WO2022156400A1 - 电池液冷板总成、电池总成及车辆 - Google Patents

电池液冷板总成、电池总成及车辆 Download PDF

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Publication number
WO2022156400A1
WO2022156400A1 PCT/CN2021/135935 CN2021135935W WO2022156400A1 WO 2022156400 A1 WO2022156400 A1 WO 2022156400A1 CN 2021135935 W CN2021135935 W CN 2021135935W WO 2022156400 A1 WO2022156400 A1 WO 2022156400A1
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WO
WIPO (PCT)
Prior art keywords
cooling
liquid
plate
battery
grooves
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PCT/CN2021/135935
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English (en)
French (fr)
Inventor
卢军
乔延涛
孙焕丽
刘鹏
姜云峰
周琪
孙士杰
Original Assignee
中国第一汽车股份有限公司
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Application filed by 中国第一汽车股份有限公司 filed Critical 中国第一汽车股份有限公司
Publication of WO2022156400A1 publication Critical patent/WO2022156400A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—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
    • H01M10/65—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
    • 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 safety, for example, to a battery liquid cooling plate assembly, a battery assembly and a vehicle.
  • New energy vehicles have the characteristics of high energy efficiency, zero emissions, no pollution, high specific energy, low noise and high reliability.
  • the power battery assembly mainly ensures the functions of the vehicle's driving, braking energy recovery, and energy regulation of the hybrid engine system. The importance of battery assembly is self-evident as the core component of battery assembly structure protection and fixation.
  • the liquid cooling plate is responsible for the functions of cooling, heating, and temperature equalization of the battery.
  • the liquid-cooling plate solution in the related art does not realize the modular design of the liquid-cooling plate, and one product can often only be applied to one battery pack, the reuse rate is extremely low, and the maintenance cost is relatively high.
  • the present application provides a battery liquid-cooling plate assembly, a battery assembly and a vehicle, which have simple manufacturing process, low mold cost, low requirements for layout space, can realize the modular design of the liquid-cooling plate, and can be applied to a variety of new energy sources Battery pack, high applicability.
  • a battery liquid cold plate assembly including:
  • the upper plate of the liquid cooling plate and the lower plate of the liquid cooling plate, the upper plate of the liquid cooling plate is fixedly connected above the lower plate of the liquid cooling plate, and the upper plate of the liquid cooling plate and the lower plate of the liquid cooling plate are formed between the upper plate and the lower plate of the liquid cooling plate.
  • There are cooling channels the lower plate of the liquid cooling plate is provided with a plurality of cooling grooves, the upper plate of the liquid cooling plate is provided with a plurality of openings corresponding to the plurality of cooling grooves, and the plurality of openings correspond to the plurality of cooling grooves.
  • the cooling grooves are arranged in a one-to-one correspondence, and the battery module is fixed in the cooling groove through the opening portion and is sealed with the liquid cooling plate; at least one cooling groove is provided on the groove wall of each cooling groove. a flow hole, through which the plurality of cooling grooves communicate;
  • the cooling liquid joint is arranged on the plate of the liquid cooling plate and communicates with the cooling flow channel, the cooling groove on one side of the cooling liquid joint is connected with the cooling flow channel, and the cooling liquid is in the cooling flow channel. channel and the cooling grooves.
  • the liquid cooling plate lower plate may include:
  • the battery module fixing boss is protruded on the groove bottoms of the plurality of cooling grooves, and is configured to fix the battery module.
  • the battery module can be adhered to the battery module fixing boss.
  • the lower plate of the liquid cooling plate may also include:
  • At least one cross beam and at least one longitudinal beam, the at least one transverse beam and the at least one longitudinal beam are crossed to form the plurality of cooling grooves.
  • the battery module and the liquid cooling plate can be bonded and fixed with a sealant.
