Liquid-cooled pack module full-wrapping heat dissipation device
By combining fully enclosed heat dissipation components with liquid cooling circulation components, the problems of uneven heat dissipation and complex production of liquid cooling pack modules are solved, achieving uniform temperature conduction of battery cells and reduced production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANZHITONGHE NEW ENERGY TECHNOLOGY (SHANGHAI) CO LTD
- Filing Date
- 2025-07-08
- Publication Date
- 2026-07-31
AI Technical Summary
Existing liquid-cooled pack module heat dissipation structures suffer from uneven heat dissipation, low efficiency, and complex and costly production processes. In particular, heat accumulation in the middle cells leads to higher temperatures, affecting service life and increasing production difficulty and costs.
The design employs a fully enclosed heat dissipation component that contacts the heating surface of each battery cell. Combined with a liquid cooling circulation assembly, a coolant circulation system is formed. The gaps are filled with a thermally conductive medium and fixed by a detachable connection structure, simplifying the production process and replacing traditional end plates and metal cable ties.
It achieves uniform temperature conduction of the battery cell, significantly improves heat dissipation efficiency, shortens the working time of the liquid cooler, reduces production costs, simplifies production processes, and improves production efficiency.
Smart Images
Figure CN224583525U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat dissipation devices for liquid-cooled pack modules, and more particularly to a fully enclosed heat dissipation device for liquid-cooled pack modules. Background Technology
[0002] In the field of liquid-cooled pack module heat dissipation technology, existing liquid-cooled pack heat dissipation structures have significant shortcomings in practical applications. Current technology requires first fabricating and stacking the modules according to requirements, then applying thermally conductive adhesive to the bottom of the modules, and finally fixing the modules to a heat sink. While this structure has the advantage of simple component fabrication, it also has many drawbacks.
[0003] From a heat dissipation efficiency perspective, existing heat sinks are simply flat plates, with only one surface of the module in contact with the heat sink. This results in slow overall heat dissipation. Especially for stacked modules, heat tends to accumulate in the middle cells, making it difficult to dissipate, thus causing the middle cells to have a higher temperature compared to the cells on the sides. This temperature difference reduces the lifespan of the middle cells compared to the outer cells, ultimately decreasing the lifespan of the entire module.
[0004] In terms of production and processing, the existing structure requires module stacking first, but the equipment for stacking modules is expensive. At the same time, the module stacking relies on the end plates on both sides and metal cable ties for fixation, and equipment fixtures are also required during stacking. This not only increases the complexity of the production process, but also raises the requirements for production equipment and parts, making production more difficult and increasing costs.
[0005] In summary, existing liquid-cooled pack module heat dissipation structures suffer from uneven heat dissipation, low efficiency, and complex and costly manufacturing processes, and these technical challenges urgently need to be addressed through structural improvements. Utility Model Content
[0006] The purpose of this invention is to provide a fully enclosed heat dissipation device for liquid-cooled pack modules to solve the above-mentioned problems.
[0007] To achieve the above objectives, this utility model provides a liquid-cooled pack module fully enclosed heat dissipation device, including a bottom heat dissipation component, a fully enclosed heat dissipation component, a battery cell module, and a liquid cooling circulation assembly;
[0008] The fully enclosed heat dissipation component is located above the bottom heat dissipation component, the battery cell module is located inside the fully enclosed heat dissipation component, and the heating surface of each battery cell in the battery cell module is in contact with the fully enclosed heat dissipation component. The gap between the fully enclosed heat dissipation component and the battery cell is filled with a thermally conductive medium.
[0009] The liquid cooling circulation assembly connects the bottom heat dissipation component and the fully enclosed heat dissipation component for coolant circulation; the fully enclosed heat dissipation component is provided with a coolant inlet and a coolant outlet, and the bottom heat dissipation component is provided with an interface adapted to the liquid cooling circulation assembly.
[0010] Furthermore, in the liquid-cooled pack module fully enclosed heat dissipation device, the bottom heat dissipation component is provided with an installation and positioning structure for fixing the fully enclosed heat dissipation component and the battery cell module to the bottom heat dissipation component.
[0011] Furthermore, in the liquid-cooled Pack module fully enclosed heat dissipation device, the thermally conductive medium is thermally conductive adhesive or thermally conductive silicone grease.
