CN219788048U

CN219788048U - Test clamping device

Info

Publication number: CN219788048U
Application number: CN202320274785.6U
Authority: CN
Inventors: 李昀隆; 刘德昌
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2023-02-21
Filing date: 2023-02-21
Publication date: 2023-10-03
Anticipated expiration: 2033-02-21

Abstract

The utility model relates to a test clamping device, comprising: the device comprises a bottom plate, a supporting part, a top plate and a measuring part, wherein the bottom plate is used for bearing a battery cell to be measured; the plurality of supporting parts are arranged, and the bottoms are respectively connected with the bottom plate; the top plate is arranged above the bottom plate and fixedly connected with the supporting part, and the middle part of the top plate is hollow to form a containing hole; the measuring part is arranged in the accommodating hole and moves upwards along with the expansion of the battery cell to be measured so that the top surface of the measuring part is higher than the top surface of the top plate, and further the change value of the thickness of the battery cell to be measured caused by the expansion is displayed, so that the battery cell is not required to be detached from the test clamping device every time the thickness of the battery cell is tested, the test efficiency is greatly improved, and the time and labor are saved in the thickness test of the battery cell.

Description

Test clamping device

Technical Field

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

Background

Calendar life tests may characterize the rate of capacity recovery of cells stored at different temperatures, often testing the capacity and thickness of cells every 7 days, every month, or more, etc. Because the square-shell ternary battery cell has more gas production in the charging and discharging processes, the battery cell is often inflated in the testing process, and thus the gas production of the battery cell can be estimated approximately by measuring the thickness of the battery cell. However, the conventional test fixture has a certain pressure on the battery cell, and therefore, each time the thickness of the battery cell after expansion is tested, the battery cell needs to be detached from the conventional test fixture. After that, make the electric core stand for a few hours, the electric core is fully expanded under the condition of no pressure, and the thickness is measured to the rethread slide caliper, so not only waste time and energy still, and test efficiency is still extremely low.

At present, when the thickness of the battery cell after expansion is tested each time, the battery cell needs to be detached from the traditional test clamping device, so that the test efficiency is low.

Disclosure of Invention

In order to solve the problem that the test efficiency is low because the battery core is often required to be detached from the traditional test clamping device when the thickness of the battery core is expanded every time, the utility model provides the test clamping device.

In order to achieve the object of the present utility model, there is provided a test clamping device comprising:

the bottom plate is used for bearing the battery core to be tested;

the plurality of support parts are provided, and the bottoms of the support parts are respectively connected with the bottom plate;

the top plate is arranged above the bottom plate and fixedly connected with the supporting part, and a containing hole is formed in the middle of the top plate in a hollow mode;

the measuring part is arranged in the accommodating hole, moves upwards along with the expansion of the battery cell to be measured, and displays the variation value of the thickness of the battery cell to be measured caused by the expansion.

In some of these embodiments, the measuring section includes:

the measuring plate is arranged in the accommodating hole, and at least one side surface of the measuring plate is provided with scales.

In some of these embodiments, the measurement section further includes:

the bottom surface area of the limiting plate is larger than the caliber of the accommodating hole, and the bottom surface of the limiting plate is fixedly connected with the top surface of the measuring plate.

In some embodiments, the aperture of the receiving hole is a predetermined aperture.

In some embodiments thereof, the method comprises:

and the cover plate is arranged above the top plate and is detachably connected with the supporting part.

In some embodiments thereof, the method comprises:

the upper sleeve is arranged between the bottom plate and the cover plate, sleeved on the outer surface of the supporting part and connected with the top plate in a sliding manner;

the lower sleeve is arranged between the top plate and the bottom plate and sleeved on the outer surface of the upper sleeve.

In some embodiments, the axial length of the lower sleeve is a predetermined length.

In some embodiments thereof, the method comprises:

the nut is in threaded connection with the supporting part, and the bottom surface is in butt joint with the top surface of the cover plate.

In some embodiments thereof, the method comprises:

the gasket is arranged between the nut and the cover plate.

In some embodiments, the gasket comprises a stack of resilient and flat washers.

The utility model has the beneficial effects that: according to the test clamping device, the bottom plate is arranged and used for bearing the battery core to be tested. The bottom plate is connected with the supporting part, and the roof sets up in the top of bottom plate, with supporting part fixed connection. The middle part of the top plate is hollow to form a containing hole, the part of the battery cell expansion is inserted, the measuring part arranged in the containing hole can move upwards along with the battery cell expansion on the bottom plate, and then the change value of the thickness of the battery cell caused by the expansion is measured and displayed, and the battery cell is not required to be detached from the test clamping device every time when the thickness of the battery cell is tested, so that the test efficiency is greatly improved, and the battery cell thickness test is time-saving and labor-saving.

