Battery module with liquid cooling plate

Abstract

The utility model discloses a battery module with a liquid cooling plate, which comprises a module unit and a liquid cooling plate, and the module unit comprises a plurality of battery cells arranged along the stacking direction; the at least two side surface liquid cooling plates are respectively fixed on the side surfaces, vertical to the stacking direction of the plurality of battery cells, of the module units, a liquid inlet and a liquid outlet are respectively formed in two opposite ends of each side surface liquid cooling plate, and a plurality of liquid cooling channels which are arranged in parallel along the height direction of the module units are arranged between the liquid inlets and the liquid outlets. According to the utility model, the side surface liquid cooling plate provided with the plurality of liquid cooling channels which are arranged in parallel along the height direction of the module is fixed on the side surface of the battery module unit, so that the module can be synchronously and uniformly cooled in the whole height range from the bottom to the top. According to the design, the cooling liquid is ensured to act on different height areas of the module at the same time, and the problems that in the prior art, due to natural upward conduction of heat of bottom liquid cooling, the lower portion is cold, the upper portion is hot, and heat dissipation is uneven are directly solved.

Description

Technical Field

[0001] This utility model relates to the field of battery thermal management technology, and in particular to a battery module with a liquid cooling plate. Background Technology

[0002] Battery systems generate a significant amount of heat during charge-discharge cycles. If this heat cannot be dissipated effectively and promptly, it will lead to excessively high battery operating temperatures, severely impacting performance, cycle life, and safety. Liquid cooling technology, due to its highly efficient heat dissipation capabilities, has become the mainstream battery thermal management solution.

[0003] However, existing battery liquid cooling solutions still have some inherent drawbacks.

[0004] A common solution is bottom liquid cooling, where the cooling plate or cooling pipes are placed at the bottom of the module unit. The drawback of this solution is uneven heat dissipation. Due to the physical property that heat naturally conducts upwards, heat from the upper part of the module unit is difficult to effectively dissipate by the bottom cooling system, easily creating a "cooler at the bottom, hotter at the top" phenomenon, resulting in a large temperature gradient inside the module. This temperature unevenness can seriously affect the consistency of performance among the cells in the battery cluster, thereby shortening the lifespan of the entire battery system.

[0005] Therefore, there is an urgent need in this field for a novel battery liquid cooling solution that can ensure efficient heat dissipation and temperature uniformity while also being compact and highly modular, in order to simplify the production and assembly process and improve the maintainability of energy storage battery systems. Utility Model Content

[0006] The main purpose of this invention is to provide a battery module with a liquid cooling plate to solve the above-mentioned technical problems.

[0007] This utility model provides a battery module with a liquid cooling plate, comprising:

[0008] A module unit, the module unit comprising a plurality of cells arranged in a stacking direction;

[0009] At least two side liquid cooling plates are fixed to the module unit and to the side perpendicular to the stacking direction of the multiple battery cells. Each side liquid cooling plate is provided with an inlet and an outlet at opposite ends. Multiple liquid cooling channels are arranged in parallel along the height direction of the module unit between the inlet and the outlet.

[0010] The module unit has end plates at its two opposite ends, and the side liquid cooling plate is fixed to the end plates by fasteners.

[0011] The side liquid cooling plate includes a first liquid cooling plate disposed on one side of the module unit and a second liquid cooling plate disposed on the other side of the module unit.

[0012] The arrangement directions of the liquid inlet and outlet of the first liquid cooling plate are opposite to those of the liquid inlet and outlet of the second liquid cooling plate.

[0013] The first liquid cooling plate has an inlet connected to an inlet pipe, and the second liquid cooling plate has an outlet connected to an outlet pipe; the outlet of the first liquid cooling plate and the inlet of the second liquid cooling plate are connected through a manifold.

[0014] It also includes multiple pipeline adapters; the liquid inlet pipe is detachably connected to the liquid inlet of the first liquid cooling plate through one of the pipeline adapters; the manifold pipe is detachably connected to the liquid outlet of the first liquid cooling plate and the liquid inlet of the second liquid cooling plate through two of the pipeline adapters respectively; the liquid outlet pipe is detachably connected to the liquid outlet of the second liquid cooling plate through one of the pipeline adapters.

