Multi-battery electrical change self-detection system
By combining multiple battery modules and detection modules, intelligent voltage detection and protection of multiple battery packs are achieved, solving the problems of high cost and single detection method in existing technologies, and improving detection safety and efficiency.
Patent Information
- Application Number
- CN202511474135.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-15
- Publication Date
- 2025-11-18
AI Technical Summary
In the existing technology, the number of battery monitoring chips required for multi-battery monitoring circuits increases with the number of individual batteries, resulting in high costs. Furthermore, the detection method is singular and cannot perform self-detection based on voltage fluctuations.
It adopts a combination of multi-battery modules, detection and control modules, voltage detection modules, voltage change detection modules and fault detection modules. Through the micro-control module, voltage detection and voltage change rate detection are controlled to realize intelligent detection and protection of overvoltage, undervoltage and voltage change rate of multi-battery packs.
It improves the safety and efficiency of battery testing, reduces testing costs, increases power testing methods, and enables intelligent management and maintenance of multiple battery packs.
Smart Images
Figure CN120972014A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of battery detection, and particularly relates to a multi-battery electric change self-detection system. BACKGROUND
[0002] A battery can provide direct-current power required for work of an electrical equipment. In order to improve the voltage of the battery, a plurality of single batteries are connected. In order to intelligently manage and maintain the multi-battery composed of the plurality of single batteries, a battery monitoring circuit composed of a plurality of voltage monitoring chips is generally used to monitor and process each single battery. The required battery monitoring chip increases with the increase of the number of single batteries, which leads to high battery monitoring cost. The battery monitoring circuit detects voltage according to a set overvoltage threshold or an under-voltage threshold, and cannot perform voltage self-detection according to voltage fluctuation state. The detection method is single, and thus needs to be improved. SUMMARY
[0003] The embodiment of the present application provides a multi-battery electric change self-detection system to solve the problems in the background art.
[0004] According to the embodiment of the present application, a multi-battery electric change self-detection system is provided, which comprises: A multi-battery module is used to control a first battery group, a second battery group and a third battery group to perform series energy storage and discharge. A detection control module is connected with the multi-battery module and a voltage detection module, and is used to transmit first electric energy provided by the first battery group, the second battery group and the third battery group in series, second electric energy provided by the first battery group alone, third electric energy provided by the second battery group alone or fourth electric energy provided by the third battery group alone to the voltage detection module. The voltage detection module is used to perform differential amplification and voltage following processing on the first electric energy, the second electric energy, the third electric energy or the fourth electric energy and output a first detection signal. A change detection module is connected with the voltage detection module and the multi-battery module, and is used to perform voltage change rate detection on the first detection signal and absolute value processing on the detected signal. When the processed signal is greater than a set first change threshold, a second detection signal is output. When the processed signal is greater than a set second change threshold, a third detection signal is output and the first battery group, the second battery group and the third battery group are disconnected. The fault detection module is connected with the voltage detection module, the multi-battery module and the micro-control module, and is used for outputting a fourth detection signal and controlling the first battery pack, the second battery pack and the third battery pack to be disconnected when the micro-control module controls the detection control module to perform series voltage detection and the first detection signal is greater than a set first overvoltage threshold value or smaller than a first undervoltage threshold value; and outputting the fourth detection signal when the micro-control module controls the detection control module to perform individual voltage detection on the multi-battery module and the first detection signal is greater than a set second overvoltage threshold value or smaller than a second undervoltage threshold value; The micro-control module is connected with the detection control module, the voltage detection module and the change detection module, and is used for controlling the detection control module to transmit the first electric energy and receive the first detection signal, and when the second detection signal or the third detection signal is received, controlling the detection control module to stop transmitting the first electric energy and controlling the detection control module to sequentially transmit the second electric energy, the third electric energy and the fourth electric energy at the same timing time, and receiving the fourth detection signal.
