High-precision pressurizing and heating charge-discharge clamp compatible with soft package and steel shell battery cell

Abstract

The invention provides a high-precision pressurizing and heating charge-discharge clamp compatible with a soft package battery cell and a steel shell battery cell. The high-precision pressurizing and heating charge-discharge clamp comprises a fixed bottom plate; the force bearing mechanism is mounted on the fixed bottom plate; the movable push plate mechanism is mounted on the front side of the force bearing mechanism; the blister box cell assembly is positioned between the movable push plate mechanism and the bearing mechanism; the push plate transmission mechanism is connected with the movable push plate mechanism; the driving mechanism is connected with the push plate transmission mechanism; and the charging and discharging probe mechanism is arranged above the force bearing mechanism and is opposite to the blister box battery core assembly. The high-precision pressurizing, heating and charging and discharging clamp compatible with the soft package and the steel shell battery cell is simple in structure and ingenious in design, and through innovative structural design of the force bearing mechanism, the movable push plate mechanism, the blister box battery cell assembly, the push plate transmission mechanism and the charging and discharging probe mechanism, one-time testing of pressurizing, heating and charging and discharging of the battery cell can be achieved; and the measurement precision and the efficiency are high.

Description

Technical Field

[0001] The present invention relates to the technical field of battery production, and in particular to a high-precision pressurized heating charging and discharging fixture that is compatible with soft-pack and steel-shell battery cells. Background Art

[0002] With the continuous advancement of science and technology and the widespread application of consumer lithium batteries, the technical competition in the 3C consumer lithium battery industry has become increasingly fierce. The industry has higher and higher capacity requirements for consumer lithium batteries, more extreme capacity utilization, more accurate capacity, smaller size, lighter weight, and higher safety and other performance requirements. 3C consumer lithium batteries mainly include two types of consumer soft-pack batteries and steel-shell batteries. The steel-shell and soft-pack battery cells need to be tested for pressurization and heating charge and discharge during the manufacturing process. In the existing process, the pressurization charge and discharge test and the heating charge and discharge test are divided into two different processes. The battery needs to be moved to the pressurization charge and discharge test process first, and then moved to the heating charge and discharge test process, which leads to low efficiency of pressurization and heating charge and discharge. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention proposes a high-precision pressurized heating charging and discharging fixture that is compatible with soft-pack and steel-shell battery cells, which can realize a one-time test of pressurized heating charging and discharging, and has high measurement accuracy and efficiency.

[0004] To realize the above technical scheme, the present invention provides a high-precision pressurized heating charging and discharging fixture compatible with soft-pack and steel-shell battery cells, comprising: a fixed base plate; a load-bearing mechanism installed on the fixed base plate, the load-bearing mechanism comprising a reference plate vertically installed on the fixed base plate, a pressure sensor is installed on the front side of the reference plate, a heat insulation plate is installed on the front side of the pressure sensor, a positioning load-bearing plate is installed on the front side of the heat insulation plate, a first heating film is installed on the front side of the positioning load-bearing plate, a first thermal conductive silicone pad is installed on the front side of the first heating film, a horizontal test probe is installed on the upper side of the positioning load-bearing plate, and the probe passes through the first heating film and the first thermal conductive silicone pad in sequence in the horizontal direction and extends forward; a movable push plate mechanism, the movable push plate mechanism comprising two parallel and spaced apart horizontally fixed on the base plate A guide rod, a movable push plate is fixed on the guide rod through a linear bearing, a second heating film is installed on the rear side of the movable push plate, a second thermally conductive silicone pad is installed on the rear side of the second heating film, a blister box battery cell assembly, the blister box battery cell assembly is fixed on the positioning load-bearing plate after passing through the first thermally conductive silicone pad and the first heating film through a step pin and is abutted against the front end of the horizontal test probe, and the blister box battery cell assembly is located between the movable push plate mechanism and the load-bearing mechanism; a push plate transmission mechanism, the push plate transmission mechanism is installed on the fixed bottom plate and is connected to the movable push plate in the movable push plate mechanism through a floating joint; a driving mechanism, the driving mechanism is connected to the push plate transmission mechanism; a charging and discharging probe mechanism, the charging and discharging probe mechanism is installed above the load-bearing mechanism and is arranged directly opposite to the blister box battery cell assembly.

