WO2024255264A1 - 液冷装置、电池模组及储能系统 - Google Patents

液冷装置、电池模组及储能系统 Download PDF

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Publication number
WO2024255264A1
WO2024255264A1 PCT/CN2024/074606 CN2024074606W WO2024255264A1 WO 2024255264 A1 WO2024255264 A1 WO 2024255264A1 CN 2024074606 W CN2024074606 W CN 2024074606W WO 2024255264 A1 WO2024255264 A1 WO 2024255264A1
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WO
WIPO (PCT)
Prior art keywords
liquid cooling
cooling tube
pipe
tube group
group
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.)
Ceased
Application number
PCT/CN2024/074606
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English (en)
French (fr)
Inventor
马亚强
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.)
Xiamen Hithium Energy Storage Technology Co Ltd
Shenzhen Hithium Energy Storage Technology Co Ltd
Original Assignee
Xiamen Hithium Energy Storage Technology Co Ltd
Shenzhen Hithium Energy Storage Technology Co Ltd
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Publication date
Application filed by Xiamen Hithium Energy Storage Technology Co Ltd, Shenzhen Hithium Energy Storage Technology Co Ltd filed Critical Xiamen Hithium Energy Storage Technology Co Ltd
Publication of WO2024255264A1 publication Critical patent/WO2024255264A1/zh
Anticipated expiration legal-status Critical
Ceased 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
    • H01M10/61—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
    • H01M10/65—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
    • 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
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
    • 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 secondary batteries, and in particular to a liquid cooling device, a battery module and an energy storage system.
  • secondary batteries usually exist in the form of multiple battery cells connected in series to form a battery module.
  • the battery module is equipped with a liquid cooling plate, which is connected to a liquid cooling unit, so that the liquid cooling unit can form a coolant circulation loop with the liquid cooling plate, thereby achieving the purpose of thermal management of the battery module by means of heat exchange between the coolant and the battery module.
  • liquid cooling plates are one-piece stamped plates, which are covered on the outer surface of the battery module with adhesive.
  • the battery shell deforms and the liquid cooling plate cannot maintain close and effective contact with the battery module, resulting in reduced cooling uniformity of the battery module by the liquid cooling plate, leading to thermal management failure, affecting the service life and reliability of the battery module, and even causing serious safety risks.
  • a liquid cooling device comprising a first liquid cooling tube group, a second liquid cooling tube group and a connecting tube, one end of the connecting tube being connected to one end of the first liquid cooling tube group, and the other end of the connecting tube being connected to one end of the second liquid cooling tube group; wherein the relative side surfaces of the first liquid cooling tube group and the second liquid cooling tube group are respectively set as a first contact side and a second contact side, and a plane where the first contact side is located is parallel to or intersects with a plane where the second contact side is located.
  • the liquid cooling device When the liquid cooling device of the above scheme is used, the liquid cooling device is installed on the outside of the battery module and connected to the external liquid cooling unit.
  • the liquid cooling unit introduces coolant into the liquid cooling device.
  • the coolant exchanges heat with the battery module during the process of flowing through the first liquid cooling pipe group, the connecting pipe and the second liquid cooling pipe group, thereby taking away a large amount of heat generated by the battery module during operation, achieving heat dissipation and cooling effect on the battery module, that is, achieving the purpose of thermal management of the battery module.
  • the liquid cooling device Since the first contact side of the first liquid-cooling tube group and the second contact side of the second liquid-cooling tube group are integrally bent and formed, and the plane where the first contact side is located, the plane where the second contact side is located and the connecting tube together form a tubular bracket structure with an outlet, during the process of thermal management of the battery module by the liquid cooling device, when the battery module (large capacity, large size model) expands, causing the battery shell wall to deform and bulge to a large extent, the liquid cooling device is squeezed outward by the battery shell wall, so that the plane where the first contact side is located and the plane where the second contact side is located will intersect, so that it can adaptively deform with the shell wall deformation caused by the expansion of the battery, ensuring that the first contact side and the second contact side are always close to the battery shell wall, avoiding the problem of falling off and the generation of air gaps, and the liquid cooling device has a good thermal management effect on the battery module, thereby ensuring the service life and reliability of the battery module, and eliminating potential
  • a second aspect of the present application further provides a battery module, which includes the liquid cooling device as described above.
  • an energy storage system which comprises at least one battery module as described above.
  • FIG. 1 is a schematic structural diagram of a battery module according to an embodiment.
  • FIG. 2 is a schematic structural diagram of the liquid cooling device in FIG. 1 .
  • FIG. 3 is a schematic structural diagram of a battery module according to another embodiment.
  • FIG. 4 is a schematic structural diagram of the liquid cooling device in FIG. 3 .
  • FIG. 5 is a schematic diagram of the structure of a liquid cooling device equipped with a temperature equalizing plate.
  • FIG. 6 is a schematic side view of the structure of FIG. 1 .
  • FIG7 is a cross-sectional structural diagram of the A-A position in FIG6.
