Overvoltage prevention device for battery insulation test

Abstract

The utility model discloses an anti-overvoltage device for a battery insulation test, and the device comprises a driving part which is provided with an output end which is suitable for moving close to or away from a battery; the buffer part is connected with the output end of the driving part, a movable end capable of being selectively contracted is formed on the buffer part, and the movable end is suitable for abutting against the battery so as to drive the buffer part to contract after the pressure between the movable end and the battery exceeds the preset pressure. According to the anti-overpressure device, the buffering piece is arranged between the output end of the driving piece and the battery, the output end is connected with the buffering piece, the movable end capable of being selectively contracted is arranged on the buffering piece, and when the pressure applied to the battery by the movable end exceeds the preset pressure, the buffering piece can be contracted to buffer and release force in the opposite direction; therefore, the problems of battery deformation and the like caused by overlarge downward pressing pressure of the driving piece are prevented, and the yield of the battery in an insulation test is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery testing, and in particular to an overvoltage protection device for battery insulation testing. Background Art

[0002] In the related technology, square aluminum shell batteries are widely used in the lithium battery industry. Coating is a relatively important process in the post-production process of square aluminum shell batteries. Insulation testing is a key link, and the control of the pressure during insulation testing is particularly important. In traditional pressing devices, pressure is generally applied to the battery through a driving component. However, when the pressing speed of the driving component is too fast or the pressing pressure is too large, the insulation test will not be properly pressed against the battery blue film, and the battery may even be deformed due to excessive force, which seriously affects the test yield. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide an overpressure protection device for battery insulation testing. According to the overpressure protection device of the utility model, a buffer is arranged between the output end of the driving part and the battery, and the buffer is connected to the output end. A selectively retractable mobile end is arranged on the buffer. When the pressure applied to the battery by the mobile end exceeds the preset pressure, the buffer can be retracted to buffer the release force in the opposite direction, thereby preventing the occurrence of problems such as deformation of the battery due to excessive downward pressure of the driving part, thereby improving the yield of the battery in the insulation test.

[0004] According to the utility model, the overpressure protection device for battery insulation testing includes: a driving member, on which is provided an output end suitable for moving toward or away from a battery; a buffer member, the buffer member and the output end of the driving member, and the buffer member is formed with a movable end that can be selectively retracted, the movable end is suitable for abutting against the battery to drive the buffer member to retract after the pressure between the movable end and the battery exceeds a preset pressure.

[0005] According to the utility model, the overpressure protection device is provided with an output end moving toward the battery formed on the driving member, a buffer member is arranged between the output end of the driving member and the battery, the output end is connected to the buffer member and the output end drives the buffer member to move toward the battery, and a selectively retractable mobile end is arranged on the buffer member. When the pressure applied to the battery by the mobile end exceeds the preset pressure, the buffer member can shrink to buffer the force in the opposite direction, thereby preventing the occurrence of problems such as deformation of the battery due to excessive downward pressure of the driving member, thereby improving the yield of the battery in the insulation test.

[0006] According to some embodiments of the present invention, the buffer member and the output end are adapted to be slidably connected in a height direction.

[0007] According to some embodiments of the present invention, the buffer member is configured as an air cylinder, an oil cylinder and / or an elastic member.

[0008] According to some embodiments of the utility model, the buffer member is constructed as a cylinder and includes: a cylinder body, a compression chamber is formed inside the cylinder body; a piston rod, the piston rod is movably accommodated in the compression chamber, and the end of the piston rod is formed with the movable end suitable for abutting against the battery.

[0009] According to some embodiments of the utility model, a pressure regulating hole connecting the compression chamber with the outside is provided on the cylinder body, and the air flow can selectively enter or exit the compression chamber through the pressure regulating hole to adjust the pressure in the compression chamber.

[0010] According to some embodiments of the utility model, the overpressure prevention device further includes: a pressure regulating valve, which is openably and closably arranged at the pressure regulating hole, and the opening pressure of the pressure regulating valve is adjustable.

