A thermally conductive pad and a liquid-cooled energy storage battery application platform
By using a thermally conductive pad with built-in temperature measurement points in the liquid-cooled energy storage battery system, the problem of lack of temperature data at the bottom of the cell was solved, enabling temperature balance assessment and heat dissipation optimization at the battery cluster level, and improving the accuracy and reliability of the system's thermal management.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 天能新能源(湖州)有限公司
- Filing Date
- 2025-08-18
- Publication Date
- 2026-07-31
AI Technical Summary
In existing liquid-cooled energy storage battery systems, there is a lack of data on the bottom temperature of the cells, which leads to deviations in thermal management strategies, makes it difficult to assess uneven heat dissipation, and affects battery life and system stability.
Design a thermal pad with a plate-like structure containing flexible thermally conductive material, incorporating multiple temperature measurement points and wiring harness plugs, to simultaneously acquire temperature data at the bottom of the battery cell, evaluate the heat dissipation effect and adjust the distribution of the cooling medium through multi-point temperature comparison.
It enables comprehensive monitoring of the bottom temperature of the battery cell, assesses heat dissipation uniformity and temperature balance at the battery cluster level, and improves thermal management accuracy and system stability.
Smart Images
Figure CN224582318U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of heat dissipation effect testing technology for liquid-cooled energy storage batteries, specifically involving a thermal pad that can comprehensively detect the temperature at various points and a platform for using the liquid-cooled energy storage battery with the thermal pad. Background Technology
[0002] Currently, energy storage battery systems are widely used in new energy power generation, grid frequency regulation, and electric vehicles. Their thermal management performance directly affects the safety, lifespan, and energy efficiency of the batteries. In liquid-cooled energy storage battery systems, temperature monitoring is a critical aspect of thermal management. However, current mainstream temperature acquisition schemes typically only measure the temperature of the aluminum bar connected in series with the cell, neglecting the temperature data of the area where the cell bottom contacts the cold plate. Since the cell's heat dissipation path is mainly through heat exchange between the bottom and the cold plate, relying solely on the aluminum bar temperature cannot accurately reflect the overall heat dissipation status of the cell, potentially leading to deviations in thermal management strategies.
[0003] Due to the lack of bottom temperature data for the battery cells, it is difficult to determine the heat dissipation uniformity of different areas of the cold plate, and it is also impossible to assess the impact of the flatness of the stacked battery cells on the thermal conductivity. If there is poor contact between the battery cells and the cold plate or excessively high local thermal resistance, it may lead to local overheating, affecting battery life and even causing the risk of thermal runaway.
[0004] Meanwhile, in cluster-level energy storage systems composed of multiple battery packs, existing solutions struggle to compare the heat dissipation efficiency differences between different batteries. The lack of bottom temperature data prevents precise adjustments to the cooling medium flow distribution or optimization of the cold plate design, leading to insufficient heat dissipation in some batteries and impacting the overall system's stability and lifespan.
[0005] Therefore, there is an urgent need for a new type of thermal conductive structure that can comprehensively monitor the bottom temperature of the battery cell, assess the uniformity of heat dissipation, and provide optimization basis for battery cluster-level thermal management, so as to improve the thermal management accuracy and reliability of liquid-cooled energy storage battery systems. Utility Model Content
[0006] To address the aforementioned technical problems, this application further improves the temperature detection structure of the liquid-cooled energy storage battery, aiming to resolve these issues. One objective of this invention is to provide a thermally conductive pad, and another is to provide a platform for using the liquid-cooled energy storage battery employing this thermally conductive pad.
[0007] The specific technical solution is explained below:
[0008] A thermal pad, comprising:
[0009] The thermal pad body is a flexible plate-shaped part made of thermally conductive material. The thermal pad body has a shape that adapts to the bottom surface of the liquid-cooled energy storage battery, and is placed under the bottom surface of the adapted liquid-cooled energy storage battery during use.
[0010] The temperature measuring part is provided with a number of temperature measuring points, which are distributed at intervals within the heat-conducting pad body.
[0011] The wiring harness plug-in group includes several wiring harness plugs, each of which corresponds to a temperature measuring point and is used to transmit the temperature signal measured at that temperature measuring point.
[0012] In some embodiments, the thermal pad body is rectangular in shape.
[0013] In a preferred embodiment, several temperature measuring points are distributed at intervals along the edge of the longer side of the thermal pad body.
[0014] In a preferred embodiment, there are three temperature measuring points, and the spacing between any two adjacent temperature measuring points is consistent.
[0015] In a preferred embodiment, the distance between any two adjacent temperature measuring points is L1, and the distance between the temperature measuring point at the end and the edge of the thermal pad body near the shorter side of the temperature measuring point is L2.
[0016] The ratio of L1 to L2 is 2.5 to 3.5.
