Battery restraining method, battery charge-discharge test method and battery charge-discharge system

Abstract

This invention discloses a battery restraint method, a battery charge / discharge test method, and a battery charge / discharge system. The battery restraint method includes: placing a battery into a vacuum bag; evacuating the vacuum bag and sealing it; placing the sealed vacuum bag into a container; sealing the container; and then injecting liquid into the container, the liquid applying pressure to the surface of the vacuum bag. By applying pressure to the surface of the vacuum bag through liquid pressure, the vacuum bag adheres tightly to the surface of the battery, thereby applying uniform and stable pressure to the battery surface.

Description

Technical Field

[0001] This invention relates to the field of battery formation and capacity testing technology, and more specifically, to a battery restraint method, a battery charge and discharge testing method, and a battery charge and discharge system. Background Technology

[0002] In related technologies, during the solid-state battery formation process, complex electrochemical reactions occur inside the battery, generating a certain amount of gas that causes the battery to swell. Therefore, a large pressure is required to cover the battery surface. For solid-state batteries, the surface pressure requirement is even higher. Traditional machinery often uses electric cylinders, hydraulic cylinders, etc. However, large-tonnage electric cylinders and hydraulic cylinders are difficult to precisely control the pressing accuracy and dynamically adjust, and the pressure is prone to fluctuation, making it impossible to achieve the required precise control.

[0003] Therefore, a new technical solution is needed to solve the above-mentioned technical problems. Summary of the Invention

[0004] One object of the present invention is to provide a new technical solution for a battery restraint method.

[0005] According to a first aspect of the present invention, a battery restraint method is provided. The battery restraint method includes: Place the battery into a vacuum bag; Vacuum the vacuum bag; The vacuum bag is then sealed after vacuuming. Place the sealed vacuum bag into the canister; The container is sealed, and then liquid is injected into the container, which applies pressure to the surface of the vacuum bag.

[0006] Optionally, sealing the vacuum bag after vacuuming includes sealing the vacuum bag by abutting the seals on the two mounting pieces.

[0007] Optionally, the battery is subjected to a capacity test via a power module. After the capacity test is completed, some of the liquid in the tank is drained, the vacuum bag is removed, and the vacuum bag is dried.

[0008] Optionally, after the sealed vacuum bag is placed into the container, the vacuum bag is positioned.

[0009] Optionally, injecting liquid into the tank includes: first filling the tank with atmospheric pressure liquid, then closing the atmospheric pressure pipeline, and opening and switching to the high pressure pipeline to pressurize the liquid in the tank.

[0010] Optionally, the power module performs a capacity test on the battery, and during the capacity test, the temperature inside the tank is monitored in real time; the liquid inside the tank flows into a temperature control system, is processed by the temperature control system, and then flows back into the tank from the temperature control system.

[0011] Optionally, the hydraulic pressure of the liquid inside the tank is greater than or equal to 30 MPa.

[0012] According to a second aspect of the present invention, a battery charge-discharge test method is provided, wherein the battery is constrained using the battery restraint method of the above embodiment, and then the battery is electrically connected to a power module.

[0013] Optionally, after the vacuum bag is vacuumed, the vacuum bag is placed tightly against the surface of the battery, and the conductive parts inside the vacuum bag are electrically connected to the battery's tabs. The sealed vacuum bag is placed inside the container, and the battery is electrically connected to the power module via a conductive component.

[0014] According to a third aspect of the present invention, a battery charging and discharging system applying the battery charging and discharging test method described in the above embodiments is provided.

[0015] One of the technical advantages of this application is that by applying pressure to the surface of the vacuum bag through liquid pressure, the vacuum bag adheres tightly to the surface of the battery, thereby enabling the application of uniform and stable pressure to the surface of the battery.

[0016] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the invention and, together with their description, serve to explain the principles of the invention.

[0018] Figure 1 This is a flowchart of a battery restraint method according to an embodiment of this application.

[0019] Figure 2 This is a schematic diagram of the battery formation and capacity testing process according to an embodiment of this application.

[0020] Figure 3 This is a schematic diagram of the structure of a tray mechanism according to an embodiment of this application.

[0021] Figure 4 yes Figure 3 The enlarged view of point A is shown.

[0022] Figure 5 This is a schematic diagram of the pallet mechanism according to another embodiment of this application.

[0023] Figure 6 yes Figure 5 The enlarged view at point B is shown.

[0024] Figure 7 This is a partial structural schematic diagram of a pallet mechanism according to an embodiment of this application.

[0025] Figure 8 This is a schematic diagram of the restraint mechanism according to an embodiment of this application.

[0026] Figure 9 yes Figure 8 The enlarged view at point C is shown.

[0027] Figure 10 This is a schematic diagram of the structure of a battery formation and capacity testing device according to an embodiment of this application.

