Square battery liquid injection clamp and square battery

Abstract

The utility model provides a square battery liquid injection clamp and a square battery, and the square battery liquid injection clamp comprises a bottom plate, a positioning plate and two pressing plates, the positioning plate is connected with the bottom plate in a lifting manner and is used for positioning and supporting the bottom surface and the side surface in the width direction of the square battery; the two pressing plates are arranged at intervals, can move oppositely in the horizontal direction and are used for clamping two large faces of the square battery, and the top faces of the pressing plates are flush with the top face of the square battery. The positioning plate is connected with the bottom plate in a lifting manner and is adaptive to square batteries with different heights, so that the top surfaces of the square batteries are flush with the top surface of the pressing plate; the two pressing plates are arranged at intervals and used for clamping the two large faces of the square battery, the pressing plates can move oppositely in the horizontal direction, so that the square batteries with different widths can be adapted, the manufacturing cost of the batteries is reduced, the distance between the two pressing plates can be adjusted, the situation that the appearance of the batteries is abnormal after liquid injection due to deviation of the size of the liquid injection tool is avoided, and the production efficiency is improved. And the liquid injection quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a square battery liquid injection fixture and a square battery. Background Art

[0002] The electrolyte is the carrier for ion transport in the battery, conducting ions between the positive and negative electrodes. It is the guarantee for the normal operation and charging and discharging of lithium-ion batteries. During the battery production process, the electrolyte is generally introduced into the battery through the injection process. During the injection operation, the battery is usually fixed with an injection fixture to prevent the battery casing from deforming due to positive and negative pressure during the injection process, which may affect the battery's electrochemical performance and appearance.

[0003] The existing method of filling square batteries is to place a set of filling tools designed according to the battery cell size in a fixed, non-adjustable fixture, and then place the battery exactly in the middle of the tooling to complete the filling. It is necessary to ensure that the large surface of the battery fits in the filling tooling during the filling process so that the large surface of the battery will not bulge after the filling.

[0004] Currently, there are numerous prismatic battery models. Therefore, if fixed injection fixtures were used, each battery model would require the design of one or more sets of redesigned injection fixtures, undoubtedly increasing lithium-ion battery manufacturing costs. Furthermore, fixed fixtures cannot be adjusted during production, and any deviation in the injection fixture dimensions can result in an abnormal appearance of the battery after injection. Utility Model Content

[0005] In view of this, the present invention proposes a square battery filling fixture and a square battery to solve the technical problem that there are many types of square batteries proposed in the above background technology, and each type of battery requires a redesign of one or more sets of filling tooling, which increases the manufacturing cost of the battery. In addition, if there is a deviation in the size of the filling tooling, it will lead to abnormal appearance of the battery after filling.

[0006] The technical solution of the present utility model is achieved as follows:

[0007] In a first aspect, the utility model provides a square battery filling fixture, comprising a base plate, a positioning plate and two pressing plates, wherein:

[0008] The positioning plate is connected to the bottom plate in a liftable manner and is used to position and support the bottom surface and the side surfaces along the width direction of the square battery;

[0009] The two pressing plates are spaced apart and can move toward each other in the horizontal direction, and are used to clamp the two large surfaces of the square battery. The top surface of the pressing plate is flush with the top surface of the square battery.

[0010] On the basis of the above technical solution, preferably, the positioning plate is located between the two pressing plates, and the thickness of the positioning plate is smaller than the width of the square battery.

[0011] On the basis of the above technical solution, preferably, the positioning plate includes a horizontal plate and a vertical plate perpendicular to each other, the horizontal plate is supported on the bottom surface of the square battery, and the vertical plate is attached to the side surface of the square battery.

[0012] On the basis of the above technical solution, preferably, it further includes a lifting cylinder, which is installed on the base plate and connected to the bottom of the positioning plate.

[0013] On the basis of the above technical solution, preferably, a slide groove parallel to the moving direction of the pressure plate is provided on the bottom plate, and the lifting cylinder is slidably installed in the slide groove.

[0014] On the basis of the above technical solution, preferably, it further includes two pushing cylinders, which are relatively installed on the base plate, the output ends of the pushing cylinders are connected to the pressure plate, and the pushing direction is parallel to the horizontal direction.

[0015] On the basis of the above technical solution, preferably, the pressing plate includes a first clamping plate and a second clamping plate, and the first clamping plate and the second clamping plate are connected to each other with a gap;

[0016] The square battery filling fixture further includes a heating plate, which is arranged in the gap.

[0017] On the basis of the above technical solution, preferably, the length and width of the pressing plate are respectively larger than the length and width of the large surface of the largest square battery on the market.

[0018] On the basis of the above technical solution, preferably, after the liquid injection is completed, the two pressing plates continue to apply pressure to the large surface of the square battery to perform shaping.

