A battery explosion-proof formation machine

Abstract

This utility model provides a lithium battery explosion-proof formation machine, comprising: a housing, within which an explosion-proof formation system is installed; the explosion-proof formation system includes a negative pressure extraction unit, a gas manifold unit, a vacuum control unit, a gas detection unit, and an inert gas replenishment unit; the negative pressure extraction unit is connected to the gas manifold unit, the gas manifold unit is connected to the vacuum control unit, and the inert gas replenishment unit is connected to the gas manifold unit; the gas detection unit is located in the gas flow path. By setting up the explosion-proof formation system, functional units such as negative pressure extraction, gas manifold, vacuum control, gas detection, and inert gas replenishment are integrated, forming a complete explosion-proof protection system that can effectively prevent the risk of combustion and explosion during the formation process.

Description

Technical Field

[0001] This utility model relates to the field of energy storage battery manufacturing technology, and in particular to a battery explosion-proof formation machine. Background Technology

[0002] With the development of the new energy vehicle industry and the gradual increase in market penetration exceeding 50%, as well as the growth of the energy storage market, the demand for lithium batteries is increasing daily. Lithium batteries are widely used in new energy vehicles and energy storage due to their advantages such as high energy density and long lifespan.

[0003] Currently, while maintaining the same battery size, improving the energy density and capacity retention of individual cells is a crucial way to enhance product competitiveness. One such technology is positive electrode lithium replenishment, which involves adding lithium replenishment materials (such as LFO and LNO) to the positive electrode of a lithium-ion battery. During charging, these materials decompose and release active lithium, thus compensating for the irreversible loss of active lithium caused by the growth of the SEI layer in the negative electrode, effectively improving the battery's capacity retention.

[0004] However, the lithium-added material system generates a large amount of oxygen and flammable gases during the formation process. These gases, when collected in the vacuum pipeline, pose a risk of combustion and explosion, presenting a severe challenge to the production of lithium iron phosphate batteries with cathode lithium supplementation. Currently available formation machines generally suffer from the following shortcomings:

[0005] 1. Simple explosion-proof measures. Existing chemical formation equipment only has an explosion-proof metal shell and explosion-proof glass installed inside the equipment, which is not a complete explosion-proof function;

[0006] 2. Lack of gas monitoring. There are no devices for detecting combustible gases and oxygen concentrations, making it impossible to monitor and assess the gas production status during the formation process in real time.

[0007] 3. Safety hazards exist. Flammable gases generated during the formation process can easily accumulate inside the equipment and in the vacuum pipelines, posing a risk of deflagration.

[0008] Therefore, there is an urgent need for a battery explosion-proof formation machine that can effectively prevent the risk of combustion and explosion during the formation process and ensure production safety. Utility Model Content

[0009] The purpose of this invention is to solve the problem in the prior art that the gas production status during the equipment formation process cannot be determined.

[0010] This utility model provides a battery explosion-proof formation machine, comprising:

[0011] The housing contains an explosion-proof chemical formation system;

[0012] The explosion-proof formation system includes a negative pressure extraction unit, a gas manifold unit, a vacuum control unit, a gas detection unit, and an inert gas replenishment unit;

[0013] The negative pressure pumping unit is connected to the gas manifold unit, the gas manifold unit is connected to the vacuum control unit, and the inert gas replenishment unit is connected to the gas manifold unit; the gas detection unit is located on the gas flow path.

[0014] Furthermore, the negative pressure suction unit includes a negative pressure cup and a negative pressure nozzle, the negative pressure nozzle being disposed on the negative pressure cup, and the negative pressure cup being connected to the gas manifold unit.

[0015] Furthermore, the gas manifold unit includes a first manifold, a second manifold, and a third manifold connected in sequence. The first manifold is connected to the negative pressure pumping unit, the second manifold is connected to the inert gas replenishment unit, and the third manifold is connected to the vacuum control unit.

