Battery cooling structure

Abstract

The utility model relates to battery technical field provides a battery cooling structure, battery cooling structure includes: liquid cooling board is arranged in one side of first battery module and second battery module, and the first cooling channel is formed in, cooling set piece is used for with the heat conduction of electrically conductive part, and the second cooling channel is formed in, liquid inlet pipe is linked together with first cooling channel and second cooling channel, liquid outlet pipe is linked together with first cooling channel and second cooling channel. The utility model provides battery cooling structure, can utilize liquid inlet pipe to complete the liquid inlet of liquid cooling board and cooling set piece simultaneously, utilizes liquid outlet pipe to complete the liquid outlet of liquid cooling board and cooling set piece simultaneously, makes liquid cooling board and cooling set piece respectively to first battery module, second battery module and electrically conductive part carry out the heat dissipation, can in the high rate charging and discharging process of battery module, effectively reduce the temperature of first battery module, second battery module and electrically conductive part, avoid the performance decline, the shortened life etc. due to overheating.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery cooling structure. Background Technology

[0002] To achieve fast charging for electric vehicles, electric vehicles and their batteries are constantly evolving towards higher voltage and faster charging rates. Against this backdrop, the fast charging current has also risen rapidly, even exceeding 600A, and shows a trend of further increase. However, the increase in current has brought about heat dissipation problems, especially placing increasingly stringent requirements on the heat dissipation of battery cells and electrical connectors.

[0003] In the battery structure, the electrode groups, the copper busbars connecting them, and the shaped aluminum busbars connected to them generate significant heat when high current flows. This heat generation has a severely adverse effect on the temperature of the tightly connected cell ends, leading to excessively high cell end temperatures. This phenomenon seriously restricts further improvements in the fast charging rate of the cells and limits the development of battery packs in terms of fast charging performance. Utility Model Content

[0004] This invention provides a battery cooling structure to solve the problem that the electrode groups and conductive components between the electrode groups in existing batteries generate a lot of heat when high current passes through, resulting in excessively high temperature at the end of the battery cell.

[0005] This utility model provides a battery cooling structure, applied to a battery including: a first battery module, a second battery module and a conductive component, wherein the first battery module is used to electrically connect to the second battery module through the conductive component;

[0006] The battery cooling structure includes:

[0007] A liquid cooling plate is disposed on one side of the first battery module and the second battery module, and a first cooling channel is formed therein;

[0008] The cooling kit is thermally connected to the conductive component and has a second cooling channel formed inside.

[0009] The liquid inlet pipe is connected to the first cooling channel and the second cooling channel;

[0010] The liquid outlet pipe is connected to the first cooling channel and the second cooling channel.

[0011] According to the battery cooling structure provided by this utility model, the liquid inlet pipe includes:

[0012] The liquid inlet main pipe is connected at one end to the liquid inlet of the first cooling channel and at the other end to the input of the cooling system.

[0013] The liquid inlet branch pipe is connected at one end to the main liquid inlet pipe and at the other end to the liquid inlet of the second cooling channel.

[0014] According to the battery cooling structure provided by this utility model, the liquid outlet pipe includes:

[0015] The liquid outlet pipe is connected at one end to the liquid outlet of the first cooling channel and at the other end to the output end of the cooling system.

[0016] The liquid outlet branch pipe is connected at one end to the main liquid outlet pipe and at the other end to the liquid outlet of the second cooling channel.

[0017] According to the battery cooling structure provided by this utility model, the ratio of the diameter of the liquid inlet branch pipe to the diameter of the liquid inlet main pipe is 0.2 to 0.4.

[0018] The ratio of the diameter of the outlet branch pipe to the diameter of the outlet main pipe is 0.2 to 0.4.

[0019] According to the present invention, a battery cooling structure is provided, wherein the cooling kit is an insulating liquid sleeve, which is sleeved on the conductive component.

[0020] According to the present invention, a battery cooling structure further includes: an insulating heat dissipation layer, at least a portion of which is sleeved over the conductive component;

[0021] The insulating liquid sleeve is fitted over the conductive component through the insulating heat dissipation layer.

