Battery cell testing device

Abstract

The invention relates to the technical field of battery cell testing, and provides a battery cell testing device, a base is provided with a mounting position, the mounting position is used for placing a battery cell, and a tab of the battery cell faces a third direction; the pressure testing assembly comprises two clamping pieces and a pressure sensor, the two clamping pieces are installed on the two opposite sides in the first direction in a mirroring mode, the two clamping pieces can be close to or away from each other in the first direction and are used for clamping or releasing the battery cell, and the pressure sensor is used for obtaining the pressure value between the clamping pieces and the battery cell; the current testing assembly comprises a wiring board, a probe module and a battery simulator unit, the wiring board carries the probe module, and the wiring board can get close to or get away from the base in the third direction, so that the probe module is in corresponding contact with the tab to communicate the battery simulator unit with the battery cell; the first direction is perpendicular to the third direction. Therefore, the battery cell testing device can perform pressure testing and current testing on the battery cell at the same time, and the working efficiency of battery cell testing is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery cell testing, and in particular to a battery cell testing device. Background Art

[0002] The battery cell is the core component of the battery, and it needs to be tested before leaving the factory. The general factory test includes current test and pressure test.

[0003] When performing a pressure test, the test device currently used directly clamps the battery cell between two force-bearing plates, and the force-applying device applies an initial force, which is transmitted to one of the force-bearing plates through an elastic member to compress the soft-pack battery cell. When the soft-pack battery cell expands or contracts, the pressure applied to the two force-bearing plates will change and be transmitted to the pressure measuring element for measurement.

[0004] When conducting current tests, the test devices currently used include probes, sensors and battery simulators. The battery simulators can be connected to the tabs of the battery cells through the probes. The battery simulators can simulate the battery's voltage, current, internal resistance, capacity and other characteristics, as well as the battery's charge and discharge process and various working states. The sensors are used to obtain information such as the temperature of the battery cells when they are powered on.

[0005] In the prior art, current testing and pressure testing are both independent sets of equipment, each of which performs tests independently, which is inefficient, costly, and occupies a large space.

[0006] Therefore, there is an urgent need for a battery cell testing device to solve the above technical problems. Summary of the invention

[0007] The purpose of the present invention is to provide a battery cell testing device, which can perform pressure testing and current testing on battery cells at the same time, thereby improving the operating efficiency of battery cell testing.

[0008] To achieve this object, the present invention adopts the following technical solutions:

[0009] Battery cell testing device, including:

[0010] A base, wherein the base is provided with a mounting position, the mounting position is used to place a battery cell, and the tab of the battery cell faces a third direction;

[0011] A pressure test assembly, the pressure test assembly comprising a clamp and a pressure sensor, the clamp is provided with two, mirror-imaged on opposite sides of the installation in the first direction, the two clamps can approach or move away from each other along the first direction, and are used to clamp or release the battery cell, and the pressure sensor is used to obtain the pressure value between the clamp and the battery cell;

[0012] A current test assembly, the current test assembly comprising a wiring board, a probe module and a battery simulator unit, the wiring board being equipped with the probe module, the wiring board being able to approach or move away from the base along the third direction, so that the probe module contacts the tabs correspondingly to connect the battery simulator unit and the battery cell;

[0013] The first direction is perpendicular to the third direction.

[0014] As a preferred technical solution of the above-mentioned battery cell testing device, the above-mentioned pressure testing assembly also includes a first driving member and a first transfer case, the above-mentioned first transfer case includes a first input shaft and two first output shafts that are transmission-connected thereto, the above-mentioned first driving member can drive the above-mentioned first input shaft, the two above-mentioned first output shafts are connected to the two above-mentioned clamping members one-to-one, and can drive the two above-mentioned clamping members to approach or move away from each other along the above-mentioned first direction.

[0015] As a preferred technical solution of the battery cell testing device, the pressure testing assembly further comprises a pad, which is provided in two pieces and respectively placed on opposite sides of the battery cell in the first direction and clamped between the battery cell and the clamping member.

[0016] As a preferred technical solution of the above-mentioned battery cell testing device, the above-mentioned wiring board is provided with a first slide groove, the above-mentioned battery cell includes two pole ears arranged in sequence along the second direction, two first sliders are inserted into the above-mentioned first slide groove, which are used to correspond to the two pole ears one by one, and the two first sliders can approach or move away from each other along the above-mentioned second direction, and the above-mentioned first sliders are both installed with the above-mentioned probe module;

[0017] The first direction, the second direction and the third direction are perpendicular to each other.

[0018] As a preferred technical solution of the above-mentioned battery cell testing device, the above-mentioned current testing component also includes a conductive patch, the above-mentioned conductive patch includes a positive electrode patch and a negative electrode patch, the above-mentioned positive electrode patch and the above-mentioned negative electrode patch are respectively arranged on the opposite side walls of the above-mentioned first slide groove in the above-mentioned first direction, and current flows through the above-mentioned conductive patches; in the same above-mentioned first slide groove, one of the above-mentioned first sliders can be electrically connected to the above-mentioned positive electrode patch, and the other above-mentioned first slider can be electrically connected to the above-mentioned negative electrode patch, and the above-mentioned probe module is electrically connected to the above-mentioned conductive patch through the above-mentioned first slider.

[0019] As a preferred technical solution of the above-mentioned battery cell testing device, the current testing assembly also includes a lifting structure, the above-mentioned lifting structure includes a second driving member and a threaded rod, the above-mentioned second driving member is installed on the above-mentioned base, the axis of the above-mentioned threaded rod is parallel to the above-mentioned third direction, one axial end of the above-mentioned threaded rod is rotatably connected to the above-mentioned base, and the other axial end is threadedly connected to the above-mentioned wiring board, and the output end of the above-mentioned second driving member can drive the above-mentioned threaded rod to rotate around the axis of the above-mentioned threaded rod, so that the above-mentioned wiring board can approach or move away from the above-mentioned base along the above-mentioned third direction.

