CN220795420U - Test assembly and test device - Google Patents

Abstract

The application relates to the technical field of battery detection, in particular to a testing component and a testing device. Among above-mentioned test assembly and the testing arrangement, test assembly includes test piece and detection piece at least, is provided with the holding hole that runs through the first surface on the test piece, and the detection piece can be held in the holding hole. Through under test state for the detecting part holding is in the holding hole to joint in the utmost point post with first surface jointly, not only can carry out the test of battery monomer's charge and discharge through the testing piece with utmost point post butt, can also utilize the detecting part in the butt in utmost point post to carry out voltage sampling to battery monomer at the in-process of charge and discharge test. Because the detecting piece directly carries out voltage sampling on the pole, the accuracy of voltage sampling data can be improved, the charging and discharging test process can be controlled by more accurate voltage sampling data, and the accuracy of the charging and discharging test data is improved.

Description

Test assembly and test device

Technical Field

The application relates to the technical field of battery detection, in particular to a testing component and a testing device.

Background

Typically, the battery cells are subjected to charge and discharge tests to optimize the battery design and predict battery life and performance degradation based on the charge and discharge test data. However, in the above-described charge and discharge test, there is a problem in that the charge and discharge test data is inaccurate.

Disclosure of Invention

Based on this, it is necessary to provide a testing assembly and a testing device to improve the accuracy of the charge and discharge test data of the battery cells.

According to one aspect of the present application, embodiments provide a test assembly for a battery cell, the test assembly comprising:

the test piece is used for connecting with the charge and discharge test equipment; the test piece is provided with a first surface for abutting against the pole of the battery cell and a containing hole penetrating through the first surface; and

The detecting piece is used for sampling the voltage of the battery monomer; the detecting piece is configured to be accommodated in the accommodating hole;

the test assembly has a test state;

under the test state, the detection piece is located in the accommodating hole, and the first surface and the detection piece are abutted to the pole.

In one embodiment, the probe is configured to be movable in a first direction relative to the test piece, and the receiving hole is configured to be located on a movement path of the probe;

the first direction is perpendicular to the first surface.

In one embodiment, the test assembly also has an initial state;

in the initial state, at least part of the detecting member is positioned on one side of the first surface, which is away from the accommodating hole.

In one embodiment, the probe is configured to be movable in a first direction relative to the test piece in response to abutment of the pole during switching of the test assembly from the initial state to the test state.

In one embodiment, the test assembly further comprises an elastic member, and the detection member is elastically connected to the hole wall of the accommodating hole by means of the elastic member;

wherein the elastic member is configured to be elastically deformed when the probe member moves in a first direction relative to the test piece.

In one embodiment, the test assembly further comprises a first temperature sensing element;

wherein the first temperature detection piece is connected with the detection piece; alternatively, the first temperature detecting member is connected to the testing member.

According to another aspect of the present application, an embodiment of the present application provides a test device for a battery cell, the test device including:

the base is used for bearing the battery monomer; and

A plurality of test assemblies as in any above embodiments, the test member being connected to the base.

In one embodiment, the two poles of the battery cell are located on the same side; the plurality of test components includes at least one set of test components;

each group of test components comprises two test components arranged on the same side, wherein one test component is used for being abutted to the anode post of the battery cell, and the other test component is used for being abutted to the cathode post of the battery cell.

In one embodiment, two test pieces in each set of test assemblies are configured to be movably disposed on the base along a first predetermined direction;

The first preset direction and the direction of the positive electrode column pointing to the negative electrode column are parallel to each other.

In one embodiment, the test device further comprises an adjustment mechanism coupled to the base and the test piece;

the adjusting mechanism is configured to drive the test piece to reciprocate along a first direction, a second direction and a third direction relative to the base;

wherein the first direction is perpendicular to the first surface, and the first direction, the second direction and the third direction are perpendicular to each other.

In one embodiment, the adjustment mechanism comprises a first adjustment device, a second adjustment device, and a third adjustment device;

the first adjusting device is configured to be movably connected to the base along a first direction, the second adjusting device is configured to be movably connected to the first adjusting device along a second direction, the third adjusting device is configured to be movably connected to the second adjusting device along a third direction, and a test piece is arranged on the third adjusting device.

In one embodiment, the testing device further comprises an abutment member disposed on the base;

the abutting piece is used for abutting against the opposite side of one side of the battery cell, which is provided with the pole.

In one embodiment, the abutment member has an abutment surface for abutting against the battery cell;

The testing device further comprises a first pressure detection piece, wherein the first pressure detection piece is arranged on the abutting surface and is used for detecting the pressure of the battery cell abutting against the abutting piece.

In one embodiment, the testing device further comprises a clamping mechanism arranged on the base;

the clamping mechanism is configured to clamp the battery cell.

