Liquid cooling assembly, battery pack and energy storage device

Abstract

The embodiment of the utility model provides a liquid cooling assembly and an energy storage device. The liquid cooling assembly comprises a bottom cooling plate, a plurality of side cooling plates, a first pipeline and a second pipeline. The bottom cooling plate is used for being arranged on the bottom sides of the multiple battery modules, the multiple side cooling plates are arranged on the bottom cooling plate at intervals, and a space used for installing the battery modules is formed between every two adjacent side cooling plates. The first end of the bottom cooling plate is provided with a liquid distribution port and a liquid return port, and the side cooling plate is provided with a liquid inlet and a liquid outlet. The liquid distribution opening is connected with the liquid inlets in the multiple side cold plates through a first pipeline at the same time, and the liquid return opening is connected with the liquid outlets in the multiple side cold plates through a second pipeline at the same time, so that cooling liquid in the bottom cold plate can flow back into the bottom cold plate after flowing through the multiple side cold plates. According to the liquid cooling assembly and the energy storage device, the cooling liquid can absorb more heat, and the heat exchange efficiency is higher.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of energy storage, and specifically to a liquid cooling assembly, a battery pack, and an energy storage device. Background Art

[0002] With the continuous development of new energy technologies, energy storage devices are becoming more widely used, and their energy density is also increasing. However, energy storage devices generate a large amount of heat during the charging and discharging process. If this heat cannot be dissipated promptly and effectively, the internal temperature of the energy storage device will rise, affecting the performance, lifespan, and even safety of the energy storage components.

[0003] Current energy storage devices typically use liquid cooling technology to dissipate heat. Specifically, a liquid cooling assembly is installed in conjunction with the battery pack within the energy storage device. This assembly contains channels for coolant flow, which exchanges heat with the energy storage device, dissipating heat.

[0004] However, existing liquid cooling technology uses a single coolant flow path, resulting in a small heat exchange area between the liquid cooling assembly and the battery pack. Consequently, the coolant absorbs only a limited amount of heat as it passes by the battery pack, resulting in low coolant utilization. Therefore, improving coolant utilization remains a pressing technical challenge. Utility Model Content

[0005] In view of the above problems, an embodiment of the present application provides a liquid cooling assembly that simultaneously exchanges heat for the battery module through a bottom cold plate and multiple side cold plates. A loop is formed between the bottom cold plate and the multiple side cold plates through a first pipe and a second pipe, allowing the coolant to flow from the bottom cold plate through the multiple side cold plates and then return to the bottom cold plate. This allows the coolant to absorb more heat, improves the utilization rate of the coolant, and makes the heat exchange efficiency of the liquid cooling assembly higher. An embodiment of the present application also provides a battery pack and energy storage device including such a liquid cooling assembly.

[0006] One aspect of an embodiment of the present application provides a liquid cooling assembly, which includes a bottom cold plate, multiple side cold plates, a first pipe, and a second pipe. The bottom cold plate is used to be arranged on the bottom side of multiple battery modules, and multiple side cold plates are arranged at intervals on the bottom cold plate, and a space for installing battery modules is formed between two adjacent side cold plates. A liquid distribution port and a liquid return port are provided at the first end of the bottom cold plate, and a liquid inlet and a liquid outlet are provided on the side cold plate. The liquid distribution port is connected to the liquid inlets on the multiple side cold plates at the same time through the first pipe, and the liquid return port is connected to the liquid outlets on the multiple side cold plates at the same time through the second pipe, so that the coolant in the bottom cold plate can flow through the multiple side cold plates and then flow back to the bottom cold plate.

[0007] This type of liquid cooling component increases the flow distance of the coolant next to the battery module, allowing the coolant to absorb more heat, improving the utilization rate of the coolant, and the heat exchange efficiency of the liquid cooling component is higher.

[0008] In an optional manner, the liquid distribution port and the liquid return port are arranged on a first side surface of the bottom cold plate, and the first side surface faces the side cold plate.