[0022] According to the present invention, a battery cooling structure is provided, wherein the cooling kit includes: a first extension, a second extension, and a connecting portion;

[0023] The first extension is connected to the second extension via the connecting portion;

[0024] The first extension and the second extension are spaced apart, and a clamping space for clamping the conductive element is formed between them;

[0025] At least a portion of the second cooling channel is located in the first extension and / or the second extension.

[0026] According to the battery cooling structure provided by this utility model, the second cooling channel includes: a heat exchange region and a flow region;

[0027] The connecting part is provided with a kit liquid inlet and a kit liquid outlet on the outside, and the flow area is formed inside. The kit liquid inlet is connected to the liquid inlet pipe, and the kit liquid outlet is connected to the liquid outlet pipe.

[0028] The heat exchange region is formed within the first extension and / or the second extension.

[0029] According to the battery cooling structure provided by this utility model, the first extension is inclined toward a side away from the second extension, and the inclination angle of the first extension is 0.5 degrees to 2.5 degrees.

[0030] And / or, the second extension is inclined toward a side away from the first extension, and the inclination angle of the second extension is 0.5 degrees to 2.5 degrees.

[0031] According to the present invention, a battery cooling structure is provided in the heat exchange area, wherein a serpentine flow channel is provided;

[0032] The serpentine flow channel includes: a plurality of parallel flow channel segments, and connecting segments that alternately connect the ends of adjacent flow channel segments to form a continuously bent U-shaped path within the first extension and / or the second extension.

[0033] The battery cooling structure provided by this utility model can simultaneously supply liquid to the liquid cooling plate and the cooling kit using the inlet pipe, and simultaneously discharge liquid to the liquid cooling plate and the cooling kit using the outlet pipe. This allows the liquid cooling plate and the cooling kit to dissipate heat from the first battery module, the second battery module, and the conductive components, respectively. During high-rate charging and discharging of the battery, it can effectively reduce the temperature of the first battery module, the second battery module, and the conductive components, avoiding performance degradation, shortened lifespan, and safety hazards caused by overheating, thereby improving the overall performance and reliability of the battery. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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 from these drawings without creative effort.

[0035] Figure 1 This is a three-dimensional structural diagram of the battery cooling structure provided by this utility model.

[0036] Figure 2 This is a partial structural diagram of the battery cooling structure provided by this utility model.

[0037] Figure 3 This is a three-dimensional structural diagram of the cooling kit provided by this utility model.

[0038] Figure 4 This is one of the side views of the cooling kit provided by this utility model.

[0039] Figure 5 This is the second side view of the cooling kit provided by this utility model.

[0040] Figure 6 yes Figure 5 A schematic diagram of section AA.

[0041] Figure 7 This is a front view of the cooling kit provided by this utility model.

[0042] Figure 8 yes Figure 7 A schematic diagram of the BB section.

[0043] Figure label:

[0044] 1. Battery cooling structure; 11. Liquid cooling plate; 12. Cooling kit; 121. Second cooling channel; 1211. Heat exchange area; 1212. Flow area; 12121. Liquid inlet flow area; 12122. Liquid outlet flow area; 1213. Flow channel inlet; 1214. Flow channel outlet; 122. First extension; 123. Second extension; 124. Connecting part; 1241. Kit inlet; 1 242. Liquid outlet of the kit; 125. Bolt and nut; 126. Clamping space; 13. Liquid inlet pipe; 131. Main liquid inlet pipe; 132. Branch liquid inlet pipe; 133. Liquid inlet tee; 14. Liquid outlet pipe; 141. Main liquid outlet pipe; 142. Branch liquid outlet pipe; 143. Liquid outlet tee; 2. First battery module; 21. End cell; 22. Irregularly shaped battery plate; 3. Second battery module; 4. Conductive component; 5. Insulating heat dissipation layer. Detailed Implementation

[0045] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0047] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0048] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0049] In traditional low-rate charging platforms, the crossover copper busbar design only needs to meet the overcurrent capacity. Because the fast-charging current is relatively small, the heat generated by the crossover copper busbar and the connected irregularly shaped aluminum busbar has little impact on the end electrode assembly and can be disregarded. However, with the rapid increase in fast-charging current to 600A and even higher, testing and simulation analysis have shown that the temperature at the same location in the middle of the end electrode assembly cover plate is about 5-8°C higher than other conventional middle electrode assemblies under fast-charging conditions due to the heat generated by the welding resistance of the crossover copper busbar and the connected irregularly shaped aluminum busbar. This severely restricts the improvement of the fast-charging rate. Therefore, the heat dissipation problem of the crossover copper busbar and the connected irregularly shaped aluminum busbar must be considered.

