Battery testing device and method for new energy automobile maintenance

Abstract

The invention relates to the field of battery testing, in particular to a battery testing device and method for new energy automobile maintenance, and the testing device comprises a testing table, the upper end of the testing table is fixedly provided with a storage rack, the storage rack is internally provided with a clamping assembly, the two sides of the upper end of the testing table are fixedly provided with lifting cylinders, and the top ends of the lifting cylinders are provided with longitudinal guide rails. A rotating motor is fixedly arranged at the bottom in the mounting pedestal; the output end of the rotating motor is fixedly connected with a rotating seat; a testing bracket is rotatably arranged in the rotating seat; sliding grooves are formed in two ends of the testing bracket; and a test assembly is arranged in the sliding seat. According to the invention, by adjusting the test spacing between the test assemblies, different numbers of battery cells of the to-be-tested battery can be tested independently according to actual test requirements, and the adaptability in the test process is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery testing, and in particular to a battery testing device and method for repairing new energy vehicles. Background Art

[0002] New energy vehicle power batteries are one of the core components of new energy vehicles. Their performance directly affects key indicators such as vehicle range, charging time, safety and service life. At present, common new energy vehicle power batteries mainly include lithium-ion batteries, nickel-metal hydride batteries and lithium iron phosphate batteries. Lithium-ion batteries have the advantages of high energy density, light weight and low self-discharge rate. They are the most widely used battery type in new energy vehicles. With the continuous advancement of science and technology, power batteries have made continuous breakthroughs in energy density, charging speed, safety and cost. In the production process of new energy vehicle power batteries, relevant testing equipment is needed to evaluate and test the performance of power batteries.

[0003] In the traditional testing process of power battery packs, testing is mainly done manually. Since the battery pack is composed of multiple cells, testers need to use handheld probes to test the cells one by one, which is time-consuming and labor-intensive, and has low testing efficiency. At the same time, there are certain safety hazards in the testing process. Summary of the invention

[0004] The purpose of the present invention is to provide a battery testing device and method for new energy vehicle maintenance, aiming to solve the above technical problems.

[0005] The purpose of the present invention can be achieved by the following technical solutions: A battery testing device for repairing new energy vehicles comprises a test bench, wherein a storage rack is fixedly arranged at the upper end of the test bench, a clamping assembly is arranged inside the storage rack, lifting cylinders are fixedly arranged on both sides of the upper end of the test bench, a longitudinal guide rail is arranged at the top of the lifting cylinder, a crossbeam is slidably installed on the longitudinal guide rail, a mounting seat is slidably installed on the crossbeam, a detection box is fixedly arranged at the top of the mounting seat, a rotating motor is fixedly arranged at the bottom of the mounting seat, a rotating seat is fixedly connected to the output end of the rotating motor, a corner motor is fixedly arranged on one side of the rotating seat, a test bracket is rotatably installed in the rotating seat, the output end of the corner motor is fixedly connected to the top of the test bracket, sliding grooves are arranged at both ends of the test bracket, a sliding seat is adapted to be slidably installed in the sliding groove, a pitch-adjusting motor is fixedly arranged at the bottom of the test bracket, the output end of the pitch-adjusting motor is connected to a matching gear, a group of toothed plates arranged symmetrically in a central direction are linearly and slidably installed inside the test bracket, the matching gear is meshed with the toothed plate, one end of the toothed plate passes through the test bracket and is fixedly connected to the corresponding sliding seat, and a test assembly is arranged in the sliding seat.

[0006] The test assembly includes a sleeve, which is fixedly arranged in a sliding seat, a test probe is coaxially slidably arranged inside the sleeve, a baffle is arranged on the outside of the test probe, a floating groove is arranged inside the sleeve, the baffle is movably installed in the floating groove, the top of the baffle is connected to the floating groove by a floating spring, an electrode head is arranged on the top of the test probe, a conductive contact seat is fixedly arranged on the top of the sleeve, and the conductive contact seat is connected to the detection box through a wire.

[0007] As a further solution of the present invention: a distance sensor is fixedly provided at one end of the sliding slot away from the center of the test bracket.

