A battery swap cabinet control system and method thereof

Abstract

The present invention belongs to the technical field of vehicle power supply auxiliary equipment, specifically a battery swap cabinet control system and method thereof, including a battery swap cabinet, wherein a plurality of charging grids for charging batteries are arranged in the battery swap cabinet, the charging grid is equipped with a scanning unit for identifying the battery model and battery code, the charging grid is equipped with a charging module, a temperature control module, a battery capacity detection module, and an internal resistance detection module; the battery is equipped with a SOC module and a SOH module. The present invention uses a control system to scan the battery code of the battery being charged through a scanning unit, and uploads the battery status to the cloud, and then the cloud can read the battery status of the battery code, and can recover and repair abnormal batteries, or replace abnormal batteries in the battery swap cabinet in advance to avoid replacing abnormal batteries on other vehicles, which is conducive to ensuring the quality of batteries replaced by the battery swap cabinet.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle power supply auxiliary equipment, and in particular to a battery swap cabinet control system and method thereof. Background Art

[0002] With the rapid development of new energy vehicles in my country, the fast charging and battery replacement methods for new energy vehicles are fast charging and battery replacement, and battery replacement cabinets are used for centralized management and replacement of battery equipment.

[0003] Specifically, there are two problems with battery swap cabinets in the prior art:

[0004] 1. For batteries with different remaining charges and different health conditions, using the charging gear method cannot protect batteries that have entered the attenuation period.

[0005] 2. During the battery replacement process of the battery exchange cabinet, it is inevitable that the battery will be bumped. At the same time, the battery will also age during its long-term operation. Once an abnormality occurs during the charging process, it is very easy to cause a fire. The battery status cannot be evaluated during the charging process.

[0006] The existing battery swap cabinets on the market are unable to identify and evaluate the status of batteries entering the battery swap cabinets. At the same time, no one is aware of any abnormal conditions in the batteries. This is very dangerous for the increasingly popular use of batteries. In addition, these battery swap cabinets will only recycle batteries when they are found to have extremely low battery life or even become unusable. At this time, battery recycling is difficult and has no economic value, making it impossible to effectively recycle resources.

[0007] Therefore, it is necessary to provide a battery swap cabinet control system and method to control the battery charging temperature to avoid the impact of high-temperature charging on the battery, and at the same time provide a better charging method for batteries in different states, further improve the battery life, and evaluate the status of the batteries in the charging cabinet to avoid abnormal batteries being replaced with other vehicles. This is beneficial to ensuring the quality of batteries replaced by the battery swap cabinet, and is conducive to timely battery recycling. The recycling of semi-degraded batteries is more convenient. Summary of the invention

[0008] In order to solve the above technical problems, the present invention provides a battery swap cabinet control system and method thereof to solve the above technical problems.

[0009] A battery swap cabinet control system, comprising a battery swap cabinet, wherein a plurality of charging grids for charging batteries are arranged in the battery swap cabinet, wherein the charging grids are equipped with a scanning unit for identifying battery models and battery codes, and wherein the charging grids are equipped with a charging module, a temperature control module, a battery capacity detection module, and an internal resistance detection module;

[0010] The battery has a built-in SOC module and SOH module, where:

[0011] Charging module: charges the batteries sent into the charging grid;

[0012] Temperature control module: monitors and controls the internal temperature of the charging grid and the temperature of the rechargeable battery;

[0013] Battery capacity detection module: detects the capacity of the battery entering the charging grid;

[0014] Internal resistance detection module: performs internal resistance detection on the battery connected to the charging module during the charging process;

[0015] SOC module: detects and indicates the remaining battery power in 100%;

[0016] SOH module: detects the ratio of battery performance parameters to nominal parameters;

[0017] During the battery replacement process, the control system controls the internal temperature of the predetermined charging grid, and monitors the temperature of the battery itself after the battery is sent to the charging grid. The temperature control charging method during the battery charging process is adjusted according to the detection temperature and the detection result of the battery capacity detection module on the battery capacity;

[0018] The data is uploaded to the control system through the charging module, temperature control module, battery capacity detection module and internal resistance detection module. The control system determines the battery health value and uploads it to the cloud, and updates the SOC module and SOH module data of the charging battery.

