Communication system for energy storage battery and communication method therefor, and vehicle

Abstract

A communication system for an energy storage battery and a communication method therefor, and a vehicle. The energy storage battery comprises a battery cluster. The battery cluster comprises a plurality of battery packs connected in series between a positive electrode end and a negative electrode end of the battery cluster. A power line is connected between two adjacent battery packs. A power line is connected between a positive electrode of the first battery pack and the positive electrode end of the battery cluster. A power line is connected between a negative electrode of the last battery pack and the negative electrode end of the battery cluster. The communication system for the energy storage battery comprises: a plurality of control modules, wherein the plurality of control modules comprise a master control module and slave control modules in one-to-one correspondence with the battery packs. Any one of the control modules is arranged on any one of the power lines. The master control module and any one of the slave control modules use carrier signals to perform information exchange by means of power lines.

Description

Communication system of energy storage battery and communication method thereof, and vehicle

[0001] Related applications

[0002] The present application claims priority to the Chinese patent application No. 202411103589.8, filed on August 13, 2024, and entitled "Communication system of energy storage battery and communication method thereof, and vehicle", the contents of which are hereby incorporated by reference in their entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of battery management system, and in particular to a communication system of energy storage battery and a communication method thereof, and a vehicle. BACKGROUND

[0004] The battery management system is used for managing the state and performance of the battery, and needs to monitor the state of the battery in real time to diagnose and respond to the state of the battery. Therefore, the communication system between the battery management system and the battery is particularly important.

[0005] The current communication between the master control module and the slave control module of the energy storage battery mainly adopts two wired communication modes of CAN and daisy chain, or adopts a radio frequency wireless communication mode such as Bluetooth, but the reliability of the above communication modes is low. SUMMARY

[0006] According to various embodiments of the present application, a communication system of energy storage battery and a communication method thereof, and a vehicle are provided.

[0007] According to an aspect of the present application, a communication system of energy storage battery is provided, the energy storage battery comprising a battery cluster;

[0008] The battery cluster comprises a plurality of battery packs connected in series between the positive and negative terminals of the battery cluster, and each adjacent two battery packs are connected by a power line, the positive terminal of the first battery pack and the positive terminal of the battery cluster are connected by a power line, and the negative terminal of the last battery pack and the negative terminal of the battery cluster are connected by a power line.

[0009] The communication system of the energy storage battery comprises a plurality of control modules, and the plurality of control modules comprise a master control module and a plurality of slave control modules corresponding to the battery packs one by one.

[0010] Any one of the control modules is arranged on any one of the power lines.

[0011] The master control module and any one of the slave control modules exchange information by using a carrier signal through the power line.

[0012] Optionally, the master control module is connected with the power line connected with the positive terminal of the battery cluster, and for any slave control module, the slave control module is connected with the power line connected with the negative terminal of the battery pack corresponding to the slave control module; or, the master control module is connected with the power line connected with the negative terminal of the battery cluster, and for any slave control module, the slave control module is connected with the power line connected with the positive terminal of the battery pack corresponding to the slave control module.

[0013] Optionally, the control module comprises a control unit, a modulation and demodulation unit and an information coupling unit.

[0014] The modulation and demodulation unit is connected with the control unit and the information coupling unit respectively, and is used for modulating the signal output by the control unit into a carrier signal, and is also used for demodulating the carrier signal received by the information coupling unit and transmitting to the control unit.

[0015] The information coupling unit is also connected with the power line connected with the control module to which the information coupling unit belongs, and is used for receiving the carrier signal on the power line, and is also used for transmitting the carrier signal generated by the modulation and demodulation unit to the power line.

[0016] Optionally, the modulation and demodulation unit comprises a modulation circuit and a demodulation circuit.

[0017] The input end of the modulation circuit is connected with the control unit, and the output end of the modulation circuit is connected with the information coupling unit, and the modulation circuit is used for modulating the signal output by the control unit into the carrier signal.

[0018] The input end of the demodulation circuit is connected with the information coupling unit, and the output end of the demodulation circuit is connected with the control unit, and the demodulation circuit is used for demodulating the carrier signal received by the information coupling unit.

