CN220064125U - Bearing mechanism, battery cell testing device and battery production system - Google Patents

Abstract

The utility model relates to a bearing mechanism, an electric core testing device and a battery production system, wherein the bearing mechanism comprises: a base; the mobile assembly is assembled on the base and used for driving the battery cell tray to move along a first direction; and the stop piece is arranged at one end of the base along the first direction and used for limiting the movement stroke of the battery cell tray on the base along the first direction. The moving assembly can drive the battery cell tray to move on the base along the first direction, the stop piece can limit the movement stroke of the battery cell tray along the first direction, and the battery cell tray is abutted against the stop piece, so that the positioning of the battery cell tray on the base is realized, the position of the battery cell tray on the bearing mechanism is more flexible, the stop piece is matched with the moving assembly, the quick positioning of the battery cell tray on the bearing mechanism is realized, the battery cell tray can be electrically connected with an external testing device more quickly and accurately, and the operation process is simpler and more convenient.

Description

Bearing mechanism, battery cell testing device and battery production system

Cross reference

The present utility model refers to chinese patent application No. 202320071459.5 entitled "battery tray, test system for batteries" filed on 1 month 10 of 2023, which is incorporated herein by reference in its entirety.

Technical Field

The present utility model relates to the field of battery testing technologies, and in particular, to a bearing mechanism, a battery core testing device, and a battery production system.

Background

In the research and development process of the battery, the battery core needs to be tested, and the battery core can be put into production after each performance test is qualified. Therefore, the testing process of the battery cells is particularly important in the whole production process of the battery.

When the battery cell is tested, the battery cell to be tested needs to be carried through the battery cell tray, and the battery cell tray and the battery cell are placed on the carrying mechanism together, so that the electric connection between the battery cell to be tested and the external testing device is realized through the battery cell tray.

However, the position of the cell tray on the carrying mechanism will affect the distance between the cell tray and the external test device, thereby affecting the stability of the electrical connection between the cell tray and the external test device.

Based on this, when current electric core tray is placed on bearing mechanism, be inconvenient for realizing the electricity with external testing arrangement between being connected, the operation process is comparatively complicated.

Disclosure of Invention

Based on this, it is necessary to provide a carrying mechanism, a battery cell testing device and a battery production system, which are necessary to solve the problems that the current battery cell tray is inconvenient to realize electrical connection with an external testing device and the operation process is complicated when being placed on the carrying mechanism.

A bearing mechanism for bearing a battery cell tray, the bearing mechanism comprising:

a base;

the mobile assembly is assembled on the base and used for driving the battery cell tray to move along a first direction; a kind of electronic device with high-pressure air-conditioning system

The stop piece is arranged at one end of the base along the first direction and used for limiting the movement stroke of the battery cell tray on the base along the first direction.

Through the structure, the mobile assembly can drive the battery cell tray to move along the first direction, and the stop piece blocks the battery cell tray in the first direction in the moving process of the battery cell tray, so that the battery cell tray can be quickly positioned at a position propping against the stop piece, and the battery cell tray is electrically connected with an external testing device at the position. From this, the position adjustment of electric core tray on bearing mechanism can be more nimble under moving assembly's drive to stop the electric core tray through the backstop piece, thereby carry out quick location to the position of electric core tray on the base, make electric core tray can be quick accurately with the outside between the testing arrangement realize electric connection, the operation of being convenient for more.

In some embodiments, the moving assembly includes a rolling member movably disposed on the base for supporting the battery cell tray and moving the battery cell tray in the first direction.

Through set up the rolling element on the base, can drive the relative base of electric core tray along first direction and remove to the position of adjustment electric core tray on the base of being convenient for more makes electric core tray can conveniently realize the electricity with outside testing arrangement and be connected.

In some embodiments, the rolling element comprises at least two sets of balls spaced apart along the second direction, each set of balls comprising a plurality of balls spaced apart along the first direction;

wherein the second direction intersects the first direction.