[0019] The battery health value is determined as follows:

[0020] S: Charging speed

[0021] K: Charging temperature change

[0022] T: Rechargeable battery level

[0023] R: Internal resistance of rechargeable battery

[0024] C: Number of charge and discharge cycles

[0025] D: Self-discharge rate

[0026] U: Voltage stability

[0027] M: Battery health value

[0028] ;

[0029] in:

[0030] is the reference value;

[0031] are weight factors, and their sum is equal to 1, that is, ;

[0032] Safety: M≥80%

[0033] Maintenance required: 60%≤M<80%

[0034] Need to be scrapped: M<60%.

[0035] Preferably, the temperature-controlled charging mode is adjusted according to the capacity of the battery to be charged, and the SOC module collects the remaining battery power, and sets three threshold ranges: a first threshold range of 0%-20%, a second threshold range of 20%-70%, and a third threshold range of 70%-90%. In the first threshold range, the temperature control module increases the internal temperature of the charging grid to 40° and maintains it, and the charging module enters a high-power fast charging mode. In the second threshold range, the temperature control module performs constant temperature heat dissipation control on the temperature of the battery. The charging power of the charging module is inversely proportional to the capacity, and changes from high power to low power. In the third threshold range, the temperature control module ensures that the temperature of the charging grid and the battery is constant at 20°-30°, and the charging module enters a low-power slow charging mode.

[0036] Preferably, the control system identifies the battery model through the scanning unit, and the charging module provides the charging power and time to calculate the charging capacity, and then the sum of the charging capacity and the remaining capacity shown by the SOC module should be the total capacity of the battery model. If the sum of the charging capacity and the remaining capacity shown by the battery SOC module is the total capacity, the battery capacity has not decayed; otherwise, it means that the battery capacity has begun to decay, and the decaying battery needs to be marked.

[0037] Preferably, the battery code of the attenuated battery is uploaded to the cloud through the control system, and the cloud transmits the battery code of the marked attenuated battery to each battery swap cabinet. When the remaining battery swap cabinets charge the battery code again, the temperature control module controls the charging temperature at 32°-38° and modifies the information of the SOH module of the battery.

[0038] Preferably, the internal resistance detection module is started by the control system to detect the internal resistance of the un-attenuated battery. The control system sets a threshold range for the internal resistance of the un-attenuated battery. The internal resistance within the threshold range is normal, and the internal resistance exceeding the threshold range is abnormal. The control system uploads the battery code of the battery with abnormal internal resistance to the cloud.

[0039] Preferably, the battery has a built-in chip, which includes the following information: battery model, battery parameters, battery production date, and battery charging times.

[0040] A battery swap cabinet control method:

[0041] S1: The battery replacement is sent to the battery swap cabinet, and the battery model and battery code of the battery are identified by the scanning unit. The control system reads the battery chip, or connects to the cloud to query the battery code to understand the battery information, including the battery model and charge and discharge times;

[0042] S2: Upload data to the control system through the charging module, temperature control module, battery capacity detection module and internal resistance detection module, and evaluate the battery health through parameters such as charging speed, charging temperature change, charging battery power, charging battery internal resistance, number of charge and discharge cycles, self-discharge rate, voltage stability, etc. There are three types of battery status monitoring: the first type calculates the battery health value, the second type determines whether the battery is attenuated, and the third type determines whether the internal resistance is normal. Among them, the first and the third are in an AND or OR relationship, the first type includes the second type, and the second and the third are in a parallel relationship;

[0043] S3: S3 and S2 are implemented in parallel. The control system starts the charging module to charge the battery. The temperature control module controls the internal temperature of the charging grid. After the battery is sent to the charging grid, the temperature of the battery itself is monitored. The SOC module collects three ranges of the remaining battery power, the first threshold range 0%-20%, the second threshold range 20%-70% and the third threshold range 70%-90%, and three temperature control charging methods are used respectively;

[0044] S4: The control system uploads the battery health value to the cloud and updates the SOC module and SOH module data of the charging battery;

[0045] S5: For batteries in S2 that are charging too slowly, have abnormal charging temperatures, unstable voltages, abnormal internal resistance values, battery health values ​​that exceed safety ranges, and are attenuated, the control system needs to upload the battery code to the cloud and suspend charging of the abnormal batteries.

