A water-cooled separator and an electric cell testing system comprising the same
By designing a water-cooled baffle, heat is conducted through internal channels and gas is expelled under extreme conditions, solving the problem of low thermal conductivity of traditional baffles and achieving lower cell temperature and improved safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI XUANYI NEW ENERGY DEV CO LTD
- Filing Date
- 2025-06-13
- Publication Date
- 2026-07-24
AI Technical Summary
The separators used in traditional lithium battery cell testing have low thermal conductivity, which leads to heat accumulation, affecting lifespan and performance, and poses safety hazards in extreme cases.
It adopts a water-cooled baffle, which includes an aluminum or copper body with internal flow channels, a compression composite plate and a positioning and fixing structure. Heat is conducted through the cooling water flow channels, and gas is discharged in extreme cases to avoid damage to the baffle, thus enhancing safety.
It effectively reduces cell temperature, minimizes heat accumulation, prevents cell damage and short circuits, improves safety and stability, and ensures long-term stable contact and heat dissipation of the cell.
Smart Images
Figure CN224554395U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lithium battery testing technology, and in particular to a water-cooled separator and a cell testing system including the separator. Background Technology
[0002] With the continuous development of electronic devices and the increasing demand for energy storage, lithium batteries, as a high-energy-density energy storage device, are finding increasingly wider applications, covering multiple fields from portable electronic devices to electric vehicles and energy storage systems. However, in the practical application of lithium batteries, cell thermal management and safety remain critical issues.
[0003] In the design and development of lithium battery modules, the development of individual cells and the module level are usually carried out simultaneously to ensure the performance and safety of the cells after assembly.
[0004] Traditional battery cell testing separators typically use organic materials with low thermal conductivity. Their main purpose is to form a thermal barrier between the cells, preventing the spread of thermal runaway caused by overheating. They also possess a certain degree of elasticity to compensate for cell expansion during use, avoiding performance loss due to insufficient expansion space. However, in practical applications, the low thermal conductivity of these traditional separators leads to significant heat accumulation after cell assembly. This results in cells being subjected to prolonged high-temperature testing, reducing their lifespan and performance, affecting the accuracy of test results, and ultimately negatively impacting the research and optimization of cells and modules.
[0005] Meanwhile, while traditional separator designs provide some elastic compensation when faced with cell expansion, in extreme cases, excessive cell expansion force may lead to serious problems such as separator structure damage and short circuits between cells, posing certain safety hazards.
[0006] Therefore, there is an urgent need for a water-cooled partition that can effectively solve the above problems and a cell testing system that includes it. Utility Model Content
[0007] The purpose of this invention is to address the shortcomings of existing technologies by providing a water-cooled separator and a cell testing system including the separator.
[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0009] The first aspect of this utility model is to provide a water-cooled partition, comprising: a water-cooled partition body, two compression composite plates disposed on both sides of the water-cooled partition body, and a positioning and fixing structure for fixing the water-cooled partition body and the two compression composite plates; wherein...
[0010] The water-cooled baffle body has an internal flow channel for cooling water to circulate. One end of the flow channel is connected to the water inlet connector, and the other end of the flow channel is connected to the water return connector.
[0011] The compression composite plate is composed of a metal shell and an elastic heat-conducting layer. The elastic heat-conducting layer is disposed in the middle of the side of the metal shell near the main body of the water-cooled partition. The area of the metal shell near the main body of the water-cooled partition where the elastic heat-conducting layer is not disposed forms a buffer space. An exhaust groove is provided on the side wall of the metal shell, and the exhaust groove is connected to the buffer space.
[0012] The positioning and fixing structure includes: countersunk screws; positioning holes are provided at the four corners of the metal shell layer and the four corners of the water-cooled partition body, and the countersunk screws pass through the positioning holes to fix the two compression composite plates and the water-cooled partition body to each other.
[0013] Preferably, the main body of the water-cooled partition is made of aluminum or copper.
[0014] Preferably, the thickness of the water-cooled partition body is 2mm-5mm.
[0015] Preferably, the flow channels are arranged in an "S" shape inside the water-cooled baffle body.
[0016] Preferably, the cross-section of the flow channel is circular or elliptical.
[0017] Preferably, the inner diameter of the flow channel is 2mm-3mm.
[0018] Preferably, the total length of the flow channel is 80mm-120mm.
[0019] Preferably, both the inlet connector and the return connector are provided with a narrowed section that matches the inner diameter of the flow channel.
[0020] Preferably, the length of the constricted section is 10mm-15mm.
[0021] Preferably, a sealing ring is provided between the constricted section and the flow channel.
[0022] Preferably, the sealing ring is made of high-temperature resistant rubber material.
[0023] Preferably, the thickness of the sealing ring is 2mm-3mm.
[0024] Preferably, the metal shell is made of aluminum alloy or copper alloy.
