Balcony photovoltaic temperature control system and method and balcony photovoltaic system

Abstract

The embodiment of the invention provides a balcony photovoltaic temperature control system and method and a balcony photovoltaic system, and the system comprises a metal housing which is internally provided with an accommodation cavity; the battery pack is arranged in the accommodating cavity; the semiconductor chilling plate is arranged between the metal shell and the battery pack and is used for refrigerating or heating the battery pack; and the battery management control module is connected with the semiconductor chilling plate and is used for controlling the semiconductor chilling plate. According to the embodiment of the invention, the battery pack is heated and refrigerated through the semiconductor chilling plate, the complexity and cost of the balcony photovoltaic temperature control system are reduced, and the temperature control precision and efficiency of the balcony photovoltaic temperature control system are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of balcony photovoltaics, and in particular to a balcony photovoltaic temperature control system, a balcony photovoltaic temperature control method, and a balcony photovoltaic system. Background Art

[0002] With the growing global demand for renewable energy and people's pursuit of clean energy and improved quality of life, balcony photovoltaics are gradually gaining favor in the market as a convenient and efficient home energy solution. Balcony photovoltaic systems are usually placed outdoors, and the performance and life of their core components, energy storage batteries, will be affected by the temperature difference between north and south, and between winter and summer, causing the balcony photovoltaic system to fail to operate normally due to excessively high or low temperatures. However, the current temperature control of photovoltaics is based on two independent solutions for heating or cooling, which are complex in design, high in cost, and low in accuracy and efficiency. Summary of the invention

[0003] In view of the above problems, embodiments of the present invention are proposed to provide a balcony photovoltaic temperature control system, a balcony photovoltaic temperature control method, and a balcony photovoltaic system that overcome the above problems or at least partially solve the above problems.

[0004] In order to solve the above problems, in a first aspect of the present invention, an embodiment of the present invention discloses a balcony photovoltaic temperature control system, comprising:

[0005] A metal shell with a receiving cavity inside;

[0006] A battery pack is disposed in the accommodating cavity;

[0007] A semiconductor cooling sheet is disposed between the metal housing and the battery pack and is used to cool or heat the battery pack;

[0008] A battery management control module is connected to the semiconductor refrigeration chip and is used to control the semiconductor refrigeration chip.

[0009] Optionally, it also includes:

[0010] The sampling circuit is arranged between the battery management control module and the battery pack, and is used for sampling data of the battery pack, generating a sampling signal and outputting the sampling signal to the battery management control module.

[0011] Optionally, it also includes:

[0012] The insulation detection circuit is arranged between the metal shell and the battery management control module and is used for performing insulation detection.

[0013] Optionally, it also includes:

[0014] The charge and discharge control circuit is arranged between the battery management control module and the battery pack, and is used to control the charge and discharge of the battery pack.

[0015] Optionally, the cooling surface of the semiconductor cooling sheet is in contact with the battery pack, and the cooling surface of the semiconductor heating sheet is in contact with the metal shell.

[0016] In a second aspect of the present invention, an embodiment of the present invention discloses a balcony photovoltaic temperature control method, which is applied to a battery management control module, wherein the semiconductor refrigeration sheet is connected, and the semiconductor refrigeration sheet is arranged between a metal shell and a battery pack, and the method comprises:

[0017] Detecting the temperature of the battery cells of the battery pack;

[0018] The semiconductor refrigeration sheet is controlled according to the battery core temperature to cool or heat the battery pack, as well as the charge and discharge state of the battery pack.

[0019] Optionally, the step of controlling the semiconductor refrigeration sheet to cool or heat the battery pack and the charge and discharge state of the battery pack according to the battery core temperature includes:

[0020] When the battery core temperature is not greater than the discharge low temperature protection threshold, controlling the semiconductor refrigeration sheet to heat the battery pack, and setting the charge and discharge state to a charge and discharge prohibited state;

[0021] When the battery cell temperature is greater than a discharge low temperature protection threshold and not greater than a charge low temperature protection threshold, controlling the semiconductor cooling sheet to heat the battery pack, and setting the charge and discharge state to a discharge-enabled charge-disabled state;

[0022] When the battery cell temperature is greater than a charging low temperature protection threshold and not greater than a charging high temperature protection threshold, setting the charging and discharging state to a charging and discharging enabled state;

[0023] When the battery cell temperature is greater than a charging high temperature protection threshold and not greater than a discharging high temperature protection threshold, setting the charging and discharging state to a discharging enabled charging prohibited state;

[0024] When the battery cell temperature is greater than a discharge high temperature protection threshold, the semiconductor refrigeration sheet is controlled to cool the battery pack, and the charge and discharge state is set to a charge and discharge prohibited state.

[0025] Optionally, the method further comprises:

[0026] In response to the power-on instruction, a self-test is performed and self-test result information is generated.

[0027] Optionally, the method further comprises:

[0028] In response to the self-test result information indicating that the self-test is normal, detecting the cell voltage of the battery pack;

[0029] Self-balancing control is performed according to the cell voltage.

[0030] In a third aspect of the present invention, an embodiment of the present invention discloses a balcony photovoltaic system, including a photovoltaic panel and the balcony photovoltaic temperature control system as described above.