[0046] Compared with the related art, the battery swap cabinet control system and method provided by the present invention have the following beneficial effects:

[0047] 1. The present invention uses a battery capacity detection module to detect the remaining battery power through a control system, selects three different charging methods based on the battery's own status, further controls the battery charging temperature, avoids the impact of high-temperature charging on the battery, and provides a better charging method for batteries in different states, further improving the battery life.

[0048] 2. The present invention can judge the health status of the battery according to the battery temperature, battery internal resistance, battery power changes and the data in the battery's own SOC module and SOH module during the battery charging process. For example, if the battery has not decayed, but the battery internal resistance value exceeds the threshold range, the battery may be aged, overcharged or over-discharged, or the battery may be bumped. For another example, if the sum of the battery charge and the remaining power detected by the battery capacity detection module is less than the total power of the battery model, it means that the battery has decayed, which is beneficial to the status evaluation of the battery in the charging cabinet.

[0049] 3. The present invention uses a control system to scan the battery code of the battery being charged through the scanning unit, and uploads the battery status to the cloud. The cloud can then read the battery status of the battery code, and can recover and repair abnormal batteries, or replace abnormal batteries in the battery swap cabinet in advance to avoid replacing abnormal batteries on other vehicles, which is beneficial to ensuring the quality of batteries replaced by the battery swap cabinet.

[0050] 4. After the present invention uses the control system to identify the data of any group of batteries passing through the battery swap cabinet and upload it to the cloud, the status of all batteries passing through the battery swap cabinet can be intuitively understood from the cloud, which is conducive to mastering the battery decay cycle and timely recycling of batteries. The recycling of semi-decayed batteries is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 A schematic diagram of a battery swap cabinet and battery components of a battery swap cabinet control system and method provided by the present invention;

[0052] Figure 2 A schematic diagram of the overall control flow of a battery swap cabinet control system and method provided by the present invention;

[0053] Figure 3 A schematic diagram of three flow charts of a temperature module of a battery swap cabinet control system and method provided by the present invention;

[0054] Figure 4 A schematic diagram of the battery health value assessment process of a battery swap cabinet control system and method provided by the present invention. DETAILED DESCRIPTION

[0055] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] Embodiment 1

[0057] A battery swap cabinet control system, including a battery swap cabinet, a battery with a built-in chip, the chip includes the following information, battery model, battery parameters, battery production date and battery charging times information, the battery swap cabinet is provided with a plurality of charging grids for charging the battery, the charging grid is built with a scanning unit for identifying the battery model and battery code, and the charging grid is built with a charging module, a temperature control module, a battery capacity detection module, and an internal resistance detection module;

[0058] The battery has a built-in SOC module and SOH module, where:

[0059] Charging module: charges the battery sent to the charging grid, which includes a rectifier, filter, transformer, control circuit, power switch, protection circuit, and communication interface;

[0060] Temperature control module: monitors and controls the internal temperature of the charging grid and the temperature of the rechargeable battery;

[0061] Battery capacity detection module: detect the capacity of the battery entering the charging grid. By connecting the battery and setting the corresponding test parameters with a tester or multimeter, the remaining battery percentage can be directly read;

[0062] Internal resistance detection module: The internal resistance of the battery connected to the charging module is detected during the charging process. The DC internal resistance test method can be used to apply a constant DC current to the battery and then measure the voltage drop across the battery to calculate the internal resistance of the battery. It is usually used for large-capacity batteries, such as lead-acid batteries and lithium batteries. SOC refers to the available state of the remaining charge in the battery, usually expressed as a percentage.