[0008] As a further solution of the present invention: a first slider is fixedly provided at the bottom of both ends of the beam, the first slider is slidably matched with the longitudinal guide rail, transverse guide rails are provided on both sides of the beam along the length direction, and a second slider is provided on the inner walls on both sides of the mounting base, the second slider is slidably matched with the transverse guide rail.

[0009] As a further solution of the present invention: movable grooves are arranged at the four corners of the rack, a lifting groove is arranged in the center of the rack, the movable groove is communicated with the lifting groove, limiting grooves are arranged around the surface of the rack, a accommodating groove is arranged in the center of the upper end of the rack, and an extension bracket is fixedly arranged on the side of the rack.

[0010] As a further solution of the present invention: the clamping assembly includes a sliding plate and a lifting column, the sliding plate is linearly slidably installed in the corresponding movable groove, the lifting column is slidably installed in the lifting groove up and down, an inclined slider is fixedly provided at one end of the sliding plate close to the lifting column, the end of the sliding plate away from the lifting column is connected to the movable groove through a first spring, a frustum portion is provided on the outer side of the lifting column, the inclined slider forms a sliding fit with the outer wall of the frustum portion, and the bottom end of the lifting column is connected to the lifting groove through a second spring.

[0011] As a further solution of the present invention: a connecting plate is fixedly provided on the upper end of the sliding plate, the connecting plate slidably cooperates with the limiting groove, a clamping head is fixedly provided on the top end of the connecting plate, a pressing plate is fixedly provided on the top end of the lifting column, and the pressing plate is adapted to the accommodating groove.

[0012] The present invention also provides a method for testing a battery for repairing a new energy vehicle, using the above-mentioned battery testing device for repairing a new energy vehicle, comprising the following steps: Step 1: Positioning and clamping: Place the battery to be tested in the rack and use the clamping assembly to clamp and fix the battery to be tested to ensure that it is fixed during the test.

[0013] Step 2: Posture adjustment: According to the layout of the battery cells in the battery to be tested, the test angle of the test bracket is adjusted by rotating the motor and the angle motor so that the test probe and the battery cell are accurately aligned.

[0014] Step 3: Adjust the spacing. According to the number of cells to be tested, use the spacing motor to drive the matching gear to rotate, and drive the test probes at both ends to move toward each other through the tooth plate, so as to adjust the spacing between the test probes at both ends to test single or multiple cells.

[0015] Step 4: Electrical performance test. The test probes at both ends are in contact and squeezed with the battery cell electrode contacts. The test probes push the electrode heads to contact the conductive contact seats, making the test circuit connected, thereby testing the battery cell's voltage, current, internal resistance and other parameters.

[0016] Beneficial effects of the present invention: (1) By setting up a mounting pedestal, during the maintenance test of new energy vehicle batteries, the horizontal position of the test assembly is adjusted by the longitudinal guide rail and the crossbeam, and the test height of the test assembly is adjusted by the lifting cylinder to ensure accurate positioning of the test. At the same time, according to the internal layout of the battery cell, the test angle of the test assembly is adjusted by the rotating motor and the angle motor, so that different points of the battery to be tested and different cell layouts can be tested. By adjusting the test posture of the test assembly, the flexibility of the test process is effectively improved. At the same time, the adjustable distance motor is used to drive the matching gear to rotate, and the test assemblies at both ends are driven to move toward each other through the tooth plate, so as to adjust the distance between the test assemblies at both ends, so that a single or multiple cells can be tested. By adjusting the test distance between the test assemblies, different numbers of cells of the battery to be tested can be tested independently according to actual test requirements, which effectively improves the adaptability of the test process.