[0016] Furthermore, the vacuum control unit includes a vacuum breaking valve, a filter, a two-way valve, a vacuum pressure regulating valve, an electro-proportional valve, and a positive pressure regulating valve connected in sequence. The vacuum pressure regulating valve is connected to an external vacuum source, and the positive pressure regulating valve is connected to an external positive pressure source.

[0017] Furthermore, the vacuum pressure regulating valve, the electro-proportional valve, and the positive pressure regulating valve are connected to the host computer for adjusting different vacuum levels.

[0018] Furthermore, the gas detection unit includes:

[0019] An oxygen concentration sensor is installed inside the housing;

[0020] The first combustible gas detection sensor is installed after the first busbar;

[0021] The second combustible gas detection sensor is installed after the two-way valve.

[0022] Furthermore, the detection alarm values ​​of the first combustible gas detection sensor and the second combustible gas detection sensor are less than 1%-3%.

[0023] Furthermore, it also includes an electromagnetic control valve, which is connected to a host computer and is used to automatically control the flow of inert gas based on the detection data from the combustible gas detection sensor.

[0024] Furthermore, the inert gas replenishment unit includes an electromagnetic control valve, which is connected to the second manifold.

[0025] Furthermore, it also includes a negative pressure gauge installed on the third manifold, a flow monitoring device installed between the second and third manifolds, and a gas-liquid separator installed before the filter.

[0026] Compared to existing technologies, this invention offers at least the following advantages: By incorporating an explosion-proof formation system, it integrates functional units such as negative pressure extraction, gas manifold, vacuum control, gas detection, and inert gas replenishment, forming a complete explosion-proof protection system that effectively prevents the risk of combustion and explosion during the formation process. A gas detection unit is installed along the gas flow path to monitor the gas state in real time during the formation process and promptly detect potential safety hazards. The series connection of the negative pressure extraction unit with the gas manifold unit and vacuum control unit, along with the placement of the inlet and outlet, forms a complete gas flow loop, preventing the accumulation of hazardous gases during the formation process. The connection between the inert gas replenishment unit and the gas manifold unit allows for timely replenishment of inert gas when needed, effectively diluting and replacing flammable gases, thus preventing explosion risks at the source. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained as provided without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of a lithium battery explosion-proof formation machine in one embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the explosion-proof formation system inside the lithium battery explosion-proof formation machine in one embodiment of the present invention;

[0030] The components are as follows: 1-Explosion-proof chemical formation machine housing; 2-Oxygen concentration sensor; 3-First manifold; 4-Negative pressure cup; 5-Negative pressure nozzle; 6-First combustible gas detection sensor; 7-Second manifold; 8-Vacuum breaking valve; 9-Filter; 10-Two-way valve; 11-Second combustible gas detection sensor; 12-Vacuum pressure regulating valve; 13-Electro-proportional valve; 14-Positive pressure regulating valve; 15-Negative pressure gauge; 16-Flow monitoring; 17-Third manifold; 18-Gas-liquid separator; 19-Solenoid control valve; 20-Inert gas replenishment unit. A-External vacuum source; B-External positive pressure source. Detailed Implementation

[0031] The following is a more detailed description of a battery explosion-proof formation machine according to the present invention, with reference to the accompanying drawings, which illustrate preferred embodiments of the present invention. It should be understood that those skilled in the art can modify the present invention described herein while still achieving its advantageous effects. Therefore, the following description should be understood as being broadly known to those skilled in the art and is not intended to limit the present invention.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] The present invention will be described in more detail below by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer as will be explained below. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0034] This embodiment provides a battery explosion-proof formation machine. Please refer to [reference needed]. Figure 1 ,include:

[0035] The housing contains an explosion-proof chemical formation system;

[0036] The explosion-proof formation system includes a negative pressure extraction unit, a gas manifold unit, a vacuum control unit, a gas detection unit, and an inert gas replenishment unit;

[0037] The negative pressure pumping unit is connected to the gas manifold unit, the gas manifold unit is connected to the vacuum control unit, and the inert gas replenishment unit is connected to the gas manifold unit; the gas detection unit is located on the gas flow path.

