A negative pressure restraint formation equipment system and method for aluminum shell lithium-ion batteries

Abstract

The present invention discloses a negative pressure restraint formation equipment system and method for aluminum shell lithium-ion batteries, including a control system module, a constant temperature module, a digital tube module, a tray module, an air conditioning system module, and an exhaust device module. The method communicates with the equipment through a control software system and starts, inputs the set values of temperature and humidity in the negative pressure restraint formation process, sends instructions to the air conditioning system module to adjust the internal environment of the constant temperature box, monitors the temperature in real time and feeds it back to the control software system, then places the battery on a self-clamping tray fixed by a fixture. During the formation process, calculates the pressure, temperature, and humidity parameters according to time steps, determines whether they exceed the set range, and takes corresponding measures such as stopping the formation process or adjusting the temperature and humidity. After the end, generates a report to ensure the stable operation of the equipment and the accurate control of the formation process.

Description

Technical Field

[0001] The present invention relates to the technical field of battery restraint constant temperature, and in particular to a negative pressure restraint formation equipment system and method for aluminum shell lithium-ion batteries. Background Art

[0002] Aluminum shell lithium-ion batteries are a type of battery widely used in industrial production processes. They consist of a positive electrode, a negative electrode, a separator, and an electrolyte, with an aluminum alloy shell as the outer casing. Compared with other types of lithium-ion batteries, aluminum shell lithium-ion batteries have higher energy density, longer cycle life, and better safety performance.

[0003] In order to improve the performance and safety of the battery, negative pressure restraint formation treatment is required for the battery. This negative pressure restraint formation equipment system includes a control system module, a constant temperature module, a digital tube module, a tray module, an air conditioning system module, and an exhaust device module.

[0004] The control system module is responsible for controlling and monitoring the entire negative pressure restraint formation equipment, and through the control software system, realizes communication and instruction transmission with other modules.

[0005] The constant temperature module provides a constant temperature environment, monitors the temperature in real time through a sensor, and feeds it back to the control software system to ensure that the battery is formed within an appropriate temperature range.

[0006] The digital tube module is used to input parameters and instructions, such as the set temperature, humidity, etc. The operator inputs the required parameters through the digital tube keyboard, which is convenient for setting the conditions of the formation process.

[0007] Tray module: Accommodates aluminum shell lithium-ion batteries and fixes them. The fixture prevents the batteries from moving during the formation process through the clamping force (F_h).

[0008] The air conditioning system module controls the temperature and humidity of the constant temperature box. According to the input set value and the actual value feedback by the sensor, heating or cooling operations can be performed to adjust the temperature, and the required humidity level can be maintained through the humidity controller.

[0009] The exhaust device module discharges the waste gas generated during the negative pressure restraint formation process. The flow sensor monitors the exhaust volume in real time to ensure good ventilation effect.

[0010] The invention mainly provides a comprehensive negative pressure restraint formation equipment system, which can stably control and monitor parameters such as temperature, humidity, and pressure during the battery formation process to ensure safety and quality.

[0011] The present invention aims to solve the disadvantages:

[0012] The control software system can monitor and judge parameters such as pressure, temperature, and humidity, make judgments through preset judgment conditions, and take corresponding measures. For example, when the pressure exceeds the set maximum value (P_max) or is lower than the minimum value (P_min), the system will send an alarm and stop the formation process, and adjust the temperature or exhaust volume of the thermostat to increase the pressure, avoiding adverse effects on the battery due to excessive or too low pressure;

[0013] Similarly, the control software system can monitor and judge temperature and humidity. When the temperature or humidity exceeds the set maximum value (T_max or H_max) or is lower than the minimum value (T_min or H_min), the system will send an alarm and stop the formation process, and adjust the temperature, humidity, or exhaust volume of the thermostat to increase the temperature or humidity, ensuring that the battery is formed under suitable environmental conditions;

[0014] After the negative pressure constrained formation process ends, the control software system will generate corresponding reports and records, including information such as the status, parameters, and quality of the battery for subsequent analysis and evaluation;

[0015] Realize precise control and monitoring of the negative pressure constrained formation process of aluminum shell lithium-ion batteries, improving the safety and quality stability of the formation process. Summary of the Invention

[0016] The present invention provides a negative pressure constrained formation equipment system and method for aluminum shell lithium-ion batteries to solve the above-mentioned existing technical problems.

[0017] The technical solution of the present invention is realized as follows: A negative pressure constrained formation equipment system for aluminum shell lithium-ion batteries includes a control system module, a thermostat module, a digital tube module, a tray module, an air conditioning system module, and an exhaust device module;

[0018] The control system module is connected to the thermostat module, the digital tube module, the tray module, the air conditioning system module, and the exhaust device module for realizing the control and monitoring of the entire negative pressure constrained formation equipment;

[0019] The thermostat module is connected to the control system module, the digital tube module, and the air conditioning system module for providing a constant temperature environment, and the temperature is monitored in real time by a sensor and fed back to the control software system;

[0020] The digital tube module is connected to the control system module, the thermostat module, and the air conditioning system module for inputting parameters and instructions, including the set temperature, humidity, etc.;

[0021] The tray module is connected to the control system module for accommodating aluminum shell lithium-ion batteries and having a fixture and a heat-insulating glass door. The fixture fixes the battery by the clamping force (F_h) to prevent it from moving;

[0022] The air-conditioning system module is connected to the control system module, the thermostat module, and the digital tube module, and is used to control the temperature and humidity of the constant temperature box. According to the input set value and the actual value feedback by the sensor, the control system takes heating or cooling operations to adjust the temperature, and maintains the required humidity level through the humidity controller;

[0023] The exhaust device module is connected to the control system module and is used to discharge the waste gas generated during the negative pressure restraint forming process. The exhaust volume is monitored in real time by a flow sensor to ensure good ventilation effect.

