Pressurizing tool for cycle test of soft package battery

Abstract

The utility model discloses a soft package battery cycle test pressurization tool, which comprises a base, a pressing plate assembly and a pressurization assembly, the pressing plate assembly comprises a first pressing plate, a movable pressing plate and a second pressing plate which are sequentially arranged in the vertical direction, the first pressing plate is installed on the upper surface of the base, the second pressing plate can move up and down, and the movable pressing plate is installed on the upper surface of the base. The movable pressing plate is installed between the first pressing plate and the second pressing plate, the movable pressing plate is used for bearing a soft package battery, the pressurizing assembly comprises a linear driving device connected with the base and a driving part capable of moving up and down, and the driving part is connected with the second pressing plate. According to the technical scheme of the utility model, the movable pressing plate is arranged between the first pressing plate and the second pressing plate, and the soft package batteries are placed on the upper side surface of the movable pressing plate and the upper surface of the first pressing plate, so that two soft package batteries can be pressurized at the same time for pressure testing each time, and the testing efficiency of single-time pressurization is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of soft-pack batteries, in particular to a soft-pack battery cycle test pressurization tooling. Background Art

[0002] After the graphite negative electrode material is produced, its various properties need to be tested. It is often made into lithium-ion soft-pack batteries for performance testing to characterize the various properties of the graphite material. During the test, a pressurized tool is required to fix the soft-pack battery (the electrode will expand and produce gas during the battery cycle. If the pressurized tool is not used, the positive and negative electrodes will not be in contact at the microscopic level, resulting in abnormal lithium ion de-lithiation and lithium insertion, affecting the capacity).

[0003] Pressurized tooling (such as Figure 1 The soft-pack battery (70) is mainly composed of a fastening screw (10), a fastening nut (20), an upper clamping plate (30), a lower clamping plate (40), a buffer spring (50), a screw rod base (60), and a soft-pack battery (70). The soft-pack battery (70) is placed between the upper clamping plate (30) and the lower clamping plate (40), and the fastening screw (10) and the fastening nut (20) cooperate to fix the soft-pack battery (70) to the screw rod base (60) and apply pressure. Although the structure is simple, the operation is inconvenient and the efficiency is low. Only one soft-pack battery (70) can be pressurized at a time. Utility Model Content

[0004] The main purpose of the utility model is to provide a soft-pack battery test pressurization tool, which is intended to be able to pressurize multiple soft-pack batteries at the same time to improve the test efficiency of a single pressurization.

[0005] In order to achieve the above-mentioned purpose, the utility model proposes a soft-pack battery cycle test pressurization tool, comprising:

[0006] Base;

[0007] A pressing plate assembly, the pressing plate assembly comprising a first pressing plate, a movable pressing plate and a second pressing plate sequentially arranged in the up-down direction, the first pressing plate being mounted on the upper surface of the base, the second pressing plate being movable up-down, the movable pressing plate being mounted between the first pressing plate and the second pressing plate, and the movable pressing plate being used to carry a soft-pack battery; and,

[0008] A pressurizing assembly includes a linear drive device connected to the base, having a drive portion that moves up and down, and the drive portion is connected to the second pressure plate to drive it to move up and down so that the soft-pack battery located on the movable pressure plate is subjected to pressure.

[0009] It can be further configured that the pressure plate assembly also includes a guide column and a connecting plate, the lower end of the guide column is connected to the base, the upper end of the guide column is connected to the linear drive device, the second pressure plate is installed on the lower side of the connecting plate, the connecting plate has a through hole, the through hole is movably mounted on the guide column, and the connecting plate is connected to the driving part so that the second pressure plate can move with the driving part via the connecting plate.

[0010] It can be further configured that there are multiple guide posts, the multiple guide posts are distributed around the periphery of the base, there are multiple through holes, and each guide post is penetrated by each through hole, so that the connecting plate slides along the guide posts.

