Centralized detector for battery modules

Abstract

The utility model relates to a battery module centralized detector, which is characterized in that a control circuit controls a first power supply to supply power to one or more battery modules and controls a load resistor to discharge the one or more battery modules; wherein the first power supply is used for charging the battery module and supplying power to a control panel of the battery module; the charging of the battery module, the power supply of the control panel of the battery module and the discharging of the battery module by connecting the load resistor are realized; furthermore, the communication circuit is connected with a control panel of the battery module for communication, and the main control circuit is connected with an external upper computer, so that the charging and discharging conditions of the battery module are monitored and controlled in real time, and the state information of the battery module is read; therefore, the first power supply is used for independently supplying power to the control panel of the battery module, the battery module is charged and discharged to realize electric quantity balance, the state information of the battery module is read, and the intelligent degree is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery module management circuits, and more specifically to a battery module centralized detector. Background Art

[0002] The electric energy storage system is composed of multiple battery cells connected in series or in parallel to form a battery module, which is then connected in series to form a battery cluster, and then multiple battery clusters form a battery stack. Therefore, each battery cluster or battery stack system has a large number of battery cells. Any abnormality in a battery cell may affect the normal operation of the energy storage system; therefore, monitoring the status of each battery cell in the battery module is of great significance to the stable operation of the energy storage system. Utility Model Content

[0003] The technical problem to be solved by the utility model is that, in view of the above-mentioned defects of the prior art, a battery module centralized detector is provided to ensure that each battery module is in a normal collection and balanced state before assembly, thereby ensuring the normal operation of the battery cluster or battery stack system, avoiding the trouble of disassembling and repairing abnormal battery modules on the overall container system, and improving production efficiency.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A battery module centralized detector is constructed, comprising a communication circuit and a control circuit; wherein the communication circuit and the control circuit are both connected to a main control circuit, and the main control circuit is connected to an external host computer;

[0006] The control circuit controls the first power supply to charge one or more battery modules and to supply power to the control board of the battery module, and controls the load resistor to discharge one or more battery modules; the first power supply is connected to the control circuit, and the battery module and the load resistor are also connected to the control circuit;

[0007] The communication circuit is connected to the control board of one or more battery modules for communication.

[0008] The battery module centralized detector of the utility model, wherein the control circuit further controls the second power supply to supply power to the cooling fan of one or more battery modules;

[0009] The second power supply is connected to the control circuit.

[0010] The battery module centralized detector of the utility model is characterized in that the main control circuit is connected to an external host computer via a USB bus.

[0011] In the battery module centralized detector described in the utility model, the communication circuit is a CAN bus communication circuit and performs isolated communication with the main control circuit.

[0012] The battery module centralized detector described in the utility model, wherein the main control circuit includes a single-chip microcomputer, and the model of the single-chip microcomputer is GD32F303VCT6.

[0013] The battery module centralized detector described in the utility model, wherein the communication circuit includes: a CAN transceiver and a digital isolator;

[0014] The VDD1 terminal of the digital isolator is connected to the positive electrode of the first power supply and the GND1 terminal is grounded, the VDD2 terminal of the digital isolator is connected to the positive electrode of the second power supply and the GND2 terminal is connected to the negative electrode of the second power supply;

[0015] The DI1 and DO4 terminals of the digital isolator are connected one-to-one with the PB9 and PB8 terminals of the single-chip microcomputer, and the DO1 and DI4 terminals of the digital isolator are connected one-to-one with the TXD and RXD terminals of the CAN transceiver;

[0016] The VDD terminal of the CAN transceiver is connected to the positive electrode of the second power supply, and the VSS terminal and the RS terminal are both connected to the negative electrode of the second power supply, the CANH terminal and the CANL terminal of the CAN transceiver are connected one-to-one with the 1st pin and the 4th pin of the common mode inductor and are also connected in parallel with the first resistor, and the 2nd pin and the 3rd pin of the CAN transceiver are connected to one or more of the battery modules for communication;

[0017] The CANH terminal and the CANL terminal of the CAN transceiver are also connected one-to-one with the 2nd pin and the 1st pin of the electrostatic and surge protection tube, and the 3rd pin of the electrostatic and surge protection tube is connected with the negative electrode of the second power supply.

