A cell formation negative voltage regulation system

Abstract

The utility model discloses a negative pressure regulating system for battery cell formation, including a pressure regulating mechanism and an air suction mechanism; the pressure regulating mechanism includes a pressure regulating valve, an electric proportional valve and a vacuum pressure regulating valve connected in sequence, the pressure regulating valve is connected to a first positive pressure pipeline, and the vacuum pressure regulating valve is connected to a negative pressure pipeline; the air suction mechanism includes a bus and a suction nozzle assembly, the bus is connected to the vacuum pressure regulating valve, a pressure detection device is provided between the vacuum pressure regulating valve and the bus, and each interface of the bus is connected to a suction nozzle assembly. The utility model can change the negative pressure value of the system in real time, has good flexibility, can reduce the loss of electrolyte, and has a simple structure and convenient maintenance.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery production, and in particular relates to a negative pressure regulating system for battery cell formation. Background Art

[0002] In the production process of existing power battery formation equipment, it is necessary to ensure that the battery cell can achieve negative pressure control during the production process to ensure the discharge of gas inside the battery cell. However, the existing equipment can only achieve a fixed negative pressure value, the negative pressure mode is relatively single, lacks flexibility, and cannot flexibly adjust the negative pressure value in real time according to actual needs. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a battery cell formation negative pressure regulation system that can change the negative pressure value of the system in real time, has good flexibility, can reduce the loss of electrolyte, and has a simple structure and is easy to maintain.

[0004] The utility model provides the following technical solutions:

[0005] A negative pressure regulating system for forming a battery cell, comprising a pressure regulating mechanism and an air suction mechanism;

[0006] The pressure regulating mechanism comprises a pressure regulating valve, an electric proportional valve and a vacuum pressure regulating valve connected in sequence, the pressure regulating valve is connected to a first positive pressure pipeline, and the vacuum pressure regulating valve is connected to a negative pressure pipeline;

[0007] The air suction mechanism comprises a bus and a suction nozzle assembly, the bus is connected to the vacuum air pressure reducing valve, a pressure detection device is arranged between the vacuum air pressure reducing valve and the bus, and the bus is connected to a plurality of suction nozzle assemblies.

[0008] Furthermore, one end of the pressure regulating valve is connected to the first positive pressure pipeline, and the other end is connected to one end of the electric proportional valve through the first pipeline, and the other end of the electric proportional valve is connected to the vacuum pressure regulating valve through the second pipeline.

[0009] Furthermore, a first filter is provided between the vacuum air pressure relief valve and the negative pressure pipeline, one end of the first filter is connected to the negative pressure pipeline, and the other end is connected to the vacuum air pressure relief valve through a third pipeline.

[0010] Furthermore, it also includes a normally closed two-way valve, which is connected to the vacuum pressure regulating valve through a fourth pipeline.

[0011] Furthermore, it also includes a first manifold, the first manifold is connected to the normally closed two-way valve through a fifth pipeline, and the first manifold is connected to the pressure detection device through a sixth pipeline.

[0012] Furthermore, the pressure detection device is a vacuum pressure gauge.

[0013] Furthermore, it also includes a gas-liquid separator, which is connected to the first manifold through a seventh pipeline, and is connected to the drainage collection device through an eighth pipeline.

[0014] Furthermore, it also includes a second manifold and a vacuum breaker valve, the second manifold is connected to the gas-liquid separator through a ninth pipeline, the second manifold is connected to the vacuum breaker valve through a tenth pipeline, and the second manifold is connected to the bus through an eleventh pipeline.

[0015] Furthermore, the vacuum breaker valve is connected to a second filter via a twelfth pipeline, and the second filter is connected to a second positive pressure pipeline.

[0016] Furthermore, the suction nozzle assembly includes a liquid storage cup and a suction nozzle, one end of the liquid storage cup is connected to the bus, and the other end is connected to the suction nozzle.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] (1) The pressure regulating mechanism in the utility model includes a pressure regulating valve, an electric proportional valve and a vacuum pressure regulating valve, and the air suction mechanism includes a bus and a suction nozzle assembly. A pressure detection device is provided between the vacuum pressure regulating valve and the bus. The negative pressure in the system can be detected in real time by the pressure detection device, and the negative pressure setting value of the system can be changed in real time according to actual needs through the pressure regulating valve, the electric proportional valve and the vacuum pressure regulating valve connected in sequence, so as to realize stepless adjustment of the negative pressure value from -100kpa to 0kpa, which has good flexibility and can reduce the loss of electrolyte;

