Portable in-situ high-low temperature battery testing device

Abstract

The utility model discloses a portable in-situ high-low temperature battery testing device, which comprises a device shell, and a vacuum interface is arranged at the top of the device shell; a cold and hot table is mounted in the device shell, and a plurality of button cell brackets are arranged on one side of the cold and hot table; a temperature adjusting assembly used for adjusting the temperature of the battery and a temperature detecting assembly used for detecting the temperature of the battery are further arranged in the device shell. Detection equipment is integrated in the device shell, the laboratory space requirement is greatly saved by simplifying the design and reducing the equipment size, and the device is suitable for a limited space or an occasion where multiple pieces of equipment need to operate at the same time; the temperature adjusting assembly and the temperature detection assembly can rapidly sense the temperature change of the battery in real time and achieve accurate adjustment, the temperature response speed is obviously better than that of a traditional test box, the requirement for rapid switching between high temperature and low temperature is effectively met, the temperature control stability in the low-temperature limit state is ensured, and the service life of the battery is prolonged. Therefore, the test efficiency and the data reliability are improved.

Description

Technical Field

[0001] This utility model relates to the field of in-situ high and low temperature battery testing technology, and specifically to a portable in-situ high and low temperature battery testing device. Background Technology

[0002] Lithium-ion batteries need to operate under varying temperature conditions, from frigid winters to scorching summers, and even maintain stable performance in extreme environments. Temperature has a significant impact on lithium-ion batteries: at high temperatures, the internal chemical reactions within the battery intensify, easily leading to capacity decay, shortened lifespan, and even the safety risk of thermal runaway; while at low temperatures, the internal electrochemical activity of the battery weakens, electrolyte viscosity increases, and lithium-ion migration speed decreases, resulting in a significant drop in capacity and discharge performance, and may even lead to battery failure.

[0003] Therefore, to evaluate the performance and safety of lithium-ion batteries under different temperature environments, researchers typically conduct high and low temperature environmental tests to understand key performance indicators such as discharge capacity, cycle life, and safety under high and low temperature conditions. In practical applications, to meet the high and low temperature environmental testing needs of lithium-ion batteries, specialized high and low temperature test chambers have emerged on the market for such testing. A high and low temperature test chamber is an environmental chamber capable of controlling temperature, typically simulating a wide temperature range from -40°C to 150°C. By conducting charge and discharge tests on batteries under controlled temperature conditions, performance data of the batteries under different temperature conditions can be obtained.

[0004] The technology of high and low temperature test chambers, which are now widely used, is relatively mature. They generally use compressor-type refrigeration and electric heating elements to achieve temperature control and have multiple control functions to precisely adjust temperature and humidity. However, although high and low temperature test chambers have broad application prospects in lithium-ion battery testing, some drawbacks still exist.

[0005] First, high and low temperature test chambers are relatively large, typically occupying significant laboratory space. This is especially true when multiple chambers need to operate simultaneously, increasing the difficulty of equipment management and space layout. Second, these chambers usually employ compressor-based refrigeration, which can generate considerable noise during prolonged operation, disrupting the laboratory environment. This is a disadvantage for laboratories with stringent noise control requirements.

[0006] In addition, although the temperature control accuracy of the high and low temperature test chamber is high, the temperature control effect may not be as stable as under normal temperature conditions at the low temperature limit (e.g., close to -40℃). Especially when the temperature changes rapidly, the test chamber may need a long time to recover stability, which will affect the test efficiency and the reliability of the data.

[0007] Furthermore, since battery high and low temperature testing typically involves prolonged charge and discharge processes, this places high demands on the temperature control system of the test chamber. During testing, the battery's self-heating can affect the internal temperature stability of the test chamber. Therefore, the test chamber needs a good heat dissipation system to effectively dissipate the heat dissipated by the battery and prevent internal temperature fluctuations from affecting the test results. In addition, with the reduction in the size and the increase in the energy density of lithium-ion batteries, current high and low temperature test chambers have certain limitations in adapting to precise battery testing. This is reflected in the fact that the test chamber may not be able to quickly respond to and adjust to local temperature changes in some high-density batteries, which places even higher demands on the temperature control system of the test chamber. Moreover, some high and low temperature test chambers have complex structures and limited internal space, making battery placement and test connection operations cumbersome, which brings inconvenience to the pre-test preparation work and is not conducive to efficient testing.

[0008] To address various problems with existing high and low temperature test chambers, this patent proposes a novel structural design for a portable in-situ high and low temperature battery testing device. This design aims to improve upon the shortcomings of existing conditions by focusing on miniaturization of the equipment, optimizing noise control technology, enhancing temperature control stability and rapid response capabilities in low-temperature environments, and simplifying the structural design to better meet the requirements of high and low temperature testing of lithium-ion batteries. Utility Model Content

[0009] The technical problem to be solved by this utility model is: how to provide a portable and fast-response in-situ high and low temperature battery testing device.