[0011] It can be further configured that the movable pressing plate is provided with a plurality of them, the plurality of the movable pressing plates are stacked and arranged, and the upper side surface of each of the movable pressing plates is used to carry the soft-pack battery.

[0012] It can be further configured that the pressure plate assembly also includes a gasket, which is padded on the upper surface and / or lower surface of the soft-pack battery, and the gasket is used to buffer the soft-pack battery when it is pressurized.

[0013] It can be further configured that the gasket includes a box portion and a cover portion, the box portion has a receiving cavity for placing the soft-pack battery, and the cover portion covers the receiving cavity to enclose the soft-pack battery in the receiving cavity.

[0014] It can be further configured that the upper surface of the first pressing plate, the lower surface of the second pressing plate, and the upper and lower surfaces of the movable pressing plate are all provided with an insulating layer.

[0015] It can be further configured that the linear drive device includes a pneumatic drive device or a hydraulic drive device, the drive part includes an air cylinder or an oil cylinder, the linear drive device also includes a power source, a pipeline and a solenoid valve, the power source is connected to the air cylinder or the oil cylinder through the pipeline, so that the fluid generated by the power source enters the air cylinder or the oil cylinder through the pipeline to drive the second pressure plate to move up and down, and the solenoid valve is installed on the air cylinder or the oil cylinder to turn on and off the fluid in the cylinder or the oil cylinder.

[0016] It can be further configured that the linear drive device also includes a pressure regulating valve, and the pressure regulating valve is installed on the cylinder or the oil cylinder to adjust the flow rate of the fluid in the cylinder or the oil cylinder.

[0017] It can be further configured that the pressurizing component also includes a pressure sensor, and the pressure sensor is installed on the upper and lower surfaces of the movable pressure plate.

[0018] The technical solution of the utility model adopts a movable pressing plate installed between the first pressing plate and the second pressing plate, and soft-pack batteries are placed on the upper side of the movable pressing plate and the upper surface of the first pressing plate, so that two soft-pack batteries can be pressurized at the same time for pressure testing each time, thereby improving the test efficiency of single pressurization. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of a soft-pack battery pressurizing tool in the prior art;

[0021] Figure 2 This is a schematic diagram of the overall structure of the pressurizing tooling for the soft-pack battery cycle test of the utility model;

[0022] Figure 3 for Figure 2 A top view of the second pressing plate;

[0023] Figure 4 for Figure 2 Test image of the second pressure plate.

[0024] Description of Figure Numbers:

[0025] 1. Linear drive device; 11. Driving unit;

[0026] 2. Connecting plate; 21. Through hole;

[0027] 3. The second pressing plate;

[0028] 4. Guide column;

[0029] 5. Movable pressure plate;

[0030] 6. The first pressing plate;

[0031] 7. Base;

[0032] 8. Soft pack battery.

[0033] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0036] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0037] The utility model proposes a soft pack battery 8 cycle test pressurization tooling, such as Figures 2 to 4 As shown, it includes a base 7, a pressure plate assembly and a pressurizing assembly. The pressure plate assembly includes a first pressure plate 6, a movable pressure plate 5 and a second pressure plate 3 arranged in sequence in the up and down directions. The first pressure plate 6 is installed on the upper surface of the base 7, and the second pressure plate 3 can move up and down. The movable pressure plate 5 is installed between the first pressure plate 6 and the second pressure plate 3. The movable pressure plate 5 is used to carry the soft-pack battery 8. The pressurizing assembly includes a linear drive device 1 connected to the base 7, which has a driving part 11 that moves up and down. The driving part 11 is connected to the second pressure plate 3 to drive it to move up and down, so that the soft-pack battery 8 located on the movable pressure plate 5 is subjected to pressure.

