Battery formation negative pressure system

Abstract

The utility model relates to the technical field of battery production, and more specifically relates to a battery formation negative pressure system, which comprises: a support; a plurality of negative pressure cups are arranged, and the inlet end of each negative pressure cup is provided with a negative pressure suction nozzle; the busbar is internally provided with a confluence cavity, an outlet end and a plurality of inlet ends, the outlet end and the inlet ends are communicated with the confluence cavity, and the inlet ends of the busbar are in one-to-one correspondence with the outlet ends of the negative pressure cups and are communicated with the outlet ends of the negative pressure cups; the negative pressure generating device is connected with the outlet end of the busbar; solenoid valves are further arranged between the inlet ends of the busbar and the outlet ends of the negative pressure cups. Due to the introduction of the electromagnetic valves, the negative pressure state of each negative pressure cup can be independently controlled, namely each negative pressure channel is independently controlled, so that the on-off time of negative pressure can be accurately adjusted according to the requirements of different batteries or different formation stages, the precision and controllability of the formation process are improved, and the production efficiency is improved. And the formation quality of all batteries can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, and more specifically, to a battery formation negative pressure system. Background Art

[0002] Secondary batteries are high-performance, environmentally friendly, energy storage batteries. In recent years, they have rapidly developed into commercial batteries with high voltage, high energy density, and good cycle life, and are widely used in the fields of vehicles, medical treatment, and military. In order to meet market demand and improve the safety performance and service life of secondary batteries, secondary batteries have strict control over the production process of the early plate production process, assembly, and formation.

[0003] Among them, the secondary battery has a very important influence on the battery performance during the formation stage. In order to form a good SEI film on the negative electrode surface, negative pressure formation is adopted in the formation stage to timely discharge the gas generated during the battery formation, so that the SEI film is formed uniformly and stably, thereby improving the battery performance.

[0004] The Chinese utility model patent with announcement number CN 220324519 U discloses a negative pressure device for battery cell formation. By setting a dual-channel negative pressure bus, the vacuum flow of each negative pressure nozzle can be balanced. However, there are still some other areas for improvement in the negative pressure device. For example, the bus is directly connected to the negative pressure nozzle, and single-channel negative pressure extraction cannot be achieved. Therefore, when the battery is subjected to negative pressure extraction, multiple batteries must be simultaneously subjected to negative pressure extraction, which makes it difficult to control the control accuracy. Utility Model Content

[0005] The main purpose of the utility model is to provide a battery formation negative pressure system, which can realize single-channel negative pressure extraction work, making the control more precise, thereby improving the quality of battery formation.

[0006] In order to solve the above technical problems, the utility model proposes a battery formation negative pressure system, comprising:

[0007] Bracket;

[0008] There are several negative pressure cups, which are arranged side by side on the bracket, and a negative pressure nozzle is arranged on the inlet end of each negative pressure cup;

[0009] A busbar is arranged on the bracket, wherein a busbar has a busbar chamber, wherein an outlet end connected to the busbar chamber and a plurality of inlet ends connected to the busbar chamber are arranged on the busbar, wherein each inlet end of the busbar corresponds to and is connected to each outlet end of the negative pressure cup;

[0010] and a negative pressure generating device, connected to the outlet end of the bus bar, for generating negative pressure;

[0011] Wherein, a solenoid valve is further arranged between each inlet end of the bus bar and each outlet end of the negative pressure cup.

[0012] In the above technical solution, further, it also includes:

[0013] The flow meter is arranged on the outlet end of the bus bar.

[0014] In any of the above technical solutions, further, it also includes:

[0015] A gas-liquid separator, the gas-liquid separator having a first port, a second port and a third port;

[0016] Wherein, the outlet end of the bus is connected to the first port through a second connecting pipe; and the negative pressure generating device is connected to the second port through a third connecting pipe.

[0017] In any of the above technical solutions, further, it also includes: a residual liquid cup connected to the third port.