[0024] A method for negative pressure restraint forming equipment of aluminum shell lithium-ion batteries:

[0025] S1. Start the control software system, ensure connection with the equipment and communication;

[0026] S2. Input the required parameters through the digital tube keyboard, such as the set values of temperature (T_set) and humidity (H_set) during the negative pressure restraint forming process;

[0027] S3. The control software system sends instructions to the air-conditioning system module according to the input parameters, so that it adjusts the internal environment of the constant temperature box to reach the set value;

[0028] S4. Place the aluminum shell lithium-ion battery on the self-clamping tray and fix it with a fixture. The clamping force (F_h) of the fixture is calculated according to the battery specifications and equipment requirements;

[0029] S5. The control software system sends instructions to the exhaust device mechanism to start the exhaust process to ensure that the waste gas generated during the negative pressure restraint forming process can be discharged in time;

[0030] S6. Start the negative pressure restraint forming process, and perform the following calculations at each time step (t):

[0031] Calculation of pressure (P): P = (F_h + F_v) / A

[0032] P: Pressure, unit is Pascal (Pa)

[0033] F_h: Clamping force of the fixture, unit is Newton (N)

[0034] F_v: Negative pressure perpendicular to the battery surface, set according to design requirements, unit is Newton (N)

[0035] A: Area of the battery surface, unit is square meter (m 2 )

[0036] Calculation of temperature (T): T = T_initial+(t*dT)

[0037] T: Temperature, in degrees Celsius (°C)

[0038] T_initial: Initial temperature, in degrees Celsius (°C)

[0039] t: Time step, in seconds (s)

[0040] dT: Temperature change rate, calculated according to the equipment performance and requirements, in degrees Celsius per second (°C / s)

[0041] Calculation of humidity (H): H = H_initial - (t * dH)

[0042] H: Humidity, in percentage (%RH)

[0043] H_initial: Initial humidity, in percentage (%RH)

[0044] t: Time step, in seconds (s)

[0045] dH: Humidity change rate, calculated according to the equipment performance and requirements, in percentage per second (%RH / s);

[0046] Based on the calculated parameters such as pressure, temperature, and humidity, the control software system is used for monitoring and judgment:

[0047] Pressure judgment condition:

[0048] If P > P_max:

[0049] Send an alarm and stop the negative pressure confinement forming process

[0050] If P < P_min:

[0051] Adjust the temperature of the incubator or the exhaust volume to increase the pressure;

[0052] Temperature judgment condition:

[0053] If T > T_max:

[0054] Send an alarm and stop the negative pressure confinement forming process

[0055] If T < T_min:

[0056] Adjust the temperature of the incubator or the exhaust volume to increase the temperature;

[0057] Humidity judgment condition:

[0058] If H > H_max:

[0059] Send an alarm and stop the negative pressure confinement forming process

[0060] If H < H_min:

[0061] Adjust the humidity or exhaust volume of the incubator to increase humidity;

[0062] Based on the preset judgment conditions, the control software system sends an alarm and takes corresponding measures, such as stopping the negative pressure restraint formation process or adjusting the temperature, humidity or exhaust volume of the constant temperature chamber;

[0063] After the negative pressure restraint formation process is completed, the control software system generates corresponding reports and records, including the battery status, parameters and quality.

[0064] Furthermore, the implementation process of the method for substituting preset data into the negative pressure restraint formation equipment for aluminum shell lithium ion batteries is as follows:

[0065] Preset data:

[0066] Initial temperature (T_initial) = 25°C

[0067] Temperature change rate (dT) = 0.5°C / s

[0068] Initial humidity (H_initial) = 60% RH

[0069] Humidity change rate (dH) = -0.2% RH / s

[0070] Clamping force (F_h) = 200N

[0071] Negative pressure perpendicular to the battery surface (F_v) = 100N

[0072] Battery surface area (A) = 0.02m 2

[0073] The formation process was carried out for 20 seconds, with one time step per second.

[0074] According to the given parameters and formula, the following calculations are performed:

[0075] Pressure calculation: At each time step, the pressure is calculated using the pressure calculation formula P = (F_h + F_v) / A;

[0076] Time step 1: P_1 = (200N + 100N) / 0.02m 2 =15000Pa

[0077] Time step 2: P_2 = (200N + 100N) / 0.02m 2 =15000Pa...

