Battery formation system

Abstract

The utility model provides a battery formation system. The battery formation system comprises a data acquisition module, a data processing module and a fire-fighting processing module, the data acquisition module comprises a plurality of RC oscillation circuits; wherein each RC oscillating circuit correspondingly detects one battery cell to be detected; the data acquisition module acquires the oscillation frequency of a to-be-tested cell in each work period based on the RC oscillation circuit and sends the oscillation frequency to the data processing module; the data processing module is used for converting the oscillation frequency into temperature data of the battery cell to be detected and sending a processing signal to the fire-fighting processing module according to the temperature data; and the fire-fighting processing module switches the working state of the fire-fighting equipment according to the received processing signal. According to the utility model, the accuracy of cell temperature measurement can be improved, and safe and stable operation of a battery formation system is ensured.

Description

Technical Field

[0001] The utility model relates to the field of batteries, in particular to a battery formation system. Background Art

[0002] The Battery Energy Storage System (BESS) is a system used for battery charge and discharge management and control after battery preparation. It can store electrical energy in the battery and release electrical energy to the grid or load when needed. Batteries generate heat during the charging and discharging process, and temperature changes can affect the performance and safety of the battery. When the battery temperature exceeds the safe range, the battery formation system needs to take measures for high temperature protection, such as stopping charging and discharging, reducing current, etc. Cell temperature measurement is an important monitoring method during the use of the battery formation system, which helps to ensure the safety and performance stability of the battery formation system.

[0003] Most of the existing technologies use thermistors to detect the temperature of the battery cell. The thermistor is placed close to the surface of the battery cell. Based on the theory that voltage is proportional to resistance under constant current conditions, the resistance is calculated by the current and voltage flowing through the thermistor, and the surface temperature of the battery cell is measured by the corresponding relationship between resistance and temperature. However, the above battery cell temperature measurement method is easily affected by factors such as the accuracy of the voltage stabilizer and the temperature drift of the operational amplifier, resulting in low accuracy of battery cell temperature measurement, which is not conducive to the stable operation of the battery formation system. Utility Model Content

[0004] The utility model aims to provide a battery core temperature measurement system to solve the above technical problems, improve the accuracy of battery core temperature measurement, and ensure the safe and stable operation of the battery formation system.

[0005] In order to solve the above technical problems, the utility model provides a battery cell temperature measurement system, including: a battery formation system, used to detect the battery cell to be tested, including: a data acquisition module, a data processing module and a fire processing module;

[0006] The data acquisition module includes a plurality of RC oscillation circuits; wherein each of the RC oscillation circuits detects a cell to be tested;

[0007] The oscillation period of the output level of the RC oscillation circuit changes with the temperature of the battery cell to be tested, and the data acquisition module sends the output level of the RC oscillation circuit to the data processing module;

[0008] The data processing module is used to record the change of the output level of the RC oscillation circuit in each working cycle and convert it into an oscillation frequency, convert the oscillation frequency into the temperature data of the battery cell to be tested, and send a processing signal to the fire processing module according to the temperature data;

[0009] The fire protection processing module switches the working state of the fire protection equipment according to the received processing signal.

[0010] In the above scheme, different from the prior art in which the current and voltage flowing through the thermistor are directly converted to obtain the surface temperature of the battery cell, the output level of the battery cell to be tested in each working cycle is collected through the RC oscillation circuit, and the output level is converted into an oscillation frequency, and the temperature data of the battery cell to be tested is generated by conversion operation based on the oscillation frequency. The RC oscillation circuit has the advantages of high precision and high response, and can quickly respond to the temperature changes of the battery cell to be tested. The oscillation frequency of the RC oscillation circuit can achieve accurate measurement of the battery cell temperature. In addition, the RC oscillation circuit has strong stability and anti-interference ability, and is less affected by environmental changes such as ambient temperature and power supply fluctuations. It can effectively resist the influence of external interference and improve the effectiveness and stability of temperature detection. Provide accurate and timely processing signals for the fire processing module to ensure that the battery formation system is in a safe and stable state.

[0011] In one implementation, the RC oscillator circuit includes a power supply, a thermistor, a voltage comparator and a first capacitor, specifically:

[0012] The non-inverting input terminal of the voltage comparator is connected to the power supply terminal;

[0013] The inverting input terminal of the voltage comparator is connected to the first end of the first capacitor and the first end of the thermistor; wherein the resistance value of the thermistor changes with the temperature of the battery cell to be tested;

[0014] The output terminal of the voltage comparator is connected to the second terminal of the thermistor.