[0019] In a second aspect, the present invention provides a square battery manufactured using the square battery injection fixture described in the first aspect.

[0020] The square battery filling fixture of the present invention has the following beneficial effects compared with the prior art:

[0021] (1) The positioning plate can be raised and lowered to connect with the bottom plate, and is used to position and support the bottom surface and the side surface along the width direction of the square battery, and is adapted to square batteries of different heights, so that the top surface of the square battery is flush with the top surface of the pressing plate; the two pressing plates are arranged at intervals, and are used to clamp the two large surfaces of the square battery. The pressing plates can move toward each other in the horizontal direction, so that they can adapt to square batteries of different widths; the above injection fixture can adapt to square batteries of different heights and thicknesses. It only needs to set the length of the pressing plate to be large enough to adapt to square batteries of various specifications and sizes, thereby reducing the manufacturing cost of the battery. The spacing between the two pressing plates can be adjusted, and the abnormal appearance of the battery after injection due to deviation in the size of the injection tooling will not be caused, thereby improving the quality of injection;

[0022] (2) The positioning plate is located between the two pressing plates, and the thickness of the positioning plate is smaller than the width of the square battery, that is, the positioning plate is smaller than the minimum width of all square batteries on the market, ensuring that square batteries of all sizes can be supported and positioned by the positioning plate, thereby improving the applicability of the device;

[0023] (3) The positioning plate includes a horizontal plate and a vertical plate that are perpendicular to each other. The horizontal plate is supported on the bottom surface of the square battery so that the top surface of the square battery is flush with the top surface of the pressure plate. The vertical plate is attached to the side surface of the square battery to position the side surface of the square battery, which is convenient for liquid injection operation, improves the reliability and stability of the device, and improves the liquid injection efficiency;

[0024] (4) The lifting cylinder is installed on the bottom plate and connected to the bottom of the horizontal plate to achieve height adjustment of the positioning plate to adapt to square batteries of different heights, ensuring that the top surface of the square battery is flush with the top surface of the pressure plate, thereby improving the applicability of the fixture;

[0025] (5) A slide groove parallel to the moving direction of the pressing plate is provided on the bottom plate, and the lifting cylinder is slidably installed in the slide groove. The lifting cylinder can slide along the slide groove, thereby adjusting the position where the positioning plate contacts the bottom surface of the square battery, ensuring that the horizontal plate is supported at the center of the bottom surface of the square battery, thereby improving the stability and reliability of the clamp;

[0026] (6) The first clamping plate and the second clamping plate are connected to each other and have a gap; the heating plate is set in the gap, and the battery is heated by the heating plate, which can accelerate the electrolyte to enter the internal pores of the electrode and the diaphragm, increase the infiltration speed, improve the problem of liquid bubbling during injection, improve the injection quality, and improve the stability and reliability of the clamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 A three-dimensional diagram of the square battery filling fixture of the present invention;

[0029] Figure 2 This is a three-dimensional diagram of the positioning plate, two pressing plates and two pushing cylinders of the utility model;

[0030] Figure 3 A three-dimensional diagram of a positioning plate, a pressing plate and a pushing cylinder of the utility model;

[0031] Figure 4 This is a schematic structural diagram of the pressing plate and the heating plate of the present invention.

[0032] Description of reference numerals: 1-bottom plate, 2-positioning plate, 3-pressing plate, 4-lifting cylinder, 5-pushing cylinder, 6-heating plate;

[0033] 100-square battery; 200-liquid filling machine;

[0034] 11- chute;

[0035] 21- horizontal board, 22- vertical board;

[0036] 31-first clamping plate, 32-second clamping plate, 33-gap. DETAILED DESCRIPTION

[0037] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] Reference Figures 1-4 As shown, the embodiment of the present utility model provides a square battery filling fixture, comprising a base plate 1, a positioning plate 2 and two pressing plates 3, wherein:

[0039] The positioning plate 2 is connected to the bottom plate 1 in a liftable manner and is used to position and support the bottom surface and side surfaces along the width direction of the square battery 100, so that the bottom surface of the square battery 100 is parallel to the horizontal plane and the side surfaces are parallel to the vertical plane. The positioning plate 2 is located between the two pressing plates 3;

[0040] The two pressure plates 3 are spaced apart and can move toward each other horizontally to clamp the two large surfaces of the prismatic battery 100. The top surfaces of the pressure plates 3 are flush with the top surfaces of the prismatic battery 100. The two pressure plates 3 move toward each other and the spacing between them is adjusted to clamp the two large surfaces of the prismatic battery 100 between the two pressure plates 3. The large surface of the prismatic battery 100 is the surface with the largest area.

