Power supply management system suitable for multiple battery modules

Abstract

The utility model relates to a power supply management system suitable for multiple battery modules. The main control side at least comprises a main control unit, a main control side communication module and a voltage division network used for providing coding voltages, and the voltage division network can provide a plurality of coding voltages with completely different sizes; the power supply side is used for supplying power to the main control side and comprises a plurality of mutually independent battery modules, each battery module can supply power to the main control side, and each battery module is connected with the same main control communication interface provided by the main control side communication module, so that all the battery modules are in communication connection with the main control unit through the main control side communication module; each battery module collects a coding voltage provided by the voltage dividing network and communicates with the main control unit based on the collected coding voltage. According to the utility model, communication and monitoring management of different battery modules can be effectively realized, and the safety and reliability of power supply of the battery modules are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery management system, especially a power supply management system suitable for multiple battery modules. BACKGROUND

[0002] In an electronic device or integrated system containing battery management function, in order to meet the demand of high power or long time operation, multiple battery packs are usually configured to supply power. In order to facilitate maintenance and improve the reliability of the system, these battery packs are often divided into multiple battery modules, each of which is responsible for providing power and needs to communicate with the control device to monitor and manage the state information of the battery module, such as voltage, current, temperature, etc.

[0003] In order to manage and monitor the battery module, communication between the battery module and the control device is essential. At present, in order to meet the communication demand, each battery module is configured as an independent communication output, so that each battery module can be connected to the control device for individual communication. At this time, the control device needs to provide an independent communication interface for each battery module.

[0004] Since each battery module needs an independent communication interface, the control device needs to expand a large number of communication interfaces, which increases the hardware cost. With the increase of the number of battery modules, the hardware design and wiring of the control device become more and more complex, which increases the complexity of power supply and monitoring management and the difficulty of maintenance. It cannot adapt to different number of battery modules. For example, when the number of battery modules is increased or decreased, the control device needs to be adjusted accordingly. The hardware extension is poor, which cannot meet the actual demand of communication and monitoring management of battery modules. SUMMARY

[0005] The utility model aims at overcoming the defects in the prior art, and provides a power supply management system suitable for multiple battery modules, which can effectively realize communication and monitoring management of different battery modules and improve the safety and reliability of battery module power supply.

[0006] According to the technical scheme provided by the utility model, a power supply management system suitable for multiple battery modules comprises:

[0007] A master control side, at least including a master control unit, a master control side communication module and a voltage dividing network for providing coded voltage, wherein the voltage dividing network can provide multiple coded voltages with different sizes;

[0008] A power supply side for supplying power to the master control side, comprising a plurality of independent battery modules, each of which can supply power to the master control side, wherein,

[0009] Each battery module is connected with a same master communication interface provided by the master side communication module, so that all the battery modules are connected with the master control unit through the master side communication module, wherein each battery module collects an encoded voltage provided by the voltage division network, and communicates with the master control unit based on the collected encoded voltage.

[0010] Each battery module comprises a battery module, an isolated sampling connection unit, a battery control unit and a battery module communication unit, wherein,

[0011] The battery module is connected with a power supply connection end of the master side through a module power supply branch, and the battery module further provides operating voltages for the isolated sampling connection unit, the battery control unit and the battery module communication unit;

[0012] The isolated sampling connection unit collects an encoded voltage provided by the voltage division network, and the isolated sampling connection unit is connected with the battery control unit to transmit the collected encoded voltage to the battery control unit after isolation amplification conversion;

[0013] The battery control unit is connected with the battery module communication unit, and the battery control unit is adaptively connected with the master communication interface provided by the master communication module through the battery module communication unit.

[0014] The isolated sampling connection unit comprises a sampling amplification circuit, an analog-digital conversion circuit and an isolation connection circuit connected in sequence, wherein,

[0015] The sampling amplification circuit is adaptively connected with the voltage division network of the master side to collect an encoded voltage provided by the voltage division network;

[0016] The analog-digital conversion circuit performs analog-digital conversion on the amplified encoded voltage collected by the sampling amplification circuit, and transmits the analog-digital converted encoded voltage to the battery control unit through the isolation connection circuit.

[0017] The sampling amplification circuit comprises a sampling amplification chip, wherein,

[0018] The sampling amplification chip adopts a chip U7 with a model of OPA333, the IN+ end of the chip U7 is connected with the cathode end of a diode D10, the anode end of a diode D11, one end of a resistor R43 and one end of a resistor R44, the anode end of the diode D10 is grounded, the cathode end of the diode D11 is connected with a 5V2A voltage, the other end of the resistor R43 and the V- end of the chip U7 are grounded, and the other end of the resistor R44 is adaptively connected with the voltage division network of the master side to collect an encoded voltage provided by the voltage division network;

[0019] The VDD end of the chip U7 is connected with the 5V2A voltage and one end of a capacitor C26, and the other end of the capacitor C26 is grounded.