[0011] According to some embodiments of the present invention, the overpressure protection device further includes: an air source, wherein the air source is connected to the compression chamber so as to selectively replenish air into the compression chamber.

[0012] According to some embodiments of the utility model, the overpressure protection device also includes: a base, on which the battery is arranged, a protrusion protruding from the surface of the base is formed on the base, a limiting notch is formed on the protrusion, and the limiting notch abuts against the battery in the circumferential direction to limit the movement of the battery relative to the base; wherein the driving member can selectively drive the buffer member to move toward the limiting notch.

[0013] According to some embodiments of the utility model, the overpressure protection device also includes: a first plate and a second plate, the first plate and the second plate are respectively arranged on both sides of the length direction of the base, and a first guide groove and a second guide groove extending in the height direction are respectively formed on the side of the first plate and the second plate opposite to each other; a first bracket and a second bracket, the first bracket and the second bracket are respectively slidably arranged in the first guide groove and the second guide groove and connected to the buffer member.

[0014] According to some embodiments of the present invention, the overpressure protection device further includes: a pressure sensor, wherein the pressure sensor is disposed between the mobile terminal and the battery to monitor the pressure applied by the mobile terminal to the battery.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 is a front view of an overpressure protection device according to an embodiment of the utility model;

[0018] Figure 2 It is a structural schematic diagram of an overpressure protection device according to an embodiment of the utility model.

[0019] Reference numerals:

[0020] 100. Overpressure protection device;

[0021] 11. driving member; 12. cylinder; 121. piston rod;

[0022] 21. first plate; 22. second plate; 23. first bracket; 24. second bracket; 241. second guide groove;

[0023] 31. Base; 311. Protrusion; 312. Limiting notch; 32. Pressure sensor. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0025] In the related technology, square aluminum shell batteries are widely used in the lithium battery industry. Coating is a relatively important process in the post-production process of square aluminum shell batteries. Insulation testing is a key link, and the control of the pressure during insulation testing is particularly important. In traditional pressing devices, pressure is generally applied to the battery through a driving component. However, when the pressing speed of the driving component is too fast or the pressing pressure is too large, the insulation test will not be properly pressed against the battery blue film, and the battery may even be deformed due to excessive force, which seriously affects the test yield.

[0026] Reference below Figure 1-Figure 2 An overvoltage protection device for battery insulation testing according to an embodiment of the present invention is described.

[0027] According to the utility model, the overpressure protection device 100 for battery insulation testing includes: a driving member 11 and a buffer member, the driving member 11 is provided with an output end suitable for moving toward or away from the battery; the buffer member and the output end of the driving member 11, and the buffer member is formed with a movable end that can be selectively retracted, and the movable end is suitable for abutting against the battery to drive the buffer member to retract after the pressure between the movable end and the battery exceeds a preset pressure.

[0028] In some specific embodiments, the overpressure protection device 100 is composed of components such as a driving member 11 and a buffer member. The battery is arranged on the overpressure protection device 100. The driving member 11 is provided with an output end, and the output end can move in a direction close to or away from the battery. The buffer member is connected to the output end, and the output end can drive the buffer member to move in a direction close to or away from the battery. The buffer member is provided with a selectively retractable mobile end. During the insulation test, the output end drives the buffer member to move toward the battery, and the mobile end abuts against the battery, and the mobile end applies pressure toward the battery. When the pressure applied to the battery by the mobile end exceeds the preset pressure, the buffer member can contract to buffer the force in the opposite direction. At the same time, the mobile end of the buffer member will move in a direction away from the battery, thereby preventing the driving member 11 from pressing down too much and the driving member 11 from moving beyond the preset position to cause battery deformation. The yield of the battery in the insulation test is improved.

[0029] According to the utility model, the overpressure protection device 100 is provided with an output end moving toward the battery on the driving member 11, a buffer member is arranged between the output end of the driving member 11 and the battery, the output end is connected to the buffer member, the output end drives the buffer member to move toward the battery, and a selectively retractable mobile end is arranged on the buffer member. When the pressure applied to the battery by the mobile end exceeds the preset pressure, the buffer member can shrink to buffer the force in the opposite direction, thereby preventing the driving member 11 from pressing down too much and causing the battery to deform, thereby improving the yield of the battery in the insulation test.