[0015] The pipeline adapter assembly includes a plug and a socket, and the plug and the socket are detachably connected.

[0016] Each of the side liquid cooling plates includes a first plate and a second plate. Multiple preset flow channels are formed on the two opposing sides of the first plate and the second plate. Multiple liquid cooling channels are formed between the first plate and the second plate.

[0017] The end plate is provided with a threaded hole, and the side liquid cooling plate is provided with a through hole corresponding to the threaded hole. The fastener is sequentially inserted into the through hole and the threaded hole.

[0018] Multiple battery cells are fixedly connected to the end plate via steel strips.

[0019] The beneficial technical effects of this utility model are as follows: By fixing a side liquid cooling plate with multiple liquid cooling channels arranged in parallel along the height direction of the module to the side of the battery module unit, this utility model can synchronously and uniformly cool the entire height range of the module from bottom to top. This design directly solves the problem of uneven heat dissipation and "bottom cooling and top heating" caused by the natural upward conduction of heat in the bottom liquid cooling system in the prior art by ensuring that the coolant acts on different height areas of the module simultaneously. Furthermore, since the side liquid cooling plate is directly fixed to the end plates at both ends of the module unit, the module unit and its side liquid cooling plate can be used as independent assembly components, which can be pre-assembled and directly installed on the support base plate, thus achieving both compact structure and high modularity. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional schematic diagram of the battery module provided in an embodiment of the present utility model;

[0022] Figure 2 A three-dimensional schematic diagram of the side liquid cooling plate in the battery module provided in this embodiment of the utility model;

[0023] Figure 3 A schematic cross-sectional view of the side liquid cooling plate in the battery module provided in this embodiment of the utility model;

[0024] Figure 4 A three-dimensional schematic diagram of the battery module mid-end plate provided in an embodiment of this utility model;

[0025] Figure 5 This is a schematic diagram of the pipeline adapter assembly in the battery module provided in an embodiment of the present utility model;

[0026] Figure 6 This is a three-dimensional schematic diagram of the battery module assembly provided in an embodiment of the present utility model;

[0027] Figure 7 This is a top view of the battery module assembly provided in an embodiment of the present invention.

[0028] Explanation of reference numerals in the attached figures:

[0029] In the diagram: 10-Module unit, 11-Battery cell, 12-End plate, 13-Steel strip, 121-Threaded hole, 122-Through hole, 20-Side liquid cooling plate, 21-First liquid cooling plate, 22-Second liquid cooling plate, 23-Liquid inlet, 24-Liquid outlet, 25-Liquid cooling channel, 30-Support base plate, 31-Liquid inlet pipe, 32-Manifold pipe, 33-Liquid outlet pipe, 34-Channel interface, 40-Pipeline adapter assembly, 41-Plug, 42-Socket. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0031] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0032] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0033] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0034] Please also refer to Figures 1-7 This utility model provides a battery module with a liquid cooling plate, comprising: a module unit 10, the module unit 10 including a plurality of battery cells 11 arranged along the stacking direction; at least two side liquid cooling plates 20, the at least two side liquid cooling plates 20 being fixed to the module unit 10 on a side perpendicular to the stacking direction of the plurality of battery cells 11, each side liquid cooling plate 20 having an inlet 23 and an outlet 24 at opposite ends, and a plurality of liquid cooling channels 25 arranged in parallel along the height direction of the module unit 10 being provided between the inlet 23 and the outlet 24; wherein, end plates 12 are provided at opposite ends of the module unit 10, and the side liquid cooling plates 20 are fixed to the end plates 12 by fasteners.

[0035] In this embodiment, the module unit 10 includes a module unit 10, at least two side liquid cooling plates 20, and end plates 12 disposed at opposite ends of the module unit 10.

[0036] Specifically, the module unit 10 is composed of multiple sheet-shaped battery cells 11. Inside a module unit 10, multiple battery cells 11 are bonded together with their largest surface areas and arranged closely along a horizontal direction—that is, the stacking direction. This stacking method causes the module unit 10 to form a cuboid structure macroscopically. This cuboid structure has two end faces parallel to the stacking direction of the battery cells 11, and two wide side faces perpendicular to the stacking direction of the battery cells 11.

