CN220084891U - Battery cell testing device - Google Patents

Abstract

The utility model discloses a battery cell testing device. The battery cell testing device comprises a testing jig, a driving element and a voltage detection unit. The test fixture includes a first portion and a second portion. The first part comprises a placing groove and a first electrode, the placing groove is used for accommodating the battery cell, and the first electrode is arranged on the first side of the placing groove; the second portion is movably disposed relative to the first portion and includes a second electrode disposed on a second side of the placement slot opposite the first side. The driving element is connected with the first part and/or the second part and is used for driving the first part and/or the second part to move relatively. The first electrode is used for clamping or releasing the battery cell on the first side, and the second electrode is used for clamping or releasing the battery cell on the second side. The voltage detection unit is respectively communicated with the positive electrode lug and the negative electrode lug of the battery cell through the first electrode and the second electrode, and is further used for detecting the voltage of the battery cell. Through the mode, the testing efficiency of the battery cell is improved.

Description

Battery cell testing device

Technical Field

The utility model relates to the technical field of battery cell detection equipment, in particular to a battery cell testing device.

Background

In the process of producing the electronic atomizer, the battery cell used in the electronic atomizer needs to be tested, so that a tester needs to be used in the process of testing. However, the existing tester has complicated testing steps, and meanwhile, more professional testers are needed in the testing process, so that the labor cost is high, and the testing efficiency of the battery cell is low.

Disclosure of Invention

The utility model mainly solves the technical problem of providing a battery cell testing device which can improve the detection efficiency of a battery cell.

In order to solve the technical problems, the utility model adopts a technical scheme that: an electrical core testing device is provided. The battery cell testing device comprises a testing jig, a driving element and a voltage detection unit. The test fixture includes a first portion and a second portion. The first part comprises a placing groove and a first electrode, the placing groove is used for accommodating the battery cell, and the first electrode is arranged on the first side of the placing groove; the second portion is movably disposed relative to the first portion and includes a second electrode disposed on a second side of the placement slot opposite the first side. The driving element is connected with the first part and/or the second part and is used for driving the first part and/or the second part to move relatively. The first electrode is used for clamping or releasing the battery cell on the first side, and the second electrode is used for clamping or releasing the battery cell on the second side. The battery core is provided with a positive electrode tab and a negative electrode tab, the second electrode is used for being conducted with one of the positive electrode tab and the negative electrode tab, and the first electrode is used for being conducted with the other of the positive electrode tab and the negative electrode tab. The voltage detection unit is conducted with one of the positive electrode tab and the negative electrode tab through the first electrode, and is conducted with the other of the positive electrode tab and the negative electrode tab through the second electrode, so that the voltage detection unit is used for detecting the voltage of the battery cell.

The beneficial effects of the utility model are as follows: in addition, the first part is provided with a first electrode and a placing groove, the battery cell can be accommodated in the placing groove, the positive electrode lug or the negative electrode lug of the battery cell is communicated with the first electrode, the second part is arranged on one side of the first part, and the first part and/or the second part are driven by the driving element to move in opposite directions, so that the other one of the positive electrode lug or the negative electrode lug of the battery cell in the placing groove in the first part is communicated with the second electrode, and the efficiency of testing the battery cell is improved.

Drawings

FIG. 1 is an exploded perspective view of a first embodiment of a cell testing device according to the present utility model;

FIG. 2 is an exploded perspective view of a second embodiment of a cell testing device according to the present utility model;

FIG. 3 is an exploded perspective view of a third embodiment of the cell testing device of the present utility model;

FIG. 4 is a schematic perspective view of a fourth embodiment of the cell testing device of the present utility model;

FIG. 5 is a schematic diagram of a partial perspective view of a testing fixture of the embodiment of the electrical core testing device shown in FIG. 4;

fig. 6 is a schematic perspective exploded view of a fifth embodiment of a battery cell testing device according to the present utility model.