[0078] Time step 20: P_20 = (200N + 100N) / 0.02m 2 =15000Pa

[0079] Temperature calculation: In each time step, the temperature is calculated using the temperature calculation formula T = T_initial+(t*dT);

[0080] Time step 1: T_1 = 25°C+(1s * 0.5°C / s)=25.5°C

[0081] Time step 2: T_2 = 25°C+(2s * 0.5°C / s)=26°C...

[0082] Time step 20: T_20 = 25°C+(20s * 0.5°C / s)=35°C

[0083] Humidity calculation: In each time step, the humidity is calculated using the humidity calculation formula H = H_initial-(t*dH);

[0084] Time step 1: H_1 = 60%RH-(1s * -0.2%RH / s)=59.8%RH

[0085] Time step 2: H_2 = 60%RH-(2s * -0.2%RH / s)=59.6%RH...

[0086] Time step 20: H_20 = 60%RH-(20s * -0.2%RH / s)=63.8%RH

[0087] Based on the calculated parameters such as pressure, temperature, and humidity, judgment and control are carried out:

[0088] Pressure judgment condition: The maximum pressure (P_max) is 20000 Pa, and the minimum pressure (P_min) is 10000 Pa;

[0089] If P_20 > P_max, send an alarm and stop the forming process;

[0090] If P_20 < P_min, adjust the temperature or exhaust volume of the thermostat to increase the pressure;

[0091] Temperature judgment condition: The maximum temperature (T_max) is 40°C, and the minimum temperature (T_min) is 20°C;

[0092] If T_20 > T_max, send an alarm and stop the forming process;

[0093] If T_20 < T_min, adjust the temperature or exhaust volume of the thermostat to increase the temperature;

[0094] Humidity judgment condition: The maximum humidity (H_max) is 70%RH, and the minimum humidity (H_min) is 50%RH;

[0095] If H_20 > H_max, send an alarm and stop the forming process;

[0096] If H_20 < H_min, adjust the humidity or exhaust volume of the incubator to increase the humidity;

[0097] Through the above calculations and judgment conditions, according to the preset data, control and monitor the negative pressure confinement forming process. If it is found that the preset judgment conditions are exceeded in a certain time step, the control software system will send an alarm accordingly and take corresponding measures to ensure the safety and quality of the forming process.

[0098] Furthermore, the control system module communicates with the thermostat module, the digital tube module, the tray module, the air conditioning system module, and the exhaust device module through data connections, and realizes real-time data transmission and interaction.

[0099] Furthermore, the control system module detects the temperature inside the incubator through a sensor and makes judgments and adjustments according to the set temperature range.

[0100] Furthermore, the digital tube module includes a display screen and an operation keyboard, which are used to input and adjust parameters such as the set temperature and humidity, and to display the current parameter values and status information in real time.

[0101] Furthermore, the tray module has a self-clamping design, and the built-in fixture is adjusted according to the size and shape of the battery, and firmly fixes the battery in the incubator through an adjustable clamping force (F_h).

[0102] Furthermore, the air conditioning system module includes a temperature and humidity controller, according to the instructions of the control software system.

[0103] Furthermore, the exhaust device module is provided with an exhaust pipe and a flow sensor, which are used to timely discharge the waste gas generated during the negative pressure confinement forming process according to the instructions of the control system module, and monitor the exhaust volume through the flow sensor.

[0104] Furthermore, in the negative pressure confinement forming of the method for an aluminum shell lithium-ion battery negative pressure confinement forming device, according to the calculation formula of each time step, including the calculation of pressure (P), temperature (T), and humidity (H), the real-time parameter values are obtained for monitoring and controlling the state of the forming process.

[0105] Furthermore, in the method for an aluminum shell lithium-ion battery negative pressure confinement forming device, according to the preset pressure, temperature, and humidity ranges, the control software system judges and compares the real-time parameters. If the preset range is exceeded, an alarm will be sent and corresponding control strategies will be taken, such as stopping the forming process, adjusting the temperature or humidity of the incubator.

[0106] Beneficial Effects

[0107] Improve battery formation quality. Through precise control of the constant temperature module and air conditioning system module, a constant temperature and humidity environment is maintained, ensuring that the battery is formed under optimal conditions. This helps to improve the chemical properties and stability of the battery and minimize the degradation of battery performance caused by defects or poor formation.

[0108] Enhanced safety: The control system module monitors and determines pressure in real time, preventing adverse effects on the battery caused by excessively high or low pressure. In addition, temperature and humidity monitoring and control prevent battery overheating and over-humidity, effectively improving battery safety during use.

[0109] Improve operational efficiency and convenience: The presence of the digital tube module enables operators to easily input the required parameters and instructions, such as set temperature, humidity, etc., which simplifies the operation process and improves the accuracy and efficiency of the operation. In addition, through the intelligent control system and self-clamping tray design, the loading and fixing of batteries becomes more convenient and faster;

[0110] Reducing the impact of human subjective factors through intelligent supervision and decision-making assistance can reduce dependence on the technical level of operation and maintenance personnel and improve the reliability and consistency of operations;

[0111] Improve the controllability and stability of the negative pressure restraint formation process. Through real-time monitoring and adjustment of the exhaust device module, ensure that the waste gas generated during the negative pressure restraint formation process can be discharged in time, ensuring good ventilation effect, which helps to maintain a constant negative pressure environment and improve the controllability and stability of the formation process.