[0050] To solve the above problems, such as Figures 1 to 2As shown, this application provides a battery cooling structure 1. This battery cooling structure 1 is applied to a battery including a first battery module 2, a second battery module 3, and a conductive element 4. The first battery module 2 is electrically connected to the second battery module 3 via the conductive element 4. The battery cooling structure 1 includes: a liquid cooling plate 11, a cooling kit 12, an inlet pipe 13, and an outlet pipe 14. The liquid cooling plate 11 is disposed on one side of the first battery module 2 and the second battery module 3, and has a first cooling channel formed therein. The cooling kit 12 is used for thermal contact with the conductive element 4, and has a second cooling channel 121 formed therein. The inlet pipe 13 communicates with the first cooling channel and the second cooling channel 121. The outlet pipe 14 communicates with both the first cooling channel and the second cooling channel 121.

[0051] In this embodiment, the first cooling channel inside the liquid cooling plate 11 is used for heat exchange between the first battery module 2 and the second battery module 3, removing the heat generated by the first battery module 2 and the second battery module 3. The cooling kit 12 can achieve thermal conductivity with the conductive component 4, effectively transferring the heat generated by the conductive component 4. It has a second cooling channel 121 inside to dissipate heat from the conductive component 4. The liquid inlet pipe 13 is connected to the first cooling channel and the second cooling channel 121 respectively, ensuring that the coolant can flow smoothly into each part that needs heat dissipation. The liquid outlet pipe 14 is connected to the liquid outlet end of the liquid cooling plate 11 and the cooling kit 12, used to discharge the coolant after absorbing heat, completing a cooling cycle so that the coolant can be recycled in the system to continuously remove heat.

[0052] When the battery is in a high-rate charge / discharge state, the first battery module 2, the second battery module 3, and the conductive component 4 generate a large amount of heat. At this time, coolant enters both the first cooling channel of the liquid cooling plate 11 and the second cooling channel 121 of the cooling kit 12 through the inlet pipe 13. In the liquid cooling plate 11, the coolant flows along the first cooling channel, exchanging heat with the first battery module 2 and the second battery module 3, absorbing the heat generated by the electrode assembly, and effectively reducing the temperature of the electrode assembly. At the same time, in the cooling kit 12, the coolant flows in the second cooling channel 121, making close contact with the conductive component 4, quickly carrying away the heat generated by the conductive component 4, preventing the conductive component 4 from overheating and causing performance problems or even damage. After absorbing heat, the coolant temperature rises, and it is then discharged through the outlet pipe 14 into an external cooling system (such as a radiator) for heat dissipation and cooling, before circulating back to the inlet pipe 13 to continue the next cooling cycle. This process is repeated to achieve heat dissipation for the battery.

[0053] The battery cooling structure 1 provided by this utility model can simultaneously supply liquid to the liquid cooling plate 11 and the cooling kit 12 via the inlet pipe 13, and simultaneously discharge liquid to the liquid cooling plate 11 and the cooling kit 12 via the outlet pipe. This allows the liquid cooling plate 11 and the cooling kit 12 to dissipate heat from the first battery module 2, the second battery module 3, and the conductive component 4, respectively. During high-rate charging and discharging of the battery, this effectively reduces the temperature of the first battery module 2, the second battery module 3, and the conductive component 4, avoiding performance degradation, shortened lifespan, and safety hazards caused by overheating, thus improving the overall performance and reliability of the battery. Since both locations share a single inlet pipe 13 and outlet pipe 14, it significantly saves layout space, simplifies the control strategy, and reduces costs.

[0054] In some embodiments, such as Figure 1 and Figure 2 As shown, the liquid inlet pipe 13 includes a main liquid inlet pipe 131 and a branch liquid inlet pipe 132. One end of the main liquid inlet pipe 131 is connected to the liquid inlet of the first cooling channel, and the other end is connected to the input end of the cooling system; one end of the branch liquid inlet pipe 132 is connected to the main liquid inlet pipe 131, and the other end is connected to the liquid inlet of the second cooling channel 121. A section of the main liquid inlet pipe 131 can be connected to the branch liquid inlet pipe 132 via a liquid inlet tee 133.