[0020] As a preferred technical solution of the above-mentioned battery cell testing device, the above-mentioned lifting structure also includes a second transfer case, the above-mentioned second transfer case includes a second input shaft and multiple second output shafts, the multiple second output shafts are transmission connected to the multiple threaded rods in a one-to-one correspondence, and the above-mentioned second driving member is transmission connected to the above-mentioned second input shaft, and can drive the multiple threaded rods to rotate at the same time.

[0021] As a preferred technical solution for the above-mentioned battery cell testing device, the above-mentioned base is provided with a plurality of the above-mentioned mounting positions, and the plurality of the above-mentioned mounting positions are arranged sequentially along the above-mentioned first direction, the above-mentioned pressure testing assembly is provided with a plurality of sets and corresponds one-to-one to the plurality of the above-mentioned mounting positions, and the above-mentioned probe modules are provided with a plurality of sets, and each of the above-mentioned mounting positions is configured with two of the above-mentioned probe modules.

[0022] As a preferred technical solution of the above-mentioned battery cell testing device, the above-mentioned wiring board is also provided with a wiring groove, and the above-mentioned wiring groove includes a positive electrode groove and a negative electrode groove, the above-mentioned positive electrode groove is used to set the positive electrode wiring harness, and one end of the above-mentioned positive electrode wiring harness is electrically connected to one of the above-mentioned probe modules, and the above-mentioned negative electrode groove is used to set the negative electrode wiring harness, and one end of the above-mentioned negative electrode wiring harness is electrically connected to another of the above-mentioned probe modules;

[0023] The wiring board is also fixed with conductive columns, including positive columns and negative columns. The positive columns are at least partially installed in the positive slots for connecting with the other ends of the plurality of positive wiring harnesses, and the negative columns are at least partially installed in the negative slots for connecting with the other ends of the plurality of negative wiring harnesses.

[0024] As a preferred technical solution of the battery cell testing device, in the third direction, the wiring groove is provided on a side of the wiring board facing the base.

[0025] Beneficial effects of the present invention:

[0026] The present invention provides a battery cell testing device, including a base, a pressure test assembly and a current test assembly. The base is provided with a mounting position, the mounting position is used to place the battery cell, and the pole ear of the battery cell faces a third direction; the pressure test assembly includes a clamp and a pressure sensor, two clamps are provided, mirror-imaged and arranged on opposite sides of the first direction, the two clamps can approach or move away from each other along the first direction, and are used to clamp or release the battery cell, and the pressure sensor is used to obtain the pressure value between the clamp and the battery cell; the current test assembly includes a wiring board, a probe module and a battery simulator unit, the wiring board is equipped with a probe module, the wiring board can approach or move away from the base along the third direction, so that the probe module contacts the pole ear correspondingly to connect the battery simulator unit and the battery cell; the first direction is perpendicular to the third direction.

[0027] Specifically, during the pressure test, the pressure sensor is placed between the battery cell and the clamp, and the pressure sensor is connected to the pressure acquisition system, which can obtain test data and pressure distribution. After the battery cell is fixed by the clamp, the probe module is brought into contact with the tab of the battery cell by moving the wiring board, and the sensor line and voltage line are arranged in the wiring board, which is connected to the battery simulator unit. The battery simulator unit can simulate the voltage, current, internal resistance, capacity and other characteristics of the battery, and simulate the battery charging and discharging process and various working states. In this way, the battery cell testing device can perform pressure testing and current testing on the battery cell at the same time, which improves the operating efficiency of the battery cell testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0029] Figure 1 is a structural schematic diagram of a battery cell testing device provided by an embodiment of the present invention;

[0030] Figure 2 is a schematic diagram of the structure of a pressure test assembly (part of the side wall of the base is hidden) provided in an embodiment of the present invention;

[0031] Figure 3 is a front view of a pressure test assembly (part of the side wall of the base is hidden) provided by an embodiment of the present invention;

[0032] Figure 4 is a side view of a pressure test assembly (part of the side wall of the base is hidden) provided by an embodiment of the present invention;

[0033] Figure 5is a bottom view of a pressure test assembly (part of the side wall of the base is hidden) provided by an embodiment of the present invention;

[0034] Figure 6 is a top view of a pressure test assembly (with a portion of the clamping member hidden) provided by an embodiment of the present invention;

[0035] Figure 7 is a top view of a battery cell testing device provided by an embodiment of the present invention;

[0036] Figure 8 It is a structural schematic diagram of a current testing device (hidden lifting structure) provided in an embodiment of the present invention;

[0037] Fig. 9 is a schematic diagram of the structure of a wiring board provided in an embodiment of the present invention;

[0038] Fig.10 yes Fig. 9 Sectional view at AA in the middle;

[0039] Fig.11 yes Fig.10 A partial enlarged view of point B in the middle;

[0040] Fig.12 is a side view of a lifting structure provided by an embodiment of the present invention;

[0041] Fig.13 is a bottom view of the lifting structure provided by an embodiment of the present invention;

[0042] Fig.14 is a bottom view of a wiring board provided by an embodiment of the present invention;

[0043] Fig.15 is a top view of the wiring board provided in an embodiment of the present invention.

[0044] In the figure:

[0045] X, first direction; Y, second direction; Z, third direction;

[0046] 100, base; 110, accommodating cavity; 120, third slide groove; 130, first bearing seat; 140, fourth slide groove; 150, guardrail; 151, intercepting part; 152, connecting part;

[0047] 200, pressure test assembly; 210, clamping member; 211, hollow structure; 220, first transfer case; 221, first input shaft; 222, first output shaft; 230, pad; 240, first hand wheel;

[0048] 300, current test assembly; 310, wiring board; 311, first slide; 312, second slide; 3121, limiting protrusion; 3122, first gap; 3123, second gap; 313, wiring groove; 313a, positive electrode groove; 313b, negative electrode groove; 3131, branch section; 3132, trunk section; 314, conductive column; 314a, positive electrode column; 314b, negative electrode column; 320, first slider; 321, block body; 32 2. Terminal; 330. Probe module; 341. Positive patch; 342. Negative patch; 360. Lifting structure; 361. Second hand wheel; 362. Threaded rod; 363. Second slider; 364. Second transfer case; 3641. Second input shaft; 3642. Second output shaft; 3643. Second housing; 3644. Reversing transmission mechanism; 365. Stabilizing member; 366. Guide column; 367. Linear bearing; 368. Second bearing seat;