[0112] In summary, the negative pressure restraint formation equipment system for aluminum-shell lithium-ion batteries improves the quality and safety of battery formation through precise temperature, humidity and pressure control, while enhancing operational efficiency and convenience, reducing the influence of human subjective factors, and improving the controllability and stability of the negative pressure restraint formation process. This has important benefits for the production and application of aluminum-shell lithium-ion batteries and promotes the development and innovation of the industry.

[0113] Working principle:

[0114] First, start the control software system to ensure that it is connected and communicating with the equipment. Then, enter the required parameters through the digital tube keyboard, such as the temperature (T_set) and humidity (H_set) set values for the negative pressure restraint forming process;

[0115] The control software system sends instructions to the air-conditioning system module according to the input parameters, so that it adjusts the internal environment of the incubator to reach the set value. The temperature control module provides a constant temperature environment. The temperature is monitored in real time by the sensor and fed back to the control software system;

[0116] Next, place the aluminum shell lithium-ion battery on the self-clamping tray and fix it with a fixture. The clamping force (F_h) of the fixture is calculated according to the battery specifications and equipment requirements;

[0117] At the same time, the exhaust device module is connected to the control system module to discharge the waste gas generated during the negative pressure constrained formation process. The exhaust volume is monitored in real time by the flow sensor to ensure good ventilation effect;

[0118] During the negative pressure constrained formation process, according to the time step (t), parameters such as pressure, temperature and humidity are calculated. The formula for pressure is P = (F_h + F_v) / A, where F_h is the clamping force of the fixture, F_v is the negative pressure perpendicular to the battery surface, and A is the surface area of the battery. The formula for temperature is T = T_initial + (t * dT), where T_initial is the initial temperature and dT is the temperature change rate. The formula for humidity is H = H_initial - (t * dH), where H_initial is the initial humidity and dH is the humidity change rate;

[0119] According to the calculated parameters such as pressure, temperature and humidity, the control software system monitors and judges. If the pressure exceeds the set maximum value (P_max) or is lower than the minimum value (P_min), an alarm is sent and the negative pressure constrained formation process is stopped. If the temperature exceeds the maximum value (T_max) or is lower than the minimum value (T_min), an alarm is sent and the formation process is stopped. If the humidity exceeds the maximum value (H_max) or is lower than the minimum value (H_min), an alarm is also sent and the formation process is stopped. According to the preset judgment conditions, the control software system takes corresponding measures, such as adjusting the temperature, humidity or exhaust volume of the incubator, etc.;

[0120] After the negative pressure constrained formation process is completed, the control software system generates corresponding reports and records, including the status, parameters and quality of the battery, etc. These reports and records are very important for subsequent analysis and evaluation. The entire work process is realized through the connection and collaborative work among the control system module, temperature control module, digital tube module, tray module, air-conditioning system module and exhaust device module, ensuring the stable operation of the negative pressure constrained formation equipment and the accurate control of the formation process. Description of the Drawings

[0121] Figure 1 It is a structural block diagram of a negative pressure constrained formation equipment system for aluminum shell lithium-ion batteries in an embodiment of the present invention;

[0122] Figure 2 This is the block diagram of the steps of a method for a negative pressure restraint formation device for aluminum shell lithium-ion batteries in an embodiment of the present invention;

[0123] Figure 3 This is the three-dimensional view schematic diagram of the constant temperature box in an embodiment of the present invention;

[0124] Figure 4 This is the front view schematic diagram of the constant temperature box in an embodiment of the present invention;

[0125] Figure 5 This is the sectional view positioning diagram of the right view A-A of the constant temperature box in an embodiment of the present invention;

[0126] Figure 6 This is the schematic diagram of the tray module structure of the A-A sectional view in an embodiment of the present invention.

[0127] 1 - Pole piece contact point, 2 - Fixture, 3 - Self-clamping tray, 4 - Clip, 5 - Slide bar, 6 - Telescopic mechanism. Detailed implementation manners

[0128] In order to make the purpose and advantages of the present invention clearer, the present invention will be further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0129] The preferred implementation methods of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these implementation methods are only used to explain the technical principles of the present invention and do not limit the protection scope of the present invention.

[0130] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0131] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0132] Please refer to Figure 1-6As shown in the figure, a negative pressure confinement formation equipment system and method for aluminum shell lithium-ion batteries include: a negative pressure confinement formation equipment system for aluminum shell lithium-ion batteries, including a control system module, a constant temperature module, a digital tube module, a tray module, an air conditioning system module, and an exhaust device module;

[0133] The control system module is connected to the constant temperature module, the digital tube module, the tray module, the air conditioning system module, and the exhaust device module, and is used to control and monitor the entire negative pressure confinement formation equipment;

[0134] The constant temperature module is connected to the control system module, the digital tube module, and the air conditioning system module, and is used to provide a constant temperature environment. The temperature is monitored in real time by a sensor and fed back to the control software system;

[0135] The digital tube module is connected to the control system module, the constant temperature module, and the air conditioning system module, and is used to input parameters and instructions, including the set temperature, humidity, etc.;

[0136] The tray module is connected to the control system module and is used to accommodate aluminum shell lithium-ion batteries, and has a fixture and a heat-insulating glass door. The fixture fixes the battery by the clamping force (F_h) to prevent it from moving;

[0137] The air conditioning system module is connected to the control system module, the constant temperature module, and the digital tube module, and is used to control the temperature and humidity of the constant temperature box. According to the input set value and the actual value feedback by the sensor, the control system can take heating or cooling operations to adjust the temperature, and maintain the required humidity level through a humidity controller;

[0138] The exhaust device module is connected to the control system module and is used to discharge the waste gas generated during the negative pressure confinement formation process. The exhaust volume is monitored in real time by a flow sensor to ensure good ventilation effect.