[0009] In this manner, the liquid distribution port and the liquid return port are closer to the side cold plate, and the first pipe and the second pipe are more convenient to connect.

[0010] In an optional manner, the first pipe and the second pipe are located on the same side of the cold plate on each side.

[0011] In this manner, the layout of the first pipeline and the second pipeline is more regular, and is easier to operate during installation, and the overall structure of the liquid cooling assembly is more compact.

[0012] In an optional embodiment, the first pipeline includes a liquid distribution main pipe and a plurality of liquid distribution branch pipes. The liquid distribution main pipe is connected to the liquid distribution port, and the liquid distribution main pipe is connected to the liquid inlets of the plurality of side cold plates through the plurality of liquid distribution branch pipes.

[0013] In this type of first pipeline, each pipeline is easy to replace, easy to install and maintain, and it is convenient to add more side cooling plates, which has better flexibility and scalability.

[0014] In an optional embodiment, the second pipeline includes a liquid return main pipe and a plurality of liquid return branch pipes. The liquid return main pipe is connected to the liquid return port, and the liquid return main pipe is connected to the liquid outlets of the plurality of side cold plates through the plurality of liquid return branch pipes.

[0015] In this type of second pipeline, each pipeline is also easy to replace, easy to install and maintain, and it is convenient to add more side cooling plates, which has better flexibility and scalability.

[0016] In one optional embodiment, the liquid cooling assembly further includes an inlet and a drain pipe. The second end of the bottom cold plate is provided with an inlet and a drain port, with the second end of the bottom cold plate and the first end of the bottom cold plate forming opposing ends of the bottom cold plate. The inlet is connected to the inlet pipe, and the drain port is connected to the drain pipe.

[0017] In this method, the injection pipe and the discharge pipe are connected to one end of the bottom cold plate, and the first pipe and the second pipe are connected to the other end of the bottom cold plate. The injection pipe and the discharge pipe will not interfere with or collide with the first pipe and the second pipe. The installation process of each pipe is more convenient, and the overall structure is more compact and occupies less space.

[0018] In an optional manner, a two-way stop valve is provided between the liquid injection port and the liquid injection pipe, and / or a two-way stop valve is provided between the liquid discharge port and the liquid discharge pipe.

[0019] When a two-way stop valve is set, the flow state of the coolant in the bottom cold plate and the side cold plate can be controlled simultaneously by the opening and closing state of the valve port of the two-way stop valve, thereby making the flow process of the coolant controllable and enhancing the controllability of the heat dissipation process.

[0020] In one optional embodiment, the liquid inlet pipe is provided with an exhaust valve, and the liquid outlet pipe is provided with a drain valve. When the drain valve is closed and the exhaust valve is open, gas in the liquid cooling assembly can be discharged through the exhaust valve. When both the drain valve and the exhaust valve are open, coolant in the liquid cooling assembly can be discharged through the drain valve.

[0021] In this method, the gas in and out of the liquid cooling component is controlled by the exhaust valve, and the discharge of the coolant in the liquid cooling component is controlled by the drain valve, so that the coolant can be smoothly injected into the liquid cooling component and the coolant in the liquid cooling component can be smoothly discharged, thereby improving the controllability and smoothness of the coolant injection and discharge of the liquid cooling component.

[0022] Another aspect of the present invention provides a battery pack including a battery module and any one of the above-described feasible liquid cooling assemblies, wherein a bottom cold plate in the liquid cooling assembly is disposed on the bottom side of the battery module, and the battery module is located between two adjacent side cold plates.

[0023] In this battery pack, the battery modules dissipate heat simultaneously through a bottom cold plate and multiple side cold plates, achieving enhanced heat dissipation. Furthermore, a loop is formed between the bottom and side cold plates, increasing the coolant's flow path near the battery modules. This allows the coolant to fully absorb the heat generated within the battery pack, resulting in higher coolant utilization and heat exchange efficiency.

[0024] Another aspect of an embodiment of the present application provides an energy storage device, which includes the above-mentioned battery pack.