[0063] The SOC value can be calculated by integrating the battery current reading over the usage time, or estimated using the relationship between the battery's open circuit voltage and its SOC, but it should be noted that the accurate open circuit voltage can only be obtained after the battery has been stationary for a period of time.

[0064] SOH module: detects the ratio of battery performance parameters to nominal parameters; it is a key component for evaluating battery performance degradation and remaining life. SOH refers to the performance level of the battery in its current state relative to a new battery, usually expressed as a percentage.

[0065] SOH is predicted by monitoring the change in battery capacity over time and cycle number.

[0066] During the battery replacement process, the control system controls the internal temperature of the predetermined charging grid, and monitors the temperature of the battery itself after the battery is sent to the charging grid. The temperature control charging method during the battery charging process is adjusted according to the detection temperature and the detection result of the battery capacity detection module on the battery capacity;

[0067] The temperature control charging mode is adjusted according to the capacity of the battery to be charged, and three threshold ranges are set: the first threshold range 0%-20%, the second threshold range 20%-70% and the third threshold range 70%-90%;

[0068] The SOC module collects the remaining battery power. When the remaining power is within the first threshold range, the temperature control module increases the internal temperature of the charging grid to 40° and maintains it, and the charging module enters a high-power fast charging mode. In the second threshold range, the temperature control module performs constant temperature heat dissipation control on the battery temperature. The charging power of the charging module is inversely proportional to the capacity, and changes from high power to low power. In the third threshold range, the temperature control module ensures that the temperature of the charging grid and the battery is constant at 20°-30°, and the charging module enters a low-power slow charging mode. The temperature control module can automatically adjust the charging current and voltage according to the battery status and environmental conditions to ensure that the battery is protected to the maximum extent while ensuring the charging speed.

[0069] The data is uploaded to the control system through the charging module, temperature control module, battery capacity detection module and internal resistance detection module. The control system determines the battery health value and uploads it to the cloud, and updates the SOC module and SOH module data of the charging battery.

[0070] The battery health value is determined as follows:

[0071] S: Charging speed

[0072] K: Charging temperature change

[0073] T: Rechargeable battery level

[0074] R: Internal resistance of rechargeable battery

[0075] C: Number of charge and discharge cycles

[0076] D: Self-discharge rate

[0077] U: Voltage stability

[0078] M: Battery health value

[0079] ;

[0080] in:

[0081] It is a reference value.

[0082] For quoting or reference values, it is necessary to refer to specific battery products. Currently, the common fast charging speed S of automobiles is 37.5 kW; the slow charging speed S of automobiles is 7~14kW;

[0083] The general battery capacity is 30-100 kilowatts, and the rechargeable battery capacity T is also in this range;

[0084] The common battery internal resistance R is 10-20 milliohms;

[0085] The common battery voltage is stable between 13.5-14.5V;

[0086] It is a special subset of the partially ordered set, which is the ideal charging temperature change;

[0087] Respectively represent the maximum and minimum values ​​of charging temperature change;

[0088] Represent the maximum and minimum values ​​of the battery internal resistance respectively;

[0089] Represents the maximum number of battery charge and discharge cycles;

[0090] It is a special subset of the partially ordered set and is the ideal self-discharge rate;

[0091] are weight factors, and their sum is equal to 1, that is, .

[0092] Safety: M≥80%

[0093] Maintenance required: 60%≤M<80%

[0094] Need to be scrapped: M<60%.

[0095] The variables in the above formula need to be related to the battery material, battery production process, battery capacity and battery energy density, and need to be adjusted according to the actual product.

[0096] The above formula can be used to evaluate the battery entering the charging grid. When the battery is in a safe state, the fast charging mode can be used for rapid energy replenishment. If the battery is in a state of requiring maintenance, it is necessary to strictly control the charging power change and temperature change during charging. If the battery is in a state of needing to be scrapped, it is necessary to promptly notify personnel to remove the battery from the battery swap cabinet. It should be noted that the battery can be recycled when it enters the half-life period. For example, lithium batteries have a half-decay period. The half-decay period refers to the time required for the performance of the material to be reduced to half of the initial performance. At the half-life period, the valuable materials in the battery have not yet completely degraded, and their content is relatively high, so the recycling efficiency is higher. The existing mature technology and equipment can be used to improve the recovery rate and the purity of the materials.

