Battery voltage deviation detecting and processing device of hybrid power system

Abstract

The utility model belongs to the technical field of hybrid power system battery charging and discharging, and particularly provides a hybrid power system battery voltage deviation detection processing device which comprises a voltage detection module used for detecting the voltage of a hybrid power system battery, a charging and discharging control module, a discharging resistance box and a charger module. The voltage detection module is connected with the charging and discharging control module; the charger module is connected with the hybrid power system battery through the charging switch circuit; the hybrid power system battery is connected with the discharge resistance box through the discharge switch circuit; and the charging switch circuit and the discharging switch circuit are respectively connected with the charging and discharging control module. The charging and discharging control module can compare the data provided by the voltage detection module with the value of the normal range of the battery voltage, and automatically control the opening and closing of the charging switch circuit and the discharging switch circuit according to the comparison result. The processing efficiency is improved, the dependence on manual operation is reduced, and the influence of human factors on the system performance is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of battery charging and discharging in a hybrid power system, and particularly relates to a device for detecting and processing battery voltage deviation in a hybrid power system. Background Art

[0002] The hybrid power system generally uses lithium iron phosphate batteries with a capacity of 8.5 Ah, a rated voltage of 3.2 V, a total of 1080 cells. Every 6 cells are connected in parallel to form 1 basic unit, and 12 units form a battery pack. Then all the battery units are connected in series, with a total of 15 battery packs. The charging and discharging of the batteries are completed by a battery charging and discharging frequency converter. It judges whether to discharge the battery or charge the battery according to the voltage level of the DC bus. Other protection interlock functions, such as controlling the battery charging and discharging according to the battery capacity, are controlled by a PLC according to the signals received from the battery management system (BMS). The internal 1080 cells are divided into 15 battery boxes and the battery packs are connected in series. During the automatic charging and discharging of the batteries, the voltage of the individual cells among the 1080 internal cells may deviate too much due to charging and discharging, or the voltage of the 15 battery packs may also deviate too much, which will trigger a battery voltage deviation fault.

[0003] When the battery bias voltage triggers a battery voltage deviation fault, it requires the manufacturer's personnel to handle it and temporary equipment is needed, which is both time-consuming and increases the cost, and at the same time affects the efficiency and benefit of the equipment. Summary of the Invention

[0004] The utility model provides a device for detecting and processing battery voltage deviation in a hybrid power system, aiming at solving the above problems.

[0005] The technical solution of the utility model provides a device for detecting and processing battery voltage deviation in a hybrid power system, including a voltage detection module for detecting the battery voltage of the hybrid power system, a charge and discharge control module, a discharge resistance box, and a charger module;

[0006] The voltage detection module is connected to the charge and discharge control module;

[0007] The charger module is connected to the hybrid power system battery through a charging switch circuit;

[0008] The hybrid power system battery is connected to the discharge resistance box through a discharge switch circuit;

[0009] The charging switch circuit and the discharge switch circuit are respectively connected to the charge and discharge control module.

[0010] As a preference of the technical solution of the utility model, the charger module includes a voltage regulation unit, a current regulation unit, and a charging control unit;

[0011] The voltage regulation unit and the current regulation unit are respectively connected to the charging control unit;

[0012] The charging control unit is connected to the charge and discharge control module.

[0013] As a preference of the technical solution of the present utility model, the discharge resistor box includes a resistor box body, and a first wiring terminal and a second wiring terminal for connecting to the battery of the hybrid power system are arranged on the resistor box body.

[0014] As a preference of the technical solution of the present utility model, the voltage detection module includes a voltage detection unit and a voltage output unit. The voltage detection unit is connected to both poles of the hybrid power system battery to be measured through a cable clamp, and the voltage detection unit outputs the detected voltage value to the charge and discharge control module through the voltage output unit.

[0015] As a preference of the technical solution of the present utility model, the device further includes a power supply module, and the power supply module is respectively connected to the charging switch circuit, the discharging switch circuit and the charge and discharge control module.