  • the cooling liquid joint may include a liquid inlet joint and a liquid outlet joint
  • the cooling flow channel may include a liquid inlet flow channel and a liquid outlet flow channel
  • the liquid inlet joint is communicated with the liquid inlet flow channel
  • the outlet The liquid joint is communicated with the liquid outlet channel.
  • Each cooling groove may be rectangular, and the plurality of cooling grooves may be distributed on the lower plate of the liquid cooling plate in a rectangular array.
  • the cooling liquid may be a high temperature resistant insulating cooling liquid.
  • a battery assembly is also provided, including the battery liquid cold plate assembly described in any of the above technical solutions.
  • FIG. 1 is a schematic structural diagram of a battery liquid cold plate assembly provided by an embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of the assembly of a battery liquid cold plate assembly and a battery module provided by an embodiment of the present application;
  • FIG. 3 is a schematic structural diagram of a lower plate of a liquid cooling plate provided by an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of the assembly of the lower plate of the liquid cooling plate and the battery module according to an embodiment of the present application.
  • Lower plate of liquid cooling plate 21. Cooling groove; 22. Flow hole; 23. Body of lower plate; 24. Fixed boss of battery module; 25. Beam; 26. Longitudinal beam;
  • the terms “upper”, “lower”, “left”, “right”, “vertical”, “horizontal”, “inner”, “outer”, etc. indicate the orientation or positional relationship based on the attached
  • the orientation or positional relationship shown in the figure, or the orientation or positional relationship that the product of the application is usually placed in use, is only for the convenience of describing the application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, construction and operation in a particular orientation, and therefore should not be construed as a limitation on the present application.
  • the terms “first”, “second”, “third”, etc. are only used to differentiate the description and should not be construed as indicating or implying relative importance.
  • “plurality” means two or more.
  • connection should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection , can also be an electrical connection.
  • arrangement and “connection” should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection , can also be an electrical connection.
  • connection should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection , can also be an electrical connection.
  • a first feature "on” or “under” a second feature may include direct contact between the first feature and the second feature, or may include the first feature and the second feature Not directly but through additional features between them.
  • the first feature being “above”, “over” and “above” the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature.
  • the first feature is “below”, “below” and “below” the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.
  • the battery liquid cooling plate assembly may include a liquid cooling upper plate 1 , a liquid cooling lower plate 2 and a cooling liquid joint 3 , wherein the upper plate 1 of the liquid cooling plate is fixed above the lower plate 2 of the liquid cooling plate, a cooling channel is formed between the upper plate 1 of the liquid cooling plate and the lower plate 2 of the liquid cooling plate, and the lower plate 2 of the liquid cooling plate is arranged on There are a plurality of cooling grooves 21.
  • the liquid cooling plate 1 is provided with a plurality of openings 11 corresponding to the plurality of cooling grooves 21.
  • the plurality of openings 11 and the plurality of cooling grooves 21 are provided in a one-to-one correspondence.
  • the opening 11 is partially fixed in the cooling groove 21 and is sealed with the liquid cooling plate 1; at least one flow hole 22 is provided on the groove wall of each cooling groove 21, and the plurality of cooling grooves 21 pass through the flow hole 22 Connected.
  • the cooling liquid joint 3 is arranged on the plate 1 of the liquid cooling plate and communicates with the cooling channel.
  • the cooling groove 21 on one side of the cooling liquid joint 3 is connected with the cooling channel, and the cooling liquid is in the cooling channel and the cooling channel 21. Circulation, in which all the cooling grooves 21 are communicated inside, can form a flow channel.
  • one battery module 4 may correspond to one cooling groove 21 .
  • the liquid cooling plate assembly provided in this embodiment adopts the design of semi-open cooling grooves 21, which realizes the semi-submerged cooling of the battery module 4 by the cooling liquid, improves the working efficiency of the product, and can effectively realize the cooling of the battery module 4.