In one embodiment, the clamping mechanism is provided with a first clamping surface and a second clamping surface which are oppositely arranged along a second preset direction;

the testing device further comprises a second pressure detection piece, wherein the second pressure detection piece is arranged on one of the first clamping surface and the second clamping surface and is used for detecting expansion force generated in the charging and discharging process of the battery cell; and/or

The testing device further comprises a second temperature detection piece, and the second temperature detection piece is arranged on one of the first clamping surface and the second clamping surface;

the second preset direction is parallel to the first surface.

In one embodiment, the testing device further includes a third temperature detecting element, where the third temperature detecting element is configured to detect an ambient temperature of an environment where the battery cell is located; and/or

The testing device further comprises a protection mechanism, the protection mechanism is in transmission connection with the testing piece, and the protection mechanism is used for driving the testing piece to move in a direction away from the pole when the charge and discharge test is abnormal under the testing state, so that the testing piece and the detection piece are separated from the pole.

Among above-mentioned test assembly and the testing arrangement, test assembly includes test piece and detection piece at least, is provided with the holding hole that runs through the first surface on the test piece, and the detection piece can be held in the holding hole. Through under test state for the detecting part holding is in the holding hole to joint in the utmost point post with first surface jointly, not only can carry out the test of battery monomer's charge and discharge through the testing piece with utmost point post butt, can also utilize the detecting part in the butt in utmost point post to carry out voltage sampling to battery monomer at the in-process of charge and discharge test. Because the detecting piece directly carries out voltage sampling on the pole, the accuracy of voltage sampling data can be improved, the charging and discharging test process can be controlled by more accurate voltage sampling data, and the accuracy of the charging and discharging test data is improved.

Drawings

Fig. 1 is a schematic structural diagram of a battery cell according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a test assembly according to an embodiment of the present application.

Fig. 3 is a schematic cross-sectional view of the test assembly illustrated in fig. 2 in a measurement state.

Fig. 4 is a schematic cross-sectional view of the test assembly illustrated in fig. 2 in an initial state.

Fig. 5 is a schematic view of a part of the structure of the probe in the test assembly shown in fig. 2.

Fig. 6 is a schematic structural diagram of a testing device according to an embodiment of the present application.

Fig. 7 is a schematic structural view of a part of the structure of the test device illustrated in fig. 6 at a single viewing angle.

Fig. 8 is a schematic structural view of a part of the structure of the test device illustrated in fig. 6 at another view angle.

Fig. 9 is a schematic diagram of a structure in which a test assembly and an adjusting mechanism in the test apparatus shown in fig. 6 cooperate.

Fig. 10 is a schematic structural view of a first clamping member in the test apparatus shown in fig. 6.

Fig. 11 is a schematic view of a structure in which a battery cell is clamped on the test device illustrated in fig. 6.

Reference numerals illustrate:

a battery cell 10, an end cover 11, a housing 12, a pole 13, a positive pole 13a, a negative pole 13b;

a testing device 20;

the test assembly 100, the test piece 110, the first surface b, the accommodating hole k, the detecting piece 120 and the elastic piece 130;

a base 200, a guide d;

the device comprises an adjusting mechanism 300, a first adjusting device 310, a first adjusting seat 311, a first driving assembly 312, a first driving motor 312a, a first lead screw 312b, a second adjusting device 320, a second adjusting seat 321, a second driving assembly 322, a second driving motor 322a, a second lead screw 322b, a third adjusting device 330, a third driving assembly 332, a third driving motor 332a and a third lead screw 332b;

An abutting piece 400 abutting against the surface d;

clamping mechanism 500, first clamping assembly 510, first clamping member 511, first clamping face j 1, second clamping member 512, second clamping face j2, second clamping assembly 520, third clamping member 521, fourth clamping member 522, and baffle r;

the adjusting piece G, the guide groove G1, the insertion space X and the connecting component L are arranged in the cavity;

a first temperature detecting member t1, a second temperature detecting member t2, a third temperature detecting member t3, a first pressure detecting member p1, a second pressure detecting member p2;

the device comprises a first direction F1, a second direction F2, a third direction F3, a first preset direction Y1 and a second preset direction Y2.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., these terms refer to the orientation or positional relationship based on the drawings, which are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In this application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

For convenience in describing the test assembly provided in the embodiments of the present application, a test object will be described in an exemplary manner.

Fig. 1 is a schematic view showing the structure of a battery cell 10 according to an embodiment of the present application; for ease of illustration, only matters relevant to the embodiments of the present application are shown.

Referring to fig. 1, a test object of a test assembly 100 provided in an embodiment of the present application is a battery cell 10. The battery cell 10 refers to the smallest unit constituting the battery. Generally, the battery cell 10 includes an end cap 11, a case 12, an electrode assembly (not shown), and other functional components.

The end cap 11 refers to a member that is covered at the opening of the case 12 to isolate the internal environment of the battery cell 10 from the external environment. The end cover 11 is provided with a pole 13, and the pole 13 comprises a positive pole 13a and a negative pole 13b. The positive electrode tab 13a and the negative electrode tab 13b are used to connect the electrode assembly. The positive electrode post 13a and the negative electrode post 13b may be located on the same side or on different sides. Taking fig. 1 as an example, a case where the positive electrode post 13a and the negative electrode post 13b are located on the same side is illustrated.