[0028] Figure label: 1. Tray mechanism; 11. First mounting base; 111. Positioning hole; 112. Electrical interface; 12. Mounting component; 121. Mounting body; 1211. Sliding hole; 122. Sealing component; 1221. First guide surface; 123. Guide part; 13. Vacuum bag; 131. First open end; 14. Sliding rod; 151. Screw; 152. Nut; 16. Conductive component; 2. Restraint mechanism; 21. Tank body; 211. Second open end; 22. Pressure plate; 23. End cover; 24. Slide rail; 25. Sliding component; 26. Electrical connection part; 27. Positioning rod; 28. Second mounting base; 29. ​​Support part; 3. Vacuum mechanism; 4. Battery; 5. Power module; 6. Loading position; 7. Conveying mechanism; 8. Drying mechanism; 9. Material conveying mechanism; 10. Temperature control system; 20. Pipeline. Detailed Implementation

[0029] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0030] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0031] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0032] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0034] According to one embodiment of this application, a battery restraint method is provided. For example... Figure 1 and Figure 2 As shown, the battery restraint method includes: S100. Place battery 4 into vacuum bag 13. Transport battery 4 to loading position 6, and place battery 4 into vacuum bag 13 by a robotic arm or other material handling mechanism.

[0035] S200. Vacuum bag 13 is evacuated. A vacuum pump or other vacuum mechanism is used to evacuate vacuum bag 13, which is placed tightly against the surface of battery 4. The plug of the vacuum pump is inserted into vacuum bag 13 from the first opening end 131 to perform the vacuum evacuation operation.

[0036] S300. Seal the vacuum bag 13 after vacuuming. Seal the vacuum bag 13 after vacuuming so that the vacuum bag 13 is in close contact with the surface of the battery 4.

[0037] S400. Place the sealed vacuum bag 13 into the container 21. The conductive element 16 is electrically connected to the power module 5. The container 21 has an inner cavity. After evacuating the vacuum bag 13 containing the battery 4, the vacuum bag 13 is transferred into the inner cavity of the container 21. One end of the conductive element 16 passes through the vacuum bag 13, and a seal is formed between the conductive element 16 and the vacuum bag 13. The conductive element 16 can be electrically connected to the external power module 5, so that the battery 4 inside the vacuum bag 13 can be electrically connected to the external power module 5 through the conductive element 16, and the power module 5 can charge and discharge the battery 4.

[0038] S500: Seal the canister 21, then inject liquid into the canister 21, the liquid applying pressure to the surface of the vacuum bag 13. After the vacuum bag 13 is placed in the canister 21, the conductive component 16 is electrically connected to the power module 5, and then the canister 21 is sealed. Then, liquid is injected into the canister 21, the vacuum bag 13 is immersed in the liquid, the liquid can apply pressure to the surface of the vacuum bag 13, and thus can apply pressure to the surface of the battery 4. The canister 21 has an inner cavity, and the inner cavity of the canister 21 is an isostatic cavity. The vacuum bag 13 is in the inner cavity of the canister 21, and the liquid can uniformly pressurize the battery 4 inside the vacuum bag 13. It is only necessary to consider whether the size of the isostatic cavity can cover the entire vacuum bag 13. The structure is simpler and the operation is more convenient. Compared with the traditional mechanical pressing method, there is no need to consider the compatibility, interference, and stroke problems between various processed parts.

[0039] In this example, the liquid injected into tank 21 can be deionized water. Deionized water has insulating properties, ensuring that there is no risk of short circuit and fire during the overall formation process. Of course, the specific composition of the liquid can be determined by those skilled in the art based on the actual situation, and is not specifically limited here.

[0040] In this example, pressure is applied to the surface of the vacuum bag 13 by the pressure of the liquid. Because the vacuum bag 13 is in close contact with the surface of the battery 4, a uniform and stable pressure can be applied to the surface of the battery 4 by the liquid. Furthermore, the pressure applied to the surface of the battery 4 can be precisely adjusted by controlling the liquid pressure, making it suitable for different models of batteries 4. The liquid pressure can be detected by a hydraulic sensor.

[0041] By immersing the battery 4 in liquid pressure, uniform and accurate overall pressure is ensured, solving the problem of uneven pressure at different positions in traditional mechanical clamps. The pressure can be precisely controlled, making the overall pressure stable and controllable, with an overall accuracy of ±1% or even higher. The device reduces debugging difficulty and installation time, avoiding the problems of numerous parts, difficult manufacturing, and difficult maintenance associated with traditional clamps, effectively reducing equipment costs. It is compatible with various types and sizes of batteries 4; only the size of the inner cavity of the tank 21 needs to be considered to ensure it covers the entire pallet mechanism 1. Using hydraulic pressure to press the battery 4 further improves maintainability, reliability, and stability. The power source cost is lower; utilizing the incompressible property of liquids, the tank 21 is first filled with atmospheric pressure water, then the atmospheric pressure pipeline is closed, and the high-pressure pipeline is opened and switched to pressurize the liquid inside the tank 21, achieving extremely high pressure.