[0019] Optionally, the information coupling unit comprises a coil and a magnetic ring, the input end of the coil is connected with the modulation and demodulation unit, and the coil is wound on the magnetic ring.

[0020] The magnetic ring is sleeved on the power line connected with the control module.

[0021] Optionally, the control unit of the master control module comprises a microcontroller.

[0022] The control unit of the slave control module comprises an analog front-end chip.

[0023] According to another aspect of the present application, a communication method of a communication system of an energy storage battery is provided, which is applied to the communication system of the energy storage battery.

[0024] The communication method of the communication system of the energy storage battery comprises:

[0025] The master module converts the battery pack information acquisition instruction into a first carrier signal, and transmits the first carrier signal to a power line connected with the master module;

[0026] The slave module converts the first carrier signal into the battery pack information acquisition instruction, acquires the basic information of the battery pack according to the battery pack information acquisition instruction, converts the basic information of the battery pack into a second carrier signal, and transmits the second carrier signal to a power line connected with the slave module;

[0027] The master module converts the second carrier signal into the basic information of the battery pack.

[0028] Optionally, before the master module converts the battery pack information acquisition instruction into the first carrier signal, the method further comprises:

[0029] Acquiring address information of each slave module, and the address information of different slave modules is different;

[0030] The address information of the slave module to be executed is included in the first carrier signal.

[0031] Optionally, the basic information of the battery pack comprises at least one of voltage and temperature of the battery pack.

[0032] According to another aspect of the present application, a vehicle is provided, comprising an energy storage battery and the communication system of the energy storage battery.

[0033] Details of one or more embodiments of the present application are presented in the following drawings and description, so that other features, objects and advantages of the present application are more apparent. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0035] FIG. 1 is a structural schematic diagram of a communication system of an energy storage battery according to an embodiment of the present application;

[0036] FIG. 2 is a flow chart of a communication method of a communication system of an energy storage battery according to an embodiment of the present application. DETAILED DESCRIPTION

[0037] In order to make the technical personnel in the art better understand the scheme of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should be within the scope of protection of the present application.

[0038] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0039] FIG. 1 is a structural schematic diagram of a communication system of an energy storage battery according to an embodiment of the present application. Referring to FIG. 1, the energy storage battery includes a battery cluster;

[0040] The battery cluster includes a plurality of battery packs 10 connected in series between a positive terminal B+ and a negative terminal B- of the battery cluster. Two adjacent battery packs 10 are connected by a power line 11. The positive terminal of the first battery pack 10 and the positive terminal B+ of the battery cluster are connected by a power line 11. The negative terminal of the last battery pack 10 and the negative terminal B- of the battery cluster are connected by a power line 11.

[0041] The communication system of the energy storage battery includes a plurality of control modules, including a master control module 12 and a slave control module 13 corresponding to each battery pack 10;

[0042] Any control module is arranged on any power line 11.

[0043] The master control module 12 and any slave control module 13 interact information through the power line 11 using a carrier signal.

[0044] The power line is a cable specially used for transmitting electric energy, which is an important part of the energy storage battery, responsible for transmitting electric energy from the power supply point to the electrical equipment to meet the power demand of various equipment and facilities. The positive terminal B+ and the negative terminal B- of the battery cluster can be connected to the electrical equipment or the charger to discharge the electrical equipment or receive the electric energy of the charger for charging. The carrier signal is a high-frequency signal, and the frequency of the carrier signal is greater than the set threshold, which is much greater than the frequency of the interference signal, so that the master module 12 or the slave module 13 can distinguish the carrier signal from the interference signal.

[0045] The battery pack 10 includes a plurality of battery cells, which can be connected in series or parallel between the positive and negative terminals of the battery pack. In order to monitor the state of the battery pack 10, information interaction is required between the master module 12 and the corresponding slave module 13 of the battery pack 10. The energy storage battery includes m battery packs 10, and m+1 control modules are correspondingly provided, where m is an integer greater than or equal to 2. Among them, at least one control module can be correspondingly provided on part of the power lines 11, and the remaining power lines 11 are not provided with control modules, or one control module is correspondingly provided on any power line 11. Among them, the control module can be directly electrically connected or coupled.

