、且能够与对应电池的大面鼓出后的形状贴合一致，从而有效地降低了温控管对电池的作用力，由此极大地提高了电池的使用寿命。
附图说明
图1是本申请的电池包的立体图；
图2是图1中的相邻两个电池与对应的温控组件的位置关系示意图；
图3是图1中的温控组件的分解图；
图4是图3中的温控管的主视图；
[根据细则26改正19.06.2020]　
图5是电池包的风道组件与下箱体的组装图。
具体实施方式
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本申请，并不用于限定本申请。
在本申请的描述中，除非另有明确的规定和限定，术语“第一”、“第二”仅用于描述的目的，而不能理解为指示或暗示相对重要性；术语“多个”是指两个以上(包括两个)；除非另有规定或说明，术语“连接”、应做广义理解，例如，“连接”可以是固定连接，也可以是可拆卸连接，或一体地连接，或电连接，或信号连接；“连接”可以是直接相连，也可以通过中间媒介间接相连。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。
本说明书的描述中，需要理解的是，本申请实施例所描述的“上”、“下”、等方位词是以附图所示的角度来进行描述的，不应理解为对本申请实施例的限定。下面通过具体的实施例并结合附图对本申请做进一步的详细描述。
参照图1至图5，本申请的电池包包括温控组件1、多个电池2、下箱体3、风道组件4、风机5、扎带6、上箱盖7、端板8、安装面板9以及线束隔离板(未示出)。
参照图1和图2，所述多个电池2包括第一电池2A和第二电池2B，温控组件1设置于第一电池2A与第二电池2B之间。进一步地，第一电池2A和第二电池2B在数量上可均为多个、第一电池2A和第二电池2B依次交错排列，且在纵向Y上每相邻的第一电池2A和第二电池2B之间可均设置温控组件1。
参照图2至图4，温控组件1可包括温控管11、第一绝缘件12以及第二绝缘件13。其中，第一绝缘件12和第二绝缘件13分别套设于温控管11在上下方向Z上的两端。
温控管11用于对电池2进行散热处理，而为了保证温控管11的强度以及导热性，温控管11可由金属材料制成，如铝型材。
温控管11可具有第一侧壁111、第二侧壁112、分隔壁113、第一连接壁114以及第二连接壁115。其中，第一侧壁111、第二侧壁112、分隔壁113、第一连接壁114以及第二连接壁115可采用挤铝工艺一体成型。
第一侧壁111与第二侧壁112在纵向Y上相对设置，且第二侧壁112 通过第一连接壁114和第二连接壁115连接于第一侧壁111，由此第一侧壁111、第二侧壁112、第一连接壁114以及第二连接壁115一起形成带有空腔的围框结构。其中，第一侧壁111和第二侧壁112直接面向对应电池2的大面设置，当外部空气流经温控管11的空腔时，即可实现对电池2的散热处理，以保证温控组件1满足对电池2的热管理要求。
第一侧壁111的外表面的至少部分形成为沿纵向Y向第二侧壁112凹入的弧形面。当温控组件1与电池2组装后，第一侧壁111与对应的电池2之间形成有间隙S，所述间隙S为电池2的膨胀变形提供膨胀空间。
在电池包的工作过程中，当电池2产生膨胀变形时，电池2的大面逐渐鼓入所述间隙S中并挤压第一侧壁111的外表面，而由于第一侧壁111的外表面的至少部分形成为弧形面，这种弧形面结构增大了第一侧壁111与对应电池2的大面的接触面积、且能够与对应电池2的大面鼓出后的形状贴合一致，从而有效地降低了温控管11对电池2的作用力，由此极大地提高了电池2的使用寿命。
具体地，参照图4，第一侧壁111可具有：第一主体部111A，形成为沿纵向Y向第二侧壁112凹入的弧形面；第一延伸部111B，连接于第一主体部111A的一端并沿上下方向Z延伸；以及第三延伸部111C，连接于第一主体部111A的另一端并沿上下方向Z延伸。