[0015] In one embodiment, the thermistor is prepared as a temperature probe; wherein the temperature probe is tightly fitted to the top cover of the battery cell to be tested.

[0016] In one embodiment, the RC oscillator circuit further includes a first resistor, a second resistor, a third resistor and a fourth resistor, specifically:

[0017] The first end of the first resistor is connected to the first end of the second resistor and the first end of the third resistor;

[0018] The first end of the second resistor is also connected to the non-inverting input end of the voltage comparator;

[0019] The first end of the fourth resistor is also connected to the output end of the voltage comparator;

[0020] The second end of the third resistor is connected to the first end of the fourth resistor;

[0021] The second end of the first resistor is grounded;

[0022] The second end of the second resistor and the second end of the fourth resistor are connected to a power supply terminal.

[0023] In one embodiment, the first resistor, the second resistor, the third resistor and the fourth resistor have the same resistance value.

[0024] In one embodiment, the RC oscillation circuit further includes a fifth resistor, and a first end of the fifth resistor is connected to the output end of the voltage comparator.

[0025] In one embodiment, the data processing module includes an MCU and a PLC, specifically:

[0026] The input terminal of the MCU is connected to the output terminal of the voltage comparator;

[0027] The output terminal of the MCU is connected to the input terminal of the PLC;

[0028] The MCU is used to collect the oscillation frequency of the RC oscillation circuit in each working cycle and convert the oscillation frequency into temperature data of the battery cell to be tested according to a preset temperature conversion formula;

[0029] The PLC is used to perform safety judgment on the temperature data of each of the battery cells to be tested, and when the temperature data of a battery cell to be tested exceeds a preset safety threshold, a processing signal is sent to the fire protection processing module.

[0030] In one embodiment, the fire fighting equipment includes a smoke alarm, a water and gas fire fighting system, a battery cell carrier bracket, and a cylinder, specifically:

[0031] The smoke alarm is used for smoke monitoring in a battery formation system;

[0032] The water-gas fire fighting system is used to release fire extinguishing agent;

[0033] The battery cell carrier bracket is used to support the battery cell to be tested;

[0034] The cylinder is used to control the movement of the battery cell carrier bracket.

[0035] In one embodiment, the smoke alarm is connected to the water and gas fire fighting system and is used to send a smoke alarm signal to the water and gas fire fighting system.

[0036] In one embodiment, the MCU is provided with a temperature safety threshold. When the temperature data of the battery cell to be tested exceeds the temperature safety threshold and the smoke alarm is in a triggered state, the PLC controls the cylinder to move the battery cell carrier bracket to separate the battery cell to be tested from the charging, discharging and temperature probes. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of a module of a battery formation system provided in one embodiment of the utility model;

[0038] Figure 2 A schematic diagram of the connection relationship of an RC oscillator circuit provided in one embodiment of the utility model;

[0039] Figure 3 A schematic diagram of waveform changes of an RC oscillator circuit provided in one embodiment of the utility model;

[0040] Figure 4 The present invention is a schematic structural diagram of a battery formation system provided in one embodiment of the present invention.

[0041] Description of the accompanying drawings:

[0042] 101-data acquisition module, 102-data processing module, 103-fire processing module, R1-first resistor, R2-second resistor, R3-third resistor, R4-fourth resistor, R5-fifth resistor, R6-thermistor, Vcc-power supply end, 10-voltage comparator, 1-temperature probe, 4-MCU, 5-PLC, 50-battery cell carrier bracket, 60-cylinder, 70-smoke alarm, 80-water and gas fire fighting system. DETAILED DESCRIPTION

[0043] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0044] The terms "first" and "second" and the like in the specification, claims and drawings of this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0045] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0046] First, some terms in this application are explained to facilitate understanding by those skilled in the art.

[0047] (1) RC oscillator circuit: The RC oscillator circuit is an oscillator based on a capacitor and a resistor. The working principle of the RC oscillator circuit is based on the charging and discharging process between the capacitor and the resistor. When the capacitor is charged to a certain voltage, the discharge begins and the charge in the capacitor begins to flow to the resistor. As the charge in the capacitor decreases, the voltage also decreases accordingly. When the voltage drops to a certain level, the capacitor starts to charge again and the above process repeats.