[0046] Further, the carrier signal includes a first carrier signal or a second carrier signal. The master module 12 is used to convert the battery pack information acquisition instruction into a first carrier signal, and transmit the first carrier signal to the power line 11 connected with the master module 12. The slave module 13 receives the first carrier signal through the power line 11, and converts the first carrier signal into a battery pack information acquisition instruction, and acquires the basic information of the battery pack according to the battery pack information acquisition instruction, and converts the basic information of the battery pack into a second carrier signal, and transmits the second carrier signal to the power line 11 connected with the slave module 13. The master module 12 converts the second carrier signal into the basic information of the battery pack.

[0047] For example, when the master module 12 needs to acquire the voltage of the battery pack 10, the master module 12 generates a first carrier signal according to the battery pack information acquisition instruction, and the first carrier signal is transmitted through the power line 11. The slave module 13 receives the first carrier signal and analyzes the battery pack information acquisition instruction according to the first carrier signal, and then acquires the voltage of the battery pack 10 corresponding to the slave module 13, i.e. the basic information, according to the battery pack information acquisition instruction. The slave module 13 converts the voltage into a second carrier signal that can be transmitted on the power line 11, and transmits it on the power line 11. After receiving the second carrier signal, the master module 12 analyzes the voltage of each battery cell in the battery pack 10 according to the second carrier signal, so as to determine whether the voltage of the battery cell is too large or too small, or to perform voltage equalization.

[0048] The communication system of the energy storage battery is closely integrated with the energy storage battery, so that the data acquisition and monitoring capability is seamlessly connected with a battery management system (BMS) or an energy management system (EMS), and the integration and intelligent level of the system are improved. The communication system is integrated with the battery cluster, so that additional communication equipment and facility arrangement are avoided, and the construction and operation and maintenance cost of the system is reduced.

[0049] The communication system of the energy storage battery in the embodiment of the application comprises a plurality of control modules, the plurality of control modules comprise a master control module and a slave control module corresponding to the battery pack one by one; any one control module is arranged on any one power line. The master control module and any slave control module interact information by using a carrier signal through the power line. The carrier signal output by the master control module or the slave control module is injected into the power line, and signal transmission is relied on the power line, so that the complex installation and spectrum resource contention problem in the traditional wired or wireless communication is eliminated, and the efficiency and stability of data transmission are improved. Information transmission is carried out by using the power line, and the communication harness is no longer used, so that the battery pack no longer has a weak current connection, the insulation problem of the battery cell in the battery pack caused by the communication harness is eliminated, and the safety and reliability of the communication system are improved.

[0050] With reference to FIG. 1, optionally, the master control module 12 is connected with the power line 11 connected with the positive electrode end B+ of the battery cluster, and for any slave control module 13, the slave control module 13 is connected with the power line 11 connected with the negative electrode of the battery pack 10 corresponding to the slave control module 13; or the master control module 12 is connected with the power line 11 connected with the negative electrode end B- of the battery cluster, and for any slave control module 13, the slave control module 13 is connected with the power line 11 connected with the positive electrode of the battery pack 10 corresponding to the slave control module 13.

[0051] In FIG. 1, the master control module 12 is correspondingly arranged with the power line 11 connected with the negative electrode end B- of the battery cluster, and for any slave control module 13, the slave control module 13 is correspondingly arranged with the power line 11 connected with the positive electrode of the battery pack 10 corresponding to the slave control module 13.

[0052] One control module is connected on one power line, and the control module is arranged on the power line connected with the corresponding battery pack, so that the control module can collect information of the corresponding battery pack 10.

[0053] With reference to FIG. 1, optionally, the control module comprises a control unit 141, a modulation and demodulation unit 142 and an information coupling unit 143;

[0054] The modulation and demodulation unit 142 is connected with the control unit 141 and the information coupling unit 143 respectively, and is configured to modulate the signal output by the control unit 141 into a carrier signal, and also configured to demodulate the carrier signal received by the information coupling unit 143 and transmit to the control unit 141;

[0055] The information coupling unit 143 is also connected with the power line 11 to which the control module to which the information coupling unit 143 belongs is connected, and is configured to receive the carrier signal on the power line 11, and also configured to transmit the carrier signal generated by the modulation and demodulation unit 142 to the power line 11.