[0020] The IN end of the chip U7 is connected with one end of the resistor R39 and one end of the capacitor C25, the other end of the resistor R39 and the other end of the capacitor C25 are connected with the OUT end of the chip U7, the OUT end of the chip U7 is connected with one end of the resistor R40, the other end of the resistor R40 is connected with the analog-digital conversion circuit and one end of the capacitor C27, and the other end of the capacitor C27 is grounded.

[0021] The analog-digital conversion circuit comprises an analog-digital conversion chip, wherein,

[0022] The analog-digital conversion chip adopts a chip U6 with a model number of ADS1115, the AIN2 end of the chip U6 is connected with the resistor R40, the VDD end of the chip U6 is connected with a voltage 5V2 and one end of the capacitor C28, the other end of the capacitor C28 is grounded, and the ADDR2 end and the GND end of the chip U6 are both grounded.

[0023] The SCL end and the SDA end of the chip U6 are connected with the isolation connection circuit.

[0024] The isolation connection circuit comprises an isolation connection chip, wherein,

[0025] The isolation connection chip adopts a chip U9 with a model number of CA-IS3020S, the VCC1 end of the chip U9 is connected with the voltage 5V2 and grounded through the capacitor C30, the SDA1 end of the chip U9 is connected with the SDA end of the chip U6 and one end of the resistor R83, the SCL1 end of the chip U9 is connected with the SCL end of the chip U6 and one end of the resistor R82, and the other end of the resistor R82 and the other end of the resistor R83 are both connected with the voltage 5V2.

[0026] The VCC2 end of the chip U9 is connected with the voltage 3V3C and one end of the capacitor C29, the other end of the capacitor C29 is grounded, the SDA2 end of the chip U9 is connected with one end of the resistor R48 and the MCU_SDA end of the battery control unit, the SCL2 end of the chip U9 is connected with one end of the resistor R81 and the MCU_SCL end of the battery control unit, and the other end of the resistor R48 and the other end of the resistor R81 are both connected with the VCC voltage.

[0027] The GND1 end and the GND2 end of the chip U9 are both grounded.

[0028] Each battery module further comprises a module power supply module, and the module power supply module at least comprises a control unit power supply circuit and an isolation sampling connection unit power supply circuit, wherein,

[0029] Based on the 12V voltage of the battery module, the VCC voltage required by the battery control unit is generated through the control unit power supply circuit.

[0030] Based on the 12V voltage of the battery module, the isolated sampling connection unit power supply circuit provides at least the 5V2 voltage and the 5V2A voltage required by the isolated sampling connection unit.

[0031] The control unit power supply circuit comprises a control unit power supply chip,

[0032] The control unit power supply chip adopts a chip U5 of model TPS70933, the Vin end of the chip U5 is connected with one end of a capacitor C21, one end of a capacitor C22, one end of a resistor R36 and the 12V voltage provided by the battery module, and the other end of the capacitor C21, the other end of the capacitor C22, the other end of the resistor R36 and the EA end of the chip U5 are all grounded.

[0033] The Vout end of the chip U5 is connected with one end of a capacitor C23 and one end of a capacitor C24, and forms a VCC voltage output end, and the other end of the capacitor C23 and the other end of the capacitor C24 are all grounded.

[0034] The module power supply branch comprises a module power supply diode and a module power supply switch tube,

[0035] The positive end of the battery module is connected with the anode end of the module power supply diode, and the cathode end of the module power supply diode is connected with the power supply connection end of the master control side through the module power supply switch tube.

[0036] The adaptive connection between the battery module communication unit and the master control communication module comprises a communication connection based on an RS485 bus, a communication connection based on one-wire or a communication connection based on a CAN bus.

[0037] The utility model discloses the advantage: utilize the different encoding voltage of partial pressure network, utilize the isolated sampling connection unit in battery module group to the encoding voltage sampling, and can generate corresponding communication ID based on the encoding voltage gathered, and then can realize the communication connection between the master control unit, the communication connection that the communication connection that adopts does not depend on the type of battery module, that is to say, the versatility of battery module can be guaranteed.

[0038] Since a unique communication address does not need to be set for each battery module, the master control side only needs to provide different encoding voltages, without considering the grounding problem between the battery modules, the automatic identification and management of the battery modules can be effectively realized, the cumbersome operation of manual setting is reduced, and the scalability and reliability are improved. In addition, by sharing one communication bus, the number of pins is reduced, and the complexity and cost of power supply management are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 It is an embodiment structure block diagram of the utility model power supply management system.

[0040] Figure 2 is an embodiment structure block diagram of the isolation sampling connection unit.

