Battery cell inspection device and battery cell inspection method
By combining a heater unit and a camera unit in the cell inspection device, and utilizing infrared heating and image detection, the problem of electrolyte leakage detection is solved, improving the accuracy of cell inspection and the reliability of temperature detection. This method is suitable for the manufacture of electric vehicles and hybrid vehicles.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SK ON CO LTD
- Filing Date
- 2024-08-05
- Publication Date
- 2026-05-19
AI Technical Summary
In existing technologies, electrolyte leakage in battery cells cannot be effectively detected, leading to performance degradation and safety hazards, and it is impossible to improve the accuracy of temperature detection while ensuring the camera's field of view.
The system employs a combination of a support frame, a core camera, and a core heater unit. The heater unit irradiates the battery cell with infrared light, and the temperature change assists the camera in detecting electrolyte leakage. The core camera then captures images of the battery cell surface for inspection.
This technology improves the accuracy of cell temperature detection and the reliability of electrolyte leakage detection while ensuring the camera's field of view. It is suitable for the manufacture of electric and hybrid vehicles and reduces the environmental impact of climate change.
Smart Images
Figure CN122070474A_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to a battery cell inspection device and a battery cell inspection method. Background Technology
[0002] Battery cells used as secondary batteries may contain electrolyte. When electrolyte leaks to the outside of the cell, it can reduce the cell's performance and cause safety issues. Therefore, it is necessary to check the cell for electrolyte leakage. Summary of the Invention
[0003] (a) Technical problems to be solved One technical problem addressed by this disclosure is to provide a battery cell inspection device and method that can increase the temperature of the battery cell while ensuring the camera's field of view.
[0004] (II) Technical Solution According to the battery cell inspection apparatus disclosed herein, it may include: a carrier having an upper face; a core camera located above the carrier and facing the upper face of the carrier; and a core heater unit located between the carrier and the core camera, and including a heater module that irradiates infrared light onto the carrier, the core heater unit may have a heater opening through which the field of view of the core camera passes.
[0005] The battery cell inspection method disclosed herein may include: a heating step of heating the battery cell placed on a support frame; a temperature measurement step of measuring the temperature of the battery cell; a step of comparing the measured temperature with a reference temperature; and a step of inspecting the appearance of the battery cell.
[0006] (III) Beneficial Effects According to one embodiment of this disclosure, a battery cell inspection device and a battery cell inspection method can be provided that can improve the temperature of the battery cell while ensuring the camera's field of view.
[0007] The battery cell inspection device and method disclosed herein can be widely applied in the fields of electric vehicles, battery charging stations, and other green technologies that utilize batteries, such as solar power generation and wind power generation.
[0008] The battery cell inspection apparatus and method disclosed herein can be used in the manufacture of eco-friendly electric vehicles and hybrid vehicles that prevent climate change by suppressing air pollution and greenhouse gas emissions. Attached Figure Description
[0009] Figure 1It is a diagram showing how battery cells are placed on a support frame.
[0010] Figure 2 It is shown in Figure 1 The diagram shows the arrangement of the heater unit and camera unit on top of the support frame.
[0011] Figure 3 This is a diagram showing the upper surface of the heater unit.
[0012] Figure 4 It is shown Figure 3 A diagram showing the lower surface of the heater unit.
[0013] Figure 5 It is shown Figure 3 The lower surface of the heater unit is shown, along with a diagram of the outer heater module and the inner heater module.
[0014] Figure 6 This is a diagram showing the core heater unit, which includes multiple heater modules.
[0015] Figure 7 This is a diagram showing the layout of the core heater unit and the wing heater unit mounted on the support frame.
[0016] Figure 8 This is a block diagram illustrating a cell inspection apparatus according to an embodiment of the present disclosure.
[0017] Figure 9 This is a flowchart illustrating a cell inspection method according to an embodiment of the present disclosure. Detailed Implementation
[0018] The following is for reference Figures 1 to 9 This disclosure will be described in detail below. However, this is merely exemplary, and this disclosure is not limited to the specific embodiments described herein.
[0019] In this specification, the coordinate system may be a Cartesian coordinate system. For example, the forward and backward directions may be parallel to the X-axis. For example, the positive X-axis direction may represent forward. For example, the negative X-axis direction may represent backward.
[0020] For example, the up and down directions can be parallel to the Z-axis. For example, the positive Z-axis direction can represent upward. For example, the negative Z-axis direction can represent downward.