[0025] In the liquid cooling assembly and energy storage device provided in the embodiments of the present application, the liquid cooling assembly includes a bottom cold plate and multiple side cold plates, and the bottom cold plate and the side cold plates surround the battery module, thereby performing multi-directional heat exchange on the battery module and improving the heat exchange effect. At the same time, the liquid distribution port on the bottom cold plate is connected to the liquid inlets on multiple side cold plates at the same time through a first pipe, and the liquid return port on the bottom cold plate is connected to the liquid outlets on multiple side cold plates at the same time through a second pipe, so that a loop is formed between the bottom cold plate and the side cold plates, which increases the flow distance of the coolant next to the battery module, allowing the coolant to absorb more heat, improving the utilization rate of the coolant, and improving the heat exchange efficiency. In addition, the bottom cold plate and the multiple side cold plates form an overall loop. When injecting coolant, it is only necessary to inject coolant into the bottom cold plate, which makes the refilling of coolant simpler.

[0026] The above description is only an overview of the technical solutions of the embodiments of the present application. In order to more clearly understand the technical means of the embodiments of the present application, they can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0028] Figure 1 This is a schematic structural diagram of a liquid cooling assembly provided in an embodiment of the present application from a first perspective.

[0029] Figure 2 A schematic structural diagram of a liquid cooling assembly provided in an embodiment of the present application from a second perspective.

[0030] Figure 3 This is a schematic structural diagram of a battery pack equipped with a liquid cooling assembly according to an embodiment of the present application.

[0031] Figure 4 This is a partially enlarged schematic diagram of the positions of the first pipe and the second pipe of the liquid cooling assembly involved in an embodiment of the present application.

[0032] Figure 5 This is a first structural schematic diagram of an energy storage device equipped with a liquid cooling assembly according to an embodiment of the present application, viewed from a first perspective.

[0033] Figure 6 This is a second structural schematic diagram of the energy storage device equipped with a liquid cooling component at a second viewing angle involved in an embodiment of the present application.

[0034] Reference numerals:

[0035] 10. Bottom cold plate; 11. Liquid dispensing port; 12. Liquid return port; 13. Liquid injection port; 14. Liquid drain port;

[0036] 20. Side cold plate;

[0037] 40. First pipeline; 41. Liquid distribution main pipe; 42. Liquid distribution branch pipe;

[0038] 50, second pipeline; 51, liquid return main pipe; 52, liquid return branch pipe;

[0039] 60. Battery module; 70. Liquid filling pipe; 80. Liquid discharge pipe; 90. Two-way stop valve; 91. Exhaust valve; 92. Liquid discharge valve. DETAILED DESCRIPTION

[0040] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0042] The terms "comprises", "comprising" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover but not exclude other contents. The word "a" or "an" does not exclude the presence of a plurality.

[0043] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it necessarily refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0044] The term "and / or" in this document simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0045] The directional words appearing in the following description are all directions shown in the drawings and do not limit the specific structure of the liquid cooling assembly and energy storage device of the present application. For example, in the description of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present application.

[0046] In addition, the expressions of the indicated directions, such as the X direction, the Y direction, and the Z direction, used to illustrate the operation and construction of the components of the liquid cooling assembly and the energy storage device of this embodiment are not absolute but relative, and although these indications are appropriate when the components of the liquid cooling assembly and the energy storage device are in the positions shown in the figures, when these positions change, these directions should be interpreted differently to correspond to the changes.

[0047] In addition, the terms "first", "second", etc. in the description and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order, and may explicitly or implicitly include one or more such features.

[0048] In the description of this application, unless otherwise specified, "plurality" means more than two (including two), and similarly, "multiple groups" means more than two (including two).