[0055] After flowing out from the input end of the cooling system, the coolant first enters the first cooling channel of the liquid cooling plate 11 through the main inlet pipe 131. At the same time, a portion of the coolant flows into the second cooling channel 121 of the cooling kit 12 through the inlet branch pipe 132, thereby achieving simultaneous supply of coolant to both the liquid cooling plate 11 and the cooling kit 12. This ensures that the coolant can efficiently reach all parts that require heat dissipation, further optimizing the cooling effect and ensuring that the temperature of each component is effectively controlled during high-rate charging and discharging of the battery, thus improving the overall performance and reliability of the battery.

[0056] Accordingly, such as Figure 1 and Figure 2 As shown, the liquid outlet pipe 14 includes a main liquid outlet pipe 141 and a branch liquid outlet pipe 142. One end of the main liquid outlet pipe 141 is connected to the liquid outlet of the first cooling channel, and the other end is connected to the output end of the cooling system; one end of the branch liquid outlet pipe 142 is connected to the main liquid outlet pipe 141, and the other end is connected to the liquid outlet of the second cooling channel 121. A section of the main liquid outlet pipe 141 can be connected to the branch liquid outlet pipe 142 via a tee 143.

[0057] In this embodiment, the function of the main outlet pipe 141 is to collect the coolant flowing from the first cooling channel of the liquid cooling plate 11, which has absorbed heat from the first battery module 2 and the second battery module 3, and then transport it back to the output end of the cooling system. In this way, the coolant can undergo heat exchange within the cooling system, releasing heat and being recycled again. The branch outlet pipe 142 is used to guide the coolant flowing from the second cooling channel 121 of the cooling kit 12, which has absorbed heat from the conductive component 4, to the main outlet pipe 141. In this way, the branch outlet pipe 142 also allows the heat in the cooling kit 12 to be effectively transported back to the cooling system through the main outlet pipe 141.

[0058] In some embodiments, such as Figure 1 and Figure 2 As shown, the ratio of the diameter of the inlet branch pipe 132 to the diameter of the inlet main pipe 131 is 0.2 to 0.4. The ratio of the diameter of the outlet branch pipe 142 to the diameter of the outlet main pipe 141 is 0.2 to 0.4.

[0059] Specifically, the main inlet pipe 131 and the main outlet pipe 141, as the main channels for coolant delivery, need to have sufficient diameter to ensure that the coolant can smoothly flow into and out of each cooling component at a certain flow rate and velocity. The inlet branch pipe 132 and the outlet branch pipe 142 mainly provide and discharge coolant channels for the cooling kit 12. Since the size of the cooling kit 12 and the required coolant volume are relatively small, if the diameter of the branch pipes is too large, the coolant flow rate in the branch pipes may be too slow, affecting the cooling effect and causing uneven distribution of coolant in the system. Setting the diameter of the inlet branch pipe 132 and the outlet branch pipe 142 to be between 0.2 and 0.4 of the main pipe diameter allows for reasonable control of the flow rate and velocity of the branch pipes, ensuring that the coolant flows into and out of the cooling kit 12 in a suitable manner, thereby ensuring that the cooling kit 12 can effectively dissipate heat from the conductive component 4.

[0060] Furthermore, during the operation of the cooling system, the resistance of various components affects the flow characteristics of the coolant. By reasonably setting the diameter ratio of the branch pipe and the main pipe, the resistance of the inlet branch pipe 132 and the outlet branch pipe 142 can be matched with the resistance of the inlet main pipe 131 and the outlet main pipe 141. This avoids situations where the coolant flow is too high or too low in certain parts due to excessive resistance differences, ensuring that the coolant can be evenly distributed throughout the cooling system and improving the heat dissipation efficiency and performance of the entire battery cooling structure 1.

[0061] In some embodiments, such as Figure 1 and Figure 2 As shown, the cooling kit 12 is an insulating liquid sleeve, which is fitted over the conductive component 4.