[0049] 400, battery cell; 410, tab. DETAILED DESCRIPTION

[0050] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0051] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0053] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0054] like Figures 1 to 15 As shown, the present invention provides a battery cell testing device, including a base 100 , a pressure testing assembly 200 and a current testing assembly 300 . Among them, the base 100 is provided with an installation position, which is used to place the battery cell 400, and the pole ear 410 of the battery cell 400 faces the third direction Z; the pressure test assembly 200 includes a clamping member 210 and a pressure sensor, and two clamping members 210 are provided, which are mirror-imaged and installed on opposite sides of the first direction X. The two clamping members 210 can approach or move away from each other along the first direction X, and are used to clamp or release the battery cell 400. The pressure sensor is used to obtain the pressure value between the clamping member 210 and the battery cell 400; the current test assembly 300 includes a wiring board 310, a probe module 330 and a battery simulator unit. The wiring board 310 is equipped with the probe module 330. The wiring board 310 can approach or move away from the base 100 along the third direction Z, so that the probe module 330 and the pole ear 410 are in corresponding contact to connect the battery simulator unit and the battery cell 400; the first direction X is perpendicular to the third direction Z.

[0055] Specifically, during the pressure test, the pressure sensor is placed between the battery cell 400 and the clamp 210, and the pressure sensor is connected to the pressure acquisition system in communication, so that the pressure acquisition system can obtain the test data and pressure distribution. After the clamp 210 fixes the battery cell 400, the wiring board 310 is moved to make the probe module 330 contact the lug 410 of the battery cell 400, and the sensor line and voltage line are arranged in the wiring board 310, which is connected to the battery simulator unit. The battery simulator unit can simulate the voltage, current, internal resistance, capacity and other characteristics of the battery, and simulate the charging and discharging process and various working states of the battery. In this way, the battery cell testing device can perform pressure testing and current testing on the battery cell 400 at the same time, thereby improving the operating efficiency of the battery cell 400 test.

[0056] Exemplarily, the pressure sensor is a pressure film sensor.

[0057] Furthermore, the pressure acquisition system indicates the expansion force of the battery cell 400 by means of the color scale displayed on the screen, and the images acquired on the screen have a playback function.

[0058] Furthermore, the running program and test conditions are written through the host computer software. The software of the host computer monitors and records the data. The variables and editing conditions are set before the test. If the boundary conditions are triggered during the test, the test can be stopped urgently and the data recording can be ended, and exported in the form of an Excel file.

[0059] Furthermore, the current test assembly 300 also includes a temperature box, and the battery cell test assembly and the battery cell 400 can be placed in the temperature box to provide an adaptive temperature.

[0060] Optionally, the pressure testing assembly 200 also includes a first driving member and a first transfer case 220, the first transfer case 220 includes a first input shaft 221 and two first output shafts 222 that are transmission-connected thereto, the first driving member can drive the first input shaft 221, the two first output shafts 222 are connected to the two clamping members 210 in a one-to-one correspondence, and can drive the two clamping members 210 to move closer to or away from each other along the first direction X.

[0061] Exemplarily, the first transfer case 220 includes a first input shaft 221 and two first output shafts 222, one axial end of the first input shaft 221 is transmitted to the output shaft of the first driving member, and a driving gear is coaxially fixed to the other axial end of the first input shaft 221. The axes of the two first output shafts 222 are parallel to the first direction X and perpendicular to the axis of the first input shaft 221. The two first output shafts 222 are symmetrically arranged on both radial sides of the first input shaft 221, and a driven gear is coaxially fixed to one axial end of the first output shaft 222. The driven gear is meshed with the driving gear and both are bevel gears, and the other axial end of the first output shaft 222 is threadedly connected to the clamping member 210. Thus, when the first input shaft 221 rotates, the power is reversed through the meshing transmission of the driving gear and the driven gear, so that the two first output shafts 222 rotate together. Since the first output shaft 222 is threadedly connected to the clamping member 210, the clamping member 210 partially abuts against the base 100 and cannot rotate with the first output shaft 222, that is, it moves along the axial direction of the first output shaft 222 to achieve the clamping members 210 to move closer or farther away from each other. When the clamping members 210 are closer to each other, the battery cell 400 is clamped, and when they are farther away from each other, the clamping member 210 releases the battery cell 400.

[0062] Exemplarily, racks are installed at one axial end of the two first output shafts 222, and the other ends are respectively fixed to a corresponding clamping member 210. The two first output shafts 222 are symmetrically arranged on both radial sides of the first input shaft 221. A gear is coaxially installed on the first input shaft 221, and the gear is meshed with the racks on both sides. In this way, when the first input shaft 221 rotates, the gear rack transmission structure can convert the rotation of the first input shaft 221 into a linear movement along the first direction X, so that the two first output shafts 222 can drive the corresponding clamping members 210 to move closer to or away from each other.

[0063] Optionally, a accommodating cavity 110 is provided in the base 100, and a third slide groove 120 is provided on the top end surface of the accommodating cavity 110. The length direction of the third slide groove 120 is parallel to the first direction X. The first transfer case 220 is installed in the accommodating cavity 110, and the placement position is formed on the side of the top end cover facing away from the accommodating cavity 110. The clamping member 210 partially passes through the third slide groove 120 and is connected to the first output shaft 222. The first output shaft 222 can drive the clamping member 210 to move along the first direction X.

[0064] In this way, placing the first transfer case 220 in the accommodating chamber 110 can avoid exposure of the transmission mechanism, thereby making the device look neat and tidy and protecting the transmission mechanism.

[0065] Furthermore, two third sliding grooves 120 are provided in parallel, and the clamping member 210 is respectively inserted into the two third sliding grooves 120 to maintain the stability of the clamping member 210 .

[0066] Optionally, the driving member is a first hand wheel 240, the first hand wheel 240 is at least partially located outside the accommodating cavity 110, the first hand wheel 240 is coaxially arranged and fixed with the first input shaft 221, the first input shaft 221 can rotate relative to the base 100, and the first input shaft 221 is meshed and driven with the first output shaft 222. In this way, the user can drive the two first output shafts 222 to rotate at the same time by rotating the first hand wheel 240, so that the two clamping members 210 can be moved closer to or farther from each other.

