Daisy chain communication circuit

Abstract

The utility model provides a daisy chain communication circuit. The circuit comprises a daisy chain data analysis device, a battery cluster management unit and a battery management module. The battery cluster management unit and the battery management module are connected through a forward daisy chain communication link and a reverse daisy chain communication link; at least one of the forward daisy chain communication link and the reverse daisy chain communication link is provided with a daisy chain data analysis device used for processing daisy chain communication signals transmitted between the battery cluster management unit and the battery management module. According to the daisy chain communication circuit provided by the utility model, the daisy chain data analysis device is additionally arranged, and the daisy chain data analysis device can analyze the daisy chain communication signals and can analyze and record the daisy chain communication signals in the daisy chain communication circuit, so that fault reasons can be checked when communication faults occur subsequently.

Description

Technical Field

[0001] The utility model relates to the technical field of circuits, in particular to a daisy chain communication circuit. Background Art

[0002] Energy storage systems composed of batteries have begun to be widely used. The battery cluster management unit (CMU) and battery management unit (BMU) in the energy storage system usually communicate with each other in a daisy chain manner. Therefore, the CMU and BMU form a daisy chain communication circuit.

[0003] The current daisy chain communication circuit cannot analyze the daisy chain communication signal generated during communication. When a communication failure occurs, the cause of the failure cannot be found. Utility Model Content

[0004] In view of this, an embodiment of the present invention provides a daisy chain communication circuit, which is provided with a daisy data analysis device to analyze the daisy chain communication signal and to perform troubleshooting when a circuit communication failure occurs.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A daisy chain communication circuit, comprising:

[0007] Daisy-chain data analysis device, battery cluster management unit and battery management module;

[0008] The battery cluster management unit and the battery management module are connected via a forward daisy chain communication link and a reverse daisy chain communication link;

[0009] At least one of the forward daisy chain communication link and the reverse daisy chain communication link is provided with a daisy chain data analysis device for processing a daisy chain communication signal transmitted between the battery cluster management unit and the battery management module.

[0010] The above-mentioned daisy chain communication circuit, optionally, the battery management module includes at least one battery management unit;

[0011] The daisy chain ports of the battery management units are sequentially cascaded to form a daisy chain communication structure;

[0012] A daisy chain port in the battery management unit at the front end of the daisy chain communication structure that is not connected to other battery management units serves as a communication port of the battery management module in the forward daisy chain communication link;

[0013] The daisy chain port in the battery management unit at the rear end of the daisy chain communication structure that is not connected to other battery management units serves as the communication port of the battery management module in the reverse daisy chain communication link.

[0014] The daisy chain communication circuit mentioned above, optionally, the battery management unit includes:

[0015] a first isolation device, a second isolation device, and a communication transformer;

[0016] The first isolation device is connected to the second isolation device via the communication transformer;

[0017] The port of the first isolation device that is not connected to the communication transformer is a daisy chain port of the battery management unit, and the port of the second isolation device that is not connected to the communication transformer is another daisy chain port of the battery management unit.

[0018] The daisy chain communication circuit mentioned above, optionally, the battery cluster management unit includes:

[0019] a first transceiver, a second transceiver, a third isolator, a fourth isolator, and a processor;

[0020] One end of the first transceiver is connected to the processor, and the other end of the first transceiver is connected to the first port of the third isolator;

[0021] The second port of the third isolator serves as a communication port of the battery cluster management unit in the forward daisy chain communication link;

[0022] One end of the second transceiver is connected to the processor, and the other end of the second transceiver is connected to the first port of the fourth isolator;

[0023] The second port of the fourth isolator serves as a communication interface of the battery cluster management unit in the reverse daisy chain communication link.

