Lithium battery high and low temperature performance detection mechanism

Abstract

The utility model discloses a lithium battery high and low temperature performance detection mechanism, which belongs to the technical field of lithium battery detection, and comprises a detection box, a heating box, a refrigeration box and a positioning mechanism, the heating box and the refrigeration box are fixedly arranged in the detection box, and the positioning mechanism is arranged in the heating box and the refrigeration box; the positioning mechanism comprises a supporting plate, an extending plate, a first clamping plate and a second clamping plate, hollowed-out net plates are arranged in the heating box and the refrigerating box, the supporting plate is fixedly arranged above the hollowed-out net plates, a clamping groove is formed in the supporting plate, a lead screw is arranged in the clamping groove, a distance ring is arranged in the middle of the lead screw, and the directions of threads on the two sides of the distance ring are opposite. The first clamping plates are arranged on the two sides of the spacer ring and installed on the lead screw, the extension plates are fixedly arranged on the two sides of the supporting plate, the second clamping plates are elastically arranged on the extension plates, and lithium batteries are placed between the first clamping plates and the second clamping plates. According to the utility model, the performance detection of the lithium battery in high-temperature and low-temperature environments can be realized in the same equipment, and the detection efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery testing technology, and in particular to a lithium battery high and low temperature performance testing mechanism. Background Technology

[0002] As the core power source for modern electronic devices and new energy vehicles, the performance of lithium batteries directly affects the quality of related products and the user experience. The performance of lithium battery materials plays a decisive role in the capacity, charge and discharge efficiency, cycle life, and safety of lithium batteries.

[0003] Chinese patent CN220084898U discloses a high-efficiency testing device for the performance of new energy lithium battery materials. By setting up a temperature regulation component, cooling is achieved through a semiconductor cooler, and heating is achieved through an electrically powered heating tube, thereby controlling the temperature rise and fall of the inner wall of the chamber. This allows for the simulation of the performance of new energy lithium battery materials under different temperatures during performance testing, thus improving the accuracy of the test results.

[0004] However, this patent also has the following problems: Since the heating element and the thermoelectric cooler are inside the same enclosure, the heating element will raise the ambient temperature when it is working, and the thermoelectric cooler may be affected in terms of cooling efficiency and lifespan when it operates in a high-temperature environment. Similarly, the low-temperature environment generated by the thermoelectric cooler may also have a certain impact on the performance and lifespan of the heating element, increasing the maintenance cost and replacement frequency of the equipment. Utility Model Content

[0005] This invention provides a lithium battery high and low temperature performance testing mechanism, which can solve the problem of mutual influence on the service life of heating tubes and semiconductor coolers during operation, as described in the comparison document.

[0006] A lithium battery high and low temperature performance testing mechanism includes a testing chamber, a heating chamber, a cooling chamber, and a positioning mechanism. The heating chamber and the cooling chamber are fixedly installed inside the testing chamber, and a partition is provided between the heating chamber and the cooling chamber. The positioning mechanism is located inside the heating chamber and the cooling chamber. The positioning mechanism includes a support plate, an extension plate, a first clamping plate, and a second clamping plate. A perforated mesh plate is provided inside the heating chamber and the cooling chamber. The support plate is fixedly installed above the perforated mesh plate. A clamping groove is formed on the support plate, and a lead screw is installed in the clamping groove. A spacer ring is provided in the middle of the lead screw. The threads on both sides of the spacer ring are in opposite directions. The lead screw is connected to the output end of a motor. The first clamping plate is located on both sides of the spacer ring and installed on the lead screw. The extension plate is fixedly installed on both sides of the support plate. The second clamping plate is elastically installed on the extension plate. A lithium battery is placed between the first clamping plate and the second clamping plate.

[0007] According to one embodiment of the present invention, a heating wire is provided at the bottom of the perforated mesh plate inside the heating box.

[0008] According to one embodiment of the present invention, a condenser tube is provided at the bottom of the perforated mesh plate inside the refrigeration box.

[0009] According to one embodiment of the present invention, temperature detectors are respectively installed inside the heating box and the cooling box.

[0010] According to one embodiment of the present invention, the outer wall of the detection box is provided with two control panels.

[0011] According to one embodiment of the present invention, the testing box is made of transparent material.

[0012] According to one embodiment of the present invention, one end of the extension plate is fixedly connected to the side wall of the support plate, and the other end is provided with a vertical plate. The side wall of the vertical plate is provided with an installation cylinder, and a spring is provided inside the installation cylinder. The second clamping plate is provided with a guide post on the side near the installation cylinder, and the guide post is inserted into the installation cylinder and connected to the spring.