[0042] In this example, the hydraulic pressure of the liquid inside the tank 21 can be greater than or equal to 30 MPa. Those skilled in the art can determine this according to the actual situation, and no specific limitation is made here.

[0043] In one example, before sealing the vacuum bag 13 containing the battery 4, the plug of the vacuum mechanism 3 is inserted into the vacuum bag 13. This operation avoids problems such as difficulty in inserting the plug of the vacuum mechanism 3 into the vacuum bag 13 after the first opening 131 is sealed.

[0044] like Figure 7 As shown, in this example, the vacuum bag 13 has a first opening 131, through which the battery 4 can be placed. After the battery 4 is placed in the vacuum bag 13, the first opening 131 needs to be sealed. Before sealing the vacuum bag 13, the plug of the vacuum mechanism 3 can be inserted into the vacuum bag 13 through the second opening 211, and then the first opening 131 can be sealed. The outer wall of the plug is also sealed to the inner wall of the second opening 211. After the vacuuming operation is completed, the plug of the vacuum mechanism 3 is removed from the vacuum bag 13.

[0045] In one example, the power module 5 performs a capacity-matching operation on the battery 4, and after the capacity-matching operation is completed, some of the liquid in the tank 21 is discharged.

[0046] In this example, after the battery 4 has completed the capacity testing, it is necessary to depressurize the tank 21, that is, to drain some of the liquid inside the tank 21, and then open the second opening end 211 of the tank 21 to remove the battery 4 from the tank 21.

[0047] In this design, only a portion of the liquid in tank 21 can be discharged, while some liquid can remain in tank 21. For example, the liquid level only needs to be lower than the second opening end 211, which helps to improve the injection efficiency during the next injection. It should be noted that tank 21 is provided with a drain port, which is connected to the inner cavity of tank 21 and is used to drain the liquid in the inner cavity.

[0048] In one example, injecting liquid into the tank 21 includes: first filling the tank 21 with atmospheric pressure liquid, then closing the atmospheric pressure pipeline, opening and switching to the high pressure pipeline to pressurize the liquid in the tank 21. Utilizing the incompressible property of liquid, high-pressure liquid is input into the tank 21 via a booster pump, and the high-pressure liquid can apply uniform pressure to the surface of the battery 4.

[0049] In this example, the side wall of the tank 21 is provided with two injection ports, namely the first injection port and the second injection port. The first and second injection ports are respectively connected to the inner cavity of the tank 21 and are both equipped with valves. The first injection port flows with normal pressure liquid, and the second injection port flows with high pressure liquid. That is, the first injection port is connected to a low-pressure pump through a pipe, and the second injection port is connected to a high-pressure pump through a pipe. When the battery 4 is placed in the tank 21, there is air inside the tank 21. At this time, a low-pressure, high-flow-rate injection method is used, with the low-pressure pump delivering liquid to the first injection port to quickly fill the tank 21. Once the tank 21 is full of liquid, the valve of the first injection port is closed, and the valve of the second injection port is opened. High pressure liquid is then used to connect with the liquid inside the tank 21, and the high-pressure pump delivers liquid to the second injection port at a small flow rate to create high pressure in the liquid inside the tank 21.

[0050] In one example, the power module 5 performs a capacity-forming operation on the battery 4, and the temperature inside the tank 21 is monitored in real time during the capacity-forming operation of the battery 4.

[0051] In this example, battery 4 generates heat during charging and discharging. To ensure the effective capacity formation of battery 4, its ambient temperature needs to be maintained within a preset range. For example, a temperature sensor can be used to monitor the temperature of the liquid inside tank 21 in real time. Based on the measured actual temperature, the temperature of the liquid inside tank 21 is adjusted in real time to maintain it within the preset range.

[0052] In this example, the liquid in the tank 21 flows into the temperature control system 10, is processed by the temperature control system 10, and then flows back into the tank 21. The tank 21 is connected to the temperature control system 10 via a pipe 20. The liquid in the tank 21 flows into the temperature control system 10, which processes the liquid according to the measured actual temperature, for example, by heating or cooling it. The processed liquid then flows back into the tank 21 from the temperature control system 10, thereby regulating the temperature of the liquid in the tank 21.

[0053] It should be noted that the tank 21 is connected to the temperature control system 10 through two pipes 20, one pipe 20 for liquid outlet and the other pipe 20 for liquid inlet, so as to achieve liquid circulation. The temperature control system 10 includes a heater and a chiller, etc.

[0054] like Figures 3 to 7 As shown, in one example, the restraint device includes a tray mechanism 1, which includes at least one vacuum bag 13. The battery 4 tray mechanism 1 also includes a first mounting base 11 and mounting members 12, the mounting members 12 being slidably disposed on the first mounting base 11, and at least two mounting members 12 being spaced apart. The vacuum bag 13 has a first open end 131, and opposite sides of the first open end 131 of the vacuum bag 13 are respectively connected to two adjacent mounting members 12. The two adjacent mounting members 12 can abut against each other and cover the first open end 131 to seal the first open end 131.