[0037] Two side liquid cooling plates 20 are provided, each fixed to one of the two wide sides of the module unit 10. Since the wide sides are formed by the narrow sides of all the battery cells 11, the mounting position of the side liquid cooling plates 20 is perpendicular to the stacking direction of the battery cells 11. This arrangement allows the side liquid cooling plates 20 to simultaneously dissipate heat for each battery cell 11 within the module unit 10, achieving lateral cooling coverage for the entire module unit 10.

[0038] The internal structure of each side liquid cooling plate 20 is designed to achieve efficient and uniform flow of coolant. Specifically, each side liquid cooling plate 20 has an inlet 23 and an outlet 24 at opposite ends for coolant inflow and outflow. Between the inlet 23 and outlet 24, multiple parallel liquid cooling channels 25 are arranged. These channels 25 are stacked along the height of the module unit 10 and connected in parallel to the inlet 23 and outlet 24. When coolant enters through the inlet 23, it is evenly distributed into all the parallel liquid cooling channels 25 and flows across the entire heat exchange surface of the side liquid cooling plate 20, thereby uniformly cooling the entire height range of the module unit 10 from bottom to top. This effectively solves the common "lower cooling, higher cooling" problem in traditional bottom cooling solutions and significantly improves the temperature uniformity inside the module.

[0039] To ensure a stable installation of the side liquid cooling plate 20 on the module unit 10, this embodiment provides an end plate 12 at each end of the module unit 10 along the stacking direction. These two end plates 12 not only provide compression and protection for the battery cell 11 but also provide a mounting surface for the side liquid cooling plate 20. The side liquid cooling plate 20 is fixed to the corresponding end plate 12 using fasteners. For example, the fasteners can be standard parts such as bolts or screws. This indirect fixing method using the end plates 12 avoids direct force on the battery cell 11 body, ensuring the structural integrity and safety of the module unit 10, and also facilitates the installation and removal of the side liquid cooling plate 20.

[0040] In summary, this embodiment achieves uniform cooling of the module unit 10 in the height direction by fixing the side liquid cooling plate 20 with parallel liquid cooling channels 25 to the side of the module unit 10, effectively improving heat dissipation performance and temperature consistency. Its structural design is reasonable and easy to implement.

[0041] In one embodiment, the side liquid cooling plate 20 includes a first liquid cooling plate 21 disposed on one side of the module unit 10 and a second liquid cooling plate 22 disposed on the other side of the module unit 10.

[0042] In this embodiment, the side liquid cooling plate 20 includes a first liquid cooling plate 21 and a second liquid cooling plate 22. Specifically, the module unit 10 has two opposing wide side surfaces perpendicular to the stacking direction of the battery cells 11. The first liquid cooling plate 21 is fixed to one of the wide side surfaces, and correspondingly, the second liquid cooling plate 22 is fixed to the other wide side surface of the module unit 10 opposite to the first liquid cooling plate 21.

[0043] This "sandwich" structure, where the module unit 10 is symmetrically sandwiched between the first liquid cooling plate 21 and the second liquid cooling plate 22, achieves double-sided cooling of the module unit 10. Compared to single-sided cooling, double-sided cooling provides a larger heat exchange area, enabling faster and more efficient heat dissipation from the battery cell 11 during charging and discharging, thereby further improving the overall heat dissipation efficiency and keeping the temperature of the module unit 10 within a more ideal operating range.

[0044] In one embodiment, the arrangement direction of the liquid inlet 23 and the liquid outlet 24 of the first liquid cooling plate 21 is opposite to the arrangement direction of the liquid inlet 23 and the liquid outlet 24 of the second liquid cooling plate 22.

[0045] In this embodiment, the macroscopic flow path direction from its inlet 23 to its outlet 24 on a single side liquid cooling plate 20 is defined as the "arrangement direction" of the liquid cooling plate. A key feature of this embodiment is that the arrangement direction of the first liquid cooling plate 21 is opposite to that of the second liquid cooling plate 22.

[0046] To illustrate this more clearly, let's consider a concrete example. Suppose that module unit 10 is defined with two ends along its length, namely the front end and the rear end.