[0013] According to one embodiment of the present invention, the first clamping plate and the second clamping plate are located on the same horizontal plane.

[0014] According to one embodiment of the present invention, the size of the guide post is adapted to the internal diameter of the mounting cylinder.

[0015] According to one embodiment of the present invention, the first clamping plate and the second clamping plate are provided with soft pads.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model enables the performance testing of lithium batteries under high and low temperature environments in the same device, without the need to transfer the lithium batteries to different devices, thereby improving testing efficiency and reducing data differences that may be caused by the transfer operation.

[0018] 2. This utility model, through the cooperation of the lead screw and the motor, can precisely adjust the position of the first clamping plate, and the elastic design of the second clamping plate can adapt to lithium batteries of different sizes, ensuring that the lithium battery is stably fixed during the testing process and guaranteeing the accuracy of the test results. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the testing box.

[0020] Figure 2 This is a schematic diagram of the installation of the heating box and the cooling box.

[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of the positioning mechanism.

[0022] Figure 4 Top view of the heating and cooling chambers.

[0023] The attached diagram shows the following components: 1. Detection box; 11. Control panel; 12. Partition; 2. Heating box; 21. Heating wire; 3. Cooling box; 31. Condenser tube; 4. Perforated mesh plate; 5. Support plate; 51. Grip groove; 52. Lead screw; 53. Spacer ring; 54. First clamping plate; 55. Motor; 6. Extension plate; 61. Vertical plate; 62. Mounting cylinder; 63. Spring; 64. Second clamping plate; 65. Guide post; 7. Temperature sensor. Detailed Implementation

[0024] The specific embodiments of this utility model are described in detail below, but it should be understood that the scope of protection of this utility model is not limited to the specific embodiments.

[0025] like Figures 1 to 4 As shown, a lithium battery high and low temperature performance testing mechanism includes a testing chamber 1, a heating chamber 2, a cooling chamber 3, and a positioning mechanism. The heating chamber 2 and the cooling chamber 3 are fixedly disposed inside the testing chamber 1, and a partition 12 is provided between the heating chamber 2 and the cooling chamber 3. The positioning mechanism is disposed inside the heating chamber 2 and the cooling chamber 3. The positioning mechanism includes a support plate 5, an extension plate 6, a first clamping plate 54, and a second clamping plate 64. A perforated mesh plate 4 is provided inside the heating chamber 2 and the cooling chamber 3, and the support plate 5 is fixedly disposed on the perforated mesh plate 4. Above the empty mesh plate 4, a clamping groove 51 is provided on the support plate 5. A lead screw 52 is provided in the clamping groove 51. A spacer ring 53 is provided in the middle of the lead screw 52. The threads on both sides of the spacer ring 53 are in opposite directions. The lead screw 52 is connected to the output end of the motor 55. The first clamping plate 54 is provided on both sides of the spacer ring 53 and installed on the lead screw 52. The extension plate 6 is fixedly provided on both sides of the support plate 5. The second clamping plate 64 is elastically provided on the extension plate 6. A lithium battery is placed between the first clamping plate 54 and the second clamping plate 64.

[0026] A heating wire 21 is installed at the bottom of the perforated mesh plate 4 inside the heating chamber 2. When the power is turned on, the heating wire 21 at the bottom of the perforated mesh plate 4 generates heat through the current. The heat is dissipated upwards, raising the air temperature inside the heating chamber 2, thereby providing a high-temperature testing environment for lithium batteries. This allows for rapid and effective heating of the environment inside the heating chamber 2, meeting the temperature requirements for high-temperature performance testing of lithium batteries. The heating wire 21 is installed at the bottom of the perforated mesh plate 4, resulting in relatively uniform heat distribution, which can make the lithium batteries heat more evenly and improve the accuracy of the test results.

[0027] A condenser tube 31 is installed at the bottom of the perforated mesh plate 4 inside the refrigeration chamber 3. Under the action of the refrigeration system, the condenser tube 31 at the bottom of the perforated mesh plate 4 inside the refrigeration chamber 3 carries a low-temperature refrigerant that absorbs the surrounding heat, thereby lowering the air temperature inside the refrigeration chamber 3 and providing a low-temperature testing environment for the lithium battery. This achieves the cooling of the environment inside the refrigeration chamber 3, meeting the requirements for low-temperature performance testing of lithium batteries. The condenser tube 31 is installed at the bottom of the perforated mesh plate 4, which facilitates the uniform distribution of cold air inside the refrigeration chamber 3 and ensures the accuracy of lithium battery testing in low-temperature environments.