[0017] (2) By setting up the test assembly, in the initial state, the baffle is squeezed to the bottom of the floating groove by the floating spring. At this time, the electrode head is disconnected from the conductive contact seat and the test circuit is not turned on. During the test, the test probe is squeezed and contacted with the electrode contact on the battery cell. At this time, the floating spring gradually begins to squeeze and deform. The buffering effect of the floating spring provides a floating space for the contact test process of the test probe, so that the test probe and the electrode contact are flexibly contacted to avoid damage to the battery cell. When the electrode head contacts the conductive contact seat, the test circuit is turned on, and the detected electrical signal data is transmitted to the detection box through the wire, thereby realizing the test process of multiple parameters such as the voltage, current and internal resistance of the battery cell. When the test is completed, the test probe will retreat under the action of the floating spring and automatically disconnect the test circuit, so that even if the test probe is accidentally touched during the movement, there will be no electric shock or mismeasurement, thereby ensuring the safety and reliability of the test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the internal structure of the storage rack of the present invention.

[0021] Figure 3 It is a schematic diagram of the external structure of the storage rack of the present invention.

[0022] Figure 4 It is a structural schematic diagram of the clamping assembly in the present invention.

[0023] Figure 5 It is a structural schematic diagram of the crossbeam in the present invention.

[0024] Figure 6 It is a structural schematic diagram of the installation base in the present invention.

[0025] Figure 7 It is a schematic diagram of the internal structure of the mounting base in the present invention.

[0026] Figure 8 It is a schematic diagram of the structure of the test component in the present invention.

[0027] In the figure: 1. test bench; 2. rack; 201. movable slot; 202. lifting slot; 203. limit slot; 204. containing slot; 205. extension bracket; 3. clamping assembly; 301. sliding plate; 3011. inclined slider; 3012. first spring; 3013. connecting plate; 302. lifting column; 3021. round table; 3022. second spring; 303. clamping head; 304. pressing plate; 4. lifting cylinder; 5. longitudinal guide rail; 6. crossbeam; 601. first slider; 602. transverse guide rail; 7. Mounting base; 701. Inspection box; 702. Second slider; 703. Rotating motor; 704. Rotating seat; 705. Angle motor; 8. Test bracket; 801. Sliding slot; 802. Distance sensor; 803. Pitch-adjusting motor; 804. Matching gear; 805. Tooth plate; 806. Sliding seat; 9. Test assembly; 901. Sleeve; 902. Test probe; 903. Floating slot; 904. Baffle; 905. Floating spring; 906. Electrode head; 907. Conductive contact seat; 908. Wire. DETAILED DESCRIPTION

[0028] 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1 , Figure 6 and Figure 7 As shown, the present invention is a battery testing device for new energy vehicle maintenance, comprising a test bench 1, a shelf 2 is fixedly arranged on the upper end of the test bench 1, a clamping assembly 3 is arranged inside the shelf 2, lifting cylinders 4 are fixedly arranged on both sides of the upper end of the test bench 1, a longitudinal guide rail 5 is arranged on the top of the lifting cylinder 4, a crossbeam 6 is slidably installed on the longitudinal guide rail 5, a mounting base 7 is slidably installed on the crossbeam 6, a detection box 701 is fixedly arranged on the top of the mounting base 7, a rotating motor 703 is fixedly arranged on the bottom of the mounting base 7, an output end of the rotating motor 703 is fixedly connected to a rotating base 704, and a corner motor 705 is fixedly arranged on one side of the rotating base 704. A test bracket 8 is rotatably installed in the rotating seat 704, and the output end of the corner motor 705 is fixedly connected to the top of the test bracket 8. Sliding grooves 801 are set at both ends of the test bracket 8, and a sliding seat 806 is slidably installed in the sliding groove 801. A pitch-adjusting motor 803 is fixedly installed at the bottom of the test bracket 8, and the output end of the pitch-adjusting motor 803 is connected to a matching gear 804. A group of tooth plates 805 arranged in a centrally symmetrical manner are linearly installed inside the test bracket 8, and the matching gear 804 is meshed with the tooth plate 805. One end of the tooth plate 805 passes through the test bracket 8 and is fixedly connected to the corresponding sliding seat 806, and a test component 9 is arranged in the sliding seat 806.