[0024] The daisy chain communication circuit mentioned above, optionally, the daisy chain data analysis device includes:

[0025] A master signal format conversion chip, a slave signal format conversion chip, and a single chip microcomputer;

[0026] The first interface of the signal format conversion chip is the first communication interface of the daisy chain data analysis device, and the first communication interface is used to connect to the battery cluster management unit;

[0027] The second interface of the slave signal format conversion chip is connected to the first interface of the master signal format conversion and the single chip microcomputer respectively;

[0028] The first interface of the main signal format conversion chip is connected to the single chip microcomputer, the second interface of the main signal format conversion chip is the second communication interface of the daisy chain data analysis device, and the second communication interface is used to connect to the battery management module.

[0029] The above-mentioned daisy chain communication circuit, optionally, when the daisy chain data analysis device receives the daisy chain communication signal sent by the battery cluster management unit, the slave signal format conversion chip connected to the battery cluster management unit is used to convert the received daisy chain communication signal into a communication conversion signal of a preset signal format;

[0030] The master signal format conversion chip connected to the slave signal format conversion chip is used to restore the communication conversion signal to a daisy chain communication signal, and send the restored daisy chain communication signal to the connected battery management module.

[0031] The above-mentioned daisy chain communication circuit, optionally, when the daisy chain data analysis device receives the daisy chain communication signal sent by the battery management module, the main signal format conversion chip connected to the battery management module is used to convert the received daisy chain communication signal into a communication conversion signal of a preset signal format;

[0032] The slave signal format conversion chip connected to the master signal format conversion chip is used to restore the communication conversion signal to a daisy chain communication signal, and send the restored daisy chain communication signal to the connected battery cluster management unit.

[0033] In the above-mentioned daisy chain communication circuit, optionally, the single chip microcomputer is used to identify the communication conversion signal generated when the slave signal format conversion chip and the master signal format conversion chip convert the daisy chain communication signal.

[0034] The above-mentioned daisy chain communication circuit may optionally include a storage module provided in the single-chip microcomputer for storing the communication conversion signal recognized by the single-chip microcomputer, wherein the communication conversion signal is a signal generated when the slave signal format conversion chip and the master signal format conversion chip convert the daisy chain communication signal.

[0035] The above-mentioned daisy chain communication circuit may optionally further include: a fault troubleshooting module for reading data in the single-chip microcomputer of the daisy chain data analysis device.

[0036] In the above-mentioned daisy chain communication circuit, optionally, when the number of the daisy chain data analysis device is 1, the daisy chain data analysis device is provided in the forward daisy chain communication link between the battery cluster management unit and the battery management module.

[0037] In the above-mentioned daisy chain communication circuit, optionally, when the number of the daisy chain data analysis device is 1, the daisy chain data analysis device is provided in the reverse daisy chain communication link between the battery cluster management unit and the battery management module.

[0038] The above-mentioned daisy chain communication circuit, optionally, when the number of the daisy chain data analysis devices is 2, one of the daisy chain data analysis devices is arranged in the reverse daisy chain communication link between the battery cluster management unit and the battery management module, and the other daisy chain data analysis device is arranged in the reverse daisy chain communication link between the battery cluster management unit and the battery management module.

[0039] Compared with the prior art, the utility model has the following advantages:

[0040] The daisy-chain communication circuit provided by the present invention includes a daisy-chain data analysis device, a battery cluster management unit (BMU), and a battery management module (BMM). The BMU and BMM are connected via a forward daisy-chain communication link and a reverse daisy-chain communication link. At least one of the forward and reverse daisy-chain communication links is provided with a daisy-chain data analysis device for processing daisy-chain communication signals transmitted between the BMU and BMM. The daisy-chain communication circuit provided by the present invention includes a daisy-chain data analysis device that can analyze and record daisy-chain signals in the daisy-chain communication circuit, thereby facilitating troubleshooting in the event of a communication failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0042] Figure 1 This is a structural diagram of a daisy chain communication circuit provided by the utility model;

[0043] Figure 2 This is another structural schematic diagram of a daisy chain communication circuit provided by the utility model;

[0044] Figure 3 This is another structural diagram of a daisy chain communication circuit provided by the utility model;

[0045] Figure 4 This is another structural schematic diagram of a daisy chain communication circuit provided by the utility model. DETAILED DESCRIPTION

[0046] 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 embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0047] The present invention can be used in a variety of general or special computing device environments or configurations, such as personal computers, server computers, handheld or portable devices, tablet devices, multi-processor devices, and distributed computing environments including any of the above devices or equipment.