[0097] Embodiment 2

[0098] The scanning unit enables the control system to identify the battery model, and the charging module provides the charging power and time to calculate the charging capacity, and then the sum of the charging capacity and the remaining capacity shown by the SOC module should be the total capacity of the battery model. If the sum of the charging capacity and the remaining capacity shown by the battery SOC module is the total capacity, the battery capacity has not decayed. Otherwise, it means that the battery capacity has begun to decay. In this case, it is necessary to mark the decayed battery and upload the battery status to the cloud. The cloud can then read the battery status coded by the battery, and the abnormal battery can be recovered and repaired, or the abnormal battery in the battery swap cabinet can be replaced in advance to avoid replacing the abnormal battery on other vehicles.

[0099] Embodiment 3

[0100] The battery code of the attenuated battery is uploaded to the cloud through the control system, and the cloud transmits the battery code of the marked attenuated battery to each battery swap cabinet. When the remaining battery swap cabinets charge the battery code again, the temperature control module controls the charging temperature at 32°-38° and modifies the information of the SOH module of the battery, thereby extending the battery attenuation cycle by further controlling the charging temperature.

[0101] The temperature control module includes a cooling component that can be cooled by water circulation. Multiple pipes surround the battery to achieve the cooling effect. At the same time, in the event of a sudden fire, water can be sprayed through the nozzle of the water circulation pipe to avoid fire.

[0102] Embodiment 4

[0103] The control system starts the internal resistance detection module to detect the internal resistance of the un-attenuated battery. The control system sets a threshold range for the internal resistance of the un-attenuated battery. The internal resistance within the threshold range is normal, and the internal resistance exceeding the threshold range is abnormal. The battery may be aged, overcharged or over-discharged, or the battery may be bumped. The control system uploads the battery code of the battery with abnormal internal resistance to the cloud.

[0104] A battery swap cabinet control method:

[0105] The battery replacement is sent to the battery swap cabinet, and the battery model and battery code of the battery are identified by the scanning unit. The control system reads the battery chip, or connects to the cloud to query the battery code to understand the battery information, including the battery model and charge and discharge times. If the charge and discharge times reach the threshold, for example, more than 800 times, the battery is at a greater risk of attenuation.

[0106] The data is uploaded to the control system through the charging module, temperature control module, battery capacity detection module and internal resistance detection module. The battery health is evaluated through parameters such as charging speed, charging temperature change, battery capacity, battery internal resistance, number of charge and discharge cycles, self-discharge rate, and voltage stability. There are three types of battery status monitoring: the first type calculates the battery health value, the second type determines whether the battery is attenuated, and the third type determines whether the internal resistance is normal. Among them, the first and the third types are in an AND or OR relationship, the first type includes the second type, and the second and the third type are in a parallel relationship. In the actual battery use process, the battery health value is M ≥ 80% or 60% ≤ M < 80 % range, the internal resistance of the battery increases significantly, indicating that the battery has the following risks: battery shell expansion, colloid membrane rupture, and metal ion melting in the electrolyte. Therefore, the battery is in the first healthy state, and the third internal resistance abnormality occurs. This is because the battery has multiple groups of cells. The increase in the internal resistance of a single group or a single cell has a relatively small impact on the health value. Therefore, the first battery in a healthy state and the third internal resistance abnormality can exist separately or simultaneously. When the battery health state is M<60%, the internal resistance problem can be ignored and the battery can be recycled;

[0107] When the battery decays, the corresponding data of the battery's charging speed, charging temperature change, charging battery power, charging battery internal resistance, charging and discharging cycle number, self-discharge rate, and voltage stability will change to a certain extent, which will be directly reflected in the battery's health value. Therefore, the first type includes the second type. When the first health value M < 60%, it means that the battery has decayed;

[0108] When the battery decays, the electrode material will age, the SEI film will form and thicken, and the active substance will fall off, all of which will cause the battery's internal resistance to increase. Therefore, the battery's decay will directly lead to an increase in the battery's internal resistance, so the second and third types exist simultaneously.