[0012] Furthermore, in the liquid-cooled Pack module fully enclosed heat dissipation device, the liquid-cooled circulation component includes an inlet pipe and an outlet pipe.
[0013] One end of the liquid inlet pipe is connected to the coolant inlet, and the other end is connected to the liquid inlet of the bottom heat dissipation component. One end of the liquid outlet pipe is connected to the coolant outlet, and the other end is connected to the liquid outlet of the bottom heat dissipation component, forming a circulation loop.
[0014] Furthermore, in the liquid-cooled Pack module fully enclosed heat dissipation device, the fully enclosed heat dissipation component is an aluminum plate, a copper plate, or an aluminum alloy plate.
[0015] Furthermore, in the liquid-cooled pack module fully enclosed heat dissipation device, the battery cell module includes an electrical connection structure, which is located on the top of the battery cell module and is used to realize electrical connection between the battery cells.
[0016] Furthermore, in the liquid-cooled pack module fully enclosed heat dissipation device, both the bottom heat dissipation component and the fully enclosed heat dissipation component are provided with flow guiding channels to guide the flow of coolant.
[0017] Furthermore, in the liquid-cooled pack module fully enclosed heat dissipation device, the coolant inlet and coolant outlet are arranged side by side on the same edge of the fully enclosed heat dissipation component, and the fully enclosed heat dissipation component is provided with a partition structure. The partition structure divides the coolant flow path into an inlet channel extending from the coolant inlet to the opposite side and an outlet channel returning from the opposite side to the coolant outlet. The inlet channel and the outlet channel are interconnected through a guide groove provided in the gap of the cell module to form a reciprocating flow loop.
[0018] Furthermore, in the liquid-cooled pack module fully enclosed heat dissipation device, the outline of the fully enclosed heat dissipation component is adapted to the shape of the battery cell module to completely enclose the battery cell module.
[0019] Furthermore, in the liquid-cooled Pack module fully enclosed heat dissipation device, the bottom heat dissipation component and the fully enclosed heat dissipation component are fixed by a detachable connection structure, which includes bolt connection, snap-fit connection or slot connection.
[0020] Compared with the prior art, the present invention has at least the following beneficial effects:
[0021] This invention utilizes a structural design where a fully enclosed heat dissipation component contacts the heating surface of each battery cell. Combined with a liquid cooling circulation system connecting the bottom heat dissipation component and the fully enclosed heat dissipation component, this significantly improves heat transfer speed, drastically reduces the operating time of the liquid cooler, and effectively solves the problem of high temperature caused by heat accumulation in the middle battery cells, thus achieving uniform temperature conduction within the battery cells. Furthermore, the fully enclosed heat dissipation component replaces the traditional end plates and metal cable ties on both sides of the module, eliminating the need for equipment fixtures for module stacking, reducing the number of parts, simplifying production processes, and lowering equipment costs. It offers the dual advantages of improved heat dissipation efficiency and optimized production processes. Attached Figure Description
[0022] Figure 1 This is an isometric side view of a fully enclosed heat dissipation device for a liquid-cooled pack module according to an embodiment of this utility model;
[0023] Figure 2 This is a schematic diagram of the internal coolant flow path of a fully enclosed heat dissipation component in one embodiment of this utility model;
[0024] Figure 3 This is a schematic diagram of the temperature distribution of the battery cell terminals after the existing structural module has been running at full power for 15 minutes in one embodiment of this utility model.
[0025] Figure 4 This is a schematic diagram of the temperature distribution of the battery cell terminals after the new structural module has been running at full power for 15 minutes in one embodiment of this utility model.
[0026] Figure 5 This is a schematic diagram showing the working time and temperature change of the liquid cooler when the temperature of the electrode post of the existing structure battery cell drops to 30°C in one embodiment of this utility model.
[0027] Figure 6 This is a schematic diagram showing the working time and temperature change of the liquid cooler when the temperature of the electrode post of the new structure battery cell drops to 30°C in one embodiment of this utility model.
[0028] Among them, 1. Bottom heat dissipation component; 2. Fully enclosed heat dissipation component; 21. Coolant inlet; 22. Coolant outlet; 31. Battery cell; 32. Aluminum busbar. Detailed Implementation
[0029] The following is a more detailed description of a fully enclosed heat dissipation device for a liquid-cooled pack module according to the present invention, with reference to the schematic diagrams, which illustrate preferred embodiments of the present invention. It should be understood that those skilled in the art can modify the present invention described herein while still achieving its advantageous effects. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the present invention.