[0005] As a further scheme of the present application, the multi-battery module comprises an electric energy port, a first battery pack, a first resistor, a first thyristor, a second battery pack, a second thyristor, a third battery pack and a first switch tube. Preferably, the first end of the electric energy port is connected with the first end of the first battery pack and connected with the control end of the first thyristor, the control end of the second thyristor and the collector of the first switch tube through the first resistor, the second end of the first battery pack is connected with one end of the first thyristor, the other end of the first thyristor is connected with the first end of the second battery pack, the second end of the second battery pack is connected with one end of the second thyristor, the other end of the second thyristor is connected with the first end of the third battery pack, the second end of the third battery pack is connected with the second end of the electric energy port, the base of the first switch tube is connected with the fault detection module, and the emitter of the first switch tube is grounded.
[0006] As a further scheme of the present application, the detection control module comprises a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a third thyristor, a fourth thyristor, a fifth thyristor, a sixth thyristor, a seventh thyristor, an eighth thyristor, a first diode, a second diode, a third diode and a fourth diode; and the micro-control module comprises a first controller. Preferably, one end of the third thyristor is connected to the second end of the first battery pack through a second resistor, the other end of the third thyristor is connected to the first end of the fourth thyristor and one end of the seventh thyristor, the second end of the fourth thyristor is connected to the second end of the second battery pack through a fourth resistor, the anode of the sixth thyristor is connected to the first end of the second battery pack through a third resistor, the cathode of the sixth thyristor is connected to the cathode of the eighth thyristor and the cathode of the fifth thyristor, the anode of the fifth thyristor is connected to the first end of the third battery pack through a fifth resistor, the other end of the seventh thyristor is connected to the second end of the third battery pack through a sixth resistor, the anode of the eighth thyristor is connected to the first end of the first battery pack through a seventh resistor, the control end of the eighth thyristor is connected to the cathode of the fourth diode and the cathode of the third diode, the anode of the fourth diode is connected to the control end of the third thyristor and the IO2 end of the first controller, the anode of the third diode is connected to the anode of the second diode and the IO1 end of the first controller, the cathode of the second diode is connected to the control end of the seventh thyristor and the cathode of the first diode, the anode of the first diode is connected to the control end of the fifth thyristor and the IO4 end of the first controller, the control end of the sixth thyristor is connected to the control end of the fourth thyristor and the IO3 end of the first controller, and the anode of the fourth diode is connected to the control end of the third thyristor and the IO2 end of the first controller.
[0007] As a further scheme of the present application, the voltage detection module comprises a first capacitor, an eighth resistor, a first operational amplifier, a ninth resistor and a second operational amplifier. Preferably, one end of the first capacitor is connected to the cathode of the eighth thyristor and the non-inverting terminal of the first operational amplifier, the other end of the first capacitor is connected to the ground through the eighth resistor, the inverting terminal of the first operational amplifier is connected to the first end of the fourth thyristor and the output terminal of the first operational amplifier is connected to the non-inverting terminal of the second operational amplifier through the ninth resistor, the inverting terminal of the second operational amplifier is connected to the IO5 end of the first controller, the output terminal of the second operational amplifier and the fault detection module.
[0008] As a further scheme of the present application, the change detection module comprises a tenth resistor, an eleventh resistor, a fourth operational amplifier, a third operational amplifier, a second capacitor, a twelfth resistor and an absolute value device. Preferably, the inverting terminal of the fourth operational amplifier is connected to one end of the eleventh resistor and the output terminal of the second operational amplifier through the tenth resistor, the other end of the eleventh resistor is connected to the output terminal of the third operational amplifier and the inverting terminal of the third operational amplifier is connected to one end of the twelfth resistor through the second capacitor, the other end of the twelfth resistor is connected to the output terminal of the fourth operational amplifier and the input terminal of the absolute value device, and the non-inverting terminal of the fourth operational amplifier and the non-inverting terminal of the third operational amplifier are both connected to the ground.
[0009] As a further scheme of the present application, the change detection module further comprises a first comparator, a second comparator, a first reference power supply, a second reference power supply and a self-locking device. Preferably, the non-inverting terminal of the first comparator is connected to the non-inverting terminal of the second comparator and the output terminal of the absolute value device, the inverting terminals of the first and second comparators are connected to the first and second reference power sources respectively, the output terminal of the first comparator is connected to the IO6 terminal of the first controller, the output terminal of the second comparator is connected to the IO7 terminal of the first controller and the input terminal of the self-locking device, and the output terminal of the self-locking device is connected to the base of the first switch tube.