[0109] When the battery health value is within the normal range, but the internal resistance value is abnormal, it means that the battery is at a high risk of being bumped and needs to be repaired or recycled in time;

[0110] When the battery degrades, the health value of the battery also decreases.

[0111] The control system starts the charging module to charge the battery, and the temperature inside the charging grid is controlled by the temperature control module. The temperature of the battery itself is monitored after the battery is sent to the charging grid. The temperature control charging method during the battery charging process is adjusted according to the detection temperature and the detection result of the battery capacity detection module on the battery capacity;

[0112] The temperature control charging mode is adjusted according to the capacity of the battery to be charged, and three threshold ranges are set: the first threshold range 0%-20%, the second threshold range 20%-70% and the third threshold range 70%-90%;

[0113] The SOC module collects the remaining battery power. When the remaining power is within the first threshold range, the temperature control module increases the internal temperature of the charging grid to 40° and maintains it, and the charging module enters a high-power fast charging mode. In the second threshold range, the temperature control module performs constant temperature heat dissipation control on the battery temperature. The charging power of the charging module is inversely proportional to the capacity, and changes from high power to low power. In the third threshold range, the temperature control module ensures that the temperature of the charging grid and the battery is constant at 20°-30°, and the charging module enters a low-power slow charging mode. The temperature control module can automatically adjust the charging current and voltage according to the battery status and environmental conditions to ensure that the battery is protected to the maximum extent while ensuring the charging speed.

[0114] The control system uploads the battery health value to the cloud and updates the SOC module and SOH module data of the charging battery;

[0115] For batteries with slow charging speed, abnormal charging temperature, unstable voltage, abnormal internal resistance, battery health value exceeding the safe range, and attenuated battery, the battery code needs to be uploaded to the cloud through the control system, and charging of the abnormal battery should be suspended.

[0116] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A battery exchange cabinet control system, comprising a battery exchange cabinet, wherein a plurality of charging grids for charging batteries are arranged in the battery exchange cabinet, and a scanning unit for identifying a battery model and a battery code is built into the charging grid, characterized in that: The charging grid has built-in charging module, temperature control module, battery capacity detection module, and internal resistance detection module; The battery has a built-in SOC module and SOH module, where: Charging module: charges the batteries sent into the charging grid; Temperature control module: monitors and controls the internal temperature of the charging grid and the temperature of the rechargeable battery; Battery capacity detection module: detects the capacity of the battery entering the charging grid; Internal resistance detection module: performs internal resistance detection on the battery connected to the charging module during the charging process; SOC module: detects and indicates the remaining battery power in 100%; SOH module: detects the ratio of battery performance parameters to nominal parameters; During the battery replacement process, the control system controls the internal temperature of the predetermined charging grid, and monitors the temperature of the battery itself after the battery is sent to the charging grid. The temperature control charging method during the battery charging process is adjusted according to the detection temperature and the detection result of the battery capacity detection module on the battery capacity; The data is uploaded to the control system through the charging module, temperature control module, battery capacity detection module and internal resistance detection module. The control system determines the battery health value and uploads it to the cloud, and updates the SOC module and SOH module data of the charging battery; The battery health value is determined as follows: S: Charging speed K: Charging temperature change T: Rechargeable battery level R: Internal resistance of rechargeable battery C: Number of charge and discharge cycles D: Self-discharge rate U: Voltage stability M: Battery health value ； in: It is a special subset of the partially ordered set, which is the ideal charging temperature change; Respectively represent the maximum and minimum values ​​of charging temperature change; Represent the maximum and minimum values ​​of the battery internal resistance respectively; Represents the maximum number of battery charge and discharge cycles; It is a special subset of the partially ordered set and is the ideal self-discharge rate; For quotations or reference values, reference to specific battery products is required; are weight factors, and their sum is equal to 1, that is, ; Safety: M≥80% Maintenance required: 60%≤M<80% Need to be scrapped: M<60%.