[0067] Optionally, a first bearing seat 130 is fixed in the accommodating cavity 110, and the first output shaft 222 is inserted in the first bearing seat 130. Exemplarily, the first bearing seat 130 is located between the housing of the first transfer case 220 and the first hand wheel 240, so as to provide a fulcrum for the first input shaft 221 of the first transfer case 220, reduce the swing of the first input shaft 221, and improve the transmission efficiency and transmission stability.

[0068] Optionally, the pressure test assembly 200 further includes a pad 230 . Two pads 230 are provided and are respectively placed on opposite sides of the battery cell 400 in the first direction X, and are clamped between the battery cell 400 and the clamp 210 .

[0069] For example, the contact area S1 between the pad 230 and the battery cell 400 satisfies S1≥S2, where S2 is the contact area between the clamp 210 and the battery cell 400 when the clamp 210 is in direct contact with the battery cell 400. According to the pressure calculation formula, P=F / S, where P is pressure, F is pressure, and S is contact area, it can be seen that when the pressure F is constant, the larger the contact area S, the smaller the pressure P. In this way, the clamp 210 can increase the contact area S through the pad 230, thereby reducing the pressure of the clamp 210 on the battery cell 400, so that the battery cell 400 can be evenly stressed, and local stress concentration of the battery cell 400 can be avoided.

[0070] Furthermore, the relative position relationship between the pad 230 and the clamping member 210 may be adjusted according to the structure of the battery cell 400 , so that the clamping member 210 can stably clamp the battery cell 400 .

[0071] Optionally, the clamping member 210 is provided with a hollow structure 211 .

[0072] Exemplarily, the clamping member 210 has weight-reducing holes along the first direction X. This configuration can reduce the weight of the clamping member 210 itself, so that the driving member can more easily drive the clamping member 210 to move along the first direction X, thereby reducing the output power requirement of the driving member.

[0073] Optionally, the pressure testing mechanism also includes a guardrail 150, which is installed on the base 100 and is located on the side of the second direction Y. The length direction of the guardrail 150 is parallel to the first direction X. The guardrail 150 can abut against the battery cell 400 in the second direction Y; the second direction Y is perpendicular to the first direction X.

[0074] Exemplarily, the guardrail 150 includes a connecting portion 152 and an intercepting portion 151, the length direction of the intercepting portion 151 is parallel to the first direction X, and is used to abut against the battery cell 400 in the second direction Y, the intercepting portion 151 and the base 100 are spaced apart in the third direction Z, and the connecting portion 152 connects the intercepting portion 151 and the base 100. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other. In this way, the battery cell 400 can be prevented from falling along the second direction Y. Further, the guardrail 150 can abut against multiple battery cells 400 in the second direction Y, so that the multiple battery cells 400 are aligned in the second direction Y.

[0075] Optionally, the base 100 is provided with a fourth slide groove 140 , the length direction of the fourth slide groove 140 is parallel to the second direction Y, and the guardrail 150 is partially inserted in the fourth slide groove 140 and can slide or lock relative to the base 100 along the fourth slide groove 140 .

[0076] Exemplarily, the connection portion 152 of the guardrail 150 is partially inserted into the fourth sliding groove 140 and can be moved or locked relative to the base 100 along the second direction Y, so as to accommodate different types of battery cells 400 .

[0077] Optionally, the pressure testing mechanism further includes a self-locking component, which can maintain the abutment force F of the clamping member 210 on the battery cell 400. When the abutment force F between the battery cell 400 and the clamping member 210 is greater than F threshold, the self-locking component fails and the clamping members 210 can move away from each other.

[0078] Exemplarily, the self-locking assembly includes a ratchet gear, a limit member and an elastic member, the ratchet gear is coaxially fixed to the first input shaft 221, the limit member is rotatably connected to the base 100, the rotation axis of the limit member is parallel to the second direction Y, the limit member includes a first dial head and a second dial head, the first dial head is used to be plugged into the ratchet gear to prevent the ratchet gear from rotating, the second dial head is exposed outside the base 100, the user can disengage the first dial head from the ratchet gear by turning the second dial head, and the elastic member ensures that the first dial head is always close to the ratchet gear.

[0079] Assume that when the first input shaft 221 rotates clockwise, the ratchet gear can rotate relative to the limit member, and the clamping members 210 can approach each other to apply pressure to the battery cell 400. During the test, the battery cell 400 applies a reverse force to the clamping member 210, so that the first output shaft 222 has a tendency to rotate counterclockwise. At this time, since the first dial head is inserted in the ratchet gear, self-locking is achieved, resulting in the first input shaft 221 being unable to rotate counterclockwise. When it is necessary to release the battery cell 400, the second dial head is turned so that the first dial head withdraws from the ratchet gear, and the first input shaft 221 can rotate counterclockwise. Furthermore, when the battery cell 400 fails during the test, the abutment force F>F 阈 , the first shift head fails and may bend or deform in other forms, thereby releasing the lock of the first input shaft 221 and allowing the clamping members 210 to move away from each other.

[0080] For example, in other embodiments, the self-locking assembly may further include a brake torsion spring and a brake drum. During the rotation of the first hand wheel 240, the radial dimension of the brake torsion spring can be adjusted according to the rotation direction. When the brake torsion spring abuts against the brake drum to generate greater friction, self-locking is achieved. This is a known technology and will not be described in detail here.

[0081] Optionally, the wiring board 310 is provided with a first slide groove 311, and the battery cell 400 includes two pole ears 410 arranged in sequence along the second direction Y. Two first sliders 320 are inserted in the first slide groove 311, which are used to correspond one-to-one with the two pole ears 410. The two first sliders 320 can approach or move away from each other along the second direction Y, and the first sliders 320 are both installed with probe modules 330; the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0082] In this way, when performing a current test on the battery cell 400, the distance between the two first sliders 320 in the first slide groove 311 is adjusted according to the structural characteristics of the battery cell 400 being tested, that is, the distance between the two pole ears 410 of the battery cell 400, so that the probe module 330 carried on the first slider 320 can contact the pole ears 410 one by one, which can meet the needs of current testing for various models of battery cells 400, thereby improving the compatibility of the current testing device with the battery cell 400.