[0055] like Figure 3 and Figure 4 As shown, in this example, the opposite sides of the first opening end 131 of the vacuum bag 13 are respectively connected to two adjacent mounting members 12. The two adjacent mounting members 12 can move closer to each other and fit together, and the mounting members 12 can cover the first opening end 131, thereby sealing the first opening end 131 of the vacuum bag 13. For example, two mounting members 12 can be provided, and one vacuum bag 13 can be provided, or the number of mounting members 12 can be more than two, and multiple vacuum bags 13 can be provided accordingly, with one vacuum bag 13 connected between every two adjacent mounting members 12. Each vacuum bag 13 can hold one battery 4. By providing multiple vacuum bags 13, multiple batteries 4 can be placed, and multiple batteries 4 can be subjected to capacity testing.

[0056] like Figure 5 and Figure 6 As shown, the battery 4 can be clamped by mechanical grippers and placed into the vacuum bag 13 from the first opening end 131. Then, the first opening end 131 of the vacuum bag 13 is sealed by the mounting member 12. There is a gap between two adjacent vacuum bags 13, for example, it can be separated by the mounting member 12 between two adjacent vacuum bags 13, so that in the high-pressure liquid, the pressure output by the hydraulic contact battery 4 can be uniformly applied to all surfaces of the battery 4.

[0057] like Figure 3 and Figure 4 As shown, in this example, a slide bar 14 is mounted on the mounting base, and multiple mounting components 12 are slidably connected to the slide bar 14 and can slide along the slide bar 14, allowing the multiple mounting components 12 to move closer to or further away from each other. This structure is simple and helps reduce the number of parts. Multiple slide bars 14 can be provided, with each mounting component 12 slidably connected to multiple slide bars 14, thereby improving the stability of the sliding of the mounting component 12.

[0058] In one example, such as Figure 7 As shown, the mounting component 12 includes a mounting body 121, each mounting body 121 having a sliding hole 1211, through which sliding rods 14 are sequentially inserted. Two sliding rods 14 can be arranged in parallel, with sliding holes 1211 respectively on opposite sides of the mounting component 12, allowing the two sliding rods 14 to pass through two separate sliding holes 1211. Alternatively, a slider can be provided on the mounting component 12, allowing the mounting component 12 to be slidably connected to the sliding rods 14 via the slider. Alternatively, a slide rail 24 can be provided on the mounting base, allowing the mounting component 12 to slide slidably on the slide rail 24. Of course, the specific sliding structure between the mounting component 12 and the mounting base can be determined by those skilled in the art based on actual conditions, and is not specifically limited here.

[0059] It should be noted that the mounting body 121 can be a plate structure, and the mounting body 121 can be made of materials such as plastic or metal. Those skilled in the art can determine the material according to the actual situation, and no specific limitation is made here.

[0060] In this example, the battery tray mechanism 1 also includes a first drive member, which is tractively connected to the mounting member 12 and can move the mounting member 12. That is, the first drive member can move the mounting members 12 to move closer to or further away from each other to seal or open the vacuum bag 13.

[0061] Because a vacuum bag 13 connects two adjacent mounting pieces 12, the first driving member can be driven to the mounting piece 12 located at the first end. When it is necessary to move multiple mounting pieces 12 away from each other, the mounting piece 12 at the first end can be moved away from the mounting piece 12 at the second end. Under the traction of the vacuum bag 13, multiple mounting pieces 12 can be pulled to move away from each other. When it is necessary to move multiple mounting pieces 12 closer together, the mounting piece 12 at the first end can be moved towards the mounting piece 12 at the second end, and the multiple mounting pieces 12 can be brought into contact with each other and pushed sequentially to achieve the goal of multiple mounting pieces 12 moving closer together.

[0062] It should be noted that there are two first driving components, which are respectively connected to the mounting components 12 at both ends. That is, the two first driving components are respectively connected to the mounting components 12 at the first end and the second end, and the two first driving components can be driven synchronously, thereby improving work efficiency.

[0063] like Figure 3 and Figure 5 As shown, the first driving component can be a lead screw structure, that is, the first driving component includes a screw 151 and a nut 152, with the nut 152 screwed onto the screw 151. The screw 151 is slidably connected to the mounting base, and one end of the screw 151 is drively connected to the mounting component 12. By rotating the nut 152, the screw 151 can be moved, thereby moving the mounting component 12. This first driving component has a simple structure, is a purely mechanical structure, does not require strict waterproofing treatment, and has a low cost.

[0064] Of course, the specific structure of the first driving component can be determined by those skilled in the art according to the actual situation, as long as it can drive the mounting component 12 to move, and no specific limitation is made here.