The case 12 is an assembly for mating with the end cap 11 to form an internal environment of the battery cell 10, wherein the formed internal environment may be used to house an electrode assembly, an electrolyte (not shown in the drawings), and other components. The housing 12 and the end cap 11 may be separate members or may be an integral member. The housing 12 may be of various shapes and sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the case 12 may be determined according to the specific shape and size of the electrode assembly. Taking fig. 1 as an example, a case where the housing 12 has a rectangular parallelepiped shape is illustrated. The material of the housing 12 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiments of the present application.

FIG. 2 is a schematic diagram of a test assembly 100 according to an embodiment of the present application; FIG. 3 shows a schematic cross-sectional structure of the test assembly 100 illustrated in FIG. 2 in a measurement state; for ease of illustration, only matters relevant to the embodiments of the present application are shown.

Referring to fig. 2 and 3, and referring to fig. 1 in combination, a test assembly 100 is provided in an embodiment of the present application, and the test assembly 100 includes a test piece 110 and a probe piece 120.

The test piece 110 is used to connect a charge and discharge test device. The test piece 110 has a first surface b for abutting against the post 13 of the battery cell 10, and a receiving hole k penetrating the first surface b. The receiving hole k may be provided as a through hole penetrating the test piece 110, or may be provided as a blind hole penetrating only the first surface b. Taking fig. 3 as an example, the case where the receiving hole k is the receiving hole k penetrating only the first surface b is illustrated.

The probe 120 is used for voltage sampling of the battery cell 10. For example, probe 120 may be a probe. The probe 120 is configured to be received in the receiving hole k. That is, the probe 120 has a state of being accommodated in the accommodation hole k. Of course, other states of the probe 120 with respect to the receiving hole k may be set according to the use condition, which is not particularly limited herein.

The test assembly 100 has a test state. In the test state, the probe 120 is located in the accommodating hole k, and the first surface b and the probe 120 are abutted against the pole 13. That is, by configuring the accommodation hole k, the probe 120 can be located inside the test piece 110 and be abutted together with the test piece 110 to the pole 13. Since the probe 120 is located in the receiving hole k, the battery cell 10 can be charged and discharged by the test piece 110.

It will be appreciated that during the charge and discharge test, the voltage varies, and that voltage is the most important data for measuring the performance of the battery. Since there is a voltage drop in the loop formed during the test of the battery cell 10, that is, the voltages are not the same from place to place, it is difficult to control the process of the charge and discharge test by monitoring the voltages. In the embodiment of the present application, in the test state, since the probe 120 is abutted to the pole 13, the voltage at the pole 13 can be sampled by using the probe 120, so that the accuracy of the voltage sampling data can be improved. For example, after the voltage sampling data is obtained, whether the real-time voltage reaches the preset condition or not may be determined based on the voltage sampling data, so as to stop the charge and discharge test. The preset condition is set according to a specific use condition, and the embodiment of the present application does not particularly limit this.

From this, the test assembly 100 that provides in this application embodiment not only can carry out the charge and discharge test of battery monomer 10 through the test piece 110 with the 13 butt of utmost point post, can also utilize the probe 120 in the 13 butt of utmost point post to carry out voltage sampling to battery monomer 10 in the in-process of charge and discharge test, and then can improve voltage sampling data's accuracy to can control the charge and discharge test process through more accurate voltage sampling data, improve charge and discharge test data's accuracy.

In some embodiments, please continue with fig. 2 and 3, the probe 120 is configured to be able to move along the first direction F1 relative to the test piece 110, and the receiving hole k is configured to be located on the moving path of the probe 120. The first direction F1 is perpendicular to the first surface b.

In this way, the detecting member 120 is arranged to be movable relative to the test piece 110, so that the abutting force of the detecting member 120 when abutting against the pole 13 can be adjusted according to the use condition, the stability of the detecting member 120 is improved, the accuracy of voltage sampling is improved, and the surface of the pole 13 is protected.

FIG. 4 shows a schematic cross-sectional structure of the test assembly 100 illustrated in FIG. 2 in an initial state; for ease of illustration, only matters relevant to the embodiments of the present application are shown.

In some embodiments, please continue to refer to fig. 2 and 3, and refer to fig. 4, the test assembly 100 further has an initial state. In the initial state, at least part of the probe 120 is located on the side of the first surface b facing away from the receiving hole k. That is, when the test assembly 100 is switched from the initial state to the test state, the probe 120 may contact the pole 13 before the test piece 110, and then a displacement along the first direction F1 is generated by the probe 120 relative to the test piece 110, so that the first surfaces b of the probe 120 and the test piece 110 are both abutted against the pole 13. In this way, the position of the probe 120 is conveniently adjusted according to the actual use situation.