[0062] In this embodiment, as Figure 2As shown, the end cells 21 of the first battery module 2 or the second battery module 3 are welded together using shaped contact plates 22. The conductive component 4 is typically a bridging copper busbar. The shaped contact plates 22 are welded to the bridging copper busbar, which is then further welded and fixed to the end plate. During battery operation, these welded points easily generate heat due to resistance, becoming the main source of high temperatures at the cell end. Because the space occupied by the shaped contact plates 22 is relatively small, cooling is difficult. Therefore, cooling is applied to a large area of ​​the bridging copper busbar to achieve more efficient heat dissipation.

[0063] The insulating fluid jacket is constructed to match the shape of the jumper busbar, typically employing a U-shaped structure to fully conform to its shape. This ensures ample contact between the coolant and the jumper busbar, facilitating efficient heat exchange. The insulating fluid jacket is made of plastic, which not only increases the insulation resistance between the jumper busbar and the coolant, preventing electrical faults such as short circuits, but also ensures the safety of the cooling system. Simultaneously, it effectively solves the heat dissipation problem of the jumper busbar without significantly increasing the overall battery size, reducing its temperature and thus minimizing performance degradation, shortened lifespan, and safety hazards caused by overheating. This improves the stability and reliability of the battery during high-rate charge and discharge processes.

[0064] To improve heat dissipation, such as Figure 1 and Figure 2 As shown, the battery cooling structure 1 further includes an insulating heat dissipation layer 5. At least a portion of the insulating heat dissipation layer 5 is fitted over the conductive component 4. An insulating liquid jacket is fitted over the conductive component 4 through the insulating heat dissipation layer 5.

[0065] Under normal circumstances, the insulating heat dissipation layer 5 is made of insulating material, which has high insulation performance and a thermal conductivity of not less than 1W / m*K.

[0066] An insulating heat dissipation layer 5 is fitted over at least a portion of the conductive component 4 via an insulating liquid sleeve. The high insulation performance of the insulating layer effectively prevents electrical faults such as short circuits, while its high thermal conductivity quickly transfers the heat generated by the conductive component 4 to the coolant in the insulating liquid sleeve, achieving efficient heat dissipation. This not only protects the battery's electrical safety but also more effectively reduces the temperature of the conductive component 4, preventing performance degradation and shortened lifespan due to overheating.

[0067] In practical applications, the insulating heat dissipation layer 5 is incorporated. During heat transfer from the conductive component 4, heat is first rapidly dissipated through the insulating heat dissipation layer 5, and then carried away by the coolant in the insulating liquid jacket. This multi-layered heat dissipation structure not only ensures the safe operation of the battery but also further enhances cooling efficiency, enabling it to better meet the heat dissipation requirements of the battery during high-rate charging and discharging.

[0068] In some embodiments, such as Figures 3 to 6As shown, the cooling kit 12 includes: a first extension 122, a second extension 123, and a connecting portion 124; the first extension 122 is connected to the second extension 123 through the connecting portion 124; the first extension 122 and the second extension 123 are spaced apart, and a clamping space 126 for clamping the conductive element 4 is formed between them; at least a portion of the second cooling channel 121 is located in the first extension 122 and / or the second extension 123.

[0069] Specifically, the clamping space 126 between the first extension 122 and the second extension 123 can tightly clamp and fit the conductive element 4, enhancing the thermal conductivity. Depending on the required heat dissipation effect, a second cooling channel 121 can be formed in at least one of the first extension 122 and the second extension 123. For example, when the required heat exchange is low, a second cooling channel 121 can be provided in only one of the first extension 122 and the second extension 123. When the required heat exchange is high, second cooling channels 121 can be provided in both the first extension 122 and the second extension 123.

[0070] By placing a portion of the second cooling channel 121 within the first extension 122 and / or the second extension 123, it can directly exchange heat with the conductive element 4, removing heat. This optimizes the flow path of the coolant, improves heat dissipation efficiency, and ensures that the conductive element 4 remains within a low temperature range during high-rate charging and discharging processes.

[0071] In some embodiments, such as Figures 3 to 8 As shown, the second cooling channel 121 includes a heat exchange region 1211 and a flow region 1212; the connecting portion 124 is provided with a kit inlet 1241 and a kit outlet 1242 on the outside, and a flow region 1212 is formed inside. The kit inlet 1241 is connected to the inlet pipe 13, so that the coolant can flow smoothly into the cooling kit 12. The kit outlet 1242 is connected to the outlet pipe 14, so that the coolant can flow out after absorbing heat, completing the heat exchange process; the first extension 122 and / or the second extension 123 form a heat exchange region 1211, so that the coolant can fully contact the conductive component 4 in the heat exchange region 1211, achieving efficient heat exchange.