[0083] Optionally, the current testing component 300 also includes a conductive patch, which includes a positive electrode patch 341 and a negative electrode patch 342. The positive electrode patch 341 and the negative electrode patch 342 are respectively arranged on the opposite side walls of the first slide groove 311 in the first direction X, and current flows through the conductive patch; in the same first slide groove 311, one of the first sliders 320 can be electrically connected to the positive electrode patch 341, and the other first slider 320 can be electrically connected to the negative electrode patch 342, and the probe module 330 is electrically connected to the conductive patch through the first slider 320.

[0084] Since the positive electrode patch 341 is arranged on one side wall of the first slide 311 in the first direction X, and the negative electrode patch 342 is arranged on the side wall opposite thereto, current is passed through the positive electrode patch 341 and the negative electrode patch 342, and the first slider 320 is a conductor, the probe module 330 can be electrically connected to the positive electrode patch 341 or the negative electrode patch 342 through the first slider 320. During the movement, both sides of the first slider 320 can always fit with the positive electrode patch 341 or the negative electrode patch 342 to maintain electrical connection, that is, the probe module 330 can remain energized at any position of the first slide 311, so that the wiring layout of the probe module 330 can be simplified.

[0085] Exemplarily, in the projection in the first direction X, the positive electrode patch 341 and the negative electrode patch 342 do not overlap, and are spaced apart in the second direction Y of the first slide slot 311 .

[0086] Exemplarily, in the first direction X, one side wall of the first slider 320 is conductive, and the other side is provided with an insulating layer and is non-conductive.

[0087] Optionally, the wiring board 310 is also provided with a second slide groove 312, each first slide groove 311 is configured with at least one second slide groove 312, the second slide groove 312 is arranged parallel to the first slide groove 311, and the first slider 320 can be at least partially inserted into the second slide groove 312 and can slide in the second slide groove 312.

[0088] Exemplarily, in this embodiment, the first slide groove 311 is respectively provided with a second slide groove 312 on both sides of the first direction X thereof, and the first slider 320 is T-shaped, including a mounting portion and two limiting portions, the two limiting portions are respectively located on the opposite sides of the mounting portion in the first direction X and are fixed to the mounting portion, the mounting portion is used to install the probe module 330, the probe module 330 and / or the mounting portion are inserted in the first slide groove 311, and part of the limiting portion is inserted in the second slide groove 312. Since the mounting portion and the limiting portion are relatively fixed, the relative limitation of the first slider 320 and the wiring board 310 can be achieved, thereby regulating the movement trajectory of the first slider 320 along the second direction Y.

[0089] Optionally, the first slider 320 includes a block body 321 and a threaded fastener, the probe module 330 is installed on the block body 321, a limiting protrusion 3121 is arranged in the second slide groove 312, the threaded fastener portion is inserted in the second slide groove 312 and is threadedly connected to the block body 321, and the limiting protrusion 3121 can be clamped between the block body 321 and the nut of the threaded fastener.

[0090] Exemplarily, the second slide groove 312 includes a first slit 3122 and a second slit 3123 along the third direction Z, wherein the first slit 3122 is opposite to the side of the second slit 3123 facing away from the battery cell 400, and in the first direction X, the gap of the first slit 3122 is smaller than the gap of the second slit 3123, and a contact surface, i.e., a limiting protrusion 3121, is formed between the first slit 3122 and the second slit 3123; a nut is provided at one axial end of the threaded fastener, and the threaded fastener can be inserted into the first slit 3122 and the second slit 3123 at the same time, and the nut can abut against the abutment surface along the third direction Z, i.e., abut against the limiting protrusion 3121, and the other end of the threaded fastener can be inserted into the block body 321 and threadedly connected to the block body 321. In this way, when it is necessary to adjust the relative position between the first sliders 320 according to the spacing between the tabs 410 of the battery cell 400, loosen the threaded fastener to separate the nut from the limiting protrusion 3121; after the first slider 320 moves to the specified position, tighten the threaded fastener to make the limiting protrusion 3121 abut against the nut, thereby increasing the friction force by increasing the pressure, thereby locking the relative position of the first slider 320 and the wiring board 310.

[0091] Optionally, a terminal 322 is provided on the side of the first slider 320 facing away from the battery cell 400, and the probe module 330 includes a probe and a sensor, the probe is electrically connected to the terminal 322, and the sensor is electrically connected to the conductive patch. Since the probe requires high voltage current and the sensor requires low voltage current, the circuits of the probe and the sensor are distinguished, which makes electricity use safer and can meet the electricity requirements of both.

[0092] Exemplarily, the sensor may acquire the temperature value of the battery cell 400 .

[0093] Optionally, the current testing assembly 300 also includes a lifting structure 360, which includes a second driving member and a threaded rod 362. The second driving member is installed on the base 100, and the axis of the threaded rod 362 is parallel to the third direction Z. One axial end of the threaded rod 362 is rotatably connected to the base 100, and the other axial end is threadedly connected to the wiring board 310. The output end of the second driving member can drive the threaded rod 362 to rotate around the axis of the threaded rod 362, so that the wiring board 310 can approach or move away from the base 100 along the third direction Z.

[0094] Specifically, in the third direction Z, the wiring board 310 includes a first position and a second position relative to the base 100. When the wiring board 310 is in the first position, the distance between the wiring board 310 and the base 100 in the third direction Z is H1. When the wiring board 310 is in the second position, the distance between the wiring board 310 and the base 100 in the third direction Z is H2, satisfying that H2

[0095] Optionally, the lifting structure 360 ​​further includes a second slider 363, the second slider 363 is fixed to the wiring board 310, and the threaded rod 362 is threadedly connected to the second slider 363. Such a configuration can reduce the difficulty of processing the wiring board 310, because the second slider 363 is provided with a threaded hole for threading with the threaded rod 362, and the second slider 363 can move the wiring board 310 along the axial direction of the threaded rod 362.

[0096] Exemplarily, the second slider 363 is fixed to the wiring board 310 via a flange structure.

