High and low voltage isolated energy storage battery management system

Abstract

The invention provides a high-low voltage isolated energy storage battery management system, and relates to the technical field of battery management systems or other related fields, the system comprises a power supply isolation unit, a high voltage acquisition unit and a communication isolation unit, the power supply isolation unit is used for providing working voltage for the high voltage acquisition unit, and the communication isolation unit is used for providing communication voltage for the high voltage acquisition unit; the power supply isolation unit comprises a low-voltage power supply, a first transformer, a voltage conditioning circuit, a second transformer, a diode module and a voltage stabilizer, and the high-voltage acquisition unit is used for acquiring battery cluster information, converting a signal format of the battery cluster information into a digital signal and transmitting the battery cluster information to the communication isolation unit; the communication isolation unit is used for transmitting the battery cluster information to the micro-processing chip, the micro-processing chip generates a battery cluster control instruction based on the battery cluster information, and the communication isolation unit comprises a third transformer, a fourth transformer and a bridging chip. According to the invention, the technical problem that high-voltage and low-voltage isolation cannot be carried out on a high-voltage energy storage battery management system in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery management systems or other related fields, and in particular to a high- and low-voltage isolated energy storage battery management system. Background Art

[0002] The energy storage battery management system is an important part of the energy storage system. It monitors the parameters of the energy storage battery in real time, performs status detection, status prediction and status warning on the battery, etc. The energy storage battery management system monitors, manages and maintains the energy storage battery to ensure the reliable operation of the energy storage battery, extend the service life of the energy storage battery, and improve the efficiency and economic value of the energy storage battery. At present, the management voltage of the energy storage battery management system can only reach a maximum of 1500V. When the management voltage is increased to 2000V, the system cycle efficiency of the energy storage battery management system is improved. Therefore, from the perspective of the voltage cost and economic benefits of the energy storage system, compared with the 1500V energy storage battery management system, the 2000V to 2500V energy storage battery management system has better performance.

[0003] In the related art, when the management voltage of the energy storage battery management system is increased to 2000V to 2500V, the number of series components of the energy storage system increases, the use of DC cables connected to the inverter decreases, and the number of junction boxes is reduced accordingly. At the same time, the power density of electrical equipment such as junction boxes, inverters, and box transformers increases and the equipment volume decreases, and the workload of transportation and maintenance of electrical equipment is reduced accordingly, thereby reducing the overall cost of the energy storage system. As the voltage of the energy storage system increases, the energy storage battery management system, as the core equipment of the energy storage system, also needs to increase the total voltage of the collected battery pack. However, at present, it is impossible to isolate the high and low voltages of the high-voltage energy storage battery management system. The lack of a suitable high and low voltage isolation strategy will greatly limit the performance of the energy storage battery management system. Summary of the invention

[0004] The main purpose of the present invention is to provide a high-low voltage isolated energy storage battery management system to solve the technical problem in the related art that high-voltage energy storage battery management systems cannot be isolated from high and low voltages.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a high-low voltage isolated energy storage battery management system is provided, comprising: a power isolation unit, used to provide a target working voltage for a high-voltage acquisition unit, the power isolation unit comprising: a low-voltage power supply, a first transformer, a voltage conditioning circuit, a second transformer, a diode module and a voltage stabilizer, the first transformer couples the voltage to the voltage conditioning circuit after receiving the voltage generated by the low-voltage power supply, the second transformer is used to couple the output voltage of the voltage conditioning circuit to the diode module, the output voltage of the diode module is processed by the voltage stabilizer to obtain the target working voltage, wherein the first transformer is a primary isolation module of the power isolation unit, and the second transformer is a secondary isolation module of the power isolation unit; a high-voltage acquisition unit is used to collect battery cluster information , converting the signal format of the battery cluster information into a digital signal, and transmitting the battery cluster information in the form of a digital signal to a communication isolation unit; the communication isolation unit is used to transmit the battery cluster information in the form of a digital signal to a microprocessor chip, and the microprocessor chip generates a battery cluster control instruction based on the battery cluster information. The communication isolation unit includes: a third transformer, a fourth transformer and a bridge chip. The third transformer is used to couple the battery cluster information in the form of a digital signal to the fourth transformer, and the fourth transformer is used to couple the battery cluster information in the form of a digital signal to the bridge chip. The bridge chip is used to transmit the battery cluster information in the form of a digital signal to the microprocessor chip, wherein the third transformer is a primary isolation module of the communication isolation unit, and the fourth transformer is a secondary isolation module of the communication isolation unit.

[0006] Optionally, the power isolation unit is connected to the high-voltage acquisition unit, and the high-voltage acquisition unit is connected to the communication isolation unit, wherein, in the power isolation unit, the low-voltage power supply is connected to the first transformer, the first transformer is connected to the voltage conditioning circuit, the voltage conditioning circuit is connected to the second transformer, the second transformer is connected to the diode module, and the diode module is connected to the voltage regulator; the voltage regulator is connected to the high-voltage acquisition unit, and the high-voltage acquisition unit is connected to the third transformer in the communication isolation unit; in the communication isolation unit, the third transformer is connected to the fourth transformer, the fourth transformer is connected to the bridge chip, and the bridge chip is connected to the microprocessor chip.

[0007] Optionally, the creepage distances of the first transformer, the second transformer, the third transformer and the fourth transformer are all greater than or equal to a preset insulation threshold, the sum of the creepage distances of the first transformer and the second transformer is greater than or equal to the dual transformer target insulation threshold, and the sum of the creepage distances of the third transformer and the fourth transformer is greater than or equal to the dual transformer target insulation threshold.