[0019] (2) The battery cell formation negative pressure regulation system provided by the utility model has a simple structure, is easy to install, operates reliably, and is convenient to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the negative pressure regulating system for battery cells in the utility model;

[0021] The markings in the figure are: 1. pressure regulating valve; 2. first positive pressure pipeline; 3. first pipeline; 4. electric proportional valve; 5. second pipeline; 6. vacuum pressure regulating valve; 7. third pipeline; 8. negative pressure pipeline; 9. normally closed two-way valve; 10. fourth pipeline; 11. fifth pipeline; 12. first manifold; 13. vacuum pressure gauge; 14. sixth pipeline; 15. gas-liquid separator; 16. seventh pipeline; 17. ninth pipeline; 18. second manifold; 19. tenth pipeline; 20. vacuum breaker; 21. twelfth pipeline; 22. second filter; 23. bus; 24. nozzle assembly; 25. eleventh pipeline; 26. first filter; 27. drainage collection device; 28. eighth pipeline; 29. ​​second positive pressure pipeline. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0023] like Figure 1 As shown, this embodiment provides a battery cell formation negative pressure regulating system, including a pressure regulating mechanism and an air suction mechanism; the pressure regulating mechanism includes a pressure regulating valve 1, an electric proportional valve 4 and a vacuum pressure regulating valve 6 connected in sequence, the pressure regulating valve 1 is connected to a first positive pressure pipeline 2, and the vacuum pressure regulating valve 6 is connected to a negative pressure pipeline 8; the air suction mechanism includes a bus 23 and a suction nozzle assembly 24, the bus 23 is connected to the vacuum pressure regulating valve 6, a pressure detection device is provided between the vacuum pressure regulating valve 6 and the bus 23, and the bus 23 is connected to multiple suction nozzle assemblies 24.

[0024] The pressure regulating valve 1 is used to control and adjust the pressure of the air pressure system. One end of the pressure regulating valve 1 is connected to the first positive pressure pipeline 2, and the other end is connected to one end of the electric proportional valve 4 through the first pipeline 3. The other end of the electric proportional valve 4 is connected to the connector of the vacuum pressure regulating valve 6 through the second pipeline 5. The electric proportional valve 4 is a pneumatic pressure regulator controlled by a digital signal.

[0025] A first filter 26 is provided between the vacuum pressure reducing valve 6 and the negative pressure pipeline 8. One end interface of the first filter 26 is connected to the negative pressure pipeline 8, and the negative pressure pipeline 8 is connected to a negative pressure source for providing negative pressure to the system; the other end interface of the first filter 26 is connected to the connector of the vacuum pressure reducing valve 6 through the third pipeline 7. The first filter 26 can prevent other impurities from entering the battery.

[0026] The battery cell formation negative pressure regulation system provided in this embodiment also includes a normally closed two-way valve 9 and a first manifold 12. The normally closed two-way valve 9 is an intermediate connecting valve, one end of which is connected to the joint of the vacuum pressure valve 6 through the fourth pipeline 10, and the other end of which is connected to the first manifold 12 through the fifth pipeline 11. The first manifold 12 is connected to the pressure detection device through the sixth pipeline 14. In this embodiment, the pressure detection device is a vacuum pressure gauge 13, and a vacuum digital pressure gauge can be selected.

[0027] The battery cell formation negative pressure regulation system provided in this embodiment further includes a gas-liquid separator 15 , a second manifold 18 and a vacuum breaker valve 20 .

[0028] The gas-liquid separator 15 is connected to the first manifold 12 through the seventh pipeline 16, connected to the second manifold 18 through the ninth pipeline 17, and connected to the drainage collection device 27 through the eighth pipeline 28. The second manifold 18 is connected to the vacuum breaker 20 through the tenth pipeline 19, and connected to the bus 23 through the eleventh pipeline 25. The gas-liquid separator 15 is a gas-liquid separation device that separates corrosive liquid and gas. The gas-liquid separator 15 includes a condenser liquid separation device, a transparent visual liquid level detection device, and a manual / automatic drainage device. In this system, the gas-liquid separator 15 can separate the electrolyte leaked from the bus 23 to prevent the electrolyte from being sucked into other components, and at the same time helps to recover the electrolyte.

[0029] The vacuum breaker valve 20 is used to stop the vacuum effect and protect the pipes and components in the system. The vacuum breaker valve 20 is connected to the second filter 22 through the twelfth pipe 21. The second filter 22 is connected to the second positive pressure pipe 29. The second filter 22 can prevent other impurities from entering the battery.