[0030] According to some embodiments of the present invention, the buffer member and the output end are adapted to be slidably connected in a height direction.

[0031] In some specific embodiments, a slide rail is provided on the side of the output end of the driving member 11 facing the battery in the thickness direction, the slide rail extends in the height direction, a slidable slider is provided on the slide rail, the slider is connected to the buffer, thereby realizing a sliding connection between the buffer and the driving member 11, and the top of the buffer is spaced apart from the top of the driving member 11, thereby leaving a certain space for the sliding of the buffer. When the pressure between the mobile end and the battery exceeds a preset value, the buffer can contract to buffer the force in the opposite direction, and under the action of the buffer force, it can move along the slide rail in a direction opposite to the movement direction of the driving member 11 to prevent the mobile end from moving beyond the preset position, thereby improving the yield of the battery in the insulation test.

[0032] According to some embodiments of the present invention, the buffer member is configured as an air cylinder 12, an oil cylinder and / or an elastic member.

[0033] In some specific embodiments, when the buffer is constructed as a cylinder 12, the interior of the cylinder 12 is filled with gas. Due to the compressibility of the gas, when the moving end is subjected to a reverse force, it can move toward the inside of the cylinder 12 to prevent the moving end of the cylinder 12 from moving beyond a preset position, thereby improving the yield of the battery in the insulation test.

[0034] According to some embodiments of the utility model, the buffer member is constructed as a cylinder 12 and includes: a cylinder body and a piston rod 121, a compression chamber is formed inside the cylinder body; the piston rod 121 is movably accommodated in the compression chamber, and the end of the piston rod 121 is provided with a movable end suitable for abutting against the battery.

[0035] In some specific embodiments, the buffer member can be constructed as a cylinder 12, which is mainly composed of a cylinder body and a piston rod 121. The cylinder body is slidably connected to the output end and extends in the height direction. A compression chamber is formed in the cylinder body, and compressed air is arranged in the compression chamber. The flow rate of the compressed air can be adjusted as needed. One end of the piston rod 121 is arranged in the compression chamber, and the piston rod 121 can move along the extension direction of the cylinder body. The other end of the piston rod 121 stops at the battery, and the piston rod 121 applies pressure toward the battery. When the pressure applied to the battery by the piston rod 121 exceeds the preset pressure, due to the compressibility of the gas, the piston rod 121 can move toward the inside of the compression chamber, thereby preventing the driving member 11 from pressing down too much and the driving member 11 from moving beyond the preset position to cause deformation of the battery, thereby improving the yield of the battery in the insulation test.

[0036] According to some embodiments of the utility model, a pressure regulating hole connecting the compression chamber with the outside is provided on the cylinder body, and the air flow can selectively enter or exit the compression chamber through the pressure regulating hole to adjust the pressure in the compression chamber.

[0037] In some specific embodiments, a pressure regulating hole is further provided on the cylinder body, which connects the compression chamber with the outside, and the gas can selectively enter or exit the compression chamber through the pressure regulating hole to adjust the pressure in the compression chamber, and the user can also change the pressure of the cylinder 12 by adjusting the size of the pressure regulating hole. When the pressure regulating hole is opened, part of the gas can be released from the compression chamber to reduce the pressure of the cylinder 12. When the pressure regulating hole is closed, the gas cannot flow out of the compression chamber or enter the compression chamber, so that the pressure of the cylinder 12 is maintained within a preset range.

[0038] According to some embodiments of the present invention, the overpressure prevention device 100 further includes: a pressure regulating valve, which is openably and closably arranged at the pressure regulating hole, and the opening pressure of the pressure regulating valve is adjustable.