[0031] The embodiments of the present invention include the following advantages:

[0032] The embodiment of the present invention has a metal shell with a receiving cavity inside; a battery pack is arranged in the receiving cavity; a semiconductor cooling sheet is arranged between the metal shell and the battery pack for cooling or heating the battery pack; and a battery management control module is connected to the semiconductor cooling sheet for controlling the semiconductor cooling sheet. The battery pack is heated and cooled by the semiconductor cooling sheet, which reduces the complexity and cost of the balcony photovoltaic temperature control system and improves the accuracy and efficiency of the temperature control of the balcony photovoltaic temperature control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of an embodiment of a balcony photovoltaic temperature control system of the present invention;

[0034] Figure 2 It is a schematic diagram of a semiconductor refrigeration sheet of the present invention;

[0035] Figure 3 It is a schematic diagram of a driving circuit of a semiconductor refrigeration chip of the present invention;

[0036] Figure 4 is a block diagram of a battery management control module of the present invention;

[0037] Figure 5 It is a general block diagram of a balcony photovoltaic system of the present invention;

[0038] Figure 6 It is a flow chart of steps of an embodiment of a balcony photovoltaic temperature control method of the present invention;

[0039] Figure 7 It is a flow chart of detection steps of an example of a balcony photovoltaic temperature control method of the present invention;

[0040] Figure 8 is a flowchart of another balcony photovoltaic temperature control method embodiment of the present invention;

[0041] Fig. 9 It is a flow chart of temperature control steps of an example of a balcony photovoltaic temperature control method of the present invention. DETAILED DESCRIPTION

[0042] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] Reference Figure 1 , shows a schematic diagram of the structure of an embodiment of a balcony photovoltaic temperature control system of the present invention. The balcony photovoltaic temperature control system comprises:

[0044] A metal shell 19, with a receiving cavity inside;

[0045] A battery pack 5 is disposed in the accommodating cavity;

[0046] A semiconductor cooling sheet 20 is disposed between the metal housing 19 and the battery pack 5 and is used to cool or heat the battery pack 5;

[0047] The battery management control module 4 is connected to the semiconductor refrigeration chip 20 and is used to control the semiconductor refrigeration chip 20 .

[0048] In an embodiment of the present invention, the balcony photovoltaic temperature control system may include a metal shell 19 , a battery pack 5 , a semiconductor cooling sheet 20 and a battery management control module 4 .

[0049] The metal shell 19 is a bearing base, and a receiving cavity is provided inside the metal shell to accommodate other components. The metal shell 19 resists various influences of the external environment, such as wind, sand, rain, snow, high temperature, low temperature, etc., thereby protecting the internal components from damage. And effectively transfer the internal heat to the external environment, thereby ensuring the stable operation of the balcony photovoltaic temperature control system.

[0050] The battery pack 5 can be arranged in the receiving cavity. The battery pack 5 can be composed of multiple groups of battery cells, such as Figure 1 As shown, 16 lithium iron phosphate battery cells can be connected in series. The battery pack 5 can be filled with composite phase change materials to improve thermal conductivity and prevent uneven heating of the battery cells during heating.

[0051] The semiconductor cooling sheet 20 is arranged between the metal shell 19 and the battery pack 5, and controls the direction of the current passed through the battery management control module 4 to perform cooling or heating. Figure 2 As shown, when the current direction of the DC power supply 27 flows from right to left, the upper substrate 23 of the semiconductor refrigeration plate 20 is the cooling end, and the lower substrate 26 is the heating end; when the current direction of the DC power supply 27 flows from left to right, the upper substrate 23 of the refrigeration plate is the heating end, and the lower substrate 26 is the cooling end.

[0052] The semiconductor cooling sheet 20 can be symmetrically arranged on the long side end surface of the battery pack 5. The cooling surface of the semiconductor cooling sheet 20 is in close contact with the surface of the battery pack 5. When the battery pack 5 is cooled, the cooling capacity can be directly transferred to the battery pack 5 to improve the cooling efficiency. The heating surface of the semiconductor cooling sheet 20 is in close contact with the metal shell 19. When heating, the metal shell 19 is indirectly used to heat the battery pack 5 to prevent the battery pack 5 from directly contacting the heat source, thereby protecting the safety of the battery pack 5.

[0053] The battery management control module 4 is connected to the semiconductor refrigeration chip 20 to control the current direction of the semiconductor refrigeration chip 20 so that the semiconductor refrigeration chip 20 performs cooling or heating.

[0054] Specifically, the semiconductor cooling sheet can be provided with a corresponding driving circuit, and the battery management control module can adjust the current direction of the semiconductor cooling sheet by controlling the switch on the driving circuit, thereby achieving cooling or heating. Figure 3 , four NMOS (N-trench field effect transistor) tubes: NMOS tube Q1, NMOS tube Q2, NMOS tube Q3, and NMOS tube Q4 together constitute an H-bridge circuit. The battery management module controls the H-bridge circuit by controlling the PWM (pulse width modulation) duty cycle. When the input end (IN) of the driver chip is at a high level, the output end (HO) is high, the output end (LO) is low, the NMOS tube Q1 and NMOS tube Q4 are turned on, and the semiconductor refrigeration sheet is cooled. When the input end (IN) of the driver chip is at a low level, the output end (HO) is low, the output end (LO) is high, the NMOS tube Q2 and NMOS tube Q3 are turned on, and the semiconductor refrigeration sheet is heated, thereby realizing cooling and heating of the battery pack.

[0055] Further, the battery management control module 4 may include the following functions, referring to Figure 4 , the battery pack 5 status is monitored, temperature management and fault protection are performed according to the monitoring results, and the charge and discharge control flag is sent to the DCDC (direct current) module 9. The voltage and temperature sampling circuit 11 transmits the battery pack temperature and the voltage of each battery cell to the MCU (microelectronic control power supply) control module 13 through the SPI (serial peripheral interface) communication circuit 12. The insulation detection circuit 16 is used to determine whether the metal shell of the whole machine is insulated. The current acquisition circuit 17 collects the total current of the circuit, and estimates the SOC (state of charge) in combination with the battery pack voltage and temperature, and sends the current and SOC estimation results to the MCU control module 13. The MCU control module 13 performs charge and discharge control. The charge and discharge control signal is sent and received between the MCU control module 13 and the DCDC module 9 through the CAN (local area network) communication circuit 10. The MOS switch drive circuit 14 is used to drive the on and off of the charge and discharge control circuit 15. The semiconductor refrigeration plate drive circuit 18 heats or cools the battery pack 5 by controlling the current direction flowing through the semiconductor refrigeration plate.

[0056] In an optional embodiment of the present invention, the balcony photovoltaic temperature control system also includes: a sampling circuit, which is arranged between the battery management control module and the battery pack, and is used to sample data from the battery pack, generate a sampling signal and output it to the battery management control module.