  • Thermal management function and the battery module 4 is in the cooling liquid immersion environment for a long time, the battery module 4 is relatively safe. Once thermal runaway occurs, the heat of the battery module 4 will be quickly transferred to the cooling liquid, and the cooling liquid will take away a lot of heat. Delay the thermal runaway of the battery module 4 ; the cooling groove 21 has the function of fixing and limiting the battery module 4 , which omits other fixing structures and can limit the expansion and deformation of the battery module 4 .
  • the liquid-cooling plate assembly provided in this embodiment has a simple manufacturing process, low mold cost, high space utilization, and low requirements for layout space, and can realize the modular design of the liquid-cooling plate.
  • the installation can be applied to various new energy battery packs such as pure electric vehicles (Electric Vehicle, EV), plug-in hybrid electric vehicles (Plug-in Hybrid Electric Vehicle, PHEV), hybrid electric vehicles (Hybrid Electric Vehicle, HEV), etc. It has high reliability and low maintenance cost, and realizes the purpose of sharing the same liquid cooling plate assembly for multiple battery products, which has the effect of shortening the research and development cycle and reducing the research and development cost.
  • the lower plate 2 of the liquid-cooling plate is a stamped aluminum structure, but it is different from the ordinary liquid-cooling plate. As shown in FIG. 3 , the lower plate 2 of the liquid-cooling plate also includes a lower plate body 23, a battery module fixing boss 24, At least one transverse beam 25 and at least one longitudinal beam 26 . At least one transverse beam 25 and at least one longitudinal beam 26 are arranged on the lower plate body 23 and crossed to form a plurality of cooling grooves 21; the battery module fixing bosses 24 are protruded from the bottom of the cooling grooves 21, and are arranged as The battery module 4 is fixed; the lower plate body 23 is provided with the plurality of cooling grooves 21 .
  • the battery module 4 is in contact with the battery module fixing boss 24 , which improves the cold and heat exchange efficiency between the battery module 4 and the lower plate 2 of the liquid cooling plate, that is, improves the heat dissipation efficiency of the battery module 4 .
  • the battery module 4 is adhered to the battery module fixing boss 24 .
  • the battery module 4 and the liquid cooling plate 1 are bonded and fixed by a sealant.
  • no structure such as fixing bolts is required, which can improve the installation and fixing strength of the battery assembly and ensure the stable connection of the battery module 4 .
  • the cooling liquid joint 3 includes a liquid inlet joint and a liquid outlet joint
  • the cooling flow channel includes a liquid inlet flow channel and a liquid outlet flow channel
  • the liquid inlet joint is communicated with the liquid inlet flow channel
  • the liquid outlet joint is connected with the liquid outlet flow channel. connected. Since the cooling groove 21 on the side of the cooling liquid joint 3 is connected with the cooling flow channel, the cooling liquid flows from the liquid inlet joint into the liquid inlet flow channel and then flows into the cooling groove 21 closest to the liquid inlet flow channel, and then passes through The flow holes 22 flow into the plurality of cooling grooves 21 to evenly distribute the liquid, and perform thermal management on the battery modules 4 placed in the cooling grooves 21 . When the coolant needs to be replaced, the coolant can flow out of the outlet joint through the outlet channel. Valves are arranged on the liquid inlet and outlet joints, which can control the on-off of the joints.
  • the upper plate 1 of the liquid cooling plate and the lower plate 2 of the liquid cooling plate are both rectangular, the cooling grooves 21 are also rectangular, and the plurality of cooling grooves 21 are distributed on the lower plate 2 of the liquid cooling plate in a rectangular array.
  • the plurality of cooling grooves 21 are evenly distributed on the lower plate 2 of the liquid cooling plate, which facilitates the even distribution of the cooling liquid in the plurality of cooling grooves 21 and ensures the thermal management effect of the plurality of battery modules 4 .
  • the upper plate 1 of the liquid cooling plate and the lower plate 2 of the liquid cooling plate in this embodiment are fixed by brazing, including a stamped aluminum plate, an inflated aluminum plate, and the like.
  • the battery module 4 in this embodiment includes a battery cell in the form of a rectangular parallelepiped, and the explosion-proof valves of the battery module 4 are located at two ends of the battery cell, respectively.