[0097] ​Optionally, multiple threaded rods 362 are provided, and multiple threaded rods 362 are installed on the peripheral side of the fixed position, and at least two threaded rods 362 are symmetrically arranged and fixed on opposite sides of the second direction Y or the first direction X; the third direction Z, the second direction Y and the first direction X are perpendicular to each other.

[0098] Such a configuration can make the force on the wiring board 310 uniform, avoid local force, and maintain the stability of the wiring board 310 when the threaded rod 362 is driven.

[0099] Optionally, the lifting structure 360 ​​also includes a guide column 366, which is parallel to the threaded rod 362, with one axial end of the guide column 366 fixed to the base 100 and the other end inserted into the wiring board 310 and capable of relative movement along the axis of the guide column 366.

[0100] With such a configuration, the plug-in relationship between the guide column 366 and the wiring board 310 can limit the tendency of the wiring board 310 to rotate along with the threaded rod 362, maintain the stability of the wiring board 310, and provide more guide support for the wiring board 310. It can regulate the movement trajectory of the wiring board 310 along the third direction Z, and can ensure that the probe module 330 carried by the wiring board 310 remains aligned with the pole ear 410 of the battery cell 400.

[0101] Optionally, a linear bearing 367 is fixed to the wiring board 310 , and the guide column 366 is inserted into the linear bearing 367 .

[0102] In this configuration, the guide post 366 is connected to the wiring board 310 via the linear bearing 367 . When the wiring board 310 moves relative to the guide post 366 along the axis of the guide post 366 , the linear bearing 367 can reduce the friction between the guide post 366 and the wiring board 310 .

[0103] Optionally, in the projection in the third direction Z, the wiring board 310 is rectangular, four guide posts 366 are provided, respectively installed at the four top corners of the wiring board 310, two threaded rods 362 are provided, and the two threaded rods 362 are symmetrically arranged and fixed on opposite sides of the first direction X, and the threaded rod 362 is located between two adjacent guide posts 366.

[0104] This arrangement allows the wiring board 310 to be subjected to an even force, and when the threaded rod 362 drives the wiring board 310 to move, the wiring board 310 can remain stable, thereby ensuring that the relative position of the probe module 330 and the tab 410 of the battery cell 400 remains stable.

[0105] Optionally, the lifting structure 360 ​​also includes a stabilizing member 365, which connects two adjacent guide posts 366 at one end of the wiring board 310 facing away from the base 100, and the two guide posts 366 are fixedly located on the same side of the first direction X, and the threaded rod 362 is rotatably connected to the stabilizing member 365. Since one axial end of the two guide posts 366 is fixed to the base 100 and the other end is connected by the stabilizing member 365, the parallel relationship between the two guide posts 366 can be maintained, and it can be prevented that when the wiring board 310 moves toward the side of the base 100, the end of the guide post 366 away from the base 100 loses its constraint and shakes relatively, thereby affecting the trajectory of the wiring board 310 moving toward the base 100. Furthermore, the threaded rod 362 is rotatably connected to the stabilizing member 365, which can also ensure the stability of the parallel relationship between the threaded rod 362 and the guide post 366.

[0106] Optionally, the lifting structure 360 ​​also includes a second transfer case 364, which includes a second input shaft 3641 and multiple second output shafts 3642. The multiple second output shafts 3642 are transmission-connected to the multiple threaded rods 362 in a one-to-one correspondence. The second driving member is transmission-connected to the second input shaft 3641, and can drive the multiple threaded rods 362 to rotate simultaneously.

[0107] Exemplarily, in this embodiment, the second transfer case 364 includes a second case 3643, a second input shaft 3641, two second output shafts 3642 and a transmission gear set. The axial direction of the second input shaft 3641 is parallel to the second direction Y, one end of the second input shaft 3641 is inserted in the second case 3643 and can rotate relatively, the axial direction of the second output shaft 3642 is parallel to the first direction X, one end of the second output shaft 3642 is inserted in the second case 3643 and can rotate relatively, and in the second case 3643, the second input shaft 3641 and the second output shaft 3642 are connected by a transmission gear set. Further, the transmission gear set includes a driving gear and two driven gears, the driving gear is coaxially fixed to the second input shaft 3641, the driven gear is coaxially fixed to the second output shaft 3642, the driving gear and the driven gear are both bevel gears, which can mesh and transmit, so as to complete the reversing and diversion of the transmission.

[0108] Furthermore, the second output shaft 3642 is in transmission connection with the threaded rod 362 via a reversing transmission mechanism 3644. The reversing transmission mechanism 3644 can reverse the power transmitted along the first direction X to the third direction Z.

[0109] It should be noted that the reversing transmission mechanism 3644 is a prior art and will not be described in detail here.

[0110] Optionally, the driving member is a second hand wheel 361 , and the second hand wheel 361 is fixedly sleeved on the second input shaft 3641 .

[0111] Specifically, the second hand wheel 361 is coaxially arranged with the second output shaft 3642, and the second hand wheel 361 is fixedly sleeved on the second input shaft 3641. The user turns the second hand wheel 361 to make the second hand wheel 361 rotate around its own axis, thereby starting the second transfer case 364, and driving each threaded rod 362 to rotate through the second transfer case 364, thereby realizing the spacing adjustment between the wiring board 310 and the base 100.

[0112] Specifically, the base 100 is installed with a second bearing seat 368 , and the second input shaft 3641 is rotatably inserted in the second bearing seat 368 .

[0113] Optionally, the base 100 is provided with a plurality of mounting positions, which are arranged in sequence along the first direction X, the pressure testing assembly 200 is provided with a plurality of sets corresponding to the plurality of mounting positions one by one, and a plurality of probe modules 330 are provided, with each mounting position being configured with two probe modules 330 .

[0114] In this way, multiple installation positions enable the battery cell testing device to accommodate multiple battery cells 400 at the same time, and each battery cell 400 is configured with an independent pressure test assembly 200. The pressure test assembly 200 can apply pressure to the corresponding battery cell 400, and the magnitude of the applied pressure can be freely adjusted according to the test requirements of the battery cell 400, that is, the multiple pressure test assemblies 200 do not interfere with each other. Since the gap between the two clamps 210 can be adjusted, the pressure test assembly 200 can accommodate battery cells 400 of different specifications at the same time, and perform corresponding pressure tests on battery cells 400 of different specifications. Each installation position is configured with two probe modules 330, and the battery cell 400 can also perform current testing at the same time when performing a pressure test, thereby improving the test efficiency.