[0018] The battery module centralized detector of the utility model, wherein the control circuit comprises a plurality of sub-control circuits, and the sub-control circuits comprise: a relay, a diode and a triode;

[0019] The base of the transistor is connected to a second resistor and a third resistor, the other end of the second resistor is the control end of the sub-control circuit, the other end of the third resistor is grounded and connected to the emitter of the transistor, the collector of the transistor is connected to the anode of the diode and the first end of the coil of the relay, and the cathode of the diode and the second end of the coil of the relay are both connected to the anode of the third power supply;

[0020] The plurality of sub-control circuits at least include: a first sub-control circuit, a second sub-control circuit and a third sub-control circuit, and the control end of the first sub-control circuit, the control end of the second sub-control circuit and the control end of the third sub-control circuit are connected one-to-one with the remaining unused I / O ports of the single-chip microcomputer;

[0021] The common terminal of the relay of the first sub-control circuit is connected to the live wire of the 220V AC mains power and the normally open terminal is connected to the positive pole of the first power supply, and the negative pole of the first power supply is connected to the neutral wire of the 220V AC mains power; the positive output terminal and the negative output terminal of the first power supply are connected to the positive power terminal and the negative power terminal of the battery module in a one-to-one correspondence;

[0022] The common end of the relay of the second sub-control circuit is connected to the first end of the load resistor and the normally open end is connected to the positive power terminal of the battery module, and the second end of the load resistor is connected to the negative power terminal of the battery module;

[0023] The common end of the relay of the third sub-control circuit is connected to the live wire of the 220V AC mains and the normally open end is connected to the positive power pole of the second power supply, and the negative power pole of the second power supply is connected to the neutral wire of the 220V AC mains; the positive output end and the negative output end of the second power supply are connected one-to-one with the positive power pole and the negative power pole of the cooling fan of the battery module.

[0024] The battery module centralized detector described in the utility model, wherein the PA12 terminal and the PA11 terminal of the single-chip computer are connected one-to-one with the D+ terminal and the D- terminal of the USB socket in sequence, the VBUS terminal of the USB socket is connected to the positive pole of the third power supply and the GND0 terminal is grounded, and the USB socket is connected to the host computer.

[0025] In the battery module centralized detector described in the utility model, the second power supply is isolated from the first power supply and the third power supply.

[0026] The beneficial effects of the utility model are as follows: the control circuit controls the first power supply to supply power to one or more battery modules, and controls the load resistor to discharge one or more battery modules; wherein the first power supply charges the battery module and supplies power to the control board of the battery module; the charging of the battery module, the supply of power to the control board of the battery module, and the discharge of the battery module by connecting the load resistor are realized;

[0027] Furthermore, the communication circuit is connected to the control board of the battery module for communication, and the main control circuit is connected to an external host computer to achieve real-time monitoring and control of the charging and discharging conditions of the battery module and read the status information of the battery module;

[0028] This makes it possible to use the first power supply to independently power the control board of the battery module, to charge and discharge the battery module to achieve power balance, and to read the status information of the battery module. In addition, the host computer can also perform real-time monitoring and control, which greatly improves the degree of intelligence. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work:

[0030] Figure 1 This is a circuit schematic diagram of the main control circuit of the battery module centralized detector of the preferred embodiment of the utility model;

[0031] Figure 2 This is a circuit schematic diagram of a digital isolator of a battery module centralized detector of a preferred embodiment of the utility model;

[0032] Figure 3 This is a circuit schematic diagram of a CAN transceiver of a battery module centralized detector of a preferred embodiment of the utility model;

[0033] Figure 4 It is a circuit schematic diagram of a sub-control circuit of a battery module centralized detector of a preferred embodiment of the utility model;

[0034] Figure 5 It is a circuit schematic diagram of the USB female socket of the battery module centralized detector of the preferred embodiment of the utility model. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the following will be described clearly and completely in combination with the technical solution in the embodiments of the utility model. Obviously, the described embodiments are partial embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0036] The battery module centralized detector of the preferred embodiment of the utility model is as follows Figure 1 See also Figures 2 to 5 ; including a communication circuit and a control circuit; wherein the communication circuit and the control circuit are connected to the main control circuit 100, and the main control circuit 100 is connected to an external host computer;