Drawings

FIG. 1 is a schematic view of a test fixture according to the present utility model;

FIG. 2 is a schematic view of the structure of a support portion of a test clamping device according to the present utility model;

FIG. 3 is a schematic view of the top plate of a test fixture according to the present utility model;

FIG. 4 is a schematic view of the structure of a base plate of a test fixture of the present utility model;

FIG. 5 is a schematic view of the structure of a measuring part of a test fixture according to the present utility model;

FIG. 6 is a schematic view of the structure of a cover plate of a test fixture according to the present utility model;

FIG. 7 is a schematic view of the structure of a lower sleeve of a test fixture of the present utility model;

fig. 8 is a schematic structural view of an upper sleeve of a test fixture according to the present utility model.

110, bottom plate; 120. a support part; 130. a top plate; 140. a measuring section; 141. a scale; 142. a limiting plate; 143. a measuring plate; 150. a cover plate; 160. an upper sleeve; 170. a lower sleeve; 180. a nut; 190. a gasket; 200. and a battery cell.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Examples of the embodiments are illustrated in the accompanying drawings, wherein like or similar symbols indicate like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "top," "bottom," "inner," "outer," "axis," "circumferential," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience in describing the present utility model or simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus 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 one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," "engaged," "hinged," 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; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. 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.

The lithium ion power battery core is mainly divided into a square lithium battery, a cylindrical lithium battery and a soft package battery core. Among the most currently used positive electrode materials for power cells are lithium iron phosphate (LiFePO 4) and lithium nickel cobalt manganate (LiNixCoyMnzO 2). The power cell is produced to be characterized by a plurality of tests, wherein the self-discharge tests at different temperatures are an important index. In the prior art, the self-discharge test is to fix the battery cell on the fixture at first, then the wiring is used for carrying out the charge-discharge test, the battery cell is required to be detached from the fixture after discharging, and meanwhile, the battery cell is kept still for a few hours and the like, and then the thickness of the battery cell is measured through the vernier caliper after the battery cell is fully expanded, so that the fixture in the prior art can not directly measure the battery cell, the operation flow of an operator is increased, and the working efficiency is reduced.

In the embodiment of the utility model, the accommodating hole is formed in the middle of the top plate 130, and the measuring part 140 is arranged in the accommodating hole, so that the measuring part 140 can move upwards along with the expansion of the battery cell 200, the top surface of the measuring part 140 is higher than the top surface of the top plate 130, and the variation value of the thickness of the battery cell 200 to be measured caused by the expansion is displayed.

Referring to fig. 1, 2, 3 and 4, a cell 200 test fixture, comprising: a base plate 110, a supporting portion 120, and a measuring portion 140; the bottom plate 110 is used for carrying the battery cell 200 to be tested. The number of the supporting parts 120 is plural, and the bottoms are respectively connected with the bottom plate 110. The top plate 130 is disposed above the bottom plate 110 and fixedly connected with the supporting portion 120, a receiving hole is formed in the middle of the top plate 130, the measuring portion 140 is disposed in the receiving hole, and moves upward along with expansion of the to-be-measured battery cell 200, so that the top surface of the measuring portion 140 is higher than the top surface of the top plate 130, and further, a variation value of the thickness of the to-be-measured battery cell 200 caused by the expansion is displayed.

Specifically, the support parts 120 are provided in a plurality of four, vertically connected to four corners of the base plate 110, and detachably connected to the base plate 110. The battery cell 200 is placed on the bottom plate 110, a top plate 130 is arranged above the battery cell 200, and the top plate 130 is fixedly connected with the supporting part 120. The top plate 130 has a hollow receiving hole formed in the middle thereof. The inside measuring part 140 that is equipped with of holding hole, the bottom surface of measuring part 140 and the top surface of electric core 200 contact each other, leave the gap between measuring part 140 and the holding hole, make measuring part 140 can reciprocate in holding hole department. It is understood that the measurement portion 140 may move upward as the cell 200 expands, thereby measuring the thickness of the cell 200 as it expands.

In some embodiments of the present utility model, referring to fig. 5, the measuring part 140 includes: the measuring plate 143, the measuring plate 143 is arranged in the accommodating hole, and the scale 141 is arranged on at least one side surface of the measuring plate 143. It will be appreciated that the scale 141 may be moved upward with the measurement plate 143, and an operator may directly observe the value of the scale 141 to obtain the expanded thickness of the cell 200. Meanwhile, the scale 141 may be provided on one side or a plurality of sides of the measuring plate 143, further increasing the convenience of the operator to read the value of the scale 141.

In some embodiments of the present utility model, the measurement part 140 further includes: a limiting plate 142; the bottom surface area of limiting plate 142 is greater than the bore of holding hole, and the bottom surface of limiting plate 142 and the top surface fixed connection of measuring plate 143 limit measuring plate 143 in the top of holding hole. Preventing the measuring plate 143 from falling off in the receiving hole when the battery cell 200 is not placed on the base plate 110, thereby increasing difficulty in use.