[0057] In the embodiment of the present invention, the balcony photovoltaic temperature control system can also be provided with a sampling circuit, which is provided between the battery management control module and the battery pack, and the battery pack is sampled by the sampling circuit, including but not limited to temperature sampling, voltage sampling, and current sampling. The sampled data is converted into a sampling signal and output to the battery management control module, and the battery management control module can perform corresponding temperature and charge and discharge control based on the sampling signal.

[0058] In one example, the sampling circuits may include a voltage sampling circuit, a current sampling circuit, and a temperature sampling circuit.

[0059] The voltage sampling circuit is usually composed of a voltage injection device, a capacitor charging device, a capacitor discharging device and a signal processing device. Voltage injection device: responsible for inputting external analog voltage or digital voltage into the circuit. Capacitor charging device: a capacitor that can stably store the sampled signal and help convert the analog voltage signal into a digital format. Capacitor discharging device: after the sampling is completed, the charge of the capacitor is discharged to prepare for the next sampling. Signal processing device: responsible for processing and displaying the sampled data.

[0060] The voltage sampling circuit is used to convert the voltage signal into a digital signal; it includes three steps: sampling, holding and quantization. Sampling: Read the input voltage signal periodically. This can be achieved through a switch control circuit that opens at a specific time interval and allows the voltage signal to enter the sampling circuit. The sampling time interval must be short enough to ensure that the sampling point can accurately represent the input signal. Holding: The voltage obtained from the last sample is held in a capacitor to prevent any changes in the input signal from affecting subsequent processing steps. The holding capacitor is usually a high-impedance device to ensure that the voltage can be maintained stably. Quantization: Convert the voltage in the holding capacitor into a digital signal, which is usually achieved using an analog-to-digital converter (ADC), which converts the continuous analog voltage signal into a discrete digital signal.

[0061] The specific sampling process is as follows: the voltage injection device inputs external analog voltage or digital voltage into the circuit. The capacitor charging device stores this input voltage on the capacitor, converts it into digital format, and then transmits it to the signal processing device. The signal processing device processes the incoming signal and displays the sampled voltage value on the display. The capacitor discharge device discharges the charge of the capacitor to prepare for the next sampling.

[0062] The current sampling circuit is usually composed of a current sensor, an operational amplifier, and a feedback resistor. Current sensor: used to convert current into a voltage signal. Operational amplifier: used to amplify the voltage signal and control the amplification factor through the feedback resistor. Feedback resistor: works with the operational amplifier to control the amplification factor. The current sampling circuit is based on Faraday's law of electromagnetic induction. When current passes through the current sampling circuit, a magnetic field is generated in the current sampling circuit, thereby inducing a voltage signal that is proportional to the current. After this voltage signal is amplified and processed, the required current value can be obtained. The specific sampling process is that the current sensor converts the current into a voltage signal. The operational amplifier amplifies this voltage signal and controls the amplification factor through the feedback resistor. The value of the original current is obtained by measuring the amplified voltage signal.

[0063] Temperature sampling circuits usually use sensors (such as thermistors) to detect temperature, and convert temperature signals into voltage signals for sampling through circuits. Including: Temperature sensor: such as thermistors, whose resistance value changes with temperature. Resistor voltage divider circuit: Works with the temperature sensor to form a voltage divider circuit to obtain a voltage signal corresponding to the temperature. Filtering and voltage following circuit: Filter and voltage follow the obtained voltage signal to improve the stability and accuracy of the signal. The temperature sampling circuit uses the characteristics of sensors such as thermistors that have different resistance values ​​at different temperatures to obtain voltage signals that vary with resistance values. By measuring this voltage signal, the corresponding temperature value can be inferred. The specific sampling process is that the temperature sensor (such as thermistors) has different resistance values ​​at different temperatures. Through the resistor voltage divider circuit, the resistance value of the temperature sensor is converted into a corresponding voltage signal. The obtained voltage signal is filtered and voltage followed to improve the stability and accuracy of the signal. The processed voltage signal is sent to the ADC for sampling and quantization, and finally the temperature value in digital form is obtained.

[0064] In an optional embodiment of the present invention, the balcony photovoltaic temperature control system further includes: an insulation detection circuit, which is arranged between the metal casing and the battery management control module and is used for insulation detection.

[0065] In an embodiment of the invention, an insulation detection circuit can also be set between the metal casing and the battery management control module. The insulation detection circuit can be used to detect whether the various parts in the balcony photovoltaic temperature control system are insulated to avoid leakage and improve the safety of the balcony photovoltaic temperature control system.

[0066] The insulation detection circuit is composed of a generator, a detector, and other electronic components such as resistors and capacitors. Generator: used to generate high voltage and introduce it into the equipment to be tested in order to test the insulation performance. Detector: used to measure parameters such as leakage current and insulation resistance to determine whether the insulation performance of the equipment to be tested meets the safety standards. Other components: such as resistors and capacitors, are used to assist in the insulation detection process, such as voltage division and filtering.

[0067] The principle of the insulation detection circuit is mainly based on Ohm's law and the measurement of leakage current. When the insulation performance of the balcony photovoltaic temperature control system to be inspected is good, its insulation resistance value is high and the leakage current is small; when the insulation performance decreases, the insulation resistance value decreases and the leakage current increases. By measuring parameters such as leakage current and insulation resistance, it can be determined whether the insulation performance of the balcony photovoltaic temperature control system to be inspected is qualified.

[0068] Specifically, after the high voltage generated by the generator is introduced into the balcony photovoltaic temperature control system to be tested, an electric field will be formed between the balcony photovoltaic temperature control system and the ground. If the insulation performance of the balcony photovoltaic temperature control system is good, the electric field strength will remain within the safe range and the leakage current will be small; if the insulation performance decreases, the electric field strength will increase and the leakage current will increase accordingly. The detector can monitor the insulation performance of the equipment in real time by measuring parameters such as leakage current and insulation resistance.