[0047] In a preferred arrangement, the inlet 23 of the first liquid cooling plate 21 is located near the front end of the module unit 10, while its outlet 24 is located near the rear end. Therefore, the overall flow direction of the coolant within the first liquid cooling plate 21 is from the front end to the rear end.

[0048] Conversely, the inlet 23 of the second liquid cooling plate 22 is located near the rear end of the module unit 10, and its outlet 24 is located near the front end. Therefore, the overall flow direction of the coolant within the second liquid cooling plate 22 is from the rear end to the front end.

[0049] This "convection" design effectively balances the temperature gradient along the length of the entire battery module, helping to improve the long-term operational stability and reliability of the entire battery system.

[0050] In one embodiment, the liquid inlet 23 of the first liquid cooling plate 21 is connected to a liquid inlet pipe 31, and the liquid outlet 24 of the second liquid cooling plate 22 is connected to a liquid outlet pipe 33; the liquid outlet 24 of the first liquid cooling plate 21 and the liquid inlet 23 of the second liquid cooling plate 22 are connected through a manifold pipe 32.

[0051] In this embodiment, the coolant flow path of the entire battery module is organized through three main pipes: an inlet pipe 31, an outlet pipe 33, and a manifold pipe 32. These pipes can be individual fittings or flow channels opened on the support base plate 30 used to support the entire battery module.

[0052] Specifically, the inlet 23 of the first liquid cooling plate 21 serves as the starting point of the entire cooling circuit and is connected to the inlet pipe 31. The low-temperature coolant provided by the external cooling system is first introduced into the first liquid cooling plate 21 through the inlet pipe 31 to perform the first stage of cooling on one side of the module unit 10.

[0053] After absorbing heat, the cooled liquid, now at a slightly elevated temperature, flows out from the outlet 24 of the first liquid-cooled plate 21. Simultaneously, the inlet 23 of the second liquid-cooled plate 22 prepares to receive this cooled liquid for secondary cooling. To achieve this flow path connection, this embodiment includes a manifold 32. One end of the manifold 32 is connected to the outlet 24 of the first liquid-cooled plate 21, and the other end is connected to the inlet 23 of the second liquid-cooled plate 22. In this way, the cooled liquid flowing from the first liquid-cooled plate 21 can be smoothly introduced into the second liquid-cooled plate 22 through this manifold 32.

[0054] After entering the second liquid cooling plate 22, the coolant continues to flow and absorbs heat from the other side of the module unit 10, completing the second stage of cooling. At this time, the temperature of the coolant further increases. Finally, this high-temperature coolant flows out from the outlet 24 of the second liquid cooling plate 22. This outlet 24 is connected to the outlet pipe 33, serving as the end point of the entire cooling circuit. The coolant is led out of the battery module through the outlet pipe 33 and sent back to the external cooling system for cooling, thus completing one complete cooling cycle.

[0055] By combining the aforementioned inlet pipe 31, manifold pipe 32, and outlet pipe 33, this embodiment constructs a two-stage series system for the first liquid cooling plate 21 and the second liquid cooling plate 22 in the liquid path. This series structure not only increases the total heat exchange distance between the coolant and the battery module, improving the temperature rise of the coolant and increasing the heat exchange efficiency, but also achieves more balanced temperature control of the entire battery module through two-stage counter-flow cooling.

[0056] In one embodiment, the battery module further includes multiple pipeline adapter assemblies 40; the liquid inlet pipe 31 is detachably connected to the liquid inlet 23 of the first liquid cooling plate 21 via one of the pipeline adapter assemblies 40; the manifold pipe 32 is detachably connected to the liquid outlet 24 of the first liquid cooling plate 21 and the liquid inlet 23 of the second liquid cooling plate 22 via two of the pipeline adapter assemblies 40 respectively; the liquid outlet pipe 33 is detachably connected to the liquid outlet 24 of the second liquid cooling plate 22 via one of the pipeline adapter assemblies 40.

[0057] In this embodiment, the inlet pipe 31, the manifold pipe 32, and the outlet pipe 33 are not directly connected to the ports of the liquid cooling plate, but are connected through the pipe adapter assembly 40. These connections are detachable.