[0049] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood broadly. For example, "connected" or "connected" in a mechanical structure can refer to a physical connection. For example, a physical connection can be a fixed connection, such as a fixed connection via a fixing member, such as a screw, bolt, or other fixing member. A physical connection can also be a detachable connection, such as a mutual snap-fit ​​connection. A physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. In addition to referring to a physical connection, "connected" or "connected" in a circuit structure can also refer to an electrical connection or a signal connection. For example, it can be a direct connection, i.e., a physical connection, or an indirect connection through at least one intermediate element, as long as the circuit is interconnected. It can also refer to internal communication between two elements. A signal connection can refer to a signal connection through a circuit or a signal connection through a media medium, such as radio waves. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0050] The liquid cooling assembly provided in this application is applied to an energy storage device. The structure of the liquid cooling assembly is as follows: Figure 1 、 Figure 2 and Figure 3 As shown, Figure 1 This is a schematic structural diagram of a liquid cooling assembly provided in an embodiment of the present application from a first perspective. Figure 2 This is a schematic structural diagram of a liquid cooling assembly provided in an embodiment of the present application from a second perspective. Figure 3 The figure is a schematic structural diagram of a battery pack having a liquid cooling assembly installed in an embodiment of the present application, wherein the liquid cooling assembly includes a bottom cold plate 10, a plurality of side cold plates 20, a first pipe 40, and a second pipe 50.

[0051] The bottom cold plate 10 and the side cold plate 20 are both liquid-cooled plates, serving as heat exchange points within the liquid-cooled assembly. They are plate-shaped structures, each with internal channels for coolant circulation.

[0052] like Figure 3 As shown, a bottom cold plate 10 is positioned on the bottom side of multiple battery modules 60. Multiple side cold plates 20 are spaced apart on the bottom cold plate 10, with spaces formed between adjacent side cold plates 20 for mounting the battery modules 60. When the battery modules 60 are positioned between the bottom cold plate 10 and the two side cold plates 20, heat can be exchanged from multiple directions simultaneously, improving heat dissipation.

[0053] Both the bottom cold plate 10 and the side cold plates 20 can be configured as square, circular, or oval plates, depending on the requirements. The shape and size of the bottom cold plate 10 correspond to the bottom surfaces of the battery modules 60 , while the shape and size of the side cold plates 20 correspond to the side surfaces of the battery modules 60 that the side cold plates 20 face.

[0054] like Figure 1 As shown, a liquid distribution port 11 and a liquid return port 12 are provided at the first end of the bottom cold plate 10. The liquid distribution port 11 is a coolant outlet on the bottom cold plate 10, used to distribute the coolant in the bottom cold plate 10 to each side cold plate 20. The liquid return port 12 is a coolant inlet on the bottom cold plate 10, used to recover the coolant in each side cold plate 20.

[0055] The liquid distribution port 11 and the liquid return port 12 can be provided on any side of the first end of the bottom cold plate 10. A specific embodiment can be as follows: Figure 2 As shown, the liquid dispensing port 11 and the liquid return port 12 are disposed on the first side surface of the bottom cold plate 10, with the first side surface facing the side cold plate 20. This places the liquid dispensing port 11 and the liquid return port 12 closer to the side cold plate 20, thereby facilitating connection between the first pipe 40 and the second pipe 50. Furthermore, the liquid dispensing port 11 and the liquid return port 12 may also be disposed on other surfaces, without limitation herein.

[0056] The side cold plate 20 is provided with a liquid inlet and a liquid outlet. The liquid inlet is used to receive the coolant from the bottom cold plate 10 , and the liquid outlet is used to discharge the coolant in the side cold plate 20 .

[0057] The liquid distribution port 11 is connected to the liquid inlets on multiple side cold plates 20 at the same time through the first pipe 40, and the liquid return port 12 is connected to the liquid outlets on multiple side cold plates 20 at the same time through the second pipe 50, so that the coolant in the bottom cold plate 10 can flow through the multiple side cold plates 20 and then flow back to the bottom cold plate 10.

[0058] That is, the first pipe 40 is connected to the liquid distribution port 11 and the liquid inlet on each side cold plate 20 at the same time, so that the coolant in the bottom cold plate 10 can enter each side cold plate 20 at the same time through the first pipe 40 .