[0008] Optionally, the power isolation unit also includes: a push-pull chip and a filtering element, wherein the push-pull chip is connected to the low-voltage power supply, the push-pull chip is used to receive the voltage generated by the low-voltage power supply, and control the energy conversion and transmission of the low-voltage power supply by alternately turning on the power switch tube inside the chip; the filtering element is used to filter the transmission voltage in the power isolation unit, wherein the filtering element includes: a filtering capacitor and a filtering inductor.

[0009] Optionally, the high-voltage acquisition unit is connected to the battery cluster, and the battery cluster information acquired by the high-voltage acquisition unit includes: total voltage, total current and total insulation value of the battery cluster.

[0010] Optionally, the communication isolation unit further includes: a microprocessor chip and a filter element, wherein the microprocessor chip is used to receive battery cluster information and generate battery cluster control instructions based on the battery cluster information, wherein the battery cluster control instructions include: battery cluster charging instructions and battery cluster discharging instructions.

[0011] Optionally, the third transformer and the fourth transformer each include three input pins and three output pins, wherein the first output pin of the third transformer is connected to the first input pin of the fourth transformer, and the third output pin of the third transformer is connected to the third input pin of the fourth transformer.

[0012] Optionally, when performing an isolation operation, the power isolation unit includes: a low-voltage power supply generates a voltage and transmits the voltage to a first transformer and a push-pull chip; the first transformer performs a primary isolation on the voltage and couples the voltage to a voltage conditioning circuit, wherein the voltage is a DC voltage signal; the voltage conditioning circuit conditions the voltage to a target input voltage of the second transformer and transmits the voltage to the second transformer; the second transformer performs a secondary isolation on the voltage and couples the voltage to a diode module, wherein the diode module includes at least two diode elements; the diode module rectifies the voltage to a target input voltage of a voltage regulator and transmits the voltage to the voltage regulator, and the voltage regulator converts the voltage into a target operating voltage of a high-voltage acquisition unit.

[0013] Optionally, the high voltage acquisition unit transmits the battery cluster information to the microprocessor in the form of daisy chain communication.

[0014] Optionally, when performing an isolation operation, the communication isolation unit includes: a third transformer receives the battery cluster information collected by the high-voltage acquisition unit, performs primary isolation on the battery cluster information, and transmits the battery cluster information to a fourth transformer; the fourth transformer performs secondary isolation on the battery cluster information, and transmits the battery cluster information to a bridge chip; the bridge chip converts the battery cluster information into a synchronous serial communication format, and transmits the battery cluster information to a microprocessor chip.

[0015] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to run any of the above-mentioned high and low voltage isolated energy storage battery management systems.

[0016] According to another aspect of an embodiment of the present invention, there is also provided an electronic device, comprising one or more processors and a memory, wherein the memory is used to store one or more programs, wherein when the one or more programs are executed by one or more processors, the one or more processors run any one of the above-mentioned high and low voltage isolated energy storage battery management systems.

[0017] According to another aspect of an embodiment of the present invention, a computer program product is provided, including a computer program, which runs any one of the above-mentioned high and low voltage isolated energy storage battery management systems when executed by a processor.

[0018] In the present invention, a high-low voltage isolated energy storage battery management system includes a power isolation unit, a high-voltage acquisition unit and a communication isolation unit. The power isolation unit is used to provide a target working voltage for the high-voltage acquisition unit. The power isolation unit includes: a low-voltage power supply, a first transformer, a voltage conditioning circuit, a second transformer, a diode module and a voltage stabilizer, wherein the first transformer is a primary isolation module of the power isolation unit, and the second transformer is a secondary isolation module of the power isolation unit. The high-voltage acquisition unit is used to collect battery cluster information, convert the signal format of the battery cluster information into a digital signal, and transmit the battery cluster information in the form of a digital signal to the communication isolation unit. The communication isolation unit is used to transmit the battery cluster information in the form of a digital signal to a microprocessor chip, and the microprocessor chip generates a battery cluster control instruction based on the battery cluster information. The communication isolation unit includes: a third transformer, a fourth transformer and a bridge chip, wherein the third transformer is a primary isolation module of the communication isolation unit, and the fourth transformer is a secondary isolation module of the communication isolation unit.

[0019] The high-low voltage isolated energy storage battery management system proposed in the present invention can solve the high-low voltage isolation problem of 2000V to 2500V energy storage battery management systems, improve the voltage level of the energy storage battery management system, and while ensuring the reliability of the energy storage battery management system, improve resource utilization efficiency and increase system capacity, thereby solving the technical problem in the related art that high-voltage energy storage battery management systems cannot be isolated from high and low voltages. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 is a schematic diagram of an optional high and low voltage isolated energy storage battery management system according to an embodiment of the present invention;

[0022] Figure 2 is a circuit diagram of an optional high and low voltage isolated energy storage battery management system according to an embodiment of the present invention;

[0023] Figure 3 It is a flowchart of power supply isolation in an energy storage battery management system with optional high and low voltage isolation according to an embodiment of the present invention;

[0024] Figure 4 The present invention is a flowchart of communication isolation in an energy storage battery management system with optional high and low voltage isolation according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. 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.

[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0027] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0028] Embodiment 1

[0029] A high-low voltage isolated energy storage battery management system provided in this embodiment includes multiple implementation units. Figure 1 is a schematic diagram of an optional high and low voltage isolated energy storage battery management system according to an embodiment of the present invention, such as Figure 1 As shown, the high-low voltage isolated energy storage battery management system may include: a power isolation unit 10 , a high voltage acquisition unit 11 , and a communication isolation unit 12 .