[0041] Figure 3 is an embodiment circuit principle diagram of the sampling amplification circuit and the analog-digital conversion circuit.

[0042] Figure 4 is an embodiment circuit principle diagram of the isolation connection circuit.

[0043] Figure 5 is an embodiment circuit principle diagram of the control unit power supply circuit.

[0044] Figure 6 is an embodiment circuit principle diagram of the 5V2 power supply circuit.

[0045] Figure 7 is an embodiment circuit principle diagram of the 5V2A power supply circuit. DETAILED DESCRIPTION

[0046] The utility model will be further explained in connection with specific drawings and embodiments.

[0047] In order to effectively realize communication and monitoring management to different battery modules, the utility model provides a kind of power supply management system suitable for multiple battery modules, the power supply management system includes:

[0048] Master control side, at least including main control unit, master control side communication module and the voltage division network for providing coding voltage, wherein, voltage division network can provide multiple size completely different coding voltage;

[0049] Power supply side, for the power supply of master control side, including several independent battery module, each battery module can power supply master control side, wherein,

[0050] Each battery module is connected with the same master control communication interface provided by master control side communication module, to make all battery module be connected with main control unit by master control side communication module, wherein, each battery module collects one coding voltage provided by voltage division network, and based on the coding voltage collected and main control unit communication.

[0051] It can be understood that, master control side can be the control device of electronic equipment or management system mentioned in background art, power supply side is the power supply side that can power supply master control side, Figure 1 The embodiment of the power supply management system of the utility model is shown in the background art, therefore, power supply management is the management to the power supply of power supply side, as can be known from the description of background art, when power supply management, master control side and power supply side should be at least configured to communicate.

[0052] It should be noted that the power supply side is responsible for local monitoring, that is, direct monitoring and preliminary processing of individual battery cells within the battery module or battery pack. The main control side is responsible for overall monitoring and management, collecting data from various power supply sides, performing comprehensive analysis, and making corresponding decisions based on the data analysis results, such as adjusting charging / discharging strategies, estimating available power supply time, and monitoring the operating status of each battery module on the power supply side in real time. In addition, the main control side can also exchange information with other system components or external devices.

[0053] Specifically, the main control side should include a main control unit, a main control side communication module, and a voltage divider network. The main control unit is the primary functional unit responsible for control on the main control side. The main control unit can adopt a commonly used form, depending on its ability to achieve the required power supply management. The main control unit can communicate with the power supply side through the main control side communication module. The voltage divider network is used to provide multiple coded voltages of different magnitudes. Figure 1 An embodiment of the main control side is shown in the figure. Figure 1 In this context, the CAN communication interface within the main control side is one embodiment of the connection interface for the main control side model module.

[0054] In order to provide multiple encoded voltages, Figure 1 The system includes at least a reference voltage module and several voltage divider resistor units. The number of voltage divider resistor units should be consistent with the number of encoding voltages provided. The reference voltage module should be connected to the main control unit. The reference voltage module can adopt a commonly used form, as long as it can provide the required encoding voltage.

[0055] Figure 1 In this context, each voltage divider resistor unit typically includes at least two voltage divider resistors, such as... Figure 1 In this circuit, resistors R1 and R2 form a voltage divider unit. One end of resistor R1 is connected to the reference voltage provided by the reference voltage module, and the other end of resistor R1 is connected through one end of resistor R2. The other end of resistor R2 is grounded. By using resistors R1 and R2 to achieve voltage division, the corresponding encoded voltage can be obtained through resistor R2. The node formed by the interconnection of resistors R1 and R2 is the encoded voltage sampling terminal. At this time, the corresponding encoded voltage can be generated at the encoded voltage sampling terminal. The magnitude of the encoded voltage can be selected and determined according to actual needs.

[0056] Figure 1 In the diagram, resistors R3 and R4 form one voltage divider unit, and resistors R5 and R6 form another. The configuration of these voltage divider units can be found in the corresponding explanations above. Therefore, Figure 1 The diagram shows a voltage divider network that can simultaneously provide three different coded voltages. For situations requiring a different number of coded voltages, refer to [the diagram / reference needed]. Figure 1 The above explanation will not be repeated here.

[0057] In a specific implementation, the power supply side generally includes a battery module. Generally, the battery modules are independent of each other, that is, the power supply and communication state of one battery module is not limited by other battery modules. Figure 1 In the embodiment shown in FIG. 3, the power supply side includes three battery modules. In this case, one battery module can correspond to one coded voltage, and each battery module can supply power to the master side. Figure 1 In the embodiment shown in FIG. 3, the power supply output end of each battery module is connected to the power supply connection end of the master side. The master side can be supplied with power by the multiple battery modules at the same time, which is consistent with the prior art. It can be understood that when the master side is supplied with power by the multiple battery modules at the same time, the stability and reliability of the power supply of the master side can be improved.