[0005] In the above technical scheme, during actual operation, the blister box battery cell assembly is fixed on the positioning bearing plate after the step pin passes through the first thermally conductive silicone pad and the first heating film, and then the driving mechanism drives the push plate transmission mechanism to push the movable push plate in the movable push plate mechanism to move forward along the guide rod, so that the movable push plate presses the blister box battery cell assembly, and the pressure sensor in the bearing mechanism can accurately detect the pressure on the blister box battery cell assembly, so that it can be fed back to the driving mechanism to accurately control the test pressure. When the preset pressure is reached, the battery cells in the blister box battery cell assembly can be pressurized and charged and discharged through the charge and discharge probe mechanism. In addition, when the blister box battery cell assembly is pressed, the blister box battery cell assembly is heated by the first heating film installed on the front side of the positioning bearing plate and the second heating film on the rear side of the movable push plate. When the blister box battery cell assembly reaches the set test temperature, the battery cells in the blister box battery cell assembly can be heated and charged and discharged through the charge and discharge probe mechanism. In addition, the blister box battery cell assembly can also be subjected to charge and discharge tests while being pressurized and heated, realizing functions that cannot be achieved by existing testing devices.

[0006] Preferably, the charging and discharging probe mechanism includes a support plate, the support plate is fixed on the top of the reference plate, a linear slide is installed on the top of the support plate in the transverse direction, a transverse slide is installed on the linear slide, a sliding cylinder is installed horizontally on the support plate in the transverse direction and is connected to the transverse slide, a crimping cylinder arranged vertically downward is installed at the front end of the transverse slide, a probe mounting plate is installed on the telescopic shaft of the crimping cylinder, and a plurality of longitudinal test probes arranged vertically downward are installed on the probe mounting plate. In actual operation, the transverse slide can be driven to move on the linear slide by the sliding cylinder, so as to accurately control the transverse position of the longitudinal test probe installed on the transverse slide, and the longitudinal position of the longitudinal test probe can be driven by the crimping cylinder, thereby realizing the control of the transverse and longitudinal positions of the longitudinal test probe, so as to accurately realize the alignment detection of the blister box battery core assembly.

[0007] Preferably, the left and right sides of the probe mounting plate are connected to the transverse slide plate through sliding shafts respectively, and linear bearings are installed at the connection between the sliding shaft and the transverse slide plate to enhance the stability of the probe mounting plate during longitudinal movement.

[0008] Preferably, the blister box battery core assembly includes a blister box and a battery core clamped in the blister box. The blister box is fixed on a positioning bearing plate after passing through a first thermally conductive silicone pad and a first heating film via a step pin to facilitate positioning and installation of the battery core and the blister box.

[0009] Preferably, the blister box includes a front shell and a rear shell, the front shell is provided with a hanging hole for docking with a step pin, the rear shell is embedded in the front shell, the battery cell is clamped between the front shell and the rear shell, the front shell is also provided with a battery cell center hole and a plurality of back holes, and the side of the front shell is also provided with a side block corresponding to the horizontal test probe on the load-bearing mechanism. In actual work, it is only necessary to clamp the battery cell between the front shell and the rear shell of the blister box, and then fix the blister box on the positioning load-bearing plate through the step pin, which greatly facilitates the loading and replacement of the battery cell and the blister box.

[0010] Preferably, the push plate transmission mechanism includes a pad, the pad is mounted on a fixed bottom plate, a slide rail is arranged on the pad, a slide plate is mounted on the slide rail, a transmission screw is arranged in parallel with the slide rail, the transmission screw and the slide plate are connected by a screw pair, and the slide plate is connected to the movable push plate by a floating joint. In actual operation, the slide plate can be accurately driven to move forward and backward on the slide rail through the cooperation between the transmission screw and the screw pair, and the movable push plate can be accurately pushed forward and backward through the floating joint, so that the movable push plate can be accurately controlled to exert appropriate pressure on the blister box battery core assembly.

[0011] Preferably, the driving mechanism comprises a servo motor, and the output shaft of the servo motor is connected to the end of the transmission screw rod. In actual operation, the servo motor drives the transmission screw rod to rotate, thereby providing power for the forward and backward movement of the movable push plate.