[0010] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0011] A portable in-situ high and low temperature battery testing device includes a device housing, the top of which is provided with a vacuum interface for evacuating the inside of the housing; a hot and cold stage is installed inside the device housing, and several button battery brackets are provided on one side of the hot and cold stage; the device housing also includes a temperature regulating component for adjusting the battery temperature and a temperature detection component for detecting the battery temperature.

[0012] This application integrates the testing equipment inside the device housing, simplifying the design and reducing the device size, thus greatly saving laboratory space requirements. It is suitable for situations with limited space or where multiple devices need to operate simultaneously, improving the layout and management efficiency of the laboratory. Furthermore, this application directly connects to the button cell battery via a button cell battery holder and designs temperature regulation and temperature detection components that can sense battery temperature changes in real time and achieve precise adjustment. Its temperature response speed is significantly better than that of traditional test chambers, effectively solving the need for rapid switching between high and low temperatures and ensuring temperature control stability under extreme low-temperature conditions, thereby improving testing efficiency and data reliability.

[0013] As a further embodiment of this utility model: the temperature regulating component includes a heating element mounted on a hot and cold stage and a semiconductor refrigeration chip, and a cooling element in contact with the rear side of the semiconductor refrigeration chip.

[0014] As a further embodiment of this utility model: the cooling component includes a circulating water cooling block, wherein a circulating water cooling pipe is provided inside the circulating water cooling block, and the two ends of the circulating water cooling pipe are respectively connected to the water cooling interface located at the top of the device housing.

[0015] As a further embodiment of this utility model: the device housing includes a housing and a front cover plate that can be detachably installed on the front side of the housing. A sealing shell is also provided inside the housing and on the outside of the hot and cold table. A sealing plate is connected to the rear side of the sealing shell, and an inner cover plate is connected to the front side of the sealing shell.

[0016] As a further embodiment of this utility model, a sealing gasket is also provided at the connection position between the housing and the front cover.

[0017] As a further embodiment of this utility model, a hot and cold table cover plate is detachably installed on the front side of the hot and cold table.

[0018] As a further embodiment of this utility model, the top of the device housing is also provided with a temperature control interface for the temperature regulation component.

[0019] As a further embodiment of this invention: the temperature detection component adopts a Pt100 temperature sensor and is installed at the bottom of the hot and cold platform.

[0020] As a further aspect of this utility model, the temperature control adjustment range of the temperature adjustment component is between -40℃ and 100℃.

[0021] As a further aspect of this utility model, the material of the hot and cold stage is selected from metals with good thermal conductivity, such as silver or copper.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] 1. By simplifying the design and reducing the size of the device, this application presents a portable high and low temperature testing device that is only the size of a laptop, which greatly saves laboratory space requirements. It is suitable for occasions with limited space or where multiple devices need to be operated at the same time, improving the layout and management efficiency of the laboratory. The structure is simple and compact, reducing the cumbersome battery placement and test connection operations caused by the complex structure of traditional high and low temperature test chambers, greatly shortening the experimental preparation time, and improving the convenience and efficiency of testing.

[0024] 2. This application eliminates the need for compressor refrigeration technology, thus generating no noise and providing ideal testing conditions for noise-sensitive environments, enabling researchers to work efficiently in a quiet environment. In addition, this application adopts a direct connection to button cells and designs temperature regulation and temperature detection components that can sense battery temperature changes in real time and achieve precise adjustment. Its temperature response speed is significantly better than that of traditional test chambers, effectively solving the need for rapid switching between high and low temperatures, ensuring temperature control stability under extreme low-temperature conditions, thereby improving testing efficiency and data reliability.

[0025] 3. In terms of heat dissipation, this application effectively addresses the self-heating phenomenon of the battery during charging and discharging by combining a circulating water cooling block and a semiconductor cooling chip, ensuring the stability of the internal temperature during testing and avoiding the problem of inaccurate data under temperature fluctuations in traditional equipment, thereby significantly improving the reliability and accuracy of test results.

[0026] 4. This application not only ensures the rapid temperature response and regulation function of button cells, but also greatly reduces the volume occupancy of the high and low temperature test chamber, and significantly reduces the noise and heat generated by traditional air compressors, making its temperature control more accurate and timely.