[0058] In order to realize communication during power supply, each battery module should be connected to the same master communication interface provided by the master side communication module, that is, the battery module and the master side form a bus connection, and then the communication connection between the battery module and the master control unit through the master side communication module can be realized. As can be seen from the above description, the number of communication interfaces provided by the master side can be reduced, and the complexity of wiring can be reduced. In order to meet the communication requirements of each battery module and improve the expansion capability of power supply management, the battery module collects a coded voltage. Since the voltages of the coded voltages provided by the voltage dividing network are completely different, it can be seen that the coded voltages collected by the battery module are completely different, such as Figure 1 In the embodiment shown in FIG. 3, the three battery modules collect three corresponding coded voltages.

[0059] In a specific implementation, since each coded voltage is completely different, a communication ID for communication with the master control unit can be generated based on the collected coded voltage in the battery module. As can be seen from the above description, the communication ID generated by each battery module is completely different, and the reliability of communication can be ensured and communication conflicts can be avoided when all battery modules communicate with the master control unit through the master side communication module.

[0060] It can be understood that the coded voltages provided by the voltage dividing network are completely different, and the master control unit can determine the state of the coded voltage provided by the voltage dividing network. After the battery module generates a corresponding communication ID based on the collected coded voltage, the master control unit can determine the corresponding battery module during communication according to the correspondence between the communication ID and the coded voltage, that is, the automatic coding of the battery module can be realized, and the scalability of the communication connection can be effectively improved while meeting the communication connection.

[0061] In the embodiment, the communication ID is generated, and the communication connection mode and process of the generated communication ID with the main control unit are consistent with the prior art, except that the corresponding communication ID is generated by using the coding voltage in the battery module.

[0062] In the embodiment of the utility model, each battery module includes a battery module, an isolated sampling connection unit, a battery control unit and a battery module communication unit, wherein,

[0063] The battery module is connected with the power supply connection end of the main control side through a module power supply branch, and the battery module also provides working voltage for the isolated sampling connection unit, the battery control unit and the battery module communication unit.

[0064] The isolated sampling connection unit collects the coding voltage provided by the voltage dividing network, and is connected with the battery control unit to transmit the collected coding voltage after isolation amplification conversion to the battery control unit.

[0065] The battery control unit is connected with the battery module communication unit, and the battery control unit is adaptively connected with the main control communication interface provided by the main control communication module through the battery module communication unit.

[0066] Generally, each battery module can adopt the same form, Figure 1 An embodiment of each battery module is shown in the figure, Figure 1 As can be seen, the battery module can include a battery module, an isolated sampling connection unit, a battery control unit and a battery module communication unit, wherein the battery module can adopt the commonly used battery form, the battery module supplies power to the main control side, that is, the battery module supplies power to the main control side, of course, the battery module should also supply power to the isolated sampling connection unit, the battery control unit and the battery module communication unit.

[0067] Figure 1 In the figure, BAT1 is the battery module in the first battery module, and BAT2 is the battery module in the second battery module, and BAT3 is the battery module in the third battery module. In the first battery module, ADC is the isolated sampling connection unit; similarly, the ADC in the second battery module and the third battery module represents the corresponding isolated sampling connection unit.

[0068] In the embodiment, the battery module is connected with the power supply connection end of the main control side through a module power supply branch, and the battery module also provides working voltage for the isolated sampling connection unit, the battery control unit and the battery module communication unit.

[0069] It can be understood that when the module power supply switch tube is in the closed state, the battery module can supply power to the master side, and when the module power supply switch tube is in the open state, the battery module is disconnected from the power supply state of the master side. The connection form of the plurality of battery modules to the master side power supply can be consistent with the existing one, so as to meet the demand for power supply to the master side.

[0070] Figure 1 The embodiments of the corresponding module power supply branch in three battery modules are shown in the middle of the figure, Figure 1 In the middle, the module power supply diode D1 and the module power supply switch tube S1 form a module power supply branch, and similarly, the module power supply diode D2 and the module power supply switch tube S2 form another module power supply branch, and other cases can be referred to Figure 2 and the description here, and will not be illustrated one by one.

[0071] In specific implementation, the isolation sampling connection unit collects the encoded voltage provided by the voltage dividing network, and transmits the collected encoded voltage after isolation amplification conversion to the battery control unit. As can be seen, the isolation sampling connection unit can realize the collection of the encoded voltage. Thereafter, the encoded voltage is amplified, AD converted and isolated transmitted to the battery control unit, and the battery control unit can be consistent with the control unit used in the existing battery module. After transmitting the isolated amplified converted encoded voltage to the battery control unit, a corresponding communication ID can be generated in the battery control unit. Thereafter, the battery control module can be connected in communication with the master communication module through the battery module communication unit.