[0139] A method for the negative pressure confinement formation equipment of aluminum shell lithium-ion batteries:

[0140] S1. Start the control software system, ensure connection with the equipment and communication;

[0141] S2. Input the required parameters through the digital tube keyboard, such as the set values of the temperature (T_set) and humidity (H_set) during the negative pressure confinement formation process;

[0142] S3. The control software system sends instructions to the air conditioning system module according to the input parameters to adjust the internal environment of the constant temperature box to the set value;

[0143] S4. Place the aluminum shell lithium-ion battery on the self-clamping tray and fix it with a fixture. The clamping force (F_h) of the fixture is calculated according to the battery specifications and equipment requirements;

[0144] S5. The control software system sends an instruction to the exhaust device mechanism to start the exhaust process, ensuring that the waste gas generated during the negative pressure confinement forming process can be discharged in a timely manner;

[0145] S6. Start the negative pressure confinement forming process and perform the following calculations at each time step (t):

[0146] Calculation of pressure (P): P = (F_h + F_v) / A

[0147] P: Pressure, unit is Pascal (Pa)

[0148] F_h: Clamping force of the fixture, unit is Newton (N)

[0149] F_v: Negative pressure perpendicular to the battery surface, set according to design requirements, unit is Newton (N)

[0150] A: Area of the battery surface, unit is square meter (m 2 )

[0151] Calculation of temperature (T): T = T_initial+(t * dT)

[0152] T: Temperature, unit is degree Celsius (°C)

[0153] T_initial: Initial temperature, unit is degree Celsius (°C)

[0154] t: Time step, unit is second (s)

[0155] dT: Temperature change rate, calculated according to the equipment performance and requirements, unit is degree Celsius per second (°C / s)

[0156] Calculation of humidity (H): H = H_initial-(t * dH)

[0157] H: Humidity, unit is percentage (%RH)

[0158] H_initial: Initial humidity, unit is percentage (%RH)

[0159] t: Time step, unit is second (s)

[0160] dH: Humidity change rate, calculated according to the equipment performance and requirements, unit is percentage per second (%RH / s);

[0161] According to the calculated parameters such as pressure, temperature, and humidity, the control software system conducts monitoring and judgment:

[0162] Pressure judgment condition:

[0163] If P > P_max:

[0164] Send an alarm and stop the negative pressure confinement forming process

[0165] If P < P_min:

[0166] Adjust the temperature or exhaust volume of the incubator to increase the pressure;

[0167] Temperature judgment condition:

[0168] If T > T_max:

[0169] Send an alarm and stop the negative pressure confinement forming process

[0170] If T < T_min:

[0171] Adjust the temperature or exhaust volume of the incubator to increase the temperature;

[0172] Humidity judgment condition:

[0173] If H > H_max:

[0174] Send an alarm and stop the negative pressure confinement forming process

[0175] If H < H_min:

[0176] Adjust the humidity or exhaust volume of the incubator to increase the humidity;

[0177] According to the preset judgment conditions, the control software system sends an alarm and takes corresponding measures, such as stopping the negative pressure confinement forming process or adjusting the temperature, humidity or exhaust volume of the incubator;

[0178] After the negative pressure confinement forming process ends, the control software system generates corresponding reports and records, including the status, parameters and quality of the battery.

[0179] Specifically, the implementation process of substituting the preset data into the method for the negative pressure confinement forming equipment of aluminum shell lithium-ion batteries is as follows:

[0180] Preset data:

[0181] Initial temperature (T_initial) = 25°C

[0182] Temperature change rate (dT) = 0.5°C / s

[0183] Initial humidity (H_initial) = 60%RH

[0184] Humidity change rate (dH) = -0.2%RH / s

[0185] Clamping force (F_h) = 200N

[0186] Negative pressure perpendicular to the battery surface (F_v) = 100N

[0187] Battery surface area (A) = 0.02m 2

[0188] The formation process was carried out for 20 seconds, with one time step per second.

[0189] According to the given parameters and formula, the following calculations are performed:

[0190] Pressure calculation: At each time step, the pressure is calculated using the pressure calculation formula P = (F_h + F_v) / A;

[0191] Time step 1: P_1 = (200N + 100N) / 0.02m 2 =15000Pa

[0192] Time step 2: P_2 = (200N + 100N) / 0.02m 2 =15000Pa...