Reference numerals illustrate: 100. the battery cell testing device; 1. testing a jig; 2. a driving element; 3. a voltage detection unit; 4. a base; 5. a first directional movement assembly; 6. a carrier assembly; 7. a second direction movement assembly; 8. a third directional movement assembly; 9. a jaw assembly; 11. a first portion; 111. a placement groove; 1111. a first side; 1112. a second side; 112. a first electrode; 113. a long groove; 12. a second portion; 121. a second electrode; 122. a slide block; 123. a plate-like structure; 1231. a groove; 13. a supporting plate, 131 and a chute; 14. a convex plate; 15. a base; 21. a main body portion; 22. and a power output unit.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The terms "first," "second," and the like herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship. Further, "a plurality" herein means two or more than two.

The electronic atomizer is an atomizing device driven by a rechargeable lithium polymer battery, and the liquid matrix in a liquid storage tank of the electronic atomizer is atomized into aerosol through the internal atomizer for a user to inhale. The cell is a key component in the electronic atomizer and is used for supplying power to the electronic atomizer, and the cell refers to a single electrochemical cell containing a positive electrode and a negative electrode. The inventor discovers in the research process that each battery cell needs to be tested by a tester one by one manually, so that the test efficiency is low; therefore, the present inventors have proposed a device for testing a battery cell to improve the testing efficiency.

The following embodiments of the present utility model describe exemplary structures of the cell testing device 100.

As shown in fig. 1, a cell testing apparatus 100 is provided. The cell testing device 100 includes a testing jig 1, a driving element 2 and a voltage detecting unit 3.

As shown in fig. 1, the test fixture 1 includes a first portion 11 and a second portion 12. The first part 11 comprises a placement groove 111 for receiving a battery cell and a first electrode 112, the first electrode 112 being arranged at a first side 1111 of the placement groove 111. The second portion 12 is movably arranged relative to the first portion 11 and comprises a second electrode 121. The second electrode 121 is disposed on a second side 1112 of the placement groove 111 opposite the first side 1111. The driving element 2 is connected to the first part 11 and/or the second part 12 for driving the first part 11 and/or the second part 12 in a relative movement. The first electrode 112 is used to clamp or unclamp the cell at the first side 1111 and the second electrode 121 is used to clamp or unclamp the cell at the second side 1112. The battery cell has a positive electrode tab and a negative electrode tab, the second electrode 121 is used for conducting with one of the positive electrode tab and the negative electrode tab, and the first electrode 112 is used for conducting with the other of the positive electrode tab and the negative electrode tab. The voltage detection unit 3 is conducted with one of the positive electrode tab and the negative electrode tab through the first electrode 112, and is conducted with the other of the positive electrode tab and the negative electrode tab through the second electrode 121, so as to be used for detecting the voltage of the battery cell.

The battery cell of the electronic atomizer can also comprise a positive pole piece, a negative pole piece, an isolating film, electrolyte, a metal shell and the like. The battery cell yield test can be performed by adopting an industry standard voltage test mode to determine whether the preset electric quantity is reached. The rated voltage of the battery cell common in the industry is usually 4.2V, 3.8V and the like. If the voltage of the cell is significantly below the predetermined value, this indicates that the cell may be under-charged or that the cell is not acceptable. And detecting the voltage of the battery cell stored according to the preset time, and detecting whether the battery cell has electric leakage, attenuation and the like in the period of normal storage. The voltage detection unit 3 may be a multimeter or an OCV (Open Ci rcuit Vo ltage ) detector or the like.