[0069] The specific sampling process may include the preparation stage: connect the generator to the device to be tested, and set the appropriate test voltage and test time. At the same time, ensure that the detector is in normal working condition. Test stage: start the generator and introduce high voltage into the device to be tested. At this time, the detector begins to measure parameters such as leakage current and insulation resistance. During the test, it is necessary to pay close attention to the readings of the detector to ensure the accuracy of the test results. Data processing stage: After the test is completed, the data of the detector is recorded and processed. According to the test results, it can be judged whether the insulation performance of the device to be tested is qualified, and appropriate measures can be taken for maintenance or replacement.

[0070] In an optional embodiment of the present invention, the balcony photovoltaic temperature control system further comprises:

[0071] The charge and discharge control circuit is arranged between the battery management control module and the battery pack, and is used to control the charge and discharge of the battery pack.

[0072] In an embodiment of the invention, a charge and discharge control circuit may be further provided between the battery management control module and the battery pack to control the temperature of the battery pack by controlling the charge and discharge of the battery pack, thereby achieving comprehensive temperature control.

[0073] The charge and discharge control circuit usually consists of the following main parts:

[0074] Power input: used to connect an external power source to provide the battery pack with the power required for charging. Switch control circuit: includes one or more switch tubes (such as field effect tubes, triodes, etc.) to control the on and off of the charging and discharging circuits. These switch tubes are usually controlled by a controller or a microprocessor. Charging and discharging circuit: the circuit part that actually performs charging and discharging, including components such as charging capacitors, inductors, resistors, and interfaces for connecting battery packs. Controller: includes detection ports, control logic, and necessary processing units to monitor the charging and discharging status of the battery pack, and control the on and off of the switch control circuit according to preset algorithms and thresholds. Detection circuit: used to detect parameters such as voltage, current, and temperature of the battery pack, and feed this information back to the controller. These detection circuits usually include sampling modules, ADCs (analog-to-digital converters), and necessary sensors.

[0075] The charging process is as follows: when an external power source is connected to the power input terminal, the controller starts to monitor the voltage and charging current of the battery pack. If the voltage of the battery pack is lower than the preset charging threshold, the controller will control the switch control circuit to close so that the charging current can flow into the battery pack. During the charging process, the controller monitors the voltage and current of the battery pack in real time through the detection circuit to ensure the safety and efficiency of the charging process. When the voltage of the battery pack reaches the preset full-charge voltage, the controller will control the switch control circuit to disconnect and stop charging.

[0076] The discharge process is as follows: when the battery pack provides power to external devices, the controller starts to monitor the voltage and discharge current of the battery pack. If the voltage of the battery pack is higher than the preset discharge threshold, the controller will allow the battery pack to continue discharging. During the discharge process, the controller also monitors the voltage and current of the battery pack in real time through the detection circuit to prevent abnormal conditions such as over-discharge or short circuit of the battery pack. When the voltage of the battery pack drops to the preset undervoltage voltage, the controller will control the relevant circuits to disconnect and stop discharging to protect the battery pack.

[0077] The embodiment of the present invention has a metal shell with a receiving cavity inside; a battery pack is arranged in the receiving cavity; a semiconductor cooling sheet is arranged between the metal shell and the battery pack for cooling or heating the battery pack; and a battery management control module is connected to the semiconductor cooling sheet for controlling the semiconductor cooling sheet. The battery pack is heated and cooled by the semiconductor cooling sheet, which reduces the complexity and cost of the balcony photovoltaic temperature control system and improves the accuracy and efficiency of the temperature control of the balcony photovoltaic temperature control system.

[0078] The embodiment of the present invention further discloses a balcony photovoltaic system, including a photovoltaic panel and the balcony photovoltaic temperature control system as described above.

[0079] By connecting the balcony photovoltaic temperature control system with the photovoltaic panels, the electrical energy converted from the photovoltaic panels can be stored or released, thereby realizing the balcony photovoltaic function.

[0080] The balcony photovoltaic temperature control system comprises:

[0081] A metal shell with a receiving cavity inside;

[0082] A battery pack is disposed in the accommodating cavity;

[0083] A semiconductor cooling sheet is disposed between the metal housing and the battery pack and is used to cool or heat the battery pack;

[0084] A battery management control module is connected to the semiconductor refrigeration chip and is used to control the semiconductor refrigeration chip.

[0085] Optionally, it also includes:

[0086] The sampling circuit is arranged between the battery management control module and the battery pack, and is used for sampling data of the battery pack, generating a sampling signal and outputting the sampling signal to the battery management control module.

[0087] Optionally, it also includes:

[0088] The insulation detection circuit is arranged between the metal shell and the battery management control module and is used for performing insulation detection.

[0089] Optionally, it also includes:

[0090] The charge and discharge control circuit is arranged between the battery management control module and the battery pack, and is used to control the charge and discharge of the battery pack.

[0091] Optionally, the cooling surface of the semiconductor cooling sheet is in contact with the battery pack, and the cooling surface of the semiconductor heating sheet is in contact with the metal shell.

[0092] For example, see Figure 5 , AC 220V is charged through the AC input interface 1, and the bidirectional inverter power module 2 converts the 220V voltage into 48V. At the same time, it can be charged by solar energy through the photovoltaic panel 6 and the MPPT (Maximum Power Point Tracking) module 7, and the energy storage DCDC (direct current) module 3 controls the charging and discharging. The BMS (battery management control) module sends the charging and discharging control signal flag according to the battery pack status. When the battery pack 5 has enough power to supply the load, the power generated by the photovoltaic panel 6 and the MPPT module 7 can be fed back to the power grid through the bidirectional inverter power module 2, thereby providing power.

[0093] The embodiment of the present invention has a metal shell with a receiving cavity inside; a battery pack is arranged in the receiving cavity; a semiconductor cooling sheet is arranged between the metal shell and the battery pack for cooling or heating the battery pack; and a battery management control module is connected to the semiconductor cooling sheet for controlling the semiconductor cooling sheet. Heating and cooling the battery pack by the semiconductor cooling sheet reduces the complexity and cost of the balcony photovoltaic temperature control system, improves the temperature control accuracy and efficiency of the balcony photovoltaic temperature control system, and thus enables the balcony photovoltaic system to be effectively powered and operated.