[0065] like Figure 7 As shown, in this example, the mounting component 12 also includes a sealing component 122, which can be adhered to the mounting body 121. The opposite sides of the first opening end 131 of the vacuum bag 13 can be respectively connected to the sealing components 122 on both sides. The two sealing components 122 are located on opposite sides of the opening end. For example, the vacuum bag 13 can be adhered to the sealing component 122.

[0066] When the first opening 131 of the vacuum bag 13 needs to be sealed, the two mounting pieces 12 approach each other, that is, the two sealing pieces 122 can approach each other and fit tightly. At the same time, the two sealing pieces 122 can also cover the first opening 131, thereby sealing the first opening 131. When the vacuum bag 13 needs to be opened, the two mounting pieces 12 can move away from each other, that is, the sealing pieces 122 can move away from each other, thereby allowing the first opening 131 of the vacuum bag 13 to be opened. Specifically, when the vacuum bag 13 needs to be opened, gas can be injected into the vacuum bag 13 to break the vacuum, thereby facilitating the separation of the two sealing pieces 122.

[0067] It should be noted that the seal 122 can be made of materials that can be used for sealing, such as silicone. Those skilled in the art can determine the material according to the actual situation, and no specific limitation is made here.

[0068] like Figure 7 As shown, in this example, the seal 122 is provided with a first guide surface 1221, which is an inclined surface. The first guide surface 1221 gradually approaches the other seal 122 from top to bottom. Both seals 122 have a first guide surface 1221 on their opposing sides. After the two seals 122 are tightly sealed against each other at the first opening end 131, the two first guide surfaces 1221 can form a guide groove. The guide groove has a V-shaped structure, and the two inclined surfaces are the sidewalls of the guide groove. That is, the two opposing sidewalls of the guide groove gradually approach each other from top to bottom. The top is the opening of the guide groove, and the bottom is the bottom wall of the guide groove. The plug of the vacuum mechanism 3 can enter the guide groove through the opening, and the V-shaped guide groove has a guiding function. Through the guiding function of the guide groove, the plug can be inserted into the vacuum bag 13 more conveniently.

[0069] In one example, after the sealed vacuum bag 13 is placed into the container 21, the vacuum bag 13 is positioned.

[0070] In this example, a vacuum bag 13 is disposed on a first mounting base 11, which is provided with a positioning part for positioning the mounting base. That is, the battery 4 is sealed inside the vacuum bag 13, and then the tray mechanism 1 can be conveyed into the tank 21. When the tray mechanism 1 is placed into the tank 21, the positioning part on the first mounting base 11 can be used to position and fix the first mounting base 11, thereby positioning the vacuum bag 13 and the battery 4.

[0071] The positioning part can be a positioning hole 111. For example... Figure 9As shown, the tank body 21 is provided with a positioning rod 27 corresponding to the positioning hole 111. The positioning rod 27 can be inserted into the positioning hole 111 to achieve the positioning operation. Multiple positioning holes 111 can be provided to improve the positioning effect. For example, the mounting base has a square frame structure, with positioning holes 111 at each of the four corners. Of course, the specific distribution of the positioning holes 111 can be determined by those skilled in the art according to the actual situation, and is not specifically limited here.

[0072] like Figure 3 and Figure 4 As shown, the mounting base also includes an electrical interface 112, which is suitable for electrical connection with the conductive element 16 on the vacuum bag 13. The conductive element 16 is partially disposed inside the vacuum bag 13; for example, it can be partially embedded in the inner wall of the vacuum bag 13, or it can be fixed to the inner wall of the vacuum bag 13 by adhesive or other means. After the battery 4 is placed inside the vacuum bag 13, the tabs of the battery 4 can make electrical contact with the conductive element 16. One end of the conductive element 16 passes through the inner wall of the vacuum bag 13 and extends to the outside of the vacuum bag 13, so that the conductive element 16 can be electrically connected to the electrical connection port, allowing the battery 4 to be electrically connected to the power module 5 through the electrical connection port. The conductive element 16 is sealed to the vacuum bag 13, with one end passing through the inner wall of the vacuum bag 13.

[0073] The conductive element 16 can be made of conductive materials such as copper. Of course, the specific material of the conductive element 16 can be determined by those skilled in the art based on the actual situation, and no specific limitation is made here.

[0074] In this example, multiple conductive elements 16 can be provided, each capable of making electrical contact with at least the positive and negative tabs of the battery 4. Multiple sets of electrical interfaces 112 are provided, corresponding to multiple vacuum bags 13. Each set includes a positive interface electrically connected to the positive tab and a negative interface electrically connected to the negative tab.

[0075] In this example, such as Figure 7 As shown, the mounting component 12 is also provided with a guide portion 123, which is located on one side of the vacuum bag 13. The guide portion 123 is used to guide the battery 4 when it is placed into the vacuum bag 13, so as to facilitate the smooth placement of the battery 4 into the vacuum bag 13. That is, the guide portion 123 can be used to guide the robot when the robot puts the battery 4 into or takes the battery 4 out of the vacuum bag 13.