[0012] The beneficial effect of the high-precision pressurized heating charging and discharging fixture compatible with soft-pack and steel-shell batteries provided by the present invention is that the high-precision pressurized heating charging and discharging fixture compatible with soft-pack and steel-shell batteries has a simple structure and a clever design. Through the innovative structural design of the load-bearing mechanism, the movable push plate mechanism, the blister box battery assembly, the push plate transmission mechanism and the charge and discharge probe mechanism, a one-time test of the battery cell pressurized heating charging and discharging can be realized, and the measurement accuracy and efficiency are high. In actual work, the blister box battery assembly is fixed on the positioning load-bearing plate after the step pin penetrates the first thermal conductive silicone pad and the first heating film, and then the driving mechanism drives the push plate transmission mechanism to push the movable push plate in the movable push plate mechanism to move forward along the guide rod, so that the movable push plate presses the blister box battery assembly, and the pressure sensor in the load-bearing mechanism can accurately detect the pressure borne by the blister box battery assembly, so that the pressure can be fed back to the driving mechanism to accurately control the test pressure. When the preset pressure is reached, the battery cell in the blister box battery assembly can be pressurized and charged and discharged through the charge and discharge probe mechanism. In addition, when the blister box battery cell assembly is compressed, the blister box battery cell assembly is heated by the first heating film installed on the front side of the positioning bearing plate and the second heating film on the rear side of the movable push plate. When the blister box battery cell assembly reaches the set test temperature, the battery cells in the blister box battery cell assembly can be heated and charged and discharged through the charge and discharge probe mechanism. In addition, the blister box battery cell assembly can also be charged and discharged while pressurizing and heating, realizing functions that cannot be achieved by existing testing devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0014] Figure 2 It is a side view of the present invention.

[0015] Figure 3 It is a top view of the present invention.

[0016] Figure 4 It is a cross-sectional view of the installation location of the blister box battery core assembly in the present invention.

[0017] Figure 5 It is a schematic diagram of the three-dimensional structure of the charge and discharge probe mechanism in the present invention.

[0018] Figure 6 It is a three-dimensional structural schematic diagram of the blister box battery core assembly in the present invention.

[0019] In the figure: 1. Charge and discharge probe mechanism; 11. Support plate; 12. Linear slide rail; 13. Sliding cylinder; 14. Horizontal slide plate; 15. Linear bearing; 16. Sliding shaft; 17. Crimping cylinder; 18. Longitudinal test probe; 19. Probe mounting plate; 2. Blister box battery cell assembly; 21. Front shell; 22. Rear shell; 23. Hanging hole; 24. Side block; 25. Back hole; 26. Battery cell center hole; 3. Load-bearing mechanism; 31. Reference plate; 32. Pressure sensor; 33. Heat insulation board; 34. Positioning Load-bearing plate; 35, lateral test probe; 36, first thermally conductive silicone pad; 37, first heating film; 4, movable push plate mechanism; 41, movable push plate; 42, second heating film; 43, second thermally conductive silicone pad; 44, linear bearing; 45, guide rod; 46, floating joint; 5, push plate transmission mechanism; 51, pad; 52, slide rail; 53, screw pair; 54, transmission screw; 55, screw joint; 56, slide plate; 6, driving mechanism; 61, servo motor; 62, motor mounting plate; 7, fixed base plate. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary persons in the art without creative work are within the scope of protection of the present invention.

[0021] Embodiment: A high-precision pressurized heating charging and discharging fixture compatible with soft-pack and steel-shell battery cells.

[0022] Reference Figures 1 to 5 As shown, a high-precision pressurized heating charging and discharging fixture compatible with soft-pack and steel-shell battery cells includes:

[0023] Fix the bottom plate 7.

[0024] A load-bearing mechanism 3 is installed on the fixed base plate 7, and the load-bearing mechanism 3 includes a reference plate 31 vertically installed on the fixed base plate 7, a pressure sensor 32 is installed on the front side of the reference plate 31, a heat insulation plate 33 is installed on the front side of the pressure sensor 32, a positioning load-bearing plate 34 is installed on the front side of the heat insulation plate 33, and the heat insulation plate 33 is located between the pressure sensor 32 and the positioning load-bearing plate 34 to ensure that the heat of the subsequent heating film does not affect the normal operation of the pressure sensor 32. A first heating film 37 is installed on the front side of the positioning load-bearing plate 34. A first thermally conductive silicone pad 36 is installed on the front side of a heating film 37. During actual operation, the first heating film 37 is used to generate heat. The first thermally conductive silicone pad 36 plays a good buffering role and transfers the heat of the first heating film 37 to the blister box battery cell assembly 2. A transverse test probe 35 is installed laterally on the positioning bearing plate 34, which passes through the first heating film 37 and the first thermally conductive silicone pad 36 in sequence and extends forward. The transverse test probe 35 can be connected to the battery cell in the blister box battery cell assembly 2 to test the current and voltage changes of the blister box battery cell assembly 2.