Through set up the ball on the base for remove the structure of subassembly simpler, simultaneously, can drive battery cell tray smoothly and remove along the relative base of first direction, thereby adjust the position of battery cell tray on the base fast.

In some embodiments, the bearing mechanism further includes a first limiting member and a second limiting member disposed on the base, where the first limiting member and the second limiting member are located on opposite sides of the whole ball group along the second direction and limit the battery cell tray along the second direction.

Through setting up first locating part and second locating part, can make the position of electric core tray on the base more stable, reduce the probability that electric core tray takes place the position offset on the base to be convenient for more quick more accurately realize electric connection between electric core tray and the outside testing arrangement.

In some embodiments, at least one of the first limiting member and the second limiting member includes a main body portion and a first guiding portion, the main body portion being connected between the first guiding portion and the base;

the main body part is used for limiting the battery cell tray along the second direction, and a guide surface which inclines towards the base with a downward gradient is formed on the first guide part.

Through setting up first guiding part, can be in the in-process that the electric core tray placed on the base, play the guide effect to the electric core tray through the guide on the first guiding part for the electric core tray can be placed on the base more fast more accurately. And through setting up main part, when the battery cell tray is located the base, carry out spacingly to the battery cell tray along the second direction to make the setting of battery cell tray on the base more stable.

In some embodiments, the base has a bearing surface for bearing the cell tray, the bearing surface and the guide surface having an included angle in the range of 25 ° -60 °. Therefore, in the process of placing the battery cell tray on the base, the guide surface smoothly plays a guide role on the battery cell tray, so that the battery cell tray can be placed on the base faster and more accurately.

In some embodiments, the angle between the bearing surface and the guide surface ranges from 30 ° to 40 °. This can further enhance the effect of the guide surface on the guide action of the cell tray.

In some embodiments, the first limiting member, the second limiting member, the stopping member and the base form a containing position for containing the battery cell tray in a surrounding manner, and a ventilation opening is formed in the bottom of the containing position in a penetrating manner.

Through setting up the vent, can realize the heat dissipation of electric core in the test process, the temperature of rational control electric core test in-process for electric core keeps good state in the test process, improves the accuracy of test result.

In a second aspect, the present utility model provides a battery cell testing device, including a battery cell tray and a bearing mechanism as described above, where the battery cell tray is used for placing a battery cell to be tested, and the bearing mechanism is used for accommodating the battery cell tray.

In a third aspect, the present utility model provides a battery production system comprising a cell testing device as described above.

Above-mentioned loading attachment, electric core testing arrangement and battery production system, when electric core tray placed on loading attachment, remove the subassembly and can realize driving electric core tray and remove on the base along first direction, simultaneously, the stopper can be along the motion stroke of first direction restriction electric core tray, make electric core tray support and lean on the stopper, thereby realize the location of electric core tray on the base, from this, make the position adjustment of electric core tray on loading attachment more nimble, and cooperate with the removal subassembly through the stopper, realize the quick location of electric core tray on loading attachment, make electric core tray can be faster more accurate and outside test device between realize the electricity and be connected, the operation process is simpler and more convenient.

Drawings

FIG. 1 is a schematic view of a load-bearing mechanism in one or more embodiments.

Fig. 2 is a top view of a carrier mechanism in one or more embodiments.

FIG. 3 is a side view of a load bearing mechanism in one or more embodiments.

Reference numerals illustrate: 100. a carrying mechanism; 10. a base; 20. a moving assembly; 30. a stopper; 40. a first limiting member; 50. a second limiting piece; 60. rong Zhiwei; 11. a bearing surface; 12. a vent; 21. a rolling member; 41. a main body portion; 42. a first guide part; 211. a ball; 421. a guide surface; a. a first direction; b. a second direction.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being 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 utility model.

Furthermore, the terms "first," "second," and the like, 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 utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; 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 above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via 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 when 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. When 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 are used herein for illustrative purposes only and are not meant to be the only embodiment.

Currently, the application of power batteries is more widespread from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles and other fields. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding.