[0056] Specifically, the modulation and demodulation unit 142 of the master control module 12 can convert the battery pack information acquisition instruction into a high-frequency first carrier signal suitable for transmission on the power line 11 through modulation technology, and extract the original data signal, i.e. the above-mentioned basic information of the battery pack, from the second carrier signal through demodulation technology. The control unit 141 of the master control module 12 further processes and analyzes according to the basic information of the battery pack. Optionally, the basic information of the battery pack includes at least one of the voltage and the temperature of the battery pack. After receiving the voltage and the temperature of the battery pack feedback from the slave control module 13, the control unit 141 of the master control module 12 can further control the related behaviors of the slave control module 13, such as balancing, diagnosis, etc. Optionally, the control unit 141 of the master control module 12 includes a micro control unit (MCU) for analyzing and processing the data signal.

[0057] The modulation and demodulation unit 142 of the slave control module 13 converts the first carrier signal into a battery pack information acquisition instruction through demodulation technology, and converts the acquired basic information of the battery pack into a second carrier signal through modulation technology. The control unit 141 of the slave control module 13 collects the basic information of the battery pack 10 according to the received battery pack information acquisition instruction. Optionally, the control unit of the slave control module 13 includes an analog front end (AFE) chip, which can be used to collect the voltage and temperature of the battery cell in the battery pack.

[0058] The information coupling unit 143 of the master control module 12 is configured to inject the first carrier signal output by the modem unit 142 of the master control module 12 onto the power line 11, and is also configured to transmit the second carrier signal received from the power line 11 to the modem unit 142 of the master control module 12. The information coupling unit 143 of the slave control module 13 is configured to transmit the first carrier signal received from the power line 11 to the modem unit 142 of the slave control module 13, and is also configured to transmit the second carrier signal output by the modem unit 142 of the slave control module 13 onto the power line 11. Optionally, the information coupling unit 143 can include one of a transformer, an optoelectronic coupler, and a capacitor.

[0059] With reference back to FIG. 1, optionally, the information coupling unit 143 includes a coil 1431 and a magnetic ring 1432, the input end of the coil 1431 is connected to the modem unit 142, and the coil 1431 is wound around the magnetic ring 1432.

[0060] The magnetic ring 1432 is sleeved on the power line 11 connected to the control module 12.

[0061] The coil 1431 includes a first end and a second end, both of which are connected to the modem unit 142. The coil 1431 and the magnetic ring 1432 form a transformer to couple the signal transmitted by the modem unit 142 to the power line 11, and to couple the signal on the power line 11 to the modem unit 142. The information coupling unit 142 only includes the coil 1431 and the magnetic ring 1432, which has a simple structure and is easy to implement.

[0062] With reference back to FIG. 1, optionally, the modem unit 142 includes a modulation circuit and a demodulation circuit.

[0063] The input end of the modulation circuit is connected to the control unit 141, and the output end of the modulation circuit is connected to the information coupling unit 143. The modulation circuit is configured to modulate the signal output by the control unit 141 into a carrier signal.

[0064] The input end of the demodulation circuit is connected to the information coupling unit 143, and the output end of the demodulation circuit is connected to the control unit 141. The demodulation circuit is configured to demodulate the carrier signal received by the information coupling unit 143.

[0065] The modulation circuit of the master control module 12 is configured to modulate the battery pack information acquisition instruction into a first carrier signal, and the demodulation circuit of the master control module 12 is configured to demodulate the second carrier signal to obtain the original data signal, i.e., the basic information of the battery pack as described above. The demodulation circuit of the slave control module 13 is configured to demodulate the first carrier signal into a battery pack information acquisition instruction, and the modulation circuit of the slave control module 13 is configured to modulate the obtained basic information of the battery pack into a second carrier signal.

[0066] Further, an input end of the modulation circuit is electrically connected with the control unit 141, and an output end of the modulation circuit is electrically connected with the coil 1431. An input end of the demodulation circuit is electrically connected with the coil 1431, and an output end of the demodulation circuit is electrically connected with the control unit 141. The modulation circuit and the demodulation circuit are connected with different ends of the control unit 141.