[0094] Reference Figure 6 , shows a flow chart of steps of an embodiment of a balcony photovoltaic temperature control method of the present invention, the balcony photovoltaic temperature control method is applied to a battery management control module, the semiconductor cooling sheet is connected, and the semiconductor cooling sheet is arranged between the metal shell and the battery pack. The structure of the battery management control module, the semiconductor cooling sheet, the metal shell and the battery pack can be specifically referred to the above embodiment, and the balcony photovoltaic temperature control method can specifically include the following steps:

[0095] Step 601, in response to a power-on instruction, performing a self-test and generating self-test result information;

[0096] When the balcony photovoltaic is powered on, the battery management control module can receive the power-on command. In response to the power-on command, the battery management control module and the parts connected to it can be self-tested, and the self-test result information is generated based on the results of the self-test. Among them, the self-test includes but is not limited to insulation detection, charging control, chip self-test, etc. Chip self-test includes disconnection detection, multiplexing detection, filter detection, gap detection, SC detection, etc.

[0097] The power-on instruction may be triggered by software or hardware, which is not specifically limited in the embodiment of the present invention.

[0098] Step 602, in response to the self-test result information indicating that the self-test is normal, detecting the cell voltage of the battery pack;

[0099] When the self-test result information is normal, it means that the internal part of the current battery management control module and all parts connected to it can work normally and control the battery cell. The battery cell voltage of each battery cell in the battery pack can be detected.

[0100] Step 603, performing self-balancing control according to the cell voltage;

[0101] Based on the cell voltage of each cell, the voltage of the cells in the battery pack is self-balanced to improve the energy utilization rate of the cells, extend the life of the cells, optimize the performance characteristics, and improve the safety of the cells. Self-balancing control can be passive balancing. For example, by collecting the voltage values ​​of 16 strings of cells in real time, identifying the highest and lowest voltage values, and calculating the voltage difference, when the voltage difference is greater than 200mV, the cell with the highest voltage is discharged so that its excess power is converted into heat consumption through resistance until the power of all battery cells tends to be consistent; if the voltage difference is less than 200mV, no processing is performed.

[0102] Step 604, detecting the temperature of the battery cells of the battery pack;

[0103] After the battery cell completes the self-balancing control, the temperature of the battery cell can be controlled. The temperature of the battery cell can be collected through a sampling circuit to obtain the battery cell temperature of each battery cell in the battery pack.

[0104] Step 605 , controlling the semiconductor refrigeration sheet to cool or heat the battery pack and the charge and discharge state of the battery pack according to the battery core temperature.

[0105] According to the different battery core temperatures, the current direction of the semiconductor cooling sheet is controlled to cool or heat the battery pack. At the same time, the charge and discharge status of the battery pack can also be set to protect the safety and charge and discharge efficiency of the battery pack.

[0106] For example, see Figure 7 After power is supplied, the initialization task is performed, followed by self-test tasks such as insulation detection, charging control, and chip self-test. After the self-test is completed, if there is no abnormality, the normal operation mode is performed, and the voltage, temperature, current collection and SOC estimation are performed. The voltage difference is calculated according to the voltage value of each battery cell for balanced control, and the temperature management is performed according to the temperature of the battery pack. The MCU sends the charge and discharge flag by judging whether the maximum and minimum values ​​of each parameter exceed the preset normal range. If the parameter is within the normal range, the charge and discharge control is performed according to the instruction. If the parameter exceeds the normal range, an alarm is issued and a timely response is made.

[0107] The embodiment of the present invention performs a self-test in response to a power-on instruction and generates self-test result information; in response to the self-test result information being normal, detects the cell voltage of the battery pack; performs self-balancing control according to the cell voltage; detects the cell temperature of the battery pack; controls the semiconductor cooling sheet to cool or heat the battery pack and the charge and discharge state of the battery pack according to the cell temperature. After the photovoltaic temperature control system is powered on, comprehensive self-test and balancing control of the photovoltaic is performed to ensure that each cell in the battery pack is in a normal operating state and in a temperature controllable state, thereby accurately controlling the temperature of the cell.

[0108] Reference Figure 8 , shows a flow chart of steps of an embodiment of a balcony photovoltaic temperature control method of the present invention, the balcony photovoltaic temperature control method is applied to a battery management control module, the semiconductor cooling sheet is connected, and the semiconductor cooling sheet is arranged between the metal shell and the battery pack. The structure of the battery management control module, the semiconductor cooling sheet, the metal shell and the battery pack can be specifically referred to the above embodiment, and the balcony photovoltaic temperature control method can specifically include the following steps:

[0109] Step 801, detecting the temperature of the battery cell of the battery pack;

[0110] In the embodiment of the present invention, the cell temperature of each cell in the battery pack may be detected, thereby controlling the temperature of the battery pack.

[0111] Step 802 , controlling the semiconductor refrigeration sheet to cool or heat the battery pack and the charge and discharge state of the battery pack according to the battery core temperature.

[0112] Based on the detected battery cell temperature, the current direction of the semiconductor cooling chip is controlled to cool or heat the battery pack so that the battery pack can be kept in an undamaged state. The charging and discharging state of the battery pack is also controlled to ensure the effective input and output of the battery pack and protect the battery pack.

[0113] In an optional embodiment of the present invention, the step of controlling the semiconductor refrigeration chip to cool or heat the battery pack and the charge and discharge state of the battery pack according to the battery cell temperature includes: when the battery cell temperature is not greater than the discharge low temperature protection threshold, controlling the semiconductor refrigeration chip to heat the battery pack, and setting the charge and discharge state to a charge and discharge prohibited state; when the battery cell temperature is greater than the discharge low temperature protection threshold and not greater than the charge low temperature protection threshold, controlling the semiconductor refrigeration chip to heat the battery pack, and setting the charge and discharge state to a discharge enabled charge prohibited state; when the battery cell temperature is greater than the charge low temperature protection threshold and not greater than the charge high temperature protection threshold, setting the charge and discharge state to a charge and discharge enabled state; when the battery cell temperature is greater than the charge high temperature protection threshold and not greater than the discharge high temperature protection threshold, setting the charge and discharge state to a discharge enabled charge prohibited state; when the battery cell temperature is greater than the discharge high temperature protection threshold, controlling the semiconductor refrigeration chip to cool the battery pack, and setting the charge and discharge state to a charge and discharge prohibited state.

