New energy lithium battery test integrated management system

Abstract

The invention belongs to the technical field of lithium battery testing, and particularly relates to a new energy lithium battery testing comprehensive management system, which comprises a data acquisition module, a data processing module and a data processing module, the cooling module is used for cooling the high temperature in the discharging process of the lithium battery, and the specific cooling mode is as follows: the temperature in the discharging process of the lithium battery is controlled by increasing the flow rate of a cooling medium, and the discharging performance of the battery can be influenced by increasing the electrolyte viscosity of the battery and reducing the electrochemical reaction rate in a low-temperature environment; the low-temperature preheating system increases the temperature of the battery pack by heating a cooling medium, so that the performance of the battery under a cold condition is improved; by controlling the cooling medium in the discharging process of the lithium battery, the temperature in the whole discharging process is constant, and the flow velocity and flow of the cooling medium can be accurately controlled.

Description

Technical Field

[0001] The invention belongs to the technical field of lithium battery testing, in particular to a new energy lithium battery testing integrated management system. Background Art

[0002] Lithium batteries can be divided into two categories: lithium metal batteries and lithium ion batteries. Lithium ion batteries do not contain metallic lithium and are rechargeable. They have the advantages of high safety, small size, light weight and environmental protection. They are gradually becoming the first choice in the field of new energy. After the production of new energy lithium batteries, in order to evaluate the performance of lithium batteries, the finished new energy lithium batteries need to be discharged.

[0003] Lithium batteries require a discharge device when performing discharge tests. In order to obtain accurate and reliable test data, it is necessary to conduct the test under controlled environmental conditions, such as temperature, to avoid temperature changes affecting the internal resistance and chemical reaction rate of the battery and affecting the test results.

[0004] During the discharge process, the lithium battery is generally charged at a preset current at a constant current until the lithium battery voltage reaches the charging cut-off voltage, then the charging is stopped and the lithium battery is left to stand for a period of time, and then discharged at a set current at a constant current until the lithium battery voltage drops to the discharge cut-off voltage. During discharge, the rate and duration of energy release by the lithium battery are recorded. During the discharge process, a large amount of heat is generated, and a cooling medium is needed to take away the heat while ensuring that the test working environment temperature is constant. However, if the lithium battery has an abnormal condition during the discharge process, it is currently difficult to change the flow rate of the cooling medium according to the abnormal condition to maintain the normal temperature of the lithium battery.

[0005] To this end, the present invention provides a new energy lithium battery test integrated management system. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is: a new energy lithium battery test integrated management system described in the present invention comprises: Data acquisition module: The data acquisition module is used to collect the temperature of the lithium battery during the discharge process of the lithium battery; Cooling module: The cooling module is used to control the flow rate of the cooling medium; Heating module: The heating module is used to control the temperature rise of the lithium battery; Data analysis module: The data analysis module is used to analyze whether the temperature of the lithium battery is normal during the discharge process of the lithium battery, specifically: Obtain continuous temperature values ​​of lithium batteries during discharge and create a data set ; Based on the pre-set maximum threshold of lithium battery temperature during lithium battery discharge and the minimum threshold of lithium battery temperature ; like , the cooling module controls the flow rate of the cooling medium to be constant; like , the cooling module controls the cooling medium flow rate to increase; like , the heating module controls the lithium battery temperature to rise;

[0008] Preferably, the data acquisition module is also used to collect the external environment temperature, and the data analysis module also includes: Based on the preset minimum threshold of external ambient temperature and the highest threshold ; During the discharge process, if the ambient temperature is lower than When the temperature of the lithium battery is increased by controlling the heating module; If the external environment temperature is greater than , by controlling the cooling module to increase the flow rate of the cooling medium and reduce the temperature of the lithium battery;

[0009] Preferably, the specific method for the cooling module to determine the flow rate of the cooling medium is: Calculated according to the formula: in is the cooling medium flow rate; is the cooling medium flow rate; is the cross-sectional area of ​​the cooling medium flow pipe;