[0067] Compared with the wired communication mode, the power line communication mode only connects the positive and negative power lines between the battery packs, saves the communication lines and the corresponding connectors, and is more convenient to install, maintain and replace; using the power line as the signal transmission medium, the communication distance that can be achieved is also longer; the insulation voltage resistance hidden danger of the battery cell and the communication harness is eliminated, and it is more reliable and safe. Compared with the wireless communication mode, the power line communication mode has higher safety and reliability, lower power consumption and smaller radiation interference because the power line 11 is used as the signal transmission medium.

[0068] The embodiment of the application further provides a communication method of the communication system of the energy storage battery, and Fig. 2 is a flowchart of the communication method of the communication system of the energy storage battery provided by the embodiment of the application. Referring to Figs. 1 and 2, the method comprises the following steps:

[0069] S110: The master control module 12 converts the battery pack information acquisition instruction into a first carrier signal, and transmits the first carrier signal to the power line 11 connected with the master control module 12.

[0070] The battery pack information acquisition instruction is an instruction for acquiring the basic information such as voltage and temperature of the battery pack, which can be output by the upper computer. The master control module 12 converts the signal to be transmitted, i.e., the battery pack information acquisition instruction, into a high-frequency first carrier signal suitable for transmission on the power line 11, and couples the first carrier signal to the power line 11.

[0071] S120: The slave control module 13 converts the first carrier signal into the battery pack information acquisition instruction, acquires the basic information of the battery pack according to the battery pack information acquisition instruction, converts the basic information of the battery pack into a second carrier signal, and transmits the second carrier signal to the power line 11 connected with the slave control module 13.

[0072] The slave control module 13 analyzes the battery pack information acquisition instruction according to the first carrier signal, acquires the basic information of the battery pack according to the battery pack information acquisition instruction, converts the basic information of the battery pack into a high-frequency second carrier signal that can be transmitted on the power line 11, and couples the second carrier signal to the power line 11.

[0073] S130: The master control module 12 converts the second carrier signal into the basic information of the battery pack.

[0074] The communication method in the embodiment utilizes the power line as a signal transmission medium, superimposes or extracts a high-frequency carrier signal on the power line, thereby realizing data transmission and communication, eliminating the complex installation and spectrum resource contention problems in traditional wired or wireless communication, and improving the efficiency and stability of data transmission. Using the power line for information transmission eliminates the use of communication wiring harness, and the battery pack no longer has a weak current connection to the outside, eliminating the pressure insulation problem of the battery cells in the battery pack caused by the communication wiring harness, and improving the safety and reliability of the communication system.

[0075] Optionally, before S110, further comprising:

[0076] The address information of each slave control module 13 is obtained, and the address information of different slave control modules 13 is different.

[0077] The address information of the slave control module 13 to be executed by the battery pack information acquisition instruction is included in the first carrier signal.

[0078] Each slave control module 13 is provided with address information, and different address information represents different slave control modules 13. When the master control module 12 wants to acquire the basic information of the target battery pack, such as the first battery pack, the first carrier signal generated carries the address information of the slave control module 13 corresponding to the first battery pack, so that when the first carrier signal is transmitted on the power line 11 and received by each slave control module 13, only the slave control module 13 corresponding to the first battery pack feeds back the basic information of the first battery pack to the master control module 12, thereby realizing the information interaction between the master control module 12 and the first slave control module. The slave control module 13 executing the battery pack information acquisition instruction is the slave control module 13 feeding back the first carrier signal. The basic information of the battery pack includes at least one of the voltage and the temperature of the battery pack.

[0079] The application further provides a vehicle comprising an energy storage battery and a communication system of the energy storage battery according to any one of the above embodiments. The vehicle has the same beneficial effects as the communication system of the energy storage battery, which will not be repeated here.

[0080] It should be understood that the various forms of flow shown above can be reordered, added or deleted steps. For example, the steps described in the present application can be executed in parallel, sequentially or in different order, as long as the desired results of the technical solutions of the present application can be achieved, which is not limited herein.

[0081] It should be noted that the various modules and units involved above can be implemented by hardware devices, including corresponding circuits or devices, etc.