[0048] In order to solve the problem in the prior art that daisy chain signals cannot be analyzed and the cause of communication failures is difficult to identify, the utility model adds a daisy chain data analysis device to the daisy chain communication circuit, which can analyze and record the daisy chain signals of the daisy chain communication circuit so as to facilitate troubleshooting when communication failures occur later.

[0049] The utility model provides a daisy chain communication circuit, which includes: a daisy chain data analysis device, a battery cluster management unit and a battery management module; the battery cluster management unit and the battery management module are connected via a forward daisy chain communication link and a reverse daisy chain communication link; at least one of the forward daisy chain communication link and the reverse daisy chain communication link is provided with a daisy chain data analysis device for processing daisy chain communication signals transmitted between the battery cluster management unit and the battery management module.

[0050] Reference Figure 1 , is a structural diagram of a daisy chain communication circuit provided by the utility model, and is specifically described as follows:

[0051] The daisy chain communication circuit provided by the present invention includes: a daisy chain data analysis device 101, a battery cluster management unit 102 and a battery management module 103; the battery cluster management unit 102 and the battery management module 103 are connected via a forward daisy chain communication link and a reverse daisy chain communication link; as shown in the figure, the daisy chain data analysis device 101 is arranged on the forward daisy chain communication link 104.

[0052] It should be noted that the communication mode of the forward daisy chain communication link and the reverse daisy chain communication link between the battery management module, the battery cluster management module and the daisy chain data analysis device are all daisy chain communication.

[0053] The forward daisy chain communication link and the reverse daisy chain communication link can be understood as signal channels, which are wireless links.

[0054] The communication mode between the battery cluster management unit and the battery management module can be a full-duplex communication mode.

[0055] The daisy-chain communication circuit provided by the present invention includes a daisy-chain data analysis device, a battery cluster management unit, and a battery management module. The battery cluster management unit and the battery management module are connected via a forward daisy-chain communication link and a reverse daisy-chain communication link. At least one of the forward daisy-chain communication link and the reverse daisy-chain communication link is provided with a daisy-chain data analysis device for processing daisy-chain communication signals transmitted between the battery cluster management unit and the battery management module. The daisy-chain data analysis device is added to the daisy-chain communication circuit provided by the present invention. The daisy-chain data analysis device can analyze the daisy-chain communication signals transmitted between the battery cluster management unit and the battery management module, analyze and record the daisy-chain signals in the daisy-chain communication circuit, so that the cause of the communication failure can be identified in the event of a subsequent communication failure.

[0056] Preferably, the daisy chain data analysis device can also be set in the reverse daisy chain communication link 104, and the specific structure is as follows: Figure 2 shown.

[0057] Furthermore, two daisy chain data analysis devices can be provided in the daisy chain communication circuit provided by the present invention, referring to Figure 3 , which is a structural schematic diagram of another daisy chain communication circuit provided by the utility model. As shown in the figure, a daisy chain data analysis device is set in the forward daisy chain communication link between the battery cluster management unit and the battery management module, and a daisy chain data analysis device is set in the reverse daisy chain communication link between the battery cluster management unit and the battery management module.

[0058] Further, Figure 1 The schematic diagram of the daisy chain communication circuit shown in FIG. 1 further illustrates the structures of the daisy chain data analysis device 101, the battery cluster management unit 102, and the battery management module 103. Figure 4 , which is a structural diagram of another daisy chain communication circuit provided by the present invention, and is specifically described as follows.

[0059] The battery management module includes at least one battery management unit; the daisy chain ports of each battery management unit are cascaded in sequence to form a daisy chain communication structure; the daisy chain port of the battery management unit at the front end of the daisy chain communication structure that is not connected to other battery management units serves as the communication port of the battery management module in the forward daisy chain communication link; the daisy chain port of the battery management unit at the back end of the daisy chain communication structure that is not connected to other battery management units serves as the communication port of the battery management module in the reverse daisy chain communication link. Figure 4As shown, the number of battery management units is N, and the value of N is any positive integer. The specific value of N can be set according to actual needs.