[0072] In this embodiment, the flow region 1212 primarily serves to transport the coolant, ensuring its smooth flow within the cooling kit 12. The coolant flows in from the kit inlet 1241, passes through the flow region 1212, and finally flows out from the kit outlet 1242. The flow region 1212 is generally divided into an inlet flow region 12121 and an outlet flow region 12122. The inlet flow region 12121 communicates with the kit inlet 1241, and the outlet flow region 12122 communicates with the kit outlet 1242. The heat exchange region 1211 is the area where the coolant exchanges heat with the conductive element 4. Located inside the first extension 122 and / or the second extension 123, these extensions are typically in close contact with the conductive element 4, allowing the coolant to efficiently absorb the heat generated by the conductive element 4 within the heat exchange region 1211.

[0073] To facilitate the installation and setup of the entire cooling kit 12, such as Figures 3 to 8 As shown, the first extension 122 is inclined toward the side away from the second extension 123, and the inclination angle α1 of the first extension 122 is 0.5 degrees to 2.5 degrees; and / or, the second extension 123 is inclined toward the side away from the first extension 122, and the corresponding inclination angle α2 of the second extension 123 is 0.5 degrees to 2.5 degrees.

[0074] In this embodiment, the first extension 122 and the second extension 123 are locked together by at least one bolt and nut 125. The locking method of the bolt and nut 125 can also be adjusted as needed to accommodate conductive parts 4 of different sizes or shapes, ensuring that the cooling kit 12 can fit tightly against the conductive parts 4 and further optimize heat dissipation performance.

[0075] The inclined angles of the first extension 122 and the second extension 123 engage to lock the conductive element 4, reducing the air gap between the conductive element 4 and the first and second extensions 122 and 123. This reduction in air gap means an increased contact area between the conductive element 4 and the cooling assembly 12, thereby lowering the contact thermal resistance. This reduced contact thermal resistance helps improve heat conduction efficiency, allowing the heat generated by the conductive element 4 to be more effectively transferred to the coolant and carried away.

[0076] In some embodiments, such as Figure 5 and Figure 6 As shown, a serpentine flow channel is provided within the heat exchange zone 1211. The serpentine flow channel includes multiple parallel flow channel segments and connecting segments that alternately connect the ends of adjacent flow channel segments to form a continuously bending U-shaped path within the first extension 122 and / or the second extension 123. The serpentine flow channel is provided with a flow channel inlet 1213 and a flow channel outlet 1214. The flow channel inlet 1213 is used for coolant inlet, and the flow channel outlet 1214 is used for coolant outlet.

[0077] In this embodiment, the serpentine flow channel significantly increases the flow length of the coolant within the heat exchange zone 1211, allowing the coolant more time to exchange heat with the conductive component 4, thereby improving heat dissipation efficiency. Specifically, the serpentine flow channel, through a combination of multiple parallel flow channel segments and connecting segments, expands the contact area between the coolant and the conductive component 4, enabling more heat to be absorbed by the coolant. The coolant needs to pass through multiple bends in the serpentine flow channel, which prolongs the residence time of the coolant within the heat exchange zone 1211, ensuring more thorough heat exchange. The continuous bending path of the serpentine flow channel allows for a more uniform flow velocity distribution of the coolant within the channel, avoiding excessively fast or slow local flow velocities, thereby improving the overall heat dissipation effect.

[0078] During operation, the cooling system starts running. After being pressurized by the cooling equipment (such as a water pump), the coolant flows out from the input end of the cooling system and flows into the first cooling channel of the liquid cooling plate 11 through the main inlet pipe 131 of the inlet pipe 13. At the same time, a portion of the coolant is diverted from the main inlet pipe 131 to the branch inlet pipe 132 and flows into the second cooling channel 121 of the cooling kit 12.