[0072] Figure 2 In the middle, the battery communication module should be adapted to the type of the master communication module, and the required communication connection can be realized in sequence. Specifically, the adaptive connection between the battery module communication unit and the master communication module includes RS485 bus-based communication connection, one-wire communication connection or CAN bus-based communication connection. Among them, the RS485 bus-based communication connection is the communication connection between the battery module communication unit and the master communication module to form the RS485 bus. Similarly, the one-wire communication connection is the communication connection between the battery module communication unit and the master communication module to form the one-wire, and the CAN bus-based communication connection is the communication connection between the battery module communication unit and the master communication module to form the CAN bus.

[0073] Specifically, when the master communication module adopts the CAN communication module, the battery communication module should also adopt the CAN communication module, at this time, the battery module and the master side are connected through the CAN bus communication. Similarly, when the master communication module adopts the RS485 communication module, the battery communication module should also adopt the RS485 communication module, at this time, the battery module and the master side are connected through the RS485 bus communication, and the mode and process of the RS485 communication connection can be consistent with the prior art, which will not be repeated here. The communication connection of one-line is a single bus protocol (1-Wire), which can realize bidirectional communication by only one data line plus ground line, can simplify wiring, and the mode of one-line communication can be consistent with the prior art, which will not be repeated here.

[0074] In an embodiment of the utility model, the isolation sampling connection unit includes sampling amplification circuit, analog-digital conversion circuit and isolation connection circuit which are connected in sequence, wherein,

[0075] The sampling amplification circuit is adaptively connected with the voltage dividing network of the master side to collect the coded voltage provided by the voltage dividing network;

[0076] The analog-digital conversion circuit converts the amplified coded voltage collected by the sampling amplification circuit into digital signal, and transmits the digital signal to the battery control unit through the isolation connection circuit.

[0077] Figure 1 An embodiment of the isolation sampling connection unit is shown in the figure, Figure 3 It can be seen that the isolation sampling connection unit should include sampling amplification circuit, analog-digital conversion circuit and isolation connection circuit which are connected in sequence, and the sampling amplification circuit is connected with the voltage dividing network of the master side to realize the collection of the coded voltage, Figure 4 In the embodiment shown in the figure, the sampling amplification circuit should be connected with the coded voltage sampling end between the resistor R1 and the resistor R2. The coded voltage collected by the sampling amplification circuit is generally an analog signal, which can be converted into digital signal through the analog-digital conversion circuit, and then the digital signal is transmitted to the battery control unit through the isolation connection circuit to meet the processing requirements of the battery control unit.

[0078] In an embodiment of the utility model, the sampling amplification circuit includes sampling amplification chip, wherein,

[0079] The sampling amplification chip adopts a chip U7 of model OPA333, the IN+ end of the chip U7 is connected with the cathode end of diode D10, the anode end of diode D11, one end of resistor R43 and one end of resistor R44, the anode end of diode D10 is grounded, the cathode end of diode D11 is connected with 5V2A voltage, the other end of resistor R43 and the V- end of chip U7 are grounded, the other end of resistor R44 is connected with the voltage dividing network of the master control side in an adaptive manner to collect the coded voltage provided by the voltage dividing network.

[0080] The VDD end of chip U7 is connected with 5V2A voltage and one end of capacitor C26, and the other end of capacitor C26 is grounded.

[0081] The IN- end of chip U7 is connected with one end of resistor R39 and one end of capacitor C25, the other end of resistor R39 and the other end of capacitor C25 are connected with the OUT end of chip U7, the OUT end of chip U7 is connected with one end of resistor R40, the other end of resistor R40 is connected with the analog-digital conversion circuit and one end of capacitor C27, and the other end of capacitor C27 is grounded.

[0082] Figure 4 An embodiment of the sampling amplification circuit is shown in the figure, the coded voltage is loaded to the IN+ end of chip U7 through resistor R44, then is amplified by chip U7, and the amplified coded voltage is loaded to the analog-digital conversion circuit through resistor R40.

[0083] In an embodiment of the utility model, the analog-digital conversion circuit comprises an analog-digital conversion chip, and

[0084] The analog-digital conversion chip adopts a chip U6 of model ADS1115, the AIN2 end of chip U6 is connected with resistor R40, the VDD end of chip U6 is connected with voltage 5V2 and one end of capacitor C28, the other end of capacitor C28 is grounded, and the ADDR2 end and GND end of chip U6 are both grounded.

[0085] The SCL end and SDA end of chip U6 are connected with the isolation connection circuit.