[0059] The second pipe 50 is connected to the liquid return port 12 and the liquid outlets on each side cold plate 20 at the same time, so that the coolant flowing out of each side cold plate 20 is collected in the second pipe 50 and flows back to the bottom cold plate 10 from the second pipe 50.

[0060] The first pipe 40 and the second pipe 50 enable the bottom cold plate 10 and the side cold plates 20 to form a loop for the flow of coolant. That is, the coolant can first flow from the bottom cold plate 10 into each side cold plate 20 at the same time, and then flow back to the bottom cold plate 10 from each side cold plate 20. This increases the flow distance of the coolant next to the battery module 60, allowing the coolant to absorb more heat, thereby improving the utilization rate of the coolant and the heat exchange efficiency of the liquid cooling component.

[0061] In this embodiment, the coolant in the side cold plates 20 comes from the bottom cold plate 10. In a feasible implementation, the coolant capacity of the bottom cold plate 10 can be greater than or equal to the sum of the coolant capacities of the side cold plates 20, so that the coolant in the bottom cold plate 10 can fill all the side cold plates 20, so that each side cold plate 20 has a sufficient amount of coolant, thereby improving the heat exchange capacity of the side cold plates 20.

[0062] In this embodiment, there are many ways to position the first pipe 40 and the second pipe 50. In a specific embodiment, the first pipe 40 and the second pipe 50 can be located on the same side of the cold plate 20 on each side.

[0063] For example, the liquid inlet and the liquid outlet of each side cold plate 20 may be arranged on the same side, so that the connected first pipe 40 and the second pipe 50 are both located on the same side of each side cold plate 20 .

[0064] In this manner, the first pipe 40 and the second pipe 50 are both located on the same side of the cold plate 20 on each side. The layout of the first pipe 40 and the second pipe 50 is more regular, and is easier to operate during installation. The overall structure of the liquid cooling assembly is also more compact.

[0065] In this embodiment, there are many ways to set up the structures of the first pipe 40 and the second pipe 50. For example, the first pipe 40 and the second pipe 50 can be set as a separate three-way pipe, or the first pipe 40 and the second pipe 50 can be composed of multiple pipes to evenly transport the coolant.

[0066] Taking the first pipeline 40 as an example, a feasible implementation method is as follows Figure 4 As shown, Figure 4 This is a partially enlarged schematic diagram of the locations of the first and second pipes of the liquid cooling assembly according to an embodiment of the present application. The first pipe 40 includes a main liquid distribution pipe 41 and multiple branch liquid distribution pipes 42. The main liquid distribution pipe 41 is connected to the liquid distribution port 11, and the main liquid distribution pipe 41 is connected to the liquid inlets of the multiple side cold plates 20 through the branch liquid distribution pipes 42.

[0067] In this configuration, the main liquid distribution pipe 41 is connected to the liquid distribution port 11, allowing the coolant flowing out of the bottom cold plate 10 to flow into the main liquid distribution pipe 41 first. A branch liquid distribution pipe 42 is connected to the main liquid distribution pipe 41 at one end and to the liquid inlet of the side cold plate 20 at the other end, allowing the liquid distribution port 11 to connect to the liquid inlets of multiple side cold plates 20 simultaneously.

[0068] In this type of first pipeline 40, each pipeline is easy to replace, easy to install and maintain, and it is convenient to add more side cooling plates, which has better flexibility and scalability.

[0069] In a more specific embodiment, multiple side cold plates 20 can be arranged parallel to each other, and multiple liquid distribution pipes 42 used to connect the liquid distribution main pipe 41 and different side cold plates 20 can also be arranged parallel to each other, so that the coolant in the multiple side cold plates 20 can flow at a similar flow rate and flow rate, which is conducive to the uniform distribution of the coolant and improves the heat dissipation uniformity of the battery module 60.

[0070] The configuration of the second pipe 50 may be similar to that of the first pipe 40 , and the configuration of the second pipe 50 may be the same as or different from that of the first pipe 40 .