[0193] Time step 20: P_20 = (200N + 100N) / 0.02m 2 =15000Pa

[0194] Temperature calculation: At each time step, the temperature is calculated using the temperature calculation formula T = T_initial + (t*dT);

[0195] Time step 1: T_1 = 25°C + (1s*0.5°C / s) = 25.5°C

[0196] Time step 2: T_2 = 25°C + (2s * 0.5°C / s) = 26°C...

[0197] Time step 20: T_20 = 25°C + (20s * 0.5°C / s) = 35°C

[0198] Humidity calculation: At each time step, the humidity is calculated using the humidity calculation formula H = H_initial - (t*dH);

[0199] Time step 1: H_1 = 60% RH - (1s* - 0.2% RH / s) = 59.8% RH

[0200] Time step 2: H_2 = 60% RH - (2s* - 0.2% RH / s) = 59.6% RH...

[0201] Time step 20: H_20 = 60% RH - (20s* - 0.2% RH / s) = 63.8% RH

[0202] Based on the calculated parameters such as pressure, temperature, and humidity, perform judgment and control:

[0203] Pressure judgment condition: The maximum pressure (P_max) is 20000 Pa, and the minimum pressure (P_min) is 10000 Pa;

[0204] If P_20 > P_max, send an alarm and stop the forming process;

[0205] If P_20 < P_min, adjust the temperature of the thermostat or the exhaust volume to increase the pressure;

[0206] Temperature judgment condition: The maximum temperature (T_max) is 40 °C, and the minimum temperature (T_min) is 20 °C;

[0207] If T_20 > T_max, send an alarm and stop the forming process;

[0208] If T_20 < T_min, adjust the temperature of the thermostat or the exhaust volume to increase the temperature;

[0209] Humidity judgment condition: The maximum humidity (H_max) is 70% RH, and the minimum humidity (H_min) is 50% RH;

[0210] If H_20 > H_max, send an alarm and stop the forming process;

[0211] If H_20 < H_min, adjust the humidity of the thermostat or the exhaust volume to increase the humidity;

[0212] Through the above calculations and judgment conditions, according to the preset data, control and monitor the negative pressure confinement forming process. If it is found that the preset judgment conditions are exceeded in a certain time step, the control software system will accordingly send an alarm and take corresponding measures to ensure the safety and quality of the forming process.

[0213] Specifically, the control system module communicates with the thermostat module, digital tube module, tray module, air conditioning system module, and exhaust device module through data connections, and realizes real-time data transmission and interaction.

[0214] Specifically, the control system module detects the temperature inside the thermostat through a sensor and makes judgments and adjustments according to the set temperature range.

[0215] Specifically, the digital tube module includes a display screen and an operation keyboard, which are used to input and adjust parameters such as the set temperature and humidity, and to display the current parameter values and status information in real time.

[0216] Specifically, the tray module has a self-clamping design, with built-in clamps that adjust according to the battery size and shape, and firmly fix the battery in the constant temperature box with an adjustable clamping force (F_h).

[0217] Specifically, the air conditioning system module includes temperature and humidity controllers according to the instructions of the control software system.

[0218] Specifically, the exhaust device module is provided with an exhaust pipe and a flow sensor, which is used to discharge the waste gas generated during the negative pressure restraint formation process in a timely manner according to the instructions of the control system module, and monitor the exhaust volume through the flow sensor.

[0219] Specifically, the method for negative pressure restraint formation equipment of aluminum shell lithium ion batteries, during negative pressure restraint formation, obtains real-time parameter values according to the calculation formula of each time step, including the calculation of pressure (P), temperature (T) and humidity (H), for monitoring and controlling the state of the formation process.

[0220] Specifically, the method for negative pressure restraint formation equipment of aluminum shell lithium-ion batteries is described. According to the preset pressure, temperature and humidity ranges, the control software system judges and compares the real-time parameters. If the preset ranges are exceeded, an alarm is sent and corresponding control strategies are adopted, such as stopping the formation process and adjusting the temperature or humidity of the constant temperature box.

[0221] Example 1, please refer to Figure 1-2 ,In the temperature control scenario, the present invention works as follows: Problem to be solved: When the temperature exceeds the preset range during the formation process, timely adjustment is required;

[0222] Solution:

[0223] The initial temperature (T_initial) was set to 25°C and the temperature change rate (dT) was set to 0.5°C / s.

[0224] At each time step, the current temperature value is calculated according to the temperature calculation formula T=T_initial+(t*dT).

[0225] Use sensors to monitor the temperature inside the thermostat in real time and feed it back to the control software system;

[0226] The control software system compares the actual temperature with the preset maximum temperature (T_max) and minimum temperature (T_min);

[0227] If the temperature at a certain time step exceeds T_max, an alarm is sent and the formation process is stopped;

[0228] If the temperature at a certain time step is lower than T_min, adjust the heating or cooling function of the thermostat to increase the temperature;

[0229] The adjusted temperature will be detected and monitored again until the set requirements are met.

[0230] Working principle:

[0231] By setting the initial temperature and the temperature change rate, and combining with the judgment conditions of the real-time monitoring and control software system, the temperature inside the incubator is regulated. Through continuous calculation and adjustment, it is ensured that the temperature during the formation process is always within the safe range, so as to improve the formation quality and stability of the battery.