  • the rectangular cooling grooves 21 can limit and fix the battery module 4 without other fixing structures in the X and Y directions, thereby saving manufacturing costs.
  • the battery module 4 will expand after being charged and discharged.
  • the battery module 4 is fixed inside the half-open cooling groove 21 , and the cooling groove 21 can limit the expansion and deformation of the battery module 4 .
  • the battery module 4 in this embodiment is a specially-made battery module 4 whose bottom is insulated and whose protection level reaches a protection level (Ingress Protection Rating, IP67).
  • the battery liquid cold plate assembly provided in this embodiment can effectively implement a thermal management function for the battery module 4 on the one hand, and can effectively delay the thermal runaway of the battery module 4 on the other hand.
  • the battery liquid cold plate assembly is designed with a semi-open cooling groove 21, the battery module 4 is directly bonded and fixed in the cooling groove 21, and the cooling liquid can achieve semi-submerged contact with the battery module 4. , to realize the heating and cooling function of the battery module 4, to ensure that the temperature of the battery module 4 is uniform and in a suitable working temperature range, thereby ensuring the normal output power of the battery module 4, and reducing the risk of thermal abuse of the battery module 4, It is beneficial to realize the thermal management function for the battery module 4 .
  • the battery liquid cold plate assembly in this embodiment can provide a better thermal insulation environment for the battery module 4.
  • the specific heat capacity of the cooling liquid in the liquid cold plate is larger, ⁇ 3000J/kg* K.
  • the liquid cooling plate can absorb a certain amount of heat to cool the battery module 4; when the external temperature is low, the cooling liquid releases energy to provide thermal protection for the battery module 4; Therefore, the performance of the battery module 4 can be prevented from being greatly influenced by the outside world.
  • the cooling groove 21 has a very large heat exchange area, which can realize rapid heat exchange between the cooling liquid and the lower plate 2 of the liquid cooling plate, and improve the cooling efficiency of the entire system.
  • the cooling liquid can achieve semi-submerged cooling for the battery module 4, and the battery module 4 is kept in the cooling liquid immersion environment for a long time.
  • the group 4 is relatively safe. Once thermal runaway occurs, the heat of the battery module 4 will be quickly transferred to the cooling liquid, and the cooling liquid will take away a large amount of heat, delaying the thermal runaway of the battery module 4.
  • the coolant in the battery liquid cold plate assembly is a high-temperature insulating coolant, including high-temperature-resistant non-metallic materials such as silicone oil and new refrigerants.
  • the coolant will isolate different battery modules 4. Avoid high-voltage arcing of the battery caused by insulation failure, effectively delaying the spread of extreme battery thermal runaway.
  • the battery liquid cold plate assembly can effectively enhance the fixed structural strength of the battery module 4. Once the module is thermally out of control, since most of the structure of the battery module 4 is located inside the cooling groove 21, it can effectively resist the impact and impact of the explosion-proof valve. The explosion pressure delays the occurrence of thermal runaway of the battery; at the same time, there is a large space between the battery module 4 and the cooling groove 21, which can effectively divert and release the gas that is thermally out of control of the single cell, and double delay the thermal runaway.
  • the battery liquid cold plate assembly in this embodiment is not limited to be used in the battery module 4, and can also be used in other structures that need to delay thermal runaway or extinguish fire.
  • This embodiment also provides a battery assembly, including the above-mentioned battery liquid cold plate assembly.
  • the battery liquid cold plate assembly is welded with the lower box body of the battery assembly, a separate water pipe is installed on the lower box body, and the flow channel inside the water pipe is communicated with the liquid inlet joint.
  • This embodiment also provides a vehicle including the above battery assembly.