[0079] Within the first cooling channel of the liquid cooling plate 11, coolant flows along the channel. Since the liquid cooling plate 11 is in close contact with the first battery module 2 and the second battery module 3, heat exchange occurs between the coolant and the electrode assembly. The heat generated by the first battery module 2 and the second battery module 3 during charging and discharging is transferred to the liquid cooling plate 11, which then conducts the heat to the flowing coolant, raising the temperature of the coolant and thus achieving heat dissipation and cooling of the electrode assembly.

[0080] Within the second cooling channel 121 of the cooling kit 12, the coolant flow path is divided into a flow region 1212 and a heat exchange region 1211. The coolant enters from the kit inlet 1241 outside the connecting portion 124, flows within the flow region 1212, and is transported to the heat exchange region 1211. Within the heat exchange region 1211, a serpentine flow path is provided, comprising multiple parallel flow path segments and connecting segments alternately connecting the ends of adjacent flow path segments, forming a continuously bending U-shaped path. The coolant flows sequentially through each flow path segment and connecting segment in the serpentine flow path, achieving sufficient heat exchange with the conductive element 4. The heat generated by the conductive element 4 during current conduction is absorbed by the coolant, causing the coolant temperature to rise.

[0081] After heat exchange, the coolant flows out from the first cooling channel of the liquid cooling plate 11 and enters the outlet pipe 14 through the main outlet pipe 141; at the same time, the coolant flowing out from the second cooling channel 121 of the cooling kit 12 flows into the main outlet pipe 141 through the outlet branch pipe 142. The main outlet pipe 141 transports the coolant with absorbed heat from both parts back to the output end of the cooling system, completing one cycle.

[0082] The cooling system dissipates the heat absorbed from the coolant to the external environment through its internal heat dissipation devices (such as radiators and condensers), thereby lowering the coolant temperature, restoring its cooling capacity, and preparing it for the next cycle.

[0083] This application also provides a battery, such as... Figures 1 to 8 As shown, the battery module includes a first battery module 2, a second battery module 3, a conductive component 4, and a battery cooling structure 1. The first battery module 2 is electrically connected to the second battery module 3 via the conductive component 4. The battery cooling structure 1 includes a liquid cooling plate 11, a cooling kit 12, an inlet pipe 13, and an outlet pipe 14. The liquid cooling plate 11 is disposed on one side of the first battery module 2 and the second battery module 3, and has a first cooling channel formed therein. The cooling kit 12 is used for thermal conduction with the conductive component 4, and has a second cooling channel 121 formed therein. The inlet pipe 13 is connected to the first cooling channel and the second cooling channel 121. The outlet pipe 14 is connected to the first cooling channel and the second cooling channel 121.

[0084] In this embodiment, the first cooling channel inside the liquid cooling plate 11 is used for heat exchange between the first battery module 2 and the second battery module 3, removing the heat generated by the first battery module 2 and the second battery module 3. The cooling kit 12 can achieve thermal conductivity with the conductive component 4, effectively transferring the heat generated by the conductive component 4. It has a second cooling channel 121 inside to dissipate heat from the conductive component 4. The liquid inlet pipe 13 is connected to the first cooling channel and the second cooling channel 121 respectively, ensuring that the coolant can flow smoothly into each part that needs heat dissipation. The liquid outlet pipe 14 is connected to the liquid outlet end of the liquid cooling plate 11 and the cooling kit 12, used to discharge the coolant after absorbing heat, completing a cooling cycle so that the coolant can be recycled in the system to continuously remove heat.

[0085] When the battery is in a high-rate charge / discharge state, the first battery module 2, the second battery module 3, and the conductive component 4 generate a large amount of heat. At this time, coolant enters both the first cooling channel of the liquid cooling plate 11 and the second cooling channel 121 of the cooling kit 12 through the inlet pipe 13. In the liquid cooling plate 11, the coolant flows along the first cooling channel, exchanging heat with the first battery module 2 and the second battery module 3, absorbing the heat generated by the electrode assembly, and effectively reducing the temperature of the electrode assembly. At the same time, in the cooling kit 12, the coolant flows in the second cooling channel 121, making close contact with the conductive component 4, quickly carrying away the heat generated by the conductive component 4, preventing the conductive component 4 from overheating and causing performance problems or even damage. After absorbing heat, the coolant temperature rises, and it is then discharged through the outlet pipe 14 into an external cooling system (such as a radiator) for heat dissipation and cooling, before circulating back to the inlet pipe 13 to continue the next cooling cycle. This process is repeated to achieve heat dissipation for the battery.