[0016] As a preference of the technical solution of the present utility model, the charging switch circuit includes a first triode and a first MOS tube;

[0017] The charge and discharge control module is connected to the base of the first triode through a first resistor. The emitter of the first triode is connected to the power supply module. The collector of the first triode is connected to the anode of a first light-emitting diode through a second resistor, and the cathode of the first light-emitting diode is grounded; the collector of the first triode is connected to the gate of the first MOS tube through a third resistor. The source of the first MOS tube is grounded. The drain of the first MOS tube is connected to the charger module through a fourth resistor. The drain of the first MOS tube is connected to the anode of a first diode, and the cathode of the first diode is respectively connected to the charger module and the positive electrode of the hybrid power system battery through a fifth resistor; the negative electrode of the hybrid power system battery is connected to the drain of the first MOS tube.

[0018] When the charge and discharge control module outputs a low level, the first triode conducts, so that the gate of the first MOS tube obtains a high level, and the first MOS tube conducts. At this time, the negative electrode and the positive electrode of the power system battery are connected to the charger module, the negative electrode of the power system battery is grounded, and the charger module charges the power system battery. At this time, the first light-emitting diode lights up to indicate the charging state; the first diode is provided to protect the power system battery during charging.

[0019] As a preference of the technical solution of the present utility model, the discharging switch circuit includes a relay and a second triode;

[0020] The charge and discharge control module is connected to the base of the second triode through the sixth resistor. The emitter of the second triode is connected to the power supply module. The emitter of the second triode is also connected to the base of the second triode through the seventh resistor. The collector of the second triode is grounded through the coil of the relay. The common terminal of the relay is connected to the power system battery. The normally open terminal of the relay is connected to the discharge resistor box. The normally closed terminal of the relay is in a high-impedance state.

[0021] As an optimization of the technical solution of the present utility model, the voltage output unit of the voltage detection module is respectively connected to the input terminals of the first comparator and the second comparator;

[0022] The other input terminal of the first comparator is connected to the first reference voltage;

[0023] The other input terminal of the second comparator is connected to the second reference voltage; wherein the first reference voltage is the maximum value within the normal range of the hybrid power system battery voltage, and the second reference voltage is the minimum value within the normal range of the hybrid power system battery voltage;

[0024] The output terminals of the first comparator and the second comparator are respectively connected to the single-chip microcomputer controller;

[0025] The single-chip microcomputer controller is connected to the base of the second triode through the sixth resistor; the single-chip microcomputer controller is connected to the base of the first triode through the first resistor.

[0026] The voltage adjustment range of the charger voltage adjustment unit is 0 - 64V, and the current adjustment range of the current adjustment unit is 0 - 10A; the resistor box has two connection terminals of 5KW150RJ and 5KW200RJ. In this way, the problems of overvoltage, undervoltage, and voltage deviation of the battery pack and individual batteries can be handled by oneself.

[0027] It can be seen from the above technical solutions that the present invention has the following advantages: By using the voltage detection module to monitor the voltage state of the battery pack in real time, the rapid response to the change of the battery voltage is ensured. This real-time performance enables the system to take immediate measures when the battery voltage deviates, avoiding battery damage or system failure caused by delayed processing. At the same time, the high-precision measurement of the voltage detection module ensures the accuracy of the voltage data, providing a reliable basis for subsequent charge and discharge control.

[0028] The charge and discharge control module can compare the data provided by the voltage detection module with the values within the normal range of the battery voltage, and automatically control the opening and closing of the charging switch circuit and the discharging switch circuit according to the comparison result. This improves the processing efficiency, reduces the dependence on manual operation, and decreases the impact of human factors on the system performance. The design of the discharge resistor box can discharge through the resistor to reduce the voltage when the battery pack is overvoltage, effectively preventing safety accidents caused by battery overvoltage. At the same time, the charger module can automatically adjust the output voltage and current during the charging process to ensure the safe and effective charging of the battery. In addition, the entire device adopts standard communication protocols and bus systems, ensuring the accuracy and real-time nature of data transmission, and further improving the safety and reliability of the system. The problem of battery voltage deviation in the hybrid power system can be processed in a timely and effective manner, avoiding equipment downtime or production interruption caused by battery failures. This not only reduces the maintenance cost and time cost, but also improves the attendance rate of the equipment and the production operation efficiency.