[0058] The specific connection relationships are as follows:

[0059] Liquid inlet connection: The liquid inlet pipe 31 is detachably connected to the liquid inlet 23 of the first liquid cooling plate 21 through a pipe adapter assembly 40.

[0060] Intermediate junction connection: The connection of the junction pipe 32 involves two ports. Therefore, it is detachably connected to the outlet 24 of the first liquid cooling plate 21 and detachably connected to the inlet 23 of the second liquid cooling plate 22 through two pipe adapter assemblies 40.

[0061] Liquid outlet connection: The liquid outlet pipe 33 is detachably connected to the liquid outlet 24 of the second liquid cooling plate 22 through a pipe adapter assembly 40.

[0062] In summary, a complete cooling flow path for a battery module requires four pipe adapter components 40, which correspond to the inlet and outlet of the first liquid cooling plate 21 and the inlet and outlet of the second liquid cooling plate 22, respectively.

[0063] The use of pipe adapter components 40 for detachable connection brings significant technical advantages. During production and assembly, the module unit 10 and the side liquid cooling plate 20 can be pre-assembled into an independent "module unit 10" without external piping. On the assembly line, workers only need to align and insert the corresponding pipe adapter components 40 to quickly complete the liquid circuit connection, greatly simplifying the assembly process. More importantly, in subsequent maintenance or repair, if a battery module needs to be replaced, maintenance personnel do not need to perform complex pipe cutting and re-welding work. They only need to disconnect the corresponding pipe adapter components 40 to completely and conveniently disassemble and replace the entire "cooling module unit 10," greatly shortening maintenance time, reducing maintenance costs, and reflecting a highly modular design concept.

[0064] In one embodiment, the pipe adapter assembly 40 includes a plug 41 and a socket 42, wherein the plug 41 and the socket 42 are detachably connected.

[0065] In this embodiment, the pipe adapter assembly 40 is specifically composed of a plug 41 and a socket 42 that mate with each other. Specifically, one component of the plug 41 and the socket 42 is connected to or integrally formed with a port (inlet 23 or outlet 24) of the liquid cooling plate, while the other component is connected to or integrally formed with a corresponding pipe (inlet pipe, manifold pipe 32, or outlet pipe). For example, in a preferred design, the socket 42 can be integrated into the support base plate 30 and communicate with the integrated pipe, while the plug 41, as part of the pipe adapter assembly 40, can be inserted into the socket 42. Here, the plug 41 and the socket 42 are hollow structures to facilitate the passage of liquid.

[0066] The connection between the plug 41 and the socket 42 is detachable. Specifically, the plug 41 is a pipe with a smaller outer diameter, and the socket 42 is a pipe with a larger inner diameter. The plug 41 can be directly inserted into the socket 42. This means that during assembly, operators do not need to use special tools such as wrenches to tighten or fix the plug; they only need to align the plug 41 with the socket 42 and push it in to complete the connection. Similarly, during disassembly, simply pulling out the plug 41 completes the disassembly.

[0067] To ensure a tight seal after connection and prevent coolant leakage, the socket 42 may be equipped with an elastic seal such as an O-ring. When the plug 41 is inserted, its outer surface will be tightly pressed against the O-ring, forming a reliable liquid-tight barrier.

[0068] By employing this quick-connect tubing adapter assembly 40, consisting of a plug 41 and a socket 42, this embodiment achieves a "plug-and-play" and "plug-and-remove" fluid connection method. This greatly improves the production and assembly efficiency of the energy storage battery and provides significant convenience for subsequent maintenance and replacement work.

[0069] In one embodiment, each of the side liquid cooling plates 20 includes a first plate and a second plate. Multiple preset flow channels are formed on the two opposing sides of the first plate and the second plate. Multiple liquid cooling channels 25 are formed between the first plate and the second plate.

[0070] In this embodiment, each of the side liquid cooling plates 20 is not a solid or hollow integral structure, but is formed by the joining of two independent metal plates, the first plate and the second plate.

[0071] Specifically, in the manufacturing process, two metal plates of the same size and shape are first selected as the first plate and the second plate. Then, using forming processes such as stamping or die casting, multiple grooves of pre-set shapes and positions are machined on the inner surfaces of the first and second plates where they need to contact each other. These grooves are the pre-set flow channels. The pre-set flow channel patterns on the two plates are mirror images of each other or match each other.