[0010] As a further scheme of the application, the fault detection module comprises a third comparator, a fourth comparator, a ninth thyristor, a tenth thyristor, an eleventh thyristor, a twelfth thyristor, a fifth diode, a sixth diode, a seventh diode, a third reference power source, a fourth reference power source, a fifth reference power source, a sixth reference power source and an eighth diode. Preferably, the non-inverting terminal of the third comparator is connected to the inverting terminal of the fourth comparator and the output terminal of the second operational amplifier, the inverting terminal of the third comparator is connected to the cathode of the ninth thyristor and the cathode of the eleventh thyristor, the non-inverting terminal of the fourth comparator is connected to the cathode of the tenth thyristor and the cathode of the twelfth thyristor, the anodes of the ninth, eleventh, tenth and twelfth thyristors are connected to the third, fourth, fifth and sixth reference power sources respectively, the control terminal of the ninth thyristor is connected to the control terminal of the tenth thyristor and the IO1 terminal of the first controller, the cathode of the eleventh thyristor is connected to the cathodes of the twelfth thyristor, fifth diode, sixth diode and seventh diode, the anodes of the fifth, sixth and seventh diodes are connected to the IO2, IO3 and IO4 terminals of the first controller respectively, the output terminals of the third and fourth comparators are connected to the IO8 terminal of the first controller and the anode of the eighth diode, and the cathode of the eighth diode is connected to the base of the first switch tube.
[0011] Compared with the prior art, the beneficial effects of the present application are that the multi-battery electric change self-detection system can control the voltage detection module to detect the total voltage of the first battery pack, the second battery pack and the third battery pack connected in series in the multi-battery module by the micro-control module, cooperate with the voltage change rate detection module to detect the voltage change rate, and then judge the voltage mutation of the multi-battery module. When the voltage change rate is greater than the first change threshold value, the micro-control module will control the detection control module to switch the signal transmission path, so that the voltage change module and the change detection module detect the voltage and the voltage change rate of the first battery pack, the second battery pack and the third battery pack in turn. The overvoltage threshold value or the undervoltage threshold value required for detection can be changed by the fault detection module according to the power transmission state of the detection control module, so as to realize overvoltage and undervoltage detection processing of the first battery pack, the second battery pack and the third battery pack in series, the first battery pack alone, the second battery pack alone or the third battery pack alone. When overvoltage, undervoltage or voltage change rate greater than the second change threshold value occurs, the multi-battery module is protected, the detection safety is improved, the power detection means of the multi-battery module is increased, and the battery detection efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS
[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0013] Figure 1 A principle block diagram of a multi-battery electric change self-detection system provided by the embodiments of the present application.
[0014] Figure 2 A circuit diagram of a multi-battery electric change self-detection system provided by the embodiments of the present application.
[0015] Figure 3 A circuit diagram of a fault detection module provided by the embodiments of the present application. DETAILED DESCRIPTION
[0016] The technical solutions of the embodiments of the present application will be described clearly and completely in the following description of the embodiments of the present application combined with the drawings. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0017] In one embodiment, referring to Figure 1 A multi-battery electric change self-detection system, comprising: A plurality of battery modules 1 are used to control the first battery pack, the second battery pack and the third battery pack to store and discharge energy in series; A detection control module 2 is connected with the plurality of battery modules 1 and the voltage detection module 3, and is used to transmit the first electric energy provided by the first battery pack, the second battery pack and the third battery pack in series, the second electric energy provided by the first battery pack alone, the third electric energy provided by the second battery pack alone or the fourth electric energy provided by the third battery pack alone to the voltage detection module 3; The voltage detection module 3 is used to perform differential amplification and voltage following processing on the first electric energy, the second electric energy, the third electric energy or the fourth electric energy and output a first detection signal; A change detection module 4 is connected with the voltage detection module 3 and the plurality of battery modules 1, and is used to perform voltage change rate detection on the first detection signal and absolute value processing on the detected signal, output a second detection signal when the processed signal is greater than a set first change threshold, and output a third detection signal and control the first battery pack, the second battery pack and the third battery pack to be disconnected when the processed signal is greater than a set second change threshold; A fault detection module 5 is connected with the voltage detection module 3, the plurality of battery modules 1 and a micro control module 6, and is used to output a fourth detection signal and control the first battery pack, the second battery pack and the third battery pack to be disconnected when the micro control module 6 controls the detection control module 2 to perform series voltage detection and the first detection signal is greater than a set first overvoltage threshold or less than a first undervoltage threshold, and output the fourth detection signal when the micro control module 6 controls the detection control module 2 to perform individual voltage detection on the plurality of battery modules 1 and the first detection signal is greater than a set second overvoltage threshold or less than a second undervoltage threshold; The micro control module 6 is connected with the detection control module 2, the voltage detection module 3 and the change detection module 4, and is used to control the detection control module 2 to transmit the first electric energy and receive the first detection signal, control the detection control module 2 to stop transmitting the first electric energy when the second detection signal or the third detection signal is received, and control the detection control module 2 to sequentially transmit the second electric energy, the third electric energy and the fourth electric energy at the same timing time, and receive the fourth detection signal.