[0010] Preferably, the cooling medium flow rate The specific determination method is: in is the cooling medium flow rate; is the cooling capacity of the cooling medium; is the density of the cooling medium; is the specific heat capacity of the cooling medium; is the continuous adjacent temperature difference of the lithium battery;

[0011] Preferably, the data acquisition module is also used to monitor the density of the cooling medium. : The data analysis module also includes: like , the cooling module controls the cooling medium flow rate to increase; like , the cooling module controls the cooling medium flow rate to decrease; Among them, the is the preset maximum threshold value of cooling medium density;

[0012] Preferably, the data analysis module further comprises an alarm unit, and the alarm unit is used to give an alarm when the cooling medium density is abnormal; If the cooling medium density or When the alarm unit sounds an alarm.

[0013] Preferably, the data analysis module is also used to monitor whether consecutive adjacent temperature values ​​of the lithium battery during the discharge process are abnormal, specifically: If you want to obtain the continuous temperature value of the lithium battery during the discharge process and , the cooling module controls the cooling medium flow rate to increase and disconnects the lithium battery for discharge; Said For time The lithium battery temperature value at ; Said For time The lithium battery temperature value after.

[0014] Preferably, the data analysis module is also used to monitor whether the continuous temperature difference of the lithium battery during the discharge process is abnormal, specifically: Calculated according to the formula: Among them: Calculate and obtain the continuous temperature difference of the lithium battery during the discharge test ; is the number of temperature values ​​collected during the discharge process; It is the average value of the total number of temperature values ​​collected during the discharge process of the lithium battery; is the temperature value of the lithium battery at any time; Pre-set the highest threshold value of abnormal continuous temperature difference during lithium battery discharge test ; If K F, the cooling module controls the cooling medium flow rate to increase; If K F, the cooling module controls the cooling medium flow rate to increase and disconnects the lithium battery from discharging.

[0015] Preferably, the data acquisition module is also used to detect whether the resistance of the lithium battery is normal during discharge, specifically: Obtaining the resistance of a lithium battery during discharge ; like , then disconnect the lithium battery to discharge; Said It is the preset maximum threshold of lithium battery resistance.

[0016] Preferably, the data analysis module further includes an electrochemical sensor, which is used to detect whether the electrolyte of the lithium battery leaks during the discharge process; Obtain the conductivity value of the lithium battery during discharge ; like , then disconnect the lithium battery to discharge; Said To pre-set the maximum threshold value of the conductivity value of the lithium battery during the discharge process.

[0017] The beneficial effects of the present invention are as follows: 1. The present invention discloses a new energy lithium battery test integrated management system. During the lithium battery discharge process, the cooling medium circulates inside the circulating cooling pump for a long time. Partial scale will be generated on the inner wall of the circulating cooling pump. The scale is doped into the cooling medium, which increases the concentration of calcium ions and magnesium ions in the cooling medium. When the pressure of the circulating cooling pump is normal, the flow rate of the cooling medium will decrease. The cooling module controls to increase the pressure of the circulating cooling pump to increase the flow rate of the cooling medium, ensuring that the temperature of the lithium battery is normal during the entire discharge process. At this time, the discharge test of the lithium battery runs normally. After a discharge test is completed, the tester turns on the circulating cooling pump to clean the scale of the cooling medium, so that the density of the cooling medium returns to normal density, thereby ensuring that the subsequent detection process can achieve the normal flow rate of the cooling medium under the normal pressure of the circulating cooling pump. This facilitates the temperature control of the lithium battery during the discharge process, improves the reliability of the lithium battery during the discharge process, and has an energy-saving effect.