[0071] For example, a possible implementation is as follows Figure 4 As shown, the second pipeline 50 includes a liquid return main pipe 51 and multiple liquid return branch pipes 52. The liquid return main pipe 51 is connected to the liquid return port 12, and the liquid return main pipe 51 is connected to the liquid outlets of multiple side cold plates 20 through the multiple liquid return branch pipes 52.

[0072] In this type of second pipeline 50, each pipeline is also easy to replace, easy to install and maintain, and convenient to add more side cooling plates, which has better flexibility and scalability.

[0073] In this embodiment, since a loop is formed between the bottom cold plate 10 and the side cold plate 20, only the following steps are required: Figure 1 As shown, a liquid injection port 13 and a liquid discharge port 14 are provided on the bottom cold plate 10 , and coolant is injected through the liquid injection port 13 and discharged through the liquid discharge port 14 , so that the coolant in the bottom cold plate 10 and the side cold plate 20 can be managed uniformly.

[0074] The liquid inlet 13 and the liquid drain port 14 can be located at the same end of the bottom cold plate 10, or at different ends. Furthermore, the liquid inlet 13 and the liquid drain port 14 can be located at the first end of the bottom cold plate 10, that is, the liquid inlet 13, the liquid drain port 14, the liquid distribution port 11, and the liquid return port 12 are all located at the first end. Alternatively, the liquid inlet 13 and the liquid drain port 14 can be located at the other end of the bottom cold plate 10, opposite the first end.

[0075] For example, a specific embodiment is as follows Figure 1 、 Figure 5 and Figure 6 As shown, Figure 5 This is a first structural schematic diagram of an energy storage device with a liquid cooling assembly installed at a first viewing angle according to an embodiment of the present application. Figure 6 This is a second structural schematic diagram of the energy storage device equipped with a liquid cooling component at a second viewing angle involved in an embodiment of the present application.

[0076] The liquid cooling assembly further includes an injection pipe 70 and a discharge pipe 80. An injection port 13 and a discharge port 14 are provided at the second end of the bottom cold plate 10. The second end of the bottom cold plate 10 and the first end of the bottom cold plate 10 are opposite ends of the bottom cold plate 10. The injection port 13 is connected to the injection pipe 70, and the discharge port 14 is connected to the discharge pipe 80.

[0077] In this method, the injection pipe 70 and the discharge pipe 80 are connected to one end of the bottom cold plate 10, and the first pipe 40 and the second pipe 50 are connected to the other end of the bottom cold plate 10. The injection pipe 70 and the discharge pipe 80 will not interfere with or collide with the first pipe 40 and the second pipe 50. The installation process of each pipe is more convenient, and the overall structure is more compact and occupies less space.

[0078] In addition, in order to facilitate the control of the injection and discharge process of the coolant, you can Figure 5 As shown, a two-way shut-off valve 90 is provided between the liquid injection port 13 and the liquid injection pipe 70, and / or a two-way shut-off valve 90 is provided between the liquid discharge port 14 and the liquid discharge pipe 80. When the two-way shut-off valve 90 is provided, the flow state of the coolant in the bottom cold plate 10 and the side cold plate 20 can be controlled simultaneously by the opening and closing state of the valve port of the two-way shut-off valve 90, thereby making the flow process of the coolant controllable and enhancing the controllability of the heat dissipation process.

[0079] In another embodiment, an exhaust valve 91 can be provided in the liquid cooling assembly so that when coolant is injected into the liquid cooling assembly, the exhaust valve 91 opens to exhaust excess gas from the liquid cooling assembly. The exhaust valve 91 can be provided at the highest point of the liquid cooling assembly or at other locations.

[0080] Furthermore, a drain valve 92 may be provided in the liquid cooling assembly to drain the coolant in the liquid cooling assembly through the drain valve 92, so as to facilitate disassembly and maintenance of the battery module. The drain valve 92 may be provided at a lower position to facilitate the draining of the coolant.