[0048] (2) Voltage comparator: A voltage comparator is an electronic device that compares the magnitudes of two input voltages and outputs a corresponding electrical signal based on the comparison result.

[0049] (3) MCU: MCU (Microcontroller Unit) is a microcomputer system that integrates a central processing unit (CPU), memory (ROM, RAM), input / output ports (I / O Ports) and timers / counters. MCU is usually used to control various electronic devices and systems and is the core component of many embedded systems.

[0050] (4)PLC: PLC (Programmable Logic Controller) is a digital computer specially used in the field of industrial automation control, used to control various mechanical equipment or production lines in the production process. PLC usually consists of a central processing unit, input / output modules, communication modules and programming devices, etc. They execute the control program written by the user through a specific programming language or graphical programming software.

[0051] Example 1

[0052] See also Figure 1 , Figure 1 A schematic diagram of a module of a battery formation system provided in an embodiment of the present utility model, which is used to detect a battery cell to be tested, includes a data acquisition module 101, a data processing module 102 and a fire protection processing module 103;

[0053] The data acquisition module 101 includes a plurality of RC oscillation circuits; wherein each RC oscillation circuit detects a cell to be tested;

[0054] The oscillation period of the output level of the RC oscillation circuit changes with the temperature of the battery cell to be tested, and the data acquisition module 101 sends the output level of the RC oscillation circuit to the data processing module;

[0055] The data processing module 102 is used to record the change of the output level of the RC oscillation circuit in each working cycle and convert it into an oscillation frequency, convert the oscillation frequency into the temperature data of the battery cell to be tested, and send a processing signal to the fire processing module according to the temperature data;

[0056] The fire protection processing module 103 switches the working state of the fire protection equipment according to the received processing signal.

[0057] In one embodiment, the RC oscillator circuit includes a power supply, a thermistor R6, a voltage comparator 10 and a first capacitor C1, specifically: the non-inverting input terminal + of the voltage comparator 10 is connected to the power supply terminal Vcc; the inverting input terminal - of the voltage comparator 10 is connected to the first end of the first capacitor C1 and the first end of the thermistor R6; wherein the resistance value of the thermistor R6 changes with the temperature of the battery cell to be measured; and the output terminal of the voltage comparator 10 is connected to the second end of the thermistor R6.

[0058] In one embodiment, the thermistor R6 is prepared as a temperature probe 1, wherein the temperature probe 1 is tightly fitted to the top cover of the battery cell to be tested. The thermistor is prepared as a temperature probe and is tightly fitted to the top cover of the battery cell, which can effectively sense the temperature change of the battery cell, provide real-time temperature data, and realize fast and accurate monitoring of the battery cell temperature.

[0059] See also Figure 2 , Figure 2 The figure is a schematic diagram of the connection relationship of an RC oscillator circuit provided in an embodiment of the utility model. In the embodiment of the utility model, an RC oscillator circuit is formed based on a thermistor R6, a voltage comparator 10 and a first capacitor C1, and the voltage comparator is used to compare the magnitude of the input voltages of the two input terminals. When the voltage at the in-phase input terminal is higher than that at the inverting input terminal, the voltage comparator outputs a high level; when the voltage at the in-phase input terminal is lower than that at the inverting input terminal, the voltage comparator outputs a low level. The thermistor and the first capacitor form an RC network, RC is used to generate an oscillation signal, and the voltage comparator is used to generate a clear square wave signal. The output of the voltage comparator can be directly used as the output of the oscillation signal. Since the thermistor is prepared as a temperature probe and fits tightly to the top cover of the battery cell to be tested, the change in the resistance value of the thermistor is closely related to the change in the battery cell to be tested. Based on this, the resistance value of the analog quantity of the thermistor can be converted into an oscillation frequency signal of a digital quantity through an RC oscillation circuit. Preferably, in the embodiment of the utility model, the thermistor is a PT100 resistor and the first capacitor is a nominal capacitor.

[0060] In one embodiment, the RC oscillator circuit also includes a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4, specifically: the first end of the first resistor R1 is connected to the first end of the second resistor R2 and the first end of the third resistor R3; the first end of the second resistor R2 is also connected to the in-phase input end of the voltage comparator 10; the first end of the fourth resistor R4 is also connected to the output end of the voltage comparator 10; the second end of the third resistor R3 is connected to the first end of the fourth resistor R4; the second end of the first resistor R1 is grounded; the second end of the second resistor R2 and the second end of the fourth resistor R4 are connected to the power supply end Vcc.