[0039] In some specific embodiments, a pressure regulating valve is also provided on the cylinder 12. The pressure regulating valve can be opened and closed at the pressure regulating hole to control the opening and closing of the pressure regulating hole. The amount of gas entering the compression chamber can be controlled, so that the pressure regulating valve can adjust the pressure value in the cylinder 12 as needed to ensure that the cylinder 12 operates within the required pressure range. The pressure regulating valve can prevent the cylinder 12 from being damaged due to excessive pressure. The pressure regulating valve can limit the pressure in the cylinder 12 to a safe range to avoid excessive pressure load on the system.

[0040] According to some embodiments of the present invention, the overpressure protection device 100 further includes: an air source, which is connected to the compression chamber to selectively replenish air into the compression chamber.

[0041] In some specific embodiments, the overpressure protection device 100 is also provided with an air source, which is connected to the compression chamber. The air source can provide compressed air or other gas as a power source in the compression chamber to ensure that the internal pressure of the cylinder 12 is at the required pressure value at all times. When the air source is injected into the compression chamber, the pressure of the gas can push the piston rod 121 to move, and can also make the piston rod 121 move toward the inside of the compression chamber under the action of force. By controlling the air source to control the flow and pressure of the gas, precise control of the cylinder 12 is achieved, for example, the cylinder 12 can achieve various motion modes in different applications, such as pushing, pulling, rotating or reciprocating. The user can adjust the pressure and flow of the air source as needed to control the movement speed and force generated by the cylinder 12, so that the cylinder 12 can meet a variety of working conditions and ensure the required motion effect and force output.

[0042] According to some embodiments of the utility model, the overpressure protection device 100 also includes: a base 31, a battery is arranged on the base 31, a protrusion 311 protruding from the surface of the base 31 is formed on the base 31, a limiting notch 312 is formed on the protrusion 311, and the limiting notch 312 abuts against the battery in the circumferential direction to limit the movement of the battery relative to the base 31; wherein the driving member 11 can selectively drive the buffer member to move toward the limiting notch 312.

[0043] In some specific embodiments, a base 31 is further provided in the overpressure prevention device, and the battery is arranged on the base 31. A protrusion 311 protruding from the surface of the base 31 is formed on the surface of the base 31 facing the buffer member, and a rectangular limiting notch 312 is formed on the side of the protrusion 311 facing the battery. The inner wall of the limiting notch 312 abuts against the outer surface of the battery in the circumferential direction. On the one hand, it has a positioning effect on the battery startup, so that each replaced battery can be placed in the same position, ensuring the uniformity of the pressing effect of the cylinder 12 on different batteries. On the other hand, it also has a certain limiting effect on the battery, which can effectively prevent the battery from moving during the test, thereby ensuring the test effect.

[0044] According to some embodiments of the utility model, the overpressure protection device 100 also includes: a first plate 21, a second plate 22, a first bracket 23 and a second bracket 24, the first plate 21 and the second plate 22 are respectively arranged on both sides of the length direction of the base 31, and a first guide groove and a second guide groove 241 extending in the height direction are respectively formed on the side of the first plate 21 and the second plate 22 that are opposite to each other; the first bracket 23 and the second bracket 24 are respectively slidably arranged in the first guide groove and the second guide groove 241 and connected to the buffer.

[0045] In some specific embodiments, the base 31 is further provided with a first plate 21 and a second plate 22 on both sides in the length direction, the first plate 21 and the second plate 22 respectively extend away from the base 31 in a direction perpendicular to the base 31, the tops of the first plate 21 and the second plate 22 are respectively spaced apart from the driving member 11, a first guide groove is formed on the first plate 21, and a second guide groove 241 is formed on the second plate 22, the first guide groove and the second guide groove 241 are arranged opposite to each other and extend in the height direction respectively, and a first bracket 23 and a second bracket 24 are further provided in the overpressure protection device 100. Bracket 24, one end of the first bracket 23 is slidably set in the first guide groove, the other end of the first bracket 23 is connected to the moving end of the buffer, one end of the second bracket 24 is slidably set in the second guide groove 241, the other end of the second bracket 24 is connected to the moving end of the buffer, under the push of the reverse force, the first bracket 23 and the second bracket 24 can drive the moving end of the buffer to move along the first guide groove and the second guide groove 241 along the height direction to prevent the moving displacement of the mobile end from exceeding the preset position, thereby improving the yield of the battery in the insulation test.