In some embodiments, referring to fig. 2 to 4, during the process of switching the test assembly 100 from the initial state to the test state, the probe 120 is configured to be able to move in the first direction F1 relative to the test piece 110 in response to the abutment of the pole 13. In this way, the probe 120 can be moved relative to the test piece 110 by an external force, which is more beneficial for switching the test assembly 100 to the test state. Of course, in other embodiments, a corresponding transmission mechanism may be provided to drive the probe 120 to act, which is not particularly limited in the embodiments of the present application.

In some embodiments, referring to fig. 2 to 4, the test assembly 100 further includes an elastic member 130, and the probe 120 is elastically connected to the wall of the accommodating hole k by means of the elastic member 130. Wherein the elastic member 130 is configured to be elastically deformed in a case where the probe 120 moves in the first direction F1 with respect to the test piece 110. For example, the elastic member 130 may be a spring, and may be sleeved outside the probe 120, and an abutment portion (not labeled in the drawing) may be correspondingly disposed on the probe 120, so that the elastic member 130 is connected between the probe 120 and the wall of the accommodating hole k.

In this way, the probe 120 can continuously abut against the pole 13 during the abutting against the pole 13 according to the elastic force of the elastic member 130. It is understood that the elastic force of the elastic member 130 may be set according to the requirement of use, which is not particularly limited in the embodiment of the present application.

FIG. 5 shows a schematic view of a portion of the probe 120 of the test assembly 100 illustrated in FIG. 2; for ease of illustration, only matters relevant to the embodiments of the present application are shown.

In some embodiments, please continue to refer to fig. 2-4, and refer to fig. 5, the testing assembly 100 further includes a first temperature detecting member t1. Wherein the first temperature detecting member t1 is connected to the detecting member 120; alternatively, the first temperature detecting member t1 is connected to the testing member 110. The first temperature detecting element t1 may be a thermocouple, specifically, a patch thermocouple, or a thermocouple with other structures such as a ring thermocouple. Taking fig. 5 as an example, a case where the first temperature detecting element t1 is a ring thermocouple and the first temperature detecting element t1 is sleeved outside the detecting element 120 is illustrated. Of course, in other embodiments, a receiving cavity may be provided on the measuring element, and the first temperature detecting element t1 is elastically connected to a cavity wall of the receiving cavity, and the first temperature detecting element t1 may directly contact the pole 13 in the testing state.

In this way, by providing the first temperature detecting member t1 to detect the temperature at the pole 13 or the area near the pole 13, the charge-discharge test process can be further controlled based on the temperature data.

FIG. 6 is a schematic diagram showing the structure of the test device 20 according to an embodiment of the present application; fig. 7 shows a schematic structural view of a part of the structure of the test device 20 illustrated in fig. 6 at a view angle; fig. 8 shows a schematic structural view of a part of the structure of the test device 20 illustrated in fig. 6 at another view angle; for ease of illustration, only matters relevant to the embodiments of the present application are shown.

Referring to fig. 6 to 8, the embodiment of the present application further provides a testing device 20, where the testing device 20 includes a base 200 and a plurality of testing assemblies 100 according to any of the above embodiments. The base 200 is used for carrying the battery cell 10, and the test piece 110 is connected to the base 200. The advantages of the above test assembly 100 are similar to those of the test device 20, and will not be described in detail herein.

It should be noted that the test device 20 may perform the test for one battery cell 10, or may perform the test for a plurality of battery cells 10. The number of the test assemblies 100 may be set according to the number of the battery cells 10. Accordingly, each battery cell 10 corresponds to two test assemblies 100. Taking fig. 6 to 8 as an example, a case in which the test device 20 performs a test for one battery cell 10 and the test assembly 100 is provided with two is illustrated. The required test device 20 can be correspondingly arranged according to the actual test situation, and is not limited in this way.

FIG. 9 shows a schematic diagram of the configuration of the test assembly 100 and the adjustment mechanism 300 of the test apparatus 20 shown in FIG. 6; for ease of illustration, only matters relevant to the embodiments of the present application are shown.

In some embodiments, please continue to refer to fig. 6 to 8 in combination with fig. 9, taking the battery cell 10 illustrated in fig. 1 as an example, two poles 13 of the battery cell 10 are located on the same side, and accordingly, the plurality of test assemblies 100 includes at least one set of test assemblies 100. Each set of test assemblies 100 includes two test assemblies 100 disposed on the same side, wherein one test assembly 100 is configured to abut against the positive electrode post 13a of the battery cell 10, and the other test assembly 100 is configured to abut against the negative electrode post 13b of the battery cell 10.

In this manner, the test assembly 100 may be flexibly arranged according to the specific configuration of the battery cell 10.

In some embodiments, referring to fig. 9, two test pieces 110 of each set of test assemblies 100 are configured to be movably disposed on the base 200 along the first predetermined direction Y1. The first preset direction Y1 and the direction in which the positive electrode post 13a points to the negative electrode post 13b are parallel to each other. In particular to some embodiments, taking fig. 9 as an example, the test piece 110 may be connected to the base 200 by means of an adjusting piece G. The adjusting member G may be provided with a guide structure extending along the first preset direction Y1, and the test piece 110 is movably disposed on the guide structure. The guide structure may be a guide groove G1 as illustrated in fig. 9 or a guide hole, which is not particularly limited in the embodiment of the present application.