[0030] The nozzle assembly 24 includes a liquid storage cup and a nozzle. The liquid storage cup is a temporary liquid storage device, one end of which is connected to the bus 23, and the other end is connected to the nozzle. The nozzle can be connected to the battery to extract the gas and electrolyte in the battery and store the electrolyte in the liquid storage cup. The bus 23 can fix multiple nozzle assemblies 24 to achieve simultaneous negative pressure operation of multiple batteries.

[0031] The battery cell formation negative pressure regulation system provided in this embodiment also includes a PLC controller, which is electrically connected to the pressure regulating valve 1, the electrical proportional valve 4, the vacuum pressure regulating valve 6, the vacuum breaking valve 20, the gas-liquid separator 15 and other devices to facilitate automatic control.

[0032] The working principle of the battery cell formation negative pressure regulation system provided in this embodiment is:

[0033] The negative pressure pipeline 8 is connected to the negative pressure source, the first positive pressure pipeline 2 and the second positive pressure pipeline 29 are connected to the positive pressure source, and each suction nozzle is connected to the battery; the negative pressure source provides negative pressure for the system, and the vacuum pressure gauge 13 detects the negative pressure in the system in real time and feeds back to the PLC controller. The PLC controller controls the pressure regulating valve 1 and the vacuum pressure regulating valve 6 to adjust and control the pressure of the system through the electrical proportional valve 4 according to the actual set needs and the pressure conditions in the received system, so as to achieve negative pressure regulation of the battery cell formation; when the system is under negative pressure, the air and electrolyte in the battery are sucked out by the suction nozzle, and the electrolyte is temporarily stored in the liquid storage cup.

[0034] It should be noted that, in the description of the present invention, the directions or positional relationships indicated by terms such as "front", "rear", "left", "right", "up", "down", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0035] In the description of the present invention, it is to be understood that the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0036] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A battery cell formation negative pressure regulation system, characterized in that: It includes a pressure regulating mechanism and an air suction mechanism; The pressure regulating mechanism comprises a pressure regulating valve, an electric proportional valve and a vacuum pressure regulating valve connected in sequence, the pressure regulating valve is connected to a first positive pressure pipeline, and the vacuum pressure regulating valve is connected to a negative pressure pipeline; The air suction mechanism comprises a bus and a suction nozzle assembly, the bus is connected to the vacuum air pressure reducing valve, a pressure detection device is arranged between the vacuum air pressure reducing valve and the bus, and the bus is connected to a plurality of suction nozzle assemblies.

2. The battery cell formation negative pressure regulation system according to claim 1, characterized in that: One end of the pressure regulating valve is connected to the first positive pressure pipeline, and the other end is connected to one end of the electric proportional valve through the first pipeline, and the other end of the electric proportional valve is connected to the vacuum pressure regulating valve through the second pipeline.

3. The battery cell formation negative pressure regulation system according to claim 1, characterized in that: A first filter is provided between the vacuum air pressure relief valve and the negative pressure pipeline, one end of the first filter is connected to the negative pressure pipeline, and the other end is connected to the vacuum air pressure relief valve through a third pipeline.

4. The battery cell formation negative pressure regulation system according to claim 1, characterized in that: It also includes a normally closed two-way valve, which is connected to the vacuum pressure regulating valve through a fourth pipeline.

5. The battery cell formation negative pressure regulation system according to claim 4, characterized in that: It also includes a first manifold, which is connected to the normally closed two-way valve through a fifth pipeline, and is connected to the pressure detection device through a sixth pipeline.

6. The battery cell formation negative pressure regulation system according to claim 1, characterized in that: The pressure detection device is a vacuum pressure gauge.

7. The battery cell formation negative pressure regulation system according to claim 5, characterized in that: It also includes a gas-liquid separator, which is connected to the first manifold through a seventh pipeline, and is connected to the drainage collection device through an eighth pipeline.

8. The battery cell formation negative pressure regulation system according to claim 7, characterized in that: It also includes a second manifold and a vacuum breaker valve, wherein the second manifold is connected to the gas-liquid separator via a ninth pipeline, the second manifold is connected to the vacuum breaker valve via a tenth pipeline, and the second manifold is connected to the busbar via an eleventh pipeline.

9. The battery cell formation negative pressure regulation system according to claim 8, characterized in that: The vacuum breaker valve is connected to a second filter via a twelfth pipeline, and the second filter is connected to a second positive pressure pipeline.

10. The battery cell formation negative pressure regulation system according to claim 1, characterized in that: The suction nozzle assembly comprises a liquid storage cup and a suction nozzle, one end of the liquid storage cup is connected to the bus bar, and the other end is connected to the suction nozzle.

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