[0115] Furthermore, the wiring board 310 is provided with a plurality of first slide grooves 311, and the plurality of first slide grooves 311 are arranged in one-to-one correspondence with the plurality of installation positions, and two probe modules 330 are arranged in each first slide groove 311. In this way, the two first sliders 320 in each first slide groove 311 can carry the probe module 330 to adjust the relative position according to the spacing between the two tabs 410 of the corresponding battery cell 400, so that the current test of multiple battery cells 400 can be performed simultaneously, and the position of the probe module 330 can be adjusted according to different models of battery cells 400, thereby expanding the versatility of the current test device.

[0116] Furthermore, the conductive patches of the plurality of first chutes 311 are arranged in parallel. Such arrangement makes the plurality of first chutes 311 not affect each other, and when the probe modules 330 carried by the first sliders 320 in one part of the first chutes 311 are connected to the tabs 410 of the battery cell 400 to perform current testing, the probe modules 330 in the other part of the first chutes 311 can be in an idle state.

[0117] Further, the probe includes a first shaft section, a second shaft section and an elastic member, the first shaft section and the second shaft section are slidably connected along the third direction Z, the elastic member makes the first shaft section away from the second shaft section along the third direction Z, the first shaft section is used to contact the pole ear 410 of the battery cell 400, and the second shaft section is fixed to the wiring board 310. It is set that the height of the pole ear 410 from the base 100 in the third direction Z is D, and D>0 is satisfied. The value of D is different for different types of battery cells 400. When the probe contacts the pole ear 410 of the battery cell 400 with D=Dmax, the other probes have not yet contacted the pole ears 410 of other battery cells 400, and the wiring board 310 is continuously driven to move toward the side of the base 100. At this time, some probes have been in contact with the corresponding pole ears 410, and elastic deformation occurs, that is, the first shaft section gradually retreats into the second shaft section and the elastic member makes the first shaft section always keep in contact with the corresponding pole ear 410, until the pole ears 410 of all battery cells 400 are in contact with the corresponding probes, and electrical connection is achieved.

[0118] Optionally, the wiring board 310 is also provided with a wiring groove 313, which includes a positive groove 313a and a negative groove 313b. The positive groove 313a is used to set the positive wiring harness, and one end of the positive wiring harness is electrically connected to one of the probe modules 330. The negative groove 313b is used to set the negative wiring harness, and one end of the negative wiring harness is electrically connected to another probe module 330. The wiring board 310 is also fixed with a conductive column 314, including a positive column 314a and a negative column 314b. The positive column 314a is at least partially installed in the positive groove 313a for connecting to the other end of multiple positive wiring harnesses, and the negative column 314b is at least partially installed in the negative groove 313b for connecting to the other end of multiple negative wiring harnesses.

[0119] The wiring board 310 is provided with a wiring groove 313, and the wiring harness of the probe module 330 is arranged in the wiring groove 313 to avoid being scattered, and the wiring groove 313 is divided into a positive groove 313a and a negative groove 313b, which separates the wiring harnesses of the two probe modules 330 serving the same installation position to avoid short circuit after the positive wiring harness and the negative wiring harness come into contact. Furthermore, the wiring board 310 is provided with a positive pole column 314a and a negative pole column 314b, and the positive pole column 314a can be electrically connected to multiple positive wiring harnesses, and the negative pole column 314b can be electrically connected to multiple negative wiring harnesses. In this way, the wiring ports required for the wiring board 310 can be reduced. When the positive pole column 314a and the negative pole column 314b are connected to the power supply, the probe modules 330 corresponding to different installation positions are connected in parallel, and the on and off are independent.

[0120] Optionally, the wiring board 310 is an insulator. This arrangement can avoid short circuits between the positive and negative electrodes.

[0121] In other embodiments, an insulating layer is disposed in the first sliding groove 311 and the wiring groove 313 .

[0122] Furthermore, the positive electrode slot 313a and the negative electrode slot 313b are connected to the plurality of first chutes 311 , the positive electrode wiring harness in the positive electrode slot 313a is electrically connected to the positive electrode patch 341 , and the negative electrode wiring harness in the negative electrode slot 313b is electrically connected to the negative electrode patch 342 .

[0123] Optionally, in the second direction Y, the positive electrode slot 313a and the negative electrode slot 313b are respectively located on opposite sides of the first slide slot 311. In this way, the positive electrode harness and the negative electrode harness are also arranged at intervals in the second direction Y to avoid entanglement between the positive electrode harness and the negative electrode harness and short circuit.

[0124] Optionally, in the third direction Z, the positive electrode slot 313a and the negative electrode slot 313b are located on the same side of the wiring board 310, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other. In this way, the wiring board 310 is easily processed and the wiring board 310 is relatively flat on the other side of the third direction Z.

[0125] In this embodiment, in the third direction Z, the wiring groove 313 is opened on a side of the wiring board 310 facing the base 100 .

[0126] In other embodiments, the positive electrode slot 313 a and the negative electrode slot 313 b are respectively disposed on two opposite sides of the wiring board 310 in the third direction Z.

[0127] Optionally, in the first direction X, the positive pole 314a and the negative pole 314b are located on the same side of the wiring board 310. This arrangement facilitates the connection of a power source or other electrical devices to the positive pole 314a and the negative pole 314b.

[0128] Optionally, the wiring trough 313 includes a branch section 3131 and a main section 3132, and a plurality of branch sections 3131 are provided, and the plurality of branch sections 3131 are arranged in sequence along the first direction X, one end of the branch section 3131 is connected to one end of the first slide trough 311 in the second direction Y, a portion of the main section 3132 extends along the first direction X, and is connected in sequence to the other ends of the plurality of branch sections 3131, and another portion of the main section 3132 is installed with a conductive column 314.