[0086] Figure 5 An embodiment of the analog-digital conversion circuit is shown in the figure, the amplified coded voltage is loaded to the AIN2 end of chip U6, then chip U6 loads the coded voltage of the converted digital signal to the isolation connection circuit through the SCL end and SDA end.

[0087] In an embodiment of the utility model, the isolation connection circuit comprises an isolation connection chip, and

[0088] The isolation connection chip adopts a chip U9 of a model CA-IS3020S, the VCC1 end of the chip U9 is connected with a 5V2 voltage and grounded through a capacitor C30, the SDA1 end of the chip U9 is connected with the SDA end of the chip U6 and one end of a resistor R83, the SCL1 end of the chip U9 is connected with the SCL end of the chip U6 and one end of a resistor R82, the other end of the resistor R82 and the other end of the resistor R83 are connected with the 5V2 voltage;

[0089] The VCC2 end of the chip U9 is connected with a 3V3C voltage and one end of a capacitor C29, the other end of the capacitor C29 is grounded, the SDA2 end of the chip U9 is connected with one end of a resistor R48 and the MCU_SDA end of the battery control unit, the SCL2 end of the chip U9 is connected with one end of a resistor R81 and the MCU_SCL end of the battery control unit, the other end of the resistor R48 and the other end of the resistor R81 are connected with the VCC voltage;

[0090] The GND1 end and the GND2 end of the chip U9 are grounded.

[0091] Figure 5 An embodiment of the isolation connection circuit is shown in the figure, through the isolation connection circuit, the isolation between the battery control unit and the isolation sampling connection unit can be realized, and the isolation between the battery control unit and the voltage dividing network can also be realized, so that the reliability of the collected coded voltage is improved.

[0092] It should be noted that the SCL end and the SDA end of the chip U6 form an IIC communication interface, which is connected to the SDA and SCL pins of the battery control unit through the chip U9, so that the battery control unit can read the voltage value collected by the chip U6.

[0093] In an embodiment of the utility model, each battery module further comprises a module power module, the module power module at least includes control unit power circuit and isolation sampling connection unit power circuit, wherein,

[0094] Based on the 12V voltage of the battery module, the VCC voltage required by the battery control unit is generated through the control unit power circuit;

[0095] Based on the 12V voltage of the battery module, the 5V2 voltage and the 5V2A voltage required by the isolation sampling connection unit are provided through the isolation sampling connection unit power circuit.

[0096] As can be seen from the above description, the battery module can not only supply power for the master control side, but also supply working voltage for the isolated sampling connection unit, the battery control unit and the battery module communication unit, and the 5V2 voltage, the 5V2A voltage and the VCC voltage described above are all generated based on the 12V voltage provided by the battery module. Specifically, the 5V2 voltage and the 5V2A voltage are both 5V voltages, wherein the 5V2A voltage is a power supply specification which clearly indicates that the output voltage of the power supply is 5V and the maximum output current is 2A.

[0097] In an embodiment of the utility model, the control unit power supply circuit includes control unit power supply chip, wherein,

[0098] The control unit power supply chip adopts a chip U5 with a model number of TPS70933, the Vin end of the chip U5 is connected with one end of a capacitor C21, one end of a capacitor C22, one end of a resistor R36 and the 12V voltage provided by the battery module, and the other end of the capacitor C21, the other end of the capacitor C22, the other end of the resistor R36 and the EA end of the chip U5 are all grounded;

[0099] The Vout end of the chip U5 is connected with one end of a capacitor C23 and one end of a capacitor C24, and forms a VCC voltage output end, and the other end of the capacitor C23 and the other end of the capacitor C24 are both grounded.

[0100] Figure 6 An embodiment of the control unit power supply circuit is shown in FIG. Figure 6 As can be seen from the above description, the battery module can not only supply power for the master control side, but also supply working voltage for the isolated sampling connection unit, the battery control unit and the battery module communication unit, and the 5V2 voltage, the 5V2A voltage and the VCC voltage described above are all generated based on the 12V voltage provided by the battery module. Specifically, the 5V2 voltage and the 5V2A voltage are both 5V voltages, wherein the 5V2A voltage is a power supply specification which clearly indicates that the output voltage of the power supply is 5V and the maximum output current is 2A.

[0101] As can be seen from the above description, the battery module can not only supply power for the master control side, but also supply working voltage for the isolated sampling connection unit, the battery control unit and the battery module communication unit, and the 5V2 voltage, the 5V2A voltage and the VCC voltage described above are all generated based on the 12V voltage provided by the battery module. Specifically, the 5V2 voltage and the 5V2A voltage are both 5V voltages, wherein the 5V2A voltage is a power supply specification which clearly indicates that the output voltage of the power supply is 5V and the maximum output current is 2A.