[0072] After molding, the first and second plates are aligned and stacked together, ensuring that the pre-designed flow channels on their inner surfaces align precisely. When the two plates are joined, the pre-designed flow channels on one plate and the other plate together form a hollow channel. This channel, formed by the aligned pre-designed flow channels, is the liquid cooling channel 25.

[0073] Finally, the contact edges of the first and second plates, as well as the boundary of the liquid cooling channel 25, are securely sealed and connected by welding or other methods to form an integral side liquid cooling plate 20 with an internal flow channel network. By adopting this manufacturing method of stamping and welding two plates together, manufacturing costs can be effectively controlled while ensuring that the liquid cooling plate has good structural strength and sealing performance.

[0074] In one embodiment, the end plate 12 is provided with a threaded hole 121, and the side liquid cooling plate 20 is provided with a through hole 122 corresponding to the threaded hole 121. The fastener is sequentially inserted into the through hole 122 and the threaded hole 121.

[0075] In this embodiment, a plurality of threaded holes 121 are pre-machined on the end plate 12. The positions of these threaded holes 121 are set according to the installation requirements of the side liquid cooling plate 20.

[0076] Accordingly, a plurality of through holes 122 are provided on the side liquid cooling plate 20. The positions of these through holes 122 correspond one-to-one with the threaded holes 121 on the end plate 12. The diameter of the through holes 122 is slightly larger than the diameter of the fastener rod to facilitate its passage.

[0077] During assembly, the side liquid cooling plate 20 is first placed on the side of the module unit 10, with its through holes 122 aligned with the threaded holes 121 on the end plate 12. Then, fasteners (e.g., bolts or screws) are passed sequentially through the through holes 122 on the side liquid cooling plate 20 and screwed into the corresponding threaded holes 121 on the end plate 12. By tightening these fasteners, the side liquid cooling plate 20 is securely and with a certain clamping force fixed to the end plate 12, thus closely fitting against the side of the module unit 10 to ensure good thermal contact.

[0078] This connection method, using "through hole 122 + threaded hole 121 + fastener," is a very mature and reliable mechanical connection solution. It not only offers high connection strength, resisting vibration and impact, but also makes assembly and disassembly very convenient, requiring only standard tools. This further enhances the modularity and maintainability of the entire battery module.

[0079] In one embodiment, a plurality of the battery cells 11 are fixedly connected to the end plate 12 by a steel strip 13.

[0080] In this embodiment, steel straps 13 are used to bind and fix multiple battery cells 11 arranged along the stacking direction and end plates 12 located at both ends into a stable and solid whole.

[0081] Specifically, after arranging multiple battery cells 11 and two end plates 12 in a predetermined order, one or more high-strength steel strips 13 are used to wrap around the outer periphery of the entire assembly consisting of "end plate 12-cell 11 stack-end plate 12" and apply a pre-tightening force to the steel strips 13 so that they tightly bind the entire module unit 10.

[0082] The fixed module unit 10 provides a solid foundation for the subsequent installation of the side liquid cooling plate 20. Since the end plate 12 has been firmly integrated with the battery cell 11 by the steel strip 13, fixing the side liquid cooling plate 20 to the end plate 12 is equivalent to reliably fixing it to the entire module unit 10.

[0083] In one embodiment, the inlet pipe 31, outlet pipe 33, and manifold pipe 32 are not independent external pipe fittings, but are directly integrated into the structure of the supporting base plate 30 as internal flow channels. These internal flow channels can be integrally formed inside the base plate by casting, machining, or other methods.

[0084] On the upper surface of the supporting base plate 30, a plurality of channel interfaces 34 connected to the internal flow channels are opened at predetermined positions. These channel interfaces 34 correspond to the connection requirements of the liquid inlet 23 and liquid outlet 24 of the first liquid cooling plate 21, and the liquid inlet 23 and liquid outlet 24 of the second liquid cooling plate 22.

[0085] In this structure, the socket 42 can be directly integrated into each channel interface 34 of the supporting base plate 30 as a fixed connection port. The plug 41 is connected to each port (inlet / outlet) of the side liquid cooling plate 20.