In the research and development process of the battery, the battery core needs to be tested, and after each performance test of the battery core is qualified, the battery core can be put into production, so that the battery is formed. In the testing process, in order to improve efficiency, the cells with different specifications need to be tested simultaneously. Therefore, the electric cores with different specifications are required to be fixed on the electric core tray, and then the electric connection between each electric core and the external testing device is uniformly realized through the electric core tray.

Further, in order to improve stability of the testing process, the battery cell tray needs to be placed on the bearing mechanism, so that the battery cell tray is kept stable in the testing process, and accuracy of the testing result is improved.

After the cell tray is placed on the carrying mechanism, it is necessary to achieve electrical connection between the cell tray and the external test device. However, since the connection harness between the cell tray and the external test device is generally fixed, it is necessary to adjust the position of the cell tray on the carrying mechanism so that the cell tray can be stably connected to the external test device.

However, at present, after the electric core tray is placed on the bearing mechanism, the position of the electric core tray is inconvenient to adjust, so that the efficiency of a connection process between the electric core tray and an external testing device is low, the operation process is complex, and the efficiency of the testing process is not improved.

Based on the above considerations, in order to solve the problem that when the current battery cell tray is placed on the bearing mechanism, electrical connection with an external testing device is inconvenient, and the operation process is relatively complex, one or more embodiments of the present utility model provide a bearing mechanism, when the battery cell tray is placed on the bearing mechanism, the moving component can drive the battery cell tray to move on the base along the first direction, and meanwhile, the stop piece can limit the movement stroke of the battery cell tray along the first direction, so that the battery cell tray abuts against the stop piece, thereby realizing positioning of the battery cell tray on the base. Therefore, the position of the battery cell tray on the bearing mechanism is adjusted more flexibly, the battery cell tray is rapidly positioned on the bearing mechanism through the cooperation of the stop piece and the moving assembly, the battery cell tray can be electrically connected with an external testing device more rapidly and accurately, and the operation process is simpler and more convenient.

Referring to fig. 1, an embodiment of the present utility model provides a carrying mechanism 100 for carrying a battery cell tray, where the carrying mechanism 100 includes a base 10, a moving assembly 20, and a stopper 30. Wherein, the moving assembly 20 is assembled on the base 10 for driving the battery tray to move along the first direction a. The stopper 30 is disposed at one end of the base 10 along the first direction a, and is used for limiting the movement travel of the battery cell tray on the base 10 along the first direction a.

It should be noted that the battery cell tray refers to a structure for placing and fixing a battery cell to be tested and realizing electrical connection between the battery cell to be tested and an external testing device. The carrying mechanism 100 is a structure for carrying the battery cell tray so as to make the connection between the battery cell tray and the external testing device more stable.

Further, a connecting terminal and a connecting wire harness are arranged on the battery cell tray, wherein the connecting terminal can be connected with the battery cell, and the connecting wire harness can be connected with an external testing device, so that the electric connection between the battery cell and the external testing device is realized through the battery cell tray, and various data of the battery cell can be collected and tested conveniently.

When the carrying mechanism 100 is used for carrying the battery cell tray, the battery cell tray is placed on the base 10 of the carrying mechanism 100 and can be driven by the moving assembly 20 to move along the first direction a. When the cell tray moves to abut against the stop member 30, the position of the cell tray can be positioned, that is, the movement of the cell tray is stopped, and the cell tray is stopped at the position abutting against the stop member 30.

At this time, the connection harness on the battery cell tray is led out, and the battery cell tray is electrically connected with the external testing device through the connection harness, so that stable connection between the battery cell tray and the external testing device can be realized.

Specifically, when the battery cell tray is carried on the base 10, the battery cell tray can be driven to move along the first direction a by the moving component 20 under the action of external force, for example, the battery cell tray can be driven to move along the first direction a by manually pushing the battery cell tray. The movement of the cell tray against the stop 30 stops, i.e. the cell tray is positioned against the stop 30. The position can be convenient for the electric connection between the battery cell tray and the external testing device, thereby improving the connection efficiency between the battery cell tray and the external testing device.