[0030] Among them, the power isolation unit 10 is used to provide a target working voltage for the high-voltage acquisition unit. The power isolation unit 10 includes: a low-voltage power supply, a first transformer, a voltage conditioning circuit, a second transformer, a diode module and a voltage regulator. After receiving the voltage generated by the low-voltage power supply, the first transformer couples the voltage to the voltage conditioning circuit. The second transformer is used to couple the output voltage of the voltage conditioning circuit to the diode module. The output voltage of the diode module is processed by the voltage regulator to obtain the target working voltage. Among them, the first transformer is a primary isolation module of the power isolation unit, and the second transformer is a secondary isolation module of the power isolation unit.

[0031] The high voltage collection unit 11 is used to collect battery cluster information, convert the signal format of the battery cluster information into a digital signal, and transmit the battery cluster information in the form of a digital signal to the communication isolation unit.

[0032] The communication isolation unit 12 is used to transmit the battery cluster information in the form of digital signals to the microprocessor chip, and the microprocessor chip generates a battery cluster control instruction based on the battery cluster information. The communication isolation unit 12 includes: a third transformer, a fourth transformer and a bridge chip. The third transformer is used to couple the battery cluster information in the form of digital signals to the fourth transformer, and the fourth transformer is used to couple the battery cluster information in the form of digital signals to the bridge chip. The bridge chip is used to transmit the battery cluster information in the form of digital signals to the microprocessor chip, wherein the third transformer is a primary isolation module of the communication isolation unit, and the fourth transformer is a secondary isolation module of the communication isolation unit.

[0033] In the power isolation unit 10 of the embodiment of the present invention, the low-voltage power supply can use "±5V" alternating current, and the low-voltage power supply is responsible for providing the voltage of the power isolation unit 10. The first transformer and the second transformer can use 1:2 turn ratio transformers, or 1:1 turn ratio transformers. It should be noted that the creepage distances of the first transformer and the second transformer must be greater than or equal to the preset insulation threshold, and the sum of the creepage distances of the first transformer and the second transformer must be greater than or equal to the dual transformer target insulation threshold. In the embodiment of the present invention, the first transformer is the primary isolation module of the power isolation unit 10, and the second transformer is the secondary isolation module of the power isolation unit 10. The voltage conditioning circuit is a signal processing circuit, which is mainly used to condition the voltage to the target input voltage of the second transformer. The voltage conditioning circuit conditions the voltage signal so that the lower-level module can perform data processing on the voltage. The diode module includes at least two diodes. A diode is an electronic device made of semiconductor material, having a positive pole and a negative pole. When a forward voltage is applied between the two poles of the diode, the diode is turned on, and the current can flow from the positive pole to the negative pole; when a negative voltage is applied between the two poles of the diode, the diode is cut off, and the current cannot flow from the positive pole to the negative pole. In this working mode, the diode can realize the rectification of the voltage and current signals, and adjust the voltage and current signals to suitable input signals for the lower-level modules. The voltage regulator can adopt a low voltage dropout regulator, which can reduce the input voltage and convert the voltage into the target working voltage of the high-voltage acquisition unit, thereby providing a stable working voltage for the high-voltage acquisition unit.

[0034] In an embodiment of the present invention, the high- and low-voltage isolated energy storage battery management system further includes a high-voltage acquisition unit 11, which is connected to the battery cluster and is used to collect battery cluster information. The collected battery cluster information is an analog signal. The high-voltage acquisition unit 11 converts the battery cluster information into a digital signal internally and transmits the battery cluster information in the form of a digital signal.

[0035] In the communication isolation unit 12 of the embodiment of the present invention, the third transformer and the fourth transformer can adopt a 1:2 turn ratio transformer or a 1:1 turn ratio transformer. The creepage distances of the third transformer and the fourth transformer must be greater than or equal to the preset insulation threshold, and the sum of the creepage distances of the third transformer and the fourth transformer must be greater than or equal to the dual transformer target insulation threshold. In the embodiment of the present invention, the third transformer is the primary isolation module of the communication isolation unit 12, and the fourth transformer is the secondary isolation module of the communication isolation unit 12. The bridge chip is an integrated circuit used to connect different communication protocols or interfaces. Its main function is to convert data into different transmission formats to ensure that data can be smoothly transmitted between different devices or systems.

[0036] In the embodiment of the present invention, dual transformer isolation is used in both the power supply circuit and the communication circuit between the high and low voltages of the energy storage battery management system. The dual transformer isolation in the power supply circuit is the primary isolation achieved by the first transformer and the secondary isolation achieved by the second transformer. The dual transformer isolation in the communication circuit is the primary isolation achieved by the third transformer and the secondary isolation achieved by the fourth transformer. By adopting the strategy of dual transformer isolation in both the power supply circuit and the communication circuit between the high and low voltages of the energy storage battery management system, the safety requirements of the 2000V to 2500V energy storage battery management system can be met, and the reliability and stability of the 2000V to 2500V energy storage battery management system are enhanced.

[0037] Optionally, the power isolation unit is connected to the high-voltage acquisition unit, and the high-voltage acquisition unit is connected to the communication isolation unit, wherein, in the power isolation unit, the low-voltage power supply is connected to the first transformer, the first transformer is connected to the voltage conditioning circuit, the voltage conditioning circuit is connected to the second transformer, the second transformer is connected to the diode module, and the diode module is connected to the voltage regulator; the voltage regulator is connected to the high-voltage acquisition unit, and the high-voltage acquisition unit is connected to the third transformer in the communication isolation unit; in the communication isolation unit, the third transformer is connected to the fourth transformer, the fourth transformer is connected to the bridge chip, and the bridge chip is connected to the microprocessor chip.