  • FIG. 8 is a partial enlarged structural diagram of point B in FIG. 7 .
  • 100 liquid cooling device; 10a: first liquid cooling tube group; 10b: second liquid cooling tube group; 11: liquid cooling tube unit; 111: first direct current tube section; 112: detour tube section; 113: second direct current tube section; 114: heat dissipation enhancement part; 114a: heat dissipation pipe; 114b: heat dissipation baffle; 114c: heat dissipation reinforcement flow channel; 12: connecting tube unit; 13: water guide tube unit; 131: bending section; 20: connecting tube; 21: first position limiting tube; 22: second position limiting tube; 23: supporting tube section; 30: temperature averaging plate; 31: accommodating chamber; 40: gap; 200: battery module; 210: battery cell; 220: pole; 230: connecting plate.
  • first and second are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number or order of the indicated technical features. Therefore, a feature defined as “first” or “second” may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality” is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
  • the battery module usually includes at least one single cell, and the single cell is provided with an electrode assembly to achieve cyclic charging and discharging.
  • a center hole is formed in the middle of the electrode assembly after winding.
  • the pole pieces of the electrode assembly tend to expand and generate a squeezing force toward the center hole, thereby causing the center hole to collapse.
  • the center hole of the electrode assembly will also collapse.
  • the present application provides a battery module, which includes a battery module 200 and a liquid cooling device 100.
  • the liquid cooling device 100 is installed outside the battery module 200 and is connected to a liquid cooling unit, so as to achieve heat dissipation and cooling of the battery module 200 and complete the thermal management of the battery module 200.
  • the battery module 200 includes a plurality of battery cells 210, which are electrically connected in series.
  • the battery capacity of the battery module 200 is the sum of the battery capacities of the plurality of battery cells 210, thereby increasing the energy density of the battery module 200 and improving the battery life.
  • FIG. 2 shows a liquid cooling device 100 according to an embodiment of the present application, which is used to be assembled with a battery module 200 to achieve thermal management thereof, and the liquid cooling device 100 is used to be arranged on the side of the battery module 200.
  • the liquid cooling device 100 can be directly attached to the side of the battery module 200, or the liquid cooling device 100 can also be attached to the side of the battery module 200 using adhesives such as structural adhesives and thermal conductive adhesives to improve the connection strength and reliability.
  • the specific installation method can be flexibly selected according to actual needs.
  • the liquid cooling device 100 includes a first liquid cooling tube group 10a, a second liquid cooling tube group 10b and a connecting tube 20, one end of the connecting tube 20 is connected to one end of the first liquid cooling tube group 10a, and the other end of the connecting tube 20 is connected to one end of the second liquid cooling tube group 10b; wherein, the relative side surfaces of the first liquid cooling tube group 10a and the second liquid cooling tube group 10b are respectively set as a first contact side and a second contact side, and the plane where the first contact side is located is parallel to or intersects with the plane where the second contact side is located.
  • the implementation of the technical solution of this embodiment will have the following beneficial effects: when the liquid cooling device 100 of the above solution is used, the liquid cooling device 100 is installed on the side of the battery module 200 and connected to an external liquid cooling unit.
  • the liquid cooling unit introduces coolant into the liquid cooling device 100.
  • the coolant exchanges heat with the battery module 200 during the process of flowing through the first liquid cooling pipe group 10a, the connecting pipe 20 and the second liquid cooling pipe group 10b, thereby taking away a large amount of heat generated by the battery module 200 during operation, achieving a heat dissipation and cooling effect on the battery module 200, that is, achieving the purpose of thermal management of the battery module 200.
  • the liquid cooling device 100 thermally managing the battery module 200, when the battery module 200 (large capacity, large size model) expands, causing the battery shell wall to deform and bulge to a large extent, the liquid cooling device 100 is squeezed outward by the battery shell wall, so that the plane where the first contact side is located and the plane where the second contact side is located will intersect, so that it can adaptively deform following the shell wall deformation caused by the battery expansion, ensuring that the first contact side and the second contact side are always close to the battery shell wall, avoiding the problem of falling off and the generation of air gaps, the liquid cooling device 100 has a good thermal management effect on the battery module 200, and can thereby ensure the service life and reliability of the battery module 200
  • the first contact side is the side of the first liquid cooling module 10a that is in direct contact with the heat-generating side of the battery module 200
  • the second contact side is the side of the second liquid cooling module 10b that is in direct contact with the heat-generating side of the battery module 200 .
  • the first liquid cooling tube group 10a, the second liquid cooling tube group 10b and the connecting tube 20 are integrally formed by bending the same pipe, so that the liquid cooling device 100 is easier to manufacture, has better structural integrity, and reduces potential leakage points of the coolant.
  • first liquid cooling tube group 10a and the second liquid cooling tube group 10b each include at least two liquid cooling tube units 11 and at least one connecting tube unit 12, the ends of two adjacent liquid cooling tube units 11 are connected by a connecting tube unit 12, and there is a gap 40 between two adjacent liquid cooling tube units 11.