The first electrode 112 provided on the first side 1111 of the placement groove 111 may be a positive electrode or a negative electrode, and for example, may be made of a metal such as copper or iron having good conductivity. The first electrode 112 is used for being electrically connected with the tab of the battery cell opposite to the first electrode. The polarity of the second electrode 121 provided in the second portion 12 is opposite to that of the first electrode 112, and the material may be a metal such as copper or iron having good conductivity. The second electrode 121 is used for being electrically conducted with the other tab of the battery cell. For example, the second portion 12 is spaced from the placement slot 111 in the first state, thereby facilitating placement of the cells in the placement slot 111. The driving element 2 may drive the first portion 11 and/or the second portion 12 towards each other so that the battery cells accommodated in the placement groove 111 and the second electrode 121 of the second portion 12 are in electrical conduction with the battery cells, thus forming an electrical connection. For example, the first portion 11 is stationary and the driving element 2 moves the second portion 12 towards the first portion; or the second part 12 is stationary, the driving element 2 moving the first part 11 towards the second part; or the driving element 2 brings the first and second portions 12 into simultaneous movement in directions towards each other. Specifically, the first electrode 112 may be electrically connected to the positive electrode tab of the battery cell, the second electrode 121 may be electrically connected to the negative electrode tab of the battery cell, and further the first electrode 112 and the second electrode 121 are electrically connected to the voltage detection unit, respectively, so that the first electrode 112, the second electrode 121, the battery cell, and the voltage detection unit constitute a closed loop. If the battery cell has insufficient electric quantity or other defects, the voltage detection unit can directly detect the electric quantity.

The first part 11 is provided with the first electrode 112 and the placing groove 111, the battery cell can be accommodated in the placing groove 111, one lug of the battery cell is contacted with the first electrode 112, the second part 12 is arranged on one side of the first part 11, and the first part 11 and/or the second part 12 are driven by the driving element 2 to move towards the direction close to each other, so that the second electrode 121 arranged on the second part 12 is communicated with the other lug of the battery cell, and the efficiency of battery cell testing is improved.

In some embodiments, as shown in fig. 2, the test fixture 1 may further include a support plate 13, the first portion 11 is fixedly disposed on the support plate 13, the first electrode 112 is a fixed electrode, the second portion 12 is movably disposed on the support plate 13, and the second electrode 121 is a movable electrode. The driving element 2 is connected to the second part 12 for driving the second part 12 in movement relative to the first part 11. The first portion 11 may be fixed to the support plate 13 by riveting, screwing, or the like, and the second portion 12 may be slidably connected to the support plate 13. Specifically, one of the second portion 12 and the support plate 13 is provided with a slide groove, and the other of the second portion 12 and the support plate 13 is provided with a slider. For example, as shown in fig. 2, the second portion 12 may include a slider 122, and the support plate 13 may be provided with a chute 131. The second portion 12 may be movably disposed on the support plate 13 in other manners, which will not be described herein.

Firstly, the battery cell is placed in the placement groove 111, so that one tab of the battery cell is conducted with the first electrode 112 fixed on the first portion 11, and the driving element 2 can drive the second portion 12 to move towards the first portion 11, so that the battery cell accommodated in the placement groove 111 is conducted with the second electrode 121 of the second portion 12 and the other tab of the battery cell, and thus electrical connection is formed. The first electrode 112 may be electrically connected to the positive electrode tab of the battery cell, the second electrode 121 may be electrically connected to the negative electrode tab of the battery cell, and the first electrode 112 and the second electrode 121 are electrically connected to the voltage detection unit, respectively, so that the first electrode 112, the second electrode 121, the battery cell, and the voltage detection unit form a closed loop.

By fixing the first portion 11, the driving element 2 drives the second portion 12 to move towards the first portion 11, so that the second electrode 121 disposed on the second portion 12 is conducted with the other tab of the battery cell. The arrangement mode is beneficial to improving the flexibility of the cell test.

In some embodiments, as shown in fig. 3, the test fixture 1 may further include a support plate 13, where the first portion 11 is movably disposed on the support plate 13, and the second portion 12 is movably disposed on the support plate 13. The number of driving elements 2 is two, wherein one driving element 2 is connected to the first part 11 and wherein the other driving element 2 is connected to the second part 12 such that the second part 12 is movable relative to the first part 11.

Wherein the first portion 11 and the second portion 12 are slidably connected to the support plate 13. For example, one of the first portion 11 and the support plate 13 is provided with a magnetic attraction member, and the other of the first portion 11 and the support plate 13 is provided with a magnetic attraction member or a magnet; one of the second portion 12 and the support plate 13 is provided with a magnetic attraction member, and the other of the second portion 12 and the support plate 13 is provided with a magnetic attraction member or a magnet. The first portion 11 and the second portion 12 may be movably disposed on the support plate 13 in other manners, which will not be described herein.