[0018] In any of the above technical solutions, further, it also includes:

[0019] A negative pressure gauge is provided on the third connecting pipe and is used to detect the pressure value in the third connecting pipe.

[0020] In any of the above technical solutions, further, it also includes:

[0021] A pressure regulating valve is arranged on the third connecting pipe and is used for regulating the pressure in the third connecting pipe.

[0022] In any of the above technical solutions, further, the pressure regulating valve includes:

[0023] a pressure reducing valve, arranged on the third connecting pipe;

[0024] and a proportional valve, disposed on the third connecting pipe;

[0025] Wherein, the pressure reducing valve controls the pressure value in the third connecting pipe through the output signal of the proportional valve.

[0026] In any of the above technical solutions, further, it also includes:

[0027] The air control valve is arranged on the third connecting pipe and is used for controlling the on-off of the third connecting pipe.

[0028] In any of the above technical solutions, further, the outlet end of the negative pressure cup is connected to the inlet end of the bus through a first connecting pipe, and the solenoid valve is arranged on the first connecting pipe.

[0029] In any of the above technical solutions, further, it also includes:

[0030] The filter is connected to the negative pressure generating device and is used for drying and filtering the gas to be discharged by the negative pressure generating device.

[0031] Beneficial effect: Compared with the prior art, the negative pressure generated by multiple negative pressure cups can be gathered to one outlet through the design of the busbar, that is, multiple negative pressure channels are designed, which reduces the number of connections with the negative pressure generating device and improves the operating efficiency of the entire system. On the other hand, the introduction of the solenoid valve allows the negative pressure state of each negative pressure cup to be controlled individually, that is, each negative pressure channel is controlled individually, so that the on-off time of the negative pressure can be accurately adjusted according to the needs of different batteries or different formation stages, thereby improving the accuracy and controllability of the formation process, and thus ensuring the formation quality of all batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] 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 these drawings without paying creative work.

[0033] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0034] Figure 2 It is a structural schematic diagram of the main view of the utility model.

[0035] The following are the descriptions of the reference numerals:

[0036] 10. First connecting pipe; 20. Second connecting pipe; 30. Third connecting pipe; 100. Negative pressure cup; 110. Negative pressure nozzle; 120. Solenoid valve; 200. Bus; 300. Negative pressure generating device; 400. Flow meter; 500. Gas-liquid separator; 600. Residual liquid cup; 700. Negative pressure gauge; 810. Pressure reducing valve; 820. Proportional valve; 900. Air control valve; 1000. Filter. DETAILED DESCRIPTION

[0037] Below, the example embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the example embodiments described herein. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0038] It should be noted that, as shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not specifically refer to the singular, but may also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list, and the method or device may also include other steps or elements.

[0039] If the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications 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 indications will also change accordingly.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. 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 utility model.

[0042] The utility model proposes a battery formation negative pressure system, which can pump negative pressure on a plurality of batteries at a time by adopting a multi-channel method, and can also control each negative pressure pumping channel at the same time, thereby effectively ensuring the control accuracy and improving the quality of battery formation.

[0043] The battery formation negative pressure system of the present application is described in detail through the following embodiments.

[0044] Embodiment 1:

[0045] like Figure 1-Figure 2 As shown, in this embodiment, the battery formation negative pressure system includes: a bracket (not shown in the figure), which is the basis of the entire system and is used to support and fix other components;

[0046] There are several negative pressure cups 100, which are arranged side by side on the bracket. A negative pressure nozzle 110 is provided on the inlet end of each negative pressure cup 100, which is connected to the injection hole on the battery through the negative pressure nozzle 110 to form a negative pressure environment, and can pump negative pressure to the battery;

[0047] The bus bar 200 is arranged on the bracket, and has a bus bar chamber inside. The bus bar 200 is provided with an outlet end connected to the bus bar chamber, and a plurality of inlet ends connected to the bus bar chamber. The inlet ends of the bus bar 200 correspond to and are connected to the outlet ends of the negative pressure cups 100 one by one. Through the bus bar 200, the negative pressure generated by the plurality of negative pressure cups 100 can be gathered to one outlet end.