[0029] In addition, the design principle of the present invention is reliable and the structure is simple, having a very wide application prospect.

[0030] Thus, compared with the prior art, the present invention has prominent substantive features and significant progress, and the beneficial effects of its implementation are also obvious. Brief Description of the Drawings

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0032] Figure 1 It is a schematic block diagram of the device according to an embodiment of the present invention.

[0033] Figure 2 It is a schematic connection diagram of a comparator in an embodiment of the present invention.

[0034] Figure 3 It is a schematic connection diagram of a comparator in another embodiment of the present invention. Detailed Embodiments

[0035] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] As Figure 1 shown, an embodiment of the present utility model provides a hybrid power system battery voltage deviation detection and processing device, including a voltage detection module for detecting the battery voltage of the hybrid power system, a charge and discharge control module, a discharge resistor box, and a charger module;

[0037] The voltage detection module is connected to the charge and discharge control module;

[0038] The charger module is connected to the hybrid power system battery through a charging switch circuit;

[0039] The hybrid power system battery is connected to the discharge resistor box through a discharge switch circuit;

[0040] The charging switch circuit and the discharge switch circuit are respectively connected to the charge and discharge control module.

[0041] In some embodiments, the charger module includes a voltage regulation unit, a current regulation unit, and a charging control unit;

[0042] The voltage regulation unit and the current regulation unit are respectively connected to the charging control unit;

[0043] The charging control unit is connected to the charge and discharge control module.

[0044] In some embodiments, the discharge resistor box includes a resistor box body, and a first wiring terminal and a second wiring terminal for connecting to the hybrid power system battery are arranged on the resistor box body.

[0045] In some embodiments, the voltage detection module includes a voltage detection unit and a voltage output unit. The voltage detection unit is connected to both poles of the hybrid power system battery to be measured through a cable clamp, and the voltage detection unit outputs the detected voltage value to the charge and discharge control module through the voltage output unit.

[0046] In some embodiments, the device further includes a power supply module, and the power supply module is respectively connected to the charging switch circuit, the discharge switch circuit, and the charge and discharge control module.

[0047] The charging switch circuit includes a first triode and a first MOS tube;

[0048] The charge and discharge control module is connected to the base of the first triode through the first resistor. The emitter of the first triode is connected to the power supply module. The collector of the first triode is connected to the anode of the first light-emitting diode through the second resistor, and the cathode of the first light-emitting diode is grounded. The collector of the first triode is connected to the gate of the first MOS transistor through the third resistor. The source of the first MOS transistor is grounded. The drain of the first MOS transistor is connected to the charger module through the fourth resistor. The drain of the first MOS transistor is connected to the anode of the first diode, and the cathode of the first diode is connected to the positive poles of the charger module and the hybrid system battery through the fifth resistor respectively. The negative pole of the hybrid system battery is connected to the drain of the first MOS transistor.

[0049] When the charge and discharge control module outputs a low level, the first triode conducts, enabling the gate of the first MOS transistor to obtain a high level, and the first MOS transistor conducts. At this time, the negative and positive poles of the power system battery are connected to the charger module, the negative pole of the power system battery is grounded, and the charger module charges the power system battery. At this time, the first light-emitting diode lights up to indicate the charging state. The first diode is provided to protect the power system battery during charging.

[0050] In some embodiments, the discharge switch circuit includes a relay and a second triode;

[0051] The charge and discharge control module is connected to the base of the second triode through the sixth resistor. The emitter of the second triode is connected to the power supply module. The emitter of the second triode is also connected to the base of the second triode through the seventh resistor. The collector of the second triode is grounded through the coil of the relay. The common terminal of the relay is connected to the power system battery. The normally open terminal of the relay is connected to the discharge resistor box, and the normally closed terminal of the relay is in a high-impedance state.