[0018] 2. In the new energy lithium battery test integrated management system described in the present invention, the temperature of the lithium battery is difficult to lower. At this time, the surface discharge temperature of the lithium battery is abnormal, that is, the lithium battery discharge is disconnected and the cooling medium flow rate is continuously increased until the lithium battery temperature is normal. This improves the safety of the entire discharge process and avoids the failure of high-temperature discharge control, which triggers a violent chemical reaction inside the lithium battery and generates a large amount of heat, leading to lithium battery leakage, gas release, smoking, and even combustion and explosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 It is a system flow chart of the present invention. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0022] During the discharge process of the lithium battery test, the lithium battery is generally charged at a preset current at a constant current until the lithium battery voltage reaches the charging cut-off voltage, then the charging is stopped and the lithium battery is left to stand for a period of time, and then the constant current discharge is performed at a set current until the lithium battery voltage drops to the discharge cut-off voltage. During the discharge, the rate and duration of energy release of the lithium battery will be recorded. During the discharge process, a large amount of heat will be generated, and a cooling medium is required to take away the heat while ensuring that the test working environment temperature is constant. However, if the lithium battery has an abnormal situation during the discharge process, it is currently difficult to change the flow rate of the cooling medium according to the abnormal situation to maintain the normal temperature of the lithium battery.

[0023] like Figure 1 As shown, a new energy lithium battery test integrated management system according to an embodiment of the present invention includes a data acquisition module, a cooling module, a heating module, and a data analysis module; The data acquisition module is used to collect the temperature of the lithium battery during the discharge process of the lithium battery; The data analysis module is used to analyze whether the temperature of the lithium battery is normal during the discharge process of the lithium battery, specifically: Obtain continuous temperature values ​​of lithium batteries during discharge and create a data set The temperature collection method of lithium battery is as follows: temperature sensors are installed at key positions of lithium battery pack, such as the surface of lithium battery cell and the center of battery pack, so as to obtain accurate measurement of the surface temperature of lithium battery during discharge; Specifically, the continuous temperature value of the lithium battery during the discharge process is to collect the temperature value of the lithium battery during the discharge process according to a fixed period, such as collecting the temperature value once every 5 minutes, where is the initial temperature of the lithium battery, is the lithium battery temperature value at 5 minutes, This is the lithium battery temperature value at 10 minutes, and so on.

[0024] Based on the pre-set maximum threshold of lithium battery temperature during lithium battery discharge and the minimum threshold of lithium battery temperature , where the maximum threshold of lithium battery temperature is and the minimum threshold of lithium battery temperature The determination is made by the tester based on the historical test data of the lithium battery. In the embodiment of the present invention, the maximum threshold value of the lithium battery temperature Can be , the minimum temperature threshold of lithium battery Can be ; like , the cooling module controls the flow rate of the cooling medium to be constant; like , the cooling module controls the cooling medium flow rate to increase; like , the heating module increases the temperature of the lithium battery by controlling the temperature of the electric heating plate to ensure the normal discharge of the lithium battery; The cooling module is used to cool the high temperature of the lithium battery during the discharge process. The specific cooling method is: an electric circulating cooling pump is set on the outer surface of the lithium battery test, so that the cooling medium flows in the electric circulating cooling pump. The heat conduction of the cooling medium in the electric circulating cooling pump takes away the heat from the surface of the lithium battery, and the temperature of the lithium battery during the discharge process is controlled; The heating module is used to increase the temperature of the lithium battery during the discharge process. The specific heating method is: an external electric heating plate is installed on the surface of the lithium battery, and the temperature of the lithium battery itself is heated by heating the electric heating plate; Since the viscosity of the battery electrolyte increases and the electrochemical reaction rate decreases under low temperature conditions, this will affect the discharge performance of the battery. By heating the lithium battery temperature, the performance of the battery under cold conditions can be improved. The embodiment of the present invention periodically and continuously monitors the temperature of the lithium battery during the discharge process through a data acquisition module, and determines whether the temperature of the lithium battery during the discharge process is abnormal based on a preset temperature. If the temperature of the lithium battery is higher than the maximum threshold , the cooling medium flow rate is increased to cool the lithium battery in time. If the temperature of the lithium battery is lower than the minimum threshold , the lithium battery is heated by the heating module, so that the temperature abnormality can be detected in time during the discharge process of the lithium battery, and corresponding responses can be made to maintain the relative constant temperature of the lithium battery.