Through the structure, the moving assembly 20 can drive the battery cell tray to move along the first direction a, and the stop piece 30 stops the battery cell tray in the first direction a in the moving process of the battery cell tray, so that the battery cell tray can be quickly positioned at a position propped against the stop piece 30, and the battery cell tray is electrically connected with an external testing device at the position. Therefore, the position adjustment of the battery cell tray on the bearing mechanism 100 can be more flexible under the drive of the moving assembly 20, and the battery cell tray is blocked by the stop piece 30, so that the position of the battery cell tray on the base 10 is rapidly positioned, the battery cell tray can be rapidly and accurately electrically connected with an external testing device, and the operation is more convenient.

In some embodiments, the moving assembly 20 includes a rolling member 21 movably disposed on the base 10, where the rolling member 21 is used to support the battery cell tray and drive the battery cell tray to move along the first direction a.

Specifically, the rolling element 21 is a structure that is rollably disposed on the base 10 and is capable of driving the battery cell tray disposed on the base 10 to move along the first direction a relative to the base 10.

When the cell tray is placed on the base 10, the cell tray is simultaneously supported on the rolling member 21. Therefore, the rolling element 21 can drive the battery cell tray to move relative to the base 10 along the first direction a under the action of external force, so that the position adjustment of the battery cell tray on the base 10 is realized.

Through set up rolling element 21 on base 10, can drive the battery cell tray and remove relative base 10 along first direction a to the position of adjustment battery cell tray on base 10 of being convenient for more makes the battery cell tray can conveniently realize the electricity with outside testing arrangement and be connected.

Referring to fig. 1 and 2 together, in some embodiments, the rolling member 21 includes at least two ball sets spaced apart along the second direction b, and each ball set includes a plurality of balls 211 spaced apart along the first direction a. Wherein the second direction b intersects the first direction a.

Specifically, the first direction a and the second direction b are disposed perpendicular to each other, i.e., the first direction a is set as the longitudinal direction of the chassis 10, and the second direction b is set as the width direction of the chassis 10.

At least two ball groups are disposed at intervals along the second direction b, and each ball group includes a plurality of balls 211 disposed at intervals along the first direction a. Therefore, when the battery cell tray is supported on the base 10, the battery cell tray can be more uniformly supported on each ball 211 by stress, so that each ball 211 can smoothly drive the battery cell tray to move.

Further, all the balls 211 are arranged in a rectangular array, so that the battery cell tray is more flatly supported on each ball 211, and the stress on each position on the battery cell tray is more uniform.

By providing the balls 211 on the base 10, the structure of the moving assembly 20 is simpler, and at the same time, the battery cell tray can be smoothly driven to move along the first direction a relative to the base 10, so that the position of the battery cell tray on the base 10 can be quickly adjusted.

In some embodiments, the carrying mechanism 100 further includes a first limiting member 40 and a second limiting member 50 disposed on the base 10, where the first limiting member 40 and the second limiting member 50 are located on opposite sides of the whole ball group along the second direction b, and limit the battery tray along the second direction b.

The first limiting piece 40 and the second limiting piece 50 can limit the battery cell tray along the second direction b, so that the movement stroke of the battery cell tray on the base 10 along the second direction b is limited, and the probability of the position deviation of the battery cell tray on the base 10 is reduced.

Therefore, by arranging the first limiting piece 40 and the second limiting piece 50, the position of the battery cell tray on the base 10 can be more stable, the probability of position deviation of the battery cell tray on the base 10 is reduced, and the electric connection between the battery cell tray and an external testing device can be realized more quickly and accurately.

Referring to fig. 1 and 3 together, in some embodiments, at least one of the first limiting member 40 and the second limiting member 50 includes a main body portion 41 and a first guiding portion 42, and the main body portion 41 is connected between the first guiding portion 42 and the base 10. The main body 41 is used for limiting the battery cell tray along the second direction b, and the first guiding portion 42 is formed with a guiding surface 421 inclined toward the base 10 with a downward gradient.