Abstract

本申请提供了一种电池液冷板总成、电池总成及车辆，电池液冷板总成包括液冷板上板、液冷板下板和冷却液接头，液冷板上板和液冷板下板之间形成有冷却流道，液冷板下板上设置有多个冷却凹槽，液冷板上板上对应设置有多个开口，多个开口和多个冷却凹槽一一对应设置，电池模组通过开口部分固定在冷却凹槽中并与液冷板上板密封连接；每个冷却凹槽的槽壁上设置有至少一个流通孔，多个冷却凹槽之间通过流通孔连通；冷却液接头设置在液冷板上板上并与冷却流道连通，位于冷却液接头一侧的冷却凹槽与冷却流道连通。

Description

电池液冷板总成、电池总成及车辆
本申请要求在2021年01月19日提交中国专利局、申请号为202110069203.6的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及电池安全技术领域，例如涉及一种电池液冷板总成、电池总成及车辆。
背景技术
新能源汽车具有能量效率高、零排放、无污染、比能量高、噪音低、可靠性高等特点。动力电池总成作为新能源电池车的主要储能部件，主要保证整车的行驶、制动能量回收、混合动力发动机系统能量调节等功能。电池总成作为电池总成结构保护固定的核心部件，重要性不言而喻。液冷板作为动力电池热管理系统的主要部件，承担着电池的冷却、加热、温度均衡等功能。
相关技术中的液冷板方案并没有实现液冷板的模块化设计，一种产品往往只能应用于一种电池包，重复利用率极低，维修成本比较高。电池液冷板工艺有三种：铝合金钎焊液冷板、挤压口琴液冷板和弯管液冷板。这三种方案都存在制造工艺复杂、生产模具成本高、布置空间要求高、无法实现模块化设计、单块水冷板只能应用于一种电池包等缺点。
发明内容
本申请提供一种电池液冷板总成、电池总成及车辆，制造工艺简单、模具成本低，对布置空间的要求低，可以实现液冷板模块化设计，且可以应用于多种新能源电池包，适用性高。
提供一种电池液冷板总成，包括：
液冷板上板和液冷板下板，所述液冷板上板固连于所述液冷板下板的上方，所述液冷板上板和所述液冷板下板之间形成有冷却流道，所述液冷板下板上设置有多个冷却凹槽，所述液冷板上板上对应所述多个冷却凹槽设置有多个开口，多个开口和所述多个冷却凹槽一一对应设置，电池模组通过所述开口部分固定在所述冷却凹槽中并与所述液冷板上板密封连接；每个冷却凹槽的槽壁上设置有至少一个流通孔，所述多个冷却凹槽之间通过所述流通孔连通；
冷却液接头，设置在所述液冷板上板上并与所述冷却流道连通，位于所述 冷却液接头一侧的冷却凹槽与所述冷却流道连通，冷却液在所述冷却流道和所述冷却凹槽中流通。
所述液冷板下板可以包括：
下板本体，所述下板本体上设置有所述多个冷却凹槽；
电池模组固定凸台，凸设于所述多个冷却凹槽的槽底，设置为固定所述电池模组。
所述电池模组可以粘接于所述电池模组固定凸台上。
所述液冷板下板还可以包括：
至少一根横梁和至少一根纵梁，所述至少一根横梁和所述至少一根纵梁交叉设置形成所述多个冷却凹槽。
所述电池模组与所述液冷板上板之间可以采用密封胶粘接固定。
所述冷却液接头可以包括进液接头和出液接头，所述冷却流道可以包括进液流道和出液流道，所述进液接头与所述进液流道相连通，所述出液接头与所述出液流道相连通。
每个冷却凹槽可以呈矩形，所述多个冷却凹槽可以呈矩形阵列分布于所述液冷板下板上。
所述冷却液可以为耐高温绝缘冷却液。
还提供了一种电池总成，包括如上任一技术方案所述的电池液冷板总成。
还提供了一种车辆，包括如上所述的电池总成。
附图说明
图1是本申请实施方式提供的电池液冷板总成的结构示意图；
图2是本申请实施方式提供的电池液冷板总成与电池模组装配的结构示意图；
图3是本申请实施方式提供的液冷板下板的结构示意图；
图4是本申请实施方式提供的液冷板下板与电池模组装配的结构示意图。
图中：
1、液冷板上板；11、开口；