[0027] In summary, this application outperforms traditional high and low temperature test chambers in terms of experimental efficiency, space saving, noise control, temperature response speed, and heat dissipation performance, effectively solving multiple bottlenecks of traditional technologies and possessing significant value for widespread application. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the in-situ high and low temperature battery testing device according to an embodiment of the present invention;

[0029] Figure 2 This is a partial exploded view of the in-situ high and low temperature battery testing device according to an embodiment of this utility model;

[0030] Figure 3 This is a side view of the in-situ high and low temperature battery testing device according to an embodiment of the present invention;

[0031] Figure 4 This is an embodiment of the present utility model. Figure 3 Sectional view along line AA;

[0032] Figure 5 This is a schematic diagram of the structure of the heating / cooling stage and temperature control assembly according to an embodiment of the present invention;

[0033] Figure 6 This is an embodiment of the present utility model. Figure 5 A structural diagram from another perspective;

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Temperature control interface; 2. Water cooling interface; 3. Vacuum interface; 4. Housing; 5. Front cover; 6. External electrode wiring connection port; 7. Inner cover; 8. Hot and cold stage cover; 9. Hot and cold stage; 10. Button battery bracket; 11. Sealing shell; 12. Circulating water cooling block; 13. Semiconductor cooling chip; 14. Heating element; 15. Sealing plate. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] Reference Figure 1 A portable in-situ high and low temperature battery testing device that can be applied in the field of materials science. This high and low temperature button battery testing device can be loaded with various types of batteries such as 2032, and the number of batteries loaded can reach more than 32.

[0038] The testing device specifically includes a housing 4 and a front cover 5 that is detachably connected by bolts or pins. A sealing gasket is provided at the connection between the housing 4 and the front cover 5 to ensure the housing is sealed. A vacuum interface 3 is installed on the top of the housing 4, which can be connected to an external vacuum machine to evacuate the interior of the housing 4 into a vacuum chamber. The vacuum chamber is the outer cavity of the overall device, which serves to insulate the heat and reduce heat exchange during subsequent cooling or heating processes, enabling the coin cell battery to achieve rapid temperature response and regulation on the hot and cold stage 9. Therefore, the material of the vacuum chamber needs to meet the requirements of structural stability and excellent thermal conductivity. The material selection for the housing 4 and the front cover 5 includes, but is not limited to, various stainless steel materials and aluminum alloy materials.

[0039] It should be noted that the vacuum interface 3 is designed on the side of the vacuum chamber. The entire vacuum chamber has a cuboid structure, and its size varies depending on the number of built-in button batteries. However, the overall structure generally does not exceed the size of an A4 sheet of paper, ensuring that the entire structure is compact and small, making it suitable for laboratory placement and handling.

[0040] Reference Figure 2 and Figure 6The housing 4 has a hot and cold platform 9 installed inside. Inside the housing 4 and outside the hot and cold platform 9, there is a sealing shell 11. A sealing plate 15 is connected to the rear side of the sealing shell 11. An inner cover plate 7 is detachably connected to the front side of the sealing shell 11 by bolts or pins. A hot and cold platform cover plate 8 is detachably installed on the front side of the hot and cold platform 9 by bolts or pins. It should be noted that a groove is reserved in the middle of the inner cover plate 7 for matching the hot and cold platform cover plate 8.

[0041] Reference Figure 2 and Figure 5 The hot and cold stage 9 has several battery slots, and each battery slot is equipped with a button battery holder 10. The button battery holder 10 is used to install button batteries. It should be noted that the number of battery slots and button battery holders 10 is the same, depending on the size of the hot and cold stage 9 and the actual needs. This application does not limit it. The hot and cold stage 9 adopts a cuboid structure as a whole. The surface is designed with slots for installing button batteries. It is also designed with upper and lower connecting wires for installing button batteries and making positive and negative contacts.

[0042] Furthermore, a semiconductor cooling chip 13 is provided on the rear side of the hot and cold stage 9, and a heating element 14 is provided on the bottom of the hot and cold stage 9. A circulating water cooling block 12 is provided on the rear side of the semiconductor cooling chip 13 and is in contact with it. The circulating water cooling block 12 is provided with a circulating water cooling pipe inside. The two ends of the circulating water cooling pipe are respectively connected to the water cooling interface 2 located on the top of the device housing. The water cooling interface 12 is connected to an external water pump and cooling water, so that external cooling water can be injected into the circulating water cooling pipe inside the circulating water cooling block 12 through the water cooling interface 12, thereby cooling the hot and cold stage 9 through the semiconductor cooling chip 13. The heating element 14 can heat the hot and cold stage 9. The two work together to achieve temperature control of the cooling stage 9.

[0043] The hot and cold stage 9 and its corresponding temperature control components are the core of this equipment. In order to ensure the fast response function of the button cell battery and to monitor the temperature change of the battery itself in real time, while reducing the noise and other effects caused by traditional air compressors, the temperature control components use an electrically controlled semiconductor cooling chip 13 and a heating element 14 to control the temperature of the hot and cold stage 9. At the same time, the battery is installed on the hot and cold stage 9 to control the battery temperature. Therefore, the hot and cold stage 9 needs to be made of materials with excellent thermal conductivity, including but not limited to metallic silver, copper and other materials.