[0038] In an embodiment of the present invention, the power isolation unit is connected to the high-voltage acquisition unit, and the high-voltage acquisition unit is connected to the communication isolation unit. In the power isolation unit, the low-voltage power supply, the first transformer, the voltage conditioning circuit, the second transformer, the diode module and the voltage stabilizer are connected in sequence. In the communication isolation unit, the third transformer, the fourth transformer and the bridge chip are connected in sequence.

[0039] Optionally, the creepage distances of the first transformer, the second transformer, the third transformer and the fourth transformer are all greater than or equal to a preset insulation threshold, the sum of the creepage distances of the first transformer and the second transformer is greater than or equal to the dual transformer target insulation threshold, and the sum of the creepage distances of the third transformer and the fourth transformer is greater than or equal to the dual transformer target insulation threshold.

[0040] By adopting the high and low voltage isolation strategy in the energy storage battery management system, the external operation object can be protected from harm. When the external operation object is performing the task, it will contact the low voltage or the shell of the power equipment. The high and low voltage isolation strategy can ensure that the high voltage is not introduced to the low voltage or the shell of the power equipment, protecting the external operation object from contacting the high voltage, thereby protecting the external operation object from harm.

[0041] There is a preset insulation threshold of creepage distance between the high voltage and low voltage of the energy storage battery management system. The creepage distance between the high voltage and the low voltage is crucial to the safe operation of the energy storage battery management system. If the creepage distance is too small, it will cause breakdown between the high voltage winding and the low voltage winding, thereby causing damage to the equipment and even causing a safety accident. Therefore, the creepage distances of the first transformer, the second transformer, the third transformer and the fourth transformer must be greater than or equal to the preset insulation threshold. In an embodiment of the present invention, the preset insulation threshold is 18mm. At the same time, in order to ensure that the 2000V to 2500V energy storage battery management system can operate safely and stably, the sum of the creepage distances of the first transformer and the second transformer must be greater than or equal to the dual transformer target insulation threshold, and the sum of the creepage distances of the third transformer and the fourth transformer must be greater than or equal to the dual transformer target insulation threshold. In an embodiment of the present invention, the dual transformer target insulation threshold is 36mm. Based on the above standards, the first transformer, the second transformer, the third transformer and the fourth transformer in the embodiment of the present invention can adopt the transformer of "model ALTWR-HD04TF", the creepage distance of which is greater than or equal to 21mm, and the creepage distance of the dual transformer is greater than or equal to 42mm, which meets the creepage distance insulation standard of the 2000V to 2500V energy storage battery management system under high and low voltage.

[0042] Optionally, the power isolation unit 10 also includes: a push-pull chip and a filtering element, wherein the push-pull chip is connected to the low-voltage power supply, the push-pull chip is used to receive the voltage generated by the low-voltage power supply, and control the energy conversion and transmission of the low-voltage power supply by alternately turning on the power switch tube inside the chip; the filtering element is used to filter the transmission voltage in the power isolation unit, wherein the filtering element includes: a filtering capacitor and a filtering inductor.

[0043] In the embodiment of the present invention, the power isolation unit 10 further includes a push-pull chip and a filter element. A push-pull chip is a chip that can control a circuit to work in two directions. It controls the forward or reverse flow of current by controlling the power switch tube inside the chip, thereby controlling the conversion and transmission of power energy. In the embodiment of the present invention, the push-pull chip is powered by a low-voltage power supply. The filter element is used to filter the voltage. In the embodiment of the present invention, the filter element includes a filter capacitor and a filter inductor.

[0044] Optionally, the high-voltage acquisition unit 11 is connected to the battery cluster, and the battery cluster information acquired by the high-voltage acquisition unit 11 includes: the total voltage, total current and total insulation value of the battery cluster.

[0045] In the embodiment of the present invention, the battery cluster information includes: the total voltage, total current and total insulation value of the battery cluster. The total voltage of the battery cluster corresponding to the 2000V to 2500V energy storage battery management system is 2000V to 2500V. The high-voltage acquisition unit 11 collects the battery cluster information and converts the battery cluster information into a digital signal. The battery cluster information is transmitted to the microprocessor chip through the communication isolation unit 12, and the microprocessor chip issues instructions based on the received battery cluster information.

[0046] The embodiment of the present invention can evaluate the battery cluster based on the battery cluster information collected by the high-voltage acquisition unit 11, for example, by calculating the charge state of the battery cluster based on the total voltage and total current information of the battery cluster to evaluate the operating state of the battery cluster, and by calculating the health state value of the battery cluster based on the total voltage and total insulation value of the battery cluster to evaluate the current health level and life status of the battery cluster.

[0047] Optionally, the communication isolation unit 12 further includes: a microprocessor chip and a filter element, wherein the microprocessor chip is used to receive battery cluster information and generate battery cluster control instructions based on the battery cluster information, wherein the battery cluster control instructions include: battery cluster charging instructions and battery cluster discharging instructions.

[0048] In the embodiment of the present invention, the communication isolation unit 12 also includes a microprocessor chip and a filter element. The microprocessor chip is a control chip that receives battery cluster information and generates corresponding battery cluster control instructions based on information such as total voltage, total current and total insulation value in the battery cluster information, and sends them to the lower-level module to implement corresponding control. For example, the microprocessor chip determines whether the discharge current or charging current of the current battery cluster is too large or too small based on the total current information of the battery cluster, and then sends a charging instruction or a discharging instruction to adjust the charge and discharge current of the battery cluster.