[0060] Preferably, the battery management unit includes: a first isolation device, a second isolation device and a communication transformer; the first isolation device is connected to the second isolation device through the communication transformer; the port of the first isolation device that is not connected to the communication transformer is a daisy chain port of the battery management unit, and the port of the second isolation device that is not connected to the communication transformer is another daisy chain port of the battery management unit.

[0061] The communication between the first isolation device, the second isolation device and the communication transformer is bidirectional, and the communication between the battery management units is also bidirectional.

[0062] It should be noted that when a daisy chain data analysis device is set in the forward daisy chain communication link of the battery cluster management unit and the battery management module, among the various battery management units forming the daisy chain communication structure, the daisy chain port of the battery management unit at the front end of the daisy chain communication structure that is not connected to other battery management units is connected to the daisy chain data analysis device; when a daisy chain data analysis device is not set in the forward daisy chain communication link of the battery cluster management unit and the battery management module, among the various battery management units forming the daisy chain communication structure, the daisy chain port of the battery management unit at the front end of the daisy chain communication structure that is not connected to other battery management units is connected to the battery cluster management unit.

[0063] It should be noted that when a daisy chain data analysis device is provided in the reverse daisy chain communication link between the battery cluster management unit and the battery management module, among the various battery management units forming the daisy chain communication structure, the daisy chain port of the battery management unit at the end of the daisy chain communication structure that is not connected to other battery management units is connected to the daisy chain data analysis device; when a daisy chain data analysis device is not provided in the reverse daisy chain communication link between the battery cluster management unit and the battery management module, among the various battery management units forming the daisy chain communication structure, the daisy chain port of the battery management unit at the end of the daisy chain communication structure that is not connected to other battery management units is connected to the battery cluster management unit.

[0064] Exemplarily, the communication transformer may be an AFE. The communication transformer of the present invention is not limited to an AFE, but may also be other devices having a communication transformer function, which will not be further illustrated here.

[0065] continue Figure 4 The battery cluster management unit is described, and includes: a first transceiver, a second transceiver, a third isolator, a fourth isolator, and a processor;

[0066] One end of the first transceiver is connected to the processor, and the other end of the first transceiver is connected to the first port of the third isolator;

[0067] The second port of the third isolator serves as a communication port of the battery cluster management unit in the forward daisy chain communication link;

[0068] One end of the second transceiver is connected to the processor, and the other end of the second transceiver is connected to the first port of the fourth isolator;

[0069] The second port of the fourth isolator serves as a communication interface of the battery cluster management unit in the reverse daisy chain communication link.

[0070] It should be noted that when a daisy chain data analysis device is provided in the forward daisy chain communication link between the battery cluster management unit and the battery management module, the second port of the third isolator is connected to the daisy chain data analysis device; when a daisy chain data analysis device is not provided in the forward daisy chain communication link between the battery cluster management unit and the battery management module, the second port of the third isolator is connected to the battery management module. In other words, the second port of the third isolator is connected to the daisy chain port of the battery management unit at the front end of the daisy chain communication structure formed in the battery management module that is not connected to other battery management units.

[0071] It should be noted that when a daisy chain data analysis device is provided in the reverse daisy chain communication link between the battery cluster management unit and the battery management module, the second port of the fourth isolator is connected to the daisy chain data analysis device; when a daisy chain data analysis device is not provided in the reverse daisy chain communication link between the battery cluster management unit and the battery management module, the second port of the fourth isolator is connected to the battery management module. In other words, the second port of the fourth isolator is connected to the daisy chain port of the battery management unit at the end of the daisy chain communication structure formed in the battery management module that is not connected to other battery management units.

