Battery cell testing tool capable of adjusting temperature according to requirements

Abstract

The utility model provides a battery cell testing tool with temperature adjustable according to requirements, which comprises a first clamping plate, a second clamping plate and a sensor fixing plate, a support column is arranged between the first clamping plate and the sensor fixing plate, and the second clamping plate is positioned between the first clamping plate and the sensor fixing plate; a pressure sensor is arranged between the sensor fixing plate and the second clamping plate; during testing, a temperature sensor for detecting the temperature of the battery cell is arranged on the battery cell, and the battery cell is clamped between the first clamping plate and the second clamping plate; the first clamping plate and the second clamping plate are each provided with a heating component and a temperature collector. When the battery cell testing device is used for testing the battery cell, the first clamping plate and the second clamping plate are heated through the heating component, and the temperature difference between the battery cell and the first clamping plate and the second clamping plate is reduced, so that the heat loss of the battery cell in the testing process is reduced, and the temperature state of the battery cell in the testing process is closer to the temperature state in an actual installation environment; therefore, the test result is more real and reliable.

Description

Technical Field

[0001] This utility model relates to the field of battery cell testing technology, and in particular to a battery cell testing fixture with adjustable temperature as needed. Background Technology

[0002] Existing battery cell expansion force testing fixtures include two steel or aluminum clamps. The battery cell to be tested is clamped between the two clamps, and one of the clamps is connected to a pressure sensor. During testing, the battery cell is energized, and its volume expands to a certain extent during the energization process. When the battery cell expands, the pressure on the clamps increases, and the clamps transmit the pressure to the pressure sensor. The pressure sensor collects and records the pressure changes, thereby realizing the detection of the battery cell expansion force.

[0003] However, the testing environment differs from the actual installation environment of the battery cell. In the testing environment, the battery cell is in a relatively open environment, and the steel or aluminum clamps have high thermal conductivity and surface area, which can dissipate the heat of the battery cell with high efficiency, resulting in good heat dissipation. In the actual installation environment, the battery cell is enclosed in a relatively closed module shell, with poor heat dissipation. The heat of the battery cell cannot be effectively dissipated, resulting in the temperature of the battery cell in the testing environment being much lower than that in the actual installation environment. The inconsistency in battery cell temperature between the two environments will cause a certain difference between the test results and the actual results. This makes it impossible for traditional battery cell expansion force testing fixtures to truly simulate the working temperature state of the battery cell in the actual installation environment. Therefore, the test results cannot accurately reproduce the expansion of the battery cell during actual operation, resulting in low reliability of the test results. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies and provide a battery cell testing fixture with adjustable temperature as needed.

[0005] The purpose of this utility model is achieved through the following technical solution: a battery cell testing fixture with adjustable temperature according to requirements, including a first clamping plate, a second clamping plate, and a sensor fixing plate. A support column is provided between the first clamping plate and the sensor fixing plate, and the second clamping plate is located between the first clamping plate and the sensor fixing plate. A pressure sensor is provided between the sensor fixing plate and the second clamping plate. During testing, a temperature sensor for detecting the temperature of the battery cell is provided on the battery cell, and the battery cell is clamped between the first clamping plate and the second clamping plate. Heating components and temperature acquisition devices are provided on both the first clamping plate and the second clamping plate.

[0006] Preferably, a buffer layer is provided between the battery cell and the first clamping plate, and between the battery cell and the second clamping plate.

[0007] Preferably, the material of the buffer layer is cushioning foam.

[0008] Preferably, the heating element is an electric heating element, which is disposed inside the first clamping plate and the second clamping plate; both the electric heating element and the temperature acquisition device are connected to the temperature control module, and the heating temperature of the electric heating element is controlled by the temperature control module.

[0009] Preferably, during testing, the temperature difference between the first and second clamping plates and the cell temperature is less than 5°C.

[0010] Preferably, the second clamping plate is provided with a guide hole corresponding to the support column, and the support column passes through the guide hole.

[0011] Preferably, the upper end of the support column is connected to the sensor fixing plate by a first fixing bolt, and the lower end of the support column is connected to the first clamping plate by a second fixing bolt.

[0012] Preferably, the pressure sensor is connected to the sensor mounting plate by a second fixing bolt.

[0013] The beneficial effects of this utility model are: when testing the battery cell, the heating component heats the first and second clamping plates, reducing the temperature difference between the battery cell and the first and second clamping plates, thereby reducing the heat loss of the battery cell during the testing process, making the temperature state of the battery cell during the test closer to the temperature state under the actual installation environment, thus making the test results more realistic and reliable. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a cross-sectional view of the present invention.

[0016] In the diagram: 1. First clamping plate, 2. Second clamping plate, 3. Sensor fixing plate, 4. Pressure sensor, 5. Support column, 6. First fixing bolt, 7. Second fixing bolt, 8. Temperature control module, 9. Buffer layer, 10. Heating component, 11. Battery cell. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0018] like Figures 1 to 2As shown, a battery cell testing fixture with adjustable temperature includes a first clamping plate 1, a second clamping plate 2, and a sensor fixing plate 3. A support column 5 is provided between the first clamping plate 1 and the sensor fixing plate 3, and the second clamping plate 2 is located between the first clamping plate 1 and the sensor fixing plate 3. A pressure sensor 4 is provided between the sensor fixing plate 3 and the second clamping plate 2. During testing, a temperature sensor for detecting the temperature of the battery cell 11 is provided on the battery cell 11, and the battery cell 11 is clamped between the first clamping plate 1 and the second clamping plate 2. A heating element 10 and a temperature acquisition device are provided on both the first clamping plate 1 and the second clamping plate 2.