需要说明的是，第一主体部111A与对应电池2的中部位置对应、第一延伸部111B和第三延伸部111C与对应电池2在上下方向Z上的两端位置对应。在电池2的膨胀过程中，由于电池2在上下方向Z上的两端产生的变形较小、而电池2的中部产生的变形较大，因此与电池2上下两端对应的第一延伸部111B和第三延伸部111C可直接形成为平面结构。
第二侧壁112的外表面的至少部分形成为沿纵向Y向第一侧壁111凹入的弧形面。当温控组件1与电池2组装后，第二侧壁112与对应的电池2之间形成有间隙S，所述间隙S为电池2的膨胀变形提供膨胀空间。
在电池包的工作过程中，当电池2产生膨胀变形时，电池2的大面逐渐鼓入所述间隙S中并挤压第二侧壁112的外表面，而由于第二侧壁112的外表面的至少部分形成为弧形面，这种弧形面结构增大了第二侧壁112与对应电池2的大面的接触面积、且能够与对应电池2的大面鼓出后的形状贴合一致，从而有效地降低了温控管11对电池2的作用力，由此极大地 提高了电池2的使用寿命。
具体地，参照图4，第二侧壁112可具有：第二主体部112A，形成为沿纵向Y向第一侧壁111凹入的弧形面；第二延伸部112B，连接于第二主体部112A的一端并沿上下方向Z延伸，且第二延伸部112B沿纵向Y与第一延伸部111B相对设置；以及第四延伸部112C，连接于第二主体部112A的另一端并沿上下方向Z延伸，且第四延伸部112C沿纵向Y与第三延伸部111C相对设置。
需要说明的是，第二主体部112A与对应电池2的中部位置对应、第二延伸部112B和第四延伸部112C与对应电池2在上下方向Z上的两端位置对应。在电池2的膨胀过程中，由于电池2在上下方向Z上的两端产生的变形较小、而电池2的中部产生的变形较大，因此与电池2上下两端对应的第二延伸部112B和第四延伸部112C可直接形成为平面结构。
当第一侧壁111的外表面的至少部分形成为沿纵向Y向第二侧壁112凹入的弧形面，且第二侧壁112的外表面的至少部分也形成为沿纵向Y向第一侧壁111凹入的弧形面时，第一侧壁111和第二侧壁112均与对应的电池2形成有间隙S。
在电池包的工作过程中，当电池2产生膨胀变形时，相邻两个电池2(即第一电池2A和第二电池2B)的大面分别鼓入对应的间隙S中并挤压第一侧壁111和第二侧壁112。由于第一侧壁111的弧形面结构能够与对应电池2大面鼓出后的形状贴合一致、第二侧壁112的弧形面结构也能够与对应电池2大面鼓出后的形状贴合一致，从而有效地降低了温控管11对电池2的作用力，由此极大地提高了电池2的使用寿命。
参照图2至图4，分隔壁113沿纵向Y延伸并连接于第一侧壁111和第二侧壁112，以将所述空腔划分为多个通道F。这里，分隔壁113的设置，不仅提高了温控管11的强度，还保证了温控管11具有足够的供外部空气流通的空间，从而使得温控组件1满足对电池2的热管理要求。
参照图3和图4，第一连接壁114连接于第一延伸部111B远离第一主体部111A的一端以及第二延伸部112B远离第二主体部112A的一端，且第一连接壁114与第一延伸部111B、第二延伸部112B一起收容于第一绝缘件12。其中，第一连接壁114可形成为平板状结构或弧形状结构。
参照图3和图4，第二连接壁115连接于第三延伸部111C远离第一主 体部111A的一端以及第四延伸部112C远离第二主体部112A的一端，且第二连接壁115与第三延伸部111C、第四延伸部112C一起收容于第二绝缘件13。其中，第二连接壁115可形成为平板状结构或弧形状结构。
参照图2和图3，第一绝缘件12套设于第一侧壁111的第一延伸部111B和第二侧壁112的第二延伸部112B外侧、并与相邻两个电池2直接接触。虽然电池2在上下方向Z上的两端产生的变形较小，为了有效降低温控组件1对电池2的作用力、并起到绝缘作用，优选地，第一绝缘件12采用绝缘缓冲材料制成。