[0017] In some implementations, the length of L1 is 355±10mm and the length of L2 is 115±10mm.
[0018] In a preferred embodiment, the thermal pad body is an elastomer made of thermally conductive silicone with ceramic thermally conductive powder dispersed inside.
[0019] In a further embodiment, a thin-film temperature sensor is provided at each of the temperature measurement points, and the temperature sensor is embedded inside the thermal pad body.
[0020] In a preferred embodiment, the wiring harness plug is a flexible wire used to connect the temperature sensor and the temperature signal receiving device at the temperature measurement point.
[0021] A liquid-cooled energy storage battery platform includes a liquid-cooled energy storage battery and a cold plate, wherein the liquid-cooled energy storage battery is disposed above the cold plate;
[0022] It also includes the thermal pad described in any of the above technical solutions;
[0023] The thermal pad is disposed between the bottom surface of the liquid-cooled energy storage battery and the cold plate.
[0024] In summary, the technical solution described in this utility model has the following main beneficial effects:
[0025] Compared with existing technologies, the thermal pad described in this utility model can detect temperature information near the cell and cold plate at multiple locations within the liquid-cooled energy storage battery, and use this information to evaluate the following:
[0026] ① After multiple battery cells are stacked into a module and installed on the cold plate, is it flat and is the heat conduction effect nearly uniform? If not, the temperature at the corresponding position will also be different.
[0027] ② The difference in heat dissipation effect in different areas of the cold plate. If there is a difference, consider adjusting the distribution of the heat exchange medium.
[0028] ③ By comparing the temperatures at different points, it can be determined whether the flow rate of the heat dissipation medium of the liquid-cooled energy storage battery meets the heat dissipation requirements.
[0029] ④ After multiple battery packs are combined into a cluster-level system, the temperature difference on the thermal pads between different batteries can be used to determine the difference in heat dissipation efficiency between different batteries, providing a basis for further adjustment and optimization.
[0030] Further or more detailed beneficial effects will be described in conjunction with specific embodiments in the detailed implementation. Attached Figure Description
[0031] Figure 1 This is a schematic diagram of the planar structure of the thermal pad in a specific implementation method;
[0032] Figure 2 This is a three-dimensional structural diagram of the liquid-cooled energy storage battery platform in a specific implementation embodiment;
[0033] Figure 3 This is a top view of the liquid-cooled energy storage battery platform in a specific implementation.
[0034] Figure label:
[0035] 1: Thermal pad; 1.1: Thermal pad body; 1.2: Temperature measuring section; 1.21: Temperature measuring point; 1.3: Wiring harness plug-in group; 1.31: Wiring harness plug-in.
[0036] 2: Liquid-cooled energy storage battery; 2.1: Conventional temperature measurement points;
[0037] 3: Cold plate. Detailed Implementation
[0038] The present invention will be further explained in conjunction with the embodiments:
[0039] The core technical problem faced by the technical solution of this application embodiment stems from the inventor's accurate understanding of the prior art. Therefore, how to comprehensively and accurately obtain the temperature distribution of liquid-cooled energy storage batteries is a technical problem that the inventor urgently needs to solve.
[0040] It should be noted that the embodiments do not constitute a limitation on the scope of protection of the claims of this utility model. All technical solutions that can be reasonably expected by those skilled in the art based on the technical concepts provided / proved by the embodiments should be covered within the scope of protection of the claims of this utility model.
[0041] The specific implementation examples are detailed below:
[0042] For existing technologies, please refer to the appendix. Figure 2 The conventional temperature measurement point 2.1 for liquid-cooled energy storage battery 2 is limited to the surface of the aluminum battery cell connected in series. This temperature sampling location is relatively singular. Although it can accurately measure and evaluate the temperature of the cell, it cannot provide temperature information at locations such as the bottom of the cell. Without the temperature data of the bottom of the cell, it is impossible to determine whether the current heat dissipation of the cell meets the design requirements, and there is a lack of key data to adjust the temperature balance between multiple cells after they are clustered together.
[0043] Therefore, please refer to the appendix for further information. Figures 1-3 This embodiment first provides a thermal pad 1, which includes a thermal pad body 1.1, a temperature measuring part 1.2, and a wire harness plug group 1.3.
[0044] The thermal pad body 1.1 is made of thermally conductive material and has a flexible plate-like structure. Its shape is specifically designed to basically match the bottom surface of the liquid-cooled energy storage battery 2, and it is placed directly under the bottom surface of the battery during use. The temperature sensing unit 1.2 is integrated into the thermal pad body and has multiple spaced temperature sensing points 1.21. The wiring harness plug group 1.3 contains multiple wiring harness plugs 1.31, each wiring harness plug 1.31 corresponding to a temperature sensing point 1.21 for transmitting temperature signals.