Due to the different distances between the two poles 13 of the battery cells 10 of different sizes, the two test pieces 110 which can be close to each other or far from each other along the first preset direction Y1 are arranged, so that the test requirements of the battery cells 10 of different sizes can be conveniently adapted.

In some embodiments, referring to fig. 6, 7 and 9, the test apparatus 20 further includes an adjustment mechanism 300 coupled to the base 200 and the test piece 110. The adjusting mechanism 300 is configured to reciprocate the test piece 110 in the first direction F1, the second direction F2, and the third direction F3 relative to the base 200. Wherein the first direction F1 is perpendicular to the first surface b, and the first direction F1, the second direction F2 and the third direction F3 are perpendicular to each other.

Referring to fig. 1 in combination, the first direction F1 may be a 511 direction of the battery cell 10, the second direction F2 may be a length direction of the battery cell 10, and the third direction F3 may be a width direction of the battery cell 10. Accordingly, the first preset direction Y1 and the second direction F2 illustrated in the foregoing some embodiments may be parallel to each other.

Thus, by providing the adjusting mechanism 300, it is further convenient to adapt to the test requirements of the battery cells 10 of different sizes.

In particular to some embodiments, referring to fig. 6, 7 and 9, the adjustment mechanism 300 includes a first adjustment device 310, a second adjustment device 320 and a third adjustment device 330.

The first adjustment device 310 is configured to be movably coupled to the base 200 along a first direction F1. For example, the first adjusting device 310 may include a first adjusting seat 311 and a first driving assembly 312 drivingly connected to the first adjusting seat 311, and the base 200 is provided with a guide d extending along the first direction F1. The first adjustment seat 311 is movably coupled to the guide d. The guide d may be engaged with the first adjustment seat 311 through a clamping groove structure. The first driving assembly 312 is configured to drive the first adjustment seat 311 to reciprocate in the first direction F1. The first driving assembly 312 may include a first driving motor 312a disposed on the base 200 and a first screw 312b (refer to fig. 11, which will be illustrated later) connected to the first driving motor 312a, and the first screw 312b is threaded through and is engaged with the first adjustment seat 311. Of course, the first driving assembly 312 may also be other structures capable of driving the first adjusting seat 311 to reciprocate along the first direction F1, which is not limited in this embodiment.

The second adjusting means 320 is configured to be movably connected to the first adjusting means 310 in the second direction F2. The second adjusting device 320 may include a second adjusting seat 321 movably disposed on the first adjusting seat 311 along the second direction F2, and a second driving assembly 322 drivingly connected to the second adjusting seat 321. The second driving assembly 322 is configured to drive the second regulating seat 321 to reciprocate in the second direction F2. The second driving assembly 322 may include a second driving motor 322a disposed on the first adjusting seat 311 and a second screw 322b connected to the second driving motor 322a, and the second screw 322b is threaded through and is in threaded engagement with the second adjusting seat 321. Of course, the second driving assembly 322 may also be other structures capable of driving the second adjusting seat 321 to reciprocate along the second direction F2, which is not limited in particular in the embodiment of the present application.

The third adjusting device 330 is configured to be movably connected to the second adjusting device 320 along the third direction F3, and the test piece 110 is disposed on the third adjusting device 330. The third adjusting device 330 may include an adjusting member G (which may be combined with the adjusting member G illustrated in some of the foregoing embodiments) movably provided on the second adjusting seat 321 along the third direction F3, and a third driving assembly 332 drivingly connected to the adjusting member G. The regulating member G is provided with a test piece 110. The third driving assembly 332 is configured to drive the adjustment member G to reciprocate in the third direction F3. The third driving assembly 332 may include a third driving motor 332a and a third screw 332b connected to the third driving motor 332a, the third screw 332b being threaded and screw-fitted to the adjusting member G. Of course, the third driving assembly 332 may also be other structures that can drive the adjusting member G to reciprocate along the third direction F3, which is not limited in particular in the embodiment of the present application.

It should be understood that the embodiment illustrated by the first adjusting device 310, the second adjusting device 320, and the third adjusting device 330 is merely illustrative of related driving structures, and related matching structures may be added according to specific structures to facilitate driving when implementing.

In this manner, the adjustment of the adjustment mechanism 300 may be achieved by specifically configuring the relative structures of the first adjustment device 310, the second adjustment device 320, and the third adjustment device 330.

In some embodiments, referring to fig. 7 and 8, the testing device 20 further includes an abutment 400 disposed on the base 200. The abutment 400 is adapted to abut against a side opposite to the side of the battery cell 10 on which the pole 13 is provided. That is, the abutting piece 400 cooperates with the testing assembly 100 to form a limiting space for limiting the battery cell 10 along the first direction F1. In this way, the test assembly 100 is advantageously abutted against the post 13 of the battery cell 10 by means of the abutment 400.