[0028] Temperature sensors 7 are respectively installed inside the heating chamber 2 and the cooling chamber 3. The temperature sensors 7 monitor the temperature inside the heating chamber 2 and the cooling chamber 3 in real time and convert the temperature signal into an electrical signal, which is then transmitted to the control panel 11. Based on the received temperature signal, the control panel 11 controls the heating power of the heating wire 21 or the cooling intensity of the condenser tube 31 to maintain the set detection temperature. This ensures precise control of the detection environment temperature, allowing the lithium battery to undergo performance testing under stable temperature conditions, thus improving the reliability and repeatability of the test results.

[0029] Two control panels 11 are installed on the outer wall of the testing chamber 1. The two control panels 11 are used to control the operation of the heating chamber 2, the cooling chamber 3, and the positioning mechanism, respectively. Operators can set the heating and cooling temperatures, start or stop the motor 55, and adjust the clamping force of the first clamping plate 54, etc., using buttons or knobs on the control panels 11. Operation is convenient and quick, allowing operators to flexibly control the equipment operation according to testing needs, improving work efficiency and reducing operational difficulty.

[0030] The testing box 1 is made of transparent material.

[0031] The testing chamber 1 is made of transparent material, such as transparent plastic or glass, so that operators can directly observe the state of the lithium battery in the heating chamber 2 and the cooling chamber 3 during the testing process without opening the testing chamber 1. This allows operators to promptly detect abnormalities in the lithium battery during the testing process, such as bulging or fire, so that safety measures can be taken in time. At the same time, it does not affect the temperature stability of the testing environment, ensuring the continuity and accuracy of the testing.

[0032] One end of the extension plate 6 is fixedly connected to the side wall of the support plate 5, and the other end is provided with a vertical plate 61. A mounting cylinder 62 is provided on the side wall of the vertical plate 61, and a spring 63 is installed inside the mounting cylinder 62. A guide post 65 is provided on the side of the second clamping plate 64 near the mounting cylinder 62. The guide post 65 is inserted into the mounting cylinder 62 and connected to the spring 63. The second clamping plate 64 is connected to the spring 63 via the guide post 65. When a lithium battery is placed, the second clamping plate 64 is compressed by the lithium battery. The guide post 65 compresses the spring 63, and the spring 63 generates a counter-elastic force, causing the second clamping plate 64 to tightly adhere to the lithium battery, providing elastic clamping force. This allows for the adaptation to lithium batteries of different sizes, ensuring the lithium battery is stably fixed. Simultaneously, the elastic clamping force avoids damage to the lithium battery casing, improving the versatility and reliability of the positioning mechanism.

[0033] The first clamping plate 54 and the second clamping plate 64 are located on the same horizontal plane. When clamping the lithium battery, this ensures that the lithium battery is subjected to uniform force, preventing displacement or damage to the lithium battery during the testing process due to uneven force.

[0034] The guide post 65 is sized to fit the internal diameter of the mounting cylinder 62. The guide post 65 can slide smoothly within the mounting cylinder 62, while ensuring that the elastic force of the spring 63 can be accurately transmitted to the second clamping plate 64, so that the second clamping plate 64 can stably clamp the lithium battery.

[0035] The first clamping plate 54 and the second clamping plate 64 are provided with soft pads, which can increase the friction between the clamping plate and the lithium battery, prevent the lithium battery from sliding, and at the same time, the soft pads have a buffering effect, which can prevent the clamping plate from scratching or squeezing the lithium battery shell.

[0036] The testing box 1 serves as an integral frame, with a heating box 2 and a cooling box 3 fixedly installed inside, separated by a partition 12. These separate components ensure that the heating wire 21 and the condenser tube 31 do not interfere with each other during heating and cooling, and that temperature control is achieved without mutual interference. Both the heating box 2 and the cooling box 3 have perforated mesh plates 4, and a positioning mechanism is installed above these plates. In the positioning mechanism, a support plate 5 is fixed to the perforated mesh plate 4, and a lead screw 52 is located in a groove 51 on the support plate 5. A spacer 53 in the middle of the lead screw 52 divides it into two sections with opposite thread directions. The lead screw 52 is connected to the output end of a motor 55. First clamping plates 54 are installed on both sides of the spacer 53 of the lead screw 52, ​​moving towards or away from each other as the lead screw 52 rotates. Extension plates 6 are fixed to both sides of the support plate 5. A mounting cylinder 62 is installed on a vertical plate 61 at one end of the extension plate 6, containing a spring 63. A second clamping plate 64 is connected to the spring 63 via a guide post 65, allowing for elastic extension and retraction. The lithium battery is placed between the first clamping plate 54 and the second clamping plate 64. A heating wire 21 is located at the bottom of the perforated mesh plate 4 inside the heating chamber 2, and a condenser tube 31 is located at the bottom of the perforated mesh plate 4 inside the cooling chamber 3. Temperature sensors 7 are also installed inside both chambers. Two control panels 11 are located on the outer wall of the testing chamber 1, used to control the operation of heating, cooling, and the motor 55, etc. The testing chamber 1 is made of transparent material.