[0046] According to some embodiments of the present invention, the overpressure prevention device 100 further includes: a pressure sensor 32 , which is disposed between the mobile terminal and the battery to monitor the pressure applied by the mobile terminal to the battery.

[0047] In some specific embodiments, a pressure sensor 32 is further provided between the mobile terminal and the battery to monitor in real time the pressure applied by the cylinder 12 to the battery. When the value displayed on the pressure sensor 32 exceeds the preset pressure, the pressure in the cylinder 12 can be adjusted by a regulating valve to ensure that the pressure applied by the cylinder 12 to the battery is always below the preset value.

[0048] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0049] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0050] In the description of the present invention, "plurality" means two or more.

[0051] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.

[0052] In the description of the present invention, a first feature “above”, “over” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0054] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An overvoltage protection device (100) for battery insulation testing, characterized in that: include: A driving member (11), wherein the driving member (11) is provided with an output end suitable for moving toward or away from the battery; A buffer, the buffer and the output end of the driving member (11), and the buffer is formed with a movable end that can be selectively retracted, the movable end is suitable for abutting against the battery to drive the buffer to retract after the pressure between the movable end and the battery exceeds a preset pressure.

2. The overvoltage protection device (100) for battery insulation testing according to claim 1, characterized in that: The buffer member and the output end are adapted to be slidably connected in a height direction.

3. The overvoltage protection device (100) for battery insulation testing according to claim 1, characterized in that: The buffer member is configured as an air cylinder (12), an oil cylinder and / or an elastic member.

4. The overvoltage protection device (100) for battery insulation testing according to claim 3, characterized in that: The buffer member is configured as a cylinder (12) and comprises: A cylinder body, wherein a compression chamber is formed inside the cylinder body; A piston rod (121), wherein the piston rod (121) is movably accommodated in the compression chamber, and the end of the piston rod (121) is formed with the movable end suitable for abutting against the battery.

5. The overvoltage protection device (100) for battery insulation testing according to claim 4, characterized in that: The cylinder body is provided with a pressure regulating hole connecting the compression chamber with the outside, and the air flow can selectively enter or exit the compression chamber through the pressure regulating hole to adjust the pressure in the compression chamber.

6. The overvoltage protection device (100) for battery insulation testing according to claim 5, characterized in that: Also includes: A pressure regulating valve is provided at the pressure regulating hole in an openable and closable manner, and the opening pressure of the pressure regulating valve is adjustable.

7. The overvoltage protection device (100) for battery insulation testing according to claim 5, characterized in that: Also includes: An air source is communicated with the compression chamber to selectively supply air into the compression chamber.

8. The overvoltage protection device (100) for battery insulation testing according to claim 1, characterized in that: Also includes: A base (31), the battery being arranged on the base (31), the base (31) being provided with a protrusion (311) protruding from a surface of the base (31), the protrusion (311) being provided with a limiting notch (312), the limiting notch (312) being abutted against the battery in a circumferential direction so as to limit the movement of the battery relative to the base (31); wherein The driving member (11) can selectively drive the buffer member to move toward the limiting notch (312).

9. The overvoltage protection device (100) for battery insulation testing according to claim 8, characterized in that: Also includes: A first plate (21) and a second plate (22), wherein the first plate (21) and the second plate (22) are respectively arranged on two sides of the base (31) in the length direction, and a first guide groove and a second guide groove (241) extending in the height direction are respectively formed on the sides of the first plate (21) and the second plate (22) facing each other; A first bracket (23) and a second bracket (24), wherein the first bracket (23) and the second bracket (24) are respectively slidably disposed in the first guide groove and the second guide groove (241) and are connected to the buffer member.

10. The overvoltage protection device (100) for battery insulation testing according to claim 1, characterized in that: Also includes: A pressure sensor (32) is arranged between the mobile terminal and the battery to monitor the pressure applied by the mobile terminal to the battery.

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