2、液冷板下板；21、冷却凹槽；22、流通孔；23、下板本体；24、电池模 组固定凸台；25、横梁；26、纵梁；
3、冷却液接头；4、电池模组。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述，所描述的实施例是本申请一部分实施例，而不是全部的实施例。通常在此处附图中描述和示出的本申请实施例的组件可以以多种不同的配置来布置和设计。
因此，以下对在附图中提供的本申请的实施例的描述并非旨在限制要求保护的本申请的范围，而是仅仅表示本申请的选定实施例。
相似的标号和字母在下面的附图中表示类似项，因此，一旦一项在一个附图中被定义，则在随后的附图中不需要对该项进行定义和解释。
在本申请的描述中，术语“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”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，或者是该申请产品使用时惯常摆放的方位或位置关系，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”、“第三”等仅用于区分描述，而不能理解为指示或暗示相对重要性。在本申请的描述中，除非另有说明，“多个”的含义是两个或两个以上。
在本申请的描述中，除非另有规定和限定，术语“设置”、“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。可以根据实际情况理解上述术语在本申请中的含义。
在本申请中，除非另有规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一特征和第二特征直接接触，也可以包括第一特征和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
下面描述本申请的实施例，实施例的示例在附图中示出，其中自始至终相 同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本申请，而不能理解为对本申请的限制。
本实施例提供了一种电池液冷板总成，如图1至图4所示，该电池液冷板总成可以包括液冷板上板1、液冷板下板2和冷却液接头3，其中，液冷板上板1固连于液冷板下板2的上方，液冷板上板1和液冷板下板2之间形成有冷却流道，液冷板下板2上设置有多个冷却凹槽21，液冷板上板1上对应多个冷却凹槽21设置有多个开口11，多个开口11和多个冷却凹槽21一一对应设置，电池模组4通过开口11部分固定在冷却凹槽21中并与液冷板上板1密封连接；每个冷却凹槽21的槽壁上设置有至少一个流通孔22，多个冷却凹槽21之间通过流通孔22连通。冷却液接头3设置在液冷板上板1上并与冷却流道连通，位于冷却液接头3一侧的冷却凹槽21与冷却流道连通，冷却液在冷却流道和冷却凹槽21中流通，其中，所有的冷却凹槽21内部都是连通的，可以形成流道。其中，一个电池模组4可以对应一个冷却凹槽21。
本实施例提供的液冷板总成采用半开口式的冷却凹槽21设计，实现了冷却液对电池模组4的半浸没式冷却，提升产品的工作效率，可以有效对电池模组4实现热管理功能，且电池模组4长期处于冷却液浸泡环境中，电池模组4比较安全，一旦发生热失控，电池模组4的热量会快速传递到冷却液中，冷却液带走大量热量，延缓电池模组4热失控；冷却凹槽21对电池模组4具有固定和限位作用，省去了其他固定结构且可以限制电池模组4的膨胀变形。本实施例提供的液冷板总成制造工艺简单、模具成本低，空间利用率高，对布置空间的要求低，可以实现液冷板模块化设计，且通过多块液冷板总成的组合安装可以应用于纯电动汽车(Electric Vehicle，EV)、插电式混合动力汽车(Plug-in Hybrid Electric Vehicle，PHEV)、混合动力汽车(Hybrid Electric Vehicle，HEV)等多种新能源电池包，适用性高，维修成本低，实现多种电池产品共用同一种液冷板总成的目的，具备缩短研发周期与降低研发成本的效果。