[0086] The battery provided by this utility model can simultaneously supply liquid to the liquid cooling plate 11 and the cooling kit 12 via the inlet pipe 13, and simultaneously discharge liquid to the liquid cooling plate 11 and the cooling kit 12 via the outlet pipe. This allows the liquid cooling plate 11 and the cooling kit 12 to dissipate heat from the first battery module 2, the second battery module 3, and the conductive component 4, respectively. During high-rate charging and discharging of the battery, this effectively reduces the temperature of the first battery module 2, the second battery module 3, and the conductive component 4, avoiding performance degradation, shortened lifespan, and safety hazards caused by overheating, thus improving the overall performance and reliability of the battery. Since both inlet and outlet pipes share a single liquid inlet pipe 13, it significantly saves layout space, simplifies the control strategy, and reduces costs.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A battery cooling structure characterized by, Applied to a battery comprising: a first battery module, a second battery module, and a conductive element, wherein the first battery module is used to be electrically connected to the second battery module through the conductive element; The battery cooling structure includes: A liquid cooling plate is disposed on one side of the first battery module and the second battery module, and a first cooling channel is formed therein; A cooling kit for thermally conducting with the conductive component, having a second cooling channel formed therein; The liquid inlet pipe is connected to the first cooling channel and the second cooling channel; The liquid outlet pipe is connected to the first cooling channel and the second cooling channel.

2. The battery cooling structure according to claim 1, characterized in that, The inlet pipe includes: The liquid inlet main pipe is connected at one end to the liquid inlet of the first cooling channel and at the other end to the input of the cooling system. The liquid inlet branch pipe is connected at one end to the main liquid inlet pipe and at the other end to the liquid inlet of the second cooling channel.

3. The battery cooling structure according to claim 2, characterized in that, The outlet pipe includes: The liquid outlet pipe is connected at one end to the liquid outlet of the first cooling channel and at the other end to the output end of the cooling system. The liquid outlet branch pipe is connected at one end to the main liquid outlet pipe and at the other end to the liquid outlet of the second cooling channel.

4. The battery cooling structure according to claim 3, characterized in that, The ratio of the diameter of the inlet branch pipe to the diameter of the inlet main pipe is 0.2 to 0.4; The ratio of the diameter of the outlet branch pipe to the diameter of the outlet main pipe is 0.2 to 0.

4.

5. The battery cooling structure according to claim 1, characterized in that, The cooling kit is an insulating liquid sleeve, which is fitted over the conductive component.

6. The battery cooling structure according to claim 5, characterized in that, The battery cooling structure further includes: an insulating heat dissipation layer, covering at least a portion of the conductive component; The insulating liquid sleeve is fitted over the conductive component through the insulating heat dissipation layer.

7. The battery cooling structure according to claim 1, characterized in that, The cooling kit includes: a first extension, a second extension, and a connecting portion; The first extension is connected to the second extension via the connecting portion; The first extension and the second extension are spaced apart, and a clamping space for clamping the conductive element is formed between them; At least a portion of the second cooling channel is located in the first extension and / or the second extension.

8. The battery cooling structure according to claim 7, characterized in that, The second cooling channel includes: a heat exchange area and a flow area; The connecting part is provided with a kit liquid inlet and a kit liquid outlet on the outside, and the flow area is formed inside. The kit liquid inlet is connected to the liquid inlet pipe, and the kit liquid outlet is connected to the liquid outlet pipe. The heat exchange region is formed within the first extension and / or the second extension.

9. The battery cooling structure according to claim 7, characterized in that, The first extension is inclined toward a side away from the second extension, and the inclination angle of the first extension is 0.5 degrees to 2.5 degrees; And / or, the second extension is inclined toward a side away from the first extension, and the inclination angle of the second extension is 0.5 degrees to 2.5 degrees.

10. The battery cooling structure according to claim 8, characterized in that, The heat exchange area is equipped with a serpentine flow channel; The serpentine flow channel includes: a plurality of parallel flow channel segments, and connecting segments that alternately connect the ends of adjacent flow channel segments to form a continuously bent U-shaped path within the first extension and / or the second extension.

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