[0038] The types of batteries applicable to the explosion-proof formation machine in this embodiment include lithium-ion batteries, sodium-ion batteries, and other compatible batteries. It is understood that the aforementioned battery types are not limiting to this application. Specifically, the main body of the battery explosion-proof formation machine is a housing 1 structure, inside which an explosion-proof formation system is installed. The explosion-proof formation system includes five main functional units: a negative pressure extraction unit connected to a gas manifold unit, a gas manifold unit connected to a vacuum control unit, an inert gas replenishment unit 20 connected to the gas manifold unit, and a gas detection unit located on the gas flow path.

[0039] The gas generated during the formation process is absorbed by negative pressure. The gas manifold unit collects and guides the gas from various locations. The vacuum control unit controls the vacuum level of the system. The gas detection unit monitors the composition and concentration of the gas. At the same time, inert gas can be replenished in a timely manner through the inert gas replenishment unit 20. The gas state is monitored by the gas detection unit throughout the process.

[0040] For further details, please refer to... Figure 2 The negative pressure suction unit includes a negative pressure cup 4 and a negative pressure nozzle 5. The negative pressure nozzle 5 is disposed on the negative pressure cup 4, and the negative pressure cup 4 is connected to the gas manifold unit.

[0041] Specifically, the negative pressure nozzle 5 serves as the gas collection inlet, directly collecting the gas generated at the battery formation station. The negative pressure cup 4 acts as the gas collection chamber, providing initial collection and buffering. Through connection with the gas manifold unit, the collected gas is guided into the subsequent gas treatment system. The design of the negative pressure cup 4 prevents gas from directly entering the piping system, providing an initial buffer space and enabling directional collection of gases generated during the formation process. The negative pressure nozzle 5 makes gas collection more precise and efficient. The overall structure is simple, reliable, and easy to install and maintain.

[0042] Furthermore, the gas manifold unit includes a first manifold 3, a second manifold 7, and a third manifold 17 connected in sequence. The first manifold 3 is connected to the negative pressure pumping unit, the second manifold 7 is connected to the inert gas replenishment unit 20, and the third manifold 17 is connected to the vacuum control unit.

[0043] Specifically, the gas collected by the negative pressure pumping unit first enters the first manifold 3, then passes through the second manifold 7 and the third manifold 17 in sequence, finally entering the vacuum control unit through the third manifold 17. This three-stage manifold design achieves progressive gas collection and buffering. This staged manifold design avoids sudden gas accumulation, provides ample gas buffer space, facilitates uniform gas distribution and stable flow, and is beneficial for the stable operation of the subsequent vacuum control unit, reducing the risk of pressure fluctuations in the piping system.

[0044] Furthermore, the vacuum control unit includes a vacuum breaking valve 8, a filter 9, a two-way valve 10, a vacuum pressure regulating valve 12, an electro-proportional valve 13, and a positive pressure regulating valve 14 connected in sequence. The vacuum pressure regulating valve 12 is connected to an external vacuum source A, and the positive pressure regulating valve 14 is connected to an external positive pressure source B.

[0045] Specifically, the six components are connected sequentially as described above, with the final positive pressure regulating valve 14 connected to the exhaust port on the housing 1. The vacuum breaking valve 8 is used to quickly release the system vacuum when needed; the filter 9 filters impurities from the gas; the two-way valve 10 controls gas flow / cutoff; the vacuum regulating valve 12 adjusts the system vacuum level; the electro-proportional valve 13 precisely controls the gas flow rate; and the positive pressure regulating valve 14 controls the exhaust pressure. This configuration achieves precise control of the system vacuum level, provides multiple safety protection functions, allows for flexible adjustment of the gas flow rate as needed, and ensures the stability of the system exhaust pressure. The filter 9 protects the subsequent valve components, forming a complete vacuum control system.