In some embodiments, referring to fig. 7, the abutment 400 has an abutment surface d for abutting against the battery cell 10. The testing device 20 further includes a first pressure detecting member p1, where the first pressure detecting member p1 is disposed on the abutment surface d. That is, in the case where the battery cell 10 is abutted between the abutment 400 and the test assembly 100, the first pressure detecting member p1 may be used to detect the pressure at which the bottom of the battery cell 10 is in contact with the abutment 400. The first pressure detecting member p1 may be a film type pressure sensor, for example.

Therefore, the pressure can be used for adjusting the abutting force of the test assembly 100 abutting against the pole 13, which is beneficial to ensuring that the pole 13 contacts with the test assembly 100 well and improving the loosening situation.

In some embodiments, referring to fig. 6 to 8, the testing device 20 further includes a clamping mechanism 500 disposed on the base 200, and the clamping mechanism 500 is configured to clamp the battery cell 10. In this manner, the battery cell 10 may be secured by clamping to facilitate the testing process.

In some embodiments, please continue to refer to fig. 6 to 8, the clamping mechanism 500 has a first clamping surface j1 and a second clamping surface j2 disposed opposite along a second predetermined direction Y2. The second preset direction Y2 may be the width direction of the battery cell 10, i.e., the third direction F3 illustrated in the drawing. The second preset direction Y2 is parallel to the first surface b.

Further, referring to fig. 6 to 8, the clamping mechanism 500 includes a first clamping assembly 510 and a second clamping assembly 520. The first clamping assembly 510 includes a first clamping member 511 and a second clamping member 512 disposed opposite in a third direction F3. The first clamping member 511 and the second clamping member 512 may be detachably disposed on the base 200 by means of the connection assembly L, and the first clamping member 511 and the second clamping member 512 may adjust a distance between the first clamping member 511 and the second clamping member 512 in the third direction F3 by means of the connection assembly L. The first clamping surface j1 is a side surface of the first clamping member 511 facing the second clamping member 512, and the second clamping surface j2 is a side surface of the second clamping member 512 facing the first clamping member 511. The second clamping assembly 520 includes a third clamping member 521 and a fourth clamping member 522 disposed opposite in the second direction F2. The third clamping member 521 and the fourth clamping member 522 are elastically connected to the base 200 by means of the barrier r, respectively.

In this way, the first clamping assembly 510 can limit the battery cell 10 in the third direction F3, and the second clamping assembly 520 can limit the battery cell 10 in the second direction F2. Since the first clamping member 511 and the second clamping member 512 are adjustable in the distance in the third direction F3, the third clamping member 521 and the fourth clamping member 522 can be adjusted in the distance in the second direction F2 by means of elastic force, and can be better adapted to clamping and fixing of the battery cells 10 of different sizes.

In some embodiments, referring to fig. 6 to 8, the testing device 20 further includes a second pressure detecting member p2, where the second pressure detecting member p2 is disposed on one of the first clamping surface j1 and the second clamping surface j 2. Taking fig. 6 to 8 as an example, a case where the second pressure detecting member p2 is disposed on the second clamping surface j2 of the second clamping member 512 is illustrated. In the case where the second preset direction Y2 may be the width direction of the battery cell 10, the second pressure detecting member p2 may also be used to detect the pressure condition of a large surface (i.e., a surface disposed opposite along the width direction) of the battery cell 10, and may be used to characterize the expansion condition of the battery cell 10 accompanied with the charge and discharge test. That is, during the charge and discharge of the battery cell 10, the battery cell 10 generates an expansion force acting on the first clamping surface j1 and the second clamping surface j2, and the second pressure detecting member p2 may be used to detect the expansion force generated during the charge and discharge of the battery cell 20, and the second pressure detecting member p2 may be a film type pressure sensor, for example.

In this way, by providing the second pressure detecting member p2, the expansion condition of the battery cell 10 can be known by the pressure detected by the second pressure detecting member p 2.

Fig. 10 is a schematic structural view of a first clamping member 511 in the testing device 20 illustrated in fig. 6; for ease of illustration, only matters relevant to the embodiments of the present application are shown. In fig. 10, a schematic bottom view of the first clamping member 511 is shown with respect to fig. 6.

In other embodiments, referring to fig. 6, and referring to fig. 10 in combination, the testing device 20 further includes a second temperature detecting member t2, where the second temperature detecting member t2 is disposed on one of the first clamping surface j1 and the second clamping surface j 2. Taking fig. 10 as an example, the second temperature detecting element t2 is disposed on the first clamping surface j1 of the first clamping element 511. The second temperature sensing member t2 may be used to sense the temperature of the case 12 of the battery cell 10. The second temperature sensing element t2 may employ a spring-type contact thermocouple so as not to interfere with the clamping of the first clamping assembly 510 as much as possible.

In this way, by providing the second temperature detecting member t2, the temperature of the housing 12 of the battery cell 10 can be detected, which is beneficial to control the charge and discharge testing process of the battery cell 10.