[0037] The control circuit controls the first power supply (not shown in the figure) to charge one or more battery modules (not shown in the figure) and to supply power to the control board of the battery module (to supply power to the control board of the battery module to read status information when the battery cell of the battery module fails), and controls the load resistor (not shown in the figure) to discharge one or more battery modules; the first power supply is connected to the control circuit, and the battery module and the load resistor are also connected to the control circuit; wherein the control board of the battery module can also control the charging or discharging of any one or more battery cells to achieve power balance and precise voltage regulation, and the battery module is composed of a plurality of battery cells connected in series or in parallel, a control board, and a cooling fan;

[0038] The communication circuit is connected to the control board of one or more battery modules for communication; and realizes reading the status information of the battery modules;

[0039] The control circuit controls the first power supply to supply power to one or more battery modules, and controls the load resistor to discharge one or more battery modules; wherein the first power supply charges the battery module and supplies power to the control board of the battery module; the charging of the battery module, the supply of power to the control board of the battery module, and the discharge of the battery module by connecting the load resistor are realized;

[0040] Furthermore, the communication circuit is connected to the control board of the battery module for communication, and the main control circuit 100 is connected to an external host computer to achieve real-time monitoring and control of the charging and discharging conditions of the battery module and read the status information of the battery module;

[0041] This makes it possible to use the first power supply to independently power the control board of the battery module, to charge and discharge the battery module to achieve power balance, and to read the status information of the battery module. In addition, the host computer can also perform real-time monitoring and control, which greatly improves the degree of intelligence.

[0042] like Figure 4 As shown, the control circuit also controls a second power supply (not shown) to supply power to a cooling fan of one or more battery modules;

[0043] The second power supply is connected to the control circuit; the heat dissipation of the battery module can be realized even when the battery cell of the battery module fails; wherein the first power supply outputs 24V DC power, and the second power supply outputs 48V DC power;

[0044] like Figure 1 As shown, the main control circuit 100 is connected to an external host computer via a USB bus; it is easy to use.

[0045] like Figures 1 to 3As shown, the communication circuit is a CAN bus communication circuit and communicates with the main control circuit 100 in isolation; it provides stability and realizes one-to-many communication.

[0046] like Figure 1 As shown, the main control circuit 100 includes single-chip microcomputers U4A and U4B, and the model of the single-chip microcomputers U4A and U4B is GD32F303VCT6; low cost and small size, wherein the main control circuit 100 also includes a flash memory U5 connected to the single-chip microcomputers U4A and U4B to store the status information of the battery module and related control programs to meet different usage requirements;

[0047] Among them, the / CS terminal, SO terminal, CLK terminal and DI terminal of the flash memory U5 are connected one-to-one with the PA15 terminal, PB4 terminal, PB3 terminal and PB5 terminal of the microcontrollers U4A and U4B in sequence.

[0048] like Figures 1 to 3 As shown, the communication circuit includes: a CAN transceiver U2 and a digital isolator U3;

[0049] The VDD1 terminal of the digital isolator U3 is connected to the positive electrode of the first power supply and the GND1 terminal is grounded, the VDD2 terminal of the digital isolator U3 is connected to the positive electrode of the second power supply and the GND2 terminal is connected to the negative electrode of the second power supply;

[0050] The DI1 and DO4 terminals of the digital isolator U3 are connected one-to-one with the PB9 and PB8 terminals of the microcontrollers U4A and U4B, and the DO1 and DI4 terminals of the digital isolator U3 are connected one-to-one with the TXD and RXD terminals of the CAN transceiver U2;

[0051] The VDD terminal of the CAN transceiver U2 is connected to the positive electrode of the second power supply, and the VSS terminal and the RS terminal are both connected to the negative electrode of the second power supply, the CANH terminal and the CANL terminal of the CAN transceiver U2 are connected one-to-one with the 1st pin and the 4th pin of the common mode inductor L2, and are also connected in parallel with the first resistor R3, and the 2nd pin and the 3rd pin of the common mode inductor L2 are connected to one or more battery modules for communication;

[0052] The CANH and CANL terminals of the CAN transceiver U2 are also connected one-to-one to pins 2 and 1 of the electrostatic and surge protection tube, and pin 3 of the electrostatic and surge protection tube is connected to the negative pole of the second power supply; the electrostatic and surge protection tube is set to further improve the stability of the circuit; among them, the model of the CAN transceiver U2 is TJA1050T or SN65HVD1050DR.