[0086] During assembly, simply place the battery module 10 with the side liquid cooling plate 20 already installed on the support base plate 30, and then insert the plug 41 connected to the liquid cooling plate port into the corresponding socket 42 on the support base plate 30 to complete the connection of all liquid circuits.

[0087] In one specific application embodiment, a plurality of the module units 10 and a plurality of the side liquid cooling plates 20 are alternately arranged on the supporting base plate 30.

[0088] In this embodiment, taking N module units 10 as an example, their arrangement is: side liquid cooling plate 20 - module unit 10 - side liquid cooling plate 20 - module unit 10... - side liquid cooling plate 20. In this layout, each module unit 10, whether located in the middle or on the outermost side, has its two opposite wide sides tightly fitted by a side liquid cooling plate 20. In other words, each module unit 10 is completely "sandwiched" between two side liquid cooling plates 20. Assuming there are four module units 10 equipped with five side liquid cooling plates 20, the liquid inlets 23 of the three on the left are located at the front end of the supporting base plate 30, and the liquid inlets 23 of the two on the right are located at the rear end of the supporting base plate.

[0089] This alternating arrangement, except for the two outermost side liquid cooling plates 20, allows all the inner side liquid cooling plates 20 to simultaneously serve two adjacent module units 10. That is, one liquid cooling plate dissipates heat to the right side of one module unit 10 and simultaneously dissipates heat to the left side of the other module unit 10. This design achieves efficient reuse of heat dissipation components, reducing the total number of required liquid cooling plates without sacrificing heat dissipation performance, thereby effectively reducing the overall cost, weight, and complexity of the energy storage battery.

[0090] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A battery module with a liquid cooling plate, characterized in that, include: A module unit, the module unit comprising a plurality of cells arranged in a stacking direction; At least two side liquid cooling plates are fixed to the module unit and to the side perpendicular to the stacking direction of the multiple battery cells. Each side liquid cooling plate is provided with an inlet and an outlet at opposite ends. Multiple liquid cooling channels are arranged in parallel along the height direction of the module unit between the inlet and the outlet. The module unit has end plates at its two opposite ends, and the side liquid cooling plate is fixed to the end plates by fasteners.

2. The battery module according to claim 1, characterized in that, The side liquid cooling plate includes a first liquid cooling plate disposed on one side of the module unit and a second liquid cooling plate disposed on the other side of the module unit.

3. The battery module according to claim 2, characterized in that, The arrangement direction of the liquid inlet and the liquid outlet of the first liquid cooling plate is opposite to the arrangement direction of the liquid inlet and the liquid outlet of the second liquid cooling plate.

4. The battery module according to claim 3, characterized in that, The liquid inlet of the first liquid cooling plate is connected to an inlet pipe, and the liquid outlet of the second liquid cooling plate is connected to an outlet pipe; the liquid outlet of the first liquid cooling plate and the liquid inlet of the second liquid cooling plate are connected through a manifold.

5. The battery module according to claim 4, characterized in that, It also includes multiple pipeline adapter assemblies; the liquid inlet pipe is detachably connected to the liquid inlet of the first liquid cooling plate through one of the pipeline adapter assemblies; the manifold pipe is detachably connected to the liquid outlet of the first liquid cooling plate and the liquid inlet of the second liquid cooling plate through two of the pipeline adapter assemblies respectively; the liquid outlet pipe is detachably connected to the liquid outlet of the second liquid cooling plate through one of the pipeline adapter assemblies.

6. The battery module according to claim 5, characterized in that, The pipe adapter assembly includes a plug and a socket, and the plug and the socket are detachably connected.

7. The battery module according to claim 1, characterized in that, Each of the side liquid cooling plates includes a first plate and a second plate. Multiple preset flow channels are formed on the two opposing sides of the first plate and the second plate. Multiple liquid cooling channels are formed between the first plate and the second plate.

8. The battery module according to claim 1, characterized in that, The end plate is provided with a threaded hole, and the side liquid cooling plate is provided with a through hole corresponding to the threaded hole. The fastener is sequentially inserted into the through hole and the threaded hole.

9. The battery module according to claim 1, characterized in that, Multiple battery cells are fixedly connected to the end plate by steel strips.

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