In some embodiments, referring to fig. 6 to 8, the testing device 20 further includes a third temperature detecting member t3, where the third temperature detecting member t3 is configured to detect an ambient temperature of the environment where the battery cell 10 is located. For example, taking fig. 6 to 8 as an example, the third temperature detecting member t3 may be provided on the barrier r. The third temperature detecting member t3 may be a thermocouple.

Thus, by providing the third temperature detecting member t3, it is possible to monitor the ambient temperature in order to match the charge and discharge test of the battery cell 10.

In some embodiments, please continue to refer to fig. 6 to 8, the testing device 20 further includes a protection mechanism, the protection mechanism is in transmission connection with the testing piece 110, and the protection mechanism is used for driving the testing piece 110 to move away from the pole 13 when the charge and discharge test is abnormal in the testing state, so that the testing piece 110 and the detecting piece 120 are separated from the pole 13. The protection mechanism may be an adjustment mechanism 300 as illustrated in some of the foregoing embodiments, which is capable of moving the test assembly 100. Thus, by providing the protection mechanism, the safety performance can be improved.

In particular, in some embodiments, in combination with what is illustrated in some of the foregoing embodiments, the testing device 20 may further include a host computer electrically connected to the first temperature detecting member t1, the second temperature detecting member t2, the third temperature detecting member t3, the first pressure detecting member p1, the second pressure detecting member p2, and the adjusting mechanism 300. The upper computer is used for controlling the action of the adjusting mechanism 300 according to the detection information of the first temperature detecting element t1, the second temperature detecting element t2, the third temperature detecting element t3, the first pressure detecting element p1 and the second pressure detecting element p 2. For example, when the charge and discharge test data is abnormal (for example, the corresponding temperature is too high, or the corresponding pressure is abnormally increased to reach a critical value), the upper computer can send an alarm to control the adjusting mechanism 300 to act, so that the test assembly 100 is separated from the pole 13 of the battery cell 10, the charge and discharge test is stopped, and the test device 20 and the operator are protected.

In the following, with reference to the situations illustrated in some of the above embodiments and the related drawings, taking the battery cell 10 as a square cell as an example, an exemplary use of the test device 20 provided in the embodiments of the present application will be described.

Fig. 11 is a schematic view showing a structure in which the battery cell 10 is held on the test device 20 shown in fig. 6; for ease of illustration, only matters relevant to the embodiments of the present application are shown.

Referring to fig. 6 to 10 in combination with fig. 11, first, the battery cell 10 is placed in the testing device 20. Specifically, the operator removes the first clamping member 511 by means of the connection assembly L, places the battery cell 10 on the second clamping surface j2 of the second clamping member 512, fixes the battery cell 10 in the second direction F2 by the second clamping assembly 520, and then installs the first clamping member 511 by means of the connection assembly L. When the first clamping member 511 is installed to generate a clamping force in the third direction F3 to the battery cell 10, a desired clamping force can be controlled by the detected pressure of the second pressure detecting member p 2. Next, the test assembly 100 is aligned and abutted against the post 13 of the battery cell 10 by the adjustment mechanism 300. Finally, one end of the charge-discharge power line is connected with the test piece 110 through the insertion space X (the insertion space X may be disposed on one side of the adjusting piece G away from the test assembly 100), and the other end is connected with the charge-discharge test device, so as to start the charge-discharge test on the battery cell 10.

In the process of performing the charge and discharge test on the battery cell 10, the battery cell 10 is voltage-sampled by the detecting member 120, the battery cell 10 is temperature-sampled by the first temperature detecting member t1, the second temperature detecting member t2 and the third temperature detecting member t3, and the battery cell 10 is pressure-sampled by the first pressure detecting member p1 and the second pressure detecting member. And monitoring the voltage sampled data, the temperature sampled data and the pressure sampled data by using the upper computer. When an abnormality occurs, the upper computer sends out alarm information and controls the adjusting mechanism 300 to act, so that the test assembly 100 is separated from the pole 13 of the battery cell 10, and the charge and discharge test is stopped.

In summary, by arranging the test piece 110 abutting against the pole 13 of the battery cell 10, the embodiment of the present disclosure can obtain a contact effect more beneficial to testing, and improve the situation that long-period testing cannot be performed, compared with the manner in which the test piece 110 and the pole 13 are elastically connected. By arranging the detecting piece 120 matched with the test piece 110, voltage sampling is directly carried out at the pole 13, so that the contact resistance between the detecting piece and the battery cell 10 can be reduced, and the accuracy of test data can be improved. By providing the first temperature detecting member t1, the second temperature detecting member t2, the third temperature detecting member t3, the first pressure detecting member p1, and the second pressure detecting member p2 at the corresponding positions, it is possible to monitor important parameters of the battery cell 10 other than the electrical properties. By providing an adjustable test assembly 100, clamping mechanism 500 and adjustment mechanism 300, it is possible to better adapt to different sizes of battery cells 10, improving the versatility of the test device 20. Therefore, the components are matched with each other, so that the device is convenient to operate, the contact stability of the battery cell 10 in the test process is improved, the accuracy of test data can be improved by monitoring the related temperature and pressure, and more perfect test data can be provided for the design of the battery cell 10. Compared with the condition that only the noble charge-discharge current voltage can be monitored in the related art, the embodiment of the application can monitor more data and provide more test data. In addition, under the condition of monitoring the corresponding temperature and pressure, the physical isolation process between the test assembly 100 and the pole 13 is realized by controlling the action of the regulating mechanism 300, so that the safety performance is improved.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims (16)