[0018] In a specific embodiment, the above-mentioned multi-battery module 1 can adopt a multi-battery circuit composed of a battery pack, a thyristor, a triode, and an electric energy port, and the battery pack can be connected in series under control, where the battery pack can be selected from a first battery pack, a second battery pack, and a third battery pack; the above-mentioned detection control module 2 can adopt a detection control circuit composed of a thyristor, a resistor, and a diode, and can perform voltage division processing on the first battery pack, the second battery pack, and the third battery pack respectively, control the transmission path of electric energy, and then transmit the first electric energy provided by the first battery pack, the second battery pack, and the third battery pack in series, the second electric energy provided by the first battery pack alone, the third electric energy provided by the second battery pack alone, or the fourth electric energy provided by the third battery pack alone to the voltage detection module 3; the above-mentioned voltage detection module 3 can adopt a voltage detection circuit composed of an operational amplifier, a resistor, and a capacitor, and can perform differential amplification and voltage following processing on the input signal; the above-mentioned change detection module 4 can adopt a change detection circuit composed of an operational amplifier, a resistor, a reference power supply, a capacitor, a comparator, and an absolute value device, and can perform differential processing on the input signal and detect the voltage change rate of the input signal, perform absolute value processing on the voltage change rate in a negative state, and perform voltage comparison processing on the processed signal with a set first change threshold value and a second change threshold value respectively, and output a high-level self-locking signal when the voltage is greater than the second voltage threshold value, where the first change threshold value is less than the second change threshold value, and the second change threshold value is at least the voltage of a battery pack; the above-mentioned fault detection module 5 can adopt a fault detection circuit composed of a comparator, a thyristor, and a reference power supply, and can set the overvoltage threshold value and the undervoltage threshold value required by the battery pack in series, set the overvoltage threshold value and the undervoltage threshold value of a single battery pack, i.e., the first battery pack, the second battery pack, or the third battery pack, and perform overvoltage or undervoltage detection; the above-mentioned micro-control module 6 can adopt a micro-control circuit composed of a single-chip microcomputer, which integrates an operator, a controller, a memory, and an input-output device, and realizes signal processing, data storage, module control, timing control, and other functions.
[0019] In another embodiment, please refer to Figure 1 , Figure 2 and Figure 3 , the multi-battery module 1 includes an electric energy port, a first battery pack, a first resistor R1, a first thyristor S1, a second battery pack, a second thyristor S2, a third battery pack, and a first switch tube V1; Specifically, the first end of the electric energy port is connected with the first end of the first battery group and connected with the control end of the first thyristor S1, the control end of the second thyristor S2 and the collector of the first switch tube V1 through the first resistor R1, the second end of the first battery group is connected with one end of the first thyristor S1, the other end of the first thyristor S1 is connected with the first end of the second battery group, the second end of the second battery group is connected with one end of the second thyristor S2, the other end of the second thyristor S2 is connected with the first end of the third battery group, the second end of the third battery group is connected with the second end of the electric energy port, the base of the first switch tube V1 is connected with the fault detection module 5, and the emitter of the first switch tube V1 is grounded.
[0020] In specific embodiments, the first thyristor S1, the second thyristor S2 and the third thyristor S3 can be bidirectional thyristors, the first battery group, the second battery group and the third battery group can be lithium batteries, and the number of batteries in the battery groups is the same, and the first switch tube V1 can be an NPN triode.