[0052] In some embodiments, as Figure 2 shown, the charge and discharge control module includes a single-chip microcomputer controller, a first comparator, and a second comparator;

[0053] The voltage output unit of the voltage detection module is respectively connected to the first input terminal of the first comparator U1 and the first input terminal of the second comparator U2. The second input terminal of the first comparator U1 is connected to the first reference voltage;

[0054] The second input terminal of the second comparator U2 is connected to the second reference voltage. The first reference voltage is the maximum value within the normal range of the hybrid system battery voltage, and the second reference voltage is the minimum value within the normal range of the hybrid system battery voltage;

[0055] The output terminals of the first comparator and the second comparator are respectively connected to the single-chip microcomputer controller;

[0056] The single-chip microcomputer controller is connected to the base of the second triode through the sixth resistor; the single-chip microcomputer controller is connected to the base of the first triode through the first resistor.

[0057] In the embodiment of the present invention, since there are 15 series-connected battery packs in the battery box, each battery pack includes 12 series-connected basic units, and each basic unit is formed by paralleling 6 batteries;

[0058] The second input terminal of the first comparator U1 is respectively connected to a maximum value within the normal voltage range through a switch button, and the switch buttons here include S11, S12, S13, S14; the maximum value within the normal voltage range is called the maximum reference value; here, the maximum reference value includes the maximum value V11 within the normal voltage range at both ends of the battery box, the maximum value V12 within the normal voltage range at both ends of the battery pack, the maximum value V13 within the normal voltage range at both ends of the basic unit, and the maximum value V14 within the normal voltage range of a single battery;

[0059] The second input terminal of the second comparator is respectively connected to a minimum value within the normal voltage range through a switch button, and the switch buttons here include S21, S22, S23, S24; the minimum value within the normal voltage range is called the minimum reference value; here, the minimum reference value includes the minimum value V21 within the normal voltage range at both ends of the battery box, the minimum value V22 within the normal voltage range at both ends of the battery pack, the minimum value V23 within the normal voltage range at both ends of the basic unit, and the minimum value V24 within the normal voltage range of a single battery;

[0060] The voltage detection module is connected to both poles of the battery box through a cable clamp to obtain the voltage of the battery box, and transmits the detected voltage signal to the first input terminal of the first comparator and the first input terminal of the second comparator respectively. At this time, the second input terminal of the first comparator is connected to the maximum value within the normal voltage range at both ends of the battery box through a switch button, and the second input terminal of the second comparator is connected to the minimum value within the normal voltage range at both ends of the battery box through a switch button. The comparator inputs the comparison result into the single-chip microcomputer controller. When the voltage obtained by connecting both poles of the detected battery box is greater than the maximum value within the normal voltage range at both ends of the battery box, or when the voltage obtained by connecting both poles of the detected battery box is less than the minimum value within the normal voltage range at both ends of the battery box, the voltage detection module is connected to both poles of the battery pack through a cable clamp to obtain the voltage of the battery box, and the comparison is carried out by the above method until a battery with a voltage greater than the maximum value within the normal voltage range of a single battery or a battery with a voltage less than the minimum value within the normal voltage range of a single battery is found. Control the discharge of the battery with a voltage greater than the maximum value within the normal voltage range of a single battery, and control the charging of the battery with a voltage less than the minimum value within the normal voltage range of a single battery.

[0061] In some embodiments, such as Figure 3As shown, the second input terminals of the first comparator are respectively connected to a maximum value within the normal voltage range through a first four-way selector U3, and the second input terminals of the second comparator are respectively connected to a minimum value within the normal voltage range through a second four-way selector U4. The first four-way selector and the second four-way selector are respectively connected to the single-chip microcomputer controller. The specific detection and comparison method is the same as that in the above embodiment.

[0062] The voltage regulation range of the charger voltage regulation unit is 0 - 64V, and the current regulation range of the current regulation unit is 0 - 10A; the resistance box has two connection terminals of 5KW150RJ and 5KW200RJ. In this way, the problems of overvoltage, undervoltage, and voltage deviation of the battery pack and single battery can be handled by oneself.