[0076] like Figure 7As shown, the guide portion 123 can be a cylindrical structure, and a second guide surface is provided on the guide portion 123. When the battery 4 is placed in, the battery 4 can enter the vacuum bag 13 along the second guide surface. For example, the guide portion 123 can be provided with a cone, and the side of the cone is the second guide surface. By using the side of the cone as the second guide surface, it is not necessary to specially adjust the position of the guide portion 123 when assembling it, which can improve the ease of assembly of the guide portion 123. The guide portion 123 can be screwed or snapped onto the mounting part 12, or the guide portion 123 and the mounting part 12 can be integrally formed. Those skilled in the art can decide according to the actual situation, and no specific limitation is made here.

[0077] It should be noted that multiple guide portions 123 can be provided, and multiple guide portions 123 can be provided at intervals on the mounting member 12 along the length direction of the first opening end 131.

[0078] like Figure 8 As shown, in one example, the restraint device further includes a restraint mechanism 2, which includes a container 21. The container 21 has an inner cavity and a second open end 211, which communicates with the inner cavity. The battery 4 is placed in a vacuum bag 13 of the tray mechanism 1. After the vacuum bag 13 is evacuated, the tray mechanism 1 is placed into the inner cavity of the container 21 through the second open end 211. Then the second open end 211 is sealed, and liquid is then introduced into the inner cavity. The vacuum bag 13 is immersed in the liquid, which can apply pressure evenly and stably to the surface of the battery 4. By controlling the preset value of the liquid pressure in the inner cavity, a high degree of consistency between the batteries 4 is ensured.

[0079] like Figure 8 As shown, it should be noted that the restraint mechanism 2 also includes a second mounting base 28, on which the tank 21 can be mounted. The power module 5 is also mounted on the second mounting base 28. The second mounting base 28 can be made of materials such as aluminum alloy or stainless steel, which can be determined by those skilled in the art according to the actual situation, and is not specifically limited here.

[0080] In this example, such as Figure 8 As shown, the restraint mechanism 2 also includes an end cap 23. After the battery 4 is placed in the canister 21, the end cap 23 can move to the position of the second opening end 211 and seal the second opening end 211. One end of the end cap 23 can be inserted into the second opening end 211, and the outer wall of the end cap 23 inserted into the second opening end 211 can make close contact with the inner wall of the second opening end 211, thereby achieving a sealing effect.

[0081] In this example, the restraint mechanism 2 also includes a second driving member for moving the end cap 23. The second driving member is tractively connected to the end cap 23 and can move the end cap 23 closer to or away from the second opening end 211 to seal or open the second opening end 211. That is, after the formation and capacity operation is completed or when it is necessary to remove the battery 4 from the can 21, the second driving member can move the end cap 23 away from the opening end and away from the opening end, thereby avoiding the battery 4 and the feeding mechanism 9 for removing the battery 4. When it is necessary to seal the second opening end 211, the second driving member can move the end cap 23 closer to the second opening end 211 and seal the second opening end 211. The second driving member can be mounted on the second mounting base 28.

[0082] In this example, the second drive member can rotate and move the end cap 23. That is, after the formation and capacity test is completed or when the battery 4 needs to be removed from the container 21, the second drive member can first move the end cap 23 away from the second opening end 211, for example, move the end cap 23 forward to disengage it from the second opening end 211, and then rotate the end cap 23 so that the end cap 23 is completely misaligned with the second opening end 211, for example, the end cap 23 is located on one radial side of the second opening end 211 to avoid the battery 4 and the feeding mechanism for removing the battery 4. When it is necessary to seal the second opening end 211, the second drive member can first rotate the end cap 23 so that the end cap 23 is coaxial with the second opening end 211, and then move the end cap 23 toward the second opening end 211, for example, move the end cap 23 backward to completely seal the second opening end 211.

[0083] It should be noted that the second driving component may include a driving rod and a driving source. One end of the driving rod is connected to the end cover 23, and the other end is driven to the driving source. The driving source can control the movement of the end cover 23 through the driving rod. For example, the driving source may be a motor or a cylinder, or a combination of multiple motors or cylinders. Those skilled in the art can determine the specific configuration based on the actual situation, and no specific limitation is made here. The driving source includes a rotational driving component and a locating driving component. The rotational driving component can drive the end cover 23 to rotate, and the locating driving component can drive the end cover 23 to move. For example, one end of the driving rod is connected to the end cover 23, the rotational driving component is driven to the driving rod to rotate, and the output end of the locating driving component is connected to the rotational driving component to move, thereby driving the end cover 23 to move. Of course, those skilled in the art can determine the specific arrangement of the rotational driving component and the locating driving component based on the actual situation, and no specific limitation is made here.