[0082] Any technical features in the above embodiments can be combined, and for the sake of brevity, not all possible combinations are described above, however, as long as the combinations of technical features do not have contradictions, they shall be considered within the scope of the present disclosure.

[0083] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it shall not be understood as a limitation on the patent scope of the present application. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these shall be within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A communication system for an energy storage battery, characterized by, The energy storage battery comprises a battery cluster; The battery cluster comprises a plurality of battery packs connected in series between a positive terminal and a negative terminal of the battery cluster, and one power line is connected between adjacent two battery packs, one power line is connected between the positive terminal of the battery cluster and the positive terminal of the first battery pack, and one power line is connected between the negative terminal of the last battery pack and the negative terminal of the battery cluster; The communication system of the energy storage battery comprises a plurality of control modules, and the plurality of control modules comprise a master control module and a plurality of slave control modules corresponding to the battery packs one by one; Any one of the control modules is arranged on any one of the power lines; The master control module and any one of the slave control modules exchange information through the power line by using a carrier signal.

2. The communication system of the energy storage battery according to claim 1, wherein The master control module is connected to the power line connected to the positive terminal of the battery cluster, and for any one of the slave control modules, the slave control module is connected to the power line connected to the negative terminal of the battery pack corresponding to the slave control module; or the master control module is connected to the power line connected to the negative terminal of the battery cluster, and for any one of the slave control modules, the slave control module is connected to the power line connected to the positive terminal of the battery pack corresponding to the slave control module.

3. The communication system of the energy storage battery of claim 1, wherein, The control module comprises a control unit, a modulation and demodulation unit and an information coupling unit; The modulation and demodulation unit is connected to the control unit and the information coupling unit respectively, and is used for modulating the signal output by the control unit into a carrier signal, and is also used for demodulating the carrier signal received by the information coupling unit and transmitting the carrier signal to the control unit; The information coupling unit is also connected to the power line connected to the control module to which the information coupling unit belongs, and is used for receiving the carrier signal on the power line and transmitting the carrier signal generated by the modulation and demodulation unit to the power line.

4. The communication system of an energy storage battery of claim 3, wherein, The modulation and demodulation unit comprises a modulation circuit and a demodulation circuit; The input end of the modulation circuit is connected to the control unit, the output end of the modulation circuit is connected to the information coupling unit, and the modulation circuit is used for modulating the signal output by the control unit into the carrier signal; The input end of the demodulation circuit is connected to the information coupling unit, the output end of the demodulation circuit is connected to the control unit, and the demodulation circuit is used for demodulating the carrier signal received by the information coupling unit.

5. The energy storage battery communication system of claim 3, wherein, The information coupling unit comprises a coil and a magnetic ring, the input end of the coil is connected to the modulation and demodulation unit, and the coil is wound on the magnetic ring; The magnetic ring is sleeved on the power line connected to the control module to which the magnetic ring belongs.

6. The energy storage battery communication system of claim 3, wherein, The control unit of the master control module comprises a microcontroller; The control unit of the slave control module comprises an analog front-end chip.

7. A communication method of a communication system of an energy storage battery, characterized by, The communication system of the energy storage battery according to any one of claims 1-6; The communication method of the communication system of the energy storage battery comprises: The master control module converts the battery pack information acquisition instruction into a first carrier signal and transmits the first carrier signal to the power line connected to the master control module; The slave module converts the first carrier signal into the battery pack information acquisition instruction, acquires the basic information of the battery pack according to the battery pack information acquisition instruction, converts the basic information of the battery pack into a second carrier signal, and transmits the second carrier signal to the power line connected with the slave module; The master module converts the second carrier signal into the basic information of the battery pack.

8. The communication method of the communication system of the energy storage battery according to claim 7, wherein, Before the master module converts the battery pack information acquisition instruction into the first carrier signal, the method further comprises: acquiring address information of each slave module, wherein the address information of different slave modules is different; The first carrier signal comprises address information of the slave module to be executed with the battery pack information acquisition instruction.

9. The communication method of the communication system of the energy storage battery according to claim 7, wherein, The basic information of the battery pack comprises at least one of voltage and temperature of the battery pack.

10. A vehicle characterized by comprising: A communication system comprising an energy storage battery and the energy storage battery of any one of claims 1-6.

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