[0102] Figure 7 An embodiment of generating the 5V2 voltage by using the 5V2 power supply circuit is shown in FIG. Figure 7 In the embodiment, the 5V2 power supply circuit includes a first power supply chip, wherein the first power supply chip adopts a chip U4 with a model number of B0505S-1WR3.

[0103] The Vin end of the chip U4 is connected with a 12V voltage and one end of a capacitor C17, the other end of the capacitor C17 and the GND end of the chip U4 are grounded, the VO+ end of the chip U4 is connected with one end of a capacitor C19 and one end of a resistor R35, and a 5V2 voltage can be generated through the VO+ end of the chip U4, the other end of the capacitor C19, the other end of the resistor R35 and the OV end of the chip U4 are grounded.

[0104] Figure 3 An embodiment of the 5V2A power supply circuit is shown in FIG. Figure 3 In the embodiment, the 5V2A power supply circuit comprises a second power supply chip, wherein the second power supply chip adopts a chip U8 with a model of REF5040AIDR, the VIN end of the chip U8 is connected with a 5V2 voltage and one end of a capacitor C31, the other end of the capacitor C31 and the GND end of the chip U8 are grounded, the VOUT end of the chip U8 is connected with one end of a capacitor C32 and one end of a capacitor C33, and a 5V2A voltage can be obtained through the VOUT end of the chip U8, the other ends of the capacitor C32 and the capacitor C33 are grounded.

[0105] In the embodiment, the module power supply module can also adopt other circuit forms, and the specific circuit forms are subject to the 5V2 voltage and the 5V2A voltage required by the battery control unit and the isolation sampling connection unit power supply circuit, and the specific circuit forms are not listed here.

[0106] In addition, in order to improve the convenience of connection, each battery module is connected with the master control side through a corresponding interface circuit, Figure 3 An embodiment of setting the interface circuit in each battery module is shown in FIG. ​ In the embodiment, P10 is the interface circuit, the interface circuit 10 has four terminals, which can realize corresponding connection with the coding voltage sampling end, the ground, the RS485A end and the RS485B end, that is ​ An embodiment of adopting RS485 communication is shown in FIG.

[0107] As can be seen from the above description, the utility model provides different coding voltages by using a voltage dividing network, samples the coding voltage by using the isolation sampling connection unit in the battery module, generates a corresponding communication ID based on the collected coding voltage, and then realizes communication connection with the master control unit, and the communication connection is not dependent on the type of the battery module, that is, the universality of the battery module can be ensured.

[0108] Because it is not necessary to set a unique communication address for each battery module, the master side only needs to provide different coding voltages without considering the ground problem between battery modules, so that the automatic identification and management of battery modules can be effectively realized, the cumbersome operation of manual setting is reduced, and the scalability and reliability are improved. In addition, by sharing a communication bus, the number of pins is reduced, and the complexity and cost of power supply management are reduced.

Claims

1. A power supply management system suitable for a multi-battery module, characterized by, The power supply management system comprises: A master side, at least comprising a master control unit, a master side communication module and a voltage dividing network for providing coded voltages, wherein the voltage dividing network can provide a plurality of coded voltages with different sizes; A power supply side for supplying power to the master side, comprising a plurality of independent battery modules, each of which can supply power to the master side, wherein Each battery module is connected to the same master communication interface provided by the master side communication module, so that all battery modules are in communication connection with the master control unit through the master side communication module, wherein each battery module collects a coded voltage provided by the voltage dividing network and communicates with the master control unit based on the collected coded voltage.

2. The power supply management system for multi-battery modules according to claim 1, characterized by: Each battery module comprises a battery module, an isolated sampling connection unit, a battery control unit and a battery module communication unit, wherein The battery module is connected to the power supply connection end of the master side through a module power supply branch, and the battery module also provides operating voltages for the isolated sampling connection unit, the battery control unit and the battery module communication unit; The isolated sampling connection unit collects the coded voltage provided by the voltage dividing network, and the isolated sampling connection unit is connected to the battery control unit to transmit the isolated amplified and converted coded voltage to the battery control unit; The battery control unit is connected to the battery module communication unit, and the battery control unit is adaptively connected to the master communication interface provided by the master communication module through the battery module communication unit.

3. The power supply management system for multi-battery modules according to claim 2, characterized by: The isolated sampling connection unit comprises a sampling amplification circuit, an analog-to-digital conversion circuit and an isolation connection circuit connected in sequence, wherein The sampling amplification circuit is adaptively connected to the voltage dividing network of the master side to collect the coded voltage provided by the voltage dividing network; The analog-to-digital conversion circuit converts the amplified coded voltage collected by the sampling amplification circuit into an analog-to-digital signal, and transmits the analog-to-digital converted coded voltage to the battery control unit through the isolation connection circuit.