液冷板下板2是一种冲压铝型材结构，但不同于普通的液冷板，如图3所示，液冷板下板2还包括下板本体23、电池模组固定凸台24、至少一根横梁25和至少一根纵梁26。至少一根横梁25和至少一根纵梁26设置于下板本体23上并交叉设置形成多个冷却凹槽21；电池模组固定凸台24凸设于冷却凹槽21的槽底，设置为固定电池模组4；下板本体23上设置有所述多个冷却凹槽21。且电池模组4与电池模组固定凸台24相接触，提高了电池模组4与液冷板下板2的冷热交换效率，即提高了电池模组4的散热效率。
电池模组4粘接于电池模组固定凸台24上。电池模组4与液冷板上板1之 间采用密封胶粘接固定。电池模组4通过这两种方式固定时不需要固定螺栓等结构，可以提高电池总成的安装固定强度，保证电池模组4的平稳连接。
可选地，冷却液接头3包括进液接头和出液接头，冷却流道包括进液流道和出液流道，进液接头与进液流道相连通，出液接头与出液流道相连通。由于位于冷却液接头3一侧的冷却凹槽21与冷却流道连通，因此，冷却液自进液接头流入进液流道后流入与进液流道最近的一个冷却凹槽21中，然后通过流通孔22流至多个冷却凹槽21中均匀布液，对置于冷却凹槽21中的电池模组4进行热管理。当需要更换冷却液时，冷却液可经出液流道流出出液接头。进液接头和出液接头上均设置有阀门，可控制接头的通断。
本实施例中液冷板上板1和液冷板下板2均呈矩形，冷却凹槽21同样呈矩形，且多个冷却凹槽21呈矩形阵列分布于液冷板下板2上。多个冷却凹槽21均匀分布于液冷板下板2上，有利于冷却液均匀分布于多个冷却凹槽21中，保证多个电池模组4的热管理效果。可选地，本实施例中的液冷板上板1和液冷板下板2通过钎焊固定，包含冲压铝板、吹胀铝板等。
本实施例中的电池模组4包括长方体形式的电池单体，电池模组4的防爆阀分别位于电池单体的两端。矩形的冷却凹槽21可以对电池模组4实现限位与固定，无需X和Y方向上的其他固定结构，节约制造成本。电池模组4在进行充放电后会发生膨胀，电池模组4固定在半开口的冷却凹槽21内部，冷却凹槽21可以限制电池模组4的膨胀变形。可选地，本实施例中的电池模组4是一种底部经过绝缘处理、防护等级达到防护安全级别(Ingress Protection Rating，IP67)的特制电池模组4。
本实施例提供的电池液冷板总成一方面可以有效对电池模组4实现热管理功能，另一方面可以有效延缓电池模组4热失控。
第一方面，该电池液冷板总成采用半开口式的冷却凹槽21设计，电池模组4直接粘接固定在冷却凹槽21中，冷却液可以对电池模组4实现半浸没式接触，实现对电池模组4的加热与冷却功能，保证电池模组4温度均匀且处于适宜的工作温度区间，从而保证电池模组4的正常输出功率，减少电池模组4发生热滥用的风险，有利于对电池模组4实现热管理功能。
本实施例中的电池液冷板总成可以为电池模组4提供较好的保温环境，当电池热管理系统不工作时，液冷板中的冷却液比热容较大，为≥3000J/kg*K。当外界温度较高，电池生热时，液冷板可以吸收一定的热量，实现电池模组4的冷却；当外界温度较低时，冷却液降温释放能量可以为电池模组4提供保温保护；因此可以防止电池模组4受到外界较大的影响而性能不稳定。
冷却凹槽21具有非常大的换热面积，可以实现冷却液与液冷板下板2的快速换热，提升整个系统的冷却效率。
第二方面，由于电池液冷板总成采用半开口式的冷却凹槽21设计，冷却液可以对电池模组4实现半浸没式冷却，电池模组4长期处于冷却液浸泡环境中，电池模组4比较安全，一旦发生热失控，电池模组4的热量会快速传递到冷却液中，冷却液带走大量热量，延缓电池模组4热失控。