[0046] Furthermore, the vacuum pressure regulating valve 12, the electro-proportional valve 13, and the positive pressure regulating valve 14 are connected to the host computer for adjusting different vacuum levels.

[0047] Specifically, centralized control and monitoring via a host computer enable automated adjustment and remote control, supporting parameter settings based on different operating conditions. The vacuum regulating valve 12 adjusts the overall system vacuum, the electro-proportional valve 13 precisely controls gas flow, and the positive pressure regulating valve 14 controls exhaust pressure. These three components work together to achieve precise adjustment of different vacuum levels. This design enables intelligent control of the system vacuum, improving the automation level of system operation. Parameters can be flexibly adjusted according to different process requirements, ensuring stable system operation under various conditions. It also facilitates real-time monitoring and adjustment by operators, improving production efficiency and safety.

[0048] Furthermore, the gas detection unit includes:

[0049] Oxygen concentration sensor 2 is installed inside housing 1;

[0050] The first combustible gas detection sensor 6 is installed after the first busbar 3;

[0051] The second combustible gas detection sensor 11 is installed after the two-way valve 10.

[0052] Specifically, oxygen concentration sensor 2 is used to monitor the oxygen concentration inside the casing 1. First combustible gas detection sensor 6 is used to monitor the combustible gas concentration at the initial stage of gas flow. Second combustible gas detection sensor 11 is used to monitor the concentration of processed combustible gas. By introducing gas detection units, multi-point gas concentration monitoring is achieved, forming a complete gas monitoring network. This allows for the timely detection of potential safety hazards, provides real-time data support for system operation, helps determine the system's operating status, and improves the overall system safety.

[0053] Furthermore, the detection alarm values ​​of the first combustible gas detection sensor 6 and the second combustible gas detection sensor 11 are less than 1%-3%.

[0054] Specifically, a lower alarm threshold is used to provide early warning, far below the lower explosive limit of flammable gases, allowing sufficient time margin for system response. Preferably, in this embodiment, the alarm value is set to 1%.

[0055] Furthermore, it also includes an electromagnetic control valve 19, which is connected to a host computer and is used to automatically control the flow of inert gas based on the detection data from the combustible gas detection sensor.

[0056] The electromagnetic control valve 19 is connected to the host computer, and the combustible gas detection sensor provides detection data to form an automatic control loop. The detection sensor monitors the concentration of combustible gas in real time, and the data is transmitted to the host computer for analysis. The host computer automatically controls the electromagnetic control valve 19 based on the data to achieve automatic on / off control of the inert gas.

[0057] When an increase in combustible gas concentration is detected: the solenoid control valve 19 automatically opens to replenish inert gas and dilute the combustible gas concentration. When the combustible gas concentration drops to a safe range: the solenoid control valve 19 automatically closes, stopping the inert gas replenishment. This achieves intelligent control of inert gas replenishment, ensuring timely response to dangerous situations, avoiding delays caused by human operation, and improving the automation level of system operation. It also saves on inert gas usage, further enhancing system safety.

[0058] Furthermore, the inert gas replenishment unit 20 includes an electromagnetic control valve 19, which is connected to the second manifold 7.

[0059] The electromagnetic control valve 19 is connected to the second manifold 7 to form an inert gas replenishment channel. Inert gas is replenished through the position of the second manifold 7, ensuring thorough mixing and diffusion. This achieves precise inert gas replenishment at a reasonable location, facilitating gas mixing. The electromagnetic control valve 19 enables rapid response and facilitates integration with the control system.

[0060] Furthermore, it also includes a negative pressure gauge 15 installed on the third manifold 17, a flow monitoring device 16 installed between the second manifold 7 and the third manifold 17, and a gas-liquid separator 18 installed before the filter 9.