In other embodiments of the present utility model, two sides of the measuring plate 143 and the side walls of the accommodating hole are respectively connected to the sliding rail structure, so that the measuring plate 143 can slide up and down in the accommodating hole. The problem of inaccurate measurement results due to the fact that the measurement plate 143 is deviated when the cell 200 contacts the measurement plate 143 because the cell 200 expands unevenly is prevented.

In some embodiments of the present utility model, the caliber of the accommodating hole is a preset caliber, the preset caliber of the accommodating hole is close to the battery cell 200 and smaller than the area of the upper surface of the battery cell 200, otherwise, the battery cell 200 is easy to be clamped into the accommodating hole. And the preset caliber of the accommodating hole is better as the preset caliber is closer to the upper surface area of the battery cell 200, so that the expanded part is not limited by the top plate 130, and the thickness of the battery cell 200 after expansion can be completely displayed

In some embodiments of the present utility model, referring to fig. 6, comprising: a cover plate 150; the cover plate 150 is disposed above the top plate 130 and detachably connected to the supporting portion 120. A certain distance is reserved between the cover plate 150 and the top plate 130, so that inaccurate measurement results caused by the fact that the cover plate 150 is propped against the cover plate 150 when the measurement part 140 moves upwards due to the fact that the distance between the cover plate 150 and the top plate 130 is too short are avoided. Meanwhile, if the battery cell 200 explodes during the test, the measuring part 140 may be ejected to cause injury to the operator. The measuring part 140 can also improve the safety of the entire jig.

In some embodiments of the present utility model, referring to fig. 7 and 8, comprising: an upper sleeve 160 and a lower sleeve 170, wherein the upper sleeve 160 is arranged between the bottom plate 110 and the top plate 130 and sleeved on the outer surface of the supporting part 120; the lower sleeve 170 is disposed between the top plate 130 and the bottom plate 110, and is sleeved on the outer surface of the supporting portion 120. The upper sleeve 160 is used for limiting the cover plate 150, and preventing the cover plate 150 from falling. The lower sleeve 170 is used for limiting the top plate 130, and meanwhile, the axial length of the lower sleeve 170 is a preset length, specifically: the height of the lower sleeve 170 is the same as that of the battery cell 200, so that the situation that the battery cell 200 is blocked into the accommodating hole and the clamp cannot operate due to the fact that the top plate 130 is directly covered on the battery cell 200 is avoided.

In some embodiments of the utility model, the method comprises: a nut 180; the nut 180 is screwed on the supporting portion 120, and the bottom surface abuts against the top surface of the cover plate 150, so that the tightness among the cover plate 150, the top plate 130, the bottom plate 110 and the supporting portion 120 can be ensured, and the overall stability of the fixture is further enhanced.

In some embodiments of the utility model, the method comprises: a spacer 190; the spacer 190 is interposed between the nut 180 and the cap plate 150. The gasket 190 includes a stacked elastic washer, a flat washer, and the like. The spacer 190 has the functions of increasing the contact area of the nut 180, reducing pressure, preventing loosening, protecting parts and increasing the overall service life of the device.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "examples," "particular examples," "one particular embodiment," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The present utility model is not limited to the above preferred embodiments, and any person skilled in the art, within the scope of the present utility model, may apply to the present utility model, and equivalents and modifications thereof are intended to be included in the scope of the present utility model.

Claims

1. A test clamping device, comprising:

the bottom plate is used for bearing the battery core to be tested;

the top plate is arranged above the bottom plate and fixedly connected with the supporting part, and the middle part of the top plate is hollow to form a containing hole;

and the measuring part is arranged in the accommodating hole and moves upwards along with the expansion of the battery cell to be measured so that the top surface of the measuring part is higher than the top surface of the top plate, and further the variation value of the thickness of the battery cell to be measured caused by the expansion is displayed.

2. The test clamping device of claim 1, wherein the measurement portion comprises:

3. The test clamping device of claim 2, wherein the measurement portion further comprises:

4. A test fixture as claimed in any one of claims 1 to 3, wherein the aperture of the receiving aperture is a predetermined aperture.

5. A test clamping device as claimed in any one of claims 1 to 3, comprising:

6. The test clamping device of claim 5, comprising:

the lower sleeve is arranged between the top plate and the bottom plate and sleeved on the outer surface of the supporting part;

and the upper sleeve is arranged between the top plate and the cover plate and sleeved on the outer surface of the supporting part.

7. The test clamping device of claim 6, wherein the axial length of the lower sleeve is a preset length.

8. The test clamping device of claim 5, comprising:

the nut is in threaded connection with the supporting part, and the bottom surface is in butt joint with the top surface of apron.

9. The test clamping device of claim 8, comprising:

and the gasket is arranged between the nut and the cover plate in a cushioning manner.

10. The test clamping device of claim 9, wherein the spacer comprises a stacked resilient washer and a flat washer.