[0114] In an embodiment of the present invention, the discharge low temperature protection threshold is the minimum temperature threshold when the battery cell can be discharged. The charge low temperature protection threshold is the minimum temperature threshold when the battery cell can be charged. The charge high temperature protection threshold is the maximum temperature threshold when the battery cell is charged. The discharge high temperature protection threshold is the maximum temperature threshold when the battery cell is discharged. The sizes of the discharge low temperature protection threshold, the charge low temperature protection threshold, the charge high temperature protection threshold, and the discharge high temperature protection threshold increase in sequence. The specific sizes of the discharge low temperature protection threshold, the charge low temperature protection threshold, the charge high temperature protection threshold, and the discharge high temperature protection threshold can be determined according to the performance of the battery itself. The embodiment of the present invention does not specifically limit the specific sizes of the discharge low temperature protection threshold, the charge low temperature protection threshold, the charge high temperature protection threshold, and the discharge high temperature protection threshold.

[0115] When the cell temperature is not greater than the discharge low temperature protection threshold, it means that the cell temperature in the battery pack is very low. The current direction of the semiconductor cooling sheet can be controlled to heat the battery pack, and the charge and discharge state can be set to the charge and discharge prohibition state. The charge and discharge prohibition state is a state in which the cells in the battery pack are prohibited from charging and discharging.

[0116] When the cell temperature is greater than the discharge low temperature protection threshold and not greater than the charge low temperature protection threshold, it means that the cell temperature in the battery pack is low and needs to be raised to improve its efficiency. The semiconductor cooling sheet can be controlled to heat the battery pack. And the charge and discharge state is set to the discharge enable charge prohibition state. The discharge enable charge prohibition state is a state in which the cells in the battery pack are allowed to discharge but the cells in the battery pack are prohibited from charging.

[0117] When the battery cell temperature is greater than the charging low temperature protection threshold and not greater than the charging high temperature protection threshold, that is, the current battery cell is in a normal operating condition, the charge and discharge state can be set to the charge and discharge enable state; the charge and discharge enable state allows the battery cells in the battery pack to discharge and charge.

[0118] When the cell temperature is greater than the charging high temperature protection threshold and not greater than the discharging high temperature protection threshold, that is, the current cell temperature is slightly high, in order to avoid overheating of the cells in the battery pack, the charge and discharge state is changed to the discharge enabled charging prohibited state to avoid the cell temperature in the battery pack from rising.

[0119] When the battery cell temperature is greater than the discharge high temperature protection threshold, it means that the battery cell temperature in the battery pack is too high. To avoid the occurrence of discharge due to excessive temperature, the semiconductor refrigeration sheet can be controlled to cool the battery pack and set the charge and discharge state to the charge and discharge prohibited state.

[0120] For example, see Fig. 9The system obtains the battery pack temperature parameters, compares them with the preset thresholds, and performs heating, cooling, charging, discharging and other operations on the battery pack according to the comparison results. In the example, the battery cell type is lithium iron phosphate, so its charging operating range is 0℃~45℃, the discharging operating range is -20℃~60℃, and the optimal operating temperature range is 15℃~35℃. When the temperature is less than or equal to the discharge low temperature protection threshold (-20℃), the system low temperature alarm is triggered, and the heating device is started to heat the battery pack. At the same time, the charge / discharge enable position is set to 0, and charging and discharging are prohibited; when the temperature is greater than the discharge low temperature protection threshold (-20℃) and less than or equal to the charge low temperature protection threshold (0℃), the system low temperature alarm is triggered, the heating device is started to heat the battery pack, the discharge enable position is set to 1, and self-heating during discharge is allowed, and the charge enable position is set to 0, and charging is prohibited; when the temperature is greater than the charge low temperature protection threshold (0℃) and less than or equal to the optimal temperature low threshold (15℃), the current temperature and the initial temperature difference are detected to see if they continue to decrease. If the temperature difference continues to decrease, the heating device is started to heat the battery pack, and the charge / discharge enable position is set to 1, and self-heating during charging and discharging is allowed; when the temperature is greater than When the optimal temperature low threshold (15°C) is less than or equal to the optimal temperature high threshold (35°C), the charge and discharge enable position is 1, and charging and discharging are allowed. When the temperature is greater than the optimal temperature high threshold (35°C) and less than or equal to the charging high temperature protection threshold (45°C), detect whether the difference between the current temperature and the initial temperature continues to rise. If the temperature difference continues to rise, start the refrigeration device to cool the battery pack, and the charge and discharge enable position is 1, allowing charging and discharging; when the temperature is greater than the charging high temperature protection threshold (45°C) and less than or equal to the discharging high temperature protection threshold (60°C), start the refrigeration device, the charge enable position is 0, charging is prohibited, and the discharge enable position is 1, allowing discharging; when the temperature is greater than the discharge high temperature protection threshold (60°C), start the refrigeration device, the charge / discharge enable position is 0, and charging and discharging are prohibited.