[0053] like Figures 1 to 4 As shown, the control circuit includes a plurality of sub-control circuits 200, and the sub-control circuit 200 includes: a relay RELAY1, a diode D2, and a transistor Q1;

[0054] The base of the transistor Q1 is connected to a second resistor R13 and a third resistor R15, the other end of the second resistor R13 is the control end of the sub-control circuit 200, the other end of the third resistor R15 is grounded and connected to the emitter of the transistor Q1, the collector of the transistor Q1 is connected to the anode of the diode D2 and the first end of the coil of the relay RELAY1, the cathode of the diode D2 and the second end of the coil of the relay RELAY1 are both connected to the anode of the third power supply;

[0055] The multiple sub-control circuits 200 at least include: a first sub-control circuit 200, a second sub-control circuit 200 and a third sub-control circuit 200, and the control end of the first sub-control circuit 200, the control end of the second sub-control circuit 200 and the control end of the third sub-control circuit 200 are connected one-to-one with the remaining unused multiple I / O ports of the single-chip microcomputers U4A and U4B;

[0056] The common terminal of the relay RELAY1 of the first sub-control circuit 200 is connected to the live wire of the 220V AC mains and the normally open terminal is connected to the positive pole of the first power supply, and the negative pole of the first power supply is connected to the neutral wire of the 220V AC mains; the positive output terminal and the negative output terminal of the first power supply are connected to the positive power terminal and the negative power terminal of the battery module (or multiple battery modules) in a one-to-one correspondence, and are also connected to the positive power terminal and the negative power terminal of the control board of the battery module in a one-to-one correspondence;

[0057] The common end of the relay RELAY1 of the second sub-control circuit 200 is connected to the first end of the load resistor and the normally open end is connected to the positive power supply terminal of the battery module (or multiple battery modules), and the second end of the load resistor is connected to the negative power supply terminal of the battery module (or multiple battery modules); wherein the first sub-control circuit 200 and the second sub-control circuit 200 work in an interlocked state to realize the charge or discharge of one or more battery modules to achieve power balance;

[0058] The common end of the relay RELAY1 of the third sub-control circuit 200 is connected to the live wire of the 220V AC mains and the normally open end is connected to the positive power pole of the second power supply, and the negative power pole of the second power supply is connected to the neutral wire of the 220V AC mains; the positive output end and the negative output end of the second power supply are connected one-to-one with the positive power pole and the negative power pole of the cooling fan of the battery module (or multiple battery modules).

[0059] like Figures 1 to 5As shown, the PA12 and PA11 terminals of the single-chip computers U4A and U4B are connected one-to-one with the D+ and D- terminals of the USB socket J2 in sequence, the VBUS terminal of the USB socket J2 is connected to the positive pole of the third power supply and the GND0 terminal is grounded, and the USB socket J2 is connected to the host computer; wherein, a USB data cable is inserted to connect the USB socket J2 to the host computer, which has strong versatility and is easy to use.

[0060] like Figures 1 to 4 As shown, the second power supply is isolated from the first power supply and the third power supply, wherein the first power supply is a 3.3V DC power supply obtained by stepping down the third power supply, the third power supply is a 5V DC power supply, and the second power supply is also a 5V DC power supply and obtained by isolating the third power supply; the stability of the circuit is improved; further, the microcontrollers U4A and U4B are also connected to the first power supply.

[0061] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.

Claims

1. A battery module centralized detector, comprising a communication circuit and a control circuit; characterized in that: The communication circuit and the control circuit are both connected to a main control circuit, and the main control circuit is connected to an external host computer; The control circuit controls the first power supply to charge one or more battery modules and to supply power to the control board of the battery module, and controls the load resistor to discharge one or more battery modules; the first power supply is connected to the control circuit, and the battery module and the load resistor are also connected to the control circuit; The communication circuit is connected to the control board of one or more battery modules for communication.