[0025] The data acquisition module is also used to collect the external environment temperature, and the data analysis module also includes: Based on the preset minimum threshold of external ambient temperature and the highest threshold , where the minimum threshold of the external environment temperature is and the highest threshold It is set by the tester based on the historical test data of lithium batteries; During the discharge process, if the ambient temperature is lower than When the temperature of the lithium battery is increased by controlling the heating module; If the external environment temperature is greater than , by controlling the cooling module to increase the flow rate of the cooling medium and reduce the temperature of the lithium battery; Adjust the working mode of the heating module or cooling module based on the external environment temperature and the temperature judgment during the lithium battery discharge process; If the external environment temperature is and The discharge current of the lithium battery will not change; The temperature of the lithium battery will be affected to a certain extent by the ambient temperature. In a low temperature environment, the electrochemical reaction rate of the lithium battery slows down and the viscosity of the electrolyte increases; in a high temperature environment, the lithium battery electrolyte may experience thermal runaway, battery leakage, gas emission and smoke problems; Therefore, during the discharge process of lithium batteries, it is also necessary to maintain a relatively constant ambient temperature. By monitoring the ambient temperature, when the ambient temperature is found to be abnormal, in order to avoid the ambient temperature affecting the temperature of the lithium battery, it is necessary to control the temperature of the lithium battery in time; When the ambient temperature is lower than the minimum threshold of the external ambient temperature , timely maintain the normal temperature of the lithium battery during the discharge test through the heating module in the embodiment of the present invention; when the ambient temperature is higher than the maximum threshold The temperature of the lithium battery during the discharge process is promptly maintained by the cooling module in the embodiment of the present invention, thereby monitoring the thermal management of the entire lithium battery in real time, thereby improving the safety of the lithium battery during the discharge process.

[0026] The specific method for determining the flow rate of the cooling medium by the cooling module is: Calculated according to the formula: in is the cooling medium flow rate; is the cooling capacity of the cooling medium; is the density of the cooling medium; is the specific heat capacity of the cooling medium; is the continuous adjacent temperature difference of the lithium battery; Cooling medium flow After confirmation, through the formula: in is the cooling medium flow rate; is the cooling medium flow rate; is the cross-sectional area of ​​the cooling medium flow pipe; It can be clearly seen that when the temperature of the lithium battery is abnormal, such as when the temperature is too high, the lithium battery needs to be cooled down in time to maintain the temperature of the lithium battery. At this time, the flow rate of the cooling medium needs to be reasonably controlled to achieve rapid cooling while avoiding the negative impact of excessive cooling on the lithium battery. Therefore, it is necessary to reasonably plan the flow rate of the cooling medium based on the temperature of the lithium battery. After calculation, it is transmitted to the cooling module. Through the circulation of the cooling medium in the circulating cooling pump, the heat generated by the lithium battery during the discharge process is transferred to the external radiator, and then the heat is discharged by the fan to maintain the temperature of the lithium battery during the discharge process.

[0027] The data acquisition module is also used to monitor the density of the cooling medium. : The data analysis module also includes: like , the cooling module controls the cooling medium flow rate to increase, so that the surface temperature of the lithium battery is cooled to normal temperature and the entire discharge process is completed; like , the cooling module controls the cooling medium flow rate to decrease, so as to avoid the problem of excessive heat dissipation of the lithium battery caused by excessive cooling medium flow rate; Among them, the is the preset maximum threshold value of cooling medium density, where the maximum threshold value of cooling medium density is It is set by the tester according to the heat dissipation capacity of the cooling medium; Due to the density of the cooling medium It will directly affect the specific heat capacity of the cooling medium, and then directly affect the heat exchange between the cooling medium and the lithium battery. If the density of the cooling medium cannot be discovered in time If abnormal, the data analysis module will To determine the flow rate of the cooling medium, at this time due to the cooling medium density Therefore, the equivalent temperature control effect cannot be achieved at the same flow rate. Therefore, it is necessary to adjust the flow rate of the cooling medium in time to meet the requirement of rapid cooling while avoiding excessive cooling.