[0081] A specific implementation method is as follows Figure 5 As shown, an exhaust valve 91 is provided on the liquid injection pipe 70, and a drain valve 92 is provided on the liquid discharge pipe 80. When the drain valve 92 is closed and the exhaust valve 91 is opened, the gas in the liquid cooling assembly can be discharged through the exhaust valve 91. When both the drain valve 92 and the exhaust valve 91 are opened, the coolant in the liquid cooling assembly can be discharged through the drain valve 92.

[0082] During the specific filling and draining processes, when coolant is injected into the liquid-cooling assembly, the coolant will occupy space within the assembly. At this point, it is necessary to open exhaust valve 91 to allow air to escape smoothly, allowing the coolant to be smoothly injected into the assembly. When the coolant in the assembly needs to be drained, if only drain valve 92 is opened, negative pressure will occur within the assembly, preventing the coolant from draining properly. Therefore, both exhaust valve 91 and drain valve 92 must be opened simultaneously to allow the coolant to drain smoothly.

[0083] In this method, the gas in and out of the liquid cooling component is controlled by the exhaust valve 91, and the discharge of the coolant in the liquid cooling component is controlled by the drain valve 92, so that the coolant can be smoothly injected into the liquid cooling component and the coolant in the liquid cooling component can be smoothly discharged, thereby improving the controllability and smoothness of the coolant injection and discharge of the liquid cooling component.

[0084] In addition, in this embodiment, the connection method between each pipe, and the connection method between each pipe and each interface can be welding, threaded connection, clamping, etc., which is not limited here.

[0085] The first embodiment above describes the liquid cooling assembly in detail. The second embodiment below describes a battery pack. Figure 3 As shown, it includes a battery module 60 and the liquid cooling assembly of the first embodiment. The bottom cold plate 10 in the liquid cooling assembly is arranged on the bottom side of the battery module 60, and the battery module 60 is located between two adjacent side cold plates 20.

[0086] The specific structure of the liquid cooling assembly in this battery pack corresponds to the liquid cooling assembly in the first embodiment. For the specific structural setting method, please refer to the relevant introduction of the liquid cooling assembly in the first embodiment. The similarities will not be described in detail in this embodiment.

[0087] In this battery pack, the battery modules 60 dissipate heat simultaneously through the bottom cold plate 10 and multiple side cold plates 20, achieving enhanced heat dissipation. Furthermore, a loop is formed between the bottom cold plate 10 and the side cold plates 20, increasing the coolant flow distance around the battery modules 60. This allows the coolant to fully absorb the heat generated within the battery pack, resulting in higher coolant utilization and heat exchange efficiency.

[0088] In addition, an embodiment of the present application further provides an energy storage device including the above-mentioned battery pack. The energy storage device may be an energy storage cabinet for accommodating multiple battery packs, or a battery pack provided with multiple battery packs, or other energy storage devices.

[0089] The energy storage device provided in this embodiment is as follows Figure 5 and Figure 6As shown, the battery pack in the energy storage device includes a battery module 60 and any feasible liquid cooling assembly provided in the first embodiment described above. The bottom cold plate 10 in the liquid cooling assembly is disposed on the bottom side of the battery module 60, and the battery module 60 is located between two adjacent side cold plates 20. Furthermore, the energy storage device can be equipped with multiple battery packs. Coolant can be simultaneously injected into the bottom cold plate 10 of each battery pack through the liquid injection pipe 70, and the coolant in each battery pack can also be recovered simultaneously through the liquid discharge pipe 80.

[0090] In this energy storage device, the battery module 60 dissipates heat simultaneously through the bottom cold plate 10 and the side cold plates 20, achieving enhanced heat dissipation. Furthermore, a loop is formed between the bottom cold plate 10 and the side cold plates 20, increasing the coolant's flow path around the battery module 60. This allows the coolant to fully absorb the heat generated by the battery module 60, resulting in higher coolant utilization and heat exchange efficiency.