[0030] For clarity, not all features of the actual embodiments are described. In the following description, well-known functions and structures are not detailed in detail, as they would confuse the present invention with unnecessary detail. It should be understood that in the development of any actual embodiment, numerous implementation details must be made to achieve the developer's specific goals, such as changes from one embodiment to another according to limitations related to the system or business. Furthermore, it should be understood that such development work may be complex and time-consuming, but is merely routine work for those skilled in the art.
[0031] The present invention will be described more specifically by way of example in the following paragraphs with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description and claims. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.
[0032] Based on the teachings of this specification, those skilled in the art can form new technical solutions by combining different implementation methods without creating technical contradictions. Such variations should be considered to fall within the protection scope of this patent.
[0033] Example 1
[0034] like Figure 1 As shown, this embodiment discloses a liquid-cooled Pack module fully enclosed heat dissipation device. The heat dissipation structure includes a bottom heat dissipation component 1, a fully enclosed heat dissipation component 2, a battery cell module, and a liquid cooling circulation assembly (not shown).
[0035] The fully enclosed heat dissipation component 2 is disposed above the bottom heat dissipation component 1. The battery cell module is disposed inside the fully enclosed heat dissipation component 2, and the heating surface of each battery cell 31 of the battery cell module is in contact with the fully enclosed heat dissipation component 2. The gap between the fully enclosed heat dissipation component 2 and the battery cell 31 is filled with a thermally conductive medium. The liquid cooling circulation assembly connects the bottom heat dissipation component 1 and the fully enclosed heat dissipation component 2 for coolant circulation. The fully enclosed heat dissipation component 2 is provided with a coolant inlet 21 and a coolant outlet 22, and the bottom heat dissipation component 1 is provided with an interface adapted to the liquid cooling circulation assembly.
[0036] Specifically, the bottom heat dissipation component 1 is made of aluminum alloy and has a rectangular flat plate structure. Mounting holes (not shown) are provided at the four corners of the bottom heat dissipation component 1. These mounting holes serve as mounting and positioning structures for fixing the fully enclosed heat dissipation component 2 and the battery module to the bottom heat dissipation component 1 using bolts. Simultaneously, the bottom heat dissipation component 1 has spiral or serpentine flow channels inside to extend the flow path of the coolant and increase the heat exchange area. Both ends are provided with inlet ports (not shown) and outlet ports (not shown) adapted to the liquid cooling circulation assembly, respectively, to guide the orderly flow of coolant. The interfaces are threaded connections for connection to the piping of the liquid cooling circulation assembly.
[0037] Furthermore, the material of the fully enclosed heat dissipation component 2 can be an aluminum plate, a copper plate, or an aluminum alloy plate. In this embodiment, the fully enclosed heat dissipation component 2 is made of aluminum alloy plate and integrally formed by stamping process. Its outline is completely adapted to the shape of the battery cell module. The internal cavity size of the fully enclosed heat dissipation component 2 is 0.2-0.5mm larger than the overall size of the battery cell module, which can achieve complete encapsulation of the battery cell module. A coolant inlet 21 and a coolant outlet 22 are arranged side by side on the same edge of the component (the interface specifications are consistent with the bottom heat dissipation component). The internal part has a partition structure (not shown, such as a partition with the same depth as the cavity) to divide the internal space into a liquid inlet channel and a liquid outlet channel. Figure 2 As shown, the inlet channel extends from the coolant inlet 21 to the opposite side, and the outlet channel returns from the opposite side to the coolant outlet 22. The two are interconnected through a guide groove (not shown) at the gap between the battery modules, forming a reciprocating flow loop. In addition, the bottom edge of the fully enclosed heat dissipation component 2 is provided with through holes corresponding to the mounting and positioning holes of the bottom heat dissipation component 1, and the two can be fixed by bolt connection.
[0038] In this embodiment, as Figure 1The battery cell module consists of multiple square battery cells 31 arranged in a matrix. Each battery cell 31 has positive and negative terminals at its two axial ends, which are electrically connected via an electrical connection structure located on the top of the module. This electrical connection structure is made of copper busbars 32, which are welded to the positive and negative terminals of the battery cells to form a stable circuit connection. The heating surface of each battery cell 31 in the module is in contact with the inner wall of the fully enclosed heat dissipation component 2. The gap between the fully enclosed heat dissipation component 2 and the battery cell 31 is filled with thermally conductive adhesive or thermally conductive silicone grease. After curing, this fills the gap to achieve tight contact and ensures efficient heat transfer from the battery cell to the fully enclosed heat dissipation component.