  • the liquid cooling pipe unit 11 includes a first direct pipe section 111, a detour pipe section 112 and a second direct pipe section 113, and the first direct pipe section 111, the detour pipe section 112 and the second direct pipe section 113 are connected in sequence. It can be understood that one liquid cooling pipe unit 11 constitutes the first liquid cooling pipe group 10a and the second liquid cooling pipe group 10b of the smallest scale.
  • the first direct pipe section 111, the detour pipe section 112 and the second direct pipe section 113 are arranged in a C-shaped or U-shaped structure to meet the installation requirements when the side area of the battery cell 210 is small. It can be understood that the flow directions of the coolant in the first direct pipe section 111 and the second direct pipe section 113 are opposite.
  • the two liquid cooling tube units 11 will be squeezed open together with the plate surface. Since there is a gap 40 between the two adjacent liquid cooling tube units 11 in the vertical direction, the gap 40 allows the two adjacent liquid cooling tube units 11 to have relative freedom of movement and do not interfere with each other.
  • the first direct current pipe section 111, the detour pipe section 112 and the second direct current pipe section 113 can be metal round pipes or flat pipes such as copper pipes.
  • the first direct current pipe section 111, the detour pipe section 112 and the second direct current pipe section 113 in a C-shaped or U-shaped structure have a certain toughness and elasticity, that is, the three themselves and the three can swing, twist or bend and deform within a certain range. This characteristic becomes an important condition for the liquid cooling device 100 to adapt to the large deformation of the battery shell wall without separating from the battery shell wall.
  • the separately arranged first DC pipe section 111 and the second DC pipe section 113 can also significantly save the manufacturing materials of the liquid cooling device 100, while reducing the weight and cost while achieving a lightweight design of the battery module.
  • the connecting tube unit 12 can connect two adjacent liquid cooling tube units 11 into one and realize fluid communication, so that the surface area of the first liquid cooling tube group 10a and the second liquid cooling tube group 10b of the serpentine structure is greatly increased, so that more liquid cooling tube walls can contact the battery module 200 and participate in heat exchange and cooling, thereby strengthening the cooling effect on the battery module 200 and improving the thermal management efficiency.
  • the battery module 200 described in the present application is a large-capacity, large-size model, so the two opposite sides in the width direction of the battery module 200 are its large sides (i.e., the sides with the largest area), and the liquid cooling device 100 needs to be installed on the large sides to ensure better heat exchange and cooling effects.
  • the structures of the first liquid cooling tube group 10a and the second liquid cooling tube group 10b should be completely the same; of course, the structures of the first liquid cooling tube group 10a and the second liquid cooling tube group 10b may also be different according to actual needs. These can be flexibly selected according to actual needs.
  • the connecting tube 20 specifically includes a first limiting tube 21, a second limiting tube 22 and a supporting tube section 23 for connecting the first limiting tube 21 and the second limiting tube 22, and the ends of the first limiting tube 21 and the second limiting tube 22 away from the supporting tube section 23 are respectively connected to the two liquid cooling tube units 11 in a one-to-one correspondence; wherein the first limiting tube 21 and the second limiting tube 22 are respectively arranged on the corresponding sides of the battery module 200, and the supporting tube section 23 is arranged on the battery module 200. Bottom surface.
  • the support pipe section 23 is disposed between the first liquid cooling pipe group 10a and the second liquid cooling pipe group 10b, and one end of the support pipe section 23 extends to the plane where the first liquid cooling pipe group 10a is located, and the other end of the support pipe section 23 extends to the plane where the second liquid cooling pipe group 10b is located. That is, the extension length of the support pipe section 23 is consistent with the bottom surface width area of the battery module 200, so that the support pipe section 23 and the bottom surface of the battery module 200 obtain the maximum contact area, improve the support effect, and increase the heat exchange efficiency.
  • the support tube section 23 arranged on the bottom surface of the battery module 200 can support the battery module 200 to ensure that the battery module 200 is installed stably; in addition, the first position limiting tube 21 and the second position limiting tube 22 and the support tube section 23 are in a U-shaped structure, and the connection between the first position limiting tube 21 and the support tube section 23 and the connection between the second position limiting tube 22 and the support tube section 23 are elastic, which makes the first position limiting tube 21 and the second position limiting tube 22 arranged on the side of the battery module 200 have the ability to adapt to the telescopic expansion deformation of the side of the battery module 200, so that the entire liquid cooling device 100 can better adapt to the expansion of the battery module 200.
  • first liquid cooling pipe group 10a and the second liquid cooling pipe group 10b also include a water pipe unit 13, which is connected to the connecting pipe unit 12 or the liquid cooling pipe unit 11.
  • the water pipe unit 13 is extended along the length direction of the first liquid cooling pipe group 10a and the second liquid cooling pipe group 10b.
  • the purpose of setting the water pipe unit 13 is to facilitate the connection with the auxiliary pipes of the external liquid cooling unit to achieve the inflow and discharge of the coolant.
  • the water pipe unit 13 is provided with at least one bending section 131.