By driving the first portion 11 and the second portion 12 to move toward directions approaching each other, the second electrode 121 disposed on the second portion 12 is conducted with the other tab of the battery cell. The arrangement mode is beneficial to improving the flexibility of the cell test.

In some embodiments, as shown in fig. 4 and 5, the first portion 11 is provided with a plurality of the placement grooves 111, the plurality of placement grooves 111 being arranged in 2 rows and N columns, where N is an integer equal to or greater than 1. The placement grooves 111 in each column are arranged in a first direction X, the placement grooves 111 of each row are arranged in a second direction Y perpendicular to the first direction X, the first sides 1111 of the placement grooves 111 of each row are aligned and are each provided with one first electrode 112. Each second portion 12 includes N second electrodes 121, and the N second electrodes 121 are disposed in one-to-one correspondence with the placement grooves 111 of each row. When the cell testing apparatus 100 is horizontally disposed and the first portion 11 is in the shape of a square column, the first direction Y is a horizontal direction, i.e. a length direction of the first portion 11.

Specifically, the first portion 11 may be provided with two placement grooves 111 along the first direction X, the first sides 1111 of the two placement grooves 111 being close to each other and each provided with one first electrode 112. The number of the second parts 12 and the driving elements 2 is two, the two second parts 12 are respectively arranged at two sides of the first part 11, and the two driving elements 2 are respectively connected with the two second parts 12. When the cell testing apparatus 100 is horizontally disposed and the first portion 11 is in the shape of a square column, the first direction X may be a horizontal direction, that is, a width direction of the first portion 11. Two placing grooves 111 are formed in the first portion 11 along the first direction X, and two driving elements 2 are respectively arranged on two sides of the first portion 11 along the first direction X, so that two second portions 12 can be simultaneously driven to move towards the battery cells in the two placing grooves 111, the two battery cells can be conveniently tested at the same time, and testing efficiency can be further improved.

For example, in these embodiments, N is 6, i.e., the first portion 11 is provided with 2 rows and 6 columns of 12 placement slots 111 along the first direction X. In other embodiments, the number of N may be 2, 3, 4, 5, 7, 8, 9, etc. The second portions 12 are arranged on both sides of the first portion 11 in the first direction X, respectively, and the driving elements 2 are arranged on both sides of the second portions 12 in the first direction X, respectively. The first portion 11 is provided with 2 rows and N columns of placing grooves 111, and the driving element 2 can respectively drive the two second portions 12 to move towards the electric cores in the two placing grooves 111, so that a plurality of electric cores can be tested at the same time, and the testing efficiency can be further improved.

In some embodiments, referring to fig. 4 and 5, the placement groove 111 extends along the first direction X to be an open-top structure. In a second direction Y perpendicular to the first direction X, both sides of the placement groove 111 communicate with the operation space. Wherein the shape of the placement groove 111 may be adapted to the battery cells, for example, both of a cylindrical shape, a square cylindrical shape, etc., thus allowing the battery cells to be stably defined in the placement groove 111. The top of the placement groove 111 is of an open structure, so that the battery cell can be accommodated in the placement groove.

Alternatively, the first portion 11 may be provided with an elongated slot 113 along its second direction Y. The long grooves 113 penetrate through the N placement grooves 111. Specifically, the number of the long slots 113 is two, and the height of the long slots 113 from the bottom side of the first portion 11 along the third direction Z perpendicular to the first direction X and the second direction Y is greater than the height of the placing slots 111 from the bottom side of the first portion 11 along the third direction Z, so that when the battery cells are accommodated in the placing slots 111, the battery cells are conveniently taken out through the long slots 113, and the probability that the battery cells are clamped in the placing slots 111 is reduced. When the cell testing device 100 is placed horizontally and the first portion 11 is in the shape of a square column, the third direction Z is a vertical direction, i.e. the height direction of the first portion 11.