[0025] The movable push plate mechanism 4 includes two parallel and spaced guide rods 45 fixed on the reference plate 31 along the transverse direction, the movable push plate 41 is fixed on the guide rod 45 through a linear bearing 44, a second heating film 42 is installed on the rear side of the movable push plate 41, and a second thermal conductive silicone pad 43 is installed on the rear side of the second heating film 42; in actual operation, the function of the movable push plate mechanism 4 is to apply appropriate pressure to the blister box battery cell assembly 2 located on the load-bearing mechanism 3, and the heating control of the blister box battery cell assembly 2 is realized through the cooperation between the second heating film 42 and the first heating film 37.

[0026] The blister box battery core assembly 2 is fixed on the positioning bearing plate 34 after the step pin penetrates the first thermal conductive silicone pad 36 and the first heating film 37 and abuts against the front end of the horizontal test probe 35, and the blister box battery core assembly 2 is located between the movable push plate mechanism 4 and the bearing mechanism 3. The blister box battery core assembly 2 includes a blister box and a battery core clamped in the blister box. The blister box is fixed on the positioning bearing plate 34 after the step pin penetrates the first thermal conductive silicone pad 36 and the first heating film 37 to facilitate the positioning and installation of the battery core and the blister box. The blister box includes a front shell 21 and a rear shell 22. The front shell 21 is provided with a hanging hole 23 for docking with a step pin. The rear shell 22 is embedded in the front shell 21. The battery cell is clamped between the front shell 21 and the rear shell 22. The front shell 21 is also provided with a battery cell center hole 26 and a plurality of back holes 25. The side of the front shell 21 is also provided with a side block 24 corresponding to the horizontal test probe 35 on the load-bearing mechanism 3. In actual work, it is only necessary to clamp the battery cell between the front shell 21 and the rear shell 22 of the blister box, and then fix the blister box on the positioning load-bearing plate 34 through the step pin, which greatly facilitates the loading and replacement of the battery cell and the blister box.

[0027] The push plate transmission mechanism 5 is installed on the fixed bottom plate 7 and connected to the movable push plate 41 in the movable push plate mechanism 4 through the floating joint 46. The push plate transmission mechanism 5 includes a backing plate 51, which is installed on the fixed bottom plate 7, and a slide rail 52 is arranged on the backing plate 51. A slide plate 56 is installed on the slide rail 52. A transmission screw 54 is arranged parallel to the slide rail 52. The transmission screw 54 and the slide plate 56 are connected through a screw pair 53. The slide plate 56 is connected to the movable push plate 41 through the floating joint 46. In actual operation, the slide plate 56 can be accurately driven to move forward and backward on the slide rail 52 through the cooperation between the transmission screw 54 and the screw pair 53, and the movable push plate 41 can be accurately pushed forward and backward through the floating joint 46, so that the movable push plate 41 can be accurately controlled to apply appropriate pressure to the blister box battery core assembly 2. The function of the push plate transmission mechanism 5 is to make linear motion, convert the output torque into linear motion force and transmit it to the movable push plate 41 through the floating joint 46 to pressurize the blister box battery core assembly 2, and ensure that the force acting on the movable push plate 41 is a linear vertical force.

[0028] The driving mechanism 6 includes a servo motor 61, which is installed on the motor mounting plate 62 in the horizontal direction, and the output shaft of the servo motor 61 is connected to the end of the transmission screw 54. In actual operation, the servo motor 61 drives the transmission screw 54 to rotate, thereby providing power for the forward and backward movement of the movable push plate 41. The servo motor 61 has a better control effect. The torque generated can be transmitted to the floating joint 46 through the coupling and the transmission screw 54 to ensure the linear motion under force, so that the point of force is located at the center of the battery cell.