4. The power supply management system for multi-battery modules according to claim 3, characterized by: The sampling amplification circuit comprises a sampling amplification chip, wherein The sampling amplification chip adopts a chip U7 with a model number of OPA333, the IN+ end of the chip U7 is connected to the cathode end of a diode D10, the anode end of a diode D11, one end of a resistor R43 and one end of a resistor R44, the anode end of the diode D10 is grounded, the cathode end of the diode D11 is connected to a 5V2A voltage, the other end of the resistor R43 and the V- end of the chip U7 are grounded, and the other end of the resistor R44 is adaptively connected to the voltage dividing network of the master side to collect the coded voltage provided by the voltage dividing network; The VDD end of the chip U7 is connected to the 5V2A voltage and one end of a capacitor C26, and the other end of the capacitor C26 is grounded; The IN- end of the chip U7 is connected to one end of a resistor R39 and one end of a capacitor C25, the other end of the resistor R39, the other end of the capacitor C25 and the OUT end of the chip U7 are connected, the OUT end of the chip U7 is connected to one end of a resistor R40, the other end of the resistor R40 is connected to the analog-to-digital conversion circuit and one end of a capacitor C27, and the other end of the capacitor C27 is grounded.

5. The power supply management system for multi-battery modules according to claim 3, characterized by: The analog-to-digital conversion circuit comprises an analog-to-digital conversion chip, wherein The analog-to-digital conversion chip adopts a chip U6 of model ADS1115, the AIN2 end of the chip U6 is connected with the resistor R40, the VDD end of the chip U6 is connected with the voltage 5V2 and one end of the capacitor C28, the other end of the capacitor C28 is grounded, and the ADDR2 end and the GND end of the chip U6 are both grounded. The SCL end and the SDA end of the chip U6 are connected with an isolation connection circuit.

6. The power supply management system for multi-battery modules according to claim 3, characterized by: The isolation connection circuit comprises an isolation connection chip, wherein, The isolation connection chip adopts a chip U9 of model CA-IS3020S, the VCC1 end of the chip U9 is connected with the 5V2 voltage and grounded through the capacitor C30, the SDA1 end of the chip U9 is connected with the SDA end of the chip U6 and one end of the resistor R83, the SCL1 end of the chip U9 is connected with the SCL end of the chip U6 and one end of the resistor R82, the other end of the resistor R82 and the other end of the resistor R83 are both connected with the 5V2 voltage; the VCC2 end of the chip U9 is connected with the 3V3C voltage and one end of the capacitor C29, the other end of the capacitor C29 is grounded, the SDA2 end of the chip U9 is connected with one end of the resistor R48 and the MCU_SDA end of the battery control unit, the SCL2 end of the chip U9 is connected with one end of the resistor R81 and the MCU_SCL end of the battery control unit, the other end of the resistor R48 and the other end of the resistor R81 are both connected with the VCC voltage; the GND1 end and the GND2 end of the chip U9 are both grounded.

7. The power supply management system for multi-battery modules according to claim 2, characterized by: Each battery module further comprises a module power supply module, the module power supply module at least comprises a control unit power supply circuit and an isolated sampling connection unit power supply circuit, wherein, the VCC voltage required by the battery control unit is generated through the control unit power supply circuit based on the 12V voltage of the battery module; the 5V2 voltage and the 5V2A voltage required by the isolated sampling connection unit are provided through the isolated sampling connection unit power supply circuit based on the 12V voltage of the battery module.

8. The power supply management system for multi-battery modules according to claim 7, characterized by: The control unit power supply circuit comprises a control unit power supply chip, wherein, the control unit power supply chip adopts a chip U5 of model TPS70933, the Vin end of the chip U5 is connected with one end of the capacitor C21, one end of the capacitor C22, one end of the resistor R36 and the 12V voltage provided by the battery module, the other end of the capacitor C21, the other end of the capacitor C22, the other end of the resistor R36 and the EA end of the chip U5 are all grounded; the Vout end of the chip U5 is connected with one end of the capacitor C23 and one end of the capacitor C24, and forms a VCC voltage output end, the other end of the capacitor C23 and the other end of the capacitor C24 are both grounded.

9. A power supply management system for a multi-cell module according to any one of claims 2 to 8, characterized in that: The module power supply branch comprises a module power supply diode and a module power supply switch tube, wherein, the positive end of the battery module is connected with the anode end of the module power supply diode, the cathode end of the module power supply diode is connected with the power supply connection end of the master control side through the module power supply switch tube.

10. A power supply management system for a multi-cell module according to any one of claims 2 to 8, characterized by: The adaptive connection between the battery module communication unit and the master control communication module comprises a communication connection based on the RS485 bus, a communication connection based on the one-wire bus or a communication connection based on the CAN bus.

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