In some embodiments, as shown in fig. 4 and 5, the second portion 12 includes a plate-like structure 123, and the drive element 2 includes a main body portion 21 and a power output portion 22, the power output portion 22 being connected to the second portion 12 and configured to move relative to the main body portion 21. The side of the power output portion 22 facing the plate-shaped structure 123 may be flat, so that the power output portion 22 and the plate-shaped structure 123 are connected together in a fitting manner, so as to better drive the plate-shaped structure 123 to move toward the placement groove 111. Alternatively, the side of the plate-like structure 123 facing the power output portion 22 may be provided with a groove 1231. The shape of the recess 1231 is adapted to the shape of the power output portion 22 facing the side thereof, and may be, for example, a square cylinder, a cylinder, an elliptic cylinder, or the like. The power output portion 22 may be fixed to the groove 1231 by rivet, screw, or the like. In this way, the power output portion 22 is more stably fixed to the second portion 12, and the probability of displacement is reduced.

In some embodiments, referring to fig. 1 to 5, the driving element 2 is a cylinder. The main body 21 corresponds to the body of the cylinder, and the power output unit 22 corresponds to the piston rod connected to the cylinder. The piston rod moves the second part 12 back and forth towards the first part 11. In other embodiments, the driving element 2 may be any other device capable of providing power.

Alternatively, as shown in fig. 4 and 5, the test fixture 1 may further include a convex plate 14 and a base 15. The convex plate 14 is disposed on the base 15, and the first portion 11 is disposed on a side of the convex plate 14 away from the base 15. The first portion 11, the support plate 13, the convex plate 14 and the base 15 may be detachably connected, such as by rivet, bolts, etc., for easy installation and removal. The body portion 21 may be fixedly disposed on the base 15.

In some embodiments, as shown in fig. 6, the cell testing device 100 further includes a base 4, and the test fixture 1 is disposed on the base 4. For example, the test fixture 1 may be movably connected or fixedly connected to the base 4 by riveting, bolting, welding, or the like.

In some embodiments, referring to fig. 6, the battery cell testing apparatus 100 further includes a first direction movement assembly 5, a carrier assembly 6, a second direction movement assembly 7, a third direction movement assembly 8, and a jaw assembly 9.

The first direction movement assembly 5 is adapted to provide a back and forth movement in a first direction X. The carrier assembly 6 is used for placing the battery cell, and the carrier assembly 6 is arranged on the first direction movement assembly 5 so as to be driven to move by the first direction movement assembly 5. The second direction movement assembly 7 is adapted to provide a back and forth movement in a second direction Y perpendicular to the first direction X. The third direction movement assembly 8 is provided on the second direction movement assembly 7 to be moved by the second direction movement assembly 7, and is for providing a reciprocating movement in a third direction Z, which is perpendicular to the first direction X and the second direction Y. The clamping jaw assembly 9 is arranged on the third direction movement assembly 8 to be driven to move by the third direction movement assembly 8 and is used for clamping and releasing the battery cell.

Wherein, the first direction motion component 5 is configured to drive the carrier component 6 to move to the feeding level, and the second direction motion component 7 and the third direction motion component 8 are configured to drive the clamping jaw component 9 to place the electric core on the carrier component 6 at the feeding level on the first portion 11.

Alternatively, the first direction moving assembly 5 and the second direction moving assembly 7 may be provided on the base 4, respectively.

Specifically, the first direction movement assembly 5 may be disposed at any one side of the test jig 1 in the second direction Y thereof. Alternatively, the carrier assembly 6 may be driven to reciprocate in the first direction X by means of a belt, pulley, gear, etc. on the first direction movement assembly 5. Further, the carrier assembly 6 may also be provided with a plurality of battery cell accommodating grooves oppositely, which may be arranged in the same manner and in the same positions (e.g. 2 rows and N columns) as the arrangement manner and positions of the placement grooves 111 of the first portion 11 of the test fixture 1, and the number of the battery cell accommodating grooves may be at least one time that of the placement grooves 111, for example, 4 rows and N columns; 6 rows, N columns, 8 rows, N columns, etc.