[0025] Preferably, the metal shell has a thin-walled structure.
[0026] Preferably, the wall thickness of the metal shell is 0.3mm-0.5mm.
[0027] Preferably, the metal shell layer has flanges on all four sides of the side closest to the water-cooled partition body, the vent groove is opened on the flange, and the side where the vent groove is located is different from the side where the water inlet connector is located and / or the side where the water return connector is located.
[0028] Preferably, the width of the exhaust groove is 1mm-2mm.
[0029] Preferably, the length of the exhaust groove is 5mm-8mm.
[0030] Preferably, the elastic thermally conductive layer is made of silicone thermally conductive material or polyurethane thermally conductive material.
[0031] Preferably, the thickness of the elastic thermally conductive layer is 3mm-5mm.
[0032] Preferably, the Shore A hardness of the elastic thermally conductive layer is 30-40.
[0033] Preferably, the elastic thermally conductive layer is fixed to the metal shell layer by adhesive.
[0034] Preferably, the diameter of the positioning hole is 5mm-8mm.
[0035] Preferably, the countersunk screw has a length of 10mm-15mm.
[0036] Preferably, the positioning and fixing structure further includes: a washer; wherein,
[0037] The washer is placed on the countersunk screw to prevent it from loosening.
[0038] Preferably, the gasket is made of high-temperature resistant rubber material.
[0039] Preferably, the thickness of the washer is 1mm-2mm.
[0040] A second aspect of this utility model is to provide a battery cell testing system, comprising: a plurality of battery cells and a plurality of water-cooled separators; wherein...
[0041] The water-cooled partition is as described above;
[0042] A plurality of the aforementioned battery cells and a plurality of the aforementioned water-cooled baffles are arranged sequentially at intervals.
[0043] The present invention adopts the above technical solution and has the following technical effects compared with the prior art:
[0044] The water-cooled baffle of this utility model has an aluminum or copper water-cooled baffle body in the middle. The "S"-shaped flow channel opened inside can efficiently conduct heat from the battery cell. With the help of an external water-cooling device, it can achieve rapid heat exchange, effectively reduce the temperature of the battery cell, reduce heat accumulation, and avoid performance and life reduction caused by long-term high temperature.
[0045] The compression composite plates on both sides can buffer the expansion of the battery cell, provide expansion space for the battery cell, prevent battery cell damage and short circuit, and reduce the risk of thermal runaway; at the same time, the exhaust groove can discharge the elastic heat-conducting layer under extreme compression, avoid damage to the separator, and enhance safety.
[0046] In addition, the metal shell and the elastic thermal conductive layer are fixed with adhesive, and the water-cooled partition body and the compression composite plate are fixed with countersunk screws to ensure the stability and integrity of the water-cooled partition structure, prevent misalignment and separation due to factors such as cell vibration and thermal expansion, and ensure long-term stable contact and heat dissipation between the water-cooled partition and the cell. Attached Figure Description
[0047] Figure 1 This is an exploded structural diagram of the water-cooled partition in this utility model;
[0048] Figure 2 This is a perspective structural diagram of the water-cooled partition in this utility model;
[0049] The reference numerals in the figures include:
[0050] Water-cooled baffle body 1; flow channel 11; water inlet connector 12; water return connector 13; metal shell 21; exhaust groove 211; elastic heat-conducting layer 22; countersunk screw 3. Detailed Implementation
[0051] The specific embodiments of this utility model will be described in detail below.
[0052] Unless otherwise defined, the technical or scientific terms used in the claims and description shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.
[0053] The word "comprising" or similar terms used in this utility model patent application specification and claims mean that the objects preceding "comprising" include the objects listed after "comprising" or their equivalents, and do not exclude other objects.
[0054] The numerical values mentioned in this invention include all values increasing one unit at a time from low to high, assuming that there is at least a two-unit interval between any lower and higher value. For example, if a component quantity or a physical quantity is said to be better from 1 to 100, 10 to 90, and 20 to 80, it means that values such as 5 to 95, 14 to 76, 23 to 67, 32 to 58, and 41 to 49 are clearly listed in this specification; for values less than 1, 0.0001, 0.001, 0.01, or 0.1 are considered suitable units. The foregoing examples are for illustrative purposes only; in practice, all combinations of values between the lowest and highest listed values are considered to be clearly listed in this specification in a similar manner.