[0232] Example of the calculation process:

[0233] The formation process was carried out for 20 seconds, with each second as a time step;

[0234] Initial temperature (T_initial) = 25 °C

[0235] Temperature change rate (dT) = 0.5 °C / s

[0236] According to the temperature calculation formula T = T_initial+(t*dT), the temperature value of each time step can be calculated:

[0237] Time step 1: T_1 = 25 °C+(1 s * 0.5 °C / s) = 25.5 °C

[0238] Time step 2: T_2 = 25 °C+(2 s * 0.5 °C / s) = 26 °C...

[0239] Time step 20: T_20 = 25 °C+(20 s * 0.5 °C / s) = 35 °C

[0240] By real-time monitoring of the current temperature value and comparing it with the preset maximum temperature (T_max) and minimum temperature (T_min), if it exceeds or is lower than the set range, corresponding control measures will be taken, such as sending an alarm, stopping the formation process, or adjusting the heating or cooling function of the incubator to keep the temperature within a reasonable range.

[0241] Example 2. Please refer to Figure 1-2 , in the pressure monitoring and control scenario, the present invention works as follows: Problem to be solved: Abnormal pressure during the negative pressure restraint formation process requires monitoring and control;

[0242] Solution:

[0243] Set the clamping force (F_h) of the fixture to 200 N, the negative pressure (F_v) perpendicular to the battery surface to 100 N, and the area (A) of the battery surface to 0.02 m 2 ;

[0244] At each time step, the current pressure value is calculated using the pressure calculation formula P = (F_h + F_v) / A;

[0245] Use a sensor to monitor the pressure generated during the negative pressure confinement forming process in real time and feed it back to the control software system;

[0246] The control software system makes a comparison and judgment based on the actual pressure and the preset maximum pressure (P_max) and minimum pressure (P_min);

[0247] If the pressure at a certain time step exceeds P_max, an alarm is sent and the forming process is stopped;

[0248] If the pressure at a certain time step is lower than P_min, adjust the exhaust volume of the incubator to increase the pressure;

[0249] The adjusted pressure will be detected and monitored again until the set requirements are met.

[0250] Working principle:

[0251] By setting the fixture clamping force, vertical negative pressure, and the area of the battery surface, and combining the judgment conditions of the real-time monitoring and control software system, the monitoring and regulation of the pressure during the negative pressure confinement forming process are realized. Through continuous calculation and adjustment, it is ensured that the pressure during the forming process is always within the safe range to improve the forming quality and stability of the battery.

[0252] Calculation process example:

[0253] A forming process of 20 seconds is carried out, with each second as a time step;

[0254] Clamping force (F_h) = 200N

[0255] Vertical negative pressure (F_v) = 100N

[0256] Area of the battery surface (A) = 0.02m 2

[0257] According to the pressure calculation formula P = (F_h + F_v) / A, the pressure value of each time step can be calculated:

[0258] Time step 1: P_1 = (200N + 100N) / 0.02m 2 = 15000Pa

[0259] Time step 2: P_2 = (200N + 100N) / 0.02m 2 = 15000Pa...

[0260] Time step 20: P_20 = (200N + 100N) / 0.02m2 = 15000 Pa

[0261] By continuously monitoring the current pressure value and comparing it with the preset maximum pressure (P_max) and minimum pressure (P_min), if it exceeds or is lower than the set range, corresponding control measures are taken, such as sending an alarm, stopping the formation process, or adjusting the exhaust volume of the incubator to increase the pressure so that the pressure remains within a reasonable range.

[0262] Example 3: Please refer to Figure 1-2 , in the humidity control scenario, the present invention works as follows: Problem to be solved: During the negative pressure constrained formation process, the humidity exceeds the preset range and needs to be controlled and adjusted;

[0263] Solution:

[0264] Set the initial humidity (H_initial) to 60% RH and the humidity change rate (dH) to -0.2% RH / s.

[0265] At each time step, use the humidity calculation formula H = H_initial - (t * dH) to calculate the current humidity value;

[0266] Use a sensor to continuously monitor the humidity inside the incubator and feed it back to the control software system;

[0267] The control software system makes a comparison and judgment based on the actual humidity and the preset maximum humidity (H_max) and minimum humidity (H_min);

[0268] If the humidity at a certain time step exceeds H_max, send an alarm and stop the formation process;

[0269] If the humidity at a certain time step is lower than H_min, adjust the humidification or exhaust function of the incubator to increase the humidity;

[0270] The adjusted humidity will be detected and monitored again until the set requirements are met.

[0271] Working principle:

[0272] By setting the initial humidity and humidity change rate, and combining with the real-time monitoring and judgment conditions of the control software system, the humidity inside the incubator is controlled and adjusted. Through continuous calculation and adjustment, it is ensured that the humidity during the formation process is always within a safe range to improve the formation quality and stability of the battery.

[0273] Example of the calculation process:

[0274] The formation process was carried out for 20 seconds, with each second as a time step;

[0275] Initial humidity (H_initial) = 60% RH

[0276] Humidity change rate (dH) = -0.2% RH / s

[0277] According to the humidity calculation formula H = H_initial-(t*dH), the humidity value of each time step can be calculated:

[0278] Time step 1: H_1 = 60% RH - (1s* - 0.2% RH / s) = 59.8% RH

[0279] Time step 2: H_2 = 60% RH - (2s* - 0.2% RH / s) = 59.6% RH...