[0121] The embodiment of the present invention detects the battery cell temperature of the battery pack. When the battery cell temperature is not greater than the discharge low temperature protection threshold, the semiconductor refrigeration chip is controlled to heat the battery pack and set the charge and discharge state to the charge and discharge prohibited state; when the battery cell temperature is greater than the discharge low temperature protection threshold and not greater than the charge low temperature protection threshold, the semiconductor refrigeration chip is controlled to heat the battery pack and set the charge and discharge state to the discharge enable charge prohibited state; when the battery cell temperature is greater than the charge low temperature protection threshold and not greater than the charge high temperature protection threshold, the charge and discharge state is set to the charge and discharge enabled state; when the battery cell temperature is greater than the charge high temperature protection threshold and not greater than the discharge high temperature protection threshold, the discharge enable charge prohibited state; when the battery cell temperature is greater than the discharge high temperature protection threshold, the semiconductor refrigeration chip is controlled to cool the battery pack and set the charge and discharge state to the charge and discharge prohibited state. When the battery pack works within a suitable temperature range, its temperature change is predicted. When it is predicted that the battery pack temperature is about to exceed the high temperature protection threshold, a cooling process is performed. When the battery pack temperature is about to fall below the low temperature protection threshold, a heating process is performed to ensure that the battery does not exceed the temperature protection threshold range and improve the system working efficiency.

[0122] It should be noted that, for the sake of simplicity, the method embodiments are described as a series of action combinations, but those skilled in the art should be aware that the embodiments of the present invention are not limited by the order of the actions described, because according to the embodiments of the present invention, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present invention.

[0123] An embodiment of the present invention discloses an electronic device, including a processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein the computer program implements the steps of the balcony photovoltaic temperature control method as described above when executed by the processor.

[0124] The balcony photovoltaic temperature control method is applied to a battery management control module, the semiconductor refrigeration sheet is connected, and the semiconductor refrigeration sheet is arranged between a metal shell and a battery pack. The method comprises:

[0125] Detecting the temperature of the battery cells of the battery pack;

[0126] The semiconductor refrigeration sheet is controlled according to the battery core temperature to cool or heat the battery pack, as well as the charge and discharge state of the battery pack.

[0127] Optionally, the step of controlling the semiconductor refrigeration sheet to cool or heat the battery pack and the charge and discharge state of the battery pack according to the battery core temperature includes:

[0128] When the battery core temperature is not greater than the discharge low temperature protection threshold, controlling the semiconductor refrigeration sheet to heat the battery pack, and setting the charge and discharge state to a charge and discharge prohibited state;

[0129] When the battery cell temperature is greater than a discharge low temperature protection threshold and not greater than a charge low temperature protection threshold, controlling the semiconductor cooling sheet to heat the battery pack, and setting the charge and discharge state to a discharge-enabled charge-disabled state;

[0130] When the battery cell temperature is greater than a charging low temperature protection threshold and not greater than a charging high temperature protection threshold, setting the charging and discharging state to a charging and discharging enabled state;

[0131] When the battery cell temperature is greater than a charging high temperature protection threshold and not greater than a discharging high temperature protection threshold, setting the charging and discharging state to a discharging enabled charging prohibited state;

[0132] When the battery cell temperature is greater than a discharge high temperature protection threshold, the semiconductor refrigeration sheet is controlled to cool the battery pack, and the charge and discharge state is set to a charge and discharge prohibited state.

[0133] Optionally, the method further comprises:

[0134] In response to the power-on instruction, a self-test is performed and self-test result information is generated.

[0135] Optionally, the method further comprises:

[0136] In response to the self-test result information indicating that the self-test is normal, detecting the cell voltage of the battery pack;

[0137] Self-balancing control is performed according to the cell voltage.

[0138] The embodiment of the present invention detects the battery cell temperature of the battery pack. When the battery cell temperature is not greater than the discharge low temperature protection threshold, the semiconductor refrigeration chip is controlled to heat the battery pack and set the charge and discharge state to the charge and discharge prohibited state; when the battery cell temperature is greater than the discharge low temperature protection threshold and not greater than the charge low temperature protection threshold, the semiconductor refrigeration chip is controlled to heat the battery pack and set the charge and discharge state to the discharge enable charge prohibited state; when the battery cell temperature is greater than the charge low temperature protection threshold and not greater than the charge high temperature protection threshold, the charge and discharge state is set to the charge and discharge enabled state; when the battery cell temperature is greater than the charge high temperature protection threshold and not greater than the discharge high temperature protection threshold, the discharge enable charge prohibited state; when the battery cell temperature is greater than the discharge high temperature protection threshold, the semiconductor refrigeration chip is controlled to cool the battery pack and set the charge and discharge state to the charge and discharge prohibited state. When the battery pack works within a suitable temperature range, its temperature change is predicted. When it is predicted that the battery pack temperature is about to exceed the high temperature protection threshold, a cooling process is performed. When the battery pack temperature is about to fall below the low temperature protection threshold, a heating process is performed to ensure that the battery does not exceed the temperature protection threshold range and improve the system working efficiency.

[0139] The memory may include a random access memory (RAM) or a non-volatile memory, such as at least one disk memory. Optionally, the memory may also be at least one storage device located away from the processor.

[0140] The above-mentioned processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

[0141] An embodiment of the present invention discloses a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the balcony photovoltaic temperature control method described above are implemented.

[0142] The balcony photovoltaic temperature control method is applied to a battery management control module, the semiconductor refrigeration sheet is connected, and the semiconductor refrigeration sheet is arranged between a metal shell and a battery pack. The method comprises:

[0143] Detecting the battery cell temperature of the battery pack;

[0144] The semiconductor refrigeration sheet is controlled according to the battery core temperature to cool or heat the battery pack, as well as the charge and discharge state of the battery pack.

[0145] Optionally, the step of controlling the semiconductor refrigeration sheet to cool or heat the battery pack and the charge and discharge state of the battery pack according to the battery core temperature includes:

[0146] When the battery core temperature is not greater than the discharge low temperature protection threshold, controlling the semiconductor refrigeration sheet to heat the battery pack, and setting the charge and discharge state to a charge and discharge prohibited state;

[0147] When the battery cell temperature is greater than a discharge low temperature protection threshold and not greater than a charge low temperature protection threshold, controlling the semiconductor cooling sheet to heat the battery pack, and setting the charge and discharge state to a discharge-enabled charge-disabled state;

[0148] When the battery cell temperature is greater than a charging low temperature protection threshold and not greater than a charging high temperature protection threshold, setting the charging and discharging state to a charging and discharging enabled state;

[0149] When the battery cell temperature is greater than a charging high temperature protection threshold and not greater than a discharging high temperature protection threshold, setting the charging and discharging state to a discharging enabled charging prohibited state;

[0150] When the battery cell temperature is greater than a discharge high temperature protection threshold, the semiconductor refrigeration sheet is controlled to cool the battery pack, and the charge and discharge state is set to a charge and discharge prohibited state.