[0030] Specifically, by setting up the mounting base 7, during the maintenance test of the new energy vehicle battery, the horizontal position of the test assembly 9 is adjusted by the longitudinal guide rail 5 and the crossbeam 6, and the test height of the test assembly 9 is adjusted by the lifting cylinder 4 to ensure accurate positioning of the test. At the same time, according to the internal layout of the battery cell, the test angle of the test assembly 9 is adjusted by the rotating motor 703 and the corner motor 705, so that different points of the battery to be tested and different cell layouts can be tested. By adjusting the test posture of the test assembly 9, the flexibility of the test process is effectively improved. At the same time, the spacing motor 803 is used to drive the matching gear 804 to rotate, and the tooth plate 805 is used to drive the test assemblies 9 at both ends to move toward each other, so as to adjust the spacing between the test assemblies 9 at both ends, so that a single or multiple cells can be tested. By adjusting the test spacing between the test assemblies 9, different numbers of cells of the battery to be tested can be independently tested according to actual test requirements, which effectively improves the adaptability of the test process.

[0031] Among them, most of the cells of the power batteries of new energy vehicles currently adopt a vertical layout. At this time, the test component 9 will be set facing downward. However, there are also a small number of power battery cells that adopt a horizontal layout. At this time, the corner motor 705 will drive the test component 9 to rotate 90°, so that the test component 9 faces the side of the battery to be tested, thereby ensuring that the test component 9 and the battery cell are accurately aligned.

[0032] like Figure 8 As shown, the test component 9 includes a sleeve 901, which is fixedly arranged in the sliding seat 806. A test probe 902 is coaxially slidably arranged inside the sleeve 901. A baffle 904 is arranged on the outside of the test probe 902. A floating groove 903 is arranged inside the sleeve 901. The baffle 904 is movably installed in the floating groove 903. The top of the baffle 904 is connected to the floating groove 903 through a floating spring 905. An electrode head 906 is arranged on the top of the test probe 902. A conductive contact seat 907 is fixedly arranged on the top of the sleeve 901. The conductive contact seat 907 is connected to the detection box 701 through a wire 908.

[0033] Specifically, by setting the test component 9, in the initial state, the baffle 904 is squeezed by the floating spring 905 at the bottom of the floating groove 903, at this time, the electrode head 906 is disconnected from the conductive contact seat 907, and the test circuit is not turned on. During the test, the test probe 902 is squeezed and contacted with the electrode contact on the battery cell, and the floating spring 905 gradually begins to be squeezed and deformed. The buffering effect of the floating spring 905 is used to provide a floating space for the contact test process of the test probe 902, so that the test probe 902 is flexibly in contact with the electrode contact to avoid damage to the battery cell. When the electrode head 906 is in contact with the conductive contact seat 907, the test circuit is turned on, and the detected electrical signal data is transmitted to the detection box 701 through the wire 908, thereby realizing the test process of multiple parameters such as the voltage, current and internal resistance of the battery cell. When the test is completed, the test probe 902 will retreat under the action of the floating spring 905 and automatically disconnect the test circuit, so that even if the test probe 902 is accidentally touched during the movement, there will be no electric shock or mismeasurement, thereby ensuring the safety and reliability of the test process.

[0034] like Figure 6 As shown, a distance sensor 802 is fixedly provided at one end of the sliding slot 801 away from the center of the test bracket 8 .

[0035] Specifically, during the spacing adjustment process, the distance sensor 802 is used to monitor the moving distance of the test component 9 in real time, so that the spacing between the test components 9 at both ends can be accurately adjusted so that it can adapt to and match the electrode contacts at both ends of a single battery cell or multiple battery cells.

[0036] like Figure 5 and Figure 6 As shown, first sliders 601 are fixedly provided at the bottom of both ends of the beam 6, and the first sliders 601 are slidably matched with the longitudinal guide rails 5. Transverse guide rails 602 are provided on both sides of the beam 6 along the length direction, and second sliders 702 are provided on the inner walls of both sides of the mounting base 7, and the second sliders 702 are slidably matched with the transverse guide rails 602.

[0037] Specifically, by providing the transverse guide rail 602 and the longitudinal guide rail 5, the test assembly 9 can test different positions on the battery to be tested, and the transmission of the electric guide rail is reliable and stable, thereby ensuring the precise positioning of the test assembly 9 and effectively improving the test efficiency.