Specifically, the main body 41 can limit the battery cell tray along the second direction b, that is, the battery cell tray can abut against the main body 41 in the second direction b, so that the movement stroke of the battery cell tray in the second direction b is limited by the main body 41.

Further, when the battery cell tray is placed on the base 10, the guiding surface 421 on the first guiding portion 42 can play a guiding role on the battery cell tray, so that the battery cell tray can be more accurately placed on the base 10 along the guiding surface 421. When the battery cell tray is placed on the base 10, the main body 41 limits the battery cell tray along the second direction b, so that the probability of the position deviation of the battery cell tray on the base 10 can be reduced.

The first limiting member 40 and the second limiting member 50 may each include a main body portion 41 and a first guiding portion 42, so that when the battery cell tray is placed on the base 10, the first guiding portion 42 on the first limiting member 40 and the first guiding portion 42 on the second limiting member 50 can guide the battery cell tray at the same time, thereby enabling the battery cell tray to be placed on the base 10 more accurately. At the same time, the main body 41 of the first limiting member 40 and the main body 41 of the second limiting member 50 can limit the position of the battery cell tray along the second direction b at the same time, so that the battery cell tray can be more quickly positioned on the base 10.

Of course, only one of the first stopper 40 and the second stopper 50 may include the main body 41 and the first guide 42, for example, the first stopper 40 may include the main body 41 and the first guide 42, or the second stopper 50 may include the main body 41 and the first guide 42. Therefore, when the battery cell tray is placed on the base 10, the first guide portion 42 on the first limiting member 40 or the second limiting member 50 can play a role in guiding one side of the battery cell tray, and also can enable the battery cell tray to be accurately placed on the base 10. At the same time, the main body 41 of the first limiting member 40 or the second limiting member 50 limits the cell tray along the second direction b, so that the cell tray is stably placed on the base 10.

Through setting up first guide part 42, can be at the in-process that the battery cell tray placed on base 10, play the guide effect to the battery cell tray through the guide surface 421 on the first guide part 42 for the battery cell tray can be placed on base 10 more fast more accurately. By arranging the main body 41, when the battery cell tray is positioned on the base 10, the battery cell tray is limited along the second direction b, so that the battery cell tray is more stably arranged on the base 10.

In some embodiments, the base 10 has a bearing surface 11 for a user to carry the cell tray, and the angle Θ between the bearing surface 11 and the guide surface 421 is in the range of 25 ° -60 °.

Too large or too small the above-mentioned angle range may lead to poor guiding effect of the guiding surface 421 on the battery cell tray when the battery cell tray is placed on the base 10. Therefore, setting the above-mentioned angle Θ to be 25 ° -60 ° can make the guiding surface 421 smoothly guide the cell tray in the process of placing the cell tray on the base 10, so that the cell tray can be placed on the base 10 more quickly and accurately.

In some embodiments, the angle Θ between the bearing surface 11 and the leading surface 421 ranges from 30 ° to 40 °. As a preferred embodiment, setting the angle Θ between the bearing surface 11 and the guide surface 421 to be 30 ° -40 °, the effect of the guide surface 421 on the guiding action of the cell tray can be further improved.

In some embodiments, the angle Θ between the bearing surface 11 and the leading surface 421 is 35 °. Through multiple experiments, when the included angle theta between the bearing surface 11 and the guide surface 421 is set to 35 degrees, the guide surface 421 can better guide the battery cell tray in the process of placing the battery cell tray on the base 10, so that the battery cell tray can be rapidly and accurately placed on the base 10.

In some embodiments, the first limiting member 40, the second limiting member 50, the stop member 30 and the base 10 are enclosed together to form a containing position 60 for containing the battery cell tray, and the bottom of the containing position 60 is provided with a ventilation opening 12.

When the battery cell tray is located in the accommodating position 60, the battery cell tray is electrically connected with an external testing device, so that various performance tests can be performed on the battery cells on the battery cell tray, wherein the performance tests can comprise performance tests on the internal resistance, voltage, pressure and the like of the battery cells.