具体地，第一绝缘件12可具有：第一本体部121；以及第一开口槽122，设置于第一本体部121，第一开口槽122的槽深方向沿上下方向Z设置，且第一开口槽122供第一延伸部111B、第二延伸部112B和第一连接壁114插入。
第一本体部121可具有：第一上壁121A，在上下方向Z上位于第一延伸部111B和第二延伸部112B一侧；以及两个第一夹壁121B，在纵向Y上包夹第一延伸部111B和第二延伸部112B，各第一夹壁121B连接于第一上壁121A并沿上下方向Z延伸，且各第一夹壁121B的厚度沿上下方向Z自第一上壁121A向远离第一上壁121A的方向依次递减。
参照图2和图3，第二绝缘件13套设于第一侧壁111的第三延伸部111C和第二侧壁112的第四延伸部112C外侧、并与相邻两个电池2直接接触。虽然电池2在上下方向Z上的两端产生的变形较小，为了有效降低温控组件1对电池2的作用力、并起到绝缘作用，优选地，第二绝缘件13也采用绝缘缓冲材料制成。
具体地，第二绝缘件13可具有：第二本体部131；以及第二开口槽132，设置于第二本体部131，第二开口槽132的槽深方向沿上下方向Z设置，且第二开口槽132供第三延伸部111C、第四延伸部112C和第二连接壁115插入。
第二本体部131可具有：第二上壁131A，在上下方向Z上位于第三延伸部111C和第四延伸部112C一侧；以及两个第二夹壁131B，在纵向Y上包夹第三延伸部111C和第四延伸部112C，各第二夹壁131B连接于第二上壁131A并沿上下方向Z延伸，且各第二夹壁131B的厚度沿上下方向Z自第二上壁131A向远离第二上壁131A的方向依次递减。
参照图1，下箱体3用于支撑所述多个电池2。所述多个电池2在横向X上可排列成至少两排电池排，风道组件4设置于两排电池排之间并固定于下箱体3。风道组件4与对应的电池排形成有风道，且所述风道连通于对应的温控组件1的多个通道F和风机5。
具体地，参照图5，风道组件4可包括风量调节板41、第一支撑板42、第二支撑板43、安装板44以及密封条45。
风量调节板41设置于所述风道内，第一支撑板42与第二支撑板43在纵向Y上间隔设置且第一支撑板42靠近风机5。其中，风量调节板41的高度沿第一支撑板42朝向第二支撑板43的方向依次减小，以使所述风道沿纵向Y从靠近风机5一侧向远离风机5一侧扩张。
安装板44沿纵向Y延伸并连接于第一支撑板42和第二支撑板43，且风量调节板41固定安装于安装板44。密封条45设置于第一支撑板42、第二支撑板43以及安装板44上。当风道组件4与多个电池2完成装配后，密封条45粘接于对应的电池排以与该电池排密封连接。
电池包在使用过程中，在风机5的作用下，外部空气能够进入温控组件1的多个通道F中，以实现对电池2的散热。同时，基于风量调节板41的设置，外部空气进入不同温控组件1的量不同，由此实现对所有电池2的均匀散热。
参照图1，端板8在纵向Y上设置于各电池排两端。扎带6沿周向箍紧对应一个电池排中的所有电池2、对应的温控组件1以及对应的两个端板8。安装面板9在纵向Y上位于对应的端板8外侧、固定连接于下箱体3以及对应的端板8、并固定安装风机5。
参照图1，线束隔离板设置于所述多个电池2上方并直接固定于端板8，由此有助于提高电池包的成组效率以及一体化程度。上箱盖7设置于线束隔离板的上方并通过紧固件(如铆钉)与线束隔离板固定连接。这里，由于上箱盖7的周侧未设置卡扣等复杂结构，因而其可采用吸塑工艺直接加工而成，从而降低了加工成本。

Claims (10)

  1. 一种温控组件，其特征在于，包括温控管(11)，所述温控管(11)具有：
    第一侧壁(111)；
    第二侧壁(112)，沿纵向(Y)与第一侧壁(111)相对设置，且第二侧壁(112)连接于第一侧壁(111)并与第一侧壁(111)一起形成有空腔；
    第一侧壁(111)的外表面的至少部分形成为沿纵向(Y)向第二侧壁(112)凹入的弧形面；和/或
    第二侧壁(112)的外表面的至少部分形成为沿纵向(Y)向第一侧壁(111)凹入的弧形面。