[0038] like Figure 2 and Figure 3 As shown, movable grooves 201 are arranged at the four corners inside the rack 2, a lifting groove 202 is arranged at the center inside the rack 2, the movable groove 201 is connected with the lifting groove 202, limiting grooves 203 are arranged through the surface of the rack 2, a receiving groove 204 is arranged at the center of the upper end of the rack 2, and an extension bracket 205 is fixedly arranged on the side of the rack 2.

[0039] like Figure 4 As shown, the clamping assembly 3 includes a sliding plate 301 and a lifting column 302. The sliding plate 301 is linearly slidably installed in the corresponding movable groove 201, and the lifting column 302 is slidably installed up and down in the lifting groove 202. An inclined slider 3011 is fixedly provided at one end of the sliding plate 301 close to the lifting column 302, and the end of the sliding plate 301 away from the lifting column 302 is connected to the movable groove 201 through a first spring 3012. A frustum portion 3021 is provided on the outer side of the lifting column 302, and the inclined slider 3011 forms a sliding fit with the outer wall of the frustum portion 3021, and the bottom end of the lifting column 302 is connected to the lifting groove 202 through a second spring 3022.

[0040] Furthermore, a connecting plate 3013 is fixedly provided on the upper end of the sliding plate 301, and the connecting plate 3013 slidably cooperates with the limiting groove 203. A clamping head 303 is fixedly provided on the top of the connecting plate 3013, and a pressing plate 304 is fixedly provided on the top of the lifting column 302, and the pressing plate 304 is adapted to the accommodating groove 204.

[0041] Specifically, by setting the clamping assembly 3, when placing the battery to be tested, the bottom of the battery to be tested is pressed against the pressure plate 304, and the pressure plate 304 is pressed downward by the gravity of the battery to be tested. At this time, the lifting column 302 slides downward, and the second spring 3022 is squeezed and deformed. During the downward movement of the lifting column 302, the inclined slider 3011 will always slide along the outer wall of the truncated cone 3021, so that the sliding plate 301 can achieve a linear inward sliding process under the thrust of the first spring 3012, thereby driving the clamping head 303 to move inward through the connecting plate 3013 until it contacts the side of the battery to be tested, thereby realizing an adaptive clamping process for the battery. When removing the battery, the lifting column 302 is lifted upward and reset, and the sliding plate 301 will also retreat and release the clamping effect on the battery.

[0042] The working principle of the testing device in the present invention is as follows: Figure 1-Figure 8As shown, during the maintenance test of the new energy vehicle battery, the battery to be tested is first placed in the storage rack 2, and the bottom of the battery to be tested is pressed against the pressure plate 304. The pressure plate 304 is pressed downward by the gravity of the battery to be tested. At this time, the lifting column 302 slides downward, and the second spring 3022 is squeezed and deformed. During the downward movement of the lifting column 302, the inclined slider 3011 will always slide along the outer wall of the truncated cone portion 3021, so that the sliding plate 301 realizes a linear inward sliding process under the thrust of the first spring 3012, thereby driving the clamping head 303 to move inward through the connecting plate 3013 until it contacts the side of the battery to be tested, thereby realizing an adaptive clamping process for the battery. The horizontal position of the test assembly 9 is adjusted by the longitudinal guide rail 5 and the crossbeam 6, and the test height of the test assembly 9 is adjusted by the lifting cylinder 4 to ensure precise positioning of the test. At the same time, according to the internal layout of the battery cell, the test angle of the test assembly 9 is adjusted by the rotating motor 703 and the corner motor 705, so that different points of the battery to be tested and different cell layouts can be tested. By adjusting the test posture of the test assembly 9, the flexibility of the test process is effectively improved. At the same time, the spacing motor 803 is used to drive the matching gear 804 to rotate, and the tooth plate 805 is used to drive the test assemblies 9 at both ends to move toward each other, so as to adjust the distance between the test assemblies 9 at both ends, so that a single or multiple cells can be tested. By adjusting the test spacing between the test assemblies 9, different numbers of cells of the battery to be tested can be independently tested according to actual test requirements, which effectively improves the adaptability of the test process. During the test, in the initial state, the baffle 904 is squeezed by the floating spring 905 at the bottom of the floating groove 903. At this time, the electrode head 906 is disconnected from the conductive contact seat 907, and the test circuit is not turned on. During the test, the test probe 902 is squeezed and contacted with the electrode contact on the battery cell. At this time, the floating spring 905 gradually begins to be squeezed and deformed. The buffering effect of the floating spring 905 is used to provide a floating space for the contact test process of the test probe 902, so that the test probe 902 is flexibly in contact with the electrode contact to avoid damage to the battery cell. When the electrode head 906 is in contact with the conductive contact seat 907, the test circuit is turned on, and the detected electrical signal data is transmitted to the detection box 701 through the wire 908, thereby realizing the test process of multiple parameters such as the voltage, current and internal resistance of the battery cell. When the test is completed, the test probe 902 will retreat under the action of the floating spring 905 and automatically disconnect the test circuit, so that even if the test probe 902 is accidentally touched during the movement, there will be no electric shock or mismeasurement, thereby ensuring the safety and reliability of the test process.