[0055] Example 1
[0056] like Figure 1-2 As shown, this embodiment provides a water-cooled partition, including: a water-cooled partition body 1, two compressed composite plates disposed on the front and rear sides of the water-cooled partition body 1, and a positioning and fixing structure for fixing the water-cooled partition body 1 and the two compressed composite plates; wherein,
[0057] The water-cooled baffle body 1 is made of a high thermal conductivity metal material. The interior of the water-cooled baffle body 1 is provided with a flow channel 11 for cooling water to flow. The flow channel 11 is arranged in an "S" shape inside the water-cooled baffle body 1 to increase the contact area of the cooling water. The cross-section of the flow channel 11 is circular. One end of the flow channel 11 is connected to the water inlet connector 12, and the other end of the flow channel 11 is connected to the water return connector 13. Both the water inlet connector 12 and the water return connector 13 are provided with a constriction section that matches the inner diameter of the flow channel 11. A sealing ring (not shown in the figure) is provided between the constriction section and the flow channel 11.
[0058] The compression composite plate is composed of a metal shell layer 21 and an elastic heat-conducting layer 22;
[0059] The metal shell 21 is a thin-walled structure. The metal shell 21 has flanges on all four sides of the side close to the water-cooled partition body 1. Vent grooves 211 are opened on the flanges on both the left and right sides. Obviously, the side where the vent grooves 211 are located is different from the side where the water inlet connector 12 is located or / and the side where the water return connector 13 is located.
[0060] The elastic thermally conductive layer 22 is adhesively fixed to the middle of the side of the metal shell 21 near the water-cooled partition body 1. The area of the metal shell 21 near the water-cooled partition body 1 where the elastic thermally conductive layer 22 is not provided (i.e., the upper and lower sides of the elastic thermally conductive layer 22) forms a buffer space. The buffer space is connected to the exhaust groove 211. When the water-cooled partition deforms due to the expansion of the battery cell, the gas in the buffer space is discharged through the exhaust groove 211. In some extreme cases, the elastic thermally conductive layer 22 can be discharged through the exhaust groove 211 to avoid damage to the partition and enhance safety.
[0061] The positioning and fixing structure includes: countersunk screw 3 and washer (not shown in the figure);
[0062] The metal shell 21 has positioning holes at its four corners that mate with the four corners of the water-cooled partition body 1. The countersunk screws 3 pass through the positioning holes to fix the two compression composite plates and the water-cooled partition body 1. The washers are placed on the countersunk screws 3 to prevent loosening due to factors such as cell vibration and thermal expansion.
[0063] In some other preferred embodiments, the cross-section of the flow channel 11 is elliptical.
[0064] In some preferred embodiments, the water-cooled partition body 1 is made of aluminum.
[0065] In some other preferred embodiments, the water-cooled partition body 1 is made of copper.
[0066] In some preferred embodiments, the thickness of the water-cooled partition body 1 is 2mm-5mm.
[0067] In a more preferred embodiment, the thickness of the water-cooled partition body 1 is 4 mm.
[0068] In some preferred embodiments, the inner diameter of the flow channel 11 is 2mm-3mm.
[0069] In a more preferred embodiment, the inner diameter of the flow channel 11 is 2 mm.
[0070] In some preferred embodiments, the total length of the flow channel 11 is 80mm-120mm.
[0071] In a more preferred embodiment, the total length of the flow channel 11 is 100 mm.
[0072] In some preferred embodiments, the length of the constricted section is 10mm-15mm.
[0073] In a more preferred embodiment, the length of the constricted section is 10 mm.
[0074] In some preferred embodiments, the sealing ring is made of high-temperature resistant rubber material.
[0075] In some preferred embodiments, the thickness of the sealing ring is 2mm-3mm.
[0076] In a more preferred embodiment, the thickness of the sealing ring is 2 mm.
[0077] In some preferred embodiments, the metal shell 21 is made of aluminum alloy.
[0078] In some other preferred embodiments, the metal shell 21 is made of a copper alloy.
[0079] In some preferred embodiments, the wall thickness of the metal shell 21 is 0.3 mm to 0.5 mm.
[0080] In a more preferred embodiment, the wall thickness of the metal shell 21 is 0.3 mm.
[0081] In some preferred embodiments, the width of the exhaust groove 211 is 1mm-2mm.
[0082] In a more preferred embodiment, the width of the exhaust groove 211 is 2 mm.
[0083] In some preferred embodiments, the length of the exhaust groove 211 is 5mm-8mm.
[0084] In a more preferred embodiment, the length of the exhaust groove 211 is 8 mm.
[0085] In some preferred embodiments, the elastic thermally conductive layer 22 is made of silicone thermally conductive material. In other preferred embodiments, the elastic thermally conductive layer 22 is made of polyurethane thermally conductive material. In some preferred embodiments, the thickness of the elastic thermally conductive layer 22 is 3mm-5mm.
[0086] In a more preferred embodiment, the thickness of the elastic thermally conductive layer 22 is 3 mm.
[0087] In some preferred embodiments, the Shore A hardness of the elastic thermally conductive layer 22 is 30-40. In a more preferred embodiment, the Shore A hardness of the elastic thermally conductive layer 22 is 30. In some preferred embodiments, the diameter of the positioning hole is 5mm-8mm.