[0049] Optionally, the third transformer and the fourth transformer each include three input pins and three output pins, wherein the first output pin of the third transformer is connected to the first input pin of the fourth transformer, and the third output pin of the third transformer is connected to the third input pin of the fourth transformer.

[0050] In the embodiment of the present invention, it should be noted that the third transformer is directly connected to the fourth transformer, and the third transformer and the fourth transformer each include three input pins and three output pins, wherein the first output pin of the third transformer is connected to the first input pin of the fourth transformer, and the third output pin of the third transformer is connected to the third input pin of the fourth transformer.

[0051] Figure 2 is a circuit diagram of an optional high and low voltage isolated energy storage battery management system according to an embodiment of the present invention, such as Figure 2As shown, in the power isolation unit 10, "VCC+5V" is a low voltage power supply, "L1" is a filter capacitor, and "C1", "C2", "C3" and "C4" are all filter capacitors.

[0052] It should be noted that Figure 2 "U2" in the figure is a push-pull chip, which has 5 pins, of which pins 1 and 3 are output pins, and their symbols are "D1" and "D2" respectively, pin 2 is the power pin, and its symbol is "VCC", and pins 4 and 5 are ground pins, and their symbol is "GND".

[0053] It should be noted that Figure 2 "T1" is the first transformer, which has 6 pins, among which pin 1 is connected to pin 3 of the push-pull chip, pin 2 is connected to the low-voltage power supply and pin 2 of the push-pull chip, pin 3 is connected to pin 1 of the push-pull chip, and pins 4, 5, and 6 are connected to the voltage conditioning circuit.

[0054] It should be noted that Figure 2 "T2" is the second transformer, and the second transformer has 6 pins, among which pins 1, 2, and 3 are connected to the voltage conditioning circuit, pins 4 and 6 are connected to the diode module, and pin 5 is left empty.

[0055] It should be noted that Figure 2 “D1”, “D2”, “D3” and “D4” are all diodes. In the embodiment of the present invention, these four diodes constitute a diode module.

[0056] It should be noted that Figure 2 In the figure, "U1" is a voltage regulator. The voltage regulator has 5 pins. Pin 1 is the input terminal, and its symbol is "IN". Pin 2 is the enable terminal, and its symbol is "EN". Pin 3 is the ground terminal, and its symbol is "GND". Pin 4 is vacant, and its symbol is "FB / NC". Pin 5 is the output terminal, and its symbol is "OUT".

[0057] It should be noted that Figure 2 "HV_VDD5" is the power supply, which supplies power to the high-voltage acquisition module. "HV_BAT-" is the negative electrode of the battery cluster and also the reference ground terminal of the high-voltage acquisition module.

[0058] It should be noted that the “double transformer isolation” in the power isolation unit 10 mentioned in this embodiment refers to the double isolation of the first transformer “ T1 ” and the second transformer “ T2 ”.

[0059] It should be noted that the “high voltage acquisition module” corresponds to the high voltage acquisition unit 11 in the embodiment of the present invention.

[0060] It should be noted that in the communication isolation unit 12, "T3" is the third transformer, and the third transformer has 6 pins, of which pins 4 and 6 are connected to the high-voltage acquisition module, pin 5 is connected to the negative pole of the battery cluster, pins 1 and 3 are connected to the fourth transformer, and pin 2 is vacant.

[0061] It should be noted that “T4” is a fourth transformer, and the fourth transformer has 6 pins, wherein pins 4 and 6 are connected to pins 3 and 1 of the third transformer respectively, and pin 2 is grounded.

[0062] It should be noted that the “MCU” mentioned in the embodiment of the present invention is a microprocessing unit, “C5” and “C6” are filter capacitors, and “SPI” represents daisy chain communication.

[0063] The “double transformer isolation” in the communication isolation unit 12 refers to the double isolation of the third transformer “T3” and the fourth transformer “T4”.

[0064] In the embodiment of the present invention, the low-voltage power supply "VCC+5V" is isolated by the dual transformers of "T1" and "T2", and the voltage is output by the "U1" voltage regulator to power the high-voltage acquisition module; the high-voltage acquisition module collects the battery cluster information such as the total voltage, total current, and total insulation value of the battery cluster, and converts the battery cluster information into a digital signal, and then the battery cluster information is transmitted to the bridge chip in the form of daisy chain communication after being isolated by the dual transformers of "T3" and "T4", and finally the bridge chip converts the battery cluster information into a synchronous serial communication format, and transmits the battery cluster information to the microprocessor chip, which issues instructions.

[0065] Optionally, when performing an isolation operation, the power isolation unit includes: a low-voltage power supply generates a voltage and transmits the voltage to a first transformer and a push-pull chip; the first transformer performs a primary isolation on the voltage and couples the voltage to a voltage conditioning circuit, wherein the voltage is a DC voltage signal; the voltage conditioning circuit conditions the voltage to a target input voltage of the second transformer and transmits the voltage to the second transformer; the second transformer performs a secondary isolation on the voltage and couples the voltage to a diode module, wherein the diode module includes at least two diode elements; the diode module rectifies the voltage to a target input voltage of a voltage regulator and transmits the voltage to the voltage regulator, and the voltage regulator converts the voltage into a target operating voltage of a high-voltage acquisition unit.