  • the bending section 131 of the first liquid cooling tube group 10a extends from the end of the water pipe unit 13 toward the second liquid cooling tube group 10b and then bends back to the plane where the first liquid cooling tube group 10a is located, thereby forming a first supporting portion between the first liquid cooling tube group 10a and the second liquid cooling tube group 10b.
  • the bending section 131 of the second liquid cooling tube group 10b extends from the end of the water pipe unit 13 toward the first liquid cooling tube group 10a and then bends back to the plane where the second liquid cooling tube group 10b is located, thereby forming a second supporting portion between the first liquid cooling tube group 10a and the second liquid cooling tube group 10b.
  • the first supporting portion and the second supporting portion cooperate to form a bottom supporting structure.
  • the first supporting portion and the second supporting portion are in contact with the bottom surface of the battery module 200 at the same time, which can not only increase the heat exchange area with the battery module 200, but also improve the heat exchange area of the battery module 200.
  • the block 200 forms a double-sided support, thereby increasing the overall structural strength of the battery module.
  • the bending section 131 is a pipe section in any shape such as C-shape, U-shape, or W-shape.
  • the auxiliary pipes of the liquid cooling unit include a liquid inlet pipe and a liquid return pipe, wherein the water pipe unit 13 of the first liquid cooling pipe group 10a is connected to the liquid inlet pipe via a connector installed thereon, and the water pipe unit 13 of the second liquid cooling pipe group 10b is connected to the liquid return pipe via a connector installed thereon.
  • the liquid cooling device 100 further includes a temperature averaging plate 30, the inner side of which is surrounded by a receiving cavity 31, and the connecting pipe 20, the first liquid cooling pipe group 10a and the second liquid cooling pipe group 10b are all arranged on the outer side of the temperature averaging plate 30 away from the receiving cavity 31.
  • the battery module 200 is inserted into the receiving cavity 31.
  • the liquid cooling device 100 can be first welded to the temperature equalizing plate 30 as a whole, and then the temperature equalizing plate 30 can be installed to the outside of the battery module 200 by bonding or other means and fit the bottom surface and two side surfaces in the width direction of the battery module 200. In addition to playing a role in protecting the safety of the battery module 200, it also helps to reduce the temperature difference and improve the cycle life of the battery module.
  • the battery module 200 In the actual operation of the battery module 200, it is connected to the bus through the pole 220.
  • the heat generated at the connection between the pole 220 and the bus is higher than that of other parts, especially the larger the capacity of the battery, the more obvious the heat generation. Therefore, the pole 220 and the connecting piece 230 of the battery module 200 are abnormally heated parts, and it is necessary to focus on heat management.
  • at least one liquid cooling pipe unit 11 arranged near the pole 220 and the connecting piece 230 of the battery module 200 is provided with a heat dissipation enhancement part 114.
  • the provision of the heat dissipation enhancement part 114 can increase the area involved in heat dissipation, achieve faster and more efficient heat conduction between the coolant and the battery module 200, and enhance the effect of thermal management performance.
  • the heat dissipation enhancement portion 114 includes a heat dissipation pipe 114a and at least one heat dissipation baffle 114b, and at least one heat dissipation baffle 114b is disposed on the inner side of the heat dissipation pipe 114a to separate the tube cavity of the heat dissipation pipe 114a to form at least two heat dissipation reinforcement channels 114c.
  • the heat dissipation tube 114a and the heat dissipation baffle 114b installed on the inner wall can significantly increase the tube wall area that can participate in heat dissipation, so that the coolant flowing through the heat dissipation reinforcement channel 114c can take away more heat per unit time, thereby enhancing the liquid cooling heat dissipation effect.
  • the heat dissipation enhancement part 114 can be regarded as an additional pipe fitting, which is installed inside the first liquid cooling straight tube 111 and/or the second liquid cooling straight tube 113 during installation.
  • the present application also provides an energy storage system, which includes at least one battery module as described in any of the above embodiments.