The second direction movement assembly 7 may be provided at any one side of the test fixture 1 in the first direction X thereof. The third moving component 7 is disposed on the second moving component 7 and is spaced from the test fixture 1 in a third direction Z. Alternatively, the second direction moving component 7 may drive the third moving component 7 to reciprocate along the second direction Y by means of a conveyor belt, a pulley, a gear, etc. Alternatively, the third direction moving component 8 may also drive the clamping jaw component 9 to reciprocate along the third direction Z by means of a conveyor belt, a pulley, a gear, etc. Further, the jaw assembly 9 may also be provided with a plurality of jaw members, one for each cell of its corresponding position, oppositely. The arrangement and position of the jaw members may be the same as the arrangement and position (e.g., 2 rows, N columns) of the placement slots 111 of the first portion 11 of the test fixture 1, such that each jaw member grips one cell in a corresponding position.

As shown in fig. 4 and fig. 6, when the second direction moving component 7 drives the third moving component 7 to move to the feeding position on one side of the second direction Y (horizontal direction) of the test fixture 1, the third moving component 7 can further drive the clamping jaw component 9 to grab the to-be-tested battery cell in the placement groove 111 in the carrier component 6 downwards along the third direction Z (vertical direction), and after the third moving component 7 drives the clamping jaw component 9 to grab the battery cell, the third moving component moves for a certain distance along the third direction Z far away from the carrier component 6, and thereafter, the second moving component 6 drives the clamping jaw component 9 to move to the upper side of the first part 11 of the test fixture 1 along the second direction Y again so as to place the battery cell in the placement groove 111 of the first part 11.

In some embodiments, the second directional movement assembly 7 and the third directional movement assembly 8 are further configured to drive the clamping jaw assembly 9 to place the battery cells on the first portion 11 on the carrier assembly 6 at the loading level.

As shown in fig. 4 and fig. 6, when the second direction moving assembly 7 drives the third moving assembly 7 to move above the first portion 11 of the test fixture 1 along the third direction Z (vertical direction), the third moving assembly 7 can further drive the clamping jaw assembly 9 to hold the tested battery cell in the placing groove 111 in the test fixture 1 along the third direction Z (vertical direction) Fang Zhuaqu, and after the third moving assembly 7 drives the clamping jaw assembly 9 to grasp the battery cell, the third moving assembly moves a certain distance along the third direction Z far away from the test fixture 1, and thereafter, the second moving assembly 6 drives the clamping jaw assembly 9 to move to the carrier assembly 6 along the second direction Y again, so as to place the battery cell in the carrier assembly 6.

In some embodiments, the number of carrier assemblies 6 is two, and the carrier assemblies are respectively disposed at two sides of the first portion 11 along the second movement direction Y. Correspondingly, the number of first direction moving assemblies 5 may include two, and may be disposed at both sides of the first portion 11 along the second direction Y, respectively. In this case, the two carrier elements 6 can be moved to or from the loading level by the first directional movement element 5, respectively. Further, the two carrier assemblies 6 located at two sides of the first portion 11 in the second direction Y may be mutually matched, and are respectively used for accommodating the to-be-tested battery cell and the battery cell after the test, so that the operator can distinguish the battery cells conveniently. Thus, the operation efficiency of the cell testing device 100 can be further improved.

In summary, the first portion 11 is provided with the first electrode 112 and the placement groove 111, the battery cell can be accommodated in the placement groove 111, and one of the tabs of the battery cell contacts with the first electrode 112, and the second portion 12 is disposed at one side of the first portion 11, and the driving element 2 drives the first portion 11 and/or the second portion 12 to move towards the direction close to each other, so that the second electrode 121 disposed at the second portion 12 is conducted with the other tab of the battery cell, which is beneficial to improving the efficiency of the battery cell test.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.