[0084] like Figure 8As shown, in this example, the restraint mechanism 2 also includes a pressure plate 22. When the end cap 23 seals the second opening end 211, the pressure plate 22 can abut against the outer wall of the end cap 23 to improve the stability and reliability of the end cap 23 sealing the second opening end 211. When the pressure in the tank 21 is high, the end cap 23 can withstand a large hydraulic pressure, and the end cap 23 can stably and reliably seal the second opening end 211. Specifically, the first end of the end cap 23 can be inserted into the second opening end 211, and the pressure plate 22 can abut against the second end of the end cap 23 that is away from the first end.

[0085] like Figure 8 As shown, in this example, the restraint mechanism 2 also includes a slide rail 24, to which the pressure plate 22 is slidably connected. The slide rail 24 can be mounted on the second mounting base 28. The pressure plate 22 is slidably connected to the slide rail 24 via a slider 25, that is, the slider 25 is slidably connected to the slide rail 24, and the pressure plate 22 is mounted on the slider 25. The slider 25 can drive the pressure plate 22 to move left and right. That is, after the formation and capacity testing is completed or when it is necessary to remove the battery 4 from the inner cavity, the pressure plate 22 moves to the right to move away from the end cap 23, so that the second drive member can drive the end cap 23 away from the second opening end 211, wherein the pressure plate 22 is located on one side of the second opening end 211 in the radial direction to avoid the battery 4 and the material handling mechanism for removing the battery 4. When it is necessary to seal the opening end, the second drive member can drive the end cap 23 to seal the second opening end 211, and then the pressure plate 22 moves to the left to abut against the end cap 23.

[0086] In this example, such as Figure 9 As shown, the restraint mechanism 2 also includes an electrical connection part 26, which is disposed within the inner cavity of the tank 21. The electrical connection part 26 can be electrically connected to the power module 5. When the battery 4 is placed in the tank 21, the electrical connection part 26 can be electrically connected to the electrical interface 112 on the tray mechanism 1, so that the battery 4 can be electrically connected to the power module 5 through the electrical connection part 26 for capacity testing. Multiple electrical connection parts 26 are provided, each corresponding to one of the multiple batteries 4.

[0087] It should be noted that the part of the electrical connection 26 that is electrically connected to the electrical interface 112 is provided with a sealed and waterproof structure to avoid short circuits.

[0088] In this example, a support portion 29 is provided in the inner cavity of the tank 21. For example, the side wall of the tank 21 protrudes into the inner cavity to form a boss, thereby constituting the support portion 29. An electrical connection portion 26 may be provided on the support portion 29, and the tray mechanism 1 may be fixedly placed on the support portion 29. A positioning rod 27 may be provided on the support portion 29.

[0089] It should be noted that the electrical connection part 26 includes a copper core and a mounting block. The copper core is embedded in the mounting block, which is connected to the tank body 21. The tank body 21 has a connection hole, through which the copper core passes and extends into the inner cavity of the tank body 21. A sealing ring is provided between the mounting block and the side wall of the tank body 21 to seal the connection hole. The outer periphery of the copper core and the inner wall of the mounting block are respectively provided with multiple grooves and protrusions. The protrusions engage with the grooves, thereby improving the stability of the copper core connection to the mounting block and preventing the copper core from coming out under high pressure.

[0090] According to another embodiment of this application, a battery charge-discharge test method is provided. The battery 4 is restrained using the battery restraint method described in the above embodiment. The battery 4 is electrically connected to a power module 5, and the power module 5 performs charge-discharge operations on the battery 4.

[0091] In this example, a conductive element 16 is provided inside the vacuum bag 13. The battery 4 is placed inside the vacuum bag 13, and the tabs of the battery 4 can contact the conductive element 16. That is, there are at least two conductive elements 16, which respectively contact the positive and negative tabs of the battery 4. After the vacuum bag 13 is evacuated, the inner wall of the vacuum bag 13 can tightly adhere to the surface of the battery 4, thereby pressing the tabs and the conductive element 16 together, ensuring a stable and tight fit between the tabs and the conductive element 16, thus guaranteeing circuit continuity.

[0092] The sealed vacuum bag 13 is placed inside the canister 21, and the battery is electrically connected to the power module 5 via the conductive element 16. The first mounting base 11 has multiple electrical interfaces 112, and the conductive element 16 is electrically connected to the electrical interfaces 112. The first mounting base 11 has multiple electrical interfaces 112 that are connected to a common terminal. The canister 21 has an electrical connection part 26, which is electrically connected to the power module 5, and the common terminal is electrically connected to the electrical connection part 26. After the canister 21 is sealed, liquid is injected into the canister 21. Utilizing the incompressible property of liquid, a booster pump outputs high-pressure liquid into the canister 21 to restrain the battery 4. Then, the power module 5 performs a charge-discharge test on the battery 4.

[0093] According to another embodiment of this application, a battery charging and discharging system that applies the battery charging and discharging test method described in the above embodiments is provided.