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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)
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Abstract

本申请涉及一种液冷装置(100)、电池模组及储能系统。所述液冷装置(100)包括第一液冷管组(10a)、第二液冷管组(10b)和连接管(20)，所述连接管(20)的一端与所述第一液冷管组(10a)的一端连接，所述连接管(20)的另一端与所述第二液冷管组(10b)的一端连接；其中，所述第一液冷管组(10a)和所述第二液冷管组(10b)的相对侧面分别设为第一接触侧和第二接触侧，所述第一接触侧所在平面与所述第二接触侧所在平面平行或相交。

Description

液冷装置、电池模组及储能系统
本申请要求于2023年06月15日提交中国专利局、申请号为2023107096644、申请名称为“液冷装置、电池模组及储能系统”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
本申请涉及二次电池技术领域，特别是涉及一种液冷装置、电池模组及储能系统。
背景技术
近些年来，市场对于二次电池的需求量不断增加，同时对电池的使用性能与可靠性也提出了更高的要求，这其中二次电池的热管理能力便是重点考量的一项因素。目前的二次电池通常以多个电池单体相互串联而构成电池模组的形式存在，电池模组通过装备液冷板，液冷板与液冷机组相连，使得液冷机组能与液冷板之间构成冷却液循环回路，从而借助冷却液与电池模组之间热交换而达到对电池模组的热管理目的。
然而，现有的液冷板大都为一体冲压板，通过粘胶贴覆在电池模组的外表面，当电池模组工作发生膨胀时，由于电池壳体发生变形，液冷板无法与电池模组保持紧密有效的接触，造成液冷板对电池模组的冷却均匀性降低，导致热管理失效，影响电池模组的使用寿命与可靠性，严重的还会引发安全风险。
发明内容
基于此，有必要针对散热效果差，导致热管理失效，影响电池模组使用寿命与可靠性的问题，提供一种液冷装置、电池模组及储能系统。
其技术方案如下：
本申请的第一方面，提供了一种液冷装置，所述液冷装置包括第一液冷管组、第二液冷管组和连接管，所述连接管的一端与所述第一液冷管组的一端连接，所述连接管的另一端与所述第二液冷管组的一端连接；其中，所述第一液冷管组和所述第二液冷管组的相对侧面分别设为第一接触侧和第二接触侧，所述第一接触侧所在平面与所述第二接触侧所在平面平行或相交。
上述方案的液冷装置使用时，将液冷装置安装到电池模块的外部并与外部的液冷机组相连，由液冷机组向液冷装置内通入冷却液，冷却液流经第一液冷管组、连接管和第二液冷管组的过程中与电池模块进行热交换，从而能将电池模块工作产生的大量热量带走，对电池模块实现散热降温效果，也即达到对电池模块热管理的目的。由于第一液冷管组的第一接触侧与第二液冷管组的第二接触侧是一体弯折成型的，且第一接触侧所在平面与第二接触侧所在平面以及连接管共同组成带有出口的管状支架结构，液冷装置对电池模块热管理的过程中，当电池模块(大容量、大尺寸型号)发生膨胀，导致电池壳壁发生较大程度形变凸起时，液冷装置被电池壳壁向外挤开，使得第一接触侧所在平面与第二接触侧所在平面会相交，从而就能跟随电池膨胀出现的壳壁形变而自适应变形，保证第一接触侧和第二接触侧始终紧贴电池壳壁，避免出现脱落问题而产生空气间隙，液冷装置对电池模快的热管理效果好，进而能保证电池模块使用寿命与可靠性，消除因热管理失效而潜在的安全隐患。
本申请的第二方面，还提供一种电池模组，其包括如上所述的液冷装置。
本申请的第三方面，还提供一种储能系统，其包括至少一个如上所述的电池模组。
本申请的一个或多个实施例的细节在下面的附图和描述中提出。本申请的其它特征、目的和优点将从说明书、附图以及权利要求书变得明显。
附图说明
为了更好地描述和说明本申请的实施例和/或示例，可以参考一幅或多幅附图。用于描述附图的附加细节或示例不应当被认为是对所公开的申请、目前描述的实施例和/或示例以及目前理解的这些申请的最佳模式中的任何一者的范围的限制。
图1为一实施例的电池模组的结构示意图。
图2为图1中液冷装置的结构示意图。
图3为另一实施例的电池模组的结构示意图。
图4为图3中液冷装置的结构示意图。
图5为安装了均温板的液冷装置的结构示意图。
图6为图1的侧视结构示意图。
图7为图6中A-A处的剖面结构图。
图8为图7中B处的局部放大结构图。
附图标记说明：
100：液冷装置；10a：第一液冷管组；10b：第二液冷管组；11：液冷
管单元；111：第一直流管段；112：迂回管段；113：第二直流管段；114：散热增强部；114a：散热管；114b：散热隔板；114c：散热补强流道；12：续接管单元；13：导水管单元；131：弯折段；20：连接管；21：第一限位管；22：第二限位管；23：支撑管段；30：均温板；31：容置腔；40：间隙；200：电池模块；210：电池单体；220：极柱；230：连接片。
具体实施方式