[0029] A charge and discharge probe mechanism 1 is installed above the load-bearing mechanism 3 and is arranged opposite to the blister box battery cell assembly 2. The charge and discharge probe mechanism 1 includes a support plate 11, which is fixed on the top of the reference plate 31, a linear slide rail 12 is installed on the top of the support plate 11 in the horizontal direction, a horizontal slide plate 14 is installed on the linear slide rail 12, a sliding cylinder 13 is installed horizontally on the support plate 11 in the horizontal direction and is connected to the horizontal slide plate 14, a crimping cylinder 17 is installed vertically downward at the front end of the horizontal slide plate 14, a probe mounting plate 19 is installed on the telescopic shaft of the crimping cylinder 17, and two longitudinal test probes 18 are installed on the probe mounting plate 19 in the vertical direction. In actual operation, the transverse slide 14 can be driven by the sliding cylinder 13 to move on the linear slide 12, so as to accurately control the transverse position of the longitudinal test probe 18 installed on the transverse slide 14, and the longitudinal position of the longitudinal test probe 18 can be driven by the crimping cylinder 17, so as to realize the control of the transverse and longitudinal positions of the longitudinal test probe 18, so as to accurately realize the alignment detection of the blister box battery cell assembly 2. The left and right sides of the probe mounting plate 19 are respectively connected to the transverse slide 14 by the sliding shaft 16, and the linear bearing 15 is installed at the connection between the sliding shaft 16 and the transverse slide 14 to enhance the stability of the probe mounting plate 19 during longitudinal movement. In the present invention, the longitudinal test probe 18 is compatible with the charging and discharging voltage connection of the soft-pack battery cell and the steel shell battery cell, and when different battery cells are crimped, the two states are automatically switched by the cylinder without interfering with each other, meeting the battery cell compatibility and not affecting the measurement pressure measurement accuracy.

[0030] In this embodiment, the high-precision pressure sensor 32, the heat insulation plate 33, the positioning bearing plate 34, the first heating film 37, and the first thermally conductive silicone sheet 36 are sequentially installed on the reference plate 31 and do not contact other mechanisms, ensuring that the detection force of the pressure sensor 32 is completely derived from the pressure of the battery cell in the blister box battery cell assembly 2, and ensuring that the pressure repetition accuracy of a single battery cell is within ±0.5kgf. Moreover, the force center of the high-precision pressure sensor 32 coincides with the center position of the battery cell in the blister box battery cell assembly 2, and the coincidence is achieved by positioning the battery cell. In this embodiment, the force point of the ball-head floating joint 46 is located at the center of the movable push plate 41, and the center point coincides with the center of the battery cell and the center of the pressure sensor 32, which can ensure the uniformity of force and improve the accuracy of pressurization.

[0031] The high-precision pressurized heating charging and discharging fixture compatible with soft-pack and steel-shell batteries has a simple structure and an ingenious design. Through the innovative structural design of the load-bearing mechanism 3, the movable push plate mechanism 4, the blister box battery assembly 2, the push plate transmission mechanism 5 and the charging and discharging probe mechanism 1, a one-time test of pressurized heating charging and discharging of the battery cell can be achieved with high measurement accuracy and efficiency. During actual operation, the blister box battery cell assembly 2 is fixed on the positioning bearing plate 34 after passing through the first thermal conductive silicone pad 36 and the first heating film 37 through the step pin, and then the servo motor 61 in the driving mechanism 6 drives the push plate transmission mechanism 5 to push the movable push plate 41 in the movable push plate mechanism 4 to move forward along the guide rod 45, so that the movable push plate 41 presses the blister box battery cell assembly 2, and the pressure sensor 32 in the bearing mechanism 3 can accurately detect the pressure on the blister box battery cell assembly 2, so that it can be fed back to the servo motor 61 in the driving mechanism 6 to accurately control the test pressure. When the preset pressure is reached, the battery cells in the blister box battery cell assembly 2 can be pressurized for charging and discharging test through the charging and discharging probe mechanism 1. In addition, when the blister box battery cell assembly 2 is compressed, the blister box battery cell assembly 2 is heated by the first heating film 37 installed on the front side of the positioning bearing plate 34 and the second heating film 42 on the rear side of the movable push plate 41. When the blister box battery cell assembly 2 reaches the set test temperature, the battery cells in the blister box battery cell assembly 2 can be heated and charged and discharged by the charge and discharge probe mechanism 1. In addition, the blister box battery cell assembly 2 can also be charged and discharged while pressurizing and heating, realizing functions that cannot be achieved by existing testing devices.