[0129] In this way, multiple branch sections 3131 are gathered into the same trunk section 3132, which can reduce the number of slots in the wiring board 310, thereby improving the structural strength of the wiring board 310. At the same time, it is also convenient for wiring and avoids short circuit problems caused by the entanglement of the wire harness.

[0130] Optionally, a chamfer is provided at the intersection of the branch section 3131 and the trunk section 3132. Exemplarily, the chamfer is an arc angle, so that when the positive electrode wire harness is gathered from the branch section 3131 to the trunk section 3132, a smooth transition is formed at the intersection, reducing the bending of the wire harness. Similarly, when the negative electrode wire harness is gathered from the branch section 3131 to the trunk section 3132, a smooth transition is formed at the intersection, reducing the bending of the wire harness.

[0131] In addition, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A battery cell testing device, characterized in that: include: A base (100), the base (100) being provided with a mounting position, the mounting position being used to place a battery cell (400), the tab (410) of the battery cell (400) being oriented in a third direction (Z); A pressure test assembly (200), the pressure test assembly (200) comprising a clamping member (210) and a pressure sensor, wherein two clamping members (210) are provided and are arranged in a mirror-like manner on two opposite sides of the installation in a first direction (X), the two clamping members (210) can move closer to or farther from each other along the first direction (X) to clamp or release the battery cell (400), and the pressure sensor is used to obtain a pressure value between the clamping member (210) and the battery cell (400); A current test assembly (300), the current test assembly (300) comprising a wiring board (310), a probe module (330) and a battery simulator unit, the wiring board (310) being equipped with the probe module (330), the wiring board (310) being able to approach or move away from the base (100) along the third direction (Z), so that the probe module (330) is in corresponding contact with the tab (410) to connect the battery simulator unit and the battery cell (400); The first direction (X) is perpendicular to the third direction (Z).

2. The battery cell testing device according to claim 1, characterized in that: The pressure test assembly (200) further comprises a first driving member and a first transfer case (220), wherein the first transfer case (220) comprises a first input shaft (221) and two first output shafts (222) which are both transmission-connected thereto, wherein the first driving member is capable of driving the first input shaft (221), and the two first output shafts (222) are connected to the two clamping members (210) in a one-to-one correspondence, and are capable of driving the two clamping members (210) to move closer to or farther from each other along the first direction (X).

3. The battery cell testing device according to claim 2, characterized in that: The pressure test assembly (200) further comprises a pad (230), wherein two pads (230) are provided and are respectively placed on opposite sides of the battery cell (400) in the first direction (X), and are clamped between the battery cell (400) and the clamping member (210).

4. The battery cell testing device according to claim 1, characterized in that: The wiring board (310) is provided with a first slide groove (311), the battery cell (400) comprises two pole ears (410) arranged in sequence along a second direction (Y), two first sliders (320) are inserted in the first slide groove (311) for corresponding to the two pole ears (410) one by one, the two first sliders (320) can approach or move away from each other along the second direction (Y), and the first sliders (320) are both installed with the probe module (330); The first direction (X), the second direction (Y) and the third direction (Z) are perpendicular to each other.

5. The battery cell testing device according to claim 4, characterized in that: The current testing component (300) further comprises a conductive patch, wherein the conductive patch comprises a positive electrode patch (341) and a negative electrode patch (342), wherein the positive electrode patch (341) and the negative electrode patch (342) are respectively arranged on opposite side walls of the first slide slot (311) in the first direction (X), and current flows through the conductive patch; within the same first slide slot (311), one of the first sliders (320) can be electrically connected to the positive electrode patch (341), and another of the first sliders (320) can be electrically connected to the negative electrode patch (342), and the probe module (330) is electrically connected to the conductive patch via the first slider (320).

6. The battery cell testing device according to claim 1, characterized in that: The current test assembly (300) further includes a lifting structure (360), wherein the lifting structure (360) includes a second driving member and a threaded rod (362), wherein the second driving member is mounted on the base (100), wherein the axis of the threaded rod (362) is parallel to the third direction (Z), wherein one axial end of the threaded rod (362) is rotationally connected to the base (100), and the other axial end is threadedly connected to the wiring board (310), and the output end of the second driving member can drive the threaded rod (362) to rotate around the axis of the threaded rod (362), so that the wiring board (310) can move closer to or farther away from the base (100) along the third direction (Z).

7. The battery cell testing device according to claim 6, characterized in that: The lifting structure (360) further includes a second transfer case (364), which includes a second input shaft (3641) and a plurality of second output shafts (3642), wherein the plurality of second output shafts (3642) are transmission-connected to the plurality of threaded rods (362) in a one-to-one correspondence, and the second driving member is transmission-connected to the second input shaft (3641), and can simultaneously drive the plurality of threaded rods (362) to rotate.

8. The battery cell testing device according to claim 4, characterized in that: The base (100) is provided with a plurality of the mounting positions, and the plurality of the mounting positions are arranged in sequence along the first direction (X); the pressure testing assembly (200) is provided with a plurality of sets corresponding one-to-one to the plurality of the mounting positions; the probe module (330) is provided with a plurality of sets, and each mounting position is configured with two probe modules (330).

9. The battery cell testing device according to claim 8, characterized in that: The wiring board (310) is further provided with a wiring groove (313), wherein the wiring groove (313) includes a positive electrode groove (313a) and a negative electrode groove (313b), wherein the positive electrode groove (313a) is used to set a positive electrode wire harness, and one end of the positive electrode wire harness is electrically connected to one of the probe modules (330), and the negative electrode groove (313b) is used to set a negative electrode wire harness, and one end of the negative electrode wire harness is electrically connected to another probe module (330); The wiring board (310) is also fixed with a conductive column (314), including a positive column (314a) and a negative column (314b), wherein the positive column (314a) is at least partially installed in the positive electrode slot (313a) for connecting to the other end of the plurality of positive electrode wire harnesses, and the negative column (314b) is at least partially installed in the negative electrode slot (313b) for connecting to the other end of the plurality of negative electrode wire harnesses.

10. The battery cell testing device according to claim 9, characterized in that: In the third direction (Z), the wiring groove (313) is opened on a side of the wiring board (310) facing the base (100).

Images