为了便于理解本申请，下面将参照相关附图对本申请进行更全面的描述。附图中给出了本申请的较佳实施例。但是，本申请可以以许多不同的形式来实现，并不限于本文所描述的实施例。应该理解，提供这些实施例的目的是使对本申请的公开内容的理解更加透彻全面。
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或顺序。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本申请的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请。
电动汽车等用电设备上配备电池模组进行供电，电池模组通常包括至少一个单体电池，而单体电池设置有电极组件，以实现循环式的充放电。
电极组件在卷绕后中部形成中心孔，在电极组件充放电的过程中，电极组件的极片容易膨胀并产生朝向中心孔方向的挤压作用力，进而导致中心孔塌陷；同时，若电池受到外力的挤压时，也会导致电极组件的中心孔塌陷。
参阅图1，图3和图6，本申请提供的一种电池模组，其包括电池模块200和液冷装置100。液冷装置100安装在电池模块200的外部，并通过与液冷机组相连，从而能实现对电池模块200散热降温，完成电池模块200的热管理作业。
其中，电池模块200包括若干个电池单体210，若干个电池单体210采用串联方式实现电连接。此时电池模块200的电池容量为若干个电池单体210的电池容量之和，以此达到增大电池模块200能量密度和提高续航能力的目的。
示例性地，请继续参阅图2，为本申请一实施例展示的一种液冷装置100，用于与电池模块200组装以实现对其热管理，液冷装置100用于设置在电池模块200的侧面上。例如，液冷装置100可以直接贴设在电池模块200的侧面，或者液冷装置100也可以采用结构胶、导热胶等粘胶粘贴于电池模块200的侧面，以提高连接强度与可靠性。具体安装方式根据实际需要进行灵活选择即可。
液冷装置100包括第一液冷管组10a、第二液冷管组10b和连接管20，连接管20的一端与第一液冷管组10a的一端连接，连接管20的另一端与第二液冷管组10b的一端连接；其中，第一液冷管组10a和第二液冷管组10b的相对侧面分别设为第一接触侧和第二接触侧，第一接触侧所在平面与第二接触侧所在平面平行或相交。
综上，实施本实施例技术方案将具有如下有益效果：上述方案的液冷装置100使用时，将液冷装置100安装到电池模块200的侧面上并与外部的液冷机组相连，由液冷机组向液冷装置100内通入冷却液，冷却液流经第一液冷管组10a、连接管20和第二液冷管组10b的过程中与电池模块200进行热交换，从而能将电池模块200工作产生的大量热量带走，对电池模块200实现散热降温效果，也即达到对电池模块200热管理的目的。
由于第一液冷管组10a的第一接触侧与第二液冷管组10b的第二接触侧是一体弯折成型的，且第一接触侧所在平面与第二接触侧所在平面以及连接管20共同组成带有出口的管状支架结构，液冷装置100对电池模块200热管理的过程中，当电池模块200(大容量、大尺寸型号)发生膨胀，导致电池壳壁发生较大程度形变凸起时，液冷装置100被电池壳壁向外挤开，使得第一接触侧所在平面与第二接触侧所在平面会相交，从而就能跟随电池膨胀出现的壳壁形变而自适应变形，保证第一接触侧和第二接触侧始终紧贴电池壳壁，避免出现脱落问题而产生空气间隙，液冷装置100对电池模块200的热管理效果好，进而能保证电池模块200使用寿命与可靠性， 消除因热管理失效而潜在的安全隐患。
其中，第一接触侧为第一液冷模组10a与电池模块200的发热侧面直接接触的侧面，第二接触侧为第二液冷模组10b与电池模块200的发热侧面直接接触的侧面。
较佳地，第一液冷管组10a、第二液冷管组10b和连接管20通过同一根管件经折弯方式一体成型。使得液冷装置100加工制造更加简单，结构整体性更好，减少冷却液潜在渗漏点。
此外，在一些实施例中第一液冷管组10a和第二液冷管组10b均包括至少两个液冷管单元11和至少一个续接管单元12，相邻两个液冷管单元11的端部通过一个续接管单元12连接，相邻两个液冷管单元11之间具有间隙40。
其中，液冷管单元11包括第一直流管段111、迂回管段112和第二直流管段113，第一直流管段111、迂回管段112和第二直流管段113依序连接。可以理解的，一个液冷管单元11构成最小规模的第一液冷管组10a和第二液冷管组10b。第一直流管段111、迂回管段112和第二直流管段113形成为C型或U型结构布置，从而满足电池单体210的侧面面积较小时的安装需要。可以理解的，冷却液在第一直流管段111和第二直流管段113内的流动方向相反。
相较于相邻两个液冷管单元11位于同一个板体面上，当电芯膨胀板体面被膨胀力挤开的时候，两个液冷管单元11都会随着板体面被挤开而一同被挤开而言，由于在竖直方向相邻的两个液冷管单元11之间具有间隙40，间隙40使相邻两个液冷管单元11具有相对活动的自由度，且彼此互不干扰，当板体面受膨胀力形变隆起时，不同的液冷管单元11能适应板体面不同部位的不同隆起高度进而产生不同程度的形变，从而就能保证各个液冷管单元11都能始终紧贴板体面，避免第一液冷管组10a和第二液冷管组10b与电池模块200之间形成空隙而影响冷却效果。