[0094] like Figure 10 As shown, the battery charging and discharging system includes a restraint mechanism 2. Multiple restraint mechanisms 2 can be provided, stacked, or arranged in a matrix. For example... Figure 2 As shown, multiple restraint mechanisms 2 are arranged to form two matrices. The temperature control module is connected to multiple restraint mechanisms 2 through multiple pipes 20, respectively, to complete the circulation of liquid in multiple restraint mechanisms 2.

[0095] like Figure 2As shown, the feeding mechanism 9 is located between the two matrices and is used to feed or unload materials to the restraint mechanisms 2 in the two matrices. Two conveying mechanisms 7 are also provided, each equipped with a drying mechanism 8. The feeding station 6 is a dual feeding station, thereby improving feeding efficiency.

[0096] In one example, such as Figure 2 As shown, the power module 5 performs charging and discharging operations on the battery 4. After the charging and discharging operations of the battery 4 are completed, the vacuum bag 13 is taken out and dried.

[0097] In this example, the battery charging and discharging system includes a conveying mechanism 9 and a drying mechanism 8. After the battery 4 has been charged and discharged, the vacuum bag 13 in the tank 21 can be removed through the conveying mechanism 9 and then transferred to the drying mechanism 8 to dry the liquid on the surface of the vacuum bag 13. The vacuum bag 13 is opened and the battery 4 is removed after the liquid on the surface of the vacuum bag 13 has been dried, thereby preventing liquid from splashing onto the battery 4 and damaging it.

[0098] It should be noted that the material conveying mechanism 9 can be a stacker crane or other similar mechanism. Those skilled in the art can determine the specific mechanism based on the actual situation, and no specific limitation is made here.

[0099] It should also be noted that the battery charging and discharging system also includes a conveying mechanism 7. The stacker can place the vacuum bag 13 onto the conveying mechanism 7, which then transports the vacuum bag 13 to the drying mechanism 8. The conveying mechanism 7 may include a conveyor belt or conveyor chain, etc., which can be determined by those skilled in the art according to the actual situation, and is not specifically limited here.

[0100] It should also be noted that after the liquid on the surface of the vacuum bag 13 dries, the vacuum bag 13 is opened and the battery 4 is taken out. The battery 4 is then picked up by a robotic arm or other material handling mechanism. Then, the conveying mechanism 7 can transport the empty vacuum bag 13 to the loading position 6 for the next round of battery 4 loading.

[0101] In this example, after the vacuum bag 13 is dried, the plug of the vacuum mechanism 3 is inserted into the vacuum bag 13, and gas is supplied into the vacuum bag 13.

[0102] In this example, after the vacuum bag 13 is dried, the plug of the vacuum mechanism 3 is inserted into the vacuum bag 13 and gas is supplied into the vacuum bag 13 to break the vacuum, thereby making it easier to open the first opening end 131 of the vacuum bag 13.

[0103] The above embodiments mainly describe the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. For the sake of brevity, they will not be elaborated here.

[0104] While specific embodiments of the invention have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A battery restraint method, characterized in that, include: Place the battery into a vacuum bag; Vacuum the vacuum bag; The vacuum bag is then sealed after vacuuming. Place the sealed vacuum bag into the canister; The container is sealed, and then liquid is injected into the container, which applies pressure to the surface of the vacuum bag.

2. The battery restraint method according to claim 1, characterized in that, The process of sealing the vacuum bag after vacuuming includes: The vacuum bag is sealed by the seals on the two mounting pieces fitting together.

3. The battery restraint method according to claim 1, characterized in that, The battery is subjected to a capacity test using a power module. After the capacity test is completed, some of the liquid in the tank is drained, the vacuum bag is removed, and the vacuum bag is dried.

4. The battery restraint method according to claim 1, characterized in that, After the sealed vacuum bag is placed into the canister, the vacuum bag is positioned.

5. The battery restraint method according to claim 4, characterized in that, Injecting liquid into the tank includes: First, fill the tank with atmospheric pressure liquid, then close the atmospheric pressure pipeline and open and switch to the high pressure pipeline to pressurize the liquid in the tank.

6. The battery restraint method according to claim 1, characterized in that, The battery is subjected to a capacity test via a power module, and the temperature inside the tank is monitored in real time during the capacity test. The liquid inside the tank flows into the temperature control system, is processed by the temperature control system, and then flows back into the tank from the temperature control system.

7. The battery restraint method according to claim 1, characterized in that, The hydraulic pressure of the liquid inside the tank is greater than or equal to 30 MPa.

8. A battery charge / discharge test method, characterized in that, include: The battery is restrained using any one of the battery restraint methods described in 1-7 above; The battery is electrically connected to the power module.

9. The battery charge / discharge test method according to claim 8, characterized in that, After the vacuum bag is vacuumed, it is placed tightly against the surface of the battery, and the conductive parts inside the vacuum bag are electrically connected to the battery's tabs. The sealed vacuum bag is placed inside the container, and the battery is electrically connected to the power module via a conductive component.

10. A battery charging and discharging system that applies the battery charging and discharging test method as described in claim 8 or 9.

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