[0066] In the embodiment of the present invention, when the power isolation unit 10 performs the isolation operation, the low-voltage power supply "VCC+5V" supplies power to the "U2" push-pull chip and the "T1" first transformer. The "T1" first transformer is the primary isolation of the power isolation unit 10. The voltage generated by the low-voltage power supply "VCC+5V" passes through the "T1" first transformer, and is coupled to the voltage conditioning circuit by the first transformer. The voltage conditioning circuit conditions the voltage and adjusts the voltage to a suitable input voltage for the second transformer, that is, the voltage is adjusted to the target input voltage of the second transformer. After being conditioned by the voltage conditioning circuit, the voltage is transmitted to the "T2" second transformer. The "T2" second transformer is the secondary isolation of the power isolation unit 10. The second transformer couples the voltage to the diode module, and after rectification by the "D1", "D2", "D3", and "D4" diodes, the voltage is rectified to a suitable input voltage for the voltage regulator, that is, the voltage is rectified to the target input voltage of the voltage regulator. The voltage is transmitted to the "U1" voltage regulator, and finally the "U1" voltage regulator converts the voltage into the target operating voltage of the high-voltage acquisition unit to power the high-voltage acquisition unit.

[0067] Optionally, the high voltage acquisition unit transmits the battery cluster information to the microprocessor in the form of daisy chain communication.

[0068] In the embodiment of the present invention, the high voltage acquisition unit 11 acquires battery cluster information, and the acquired battery cluster information is an analog signal. The high voltage acquisition unit 11 converts the battery cluster information into a digital signal internally, and transmits the battery cluster information to the microprocessor chip in the form of daisy chain communication.

[0069] Daisy chain communication is a serial connection communication, which connects multiple devices together in sequence to form a chain structure, and each device transmits data with the adjacent device, and the data is transmitted from the previous device to the next device until the data is transmitted to the last device. In the embodiment of the present invention, the third transformer "T3", the fourth transformer "T4", the bridge chip and the microprocessor chip "MCU" constitute a chain structure of daisy chain communication, and the battery cluster information is sequentially transmitted to the third transformer "T3", the fourth transformer "T4", the bridge chip, and finally to the microprocessor chip "MCU", completing the daisy chain communication process.

[0070] Optionally, when performing an isolation operation, the communication isolation unit includes: a third transformer receives the battery cluster information collected by the high-voltage acquisition unit, performs primary isolation on the battery cluster information, and transmits the battery cluster information to a fourth transformer; the fourth transformer performs secondary isolation on the battery cluster information, and transmits the battery cluster information to a bridge chip; the bridge chip converts the battery cluster information into a synchronous serial communication format, and transmits the battery cluster information to a microprocessor chip.

[0071] In the embodiment of the present invention, the third transformer "T3" is connected to the fourth transformer "T4", and the first output pin of the third transformer "T3" (corresponding to Figure 2 1 pin in the figure) and the first input pin of the fourth transformer "T4" (corresponding to Figure 2 6 pins) connected to the third output pin of the third transformer "T3" (corresponding to Figure 2 3 pin in the figure) and the third input pin of the fourth transformer "T4" (corresponding to Figure 2 4-pin) connection.

[0072] When the communication isolation unit 12 is performing the isolation operation, the third transformer "T3" realizes the primary isolation of the communication isolation unit 12, and the 4 and 6 pins of the third transformer "T3" receive the battery cluster information in the form of digital signals output by the high-voltage acquisition unit 11, and couple the battery cluster information to the 3 and 1 pins. The battery cluster information is transmitted from the 3 and 1 pins of the third transformer "T3" to the 4 and 6 pins of the "T4" transformer. The fourth transformer "T4" realizes the secondary isolation of the communication isolation unit 12, and the 4 and 6 pins of the fourth transformer "T4" receive the battery cluster signal and couple the battery cluster signal to the 3 and 1 pins. The battery cluster information is transmitted from the 3 and 1 pins of the fourth transformer "T4" to the bridge chip, and the bridge chip converts the format of the battery cluster information into a synchronous serial communication format, that is, Figure 2 The "SPI" format in the battery cluster is transmitted to the microprocessor chip in a synchronous serial communication format, and the microprocessor chip issues instructions.

[0073] It should be noted that by converting the battery cluster information into a synchronous serial communication format, the transmission efficiency of the battery cluster information can be improved, and the synchronous serial communication protocol is relatively simple and easy to implement and maintain.

[0074] It should be noted that the bridge chip in the embodiment of the present invention is a chip configured with a daisy chain communication protocol. In the embodiment of the present invention, the bridge chip is configured with a daisy chain communication protocol, thereby enabling daisy chain communication of battery cluster information. By adopting daisy chain communication, the embodiment of the present invention can improve the transmission efficiency of battery cluster information and enhance the anti-interference ability and reliability of the energy storage battery management system.

[0075] In an embodiment of the present invention, a high-low voltage isolated energy storage battery management system includes: a power isolation unit 10, a high-voltage acquisition unit 11, and a communication isolation unit 12. The power isolation unit 10 is used to provide a target working voltage for the high-voltage acquisition unit. The power isolation unit 10 includes: a low-voltage power supply, a first transformer, a voltage conditioning circuit, a second transformer, a diode module, and a voltage stabilizer, wherein the first transformer is a primary isolation module of the power isolation unit, and the second transformer is a secondary isolation module of the power isolation unit. The high-voltage acquisition unit 11 is used to collect battery cluster information, convert the signal format of the battery cluster information into a digital signal, and transmit the battery cluster information in the form of a digital signal to the communication isolation unit. The communication isolation unit 12 is used to transmit the battery cluster information in the form of a digital signal to a microprocessor chip, and the microprocessor chip generates a battery cluster control instruction based on the battery cluster information. The communication isolation unit 12 includes: a third transformer, a fourth transformer, and a bridge chip, wherein the third transformer is a primary isolation module of the communication isolation unit, and the fourth transformer is a secondary isolation module of the communication isolation unit.