[0021] For example, the left and right directions can be parallel to the Y-axis. For example, the positive Y-axis direction can represent the left side (port side). For example, the negative Y-axis direction can represent the right side (starboard side). The Y-axis can be perpendicular to both the X-axis and the Z-axis.
[0022] Figure 1 It is a diagram showing how battery cells are placed on a support frame. Figure 2 It is shown in Figure 1 The diagram shows the arrangement of the heater unit and camera unit on top of the support frame.
[0023] Reference Figure 1 and Figure 2 The battery cell 20 may include a cell body 21 and electrode leads 22. The cell body 21 may include an electrode assembly (not shown). For example, the electrode assembly (not shown) may be wrapped or sealed in a pouch.
[0024] For example, a pouch can form the outer surface of the cell body 21. The pouch of the cell body 21 can be formed of a material containing a polymer. For example, the outer surface of the pouch of the cell body 21 can be formed of polypropylene (PP).
[0025] Electrolyte can be disposed inside the cell body 21. For example, after injecting electrolyte into the bag of the cell body 21, the bag of the cell body 21 can be sealed.
[0026] When the electrolyte of the cell body 21 leaks to the outside of the cell body 21, the cell 20 may have difficulty performing its normal function. That is, when the electrolyte of the cell body 21 is observed to be outside the cell body 21, the cell 20 can be judged as defective.
[0027] The cell body 21 can extend along its length. For example, the cell body 21 can extend along its front-to-back direction. For example, the length direction of the cell body 21 can be the front-to-back direction. For example, the length direction of the cell body 21 can be parallel to the X-axis.
[0028] The cell body 21 can be formed into a flat shape. For example, the cell body 21 can be formed with an upper surface and a lower surface. For example, the upper surface of the cell body 21 can face upward, and the lower surface of the cell body 21 can face downward. For example, the thickness of the cell body 21 can be the length of the cell body 21 in the vertical direction.
[0029] Electrode leads 22 may protrude from the cell body 21. For example, electrode leads 22 may extend from the cell body 21. For example, electrode leads 22 may protrude from the cell body 21 along its length. For example, electrode leads 22 may protrude from at least one of the front face and rear face of the cell body 21.
[0030] The battery cell inspection device 10 may include a carrier 100. For example, the carrier 100 may transport battery cells 20. For example, the carrier 100 may have an upper surface. Battery cells 20 may be placed on the upper surface of the carrier 100. The carrier 100 may be movable.
[0031] For example, the lower face of the cell body 21 may face and contact the upper surface of the support frame 100. For example, the upper face of the cell body 21 may face upwards. For example, the upper face of the cell body 21 may face at least one of the core camera 201 and the core heater unit 301.
[0032] The side surface of the cell body 21 can extend upward from the lower surface of the cell body 21 to connect to the upper surface of the cell body 21. The side surface of the cell body 21 can form the thickness of the cell body 21. For example, the thickness of the cell body 21 can be the vertical length of the side surface of the cell body 21.
[0033] The side surface of the cell body 21 can be shaped to extend along the length direction of the cell 20. For example, the length direction of the side surface of the cell body 21 can be the front-to-back direction.
[0034] For example, the end of the side of the cell body 21 may be adjacent to the electrode lead 22. For example, the front edge and rear edge of the side of the cell body 21 may be adjacent to a pair of electrode leads 22 respectively.
[0035] The cell inspection device 10 may include a camera unit 200. For example, the cell inspection device 10 may include a core camera 201. The camera unit 200 may include or represent the core camera 201.
[0036] The core camera 201 can be located above the support frame 100. For example, with the battery cell 20 placed on the support frame 100, the core camera 201 can be located above the battery cell 20.
[0037] The core camera 201 can capture images of the battery cell 20. For example, the core camera 201 can acquire images of the upper surface of the battery cell body 21. For example, based on the images acquired by the core camera 201, it can be determined whether electrolyte has leaked from the inside of the battery cell body 21 to the outside of the battery cell body 21.
[0038] The cell inspection device 10 may include a heater unit 300. For example, the cell inspection device 10 may include a core heater unit 301. The heater unit 300 may include or represent the core heater unit 301.
[0039] The core heater unit 301 can be disposed above the support frame 100. For example, when the battery cell 20 is placed on the support frame 100, the core heater unit 301 can be located above the battery cell body 21.