[0048] and a negative pressure generating device 300 connected to the outlet end of the bus bar 200 for generating negative pressure;

[0049] Among them, solenoid valves 120 are also arranged between each inlet end of the bus 200 and the outlet end of each negative pressure cup 100. These solenoid valves 120 are used to control the on and off of the negative pressure. The negative pressure state of each negative pressure cup 100 can be individually controlled as needed to achieve more refined operation.

[0050] Through the design of the bus 200, the negative pressure generated by multiple negative pressure cups 100 can be gathered to one outlet end. In other words, by designing multiple negative pressure channels, the number of connections with the negative pressure generating device 300 is reduced, thereby improving the operating efficiency of the entire system.

[0051] On the other hand, the introduction of the solenoid valve 120 enables the negative pressure state of each negative pressure cup 100 to be individually controlled, that is, each negative pressure channel can be individually controlled. In this way, the negative pressure on-off time of each negative pressure cup 100 can be accurately adjusted according to the needs of different batteries or different formation stages, thereby improving the accuracy and controllability of the formation process, thereby ensuring the formation quality of all batteries.

[0052] Specifically, the solenoid valve 120 is an electrical proportional valve, which can also realize the individual control of the negative pressure of each negative pressure cup 100 .

[0053] It should be noted that the outlet end of the negative pressure cup 100 is connected to the inlet end of the bus 200 through the first connecting pipe 10, and the solenoid valve 120 is arranged on the first connecting pipe 10. This arrangement ensures that the liquid and gas adsorbed by the negative pressure cup 100 can be smoothly transferred to the bus 200, and then centrally processed by the bus 200.

[0054] Specifically, the outlet end of each negative pressure cup 100 is equipped with a corresponding first connecting pipe 10, one end of which is tightly connected to the outlet end of the negative pressure cup 100, and the other end is connected to the corresponding inlet end on the bus 200. Such a design ensures the continuity and stability of the negative pressure during the transmission process and reduces the negative pressure loss.

[0055] It should be noted that the present embodiment further includes: a gas-liquid separator 500 having a first port, a second port and a third port; and a residual liquid cup 600, a container for carrying liquid;

[0056] The outlet end of the bus 200 is connected to the first port through the second connecting pipe 20 ; the negative pressure generating device 300 is connected to the second port through the third connecting pipe 30 , and the residual liquid cup 600 is connected to the third port.

[0057] The negative pressure generated by the negative pressure generating device 300 can effectively introduce negative pressure into the system, so that the negative pressure cup 100 can draw negative pressure to the battery, and then the extracted gas-liquid mixture first flows to the bus 200 through the first connecting pipe 10, and then enters the gas-liquid separator 500 through the second connecting pipe 20. The gas and liquid mixture will pass through the separation mechanism during the flow process, so that the gas and liquid are discharged from different ports respectively. Specifically, the gas component will be discharged from the second port and finally discharged from the exhaust end of the negative pressure generating device 300, while the liquid component will be discharged from the third port to the residual liquid cup 600.

[0058] Embodiment 2:

[0059] This embodiment is a further improvement made on the basis of the first embodiment.

[0060] like Figure 1-Figure 2 As shown, in this embodiment, it also includes: a flow meter 400, which is arranged on the outlet end of the bus 200.

[0061] By setting up the flow meter 400, the staff can know in real time the flow of negative pressure gas passing through the outlet end of the bus 200. This helps to timely discover abnormal or fluctuating flow, so as to take corresponding measures to adjust and optimize, and ensure the stable operation of the system.

[0062] Embodiment three:

[0063] This embodiment is a further improvement made on the basis of the first or second embodiment.