[0028] In the above embodiment, by detecting the density of the cooling medium , determine the density of the cooling medium Whether it is normal, and then reasonably plan the flow rate of the cooling medium to achieve safer and more efficient temperature control of the lithium battery.

[0029] By precisely controlling the coolant during the discharge process of lithium batteries, we can not only prevent the battery from overheating, reduce the risk of thermal runaway, and protect the safety of the battery, but also make the entire test environment a safe environment, thereby improving the reliability of the lithium battery test system.

[0030] The data analysis module further includes an alarm unit, which is used to alarm when the cooling medium density is abnormal; If the cooling medium density or When the alarm unit sounds an alarm; Specifically, due to the cooling medium density It is determined by the concentration of calcium ions and magnesium ions in the cooling medium. During the discharge process of the lithium battery, the cooling medium circulates inside the circulating cooling pump for a long time. Some scale will be generated on the inner wall of the circulating cooling pump. The scale is mixed into the cooling medium, which increases the concentration of calcium ions and magnesium ions in the cooling medium. At this time, the data analysis module will still analyze the data according to the normal density. To control the flow rate of the cooling medium, but at this time, the cooling medium with more scale is difficult to dissipate heat for the lithium battery at a normal flow rate. When the temperature of the lithium battery is kept constant during the discharge process, the cooling module controls the cooling medium flow rate to increase, thereby ensuring that the temperature of the lithium battery is normal. At this time, the discharge test of the lithium battery is running normally. After a discharge test is completed, the abnormal cooling medium needs to be processed. At this time, the tester turns on the circulating cooling pump to clean the scale of the cooling medium and restore the cooling medium density to normal density, so as to ensure that the subsequent data analysis module is based on the normal density. To control the flow rate of the cooling medium, it is convenient to control the temperature of the lithium battery during the discharge process, improve the reliability of the lithium battery during the discharge process, and at the same time have an energy-saving effect.

[0031] The data analysis module is also used to monitor whether the consecutive adjacent temperature values ​​of the lithium battery during the discharge process are abnormal, specifically: If you want to obtain the continuous temperature value of the lithium battery during the discharge process and , the cooling module controls the cooling medium flow rate to increase and disconnects the lithium battery for discharge; Said For time The lithium battery temperature value at ; Said For time The temperature value of the lithium battery after It can be clearly seen that when the temperature of the lithium battery is detected to be too high, the temperature of the lithium battery can be slowly maintained at normal by increasing the flow rate of the cooling medium. However, if the lithium battery has other abnormalities during the test, such as a short circuit, it is difficult to reduce the temperature of the lithium battery by increasing the flow rate of the cooling medium. Therefore, the lithium battery in this state needs to be further controlled. Specifically, during the lithium battery discharge detection process, if a certain time is detected The temperature is greater than the maximum threshold of the lithium battery temperature , and when the cooling medium flow rate increases, the next time Still greater than the maximum threshold of lithium battery temperature , that is, the temperature of the lithium battery is difficult to be lowered, which indicates that the discharge temperature of the lithium battery is abnormal. At this time, the lithium battery discharge is disconnected and the cooling medium flow rate is continuously increased until the lithium battery temperature is normal. This improves the safety of the entire discharge process and avoids the failure of high-temperature discharge control, which triggers violent chemical reactions inside the lithium battery and generates a lot of heat, causing lithium battery leakage, gas release, smoking, and even combustion and explosion.