[0040] The core heater unit 301 can be located below the core camera 201. That is, the core heater unit 301 can be located between the core camera 201 and the cell body 21.
[0041] For example, the core heater unit 301 may be located between the core camera 201 and the support frame 100. The core heater unit 301 may be configured to ensure the field of view of the core camera 201 located above the core heater unit 301.
[0042] The core heater unit 301 can generate heat. For example, the core heater unit 301 can radiate heat downwards. At least a portion of the heat generated from the core heater unit 301 can be transferred to the cell body 21.
[0043] When heat is transferred to the cell body 21, the temperature of the outer surface of the cell body 21 can rise. Compared with the image of the cell body 21 when the outer surface of the cell body 21 is at room temperature, the image of the cell body 21 when the outer surface of the cell body 21 is at a higher temperature is more helpful in determining electrolyte leakage.
[0044] Figure 3 This is a diagram showing the upper surface of the heater unit. Figure 4 It is shown Figure 3 A diagram showing the lower surface of the heater unit. Figure 5 It is shown Figure 3 The lower surface of the heater unit is shown, along with a diagram of the outer heater module and the inner heater module.
[0045] Reference Figure 3 and Figure 4 The core heater unit 301 may include a heater body 310. The heater body 310 may have an upper surface and a lower surface.
[0046] For example, the upper surface 311 of the heater body can be an upper surface formed on the heater body 310. The upper surface 311 of the heater body can face the core camera 201 (see reference). Figure 2 ).
[0047] For example, the lower surface 312 of the heater body can be a lower surface formed on the heater body 310. The lower surface 312 of the heater body can face the cell 20 (see reference). Figure 2 ) and support frame 100 (refer to Figure 2 At least one of the following.
[0048] The core heater unit 301 may include a heater opening 320. The heater opening 320 may be an opening formed on the heater body 310. The heater opening 320 may be located at the core camera 201 (see reference). Figure 2 Below ).
[0049] Core Camera 201 (reference) Figure 2 The field of view (FOV) can pass through the heater opening 320 to reach the cell 20 (refer to...). Figure 2 Therefore, the core camera 201 (refer to...) Figure 2 It can photograph battery cell 20 (refer to). Figure 2 ).
[0050] The core heater unit 301 may include a heater module 330. The heater module 330 may be connected to or coupled to the heater body 310. For example, the heater module 330 may be connected to or coupled to the lower surface 312 of the heater body.
[0051] The heater module 330 may include at least one heating section 335. The heating section 335 can generate heat. For example, the heating section 335 may include a laser diode.
[0052] For example, heating section 335 can emit infrared light of a specific wavelength. For example, heating section 335 can emit long-wave infrared (LWIR). For example, heating section 335 can emit infrared light with wavelengths from 8µm to 14µm.
[0053] For example, multiple heating sections 335 may be disposed between the sides of the heater body 310 and the heater opening 320. For example, multiple heating sections 335 may be disposed along the outer edge of the heater opening 320. Multiple heating sections 335 may be disposed along the edge of the lower surface 312 of the heater body.
[0054] Reference Figure 3 and Figure 5 The heater module 330 can be provided in multiple ways. For example, the heater unit 300 may include multiple heater modules 330. For example, the heater unit 300 may include an outer heater module 330t and an inner heater module 330i. The heater module 330 may include or represent at least one of the outer heater module 330t and the inner heater module 330i.
[0055] The internal heater module 330i can be disposed along the outer edge of the heater opening 320. For example, the plurality of heating sections 335 included in the internal heater module 330i can be disposed along the outer edge of the heater opening 320.
[0056] The outer heater module 330t can be shaped to enclose the inner heater module 330i. For example, the outer heater module 330t can be disposed between the edge of the heater body 310 and the inner heater module 330i. The outer heater module 330t can be spaced apart from the inner heater module 330i. The outer heater module 330t can be spaced apart from the edge of the heater body 310.
[0057] The heater module 330 can be formed as a ring. For example, the heater module 330 can be formed as a square ring. For example, the heater module 330 can be formed as a square ring with rounded corners.
[0058] Figure 6 This is a diagram showing the core heater unit, which includes multiple heater modules.
[0059] Reference Figure 6 The heater unit 300 may include multiple heater modules 330. For example, the heater unit 300 may include a first heater module 330a, a second heater module 330b, a third heater module 330c, and a fourth heater module 330d.