[0032] The above description is only a preferred embodiment of the present invention, but the present invention should not be limited to the contents disclosed in the embodiment and the drawings, so any equivalent or modification completed without departing from the spirit disclosed in the present invention shall fall within the scope of protection of the present invention.

Claims

1. A high-precision pressurized heating charging and discharging fixture compatible with soft-pack and steel-shell battery cells, characterized in that include: Fixed bottom plate; A load-bearing mechanism installed on a fixed bottom plate, the load-bearing mechanism comprising a reference plate installed vertically on the fixed bottom plate, a pressure sensor installed on the front side of the reference plate, a heat insulation plate installed on the front side of the pressure sensor, a positioning load-bearing plate installed on the front side of the heat insulation plate, a first heating film installed on the front side of the positioning load-bearing plate, a first thermally conductive silicone pad installed on the front side of the first heating film, and a transverse test probe installed on the upper side of the positioning load-bearing plate, which sequentially penetrates the first heating film and the first thermally conductive silicone pad in the transverse direction and extends forward; A movable push plate mechanism, the movable push plate mechanism comprising two parallel guide rods fixed on the reference plate in a transverse direction at intervals, the movable push plate being fixed on the guide rods through a linear bearing, a second heating film being installed on the rear side of the movable push plate, and a second thermally conductive silicone pad being installed on the rear side of the second heating film; A blister box battery core assembly, wherein the blister box battery core assembly is fixed on the positioning bearing plate after passing through the first thermally conductive silicone pad and the first heating film through a step pin and abuts against the front end of the horizontal test probe, and the blister box battery core assembly is located between the movable push plate mechanism and the bearing mechanism; A push plate transmission mechanism, wherein the push plate transmission mechanism is mounted on the fixed bottom plate and connected to the movable push plate in the movable push plate mechanism through a floating joint; A driving mechanism connected to the push plate transmission mechanism; The charging and discharging probe mechanism is installed above the load-bearing mechanism and is arranged directly opposite to the blister box battery core assembly.

2. The high-precision pressurized heating charging and discharging fixture compatible with soft-pack and steel-shell battery cells as claimed in claim 1, characterized in that: The charging and discharging probe mechanism includes a support plate, which is fixed on the top of the reference plate. A linear slide is installed horizontally on the top of the support plate, and a horizontal slide is installed on the linear slide. A sliding cylinder is installed horizontally on the support plate and connected to the horizontal slide. A crimping cylinder is installed vertically downward at the front end of the horizontal slide. A probe mounting plate is installed on the telescopic axis of the crimping cylinder, and a plurality of longitudinal test probes are installed vertically downward.

3. The high-precision pressurized heating charging and discharging fixture compatible with soft-pack and steel-shell battery cells as claimed in claim 2, characterized in that: The left and right sides of the probe installation plate are respectively connected to the transverse slide plate through sliding shafts, and linear bearings are installed at the connection between the sliding shaft and the transverse slide plate.

4. The high-precision pressurized heating charging and discharging fixture compatible with soft-pack and steel-shell battery cells as claimed in claim 1, characterized in that: The blister box battery core assembly comprises a blister box and a battery core clamped in the blister box. The blister box is fixed on a positioning bearing plate after penetrating a first thermally conductive silicone pad and a first heating film through a step pin.

5. The high-precision pressurized heating charging and discharging fixture compatible with soft-pack and steel-shell battery cells as claimed in claim 4, characterized in that: The blister box includes a front shell and a rear shell, the front shell is provided with a hanging hole for docking with a step pin, the rear shell is embedded in the front shell, the battery cell is clamped between the front shell and the rear shell, the front shell is also provided with a battery cell center hole and multiple back holes, and the side of the front shell is also provided with an edge block corresponding to the horizontal test probe on the load-bearing mechanism.

6. The high-precision pressurized heating charging and discharging fixture compatible with soft-pack and steel-shell battery cells as claimed in claim 1, characterized in that: The push plate transmission mechanism includes a pad, which is mounted on a fixed base plate. A slide rail is provided on the pad, and a slide plate is mounted on the slide rail. A transmission screw is arranged parallel to the slide rail. The transmission screw and the slide plate are connected by a screw pair, and the slide plate is connected to the movable push plate by a floating joint.

7. The high-precision pressurized heating charging and discharging fixture compatible with soft-pack and steel-shell battery cells as claimed in claim 6, characterized in that: The driving mechanism comprises a servo motor, and an output shaft of the servo motor is connected to the end of a transmission screw rod.

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