[0032] The data analysis module is also used to monitor whether the continuous temperature difference of the lithium battery during the discharge process is abnormal, specifically: Calculated according to the formula: Among them: Calculate and obtain the continuous temperature difference of the lithium battery during the discharge test ; is the number of temperature values ​​collected during the discharge process; It is the average value of the total number of temperature values ​​collected during the discharge process of the lithium battery; is the temperature value of the lithium battery at any time; It should be noted that the temperature change value of the lithium battery during the discharge process increases slowly, that is, the temperature change of the lithium battery during the discharge process collected continuously at a fixed period increases according to a certain regular value. However, when the lithium battery is in the discharge process, if the lithium battery body is abnormal, such as a short circuit, the temperature difference between the two collected will change greatly; Pre-set the highest threshold value of abnormal continuous temperature difference during lithium battery discharge test , the highest threshold of continuous temperature difference anomaly It is set by the tester based on the normal temperature change during the lithium battery discharge test; If K F, the cooling module controls the cooling medium flow rate to increase to reduce the temperature of the lithium battery during discharge; If K F, the cooling module controls the cooling medium flow rate to increase to reduce the temperature of the lithium battery during discharge and disconnects the lithium battery from discharge; If the temperature difference is too large during the discharge detection process, it means that the temperature of the lithium battery is abnormal during the discharge process, and measures should be taken in advance to solve the abnormal situation of the lithium battery to avoid the failure of high-temperature discharge control, which will trigger a violent chemical reaction inside the lithium battery and generate a lot of heat.

[0033] The data acquisition module is also used to detect whether the resistance of the lithium battery is normal during discharge, specifically: Obtaining the resistance of a lithium battery during discharge ; like Then disconnect the lithium battery to discharge; Said The preset maximum resistance threshold of lithium battery, which is set by the tester according to the performance of the lithium battery itself; During the discharge process of lithium batteries, if the resistance of the lithium battery is too large, it may cause the battery to overheat, increasing the risk of thermal runaway; Therefore, by real-time detection of the resistance R of the lithium battery during discharge, the safety of the lithium battery during discharge is ensured. When the discharge current increases, the internal resistance of the lithium battery decreases during discharge, and the cooling medium flow rate is increased by controlling the cooling module to reduce the temperature of the lithium battery during discharge.

[0034] The data analysis module also includes an electrochemical sensor, which is used to detect whether the electrolyte of the lithium battery leaks during the discharge process; Obtain the conductivity value of the lithium battery during discharge ; like , then disconnect the lithium battery to discharge; Said To pre-set the highest threshold value of the conductivity value of the lithium battery during the discharge process. The highest threshold value of the conductivity value is set by the tester based on the historical data of the lithium battery during the discharge process; During the discharge process of lithium batteries, if the surface temperature of the lithium battery is abnormal, that is, when the temperature is high, the lithium battery shell may be damaged, and part of the electrolyte may leak to the surface of the lithium battery. When the electrolyte leaks, it will change the pH value and conductivity of the surrounding area. Therefore, the electrochemical sensor can detect whether the conductivity changes. Therefore, by real-time detection of the electrolyte during the discharge process of the lithium battery, abnormal discharge of the lithium battery due to other emergencies can be avoided.

[0035] When working, the viscosity of the electrolyte of the lithium battery increases and the electrochemical reaction rate decreases under low temperature conditions, which will affect the discharge performance of the battery. By heating the cooling medium, the temperature of the lithium battery is increased, thereby improving the performance of the lithium battery under cold conditions. During the discharge process of the lithium battery, some scale will be generated inside the circulating cooling pump for a long time. The scale will increase the concentration of calcium ions and magnesium ions. After one discharge is completed, the scale is processed to ensure the normal flow rate of the cooling medium in the subsequent detection process, which is convenient for temperature control of the lithium battery during the discharge process and improves the reliability of the lithium battery during the discharge process. When the temperature of the lithium battery is difficult to lower, the surface lithium battery discharge temperature is abnormal, that is, the lithium battery discharge is disconnected and the cooling medium flow rate is continuously increased until the lithium battery temperature is normal, thereby improving the safety of the entire discharge process and avoiding the failure of high-temperature discharge control, which triggers a violent chemical reaction inside the lithium battery, generates a lot of heat, and causes the lithium battery to leak, deflate, smoke, and even burn and explode.