2. A battery swap cabinet control system according to claim 1, characterized in that: The temperature-controlled charging method is adjusted according to the capacity of the battery to be charged. The SOC module collects the remaining battery power and sets three threshold ranges: a first threshold range of 0%-20%, a second threshold range of 20%-70%, and a third threshold range of 70%-90%. In the first threshold range, the temperature control module increases the internal temperature of the charging grid to 40° and maintains it, and the charging module enters a high-power fast charging mode. In the second threshold range, the temperature control module performs constant temperature heat dissipation control on the temperature of the battery. The charging power of the charging module is inversely proportional to the capacity, and changes from high power to low power. In the third threshold range, the temperature control module ensures that the temperature of the charging grid and the battery is constant at 20°-30°, and the charging module enters a low-power slow charging mode.

3. A battery swap cabinet control system according to claim 1, characterized in that: The scanning unit enables the control system to identify the battery model, and the charging module provides the charging power and time to calculate the charging capacity, and then the sum of the charging capacity and the remaining capacity shown by the SOC module should be the total capacity of the battery model. If the sum of the charging capacity and the remaining capacity shown by the battery SOC module is the total capacity, the battery capacity has not decayed; otherwise, it means that the battery capacity has begun to decay, and the decaying battery needs to be marked.

4. A battery swap cabinet control system according to claim 3, characterized in that: The battery code of the attenuated battery is uploaded to the cloud through the control system, and the cloud transmits the battery code of the marked attenuated battery to each battery swap cabinet. When the remaining battery swap cabinets charge the battery code again, the temperature control module controls the charging temperature at 32°-38° and modifies the information of the SOH module of the battery.

5. A battery swap cabinet control system according to claim 3, characterized in that: The internal resistance detection module is started by the control system to detect the internal resistance of the un-attenuated battery. The control system sets a threshold range for the internal resistance of the un-attenuated battery. The internal resistance within the threshold range is normal, and the internal resistance exceeding the threshold range is abnormal. The control system uploads the battery code of the abnormal internal resistance battery to the cloud.

6. A battery swap cabinet control system according to claim 1, characterized in that: The battery has a built-in chip that contains the following information: battery model, battery parameters, battery production date, and battery charge times.

7. A battery swap cabinet control method, applied to a battery swap cabinet control system according to any one of claims 1 to 6, characterized in that: S1: The battery replacement is sent to the battery swap cabinet, and the battery model and battery code of the battery are identified by the scanning unit. The control system reads the battery chip, or connects to the cloud to query the battery code to understand the battery information, including the battery model and charge and discharge times; S2: Upload data to the control system through the charging module, temperature control module, battery capacity detection module and internal resistance detection module, and evaluate the battery health through parameters such as charging speed, charging temperature change, battery capacity, internal resistance of the battery, number of charge and discharge cycles, self-discharge rate and voltage stability. There are three types of battery status monitoring: the first type calculates the battery health value, the second type determines whether the battery is attenuated, and the third type determines whether the internal resistance is normal. Among them, the first and the third types are in an AND or OR relationship, the first type includes the second type, and the second and the third type are in a parallel relationship; S3: S3 and S2 are implemented in parallel. The control system starts the charging module to charge the battery. The temperature control module controls the internal temperature of the charging grid. After the battery is sent to the charging grid, the temperature of the battery itself is monitored. The SOC module collects three ranges of the remaining battery power, the first threshold range 0%-20%, the second threshold range 20%-70% and the third threshold range 70%-90%, and three temperature control charging methods are used respectively; S4: The control system uploads the battery health value to the cloud and updates the SOC module and SOH module data of the charging battery; S5: For batteries in S2 that are charging too slowly, have abnormal charging temperatures, unstable voltages, abnormal internal resistance values, battery health values ​​that exceed safety ranges, and are attenuated, the control system needs to upload the battery code to the cloud and suspend charging of the abnormal batteries.

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