[0072] Furthermore, the processor in the battery cluster management unit may be an ARM processor; the first transceiver and the second transceiver may both be isolated transceivers, specifically ADBMS5822. This is only for illustration and does not limit the specific models of the first transceiver and the second transceiver.

[0073] The processor in the battery cluster management unit has a clock (SCK) pin, an instruction (MOSI) pin, a data (MISO) pin, and two enable (EN) pins; IP and IM signals are transmitted between the transceiver and the isolation device, and different signals can be transmitted using different pins.

[0074] continue Figure 4 , a daisy chain data analysis device is described, the daisy chain data analysis device comprising:

[0075] A master signal format conversion chip, a slave signal format conversion chip, and a single chip microcomputer;

[0076] The first interface of the signal format conversion chip is used as the first communication interface of the daisy chain data analysis device, and the first communication interface is used to connect to the battery cluster management unit;

[0077] The second interface of the slave signal format conversion chip is connected to the first interface of the master signal format conversion and the single chip microcomputer respectively;

[0078] The first interface of the main signal format conversion chip is connected to the single chip microcomputer, and the second interface of the main signal format conversion chip is the second communication interface of the daisy chain data analysis device, and the second communication interface is used to connect to the battery management module.

[0079] The master signal format conversion chip and the slave signal format conversion chip in the present invention may both be ADI bridge chips. Furthermore, this is merely an example and does not limit the master signal format conversion chip and the slave signal conversion chip.

[0080] The master signal format conversion chip and the slave signal format conversion chip will convert the daisy-chain communication signal during the communication process between the battery cluster management unit and the battery management module. The conversion process will generate a communication conversion signal. The microcontroller recognizes the communication conversion signal and then saves the communication conversion signal. Furthermore, the communication conversion signal can be an SPI signal.

[0081] It should be noted that when the daisy-chain data analysis device receives a daisy-chain communication signal sent by the battery cluster management unit, the slave signal format conversion chip connected to the battery cluster management unit is used to convert the received daisy-chain communication signal into a communication conversion signal of a preset signal format; the master signal format conversion chip connected to the slave signal format conversion chip is used to restore the communication conversion signal to a daisy-chain communication signal, and send the restored daisy-chain communication signal to the connected battery management module; when the daisy-chain data analysis device receives a daisy-chain communication signal sent by the battery management module, the master signal format conversion chip connected to the battery management module is used to convert the received daisy-chain communication signal into a communication conversion signal of a preset signal format; the slave signal format conversion chip connected to the master signal format conversion chip is used to restore the communication conversion signal to a daisy-chain communication signal, and send the restored daisy-chain communication signal to the connected battery cluster management unit.

[0082] The single-chip microcomputer in the daisy chain data analysis device can identify the communication conversion signal generated by the master signal format conversion chip and the slave signal format conversion chip in the process of converting the daisy chain communication signal. The signal format of the communication conversion signal is a signal format that can be recognized by the single-chip microcomputer. The specific signal format can be set according to actual needs.

[0083] The microcontroller in this example has two signal interfaces, which are divided into instruction interface and data interface. Figure 4 As shown, the command interface includes a pin for receiving a command signal, a pin for receiving a clock signal, and a pin for receiving an enable signal; the data interface includes a pin for receiving an enable signal, a pin for receiving a clock signal, and a pin for receiving a data signal; further, different signal interfaces receive different signals; for example, the command interface is used to receive a daisy-chain communication signal from a battery cluster management unit; further, the daisy-chain communication signal of the battery cluster management unit may be a command signal; the data interface is used to receive a daisy-chain communication signal from a battery management module; and the daisy-chain communication signal of the battery management module may be feedback data.

[0084] Preferably, the daisy chain communication circuit provided by the present invention also includes a troubleshooting module for reading data in the single-chip microcomputer of the daisy chain data analysis device, and the troubleshooting module is connected to the external data interface of the single-chip microcomputer; the troubleshooting module reads the data stored in the single-chip microcomputer, and then analyzes the daisy chain communication status between the battery cluster management unit and the battery management module based on the read data to determine whether there is a fault in the communication between the battery cluster management unit and the battery management module; further, the data read by the troubleshooting module is the communication conversion signal collected by the single-chip microcomputer.