[0061] By setting the second resistor and the fourth resistor between the in-phase input terminal and the output terminal of the voltage comparator and the power supply terminal, the voltage division ratio can be adjusted to ensure that the voltage comparator works normally and remains within its working range. At the same time, the impedance matching of the circuit can be adjusted to improve the stability of the circuit.

[0062] In one embodiment, the resistance values ​​of the first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4 are equal to facilitate the duty cycle calculation of the RC oscillator circuit. As another optimization scheme of the embodiment of the utility model, the output end of the voltage comparator 10 is also connected to the first end of the fifth resistor R5. The second end of the fifth resistor R5 is connected to the subsequent circuit. The fifth resistor R5 can be used to divide the voltage between the voltage comparator and the subsequent circuit to ensure that the subsequent circuit is within the normal working range.

[0063] After the power supply is powered on, the output level of the voltage comparator V1 = Vcc. According to the virtual disconnection principle, at this time, the level of the in-phase input terminal V3 = 2 / 3Vcc, and the level of the inverting input terminal V2 = 0. The level of the inverting input terminal gradually increases due to the thermistor charging the first capacitor. When the level V of the inverting input terminal is greater than the level V3 of the in-phase input terminal, the output level V1 becomes a low level. At this time, the in-phase input terminal V3 = 1 / 3Vcc. After the output level V1 becomes a low level, the level of the inverting input terminal gradually becomes less than the level V3 of the in-phase input terminal due to the discharge of the first capacitor through the thermistor. At this time, the output level V1 becomes V1 = Vcc again. This working process is repeated to form an oscillation output and a periodic square wave signal. See Figure 3 , Figure 3 The figure is a schematic diagram of waveform changes of an RC oscillation circuit provided in one embodiment of the utility model.

[0064] In one embodiment, the data acquisition module includes MCU4 and PLC5, specifically: the input end of MCU4 is connected to the output end of the voltage comparator 10; the output end of MCU4 is connected to the input end of PLC5; MCU5 is used to collect the oscillation frequency of the RC oscillation circuit in each working cycle and convert the oscillation frequency into the temperature data of the battery cell to be tested according to a preset temperature conversion formula; PLC5 is used to perform safety judgment on the temperature data of each battery cell to be tested, and when the temperature data of the battery cell to be tested exceeds the preset safety threshold, a processing signal is sent to the fire processing module 103.

[0065] In the embodiment of the utility model, the output end of the voltage comparator in each RC oscillation circuit is connected to the input end of the MCU, and the MCU collects the oscillation frequency of each RC oscillation circuit, and converts the oscillation frequency into the temperature data of each battery cell to be tested according to a preset temperature conversion formula. Then the output end of the MCU is connected to the PLC, and the PLC performs safety judgment on the received temperature data. When there is temperature data exceeding the preset safety threshold, the PLC promptly sends a processing signal to the fire processing module to ensure that the battery formation system is in a normal working state.

[0066] In the embodiment of the utility model, the process of MCU converting the oscillation frequency into temperature data according to the preset temperature conversion formula is as follows. It should be noted that, in order to facilitate calculation, the first resistor, the second resistor, the third resistor and the fourth resistor are set to the same resistance value.

[0067] The period of each RC oscillator circuit is calculated according to the RC oscillator circuit frequency calculation formula; wherein, the expression of the RC oscillator circuit frequency calculation formula is:

[0068] T=Th+Tl=(2ln 2)RC=RC*ln 4;

[0069] Wherein, T is the period, Th is the high level maintenance time, Tl is the low level maintenance time, R is the resistance value of the thermistor, and C is the resistance value of the first capacitor;

[0070] The frequency of each RC oscillation circuit is determined according to the period of each RC oscillation circuit, and the temperature data of each RC oscillation circuit is generated based on a preset temperature conversion formula; wherein the expression of the preset temperature conversion formula is:

[0071]

[0072] Where f is the frequency, T is actually the temperature data of the battery cell to be tested, K0 is the temperature coefficient of the thermistor, and R0 is the resistance value of the thermistor at 0 degrees Celsius.