电池液冷板总成中的冷却液选用耐高温绝缘冷却液，包括硅油、新型制冷剂等耐高温非金属材料，当电池模组4发生热失控时，冷却液会隔绝不同电池模组4，避免因为绝缘失效造成的电池高电压拉弧现象，有效延缓极端电池热失控的蔓延。
电池液冷板总成可以有效增强电池模组4固定的结构强度，一旦模组发生热失控，由于电池模组4大部分结构都位于冷却凹槽21的内部，可以有效抵御防爆阀的冲击与爆炸压力，延缓电池热失控的发生；同时，电池模组4与冷却凹槽21之间具有较大空间，能对单体热失控的气体进行有效地导流与泄压，双重延缓热失控。
本实施例中的电池液冷板总成不限用于电池模组4，也可以用于其他需要延缓热失控或灭火的结构。
本实施例还提供一种电池总成，包括上述的电池液冷板总成。电池液冷板总成与电池总成的下箱体焊接在一起，下箱体上安装有单独的水管，水管内部的流道与进液接头相连通。
本实施例还提供一种车辆，包括如上的电池总成。

Claims (10)

  1. 一种电池液冷板总成，包括：
    液冷板上板(1)和液冷板下板(2)，所述液冷板上板(1)固连于所述液冷板下板(2)的上方，所述液冷板上板(1)和所述液冷板下板(2)之间形成有冷却流道，所述液冷板下板(2)上设置有多个冷却凹槽(21)，所述液冷板上板(1)上对应所述多个冷却凹槽(21)设置有多个开口，所述多个开口和所述多个冷却凹槽(21)一一对应设置，电池模组(4)通过所述开口部分固定在所述冷却凹槽(21)中并与所述液冷板上板(1)密封连接；每个冷却凹槽(21)的槽壁上设置有至少一个流通孔(22)，所述多个冷却凹槽(21)之间通过所述流通孔(22)连通；
    冷却液接头(3)，设置在所述液冷板上板(1)上并与所述冷却流道连通，位于所述冷却液接头(3)一侧的冷却凹槽(21)与所述冷却流道连通，冷却液在所述冷却流道和所述冷却凹槽(21)中流通。
  2. 根据权利要求1所述的电池液冷板总成，其中，所述液冷板下板(2)包括：
    下板本体(23)，所述下板本体(23)上设置有所述多个冷却凹槽(21)；
    电池模组固定凸台(24)，凸设于所述多个冷却凹槽(21)的槽底，设置为固定所述电池模组(4)。
  3. 根据权利要求2所述的电池液冷板总成，其中，
    所述电池模组(4)粘接于所述电池模组固定凸台(24)上。
  4. 根据权利要求1或2所述的电池液冷板总成，其中，所述液冷板下板(2)还包括：
    至少一根横梁(25)和至少一根纵梁(26)，所述至少一根横梁(25)和所述至少一根纵梁(26)交叉设置形成所述多个冷却凹槽(21)。
  5. 根据权利要求1所述的电池液冷板总成，其中，
    所述电池模组(4)与所述液冷板上板(1)之间采用密封胶粘接固定。
  6. 根据权利要求1所述的电池液冷板总成，其中，
    所述冷却液接头(3)包括进液接头和出液接头，所述冷却流道包括进液流道和出液流道，所述进液接头与所述进液流道相连通，所述出液接头与所述出液流道相连通。
  7. 根据权利要求1所述的电池液冷板总成，其中，
    每个冷却凹槽(21)呈矩形，所述多个冷却凹槽(21)呈矩形阵列分布于 所述液冷板下板(2)上。
  8. 根据权利要求1所述的电池液冷板总成，其中，
    所述冷却液为耐高温绝缘冷却液。
  9. 一种电池总成，包括如权利要求1-8中任一项所述的电池液冷板总成。
  10. 一种车辆，包括如权利要求9所述的电池总成。
PCT/CN2021/135935 2021-01-19 2021-12-07 电池液冷板总成、电池总成及车辆 WO2022156400A1 (zh)

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