[0085] Furthermore, a daisy chain data analysis device is arranged between the battery cluster management unit and the battery management module. All daisy chain communication signals between the battery cluster management unit and the battery management module pass through the daisy chain data analysis device, which can capture all daisy chain communication signals. Two signal format conversion chips are used in the daisy chain data analysis device to convert the daisy chain communication signal into a universal communication conversion signal, and then restore the communication conversion signal to a daisy chain communication signal, thereby transmitting the daisy chain waveform normally and ensuring the normal operation of the system. The microcontroller can collect the communication conversion signal and record it, which is convenient for the microcontroller to identify and record data.

[0086] The master signal format conversion chip in the daisy chain data analysis device is connected to the slave signal format conversion chip. Preferably, the master signal format conversion chip sends MOSI, SCK and EN signals to the slave signal format conversion chip, and the slave bridge chip sends MISO signal to the master bridge chip. The single-chip microcomputer saves various signals when the master signal format conversion chip and the slave signal format conversion chip communicate, such as MISO, MOSI, SCK and EN signals.

[0087] Preferably, the daisy chain data analysis device provided by the present invention is provided with two signal format conversion chips, which are connected to each other, one configured as a master and the other configured as a slave. Two pairs of daisy chain interfaces serve as external interfaces, connected to the daisy chain port of the CMU and the daisy chain port of the BMU respectively.

[0088] By applying the daisy-chain communication circuit provided by the present invention, the daisy-chain signal can be transmitted normally without affecting the operation of the system. In the process of converting the daisy-chain communication signal, the daisy-chain data analysis device generates a communication conversion signal that can be recognized by the single-chip microcomputer. The single-chip microcomputer recognizes and then analyzes it, and then the single-chip microcomputer records the analyzed instructions and data into the storage module. Furthermore, the single-chip microcomputer has two communication interfaces, which respectively receive instructions from the CMU and data from the BMU. The CMU's instruction signal conversion requires enable EN, clock SCK, and instruction MOSI; the BMU's data signal conversion requires enable EN, clock SCK, and data MISO.

[0089] The daisy-chain communication circuit provided by this utility model can be equipped with a single daisy-chain data analysis device, located between the CMU and BMU1, to monitor data along the entire daisy-chain. Alternatively, two daisy-chain data analysis devices can be installed, one between the CMU and BMU1, and one between the CMU and BMUn. If the daisy-chain link between BMU1 and BMUn is broken, the CMU can control both the forward and reverse daisy-chain communication links. The two daisy-chain data analysis devices can then record both the commands and data from the forward and reverse daisy-chain communication links.

[0090] It should be noted that the daisy-chain data analysis device in this example is located between the CMU and the battery management module. This device can analyze commands sent from the CMU to the battery management module in the daisy-chain communication circuit, as well as data transmitted back from the BMU to the CMU. All daisy-chain signals communicated between the CMU and the battery management module pass through the daisy-chain data analysis device, allowing it to capture all daisy-chain signals. Two signal format conversion chips are set in the daisy chain data analysis device. The signal format conversion chip can also be a daisy chain bridge chip, where the two signal format conversion chips are interconnected by SPI, one signal format conversion chip is a master signal format conversion chip, and the other signal format conversion chip is a slave signal format conversion chip. The two pairs of daisy chain interfaces serve as external interfaces, respectively connected to the upper and lower ports of the daisy chain; further, the slave signal format conversion chip of the daisy chain data analysis device receives the daisy chain signal sent by the battery cluster management unit, and then drives the master signal format conversion chip through the SPI signal. The master signal format conversion chip converts the SPI signal into a daisy chain signal and sends it to the battery management module. The daisy chain communication signal is converted in the daisy chain data analysis device. The conversion process generates an SPI signal, and the SPI signal can be recognized by the microcontroller. The microcontroller can save the recognized SPI signal in the storage module of the microcontroller.