[0073] Furthermore, the duty cycle of the RC oscillator circuit can also be calculated based on the charge and discharge operation of the RC oscillator circuit. The output of the RC oscillator circuit is a square wave signal with a period T equal to RC*ln4 and a duty cycle of 50%. According to the frequency calculation formula of the RC oscillator circuit, the period T=Th+Tl==(2ln2)RC=RC*ln4. According to the proportional relationship between the oscillation period and the resistance value, and the relationship between the resistance value and the temperature Ractual=Tactual*K0+R0, the oscillation frequency formula can be converted to obtain the temperature value of the battery cell to be tested. Since the period is inversely proportional to the frequency, Therefore, the oscillation frequency Then the actual temperature of the battery cell to be tested is obtained. Among them, K0 is the temperature coefficient of the thermistor, usually 0.00385 (unit: 1 / degree Celsius). R0 is the resistance value of the thermistor, that is, the PT100 resistor at 0 degrees Celsius, which is 100 ohms.

[0074] In one embodiment, the fire fighting equipment includes a smoke alarm 70, a water and gas fire fighting system 80, a battery cell carrier bracket 50 and a cylinder 60, specifically: the smoke alarm 70 is used for smoke monitoring in the battery formation system; the water and gas fire fighting system 80 is used for releasing fire extinguishing agent; the battery cell carrier bracket 50 is used for supporting the battery cell to be tested; and the cylinder 60 is used for controlling the movement of the battery cell carrier bracket.

[0075] In one embodiment, the smoke alarm is connected to the water and gas fire fighting system and is used to send a smoke alarm signal to the water and gas fire fighting system.

[0076] See also Figure 4 , Figure 4 It is a structural schematic diagram of a battery formation system provided in an embodiment of the utility model. In the embodiment of the utility model, several fire-fighting equipment are deployed in the fire-fighting processing module, including a smoke alarm 70, a water-gas fire-fighting system 80, a battery carrier bracket 50 and a cylinder 60. The smoke alarm 70 is used to monitor whether there is smoke, flame or other flammable gas in the battery manufacturing process. Once an abnormal situation is detected, an alarm will be sounded and corresponding safety measures will be triggered to avoid the occurrence of fire accidents. The water-gas fire-fighting system 80 is used to respond to fire incidents. Once the smoke alarm sounds an alarm, the water-gas fire-fighting system will start and release a fire extinguishing agent (such as water mist, foam, etc.) to extinguish the fire, so as to quickly extinguish the fire and ensure the safety of the production line and the working environment. The battery carrier bracket is a structure used to support and protect the battery, which can ensure the correct position and fixation of the battery during the assembly process, and ensure the quality and performance of the battery assembly. The cylinder is used to control various actions on the assembly line in the battery formation system. The movement of the cylinder can realize the movement of the battery carrier, the assembly and fixation of the battery, etc.

[0077] In one embodiment, the MCU is provided with a temperature safety threshold. When the temperature data of the battery cell to be tested exceeds the temperature safety threshold and the smoke alarm is in a triggered state, the PLC controls the cylinder to move the battery cell carrier bracket to separate the battery cell to be tested from the charging, discharging and temperature probes.

[0078] When it is detected that the temperature data of the battery cell to be tested exceeds the preset safety threshold and the smoke alarm is in the triggered state, the PLC5 sends a processing signal to the fire processing module 103, so that each fire-fighting equipment in the fire processing module can switch the working state according to the received processing signal, perform safety maintenance, and ensure that the battery formation system is in a safe and stable working environment. At this time, the cylinder 60 moves according to the received processing signal to control the movement of the battery cell carrier bracket 50 supporting the battery cell to be tested, so that the battery cell to be tested is separated from the charging and discharging and temperature probes, and the charging and discharging work is stopped. Furthermore, the water and gas fire fighting system 80 releases fire extinguishing agent to the battery cell to be tested to extinguish the fire, avoiding safety hazards and equipment damage caused by the spread of fire.

[0079] The embodiment of the utility model provides a battery formation system, which is different from the prior art that directly converts the current and voltage flowing through the thermistor to obtain the surface temperature of the battery cell. The output level of the battery cell to be tested in each working cycle is collected through an RC oscillation circuit, and the output level is converted into an oscillation frequency. The temperature data of the battery cell to be tested is generated by conversion calculation based on the oscillation frequency. The RC oscillation circuit has the advantages of high precision and high response, and can quickly respond to the temperature change of the battery cell to be tested. The oscillation frequency of the RC oscillation circuit can achieve accurate measurement of the battery cell temperature. In addition, the RC oscillation circuit has strong stability and anti-interference ability, and is less affected by environmental changes such as ambient temperature and power supply fluctuations. It can effectively resist the influence of external interference and improve the effectiveness and stability of temperature detection. Provide accurate and timely processing signals for the fire processing module to ensure that the battery formation system is in a safe and stable state.