[0076] The high-low voltage isolated energy storage battery management system proposed in the embodiment of the present invention is the industry's first high-low voltage isolated 2000V to 2500V energy storage battery management system, which can solve the high-low voltage isolation problem of the 2000V to 2500V energy storage battery management system, improve the voltage level of the energy storage battery management system, and while ensuring the reliability of the energy storage battery management system, improve resource utilization efficiency and increase system capacity, thereby solving the technical problem in the related art that high-voltage energy storage battery management systems cannot be isolated from high and low voltages.

[0077] Embodiment 2

[0078] According to an embodiment of the present invention, an embodiment of power isolation and communication isolation of a high-low voltage isolated energy storage battery management system is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0079] Figure 3 FIG. 1 is a flow chart of power supply isolation in an energy storage battery management system according to an optional high and low voltage isolation according to an embodiment of the present invention. Figure 3 As shown, the steps of power isolation in the high and low voltage isolated energy storage battery management system include:

[0080] In step 301, a low voltage power source generates a voltage and transmits the voltage to a first transformer and a push-pull chip.

[0081] Step 302: The first transformer performs primary isolation on the voltage and couples the voltage to a voltage conditioning circuit, wherein the voltage is a DC voltage signal.

[0082] In step 303, the voltage conditioning circuit conditions the voltage to a target input voltage of the second transformer, and transmits the voltage to the second transformer.

[0083] Step 304: The second transformer performs secondary isolation on the voltage and couples the voltage to the diode module, wherein the diode module includes at least two diode elements.

[0084] Step 305: The diode module rectifies the voltage into a target input voltage of the voltage regulator and transmits the voltage to the voltage regulator. The voltage regulator converts the voltage into a target operating voltage of the high voltage acquisition unit.

[0085] In the power isolation unit, the low-voltage power supply generates voltage and transmits the voltage to the first transformer and the push-pull chip. The first transformer implements primary isolation of the voltage and couples the voltage to the voltage conditioning circuit. The voltage conditioning circuit adjusts the voltage to the target input voltage of the second transformer and transmits the voltage to the second transformer. The second transformer implements secondary isolation of the voltage and couples the voltage to the diode module. The diode module rectifies the voltage to the target input voltage of the voltage regulator and transmits the voltage to the voltage regulator. Finally, the voltage regulator converts the voltage into the target operating voltage of the high-voltage acquisition unit, providing a stable operating voltage for the high-voltage acquisition unit, which collects battery cluster information.

[0086] Figure 4 FIG. 1 is a flow chart of communication isolation in an energy storage battery management system according to an optional high and low voltage isolation according to an embodiment of the present invention. Figure 4 As shown, the steps of communication isolation in the high and low voltage isolated energy storage battery management system include:

[0087] Step 401: The third transformer receives the battery cluster information collected by the high voltage collection unit, performs primary isolation on the battery cluster information, and transmits the battery cluster information to the fourth transformer.

[0088] Step 402: The fourth transformer performs secondary isolation on the battery cluster information and transmits the battery cluster information to the bridge chip.

[0089] Step 403: The bridge chip converts the battery cluster information into a synchronous serial communication format and transmits the battery cluster information to the microprocessor chip.

[0090] In the communication isolation unit 12, the high-voltage acquisition unit transmits the battery cluster information to the microprocessor chip in the form of daisy chain communication. The third transformer receives the battery cluster information output by the high-voltage acquisition unit, realizes the primary isolation of the battery cluster information, and transmits the battery cluster information to the fourth transformer. The fourth transformer realizes the secondary isolation of the battery cluster information and transmits the battery cluster information to the bridge chip. The bridge chip converts the battery cluster information into a synchronous serial communication format and transmits the battery cluster information to the microprocessor chip, and finally the microprocessor chip issues instructions.

[0091] From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: the high-low voltage isolated energy storage battery management system is the industry's first high-low voltage isolated 2000V to 2500V energy storage battery management system, which can solve the high-low voltage isolation problem of the 2000V to 2500V energy storage battery management system, improve the voltage level of the energy storage battery management system, and while ensuring the reliability of the energy storage battery management system, improve resource utilization efficiency and increase system capacity, thereby solving the technical problem in the related art that the high-voltage energy storage battery management system cannot be isolated from the high-low voltage.

[0092] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is further provided, the computer-readable storage medium including a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to perform the steps of power isolation and communication isolation of the high and low voltage isolated energy storage battery management system in any one of the above-mentioned embodiments 2.

[0093] According to another aspect of an embodiment of the present invention, there is further provided an electronic device, comprising one or more processors and a memory, wherein the memory is used to store one or more programs, wherein when the one or more programs are executed by one or more processors, the one or more processors implement the steps of power isolation and communication isolation of the high and low voltage isolated energy storage battery management system of any one of the above-mentioned embodiments 2.

[0094] The present application also provides a computer program product, including a computer program, which, when executed by a processor, implements the steps of power supply isolation and communication isolation of the high and low voltage isolated energy storage battery management system described in each embodiment of the present application.

[0095] The present application also provides a computer program product, including a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of power isolation and communication isolation of the high and low voltage isolated energy storage battery management system described in each embodiment of the present application are implemented.