[0037] The working principle of this invention is as follows: A lithium battery is placed between the first clamping plate 54 and the second clamping plate 64. The motor 55 is started, driving the lead screw 52 to rotate. Because the threads on both sides of the spacer ring 53 of the lead screw 52 are in opposite directions, the first clamping plate 54 moves in opposite directions as the lead screw 52 rotates, thus clamping or releasing the lithium battery. Under the action of the spring 63, the second clamping plate 64 adapts to the size of the lithium battery, providing elastic clamping force to ensure the lithium battery is stably fixed. When it is necessary to test the performance of the lithium battery in a high-temperature environment, the heating wire 21 in the heating chamber 2 is activated via the control panel 11. The heating wire 21 heats up, raising the temperature inside the heating chamber 2. The temperature sensor 7 monitors the temperature in real time and provides feedback to the control panel 11. The operator can adjust the heating power as needed to achieve the required testing temperature. Similarly, when testing the performance of the lithium battery in a low-temperature environment, the condenser 31 in the cooling chamber 3 is activated for cooling. The temperature sensor 7 monitors the temperature and adjusts the cooling intensity in conjunction with the control panel 11. Throughout the testing process, the operator can observe the state of the lithium battery through the transparent testing chamber 1.

[0038] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A lithium battery high and low temperature performance testing mechanism, comprising a testing chamber (1), a heating chamber (2), a cooling chamber (3), and a positioning mechanism, wherein the heating chamber (2) and the cooling chamber (3) are fixedly disposed inside the testing chamber (1), and a partition (12) is disposed between the heating chamber (2) and the cooling chamber (3); the positioning mechanism is disposed inside the heating chamber (2) and the cooling chamber (3); Its features are, The positioning mechanism includes a support plate (5), an extension plate (6), a first clamping plate (54), and a second clamping plate (64). The heating box (2) and the cooling box (3) are provided with a perforated mesh plate (4). The support plate (5) is fixedly set above the perforated mesh plate (4). The support plate (5) has a clamping groove (51). A lead screw (52) is set in the clamping groove (51). A spacer ring (53) is set in the middle of the lead screw (52). The threads on both sides of the spacer ring (53) are opposite in direction. The lead screw (52) is connected to the output end of the motor (55). The first clamping plate (54) is set on both sides of the spacer ring (53) and installed on the lead screw (52). The extension plate (6) is fixedly set on both sides of the support plate (5). The second clamping plate (64) is elastically set on the extension plate (6). A lithium battery is placed between the first clamping plate (54) and the second clamping plate (64).

2. The lithium battery high and low temperature performance testing mechanism according to claim 1, characterized in that, Heating wires (21) are provided at the bottom of the perforated mesh plate (4) inside the heating box (2).

3. The lithium battery high and low temperature performance testing mechanism according to claim 1, characterized in that, The bottom of the perforated mesh plate (4) inside the refrigeration box (3) is provided with a condenser pipe (31).

4. The lithium battery high and low temperature performance testing mechanism according to claim 1, characterized in that, Temperature detectors (7) are respectively installed inside the heating box (2) and the cooling box (3).

5. The lithium battery high and low temperature performance testing mechanism according to claim 1, characterized in that, The outer wall of the detection box (1) is provided with two control panels (11).

6. The lithium battery high and low temperature performance testing mechanism according to claim 1, characterized in that, The testing box (1) is made of transparent material.

7. The lithium battery high and low temperature performance testing mechanism according to claim 1, characterized in that, One end of the extension plate (6) is fixedly connected to the side wall of the support plate (5), and the other end is provided with a vertical plate (61). The side wall of the vertical plate (61) is provided with an installation cylinder (62). A spring (63) is provided inside the installation cylinder (62). A guide post (65) is provided on the side of the second clamping plate (64) near the installation cylinder (62). The guide post (65) is inserted into the installation cylinder (62) and connected to the spring (63).

8. The lithium battery high and low temperature performance testing mechanism according to claim 7, characterized in that, The first clamping plate (54) and the second clamping plate (64) are located on the same horizontal plane.

9. A lithium battery high and low temperature performance testing mechanism according to claim 7, characterized in that, The dimensions of the guide post (65) are adapted to the internal diameter of the mounting cylinder (62).

10. A lithium battery high and low temperature performance testing mechanism according to claim 1, characterized in that, The first clamping plate (54) and the second clamping plate (64) are provided with soft pads.

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