With the progress of the test process, electrochemical reaction occurs inside the battery cell, so that the temperature of the battery cell can be gradually increased. Therefore, in order to better control the temperature of the battery cell, the battery cell is cooled, the vent 12 is formed at the bottom of the accommodating position 60 in a penetrating way, and the vent 12 can realize the circulation of air flow, so that the battery cell is cooled, and the temperature in the battery cell testing process is reasonably controlled.

Therefore, through the ventilation opening 12, heat dissipation of the battery cell in the test process can be realized, the temperature of the battery cell in the test process is reasonably controlled, the battery cell is kept in a good state in the test process, and the accuracy of the test result is improved.

Based on the same concept as the bearing mechanism 100, the utility model also provides a battery cell testing device, which comprises a battery cell tray and the bearing mechanism 100, wherein the battery cell tray is used for placing a battery cell to be tested, and the bearing mechanism 100 is used for accommodating the battery cell tray.

Based on the same conception as the battery cell testing device, the utility model also provides a battery production system which comprises the battery cell testing device.

According to one or more embodiments, when testing the battery cells, the battery cells are first placed on a battery cell tray and fixed, and the battery cells are connected with connection terminals on the battery cell tray.

Then, the battery cell tray and the battery cells are placed on the base 10 together, and the guiding surface 421 can play a guiding role in the process of placing the battery cell tray, so that the battery cell tray can be placed on the base 10 more quickly and accurately.

After the battery cell tray is placed on the base 10, the main body portion 41 limits the battery cell tray along the second direction b, so that the position of the battery cell tray on the base 10 is more stable.

Further, the battery cell tray is driven to move along the first direction a by the balls 211 until the battery cell tray abuts against the stop member 30 under the action of external force, and the battery cell tray is positioned at a position abutting against the stop member 30. The connection wire harness on the battery cell tray is electrically connected with an external testing device, so that the battery cell can be tested.

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 illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. A carrier mechanism for carrying a cell tray, the carrier mechanism comprising:

a base;

the moving assembly is assembled on the base and used for driving the battery cell tray to move along a first direction; a kind of electronic device with high-pressure air-conditioning system

And the stop piece is arranged at one end of the base along the first direction and used for limiting the movement stroke of the battery cell tray on the base along the first direction.

2. The carrier of claim 1, wherein the moving assembly comprises a rolling member movably disposed on the base, the rolling member being configured to support the cell tray and move the cell tray in the first direction.

3. The load bearing mechanism of claim 2, wherein the rolling elements comprise at least two sets of balls spaced apart along a second direction, each set of balls comprising a plurality of balls spaced apart along the first direction;

wherein the second direction intersects the first direction.

4. The carrier of claim 3, further comprising a first stop member and a second stop member disposed on the base, the first stop member and the second stop member being disposed on opposite sides of all of the ball sets along the second direction and limiting the battery cell tray along the second direction.

5. The load bearing mechanism of claim 4, wherein at least one of the first and second stop members comprises a body portion and a first guide portion, the body portion being connected between the first guide portion and the base;

the main body part is used for limiting the battery cell tray along the second direction, and a guide surface which is inclined towards the base with a downward gradient is formed on the first guide part.

6. The carrier mechanism of claim 5, wherein the base has a carrier surface for carrying the cell tray, the carrier surface having an angle with the guide surface in the range of 25 ° -60 °.

7. The carrier according to claim 6, wherein the angle between the carrier surface and the guide surface is in the range of 30 ° -40 °.

8. The carrying mechanism of claim 4, wherein the first limiting member, the second limiting member, the stop member and the base are enclosed together to form a holding position for holding the battery cell tray, and a vent is formed in the bottom of the holding position in a penetrating manner.

9. A battery cell testing device, comprising a battery cell tray and a bearing mechanism according to any one of claims 1-8, wherein the battery cell tray is used for placing a battery cell to be tested, and the bearing mechanism is used for accommodating the battery cell tray.

10. A battery production system comprising the cell testing apparatus of claim 9.