[0096] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0097] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0098] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0099] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high and low voltage isolated energy storage battery management system, characterized in that: include: A power isolation unit, used to provide a target working voltage for the high-voltage acquisition unit, the power isolation unit comprising: a low-voltage power supply, a first transformer, a voltage conditioning circuit, a second transformer, a diode module and a voltage stabilizer, the first transformer couples the voltage generated by the low-voltage power supply to the voltage conditioning circuit after receiving the voltage, the second transformer is used to couple the output voltage of the voltage conditioning circuit to the diode module, the output voltage of the diode module is processed by the voltage stabilizer to obtain the target working voltage, wherein the first transformer is a primary isolation module of the power isolation unit, and the second transformer is a secondary isolation module of the power isolation unit; The high-voltage acquisition unit is used to collect battery cluster information, convert the signal format of the battery cluster information into a digital signal, and transmit the battery cluster information in the form of a digital signal to the communication isolation unit; The communication isolation unit is used to transmit the battery cluster information in the form of digital signals to a microprocessor chip, and the microprocessor chip generates a battery cluster control instruction based on the battery cluster information. The communication isolation unit includes: a third transformer, a fourth transformer and a bridge chip. The third transformer is used to couple the battery cluster information in the form of digital signals to the fourth transformer, and the fourth transformer is used to couple the battery cluster information in the form of digital signals to the bridge chip. The bridge chip is used to transmit the battery cluster information in the form of digital signals to the microprocessor chip, wherein the third transformer is a primary isolation module of the communication isolation unit, and the fourth transformer is a secondary isolation module of the communication isolation unit.

2. The energy storage battery management system according to claim 1, characterized in that: The power isolation unit is connected to the high voltage acquisition unit, and the high voltage acquisition unit is connected to the communication isolation unit, wherein: In the power isolation unit, the low-voltage power supply is connected to the first transformer, the first transformer is connected to the voltage conditioning circuit, the voltage conditioning circuit is connected to the second transformer, the second transformer is connected to the diode module, and the diode module is connected to the voltage regulator; The voltage stabilizer is connected to the high voltage acquisition unit, and the high voltage acquisition unit is connected to the third transformer in the communication isolation unit; In the communication isolation unit, the third transformer is connected to the fourth transformer, the fourth transformer is connected to the bridge chip, and the bridge chip is connected to the microprocessor chip.

3. The energy storage battery management system according to claim 1, characterized in that: The creepage distances of the first transformer, the second transformer, the third transformer and the fourth transformer are all greater than or equal to a preset insulation threshold, the sum of the creepage distances of the first transformer and the second transformer is greater than or equal to a dual-transformer target insulation threshold, and the sum of the creepage distances of the third transformer and the fourth transformer is greater than or equal to the dual-transformer target insulation threshold.

4. The energy storage battery management system according to claim 1, characterized in that: The power isolation unit further includes: a push-pull chip and a filter element, wherein: The push-pull chip is connected to the low-voltage power supply, and is used to receive the voltage generated by the low-voltage power supply, and control the energy conversion and transmission of the low-voltage power supply by alternately turning on the power switch tube inside the chip; The filtering element is used to filter the transmission voltage in the power isolation unit, wherein the filtering element includes: a filtering capacitor and a filtering inductor.

5. The energy storage battery management system according to claim 1, characterized in that: The high voltage acquisition unit is connected to the battery cluster, and the battery cluster information acquired by the high voltage acquisition unit includes: the total voltage, total current and total insulation value of the battery cluster.

6. The energy storage battery management system according to claim 1, characterized in that: The communication isolation unit further includes: the microprocessor chip and a filter element. The microprocessor chip is used to receive the battery cluster information and generate the battery cluster control instructions based on the battery cluster information. The battery cluster control instructions include: charging instructions for the battery cluster and discharging instructions for the battery cluster.

7. The energy storage battery management system according to claim 1, characterized in that: The third transformer and the fourth transformer each include three input pins and three output pins, wherein the first output pin of the third transformer is connected to the first input pin of the fourth transformer, and the third output pin of the third transformer is connected to the third input pin of the fourth transformer.

8. The energy storage battery management system according to any one of claims 1 to 7, characterized in that: When performing an isolation operation, the power isolation unit includes: The low voltage power supply generates the voltage and transmits the voltage to the first transformer and the push-pull chip; The first transformer performs primary isolation on the voltage and couples the voltage to the voltage conditioning circuit, wherein the voltage is a DC voltage signal; The voltage conditioning circuit conditions the voltage to a target input voltage of the second transformer and transmits the voltage to the second transformer; The second transformer performs secondary isolation on the voltage and couples the voltage to the diode module, wherein the diode module includes at least two diode elements; The diode module rectifies the voltage into a target input voltage of the voltage regulator and transmits the voltage to the voltage regulator, and the voltage regulator converts the voltage into a target operating voltage of the high-voltage acquisition unit.

9. The energy storage battery management system according to any one of claims 1 to 7, characterized in that: The high voltage acquisition unit transmits the battery cluster information to the microprocessor chip in the form of daisy chain communication.

10. The energy storage battery management system according to any one of claims 1 to 7, characterized in that: When performing the isolation operation, the communication isolation unit includes: The third transformer receives the battery cluster information collected by the high-voltage collection unit, performs primary isolation on the battery cluster information, and transmits the battery cluster information to the fourth transformer; The fourth transformer performs secondary isolation on the battery cluster information and transmits the battery cluster information to the bridge chip; The bridge chip converts the battery cluster information into a synchronous serial communication format and transmits the battery cluster information to the microprocessor chip.

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