[0080] The above are only preferred implementations of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A battery formation system for detecting a battery cell to be tested, characterized in that: include: Data acquisition module, data processing module and fire processing module; The data acquisition module includes a plurality of RC oscillation circuits; wherein each of the RC oscillation circuits detects a cell to be tested; The oscillation period of the output level of the RC oscillation circuit changes with the temperature of the battery cell to be tested, and the data acquisition module sends the output level of the RC oscillation circuit to the data processing module; The data processing module is used to record the change of the output level of the RC oscillation circuit in each working cycle and convert it into an oscillation frequency, convert the oscillation frequency into the temperature data of the battery cell to be tested, and send a processing signal to the fire processing module according to the temperature data; The fire protection processing module switches the working state of the fire protection equipment according to the received processing signal.

2. A battery formation system as claimed in claim 1, characterized in that: The RC oscillator circuit includes a power supply, a thermistor, a voltage comparator and a first capacitor, specifically: The non-inverting input terminal of the voltage comparator is connected to the power supply terminal; The inverting input terminal of the voltage comparator is connected to the first end of the first capacitor and the first end of the thermistor; wherein the resistance value of the thermistor changes with the temperature of the battery cell to be measured; The output terminal of the voltage comparator is connected to the second terminal of the thermistor.

3. A battery formation system as claimed in claim 2, characterized in that: The thermistor is prepared as a temperature probe; wherein the temperature probe is attached to the battery cell to be tested.

4. A battery formation system as claimed in claim 2, characterized in that: The RC oscillator circuit further includes a first resistor, a second resistor, a third resistor and a fourth resistor, specifically: The first end of the first resistor is connected to the first end of the second resistor and the first end of the third resistor; The first end of the second resistor is also connected to the non-inverting input end of the voltage comparator; The first end of the fourth resistor is also connected to the output end of the voltage comparator; The second end of the third resistor is connected to the first end of the fourth resistor; The second end of the first resistor is grounded; The second end of the second resistor and the second end of the fourth resistor are connected to a power supply terminal.

5. A battery formation system as claimed in claim 4, characterized in that: The first resistor, the second resistor, the third resistor and the fourth resistor have the same resistance value.

6. A battery formation system as claimed in claim 5, characterized in that: The RC oscillation circuit further includes a fifth resistor, a first end of the fifth resistor is connected to the output end of the voltage comparator.

7. A battery formation system as claimed in claim 2, characterized in that: The data processing module includes MCU and PLC, specifically: The input end of the MCU is connected to the output end of the voltage comparator; The output terminal of the MCU is connected to the input terminal of the PLC; The MCU is used to collect the oscillation frequency of the RC oscillation circuit in each working cycle and convert the oscillation frequency into temperature data of the battery cell to be tested according to a preset temperature conversion formula; The PLC is used to perform safety judgment on the temperature data of each of the battery cells to be tested, and when the temperature data of a battery cell to be tested exceeds a preset safety threshold, a processing signal is sent to the fire protection processing module.

8. A battery formation system as claimed in claim 7, characterized in that: The fire fighting equipment includes a smoke alarm, a water and gas fire fighting system, a battery carrier bracket, and a cylinder, specifically: The smoke alarm is used for smoke monitoring in a battery formation system; The water-gas fire fighting system is used to release fire extinguishing agent; The battery cell carrier bracket is used to support the battery cell to be tested; The cylinder is used to control the movement of the battery cell carrier bracket.

9. A battery formation system as claimed in claim 8, characterized in that: The smoke alarm is connected to the water-gas fire fighting system and is used to send a smoke alarm signal to the water-gas fire fighting system.

10. A battery formation system as claimed in claim 8, characterized in that: The MCU is provided with a temperature safety threshold. When the temperature data of the battery cell to be tested exceeds the temperature safety threshold and the smoke alarm is in a triggered state, the PLC controls the cylinder to move the battery cell carrier bracket to separate the battery cell to be tested from the charge, discharge and temperature probes.

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