[0091] Although the daisy chain data analysis device in this example converts the daisy chain communication signal, the final transmitted signal is still a daisy chain communication signal, which can normally transmit the daisy chain waveform to ensure the normal operation of the system. At the same time, it can detect the instructions of the CMU and the data feedback from the battery management module, realizing the recording and analysis of daisy chain communication, and can be used to troubleshoot subsequent communication failures.

[0092] The specific implementation processes and derivative methods of the above-mentioned embodiments are all within the scope of protection of the present invention. The above-mentioned embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the above-mentioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above-mentioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

[0093] Although the present invention is disclosed as above, it is not limited thereto. Any person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope defined by the claims.

Claims

1. A daisy chain communication circuit, characterized in that: include: Daisy-chain data analysis device, battery cluster management unit and battery management module; The battery cluster management unit and the battery management module are connected via a forward daisy chain communication link and a reverse daisy chain communication link; At least one of the forward daisy-chain communication link and the reverse daisy-chain communication link is provided with a daisy-chain data analysis device for processing daisy-chain communication signals transmitted between the battery cluster management unit and the battery management module; Wherein, the daisy chain data analysis device includes: A master signal format conversion chip, a slave signal format conversion chip, and a single chip microcomputer; The first interface of the signal format conversion chip is the first communication interface of the daisy chain data analysis device, and the first communication interface is used to connect to the battery cluster management unit; The second interface of the slave signal format conversion chip is connected to the first interface of the master signal format conversion and the single chip microcomputer respectively; The first interface of the main signal format conversion chip is connected to the single chip microcomputer, the second interface of the main signal format conversion chip is the second communication interface of the daisy chain data analysis device, and the second communication interface is used to connect to the battery management module.

2. The daisy chain communication circuit according to claim 1, wherein: The battery management module includes at least one battery management unit; The daisy chain ports of the battery management units are sequentially cascaded to form a daisy chain communication structure; A daisy chain port in the battery management unit at the front end of the daisy chain communication structure that is not connected to other battery management units serves as a communication port of the battery management module in the forward daisy chain communication link; The daisy chain port in the battery management unit at the rear end of the daisy chain communication structure that is not connected to other battery management units serves as the communication port of the battery management module in the reverse daisy chain communication link.

3. The daisy chain communication circuit according to claim 2, wherein: The battery management unit comprises: a first isolation device, a second isolation device, and a communication transformer; The first isolation device is connected to the second isolation device via the communication transformer; The port of the first isolation device that is not connected to the communication transformer is a daisy chain port of the battery management unit, and the port of the second isolation device that is not connected to the communication transformer is another daisy chain port of the battery management unit.

4. The daisy chain communication circuit according to claim 1, wherein: The battery cluster management unit includes: a first transceiver, a second transceiver, a third isolator, a fourth isolator, and a processor; One end of the first transceiver is connected to the processor, and the other end of the first transceiver is connected to the first port of the third isolator; The second port of the third isolator serves as a communication port of the battery cluster management unit in the forward daisy chain communication link; One end of the second transceiver is connected to the processor, and the other end of the second transceiver is connected to the first port of the fourth isolator; The second port of the fourth isolator serves as a communication interface of the battery cluster management unit in the reverse daisy chain communication link.

5. The daisy chain communication circuit according to claim 1, wherein: When the number of the daisy chain data analysis device is 1, the daisy chain data analysis device is provided in the forward daisy chain communication link between the battery cluster management unit and the battery management module.

6. The daisy chain communication circuit according to claim 1, wherein: When the number of the daisy chain data analysis device is 1, the daisy chain data analysis device is provided in the reverse daisy chain communication link between the battery cluster management unit and the battery management module.

7. The daisy chain communication circuit according to claim 1, wherein: When the number of the daisy chain data analysis devices is 2, one of the daisy chain data analysis devices is arranged in the reverse daisy chain communication link between the battery cluster management unit and the battery management module, and the other daisy chain data analysis device is arranged in the reverse daisy chain communication link between the battery cluster management unit and the battery management module.

Images