[0044] Furthermore, the semiconductor cooling chip 13, serving as the cooling device for the entire heating and cooling platform 9, is connected to an external cooling water circulator via the water-cooling interface 2 to effectively dissipate heat from the heating and cooling platform 9, thereby achieving low-temperature regulation. Simultaneously, the heating element 14, installed at the bottom of the heating and cooling platform 9, is responsible for its heating function; a standard commercial heating resistance wire can be used for the heating element 14. Through the combined use of these two components, the temperature of the button cells on the entire heating and cooling platform can be regulated, with an adjustment range of -40℃ to 100℃. Temperature changes are measured in real-time by a temperature sensor PT100 located inside the heating and cooling platform 9, enabling real-time and rapid sensing of battery temperature changes and precise adjustment. The temperature control interface 1 on the top of the housing 4 is connected to the heating element 14.

[0045] The semiconductor cooling chip 13 is equipped with circulating cooling water for cooling treatment, which enables it to operate efficiently and safely. This in-situ high and low temperature button battery test device can control the temperature according to the user's needs. Through the cooperation of the semiconductor cooling chip 13 and the heating element 14, the heating and cooling of the hot and cold stage is realized to provide the battery with environmental field temperature changes, thereby realizing the testing of the battery's electrical performance at different temperatures.

[0046] The specific operating principle of this application is as follows:

[0047] First, open the front cover 5, inner cover 7, and hot / cold stage cover 8 of the device. The multiple covers here also protect the battery. Then, place the button cell battery and close the hot / cold stage cover 8, inner cover 7, and front cover 5 in sequence. Connect the device to an external vacuum pump through the vacuum interface 3 to provide a vacuum environment inside the device for heat insulation. Connect the water cooling interface 2 to an external water chiller to provide the heat dissipation source required by the semiconductor cooling chip. Connect the electrode external wiring interface 6 on the side of the device to the electrical testing device. Connect the temperature control interface 1 to an external temperature control box. Control the heating element 14 and the cooling pipe through the corresponding control software to achieve temperature control. At the same time, use the electrical testing device to test the battery's electrical performance to obtain the required data.

[0048] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended 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 portable in-situ high and low temperature battery testing device comprising a device housing, characterized in that, The top of the device housing is provided with a vacuum interface (3) for vacuumizing the inside of the housing; the inside of the device housing is provided with a cold and hot table (9), a plurality of buckle type battery supports (10) are arranged on one side of the cold and hot table (9); the device housing is also provided with a temperature adjusting assembly for adjusting the temperature of the battery and a temperature detecting assembly for detecting the temperature of the battery.

2. The portable in-situ high-low temperature battery testing device of claim 1, wherein: The temperature adjusting assembly comprises a heating body (14) and a semiconductor refrigeration sheet (13) mounted on the cold and hot table (9), and the rear side of the semiconductor refrigeration sheet (13) is provided with a cooling member in contact with the semiconductor refrigeration sheet (13).

3. The portable in situ high-low temperature battery testing device of claim 2, wherein: The cooling member comprises a circulating water cooling block (12), wherein the inside of the circulating water cooling block (12) is provided with a circulating water cooling pipe, and the two ends of the circulating water cooling pipe are respectively connected to a water cooling interface (2) located at the top of the device housing.

4. The portable in situ high-low temperature battery testing device of claim 1, wherein: The device housing comprises a housing (4) and a front cover plate (5) detachably mounted on the front side of the housing (4), and a sealing shell (11) is further arranged inside the housing (4) and located outside the cold and hot table (9), the rear side of the sealing shell (11) is connected with a sealing plate (15), and the front side of the sealing shell (11) is connected with an inner cover plate (7).

5. The portable in situ high-low temperature battery testing device of claim 4, wherein: A sealing gasket is further arranged at the connecting position of the housing (4) and the front cover plate (5).

6. The portable in situ high-low temperature battery testing device of claim 1, wherein: A cold and hot table cover plate (8) is detachably mounted on the front side of the cold and hot table (9).

7. The portable in situ high-low temperature battery testing device of claim 1, wherein: The top of the device housing is further provided with a temperature control interface (1) of the temperature adjusting assembly.

8. The portable in situ high-low temperature battery testing device of claim 1, wherein: The temperature detecting assembly adopts a temperature sensor Pt100 and is arranged at the bottom of the cold and hot table (9).

9. The portable in situ high-low temperature battery testing device of claim 1, wherein: The temperature control adjusting range of the temperature adjusting assembly is between -40℃ and 100℃.

10. The portable in situ high-low temperature battery testing device of claim 1, wherein: The material of the cold and hot table (9) is selected from metal silver or copper with good thermal conductivity.

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