[0039] In this embodiment, the liquid cooling circulation assembly (not shown) includes an inlet pipe and an outlet pipe, both made of materials resistant to high and low temperatures, such as fluororubber tubing. One end of the inlet pipe is connected to the coolant inlet 21 of the fully enclosed heat dissipation component 2 via a threaded connection, and the other end is connected to the inlet port (not shown) of the bottom heat dissipation component 1 via a threaded connection. One end of the outlet pipe is connected to the coolant outlet 22 of the fully enclosed heat dissipation component 2 via a threaded connection, and the other end is connected to the outlet port (not shown) of the bottom heat dissipation component 1 via a threaded connection, thereby forming a complete coolant circulation loop. The liquid cooling circulation assembly 1 also includes a circulation pump (not shown) and a radiator (not shown). The circulation pump provides the power for coolant circulation, and the radiator dissipates heat and cools the coolant.
[0040] Furthermore, the assembly process of the fully enclosed heat dissipation device for the liquid-cooled Pack module is as follows:
[0041] First, take out the fully enclosed heat dissipation component 2 and place it on a flat surface. Then, place each battery cell 31 into the internal cavity of the fully enclosed heat dissipation component 2 as required, ensuring that the heat-generating surface of each battery cell 1 (the five surfaces other than the terminal surface) is in contact with the inner wall of the fully enclosed heat dissipation component 2.
[0042] Then, thermally conductive adhesive is injected into the gap between the fully enclosed heat dissipation component 2 and the battery cell 31, and left to cure. After the thermally conductive adhesive has cured, copper busbar 32 is welded to the top of the battery cell module to complete the combination of the battery cell module and the fully enclosed heat dissipation component 2.
[0043] The assembly is then placed on the bottom heat dissipation component 1. The fully enclosed heat dissipation component 2 and the battery cell module are then fixed to the bottom heat dissipation component 1 using bolts through the mounting positioning holes on the bottom heat dissipation component 1.
[0044] Connect the inlet and outlet pipes of the liquid cooling circulation assembly. Connect the two ends of the inlet pipe to the coolant inlet 21 of the fully enclosed heat dissipation component 2 and the inlet interface of the bottom heat dissipation component 1, respectively. Connect the two ends of the outlet pipe to the coolant outlet 22 of the fully enclosed heat dissipation component 2 and the outlet interface of the bottom heat dissipation component 1, respectively, to ensure that the connection is firm and well sealed.
[0045] Finally, connect the circulation pump and radiator in the liquid cooling circulation assembly to the inlet and outlet pipes to complete the assembly of the entire liquid cooling pack module's fully enclosed heat dissipation device.
[0046] Furthermore, the specific working process of the liquid-cooled Pack module's fully enclosed heat dissipation device is as follows:
[0047] When the battery cell module generates heat during operation, the heat is first conducted to the fully enclosed heat sink 2 through the thermally conductive adhesive. At this time, the circulation pump in the liquid cooling circulation assembly starts, drawing coolant from the radiator and delivering it through the inlet pipe to the coolant inlet 21 of the fully enclosed heat sink 2. After entering the fully enclosed heat sink 2, the coolant flows along the internal guide channel, absorbing heat from the fully enclosed heat sink 2 and lowering its temperature, thereby dissipating heat from the battery cell module. The coolant that has absorbed heat enters the outlet pipe through the coolant outlet 22 of the fully enclosed heat sink 2, and then flows back to the outlet port of the bottom heat sink 1, entering the guide channel of the bottom heat sink 1. In the guide channel of the bottom heat sink 1, the coolant continues to absorb heat from the bottom heat sink 1, further reducing its temperature. Finally, the coolant flows back to the radiator through the inlet port of the bottom heat sink 1, where it is cooled down before being drawn out again by the circulation pump to enter the next cycle. Through the circulation of this coolant, the heat generated by the battery cell module is continuously carried away, achieving efficient heat dissipation of the battery cell module and ensuring that the battery cell module operates within the normal temperature range.