[0041] The square battery injection fixture provided in this embodiment is connected to the base plate 1 in a liftable manner through the positioning plate 2, and is used to position and support the bottom surface and the side surfaces along the width direction of the square battery 100, and is adapted to square batteries 100 of different heights so that the top surface of the square battery 100 is flush with the top surface of the pressing plate 3; the two pressing plates 3 are arranged at intervals and are used to clamp the two large surfaces of the square battery 100, and the pressing plates 3 can move toward each other in the horizontal direction, so that they can adapt to square batteries 100 of different widths; the above injection fixture can adapt to square batteries 100 of different heights and thicknesses, and it only needs to set the length of the pressing plate 3 to be large enough to adapt to square batteries 100 of various specifications and sizes, thereby reducing the manufacturing cost of the battery, and the spacing between the two pressing plates 3 can be adjusted, and the abnormal appearance of the battery after injection due to deviation in the size of the injection tooling will not be caused, thereby improving the quality of the injection.

[0042] In some embodiments, the positioning plate 2 is located between the two pressing plates 3, and the thickness of the positioning plate 2 is less than the width of the square battery 100. Since the thickness of the positioning plate 2 is less than the width of the square battery 100, that is, the positioning plate 2 is less than the minimum width of all square batteries 100 on the market, it ensures that square batteries 100 of all sizes can be supported and positioned by the positioning plate 2, thereby improving the applicability of the device.

[0043] In some embodiments, the positioning plate 2 includes a horizontal plate 21 and a vertical plate 22 that are perpendicular to each other. The horizontal plate 21 is parallel to the horizontal plane, and the vertical plate 22 is parallel to the vertical plane. The horizontal plate 21 is supported on the bottom surface of the square battery 100, and the vertical plate 22 is attached to the side surface of the square battery 100. Because the horizontal plate 21 and the vertical plate 22 are perpendicular to each other, the horizontal plate 21 is supported on the bottom surface of the square battery 100, so that the top surface of the square battery 100 is flush with the top surface of the pressing plate 3, and the vertical plate 22 is attached to the side surface of the square battery 100, positioning the side surface of the square battery 100, facilitating the injection operation, improving the reliability and stability of the device, and improving the injection efficiency.

[0044] In some embodiments, the prismatic battery injection fixture further includes a lifting cylinder 4, which is mounted on the base plate 1 and connected to the bottom of the transverse plate 21. By mounting the lifting cylinder 4 on the base plate 1 and connecting it to the bottom of the transverse plate 21 of the positioning plate 2, the height of the positioning plate 2 can be adjusted to accommodate prismatic batteries 100 of varying heights, ensuring that the top surface of the prismatic battery 100 is flush with the top surface of the pressing plate 3, thereby improving the applicability of the fixture.

[0045] In some embodiments, when the width of the square battery 100 is much larger than the thickness of the positioning plate 2, if the positioning plate 2 is not located at the bottom center of the square battery 100, the positioning support of the square battery 100 will be unstable. To address the above problem, in this embodiment, a slide groove 11 parallel to the moving direction of the pressing plate 3 is provided on the bottom plate 1, and the lifting cylinder 4 is slidably installed in the slide groove 11. The lifting cylinder 4 is slidably installed in the slide groove 11 by providing a slide groove 11 parallel to the moving direction of the pressing plate 3 on the bottom plate 1. The lifting cylinder 4 can slide along the slide groove 11, thereby adjusting the position where the positioning plate 2 contacts the bottom surface of the square battery 100, ensuring that the cross plate 21 is supported at the center of the bottom surface of the square battery 100, and improving the stability and reliability of the clamp.

[0046] In some embodiments, the square battery injection fixture further includes two push cylinders 5, which are mounted relative to each other on the base plate 1. The output ends of the push cylinders 5 are connected to the pressure plate 3, and the pushing direction is parallel to the horizontal direction. By connecting the output ends of the push cylinders 5 to the pressure plate 3, and pushing in a direction parallel to the horizontal direction, the push cylinders 5 push the pressure plate 3 to move, thereby causing the two pressure plates 3 to move toward each other, thereby achieving large-surface clamping of the square battery 100 and adapting to square batteries 100 of different widths.

[0047] In some embodiments, the pressing plate 3 includes a first clamping plate 31 and a second clamping plate 32, which are interconnected and have a gap 33. The square battery filling fixture further includes a heating plate 6, which is disposed in the gap 33. The first clamping plate 31 and the second clamping plate 32 are interconnected and have a gap 33, and the heating plate 6 is disposed in the gap 33. By heating the battery through the heating plate 6, the electrolyte can be accelerated to enter the internal pores of the electrode and diaphragm, increasing the infiltration speed, improving the problem of electrolyte overflow during injection, improving the injection quality, and enhancing the stability and reliability of the fixture.