有必要说明的是，第一直流管段111、迂回管段112和第二直流管段113可以为铜管等金属圆管件或扁管件。借助其材料和形状特征，使得呈C型或U型结构下的第一直流管段111、迂回管段112和第二直流管段113具备一定的韧性和弹性，也即三者自身以及三者之间能够在一定幅度内摆动扭转或弯折变形。这种特性成为液冷装置100能自适应电池壳壁的大幅度变形而又不脱离电池壳壁的重要条件。
此外，相较于现有技术中一体式结构的液冷板而言，分体设置的第一直流管段111与第二直流管段113还能大幅节省液冷装置100的制造用材，同时减轻重量，降低成本的同时实现电池模组的轻量化设计。
在上述实施例的基础上，所有液冷管单元11和续接管单元12配合构成蛇形结构布置。续接管单元12能将相邻两个液冷管单元11连接为一体并实现流体连通，从而使蛇形结构的第一液冷管组10a和第二液冷管组10b的表面积大幅增加，使有更多的液冷管壁能与电池模块200接触而参与换热降温，强化对电池模块200的降温效果，提升热管理效能。
本申请中所述的电池模块200为大容量、大尺寸型号，因此电池模块200的宽度方向两个相对侧面均为其大面(即面积最大的侧面)，而液冷装置100就需要安装在该大面上，以保证更好的换热降温效果。
出于实际制造、成本等因素考虑，第一液冷管组10a和第二液冷管组10b的结构应当是完全相同的；当然，根据实际需要第一液冷管组10a和第二液冷管组10b的结构也可以是存在区别的。这些根据实际需要进行灵活选择即可。
如图4所示，在上述实施例的基础上，连接管20具体包括第一限位管21、第二限位管22以及用于连接第一限位管21和第二限位管22的支撑管段23，第一限位管21和第二限位管22远离支撑管段23的一端分别与两个液冷管单元11一一对应连接；其中，第一限位管21和第二限位管22分别设置于电池模块200的相对应的侧面，支撑管段23设置于电池模块200的 底面。支撑管段23设置于第一液冷管组10a和第二液冷管组10b之间，且支撑管段23的一端延伸至第一液冷管组10a所在平面，支撑管段23的另一端延伸至第二液冷管组10b所在平面。也即支撑管段23的延伸长度与电池模块的200的底面宽度区域一致，使支撑管段23与电池模块200的底面获得最大的接触面积，提高支撑效果，同时增加换热效能。
如此一来，设置于电池模块200的底面的支撑管段23能对电池模块200起到支撑作用，以保证电池模块200安装稳定；此外，第一限位管21和第二限位管22与支撑管段23呈U型结构，第一限位管21与支撑管段23的连接处以及第二限位管22与支撑管段23的连接处具有弹性，这使得布置在电池模块200的侧面的第一限位管21和第二限位管22具备适应电池模块200的侧面发生伸缩扩张形变的能力，使整个液冷装置100能够更好的适应电池模块200膨胀。
请继续参阅图2和图4，进一步地，第一液冷管组10a和第二液冷管组10b还均包括导水管单元13，导水管单元13与续接管单元12或者液冷管单元11连接，导水管单元13沿着第一液冷管组10a和第二液冷管组10b的长度方向延伸设置。导水管单元13的设置目的在于方便与外部的液冷机组的附属管件相连接，以实现冷却液的流入和排出。
导水管单元13设有至少一个弯折段131，第一液冷管组10a的弯折段131从导水管单元13的端部向第二液冷管组10b方向延伸后再弯折回至第一液冷管组10a所在平面，从而在第一液冷管组10a和第二液冷管组10b之间形成第一承托部，第二液冷管组10b的弯折段131从导水管单元13的端部向第一液冷管组10a方向延伸后再弯折回至第二液冷管组10b所在平面，从而在第一液冷管组10a和第二液冷管组10b之间形成第二承托部，第一承托部与第二承托部配合构成底部承托结构。
因而第一承托部和第二承托部(即两个弯折段131)同时与电池模块200的底面抵接，不仅可以增大与电池模块200的换热面积，同时对电池模 块200形成双侧托举支撑，从而增大电池模组的整体结构强度。
可选地，弯折段131为一截C型、U型、W型等其中任意一种形状的管段。
具体而言，液冷机组的附属管件包括进液管和回液管，其中第一液冷管组10a的导水管单元13通过其上安装的连接头与进液管连接，第二液冷管组10b的导水管单元13通过其上安装的连接头与回液管连接。
请继续参阅图5，此外，在另一些实施例中，液冷装置100还包括均温板30，均温板30内侧围成有容置腔31，连接管20、第一液冷管组10a和第二液冷管组10b均设置于均温板30背离容置腔31的外侧。安装时，电池模块200插置在容置腔31内。
当电池模块200的尺寸较大，且电池模块200需要做壳体防护时，可以将液冷装置100先与均温板30焊接为一体，然后再将均温板30采用粘接等方式安装到电池模块200的外部并贴合电池模块200的底面和宽度方向两个侧面，在起到对电池模块200安全防护作用之外，还有助于降低温差，提高电池模组循环寿命。
在电池模块200实际工作中，其通过极柱220与汇流排相连，极柱220与汇流排的连接处产生的热量较之其它部位更高，特别是越大容量的电池产热越明显。所以电池模块200的极柱220、连接片230部位是发热异常部位，有必要进行重点热量管控。请继续参阅图7和图8，在一些实施例中，至少靠近电池模块200的极柱220与连接片230布置的一个液冷管单元11设有散热增强部114。设置散热增强部114能提高参与散热的面积，达到更快、更高效使冷却液与电池模块200进行热量传导，强化热管理效能的效果。