  2. 根据权利要求1所述的温控组件，其特征在于，温控管(11)还具有：分隔壁(113)，沿纵向(Y)延伸并连接于第一侧壁(111)和第二侧壁(112)，以将所述空腔划分为多个通道(F)。
  3. 根据权利要求1或2所述的温控组件，其特征在于，
    第一侧壁(111)具有：第一主体部(111A)，形成为沿纵向(Y)向第二侧壁(112)凹入的弧形面；以及第一延伸部(111B)，连接于第一主体部(111A)的一端并沿上下方向(Z)延伸；
    第二侧壁(112)具有：第二主体部(112A)，形成为沿纵向(Y)向第一侧壁(111)凹入的弧形面；以及第二延伸部(112B)，连接于第二主体部(112A)的一端并沿上下方向(Z)延伸，且第二延伸部(112B)沿纵向(Y)与第一延伸部(111B)相对设置。
  4. 根据权利要求3所述的温控组件，其特征在于，温控组件(1)还包括：第一绝缘件(12)，套设于第一延伸部(111B)和第二延伸部(112B)外侧。
  5. 根据权利要求4所述的温控组件，其特征在于，第一绝缘件(12)具有：第一本体部(121)；以及第一开口槽(122)，设置于第一本体部(121)，第一开口槽(122)的槽深方向沿上下方向(Z)设置，且第一开口槽(122)供第一延伸部(111B)和第二延伸部(112B)插入。
  6. 根据权利要求5所述的温控组件，其特征在于，第一本体部(121) 具有：第一上壁(121A)，在上下方向(Z)上位于第一延伸部(111B)和第二延伸部(112B)一侧；以及两个第一夹壁(121B)，在纵向(Y)上包夹第一延伸部(111B)和第二延伸部(112B)，各第一夹壁(121B)连接于第一上壁(121A)并沿上下方向(Z)延伸，且各第一夹壁(121B)的厚度沿上下方向(Z)自第一上壁(121A)向远离第一上壁(121A)的方向依次递减。
  7. 根据权利要求3-6任一项所述的温控组件，其特征在于，
    第一侧壁(111)还具有：第三延伸部(111C)，连接于第一主体部(111A)的另一端并沿上下方向(Z)延伸；
    第二侧壁(112)还具有：第四延伸部(112C)，连接于第二主体部(112A)的另一端并沿上下方向(Z)延伸，且第四延伸部(112C)沿纵向(Y)与第三延伸部(111C)相对设置；
    温控组件(1)还包括：第二绝缘件(13)，套设于第三延伸部(111C)和第四延伸部(112C)外侧。
  8. 根据权利要求7所述的温控组件，其特征在于，第二绝缘件(13)具有：第二本体部(131)；以及第二开口槽(132)，设置于第二本体部(131)，第二开口槽(132)的槽深方向沿上下方向(Z)设置，且第二开口槽(132)供第三延伸部(111C)和第四延伸部(112C)插入。
  9. 根据权利要求8所述的温控组件，其特征在于，第二本体部(131)具有：第二上壁(131A)，在上下方向(Z)上位于第三延伸部(111C)和第四延伸部(112C)一侧；以及两个第二夹壁(131B)，在纵向(Y)上包夹第三延伸部(111C)和第四延伸部(112C)，各第二夹壁(131B)连接于第二上壁(131A)并沿上下方向(Z)延伸，且各第二夹壁(131B)的厚度沿上下方向(Z)自第二上壁(131A)向远离第二上壁(131A)的方向依次递减。
  10. 一种电池包，其特征在于，包括多个电池(2)以及权利要求1-9中任一项所述的温控组件(1)，所述多个电池(2)包括第一电池(2A)和第二电池(2B)，温控组件(1)设置于第一电池(2A)与第二电池(2B)之间。
PCT/CN2020/093512 2019-06-18 2020-05-29 温控组件及电池包 WO2020253507A1 (zh)

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