[0036] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A new energy lithium battery test integrated management system, characterized by: include Data acquisition module: The data acquisition module is used to collect the temperature of the lithium battery during the discharge process of the lithium battery; Cooling module: The cooling module is used to control the flow rate of the cooling medium; Heating module: The heating module is used to control the temperature rise of the lithium battery; Data analysis module: The data analysis module is used to analyze whether the temperature of the lithium battery is normal during the discharge process of the lithium battery, specifically: Obtain continuous temperature values ​​of lithium batteries during discharge and create a data set ; Based on the pre-set maximum threshold of lithium battery temperature during lithium battery discharge and the minimum threshold of lithium battery temperature ; like , the cooling module controls the flow rate of the cooling medium to be constant; like , the cooling module controls the cooling medium flow rate to increase; like , the heating module controls the lithium battery temperature to rise; The data acquisition module is also used to collect the external environment temperature, and the data analysis module also includes: Based on the preset minimum threshold of external ambient temperature and the highest threshold ; During the discharge process, if the ambient temperature is lower than When the temperature of the lithium battery is increased by controlling the heating module; If the external environment temperature is greater than , by controlling the cooling module to increase the flow rate of the cooling medium and reduce the temperature of the lithium battery; The specific method for determining the flow rate of the cooling medium by the cooling module is: Calculated according to the formula: in is the cooling medium flow rate; is the cooling medium flow rate; is the cross-sectional area of ​​the cooling medium flow pipe; The cooling medium flow rate The specific determination method is: in is the cooling medium flow rate; is the cooling capacity of the cooling medium; is the density of the cooling medium; is the specific heat capacity of the cooling medium; is the continuous adjacent temperature difference of the lithium battery; The data acquisition module is also used to monitor the density of the cooling medium. : The data analysis module also includes: like , the cooling module controls the cooling medium flow rate to increase; like , the cooling module controls the cooling medium flow rate to decrease; Among them, the is the preset maximum threshold value of cooling medium density; The data analysis module further includes an alarm unit, which is used to alarm when the cooling medium density is abnormal; If the cooling medium density or When the alarm unit sounds an alarm.

2. The new energy lithium battery test integrated management system according to claim 1 is characterized by: The data analysis module is also used to monitor whether the consecutive adjacent temperature values ​​of the lithium battery during the discharge process are abnormal, specifically: If you want to obtain the continuous temperature value of the lithium battery during the discharge process and , the cooling module controls the cooling medium flow rate to increase and disconnects the lithium battery for discharge; Said For time The lithium battery temperature value at ; Said For time The lithium battery temperature value after.

3. The new energy lithium battery test integrated management system according to claim 1 is characterized by: The data analysis module is also used to monitor whether the continuous temperature difference of the lithium battery during the discharge process is abnormal, specifically: Calculated according to the formula: Among them: Calculate and obtain the continuous temperature difference of the lithium battery during the discharge test ; is the number of temperature values ​​collected during the discharge process; It is the average value of the total number of temperature values ​​collected during the discharge process of the lithium battery; is the temperature value of the lithium battery at any time; Pre-set the highest threshold of abnormal continuous temperature difference during lithium battery discharge test ; If K F, the cooling module controls the cooling medium flow rate to increase; like , the cooling module controls the cooling medium flow rate to increase and disconnects the lithium battery from discharging.

4. The new energy lithium battery test integrated management system according to claim 3 is characterized by: The data acquisition module is also used to monitor whether the resistance of the lithium battery is normal during discharge, specifically: Obtaining the resistance of a lithium battery during discharge ; like , then disconnect the lithium battery to discharge; , which is the preset maximum threshold value of lithium battery resistance.

5. The new energy lithium battery test integrated management system according to claim 4 is characterized by: The data analysis module also includes an electrochemical sensor, which is used to detect whether the electrolyte of the lithium battery leaks during the discharge process; The conductivity value of the lithium battery during discharge is obtained ; like , then disconnect the lithium battery to discharge; Among them, the To pre-set the maximum threshold value of the conductivity value of the lithium battery during the discharge process.

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