[0038] The technical solution of the utility model adopts a movable pressing plate 5 installed between the first pressing plate 6 and the second pressing plate 3, and soft-pack batteries 8 are placed on the upper side of the movable pressing plate 5 and the upper surface of the first pressing plate 6, so that two soft-pack batteries 8 can be pressurized at the same time for pressure testing each time, thereby improving the test efficiency of single pressurization.

[0039] View Figure 3 and Figure 4In other embodiments, it can be further configured that the pressure plate assembly also includes a guide column 4 and a connecting plate 2, the lower end of the guide column 4 is connected to the base 7, the upper end of the guide column 4 is connected to the linear drive device 1, the second pressure plate 3 is installed on the lower side of the connecting plate 2, the connecting plate 2 has a through hole 21, the through hole 21 is movably sleeved on the guide column 4, and the connecting plate 2 is connected to the driving part 11 so that the second pressure plate 3 can move with the driving part 11 via the connecting plate 2.

[0040] In this way, the connecting plate 2 is supported by the guide column 4, and the connecting plate 2 moves up and down on the guide column 4 through the through hole 21 to maintain stability. As the connecting plate 2 moves, the second pressing plate 3 also moves up and down accordingly. In this way, the position of the second pressing plate 3 can be adjusted, and pressure on the soft-pack battery 8 can be applied or released, thereby improving the efficiency and stability of the working process.

[0041] In other embodiments, it can be further configured that a plurality of guide posts 4 are provided, the plurality of guide posts 4 are distributed around the periphery of the base 7 , a plurality of through holes 21 are provided, and each guide post 4 is passed through each through hole 21 , so that the connecting plate 2 slides along the guide posts 4 .

[0042] In this way, the guiding function of each guide column 4 ensures that the connecting plate 2 moves in the up and down directions and remains stable. The distribution of multiple guide columns 4 provides better support and balance, ensuring the stability and accuracy of the connecting plate 2 during movement.

[0043] In other embodiments, it can be further configured that a plurality of movable pressing plates 5 are provided, and the plurality of movable pressing plates 5 are stacked and arranged, and the upper side surface of each movable pressing plate 5 is used to carry the soft-pack battery 8.

[0044] It can be understood that, according to the spacing between the first pressure plate 6 and the second pressure plate 3, and the thickness of the soft-pack battery 8, multiple movable pressure plates 5 can be added to place the soft-pack battery 8 between adjacent movable pressure plates 5, thereby increasing the number of tests of the single-pressurized soft-pack battery 8. At the same time, each movable pressure plate 5 can be moved individually, increasing the flexibility of the installation of the soft-pack battery 8.

[0045] In other embodiments, it can be further configured that the pressure plate assembly also includes a gasket, which is padded on the upper surface and / or lower surface of the soft-pack battery 8, and the gasket is used to cushion the soft-pack battery 8 when it is pressurized.

[0046] In this way, when the soft-pack battery 8 is subjected to the pressure of the second pressure plate 3, it can reduce the direct pressure on the battery package, and the gasket can play a role in shock absorption and buffering, avoiding damage or deformation of the internal structure of the battery, and protecting the safety and performance of the battery. The selection and design of the gasket may depend on the specific application requirements and the design of the soft-pack battery 8. By adjusting the material, thickness and shape of the gasket, effective buffering and protection of the soft-pack battery 8 can be achieved, and its service life and safety can be improved.

[0047] In other embodiments, it can be further configured that the gasket includes a box portion and a cover portion, the box portion has a receiving cavity for placing the soft-pack battery 8, and the cover portion covers the receiving cavity to enclose the soft-pack battery 8 in the receiving cavity.

[0048] It is understandable that by placing the soft-pack battery 8 in the accommodating cavity of the box portion, the battery can be prevented from moving or twisting when subjected to external forces in the lateral or longitudinal direction. The closing of the cover portion can completely enclose the soft-pack battery 8 inside the gasket, further increasing the safety and stability of the battery. In addition, the size of the box portion and the cover portion is larger than the size of the soft-pack battery 8, wherein the accommodating cavity can be adapted to the specifications of the soft-pack battery 8, which can provide better fit and precision and prevent the soft-pack battery 8 from shifting during installation.