[0045] This structural design can simultaneously acquire temperature data at the bottom of the battery cell, solving the problem of a single temperature sampling location in existing technologies. Through multi-point temperature comparison analysis, the thermal conduction state between the bottom of the battery cell and the cold plate 3 can be accurately assessed, providing comprehensive data support for judging the heat dissipation effect and adjusting heat dissipation parameters. This is particularly valuable for temperature balance regulation after battery clustering.
[0046] Specifically, it can be used to evaluate the following information:
[0047] ① After multiple battery cells are stacked into a module and installed on the cold plate 3, is it flat and is the heat conduction effect nearly uniform? If they are not uniform, the temperature at the corresponding positions will also be different.
[0048] ② The difference in heat dissipation effect in different areas of cold plate 3. If there is a difference, consider adjusting the distribution of the heat exchange medium.
[0049] ③ After comparing the temperatures at different points, it can be determined whether the flow rate of the heat dissipation medium of the liquid-cooled energy storage battery 2 meets the heat dissipation requirements.
[0050] ④ After multiple battery packs are combined into a cluster-level system, the temperature difference on the thermal pads between different batteries can be used to determine the difference in heat dissipation efficiency between different batteries, providing a basis for further adjustment and optimization.
[0051] In a preferred embodiment of this invention, the thermal pad body 1.1 adopts a rectangular design. This regular geometry perfectly fits the bottom surface shape of most liquid-cooled energy storage batteries 2, ensuring maximum contact area between the thermal pad and the battery bottom surface. The rectangular structure not only facilitates manufacturing but also makes positioning easier during installation, reducing assembly errors. More importantly, this standardized shape is applicable to liquid-cooled energy storage batteries of different capacity specifications, improving product versatility and interchangeability, and facilitating large-scale production and inventory management.
[0052] In further design optimization, multiple temperature measurement points 1.21 are spaced apart along the longer edge of the rectangular thermal pad body 1.1. This layout fully utilizes the longitudinal extension space of the thermal pad body 1.1, allowing the temperature measurement points to cover a larger detection range. In practical applications, the longer side typically corresponds to the length direction of the battery module; placing the temperature measurement points here can more comprehensively reflect the temperature distribution in different areas of the battery bottom. Compared to random or centralized arrangements, this design can obtain more representative temperature sampling data without significantly increasing the number of temperature measurement points, providing a more reliable basis for heat dissipation performance evaluation.
[0053] In one specific embodiment, three temperature measurement points 1.21 are configured, with uniform spacing between adjacent points. This configuration of three measurement points strikes a good balance between detection accuracy and implementation cost, meeting basic temperature monitoring requirements without excessively increasing system complexity. The uniform spacing ensures spatial uniformity of temperature sampling, avoiding blind spots. This arrangement is particularly suitable for standard-sized liquid-cooled energy storage batteries, with the three measurement points corresponding to the front, middle, and rear positions of the battery's bottom, accurately reflecting the temperature gradient along the battery's length.
[0054] More specifically, the ratio of the distance L1 between adjacent temperature measurement points (1.21) to the distance L2 between the end temperature measurement point and the short side of the thermal pad body (1.1) is controlled within the range of 2.5 to 3.5. This ratio has been verified through extensive experiments and can optimally balance the temperature detection needs of both the edge and center regions of the battery. When the ratio is less than 2.5, the temperature measurement points in the center region may be too densely packed; while when it is greater than 3.5, temperature changes in the edge region may be ignored. Maintaining this specific ratio ensures that the temperature sampling points cover the critical areas without wasting resources, thus optimizing the detection effect.
[0055] In a practical product, L1 is preferably 355±10mm, and L2 is preferably 115±10mm. These specific dimensional parameters are designed for the specifications of mainstream liquid-cooled energy storage batteries on the market and can be well matched with the bottom dimensions of most commercial batteries. The tolerance range of ±10mm takes into account both the feasibility of the manufacturing process and ensures adaptability during installation. This standardized size design greatly simplifies the product selection process. Users can directly select the corresponding specification of thermal pad according to the battery size without the need for complex customization, which significantly reduces procurement and usage costs.
[0056] The thermal pad body 1.1 is preferably made of thermally conductive silicone material with ceramic thermally conductive powder dispersed internally. The thermally conductive silicone matrix provides excellent flexibility and elasticity, ensuring that the thermal pad can fit tightly against the bottom surface of the battery and eliminate the influence of air gaps on heat conduction. The ceramic thermally conductive powder (such as alumina, aluminum nitride, or silicon carbide powder) dispersed in the silicone not only maintains the material's high thermal conductivity but also significantly enhances its mechanical strength. This composite material structure allows the thermal pad to effectively transfer heat while withstanding the weight pressure of the battery pack, avoiding compression deformation or cracking during long-term use and ensuring long-term stability of temperature detection.