[0043] The present invention also provides a method for testing a battery for repairing a new energy vehicle, using the above-mentioned battery testing device for repairing a new energy vehicle, comprising the following steps: Step 1: Positioning and clamping: placing the battery to be tested in the rack 2, and clamping and fixing the battery to be tested by using the clamping assembly 3 to ensure that it is fixed during the test.

[0044] Step 2: Posture adjustment: according to the layout of the cells in the battery to be tested, the test angle of the test bracket 8 is adjusted by rotating the motor 703 and the angle motor 705 so that the test probe 902 is precisely aligned with the cell.

[0045] Step 3: Adjust the spacing. According to the number of cells to be tested, the spacing motor 803 is used to drive the matching gear 804 to rotate, and the toothed plate 805 is used to drive the test probes 902 at both ends to move toward each other, thereby adjusting the spacing between the test probes 902 at both ends to test a single or multiple cells.

[0046] Step 4: Electrical performance test. The test probes 902 at both ends are in contact with and squeezed against the cell electrode contacts. The test probes 902 push the electrode head 906 to contact the conductive contact seat 907, so that the test circuit is connected, thereby testing the cell's voltage, current, internal resistance and other parameters.

[0047] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A battery testing device for new energy vehicle maintenance, comprising a test bench (1), wherein a storage rack (2) is fixedly arranged on the upper end of the test bench (1), characterized in that: A clamping assembly (3) is arranged inside the storage rack (2); lifting cylinders (4) are fixedly arranged on both sides of the upper end of the test bench (1); a longitudinal guide rail (5) is arranged at the top of the lifting cylinder (4); a crossbeam (6) is slidably mounted on the longitudinal guide rail (5); a mounting base (7) is slidably mounted on the crossbeam (6); a detection box (701) is fixedly arranged at the top of the mounting base (7); a rotating motor (703) is fixedly arranged at the bottom of the mounting base (7); a rotating base (704) is fixedly connected to the output end of the rotating motor (703); a corner motor (705) is fixedly arranged on one side of the rotating base (704); a test bracket (8) is rotatably mounted in the rotating base (704); and the corner motor (705) is fixedly arranged on one side of the rotating base (704). The output end of the motor (705) is fixedly connected to the top of the test bracket (8), and the two ends of the test bracket (8) are provided with sliding grooves (801), and a sliding seat (806) is slidably installed in the sliding groove (801). A pitch-adjusting motor (803) is fixedly installed at the bottom of the test bracket (8), and the output end of the pitch-adjusting motor (803) is connected to a matching gear (804). A group of tooth plates (805) arranged in a central symmetrical manner are linearly slidably installed inside the test bracket (8), and the matching gear (804) is meshed with the tooth plate (805). One end of the tooth plate (805) passes through the test bracket (8) and is fixedly connected to the corresponding sliding seat (806), and a test assembly (9) is arranged in the sliding seat (806); The test assembly (9) comprises a sleeve (901), wherein the sleeve (901) is fixedly arranged in a sliding seat (806), a test probe (902) is coaxially slidably arranged inside the sleeve (901), a baffle (904) is arranged outside the test probe (902), a floating groove (903) is arranged inside the sleeve (901), the baffle (904) is movably installed in the floating groove (903), the top of the baffle (904) and the floating groove (903) are connected via a floating spring (905), an electrode head (906) is arranged at the top of the test probe (902), a conductive contact seat (907) is fixedly arranged at the top of the sleeve (901), and the conductive contact seat (907) is connected to the detection box (701) via a wire (908).