[0060] The heater module 330 may include or represent at least one of the first heater module 330a, the second heater module 330b, the third heater module 330c, and the fourth heater module 330d.
[0061] Multiple heater modules 330 may surround the heater opening 320. For example, multiple heater modules 330 may be arranged along the heater opening 320. The heater opening 320 may be formed by multiple heater modules 330.
[0062] For example, the heater opening 320 can be a space formed by multiple heater modules 330. For example, the heater opening 320 can be a gap formed by multiple heater modules 330.
[0063] For example, multiple heater modules 330 may be arranged with the heater opening 320 spaced apart. For example, the heater opening 320 may be located between the first heater module 330a and the third heater module 330c. For example, the heater opening 320 may be located between the second heater module 330b and the fourth heater module 330d.
[0064] Multiple heater modules 330 can be arranged sequentially. For example, multiple heater modules 330 can be arranged sequentially along the heater opening 320. For example, the first heater module 330a, the second heater module 330b, the third heater module 330c, and the fourth heater module 330d can be arranged sequentially along the heater opening 320.
[0065] Figure 7 This is a diagram showing the layout of the core heater unit and the wing heater unit mounted on the support frame.
[0066] Reference Figure 7 The cell inspection device 10 may include a wing heater unit 302. The heater unit 300 may include or represent at least one of the core heater unit 301 and the wing heater unit 302.
[0067] The wing heater unit 302 may be adjacent to the core heater unit 301. For example, the wing heater unit 302 may be adjacent to the edge portion of the core heater unit 301.
[0068] The wing heater unit 302 may include a heater body 310 (see reference). Figure 3 The heater body 310 of the wing heater unit 302 (see reference) Figure 3 It can form the shape of a plate.
[0069] The heater body 310 of the wing heater unit 302 (see reference) Figure 3 It can be connected to the heater body 310 of the core heater unit 301 (see reference). Figure 3 This forms an inclination or angle.
[0070] For example, the heater body 310 of the wing heater unit 302 (see reference) Figure 3 The lower surface of the core heater unit 301 and the heater body 310 (see reference) Figure 3The lower surface of a can form an obtuse angle.
[0071] For example, the heater body 310 of the wing heater unit 302 (see reference) Figure 3 The surface can be tilted downwards. For example, the heater body 310 of the wing heater unit 302 (see reference) Figure 3 It can be tilted to face the side (or thickness) of the cell body 21.
[0072] The wing heater unit 302 may include a heater module 330 (see reference). Figures 4 to 6 ). The heater module 330 of the wing heater unit 302 (see reference) Figures 4 to 6 It can emit infrared rays toward the upper surface and sides of the battery cell body 21.
[0073] The cell inspection device 10 may include a wing camera 202. The camera unit 200 may include or represent at least one of the core camera 201 and the wing camera 202.
[0074] The wing-shaped camera 202 can face the side of the battery cell body 21. For example, the wing-shaped camera 202 can capture images of the side of the battery cell body 21.
[0075] Multiple wing heater units 302 can be provided. For example, a pair of wing heater units 302 can emit infrared rays toward a pair of sides of the battery cell body 21, respectively.
[0076] For example, the core heater unit 301 may be located between a pair of wing heater units 302. For example, the core heater unit 301 and the pair of wing heater units 302 may be formed in a downwardly recessed shape.
[0077] Multiple wing cameras 202 may be provided. For example, a pair of wing cameras 202 may face a pair of sides of the cell body 21 respectively and acquire images. For example, the support frame 100 may be located between a pair of wing cameras 202.
[0078] Figure 8 This is a block diagram illustrating a cell inspection apparatus according to an embodiment of the present disclosure.
[0079] Reference Figures 1 to 8 The battery cell inspection device 10 may include a control unit 410. The control unit 410 can perform calculations. The control unit 410 can process signals. For example, the control unit 410 can send and receive signals. For example, the control unit 410 can generate signals.
[0080] For example, the control unit 410 can be implemented by at least one of a computer, a processor, a server, a circuit board (CB), or a printed circuit board (PCB).
[0081] The battery cell inspection device 10 may include an input unit 420. The input unit 420 may acquire input from a user or the like. The input unit 420 may generate a first signal S1 and transmit it to the control unit 410. The first signal S1 may include information related to the input acquired by the input unit 420.