1. A test assembly for a battery cell, the test assembly comprising:

the test piece is used for connecting with the charge and discharge test equipment; the test piece is provided with a first surface for abutting against the pole of the battery cell and a containing hole penetrating through the first surface; and

The detection piece is used for sampling the voltage of the battery cell; the detecting piece is configured to be accommodated in the accommodating hole;

Wherein the test assembly has a test state;

in the test state, the detection piece is positioned in the accommodating hole, and the first surface and the detection piece are abutted to the pole.

2. The test assembly of claim 1, wherein the probe is configured to be movable in a first direction relative to the test piece, and the receiving aperture is configured to be positioned in a path of movement of the probe;

the first direction is perpendicular to the first surface.

3. The test assembly of claim 2, wherein the test assembly further has an initial state;

in the initial state, at least part of the detecting piece is positioned on one side of the first surface, which is away from the accommodating hole.

4. A test assembly according to claim 3, wherein the probe is configured to be movable in the first direction relative to the test piece in response to abutment of the pole during switching of the test assembly from the initial state to the test state.

5. The test assembly of claim 4, further comprising a resilient member by which the probe member is resiliently connected to the wall of the receiving hole;

Wherein the resilient member is configured to be elastically deformable upon movement of the probe member relative to the test member in the first direction.

6. The test assembly of any one of claims 1-5, further comprising a first temperature sensing element;

wherein the first temperature detecting member is connected to the detecting member; alternatively, the first temperature detecting member is connected to the test member.

7. A test device for a battery cell, the test device comprising:

the base is used for bearing the battery cells; and

A plurality of test assemblies as claimed in any one of claims 1 to 6, said test members being connected to said base.

8. The test device of claim 7, wherein two poles of the battery cells are on the same side; the plurality of test components includes at least one set of test components;

each group of test assemblies comprises two test assemblies arranged on the same side, wherein one test assembly is used for being abutted to the positive electrode column of the battery cell, and the other test assembly is used for being abutted to the negative electrode column of the battery cell.

9. The test device of claim 8, wherein two of the test pieces in each set of the test assemblies are configured to be movably disposed on the base in a first predetermined direction;

the first preset direction and the direction of the positive electrode column pointing to the negative electrode column are parallel to each other.

10. The test device of any one of claims 7-9, further comprising an adjustment mechanism coupled to the base and the test piece;

the adjusting mechanism is configured to drive the test piece to reciprocate along a first direction, a second direction and a third direction relative to the base;

wherein the first direction is perpendicular to the first surface, and the first direction, the second direction, and the third direction are perpendicular to each other.

11. The test device of claim 10, wherein the adjustment mechanism comprises a first adjustment device, a second adjustment device, and a third adjustment device;

the first adjusting device is configured to be movably connected to the base along the first direction, the second adjusting device is configured to be movably connected to the first adjusting device along the second direction, the third adjusting device is configured to be movably connected to the second adjusting device along the third direction, and the test piece is arranged on the third adjusting device.

12. The test device of any one of claims 7-9, further comprising an abutment provided to the base;

the abutting piece is used for abutting against the opposite side of one side of the battery cell, on which the pole is arranged.

13. The test device of claim 12, wherein the abutment has an abutment surface for abutting the battery cell;

the testing device further comprises a first pressure detection piece, wherein the first pressure detection piece is arranged on the abutting surface and is used for detecting the pressure of the battery cell abutting against the abutting piece.

14. The test device of any one of claims 7-9, further comprising a clamping mechanism provided to the base;

the clamping mechanism is configured to clamp the battery cell.

15. The test device of claim 14, wherein the clamping mechanism has a first clamping surface and a second clamping surface disposed opposite one another along a second predetermined direction;

the testing device further comprises a second pressure detection piece, wherein the second pressure detection piece is arranged on one of the first clamping surface and the second clamping surface and is used for detecting expansion force generated in the process of charging and discharging the battery cell; and/or

The testing device further comprises a second temperature detection piece, wherein the second temperature detection piece is arranged on one of the first clamping surface and the second clamping surface;

the second preset direction is parallel to the first surface.

16. The test device of any one of claims 7-9, further comprising a third temperature sensing member for sensing an ambient temperature of an environment in which the battery cell is located; and/or

The testing device further comprises a protection mechanism, the protection mechanism is in transmission connection with the testing piece, and the protection mechanism is used for driving the testing piece to move in a direction away from the pole when the charge and discharge test is abnormal under the testing state, so that the testing piece and the detection piece are separated from the pole.