2. A battery testing device for new energy vehicle maintenance according to claim 1, characterized in that: A distance sensor (802) is fixedly disposed at one end of the sliding slot (801) away from the center of the test bracket (8).

3. A battery testing device for new energy vehicle maintenance according to claim 1, characterized in that: First sliding blocks (601) are fixedly arranged at the bottom of both ends of the crossbeam (6), and the first sliding blocks (601) are slidably matched with the longitudinal guide rails (5). Transverse guide rails (602) are arranged on both sides of the crossbeam (6) along the length direction. Second sliding blocks (702) are arranged on the inner walls of both sides of the mounting base (7), and the second sliding blocks (702) are slidably matched with the transverse guide rails (602).

4. A battery testing device for new energy vehicle maintenance according to claim 1, characterized in that: The rack (2) has movable grooves (201) arranged at the four corners thereof, a lifting groove (202) is arranged at the center thereof, the movable groove (201) is connected to the lifting groove (202), limiting grooves (203) are arranged on the four sides of the surface of the rack (2), a receiving groove (204) is arranged at the center of the upper end of the rack (2), and an extension bracket (205) is fixedly arranged on the side of the rack (2).

5. A battery testing device for new energy vehicle maintenance according to claim 4, characterized in that: The clamping assembly (3) comprises a sliding plate (301) and a lifting column (302); the sliding plate (301) is linearly slidably installed in a corresponding movable groove (201); the lifting column (302) is slidably installed in the lifting groove (202) up and down; an inclined sliding block (3011) is fixedly arranged at one end of the sliding plate (301) close to the lifting column (302); an end of the sliding plate (301) away from the lifting column (302) is connected to the movable groove (201) via a first spring (3012); a truncated cone portion (3021) is arranged on the outer side of the lifting column (302); the inclined sliding block (3011) and the outer wall of the truncated cone portion (3021) form a sliding fit; and the bottom end of the lifting column (302) is connected to the lifting groove (202) via a second spring (3022).

6. A battery testing device for new energy vehicle maintenance according to claim 5, characterized in that: A connecting plate (3013) is fixedly provided on the upper end of the sliding plate (301), the connecting plate (3013) slidably cooperates with the limiting groove (203), a clamping head (303) is fixedly provided on the top end of the connecting plate (3013), and a pressing plate (304) is fixedly provided on the top end of the lifting column (302), the pressing plate (304) is adapted to the accommodating groove (204).

7. A method for testing a battery for repairing a new energy vehicle, using a battery testing device for repairing a new energy vehicle as claimed in claim 1, characterized in that: The following steps are involved: Step 1: Positioning and clamping, placing the battery to be tested in the rack (2), and clamping and fixing the battery to be tested using the clamping assembly (3) to ensure that it is fixed during the test; Step 2: posture adjustment, according to the layout of the battery cells in the battery to be tested, the test deflection angle of the test bracket (8) is adjusted by the rotating motor (703) and the angle motor (705), so that the test probe (902) and the battery cells are accurately aligned; Step 3: adjusting the spacing, according to the number of cells to be tested, using the spacing adjustment motor (803) to drive the matching gear (804) to rotate, and driving the test probes (902) at both ends to move toward each other through the toothed plate (805), thereby adjusting the spacing between the test probes (902) at both ends, so as to test a single cell or multiple cells; Step 4: Electrical performance test, the test probes (902) at both ends are in contact with and squeezed against the cell electrode contacts, the test probes (902) push the electrode head (906) to contact the conductive contact seat (907), so that the test circuit is connected, thereby testing the cell's voltage, current, internal resistance and other parameters.

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