[0082] The cell inspection device 10 may include a sensor unit 430. The sensor unit 430 may include a position sensor 431. For example, the position sensor 431 may measure the position of the support frame 100.
[0083] For example, position sensor 431 can measure the position of battery cell 20 relative to carrier frame 100. For example, position sensor 431 can measure the position of heater unit 300 relative to carrier frame 100. For example, position sensor 431 can measure the position of camera unit 200 relative to carrier frame 100.
[0084] The position sensor 431 can generate a second signal S2 and transmit it to the control unit 410. The second signal S2 may include information related to at least one of the positions of the battery cell 20 relative to the support frame 100, the position of the heater unit 300 relative to the support frame 100, and the position of the camera unit 200 relative to the support frame 100.
[0085] The sensor unit 430 may include a temperature sensor 432. The temperature sensor 432 can measure the temperature of the battery cell 20. For example, the temperature sensor 432 can measure the temperature of the outer surface of the battery cell body 21. For example, the temperature sensor 432 can measure the temperature of the outer surface of the battery cell body 21 in a non-contact manner.
[0086] Temperature sensor 432 can generate a third signal S3 and transmit it to control unit 410. The third signal S3 may include information related to the temperature of the outer surface of the cell body 21.
[0087] The control unit 410 can generate output signals S4, S5, and S6 based on input signals S1, S2, and S3. Input signals S1, S2, and S3 may include or represent at least one of the first signal S1, the second signal S2, and the third signal S3. Output signals S4, S5, and S6 may include or represent at least one of the fourth signal S4, the fifth signal S5, and the sixth signal S6.
[0088] The control unit 410 can transmit the fourth signal S4 to the support frame 100. The fourth signal S4 may include command information related to the operation of the support frame 100. The support frame 100 can be operated according to the fourth signal S4. For example, the support frame 100 can move or rotate according to the fourth signal S4.
[0089] The control unit 410 can transmit the fifth signal S5 to the heater unit 300. The fifth signal S5 may include command information related to the operation of the heater unit 300. The heater unit 300 can operate according to the fifth signal S5.
[0090] For example, the power of the heater module 330 can be changed according to the fifth signal S5. The intensity of the infrared radiation emitted from the heater module 330 can be changed according to the power of the heater module 330.
[0091] The control unit 410 can transmit the sixth signal S6 to the camera unit 200. The sixth signal S6 may include command information related to the operation of the camera unit 200. For example, the camera unit 200 can take a picture of the battery cell 20 according to the sixth signal S6.
[0092] The camera unit 200 can transmit the seventh signal S7 to the control unit 410. The seventh signal S7 may include information related to the image acquired by the camera unit 200.
[0093] The control unit 410 can receive the seventh signal S7 from the camera unit 200. The control unit 410 can determine the state of the battery cell 20 based on the seventh signal S7.
[0094] Figure 9 This is a flowchart illustrating a cell inspection method according to an embodiment of the present disclosure.
[0095] Reference Figures 1 to 9 The cell inspection method S10 may include an alignment step S100. In this step S100, a second signal S2 may be transmitted to the control unit 410.
[0096] In step S100, the position of the support frame 100 relative to the heater unit 300 can be aligned. In step S100, the position of the camera unit 200 relative to the support frame 100 can be aligned. In step S100, the position of the heater unit 300 relative to the camera unit 200 can be aligned.
[0097] The cell inspection method S10 may include a heating step S200. In this step S200, the control unit 410 may transmit a fifth signal S5 to the heater unit 300.
[0098] In step S200, the heater unit 300 can operate according to the fifth signal S5. For example, in step S200, the heater unit 300 can irradiate infrared rays onto the battery cell 20.
[0099] The cell inspection method S10 may include a temperature measurement step S300. The temperature measurement step S300 may be performed in parallel with the heating step S200. In this step S300, the temperature sensor 432 may measure the temperature of the cell 20.
[0100] For example, in step S300, temperature sensor 432 can measure the temperature of the outer surface of the cell body 21. For example, in step S300, temperature sensor 432 can generate a third signal S3.
[0101] The cell inspection method S10 may include a step S400 of comparing the measured temperature with a reference temperature. The measured temperature may be the temperature extracted from the third signal S3. For example, the measured temperature may be the temperature of the cell body 21 measured by the temperature sensor 432. This step S400 may be referred to as "the step of determining whether the temperature of the cell is an appropriate temperature".