[0063] Although the present invention has been described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, those of ordinary skill in the art can make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions should all be within the scope of the present invention. / Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered by the protection scope of the present invention.

Claims

1. A hybrid system battery voltage deviation detection and processing device, characterized in that: It includes a voltage detection module for detecting the battery voltage of the hybrid system, a charge and discharge control module, a discharge resistor box and a charger module; The voltage detection module is connected to the charge and discharge control module; The charger module is connected to the hybrid system battery through a charging switch circuit; The hybrid system battery is connected to the discharge resistor box through a discharge switch circuit; The charging switch circuit and the discharging switch circuit are respectively connected to the charging and discharging control modules.

2. The hybrid system battery voltage deviation detection and processing device according to claim 1, characterized in that: The charger module includes a voltage regulating unit, a current regulating unit and a charging control unit; The voltage regulating unit and the current regulating unit are respectively connected to the charging control unit; The charging control unit is connected to the charging and discharging control module.

3. The hybrid system battery voltage deviation detection and processing device according to claim 2, characterized in that: The discharge resistor box comprises a resistor box body, on which a first connection terminal and a second connection terminal for connecting to a hybrid power system battery are arranged.

4. The hybrid system battery voltage deviation detection and processing device according to claim 3, characterized in that: The voltage detection module includes a voltage detection unit and a voltage output unit. The voltage detection unit is connected to the two poles of the hybrid power system battery to be tested through a cable clamp. The voltage detection unit outputs the detected voltage value to the charge and discharge control module through the voltage output unit.

5. The hybrid system battery voltage deviation detection and processing device according to claim 4, characterized in that: The device also includes a power supply module, which is respectively connected to the charging switch circuit, the discharging switch circuit and the charging and discharging control module.

6. The hybrid system battery voltage deviation detection and processing device according to claim 5, characterized in that: The charging switch circuit includes a first triode and a first MOS tube; The charge and discharge control module is connected to the base of the first triode through the first resistor, the emitter of the first triode is connected to the power module, the collector of the first triode is connected to the anode of the first light-emitting diode through the second resistor, and the cathode of the first light-emitting diode is grounded; the collector of the first triode is connected to the gate of the first MOS tube through the third resistor, the source of the first MOS tube is grounded, the drain of the first MOS tube is connected to the charger module through the fourth resistor, the drain of the first MOS tube is connected to the anode of the first diode, and the cathode of the first diode is respectively connected to the charger module and the positive electrode of the hybrid power system battery through the fifth resistor; the negative electrode of the hybrid power system battery is connected to the drain of the first MOS tube.

7. The hybrid system battery voltage deviation detection and processing device according to claim 6, characterized in that: The discharge switch circuit includes a relay and a second triode; The charge and discharge control module is connected to the base of the second transistor through the sixth resistor, the emitter of the second transistor is connected to the power module, the emitter of the second transistor is also connected to the base of the second transistor through the seventh resistor, the collector of the second transistor is grounded through the coil of the relay, the common end of the relay is connected to the power system battery, the normally open end of the relay is connected to the discharge resistor box, and the normally closed end of the relay is in a high-resistance state.

8. The hybrid system battery voltage deviation detection and processing device according to claim 7, characterized in that: The charge and discharge control module includes a single chip microcomputer controller, a first comparator and a second comparator; The voltage output unit of the voltage detection module is connected to the input terminals of the first comparator and the second comparator respectively; The other input terminal of the first comparator is connected to the first reference voltage; The other input terminal of the second comparator is connected to the second reference voltage; The first reference voltage is the maximum value of the normal range of the hybrid system battery voltage, and the second reference voltage is the minimum value of the normal range of the hybrid system battery voltage; The output end of the first comparator and the output end of the second comparator are respectively connected to the single chip controller; The single-chip microcomputer controller is connected to the base of the second transistor through the sixth resistor; the single-chip microcomputer controller is connected to the base of the first transistor through the first resistor.

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