[0048] In some embodiments, the length and width of the pressing plate 3 are respectively greater than the length and width of the largest surface of the prismatic battery 100 on the market. By ensuring that the length of the pressing plate 3 is greater than the length of the largest surface of the prismatic battery 100 on the market, and the width of the pressing plate 3 is greater than the width of the largest surface of the prismatic battery 100 on the market, the pressing plate 3 can be used to press prismatic batteries 100 of all sizes on the market, ensuring that the injection fixture can cover the injection of full-size prismatic batteries 100, and improving the applicability of the device.

[0049] In some embodiments, after liquid injection is complete, the two pressing plates 3 continue to apply pressure to the large surface of the prismatic battery 100 to shape it. After liquid injection is complete, the two pushing cylinders 5 continue to push the two pressing plates 3 toward each other, continuing to squeeze and shape the shell of the prismatic battery 100 through the two baffles, thereby improving the appearance of bulging cells and the problem of excessive liquid injection, thereby improving the quality of the prismatic battery 100.

[0050] The working principle of the square battery injection fixture is as follows: the bottom surface and the side surface along the width direction of the square battery 100 are attached to the positioning plate 2, and the two large surfaces of the square battery 100 are clamped by the two pressing plates 3 moving toward each other. After the square battery 100 is clamped, the top surface of the pressing plate 3 is flush with the top surface of the square battery 100, and the side surface is positioned by the positioning plate 2. The injection machine 200 is used to align the injection hole of the square battery 100 for injection. The injection fixture can adapt to square batteries 100 of different heights and thicknesses. It only needs to set the length of the pressing plate 3 to be large enough to adapt to square batteries 100 of various specifications and sizes, thereby reducing the manufacturing cost of the battery. In addition, the spacing between the two pressing plates 3 can be adjusted, and the battery appearance after injection will not be abnormal due to deviations in the size of the injection tooling, thereby improving the quality of the injection.

[0051] In a second aspect, the present invention provides a square battery manufactured using the square battery injection fixture described in the first aspect.

[0052] The square battery provided in this embodiment reduces the manufacturing cost of the battery because the square battery injection fixture used can be adapted to square batteries of various specifications and sizes. In addition, the spacing between the two pressure plates 3 can be adjusted, and the abnormal appearance of the battery after injection due to deviation in the size of the injection tooling will not occur. The quality of the injection is improved, thereby improving the yield of the square battery.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A square battery filling fixture, characterized in that: It comprises a bottom plate (1), a positioning plate (2) and two pressing plates (3), wherein: The positioning plate (2) is connected to the bottom plate (1) in a liftable manner and is used to position and support the bottom surface and the side surfaces along the width direction of the square battery (100); The two pressing plates (3) are spaced apart and can move toward each other in the horizontal direction, and are used to clamp the two large surfaces of the square battery (100). The top surface of the pressing plate (3) is flush with the top surface of the square battery (100).

2. The square battery liquid injection fixture according to claim 1, characterized in that: The positioning plate (2) is located between the two pressing plates (3), and the thickness of the positioning plate (2) is smaller than the width of the square battery (100).

3. The square battery injection fixture according to claim 1, characterized in that: The positioning plate (2) comprises a transverse plate (21) and a vertical plate (22) perpendicular to each other, the transverse plate (21) being supported on the bottom surface of the square battery (100), and the vertical plate (22) being attached to the side surface of the square battery (100).

4. The square battery injection fixture according to claim 1, characterized in that: It also includes a lifting cylinder (4), which is installed on the base plate (1) and connected to the bottom of the positioning plate (2).

5. The square battery injection fixture according to claim 4, characterized in that: The bottom plate (1) is provided with a slide groove (11) parallel to the moving direction of the pressing plate (3), and the lifting cylinder (4) is slidably installed in the slide groove (11).

6. The square battery injection fixture according to claim 1, characterized in that: It also includes two pushing cylinders (5), which are relatively mounted on the base plate (1), the output ends of the pushing cylinders (5) are connected to the pressure plate (3), and the pushing direction is parallel to the horizontal direction.

7. The square battery liquid injection fixture according to claim 1, characterized in that: The pressing plate (3) comprises a first clamping plate (31) and a second clamping plate (32), wherein the first clamping plate (31) and the second clamping plate (32) are connected to each other and have a gap (33); The square battery liquid injection fixture further comprises a heating plate (6), and the heating plate (6) is arranged in the gap (33).

8. The square battery liquid injection fixture according to claim 1, characterized in that: The length and width of the pressing plate (3) are respectively greater than the length and width of the large surface of the largest square battery (100) on the market.

9. The square battery liquid injection fixture according to claim 1, characterized in that: After the liquid injection is completed, the two pressing plates (3) continue to apply pressure to the large surface of the square battery (100) to perform shaping.

10. A square battery, characterized in that: It is manufactured using the square battery injection fixture described in any one of claims 1 to 9.

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