[0064] like Figure 1-Figure 2 As shown, in this embodiment, it also includes: a negative pressure gauge 700, which is arranged on the third connecting pipe 30 and is used to detect the pressure value in the third connecting pipe 30.

[0065] In the battery formation negative pressure system, in order to more accurately monitor and control the negative pressure environment, this embodiment adds a negative pressure gauge 700 on the third connecting pipe 30. The negative pressure gauge 700 is an instrument for measuring the negative pressure value in the pipeline, which can display the pressure value in the third connecting pipe 30 in real time and provide intuitive pressure data for the operator.

[0066] Specifically, the negative pressure gauge 700 is installed on the third connecting pipe 30, and is located between the second port of the gas-liquid separator 500 and the negative pressure generating device 300. When the negative pressure generating device 300 generates negative pressure and transmits it to the gas-liquid separator 500 through the third connecting pipe 30, the negative pressure gauge 700 starts to work, and measures and records the pressure value in the third connecting pipe 30 in real time. The operator can understand the pressure state of the current negative pressure environment by observing the reading of the negative pressure gauge 700, and thus make corresponding adjustments and controls.

[0067] Embodiment 4:

[0068] This embodiment is a further improvement made on the basis of any of the above embodiments.

[0069] like Figure 1-Figure 2 As shown, in this embodiment, it also includes: a pressure regulating valve, which is arranged on the third connecting pipe 30, for adjusting the pressure in the third connecting pipe 30. The pressure regulating valve includes: a pressure reducing valve 810, which is arranged on the third connecting pipe 30; and a proportional valve 820, which is arranged on the third connecting pipe 30;

[0070] The pressure reducing valve 810 controls the pressure value in the third connecting pipe 30 through the output signal of the proportional valve 820 .

[0071] In order to achieve precise control of the negative pressure environment, this embodiment further provides a pressure regulating valve on the third connecting pipe 30. The pressure regulating valve includes a pressure reducing valve 810 and a proportional valve 820, which work together to achieve precise regulation of the pressure value in the third connecting pipe 30.

[0072] The proportional valve 820 is a valve that can proportionally adjust the flow rate or pressure of a fluid (gas or liquid) according to an input signal (such as an electrical signal). In this system, the proportional valve 820 is also arranged on the third connecting pipe 30, which receives a command signal from the control system or an operator, and outputs a corresponding control signal to the pressure reducing valve 810.

[0073] The pressure reducing valve 810 is a valve that automatically adjusts pressure, and is generally used to reduce high pressure gas or liquid to a desired lower pressure. In the present system, the pressure reducing valve 810 is disposed on the third connecting pipe 30, and its main function is to reduce the pressure output from the negative pressure generating device 300 to meet the specific requirements of the system for negative pressure.

[0074] Specifically, when the pressure in the third connecting pipe 30 needs to be adjusted, the control system or the operator sends a command signal to the proportional valve 820. The proportional valve 820 outputs a corresponding control signal to the pressure reducing valve 810 according to the received command signal. The pressure reducing valve 810 adjusts the opening of its internal valve according to the control signal, thereby controlling the pressure value in the third connecting pipe 30. In this way, the system can achieve precise control of the negative pressure environment.

[0075] Embodiment five:

[0076] This embodiment is a further improvement made on the basis of any of the above embodiments.

[0077] like Figure 1-Figure 2 As shown, in this embodiment, it also includes: an air control valve 900, which is arranged on the third connecting pipe 30 and is used to control the opening and closing of the third connecting pipe 30.

[0078] An air control valve 900 is added to the third connecting pipe 30. The air control valve 900 is a valve that uses gas pressure or signals to control the on and off of a fluid (gas or liquid). In this system, the main function of the air control valve 900 is to control the on and off of the third connecting pipe 30 as needed, thereby achieving accurate management and control of the negative pressure environment.

[0079] Embodiment six:

[0080] This embodiment is a further improvement made on the basis of any of the above embodiments.