[0048] Example 2
[0049] This embodiment verifies the difference in heat dissipation performance between the new liquid-cooled Pack module fully enclosed heat dissipation device (hereinafter referred to as the "new structure") and the existing liquid-cooled Pack heat dissipation device (hereinafter referred to as the "existing structure") through comparative experiments. The test environment temperature is 36°C, and the test object is a cell module composed of 8 square lithium-ion cells of the same specification (single cell capacity 50Ah, nominal voltage 3.7V). The test conditions include a comparison of temperature changes when the module is running at full power and a comparison of the time it takes for the cell terminals to cool down to the target temperature.
[0050] I. Test Samples and Test Conditions
[0051] Current structure: It adopts a traditional flat heat sink. The modules are stacked and fixed to the heat sink by the bottom thermal adhesive. The heat sink only contacts the bottom of the module on one side. The two sides of the module are fixed by end plates and metal cable ties. The liquid cooling circulation system is only connected to the bottom heat sink.
[0052] New structure: The new structure adopts the fully enclosed heat dissipation structure described in Embodiment 1 above, including a bottom heat dissipation component, a fully enclosed heat dissipation component (aluminum plate material), a battery cell module and a liquid cooling circulation component. Each battery cell heating surface of the battery cell module is in contact with the fully enclosed heat dissipation component, and the gap is filled with thermally conductive adhesive. The liquid cooling circulation component connects the bottom heat dissipation component and the fully enclosed heat dissipation component to form a circulation loop.
[0053] Test equipment: high-power charge and discharge tester (accuracy ±0.5%), infrared thermometer (resolution 0.1℃), liquid chiller (temperature control range -20℃~80℃, flow rate adjustable).
[0054] II. Comparative Test of Temperature Changes over the Same Time Period
[0055] The control module operates at full power (10C discharge) while the liquid cooler is started (coolant inlet temperature set to 25℃, flow rate 5L / min). The temperature data of the cell terminals is recorded after 15 minutes.
[0056] Existing structure: such as Figure 3 Testing revealed that the temperature of the battery cell terminal in the middle of the module reached 32.4℃, while the temperatures of the battery cell terminals on both sides were 29.5℃ and 29.8℃, respectively. The maximum temperature difference between the battery cells was 2.9℃, indicating an uneven overall temperature distribution with significant heat accumulation in the middle battery cell.
[0057] New structure: such as Figure 4 The temperature of each cell terminal in the module is within the range of 29.1℃ to 29.4℃, with a maximum temperature difference of only 0.3℃. The temperature distribution is uniform and there is no obvious heat accumulation.
[0058] The comparison results show that, under the same operating time and liquid cooling conditions, the new structure achieves uniform heat conduction through full contact between the fully enclosed heat dissipation components and the battery cells, as well as reciprocating liquid cooling cycles, effectively solving the problem of excessively high temperature in the middle battery cells of the existing structure.
[0059] III. Comparison Test of Cooling Time under the Same Temperature Rise
[0060] First, charge both modules to full charge at 5C (at this point, the cell terminal temperature naturally rises to 40℃, and the temperature of each cell reaches thermal equilibrium with the external environment). Then, start the liquid cooler (with the same parameters as above) and record the working time of the liquid cooler when the cell terminal temperature drops to 30℃.
[0061] Existing structure: such as Figure 5After the liquid cooler worked continuously for 23 minutes, the temperature of the middle cell terminal of the module dropped to 30°C. The cells on both sides had reached the target temperature 5 to 8 minutes earlier. During the cooling process, the temperature difference between the cells was always maintained above 2°C.
[0062] New structure: such as Figure 6 After the liquid cooler worked for 11 minutes, the temperature of all the battery cell terminals dropped to 30°C simultaneously, with a uniform cooling rate and no significant time difference.
[0063] The comparison results show that the cooling efficiency of the new structure is significantly better than that of the existing structure. Through the synergistic effect of the fully enclosed heat dissipation components and the liquid cooling circulation components, the working time of the liquid cooling system is greatly shortened and the heat dissipation response speed is improved.
[0064] The comparative tests above show that the new liquid-cooled pack module's fully enclosed heat dissipation device performs better in terms of heat dissipation uniformity and efficiency. Through its fully enclosed heat dissipation design, reciprocating liquid cooling circulation, and filling with thermally conductive medium, it effectively solves the problems of large temperature difference between battery cells and slow heat dissipation in the existing structure, verifying the effectiveness of this structure in improving the heat dissipation performance of the liquid-cooled pack module.