[0049] In other embodiments, it can be further configured that the upper surface of the first pressing plate 6 , the lower surface of the second pressing plate 3 , and the upper and lower surfaces of the movable pressing plate 5 are all provided with an insulating layer.

[0050] It can be understood that in order to extend the service life of the soft-pack battery 8 cycle test pressurization tooling, the first pressure plate 6, the second pressure plate 3 and the movable pressure plate 5 are all made of stainless steel, in order to prevent the soft-pack battery 8 from short-circuiting or overcurrent between the electrode sheet or the battery casing and the stainless steel plate, thereby reducing the damage and failure rate of the soft-pack battery 8.

[0051] In other embodiments, it can be further configured that the insulating layer includes insulating tape, and the insulating tape is bonded to the upper surface of the first pressing plate 6 , the lower surface of the second pressing plate 3 , and the upper and lower surfaces of the movable pressing plate 5 .

[0052] Specifically, in this embodiment, the insulating tape is Teflon tape, which has good corrosion resistance to most chemical substances and can remain stable in corrosive environments such as acid and alkali. This can prevent the soft-pack battery 8 from rupturing during the pressurization test, and the electrolyte inside from flowing out and contaminating the pressing plate, thereby causing pollution and corrosion to the pressing plate; Teflon tape has high wear resistance, is not easy to wear or break, and is suitable for long-term use. By bonding the insulating tape, the insulating tape can be easily and quickly replaced on the surface of the pressing plate.

[0053] In other embodiments, it can be further configured that the linear drive device 1 includes a pneumatic drive device or a hydraulic drive device, the drive part 11 includes a cylinder or an oil cylinder, the linear drive device 1 also includes a power source, a pipeline and a solenoid valve, the power source is connected to the cylinder or the oil cylinder through the pipeline, so that the fluid generated by the power source enters the cylinder or the oil cylinder through the pipeline to drive the second pressure plate 3 to move up and down, and the solenoid valve is installed in the cylinder or the oil cylinder to turn on and off the fluid in the cylinder or the oil cylinder.

[0054] It can be understood that both the air cylinder and the hydraulic cylinder convert the pressure of the fluid into linear motion. The air cylinder uses compressed air as the working medium, and the oil cylinder uses hydraulic oil as the working medium. In this embodiment, an air cylinder is used (the air cylinder can control very small movements with high precision and can maintain stable speed and force, so it is very suitable for high-precision control work.) The power source uses compressed air, and by opening the solenoid valve, the fluid is allowed to flow from the power source into the cylinder, thereby driving the second pressure plate 3 to move up and down. When the movement needs to be stopped, the solenoid valve is closed, the fluid flow is cut off, and the second pressure plate 3 stops moving.

[0055] In other embodiments, it can be further configured that the linear drive device 1 also includes a pressure regulating valve, and the pressure regulating valve is installed on the cylinder or the oil cylinder to adjust the flow rate of the fluid in the cylinder or the oil cylinder.

[0056] In this way, by adjusting the pressure regulating valve, the flow rate in the air cylinder or oil cylinder can be controlled, thereby controlling the pressure and stability applied by the second pressing plate 3 to the soft-pack battery 8. In this way, it can be ensured that the soft-pack battery 8 can obtain appropriate pressure under different working conditions, thereby improving the adjustment of different pressures required for different types of soft-pack batteries 8, thereby increasing the flexibility of the soft-pack battery cycle test tooling.