[0081] like Figure 1-Figure 2 As shown, in this embodiment, it also includes: a filter 1000, which is connected to the negative pressure generating device 300 and is used to dry and filter the gas to be discharged by the negative pressure generating device 300. Specifically, the filter 1000 is installed at the outlet end of the third connecting pipe 30.

[0082] The filter 1000 is usually composed of a filter element, a housing, and a connecting pipe. The filter element is the core component of the filter 1000. It is made of special filter materials and can effectively remove moisture, dust and other impurities in the gas. The housing is used to protect the filter element and connect the connecting pipe. The connecting pipe connects the negative pressure generating device 300 to the filter 1000, so that the gas generated by the negative pressure generating device 300 can pass through the filter 1000 and then be discharged.

[0083] When the negative pressure generating device 300 starts working, it generates negative pressure and sucks in gas. Before the gas enters the filter 1000 through the connecting pipe, it is filtered and dried by the filter element. The filter element can effectively remove moisture, dust and other impurities in the gas, making the filtered gas purer and drier to avoid polluting the environment.

[0084] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. Battery formation negative pressure system, characterized in that: include: Bracket; A plurality of negative pressure cups (100) are arranged side by side on the bracket, and a negative pressure suction nozzle (110) is arranged on the inlet end of each negative pressure cup (100); A busbar (200) is arranged on the bracket, the busbar (200) has a busbar chamber inside, the busbar (200) is provided with an outlet end connected to the busbar chamber, and a plurality of inlet ends connected to the busbar chamber, each inlet end of the busbar (200) corresponds to and is connected to an outlet end of each negative pressure cup (100) respectively; and a negative pressure generating device (300), connected to the outlet end of the bus bar (200) and used for generating negative pressure; Wherein, a solenoid valve (120) is further provided between each inlet end of the busbar (200) and each outlet end of the negative pressure cup (100).

2. The battery formation negative pressure system according to claim 1, characterized in that: Also includes: A flow meter (400) is arranged on the outlet end of the bus (200).

3. The battery formation negative pressure system according to claim 1, characterized in that: Also includes: A gas-liquid separator (500), wherein the gas-liquid separator (500) has a first port, a second port, and a third port; The outlet end of the bus bar (200) is connected to the first port via a second connecting pipe (20); and the negative pressure generating device (300) is connected to the second port via a third connecting pipe (30).

4. The battery formation negative pressure system according to claim 3, characterized in that: Also includes: The residual liquid cup (600) is connected to the third port.

5. The battery formation negative pressure system according to claim 3, characterized in that: Also includes: A negative pressure gauge (700) is arranged on the third connecting pipe (30) and is used to detect the pressure value in the third connecting pipe (30).

6. The battery formation negative pressure system according to claim 5, characterized in that: Also includes: A pressure regulating valve is arranged on the third connecting pipe (30) and is used to regulate the pressure in the third connecting pipe (30).

7. The battery formation negative pressure system according to claim 6, characterized in that: The pressure regulating valve comprises: a pressure reducing valve (810), arranged on the third connecting pipe (30); and a proportional valve (820) disposed on the third connecting pipe (30); The pressure reducing valve (810) controls the pressure value in the third connecting pipe (30) through the output signal of the proportional valve (820).

8. The battery formation negative pressure system according to claim 3, characterized in that: Also includes: The air control valve (900) is arranged on the third connecting pipe (30) and is used to control the opening and closing of the third connecting pipe (30).

9. The battery formation negative pressure system according to claim 1, characterized in that: The outlet end of the negative pressure cup (100) is connected to the inlet end of the busbar (200) via a first connecting pipe (10), and the solenoid valve (120) is arranged on the first connecting pipe (10).

10. The battery formation negative pressure system according to any one of claims 1 to 9, characterized in that: Also includes: The filter (1000) is connected to the negative pressure generating device (300) and is used to dry and filter the gas to be discharged from the negative pressure generating device (300).

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