[0102] For example, in step S400, the control unit 410 can compare the measured temperature included in the third signal S3 with a reference temperature. The reference temperature can be higher than room temperature. The reference temperature can be a temperature of the cell body 21 that is relatively easy to measure.
[0103] When it is determined that the measured temperature is lower than the reference temperature, the control unit 410 may execute the temperature measurement step S300. When it is determined that the measured temperature is higher than the reference temperature, the control unit 410 may execute the appearance inspection step S500.
[0104] The cell inspection method S10 may include a visual inspection step S500. In this step S500, the camera unit 200 may take a picture of the cell 20. For example, when it is determined that the measured temperature is above the reference temperature, the control unit 410 may control the camera unit 200 to acquire a seventh signal S7.
[0105] After the visual inspection step S500 is completed, the cell inspection method S10 can be ended.
[0106] The above description is merely an example of applying the principles of this disclosure, and other configurations may be included without departing from the scope of this disclosure.
Claims
1. A battery cell inspection device, comprising: The support frame has an upper surface. The core camera is located above the support frame and faces the upper surface of the support frame; as well as The core heater unit, located between the support frame and the core camera, includes a heater module that irradiates infrared light onto the support frame. The core heater unit has a heater opening through which the field of view of the core camera passes.
2. The cell inspection device according to claim 1, wherein, The core heater unit further includes a heater body, which is located between the support frame and the core camera. The heater opening is formed on the heater body.
3. The cell inspection device according to claim 2, wherein, The heater module includes multiple heating sections arranged along the heater opening and each emitting infrared rays.
4. The cell inspection device according to claim 3, wherein, The plurality of heating sections are arranged sequentially along the opening of the heater.
5. The cell inspection device according to claim 3, wherein, The plurality of heating sections form at least one ring.
6. The cell inspection device according to claim 3, wherein, The heater module includes: An internal heater module is disposed along the opening of the heater; and An external heater module is located between the edge of the heater body and the internal heater module.
7. The cell inspection device according to claim 6, wherein, The inner heater module and the outer heater module are separated from each other and each forms a ring.
8. The cell inspection device according to claim 1, wherein, The core heater unit includes multiple heater modules, which are spaced apart from each other and arranged sequentially along the heater opening.
9. The cell inspection device according to claim 8, wherein, Each of the plurality of heater modules includes at least one heating section that emits infrared radiation.
10. The cell inspection device according to claim 1, further comprising: The wing heater unit, adjacent to the core heater unit, faces the support frame at an angle and irradiates the support frame with infrared light.
11. The cell inspection device according to claim 10, further comprising: A pair of wing heater units, The core heater unit is located between the pair of wing heater units.
12. The cell inspection device according to claim 11, wherein, The pair of wing heater units and the core heater unit are recessed downwards.
13. The cell inspection device according to claim 11, further comprising: A pair of wing-mounted cameras facing the sides of the support frame. The support frame is located between the pair of wing cameras.
14. The cell inspection device according to claim 1, further comprising: The input section is used to acquire input. The control unit is connected to the input unit and receives a first signal from the input unit; as well as A temperature sensor measures the temperature of the battery cell placed on the upper surface of the support frame and sends a third signal to the control unit.
15. The cell inspection device according to claim 14, wherein, The third signal includes the temperature information measured by the temperature sensor. The control unit controls the core heater unit and the core camera based on the input signals. The input signal includes at least one of the first signal and the third signal.
16. The cell inspection device according to claim 15, wherein, When the temperature of the battery cell is above a reference temperature according to the third signal, the control unit controls the core camera to acquire an image of the battery cell.
17. A method for inspecting battery cells, comprising: The heating step involves heating the battery cells placed on the support frame; Temperature measurement steps for measuring the temperature of the battery cell; The step of comparing the measured temperature with the reference temperature; as well as The steps for inspecting the appearance of the battery cell.
18. The cell inspection method according to claim 17, wherein, The heating step and the temperature measurement step are performed in parallel.
19. The cell inspection method according to claim 18, wherein, When the measured temperature is above the reference temperature, the visual inspection step is performed. When the measured temperature is lower than the reference temperature, the temperature measurement step is performed.
20. The cell inspection method according to claim 18, wherein, Prior to the heating step, a step is included in aligning the support frame with respect to the position of the heater unit that heats the battery cell.