[0091] In summary, in the liquid cooling assembly and energy storage device described above, the liquid cooling assembly includes a bottom cold plate and multiple side cold plates. The bottom cold plate and the side cold plates surround the battery module, thereby performing multi-directional heat exchange on the battery module and improving the heat exchange effect. At the same time, the liquid distribution port on the bottom cold plate is connected to the liquid inlets on multiple side cold plates at the same time through a first pipe, and the liquid return port on the bottom cold plate is connected to the liquid outlets on multiple side cold plates at the same time through a second pipe, so that a loop is formed between the bottom cold plate and the side cold plates, which increases the flow distance of the coolant next to the battery module, allowing the coolant to absorb more heat, improving the utilization rate of the coolant, and improving the heat exchange efficiency. In addition, the bottom cold plate and the multiple side cold plates form an overall loop. When injecting coolant, it is only necessary to inject coolant into the bottom cold plate, which makes the refilling of coolant simpler.

[0092] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are intended to be within the scope of this application and to form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0093] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A liquid cooling component, characterized in that: The liquid cooling assembly includes: a bottom cold plate, a plurality of side cold plates, a first pipe and a second pipe; The bottom cold plate is used to be arranged on the bottom side of multiple battery modules, and multiple side cold plates are arranged at intervals on the bottom cold plate, and a space for installing battery modules is formed between two adjacent side cold plates; The first end of the bottom cold plate is provided with a liquid distribution port and a liquid return port, and the side cold plate is provided with a liquid inlet and a liquid outlet; The liquid distribution port is connected to the liquid inlets on the multiple side cold plates through the first pipe, and the liquid return port is connected to the liquid outlets on the multiple side cold plates through the second pipe, so that the coolant in the bottom cold plate can flow through the multiple side cold plates and then flow back to the bottom cold plate.

2. The liquid cooling assembly according to claim 1, wherein: The liquid distribution port and the liquid return port are arranged on a first side surface of the bottom cold plate, and the first side surface faces the side cold plate.

3. The liquid cooling assembly according to claim 1, wherein: The first pipe and the second pipe are located on the same side of each side cold plate.

4. The liquid cooling assembly according to claim 1, wherein: The first pipeline includes: a liquid distribution main pipe and a plurality of liquid distribution branch pipes; The liquid distribution main pipe is communicated with the liquid distribution port, and the liquid distribution main pipe is communicated with the liquid inlets of the plurality of side cold plates through the plurality of liquid distribution branch pipes.

5. The liquid cooling assembly according to claim 1, wherein: The second pipeline includes: a liquid return main pipe and a plurality of liquid return branch pipes; The liquid return main pipe is communicated with the liquid return port, and the liquid return main pipe is communicated with the liquid outlets of the plurality of side cold plates through the plurality of liquid return branch pipes.

6. The liquid cooling assembly according to claim 1, wherein: The liquid cooling assembly also includes a liquid injection pipe and a liquid discharge pipe; The second end of the bottom cold plate is provided with a liquid injection port and a liquid discharge port, and the second end of the bottom cold plate and the first end of the bottom cold plate are opposite ends of the bottom cold plate; the liquid injection port is connected to the liquid injection pipe, and the liquid discharge port is connected to the liquid discharge pipe.

7. The liquid cooling assembly according to claim 6, characterized in that A two-way stop valve is provided between the liquid injection port and the liquid injection pipe, and / or a two-way stop valve is provided between the liquid discharge port and the liquid discharge pipe.

8. The liquid cooling assembly according to claim 6, wherein: The injection pipe is provided with an exhaust valve, and the discharge pipe is provided with a discharge valve; When the drain valve is closed and the exhaust valve is open, the gas in the liquid cooling component can be discharged from the exhaust valve; when both the drain valve and the exhaust valve are open, the coolant in the liquid cooling component can be discharged from the drain valve.

9. A battery pack, characterized in that: The battery pack comprises a battery module and a liquid cooling assembly according to any one of claims 1 to 8; The bottom cold plate in the liquid cooling assembly is arranged on the bottom side of the battery module, and the battery module is located between two adjacent side cold plates.

10. An energy storage device, characterized in that: The energy storage device includes the battery pack according to claim 9.

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