[0061] Specifically, the negative pressure gauge 15 monitors the negative pressure status of the third manifold 17, providing real-time pressure data for easy system pressure monitoring. The flow monitoring device 16 monitors the gas flow rate, ensuring normal gas flow in the system and providing flow data for reference. The gas-liquid separator 18 separates the liquid components from the gas, protecting the downstream filter 9 and improving gas treatment efficiency. This setup enables more comprehensive system monitoring, improves the quality of gas treatment, extends the service life of the filter 9, and provides more operating parameter references.

[0062] In summary, through the coordinated operation of the negative pressure extraction unit, gas manifold unit, vacuum control unit, gas detection unit, and inert gas replenishment unit, the entire process of monitoring and handling of hazardous gases generated during the formation process is achieved. Negative pressure extraction enables directional collection, a three-stage manifold provides a stable gas transmission channel, multiple valve combinations ensure precise and controllable vacuum, multi-point gas detection enables ultra-early warning, and the intelligent control system can automatically replenish inert gas based on detection data. Furthermore, auxiliary devices such as gas-liquid separation, pressure monitoring, and flow monitoring are provided to effectively reduce the explosion risk during lithium battery formation and improve production safety.

[0063] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A battery explosion-proof formation machine, characterized by, include: The housing contains an explosion-proof chemical formation system; The explosion-proof formation system includes a negative pressure extraction unit, a gas manifold unit, a vacuum control unit, a gas detection unit, and an inert gas replenishment unit; The negative pressure pumping unit is connected to the gas manifold unit, the gas manifold unit is connected to the vacuum control unit, and the inert gas replenishment unit is connected to the gas manifold unit; the gas detection unit is located on the gas flow path.

2. The battery explosion-proof formation machine of claim 1, wherein, The negative pressure suction unit includes a negative pressure cup and a negative pressure nozzle. The negative pressure nozzle is disposed on the negative pressure cup, and the negative pressure cup is connected to the gas manifold unit.

3. The battery explosion-proof formation machine of claim 1, wherein, The gas manifold unit includes a first manifold, a second manifold, and a third manifold connected in sequence. The first manifold is connected to the negative pressure pumping unit, the second manifold is connected to the inert gas replenishment unit, and the third manifold is connected to the vacuum control unit.

4. The battery explosion-proof formation machine of claim 1, wherein, The vacuum control unit includes a vacuum breaking valve, a filter, a two-way valve, a vacuum pressure regulating valve, an electro-proportional valve, and a positive pressure regulating valve connected in sequence. The vacuum pressure regulating valve is connected to an external vacuum source, and the positive pressure regulating valve is connected to an external positive pressure source.

5. The battery explosion-proof formation machine of claim 4, wherein, The vacuum pressure regulating valve, electro-proportional valve, and positive pressure regulating valve are connected to the host computer and used to adjust different vacuum levels.

6. The battery explosion-proof formation machine as described in claim 1, characterized in that, The gas detection unit includes: An oxygen concentration sensor is installed inside the casing; The first combustible gas detection sensor is installed after the first busbar; The second combustible gas detection sensor is installed after the two-way valve.

7. The battery explosion-proof formation machine as described in claim 6, characterized in that, The detection alarm values ​​of the first combustible gas detection sensor and the second combustible gas detection sensor are less than 1%-3%.

8. The battery explosion-proof formation machine as described in claim 7, characterized in that, It also includes an electromagnetic control valve, which is connected to a host computer and is used to automatically control the flow of inert gas based on the detection data from the combustible gas detection sensor.

9. The battery explosion-proof formation machine as described in claim 1, characterized in that, The inert gas replenishment unit includes an electromagnetic control valve, which is connected to a second manifold.

10. The battery explosion-proof formation machine as described in claim 9, characterized in that, It also includes a negative pressure gauge installed on the third manifold, a flow monitoring device installed between the second manifold and the third manifold, and a gas-liquid separator installed before the filter.

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