[0151] Optionally, the method further comprises:

[0152] In response to the power-on instruction, a self-test is performed and self-test result information is generated.

[0153] Optionally, the method further comprises:

[0154] In response to the self-test result information indicating that the self-test is normal, detecting the cell voltage of the battery pack;

[0155] Self-balancing control is performed according to the cell voltage.

[0156] The embodiment of the present invention detects the battery cell temperature of the battery pack. When the battery cell temperature is not greater than the discharge low temperature protection threshold, the semiconductor refrigeration chip is controlled to heat the battery pack and set the charge and discharge state to the charge and discharge prohibited state; when the battery cell temperature is greater than the discharge low temperature protection threshold and not greater than the charge low temperature protection threshold, the semiconductor refrigeration chip is controlled to heat the battery pack and set the charge and discharge state to the discharge enable charge prohibited state; when the battery cell temperature is greater than the charge low temperature protection threshold and not greater than the charge high temperature protection threshold, the charge and discharge state is set to the charge and discharge enabled state; when the battery cell temperature is greater than the charge high temperature protection threshold and not greater than the discharge high temperature protection threshold, the discharge enable charge prohibited state; when the battery cell temperature is greater than the discharge high temperature protection threshold, the semiconductor refrigeration chip is controlled to cool the battery pack and set the charge and discharge state to the charge and discharge prohibited state. When the battery pack works within a suitable temperature range, its temperature change is predicted. When it is predicted that the battery pack temperature is about to exceed the high temperature protection threshold, a cooling process is performed. When the battery pack temperature is about to fall below the low temperature protection threshold, a heating process is performed to ensure that the battery does not exceed the temperature protection threshold range and improve the system working efficiency.

[0157] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0158] It will be appreciated by those skilled in the art that the embodiments of the present invention may be provided as methods, devices, or computer program products. Therefore, the embodiments of the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the embodiments of the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0159] The embodiments of the present invention are described with reference to the flowcharts and / or block diagrams of the methods, terminal devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0160] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing terminal device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0161] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device so that a series of operating steps are executed on the computer or other programmable terminal device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable terminal device to implement the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0162] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0163] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0164] The above is a detailed introduction to a balcony photovoltaic temperature control system, method, and balcony photovoltaic system provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A balcony photovoltaic temperature control system, characterized in that: include: A metal shell with a receiving cavity inside; A battery pack is disposed in the accommodating cavity; A semiconductor cooling sheet is disposed between the metal housing and the battery pack and is used to cool or heat the battery pack; A battery management control module is connected to the semiconductor refrigeration chip and is used to control the semiconductor refrigeration chip.

2. The balcony photovoltaic temperature control system according to claim 1, characterized in that: Also includes: The sampling circuit is arranged between the battery management control module and the battery pack, and is used for sampling data of the battery pack, generating a sampling signal and outputting the sampling signal to the battery management control module.

3. The balcony photovoltaic temperature control system according to claim 1, characterized in that: Also includes: The insulation detection circuit is arranged between the metal shell and the battery management control module and is used for performing insulation detection.

4. The balcony photovoltaic temperature control system according to any one of claims 1 to 3, characterized in that: Also includes: The charge and discharge control circuit is arranged between the battery management control module and the battery pack, and is used to control the charge and discharge of the battery pack.

5. The balcony photovoltaic temperature control system according to claim 1, characterized in that: The cooling surface of the semiconductor cooling sheet contacts the battery pack, and the cooling surface of the semiconductor heating sheet contacts the metal shell.

6. A balcony photovoltaic temperature control method, characterized in that: Applied to a battery management control module, the semiconductor refrigeration sheet is connected, and the semiconductor refrigeration sheet is arranged between a metal shell and a battery pack. The method includes: Detecting the temperature of the battery cells of the battery pack; The semiconductor refrigeration sheet is controlled according to the battery core temperature to cool or heat the battery pack, as well as the charge and discharge state of the battery pack.

7. The balcony photovoltaic temperature control system according to claim 6, characterized in that: The step of controlling the semiconductor refrigeration sheet to cool or heat the battery pack and the charge and discharge state of the battery pack according to the battery core temperature includes: When the battery core temperature is not greater than the discharge low temperature protection threshold, controlling the semiconductor refrigeration sheet to heat the battery pack, and setting the charge and discharge state to a charge and discharge prohibited state; When the battery cell temperature is greater than a discharge low temperature protection threshold and not greater than a charge low temperature protection threshold, controlling the semiconductor cooling sheet to heat the battery pack, and setting the charge and discharge state to a discharge-enabled charge-disabled state; When the battery cell temperature is greater than a charging low temperature protection threshold and not greater than a charging high temperature protection threshold, setting the charging and discharging state to a charging and discharging enabled state; When the battery cell temperature is greater than a charging high temperature protection threshold and not greater than a discharging high temperature protection threshold, setting the charging and discharging state to a discharging enabled charging prohibited state; When the battery cell temperature is greater than a discharge high temperature protection threshold, the semiconductor refrigeration sheet is controlled to cool the battery pack, and the charge and discharge state is set to a charge and discharge prohibited state.

8. The balcony photovoltaic temperature control system according to claim 6, characterized in that: The method further comprises: In response to the power-on instruction, a self-test is performed and self-test result information is generated.

9. The balcony photovoltaic temperature control system according to claim 8, characterized in that: The method further comprises: In response to the self-test result information indicating that the self-test is normal, detecting the cell voltage of the battery pack; Self-balancing control is performed according to the cell voltage.

10. A balcony photovoltaic system, comprising a photovoltaic panel and a balcony photovoltaic temperature control system according to any one of claims 1 to 9.

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