[0065] In summary, this invention, through its structural design of a fully enclosed heat dissipation component in contact with the heating surface of each battery cell, combined with a liquid cooling circulation system connecting the bottom heat dissipation component and the fully enclosed heat dissipation component, significantly improves heat conduction speed, greatly shortens the working time of the liquid cooler, and effectively solves the problem of high temperature caused by heat accumulation in the middle battery cells, thereby achieving uniform temperature conduction of the battery cells. Simultaneously, the fully enclosed heat dissipation component replaces the traditional end plates and metal cable ties on both sides of the module, eliminating the need for equipment fixtures for module stacking, reducing the number of parts, simplifying production processes, and lowering equipment costs, thus offering the dual advantages of improved heat dissipation efficiency and optimized production processes.
[0066] The above are merely preferred embodiments of this utility model and do not constitute any limitation on this utility model. Any equivalent substitutions or modifications made by those skilled in the art to the technical solutions and contents disclosed in this utility model without departing from the scope of the technical solutions of this utility model shall still fall within the protection scope of this utility model.
Claims
1. A liquid-cooled pack module full-enclosure heat sink, characterized in that, This includes bottom heat dissipation components, fully enclosed heat dissipation components, battery cell modules, and liquid cooling circulation components; The fully enclosed heat dissipation component is located above the bottom heat dissipation component, the battery cell module is located inside the fully enclosed heat dissipation component, and the heating surface of each battery cell in the battery cell module is in contact with the fully enclosed heat dissipation component. The gap between the fully enclosed heat dissipation component and the battery cell is filled with a thermally conductive medium. The liquid cooling circulation assembly connects the bottom heat dissipation component and the fully enclosed heat dissipation component for coolant circulation; the fully enclosed heat dissipation component is provided with a coolant inlet and a coolant outlet, and the bottom heat dissipation component is provided with an interface adapted to the liquid cooling circulation assembly.
2. The liquid-cooled pack module full-enclosure heat sink of claim 1, wherein, The bottom heat dissipation component is provided with an installation and positioning structure for fixing the fully enclosed heat dissipation component and the battery cell module to the bottom heat dissipation component.
3. The liquid-cooled pack module full-enclosure heat sink of claim 1, wherein, The thermally conductive medium is thermally conductive adhesive or thermally conductive silicone grease.
4. The liquid-cooled pack module full-enclosure heat sink of claim 1, wherein, The liquid cooling circulation assembly includes an inlet pipe and an outlet pipe; One end of the liquid inlet pipe is connected to the coolant inlet, and the other end is connected to the liquid inlet of the bottom heat dissipation component. One end of the liquid outlet pipe is connected to the coolant outlet, and the other end is connected to the liquid outlet of the bottom heat dissipation component, forming a circulation loop.
5. The liquid-cooled pack module full-enclosure heat sink of claim 1, wherein, The fully enclosed heat dissipation component is an aluminum plate, copper plate, or aluminum alloy plate.
6. The liquid-cooled pack module full-enclosure heat sink of claim 1, wherein, The battery cell module includes an electrical connection structure located on the top of the battery cell module, which is used to realize electrical connection between the battery cells.
7. The liquid-cooled pack module full-enclosure heat sink of claim 1, wherein, Both the bottom heat dissipation component and the fully enclosed heat dissipation component are equipped with flow channels to guide the flow of coolant.
8. The liquid-cooled pack module fully enclosed heat dissipation device according to claim 1, characterized in that, The coolant inlet and coolant outlet are arranged side by side on the same edge of the fully enclosed heat dissipation component, and the fully enclosed heat dissipation component has a partition structure inside. The partition structure divides the coolant flow path into an inlet channel extending from the coolant inlet to the opposite side and an outlet channel returning from the opposite side to the coolant outlet. The inlet channel and the outlet channel are interconnected through a guide groove provided in the gap of the battery cell module to form a reciprocating flow loop.
9. The liquid-cooled packmod full-enclosure heat sink of claim 1, wherein, The outline of the fully enclosed heat dissipation component is adapted to the shape of the battery cell module, and is used to completely enclose the battery cell module.
10. The liquid-cooled pack module full-enclosure heat sink of claim 1, wherein, The bottom heat dissipation component and the fully enclosed heat dissipation component are fixed together by a detachable connection structure, which includes bolt connection, snap-fit connection or slot connection.