[0019] In this invention, when testing the battery cell 11, the battery cell 11 is clamped between a first clamping plate 1 and a second clamping plate 2. The first clamping plate 1 and the second clamping plate 2 provide a pre-clamping force to the battery cell 11, and then the battery cell 11 is energized. During the test, the first clamping plate 1 and the second clamping plate 2 are heated by the heating component 10, so that the temperature of the first clamping plate 1 and the second clamping plate 2 is close to the temperature of the battery cell 11, reducing the temperature difference between the battery cell 11 and the first clamping plate 1 and the second clamping plate 2, thereby reducing the heat loss of the battery cell 11 during the test, and making the temperature state of the battery cell 11 during the test closer to the temperature state of the actual installation environment, thus making the test results more realistic and reliable. During the test, the temperature sensor on the battery cell 11 can detect the temperature of the battery cell 11 in real time, and the temperature acquisition devices set on the first clamping plate 1 and the second clamping plate 2 can detect the temperature of the first clamping plate 1 and the second clamping plate 2 in real time respectively. The heating temperature of the heating component 10 is adjusted to make the temperature of the first clamping plate 1 and the second clamping plate 2 close to the temperature of the battery cell 11. The pressure sensor 4 is used to collect the expansion force data of the battery cell 11 during the test.

[0020] In this embodiment, buffer layers 9 are provided between the battery cell 11 and the first clamping plate 1, and between the battery cell 11 and the second clamping plate 2. The buffer layer 9 is made of buffer foam. The thickness of the buffer layer 9 is 1-2 mm. The buffer foam has a certain elasticity, providing deformation space for the expansion of the battery cell 11 through compression and rebound, and transmitting the expansion force of the battery cell 11 to the first clamping plate 1 or the second clamping plate 2.

[0021] The heating element 10 is an electric heating element, which is disposed inside the first clamping plate 1 and the second clamping plate 2; the electric heating element and the temperature acquisition device are both connected to the temperature control module 8, and the heating temperature of the electric heating element is controlled by the temperature control module 8.

[0022] During testing, the temperature difference between the first clamping plate 1 and the second clamping plate 2 and the temperature of the battery cell 11 is less than 5℃. By controlling the temperature difference between the first clamping plate 1 and the second clamping plate 2 and the battery cell 11, the heat loss of the battery cell 11 during the testing process can be reduced, thus making the temperature state of the battery cell 11 during the testing process closer to the temperature state under actual installation environment.

[0023] The second clamping plate 2 is provided with guide holes corresponding to the support columns 5, and the support columns 5 pass through the guide holes. In this embodiment, four support columns 5 are provided between the first clamping plate 1 and the sensor fixing plate 3. The four support columns 5 are parallel to each other, and the second clamping plate 2 can move along the axial direction of the support columns 5.

[0024] The upper end of the support column 5 is connected to the sensor fixing plate 3 via the first fixing bolt 6, and the lower end of the support column 5 is connected to the first clamping plate 1 via the second fixing bolt 7. By adjusting the tightness of the first fixing bolt 6, the distance between the first clamping plate 1 and the sensor fixing plate 3 can be finely adjusted, thereby adjusting the pre-clamping force of the first clamping plate 1 and the second clamping plate 2 on the battery cell 11.

[0025] The pressure sensor 4 is connected to the sensor mounting plate 3 by the second fixing bolt 7.

[0026] This utility model is not limited to the above-described preferred embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in their shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this utility model.

Claims

1. A battery cell testing fixture with adjustable temperature as needed, characterized in that, It includes a first clamping plate, a second clamping plate, and a sensor fixing plate. A support column is provided between the first clamping plate and the sensor fixing plate, and the second clamping plate is located between the first clamping plate and the sensor fixing plate. A pressure sensor is provided between the sensor fixing plate and the second clamping plate. During testing, a temperature sensor for detecting the temperature of the battery cell is provided on the battery cell, and the battery cell is clamped between the first clamping plate and the second clamping plate. Heating components and temperature acquisition devices are provided on both the first clamping plate and the second clamping plate.

2. The cell testing fixture with adjustable temperature according to claim 1, characterized in that, A buffer layer is provided between the battery cell and the first clamping plate, and between the battery cell and the second clamping plate.

3. The cell testing fixture with adjustable temperature according to claim 2, characterized in that, The material of the buffer layer is cushioning foam.

4. The cell testing fixture with adjustable temperature according to claim 1, characterized in that, The heating element is an electric heating element, which is disposed inside the first clamping plate and the second clamping plate; both the electric heating element and the temperature acquisition device are connected to the temperature control module, which controls the heating temperature of the electric heating element.

5. A cell testing fixture with adjustable temperature according to claim 4, characterized in that, During testing, the temperature difference between the first and second clamping plates and the cell temperature was less than 5°C.

6. A cell testing fixture with adjustable temperature according to claim 1, characterized in that, The second clamping plate is provided with guide holes corresponding to the support column, and the support column passes through the guide holes.

7. A cell testing fixture with adjustable temperature according to claim 1, characterized in that, The upper end of the support column is connected to the sensor fixing plate by the first fixing bolt, and the lower end of the support column is connected to the first clamping plate by the second fixing bolt.

8. A cell testing fixture with adjustable temperature according to claim 1, characterized in that, The pressure sensor is connected to the sensor mounting plate by a second fixing bolt.

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