[0088] In a more preferred embodiment, the diameter of the positioning hole is 5 mm.
[0089] In some preferred embodiments, the countersunk screw 3 has a length of 10mm-15mm.
[0090] In a more preferred embodiment, the countersunk screw 3 has a length of 10 mm.
[0091] In some preferred embodiments, the gasket is made of high-temperature resistant rubber material.
[0092] In some preferred embodiments, the thickness of the gasket is 1mm-2mm.
[0093] In a more preferred embodiment, the thickness of the washer is 1 mm.
[0094] Example 2
[0095] This embodiment provides a battery cell testing system, including: a plurality of battery cells and a plurality of water-cooled separators as described in Embodiment 1;
[0096] in,
[0097] A plurality of the aforementioned battery cells and a plurality of the aforementioned water-cooled baffles are arranged sequentially at intervals.
[0098] As described in Example 1, the water-cooled partition has an aluminum or copper main body in the middle. The "S"-shaped flow channel inside can efficiently conduct heat from the battery cell. Combined with an external water-cooling device, it can achieve rapid heat exchange, effectively reduce the temperature of the battery cell, reduce heat accumulation, and avoid performance and life reduction caused by long-term high temperature.
[0099] The compression composite plates on both sides can buffer the expansion of the battery cell, provide expansion space for the battery cell, prevent battery cell damage and short circuit, and reduce the risk of thermal runaway; at the same time, the exhaust groove can discharge the elastic heat-conducting layer under extreme compression, avoid damage to the separator, and enhance safety.
[0100] In addition, the metal shell and the elastic thermal conductive layer are fixed with adhesive, and the water-cooled partition body and the compression composite plate are fixed with countersunk screws to ensure the stability and integrity of the water-cooled partition structure, prevent misalignment and separation due to factors such as cell vibration and thermal expansion, and ensure long-term stable contact and heat dissipation between the water-cooled partition and the cell.
[0101] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A water-cooled partition, characterized in that, include: The system comprises a water-cooled partition body (1), two compression composite plates disposed on both sides of the water-cooled partition body (1), and a positioning and fixing structure for fixing the water-cooled partition body (1) and the two compression composite plates; wherein, The water-cooled baffle body (1) has a flow channel (11) for cooling water to flow through. One end of the flow channel (11) is connected to the water inlet connector (12), and the other end of the flow channel (11) is connected to the water return connector (13). The compression composite plate is composed of a metal shell (21) and an elastic heat-conducting layer (22). The elastic heat-conducting layer (22) is disposed in the middle of the side of the metal shell (21) near the water-cooled partition body (1). The area of the metal shell (21) near the water-cooled partition body (1) where the elastic heat-conducting layer (22) is not disposed forms a buffer space. An exhaust groove (211) is provided on the side wall of the metal shell (21), and the exhaust groove (211) is connected to the buffer space. The positioning and fixing structure includes: countersunk screws (3); positioning holes are provided at the four corners of the metal shell (21) and the four corners of the water-cooled partition body (1), and the countersunk screws (3) pass through the positioning holes to fix the two compression composite plates and the water-cooled partition body (1) to each other.
2. The water-cooled partition according to claim 1, characterized in that, The flow channels (11) are arranged in an "S" shape inside the water-cooled baffle body (1).
3. The water-cooled partition according to claim 1, characterized in that, The cross-section of the flow channel (11) is circular or elliptical.
4. The water-cooled partition according to claim 1, characterized in that, Both the inlet connector (12) and the return connector (13) are provided with a narrowed section that matches the inner diameter of the flow channel (11).
5. The water-cooled partition according to claim 4, characterized in that, A sealing ring is provided between the constriction section and the flow channel (11).
6. The water-cooled partition according to claim 1, characterized in that, The metal shell (21) has a thin-walled structure.
7. The water-cooled partition according to claim 1 or 6, characterized in that, The metal shell (21) has flanges on all four sides of the side closest to the water-cooled baffle body (1). The exhaust groove (211) is opened on the flange, and the side where the exhaust groove (211) is located is different from the side where the water inlet connector (12) is located or / and the side where the water return connector (13) is located.
8. The water-cooled partition according to claim 1, characterized in that, The elastic thermally conductive layer (22) is fixed to the metal shell layer (21) by adhesive.
9. The water-cooled partition according to claim 1, characterized in that, The positioning and fixing structure further includes a washer; wherein the washer is disposed on the countersunk screw (3) to prevent it from loosening.
10. A battery cell testing system, characterized in that, include: Several battery cells and several water-cooled partitions; among them, The water-cooled partition is as described in any one of claims 1-9; A plurality of the aforementioned battery cells and a plurality of the aforementioned water-cooled baffles are arranged sequentially at intervals.