[0057] In some embodiments, a thin-film temperature sensor is integrated at each temperature measurement point 1.21, completely embedded within the thermal pad body 1.1. The thin-film design minimizes the impact on the thickness and flexibility of the thermal pad, ensuring that the overall performance of the thermal pad is not compromised. Embedding the sensor avoids interference from external ambient temperature fluctuations and protects the sensor from mechanical damage. This integrated design makes the temperature detection system and the thermal pad a cohesive whole, simplifying the installation process and improving the system's reliability and lifespan.
[0058] In some embodiments, the wiring harness plug 1.31 is made of flexible wire and is used to connect the temperature sensor at the temperature measuring point 1.21 and the external temperature signal receiving device. The flexible wire has good bending performance and fatigue resistance, enabling it to adapt to the minute displacements and vibrations of the battery pack under various operating conditions. This design solves the problem of easy breakage in traditional rigid connections, greatly improving the durability of the wiring. At the same time, the flexible wire facilitates wiring and can be flexibly arranged according to actual space conditions, significantly simplifying the complexity of system installation and maintenance.
[0059] This embodiment also provides a liquid-cooled energy storage battery platform, including a cold plate 3, at least one liquid-cooled energy storage battery 2, and a thermal pad 1 as described in any of the above embodiments. The thermal pad 1 is installed between the bottom surface of the liquid-cooled energy storage battery 2 and the cold plate 3, forming a complete thermal management system. This platform is suitable for independent use of a single battery and also supports cluster-level systems composed of multiple batteries arranged side by side. In a multi-battery configuration, by comparing the temperature data on different thermal pads, the differences in heat dissipation efficiency between batteries can be accurately assessed, providing a precise basis for system-level temperature balance adjustment. This design breaks through the limitation of traditional solutions that can only monitor the temperature of a single cell, realizing comprehensive monitoring and optimization of the heat dissipation status of the entire battery pack.
[0060] In the description of this specification, the references to terms such as "embodiment," "basic embodiment," "preferred embodiment," "other embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is 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.
[0061] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.
[0062] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.
Claims
1. A thermally conductive pad, characterized in that, Including: The thermal pad body (1.1) is a flexible plate-shaped part made of thermally conductive material. The thermal pad body (1.1) has a shape adapted to the bottom surface of the liquid-cooled energy storage battery (2) and is placed below the bottom surface of the adapted liquid-cooled energy storage battery (2) during use. The temperature measuring part (1.2) is provided with a plurality of temperature measuring points (1.21), and the plurality of temperature measuring points (1.21) are distributed at intervals within the heat-conducting pad body (1.1); The wire harness plug group (1.3) includes several wire harness plugs (1.31), each of the wire harness plugs (1.31) corresponds to a temperature measuring point (1.21) and is used to transmit the temperature signal measured by the temperature measuring point (1.21).
2. The thermal conductive pad according to claim 1, characterized in that: The thermal pad body (1.1) is rectangular in shape.
3. A thermally conductive pad according to claim 2, characterized in that: Several temperature measuring points (1.21) are distributed at intervals along the edge of the longer side of the thermal pad body (1.1).
4. A thermally conductive pad according to claim 3, characterized in that: There are three temperature measuring points (1.21), and the spacing between any two adjacent temperature measuring points (1.21) is the same.
5. A thermally conductive pad according to claim 4, characterized in that: The distance between any two adjacent temperature measuring points (1.21) is L1, and the distance between the temperature measuring point (1.21) at the end and the edge of the thermal pad body (1.1) near the shorter side of the temperature measuring point (1.21) is L2. The ratio of L1 to L2 is 2.5 to 3.
5.
6. A thermally conductive pad according to claim 5, characterized in that: The length of L1 is 355±10mm, and the length of L2 is 115±10mm.
7. A thermally conductive pad according to claim 1, characterized in that: The thermal pad body (1.1) is an elastomer made of thermally conductive silicone with ceramic thermally conductive powder dispersed inside.
8. A thermally conductive pad according to claim 1, characterized in that: A thin-film temperature sensor is provided at each of the temperature measurement points (1.21), and the temperature sensor is embedded inside the thermal pad body (1.1).
9. A thermally conductive pad according to claim 8, characterized in that: The wiring harness plug (1.31) is a flexible wire used to connect the temperature sensor and temperature signal receiving device at the temperature measuring point (1.21).
10. A liquid-cooled energy storage battery platform, comprising a cold plate (3) and at least one liquid-cooled energy storage battery (2), wherein the liquid-cooled energy storage battery (2) is disposed above the cold plate (3), characterized in that: It also includes the thermal pad (1) as described in any one of claims 1 to 9; The thermal pad (1) is disposed between the bottom surface of the liquid-cooled energy storage battery (2) and the cold plate (3).