Claims (10)

1. A cell testing device, comprising:

the test fixture comprises a first part and a second part; the first part comprises a placing groove and a first electrode, the placing groove is used for accommodating the battery cell, and the first electrode is arranged on the first side of the placing groove; the second part is movably arranged relative to the first part and comprises a second electrode, and the second electrode is arranged on a second side of the placing groove opposite to the first side;

a driving element connected with the first part and/or the second part and used for driving the first part and/or the second part to move relatively; the first electrode is used for clamping or loosening the battery cell on the first side, and the second electrode is used for clamping or loosening the battery cell on the second side; the battery core is provided with a positive electrode tab and a negative electrode tab, the second electrode is used for being conducted with one of the positive electrode tab and the negative electrode tab, and the first electrode is used for being conducted with the other of the positive electrode tab and the negative electrode tab;

and the voltage detection unit is communicated with one of the positive electrode tab and the negative electrode tab through the first electrode, and is communicated with the other of the positive electrode tab and the negative electrode tab through the second electrode, so that the voltage detection unit is used for detecting the voltage of the battery cell.

2. The device for testing a battery cell according to claim 1, wherein,

the test fixture comprises a support plate, the first part is fixedly arranged on the support plate, the first electrode is a fixed electrode, the second part is movably arranged on the support plate, the second electrode is a movable electrode, and the driving element is connected with the second part and used for driving the second part to move relative to the first part.

3. The device for testing a battery cell according to claim 1, wherein,

the test fixture comprises a support plate, wherein the first part is movably arranged on the support plate, the second part is movably arranged on the support plate, the number of the driving elements is two, one driving element is connected with the first part, and the other driving element is connected with the second part, so that the second part can move relative to the first part.

4. The device for testing a battery cell according to claim 1, wherein,

the first portion is provided with a plurality of the placement grooves arranged in 2 rows and N columns, where N is an integer equal to or greater than 1;

the placement grooves in each column are arranged along a first direction, the placement grooves in each row are arranged along a second direction perpendicular to the first direction, and the first sides of the placement grooves in each row are aligned and are respectively provided with one first electrode;

each second part comprises N second electrodes, and the N second electrodes are arranged in one-to-one correspondence with the placing grooves of each row.

5. The device for testing a battery cell according to claim 1, wherein,

the placing groove extends along a first direction and is of a top open structure;

in a second direction perpendicular to the first direction, both sides of the placement groove are communicated with an operation space.

6. The device for testing a battery cell according to any one of claim 1 to 5, wherein,

the second portion includes a plate-like structure, and the driving element includes a main body portion and a power output portion connected to the first portion or the second portion and configured to move relative to the main body portion.

7. The device for testing a battery cell according to claim 6, wherein,

the driving element is a cylinder.

8. The cell testing device of any one of claims 1-5, further comprising:

a first direction movement assembly for providing a back and forth movement in a first direction;

the carrier component is used for placing the battery cell and is arranged on the first direction movement component so as to be driven to move by the first direction movement component;

a second direction movement assembly for providing a back and forth movement in a second direction perpendicular to the first direction;

the third direction movement assembly is arranged on the second direction movement assembly, is driven to move by the second direction movement assembly and is used for providing reciprocating movement along a third direction, and the third direction is perpendicular to the first direction and the second direction;

the clamping jaw assembly is arranged on the third-direction movement assembly, is driven to move by the third-direction movement assembly and is used for clamping and releasing the battery cell;

the first direction movement assembly is arranged to drive the carrier assembly to move to the feeding level, and the second direction movement assembly and the third direction movement assembly are arranged to drive the clamping jaw assembly to place the battery cell on the carrier assembly at the feeding level on the first part.

9. The device for testing a battery cell according to claim 8, wherein,

the second direction movement assembly and the third direction movement assembly are further arranged to drive the clamping jaw assembly to place the battery cell on the first portion on the carrier assembly at the loading level.

10. The device for testing a battery cell according to claim 8, wherein,

the number of the carrier components is two, and the carrier components are respectively arranged at two sides of the first part along the second movement direction.