具体地，在少一些实施例中，散热增强部114包括散热管114a和至少一个散热隔板114b，至少一个散热隔板114b设置于散热管114a的内侧，以将散热管114a的管腔分隔形成至少两个散热补强流道114c。相较于现有 的只具有三个方向管壁的散热管114a而言，散热管114a及其内壁上安装的散热隔板114b能够显著增加能够参与散热的管壁面积，使单位时间内流经于散热补强流道114c内的冷却液能将更多的热量带走，实现增强液冷散热效果。散热增强部114可看做附加管件，安装时穿设在第一液冷直管111和/或第二液冷直管113内部。
综上之外，本申请还提供一种储能系统，其包括至少一个如上任一实施例所述的电池模组。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准，说明书及附图可以用于解释权利要求的内容。

Claims (11)

  1. 一种液冷装置，包括第一液冷管组、第二液冷管组和连接管，所述连接管的一端与所述第一液冷管组的一端连接，所述连接管的另一端与所述第二液冷管组的一端连接；其中，所述第一液冷管组和所述第二液冷管组的相对侧面分别设为第一接触侧和第二接触侧，所述第一接触侧所在平面与所述第二接触侧所在平面平行或相交。
  2. 根据权利要求1所述的液冷装置，其中，所述第一液冷管组、所述第二液冷管组和所述连接管通过同一根管件经折弯方式一体成型。
  3. 根据权利要求1所述的液冷装置，其中，所述第一液冷管组和所述第二液冷管组均包括至少两个液冷管单元和至少一个续接管单元，相邻两个所述液冷管单元的端部通过一个所述续接管单元连接，相邻两个所述液冷管单元之间具有间隙。
  4. 根据权利要求3所述的液冷装置，其中，所述第一液冷管组和所述第二液冷管组还均包括导水管单元，所述导水管单元与所述续接管单元或所述液冷管单元连接，所述导水管单元沿着所述第一液冷管组和所述第二液冷管组的长度方向延伸设置；
    所述导水管单元设有至少一个弯折段，所述第一液冷管组的所述弯折段从所述导水管单元的端部向所述第二液冷管组方向延伸后再弯折回至所述第一液冷管组所在平面，从而在所述第一液冷管组和所述第二液冷管组之间形成第一承托部，所述第二液冷管组的所述弯折段从所述导水管单元的端部向所述第一液冷管组方向延伸后再弯折回至所述第二液冷管组所在平面，从而在所述第一液冷管组和所述第二液冷管组之间形成第二承托部，所述第一承托部与所述第二承托部配合构成底部承托结构。
  5. 根据权利要求3所述的液冷装置，其中，所述连接管包括支撑管段，所述支撑管段设置于所述第一液冷管组和所述第二液冷管组之间，且所述支撑管段的一端延伸至所述第一液冷管组所在平面，所述支撑管段的另一端延 伸至所述第二液冷管组所在平面。
  6. 根据权利要求5所述的液冷装置，其中，所述连接管还包括第一限位管和第二限位管，所述支撑管段用于连接所述第一限位管和所述第二限位管，所述第一限位管和所述第二限位管远离所述支撑管段的一端分别与两个所述液冷管单元一一对应连接。
  7. 根据权利要求3所述的液冷装置，其中，所述液冷管单元包括第一直流管段、迂回管段和第二直流管段，所述第一直流管段、所述迂回管段和所述第二直流管段依序连接；
    所有所述液冷管单元和所述续接管单元配合构成蛇形结构布置。
  8. 根据权利要求1所述的液冷装置，其中，所述液冷装置还包括均温板，所述均温板内侧围成有容置腔，所述连接管、所述第一液冷管组和所述第二液冷管组均设置于所述均温板背离所述容置腔的外侧。
  9. 根据权利要求3所述的液冷装置，其中，所述液冷管单元设有散热增强部，所述散热增强部包括散热管和至少一个散热隔板，至少一个所述散热隔板设置于所述散热管的内侧，以将所述散热管的管腔分隔形成至少两个散热补强流道。
  10. 一种电池模组，包括如权利要求1至9任一项所述的液冷装置。
  11. 一种储能系统，包括至少一个如权利要求10所述的电池模组。
PCT/CN2024/074606 2023-06-15 2024-01-30 液冷装置、电池模组及储能系统 Ceased WO2024255264A1 (zh)

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CN116799415B (zh) * 2023-08-18 2024-01-02 欣旺达动力科技股份有限公司 一种电池包及用电设备
CN221486614U (zh) * 2023-11-29 2024-08-06 比亚迪股份有限公司 冷却管道、电池组件及用电装置
CN117477107A (zh) * 2023-12-28 2024-01-30 深圳市德兰明海新能源股份有限公司 液冷机箱及储能装置
CN119695335A (zh) * 2024-12-20 2025-03-25 清安储能技术(重庆)有限公司 一种侧面冷却结构及储能设备

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