2. The battery module centralized detector according to claim 1, characterized in that: The control circuit also controls the second power supply to supply power to the cooling fan of one or more battery modules; The second power supply is connected to the control circuit.

3. The battery module centralized detector according to claim 1, characterized in that: The main control circuit is connected to an external host computer via a USB bus.

4. The battery module centralized detector according to claim 1, characterized in that: The communication circuit is a CAN bus communication circuit and performs isolated communication with the main control circuit.

5. The battery module centralized detector according to claim 1, characterized in that: The main control circuit includes a single chip microcomputer, and the model of the single chip microcomputer is GD32F303VCT6.

6. The battery module centralized detector according to claim 5, characterized in that: The communication circuit includes: a CAN transceiver and a digital isolator; The VDD1 terminal of the digital isolator is connected to the positive electrode of the first power supply and the GND1 terminal is grounded, the VDD2 terminal of the digital isolator is connected to the positive electrode of the second power supply and the GND2 terminal is connected to the negative electrode of the second power supply; The DI1 and DO4 terminals of the digital isolator are connected one-to-one with the PB9 and PB8 terminals of the single-chip microcomputer, and the DO1 and DI4 terminals of the digital isolator are connected one-to-one with the TXD and RXD terminals of the CAN transceiver; The VDD terminal of the CAN transceiver is connected to the positive electrode of the second power supply, and the VSS terminal and the RS terminal are both connected to the negative electrode of the second power supply, the CANH terminal and the CANL terminal of the CAN transceiver are connected one-to-one with the 1st pin and the 4th pin of the common mode inductor and are also connected in parallel with a first resistor, and the 2nd pin and the 3rd pin of the common mode inductor are connected to one or more of the battery modules for communication; The CANH terminal and the CANL terminal of the CAN transceiver are also connected one-to-one with the 2nd pin and the 1st pin of the electrostatic and surge protection tube, and the 3rd pin of the electrostatic and surge protection tube is connected with the negative electrode of the second power supply.

7. The battery module centralized detector according to claim 6, characterized in that: The control circuit includes a plurality of sub-control circuits, and the sub-control circuits include: a relay, a diode and a triode; The base of the transistor is connected to a second resistor and a third resistor, the other end of the second resistor is the control end of the sub-control circuit, the other end of the third resistor is grounded and connected to the emitter of the transistor, the collector of the transistor is connected to the anode of the diode and the first end of the coil of the relay, and the cathode of the diode and the second end of the coil of the relay are both connected to the anode of the third power supply; The plurality of sub-control circuits at least include: a first sub-control circuit, a second sub-control circuit and a third sub-control circuit, and the control end of the first sub-control circuit, the control end of the second sub-control circuit and the control end of the third sub-control circuit are connected one-to-one with the remaining unused I / O ports of the single-chip microcomputer; The common terminal of the relay of the first sub-control circuit is connected to the live wire of the 220V AC mains power and the normally open terminal is connected to the positive pole of the first power supply, and the negative pole of the first power supply is connected to the neutral wire of the 220V AC mains power; the positive output terminal and the negative output terminal of the first power supply are connected to the positive power terminal and the negative power terminal of the battery module in a one-to-one correspondence; The common end of the relay of the second sub-control circuit is connected to the first end of the load resistor and the normally open end is connected to the positive power terminal of the battery module, and the second end of the load resistor is connected to the negative power terminal of the battery module; The common end of the relay of the third sub-control circuit is connected to the live wire of the 220V AC mains and the normally open end is connected to the positive power pole of the second power supply, and the negative power pole of the second power supply is connected to the neutral wire of the 220V AC mains; the positive output end and the negative output end of the second power supply are connected one-to-one with the positive power pole and the negative power pole of the cooling fan of the battery module.

8. The battery module centralized detector according to claim 7, characterized in that: The PA12 and PA11 terminals of the single-chip microcomputer are connected one-to-one with the D+ and D- terminals of the USB socket in sequence, the VBUS terminal of the USB socket is connected to the positive pole of the third power supply and the GND0 terminal is grounded, and the USB socket is connected to the host computer.

9. The battery module centralized detector according to claim 7, characterized in that: The second power supply is isolated from the first power supply and the third power supply.

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