[0057] In order to prevent the soft-pack battery 8 from leaking due to excessive pressure during the test, or from being unable to effectively fix the soft-pack battery 8 due to too little pressure, in other embodiments, it can be further configured that the pressurizing component also includes a pressure sensor, and the pressure sensor is installed on the upper and lower surfaces of the movable pressing plate 5. In this way, by installing a pressure sensor on each of the upper and lower surfaces of the movable pressing plate 5, the pressure change can be monitored in real time when the soft-pack battery 8 is placed and tested, and the linear drive device 1 can be automatically operated by presetting the pressure to avoid causing the force on the soft-pack battery 8 to exceed the reasonable range.

[0058] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A soft pack battery cycle test pressurization tool, characterized in that: include: Base; A pressing plate assembly, the pressing plate assembly comprising a first pressing plate, a movable pressing plate and a second pressing plate sequentially arranged in the up-down direction, the first pressing plate being mounted on the upper surface of the base, the second pressing plate being movable up-down, the movable pressing plate being mounted between the first pressing plate and the second pressing plate, and the movable pressing plate being used to carry a soft-pack battery; as well as, A pressurizing assembly includes a linear drive device connected to the base, having a drive portion that moves up and down, and the drive portion is connected to the second pressure plate to drive it to move up and down so that the soft-pack battery located on the movable pressure plate is subjected to pressure.

2. The soft pack battery cycle test pressurization tooling according to claim 1, characterized in that: The pressure plate assembly also includes a guide column and a connecting plate, the lower end of the guide column is connected to the base, the upper end of the guide column is connected to the linear drive device, the second pressure plate is installed on the lower side of the connecting plate, the connecting plate has a through hole, and the through hole is movably mounted on the guide column, and the connecting plate is connected to the driving part so that the second pressure plate can move with the driving part via the connecting plate.

3. The soft pack battery cycle test pressurization tooling according to claim 2, characterized in that: There are a plurality of guide posts distributed around the base, and there are a plurality of through holes, each guide post is passed through each through hole, so that the connecting plate slides along the guide posts.

4. The soft pack battery cycle test pressurization tooling according to claim 1, characterized in that: There are multiple movable pressing plates, which are stacked and arranged, and the upper side of each movable pressing plate is used to carry soft-pack batteries.

5. The soft pack battery cycle test pressurization tooling according to claim 1, characterized in that: The pressure plate assembly further includes a gasket, which is arranged on the upper surface and / or the lower surface of the soft-pack battery, and is used to buffer the soft-pack battery when it is under pressure.

6. The soft pack battery cycle test pressurization tooling according to claim 5, characterized in that: The gasket includes a box portion and a cover portion, wherein the box portion has a receiving cavity for placing the soft-pack battery, and the cover portion covers the receiving cavity so that the soft-pack battery is enclosed in the receiving cavity.

7. The soft pack battery cycle test pressurization tooling according to claim 1, characterized in that: The upper surface of the first pressing plate, the lower surface of the second pressing plate, and the upper and lower surfaces of the movable pressing plate are all provided with an insulating layer.

8. The soft pack battery cycle test pressurization tooling according to claim 1, characterized in that: The linear drive device includes a pneumatic drive device or a hydraulic drive device, the drive part includes an air cylinder or an oil cylinder, and the linear drive device also includes a power source, a pipeline and an electromagnetic valve. The power source is connected to the air cylinder or the oil cylinder through the pipeline, so that the fluid generated by the power source enters the air cylinder or the oil cylinder through the pipeline to drive the second pressure plate to move up and down. The electromagnetic valve is installed on the air cylinder or the oil cylinder to turn on and off the fluid in the cylinder or the oil cylinder.

9. The soft pack battery cycle test pressurization tooling according to claim 8, characterized in that: The linear drive device further comprises a pressure regulating valve, which is installed on the air cylinder or the oil cylinder to regulate the flow rate of the fluid in the air cylinder or the oil cylinder.

10. The soft pack battery cycle test pressurization tooling according to claim 8, characterized in that: The pressurizing assembly further comprises a pressure sensor, and the pressure sensor is mounted on the upper and lower surfaces of the movable pressing plate.

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