[0280] Time step 20: H_20 = 60% RH - (20s* - 0.2% RH / s) = 63.8% RH

[0281] By monitoring the current humidity value in real time and comparing it with the preset maximum humidity (H_max) and minimum humidity (H_min), if it exceeds or falls below the set range, corresponding control measures are taken, such as sending an alarm, stopping the formation process, or adjusting the humidification or exhaust function of the constant temperature box to keep the humidity within a reasonable range.

[0282] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

[0283] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A method for negative pressure constrained formation of aluminum shell lithium-ion batteries, characterized in that: S1. Start the control software system, ensure connection with the device and conduct communication; S2. Input the required parameters through the digital tube keyboard, and the required parameters include the set values of temperature T_set and humidity H_set during the negative pressure constrained formation process; S3. The control software system sends instructions to the air conditioning system module according to the input parameters to adjust the internal environment of the constant temperature box to reach the set value; S4. Place the aluminum shell lithium-ion battery on the self-clamping tray and fix it with a fixture. The clamping force F_h of the fixture is calculated according to the battery specifications and equipment requirements; S5. The control software system sends instructions to the exhaust device mechanism to start the exhaust process to ensure that the waste gas generated during the negative pressure constrained formation process can be discharged in time; S6. Start the negative pressure constrained formation process, and perform the following calculations at each time step (t): Calculation of pressure P: P = (F_h + F_v) / A P: Pressure, unit is Pascal (Pa); F_h: Clamping force of the fixture, unit is Newton (N); F_v: Negative pressure perpendicular to the battery surface, set according to the design requirements, unit is Newton (N); A: Area of the battery surface, unit is square meter (m²); Calculation of temperature (T): T = T_initial + (t * dT) T: Temperature, unit is degree Celsius (℃); T_initial: Initial temperature, unit is degree Celsius (℃); t: Time step, unit is second (s); dT: Temperature change rate, calculated according to the equipment performance and requirements, unit is degree Celsius per second (℃ / s); Calculation of humidity (H): H = H_initial - (t * dH) H: Humidity, unit is percentage (%RH); H_initial: Initial humidity, unit is percentage (%RH); t: Time step, unit is second (s); dH: Humidity change rate, calculated according to the equipment performance and requirements, unit is percentage per second (%RH / s); According to the calculated pressure, temperature and humidity parameters, the control software system conducts monitoring and judgment: Pressure judgment conditions: If P > P_max, where P_max is the maximum pressure value: Send an alarm and stop the negative pressure constrained formation process; If P < P_min, where P_min is the minimum pressure value: Adjust the temperature of the constant temperature box or the exhaust volume to increase the pressure; Temperature judgment conditions: If T > T_max, where T_max is the maximum temperature value: Send an alarm and stop the negative pressure constrained formation process; If T < T_min, where T_min is the minimum temperature value: [[ID= ​ ​ ​ ​ ​ 2. A negative pressure restraint forming method for aluminum shell lithium-ion batteries according to claim 1, characterized in that: In negative pressure constrained formation, according to the calculation formulas for each time step, including the calculation of pressure P, temperature T, and humidity H, real-time parameter values are obtained for monitoring and controlling the state of the formation process.

3. A negative pressure restraint forming method for aluminum shell lithium-ion batteries according to claim 1, characterized in that: According to the preset pressure, temperature, and humidity ranges, the control software system judges and compares the real-time parameters. If they exceed the preset ranges, an alarm is sent and corresponding control strategies are taken. The control strategies include stopping the formation process, adjusting the temperature or humidity of the incubator.

4. An equipment system for implementing the negative pressure restraint formation method for an aluminum-shell lithium-ion battery according to any one of claims 1-3, characterized in that: It includes a control system module, a constant temperature module, a digital tube module, a tray module, an air conditioning system module, and an exhaust device module; The control system module is connected to the constant temperature module, the digital tube module, the tray module, the air conditioning system module, and the exhaust device module, and is used to control and monitor the entire negative pressure constrained formation equipment; The constant temperature module is connected to the control system module, the digital tube module, and the air conditioning system module, and is used to provide a constant temperature environment. The temperature is monitored in real time by a sensor and fed back to the control software system; The digital tube module is connected to the control system module, the constant temperature module, and the air conditioning system module, and is used to input parameters and instructions, including the set temperature and humidity; The tray module is connected to the control system module and is used to accommodate lithium-ion batteries in aluminum cases and has a fixture and a heat-insulating glass door. The fixture fixes the battery by the clamping force F_h; The air conditioning system module is connected to the control system module, the constant temperature module, and the digital tube module, and is used to control the temperature and humidity of the incubator. According to the input set value and the actual value feedback by the sensor, the control system takes heating or cooling operations to adjust the temperature and maintains the required humidity level through a humidity controller; The exhaust device module is connected to the control system module and is used to discharge the waste gas generated during the negative pressure constrained formation process. The exhaust volume is monitored in real time by a flow sensor.

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