[0021] Further, the detection control module 2 includes a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a third thyristor S3, a fourth thyristor S4, a fifth thyristor S5, a sixth thyristor S6, a seventh thyristor S7, an eighth thyristor S8, a first diode D1, a second diode D2, a third diode D3 and a fourth diode D4, and the micro control module 6 includes a first controller U1. Specifically, one end of the third thyristor S3 is connected to the second end of the first battery pack through the second resistor R2, the other end of the third thyristor S3 is connected to the first end of the fourth thyristor S4 and one end of the seventh thyristor S7, the second end of the fourth thyristor S4 is connected to the second end of the second battery pack through the fourth resistor R4, the anode of the sixth thyristor S6 is connected to the first end of the second battery pack through the third resistor R3, the cathode of the sixth thyristor S6 is connected to the cathode of the eighth thyristor S8 and the cathode of the fifth thyristor S5, the anode of the fifth thyristor S5 is connected to the first end of the third battery pack through the fifth resistor R5, the other end of the seventh thyristor S7 is connected to the second end of the third battery pack through the sixth resistor R6, the anode of the eighth thyristor S8 is connected to the first end of the first battery pack through the seventh resistor R7, the control end of the eighth thyristor S8 is connected to the cathode of the fourth diode D4 and the cathode of the third diode D3, the anode of the fourth diode D4 is connected to the control end of the third thyristor S3 and the IO2 end of the first controller U1, the anode of the third diode D3 is connected to the anode of the second diode D2 and the IO1 end of the first controller U1, the cathode of the second diode D2 is connected to the control end of the seventh thyristor S7 and the cathode of the first diode D1, the anode of the first diode D1 is connected to the control end of the fifth thyristor S5 and the IO4 end of the first controller U1, the control end of the sixth thyristor S6 is connected to the control end of the fourth thyristor S4 and the IO3 end of the first controller U1, and the anode of the fourth diode D4 is connected to the control end of the third thyristor S3 and the IO2 end of the first controller U1.
[0022] In specific embodiments, the third thyristor S3, the fourth thyristor S4 and the seventh thyristor S7 can be bidirectional thyristors, the fifth thyristor S5, the sixth thyristor S6 and the eighth thyristor S8 can be unidirectional thyristors, and the first controller U1 can be an STM32 single-chip microcomputer.
[0023] Further, the voltage detection module 3 includes a first capacitor C1, an eighth resistor R8, a first operational amplifier OP1, a ninth resistor R9 and a second operational amplifier OP2. Specifically, one end of the first capacitor C1 is connected to the cathode of the eighth thyristor S8 and the non-inverting terminal of the first operational amplifier OP1, and the other end of the first capacitor C1 is connected to the ground terminal through the eighth resistor R8, the inverting terminal of the first operational amplifier OP1 is connected to the first end of the fourth thyristor S4, and the output terminal of the first operational amplifier OP1 is connected to the non-inverting terminal of the second operational amplifier OP2 through the ninth resistor R9, the inverting terminal of the second operational amplifier OP2 is connected to the IO5 end of the first controller U1, the output terminal of the second operational amplifier OP2 is connected to the fault detection module 5.
[0024] In specific embodiments, the first operational amplifier OP1 and the second operational amplifier OP2 can be OP07 operational amplifiers, the first operational amplifier OP1 performs differential amplification with the eighth resistor R8, the first capacitor C1 and the ninth resistor R9, and the second operational amplifier OP2 performs voltage following processing.
[0025] Further, the change detection module 4 includes a tenth resistor R10, an eleventh resistor R11, a fourth operational amplifier OP4, a third operational amplifier OP3, a second capacitor C2, a twelfth resistor R12 and an absolute value device. Specifically, the inverting terminal of the fourth operational amplifier OP4 is connected to one end of the eleventh resistor R11 and the output terminal of the second operational amplifier OP2 through the tenth resistor R10, the other end of the eleventh resistor R11 is connected to the output terminal of the third operational amplifier OP3 and one end of the twelfth resistor R12 through the second capacitor C2, the other end of the twelfth resistor R12 is connected to the output terminal of the fourth operational amplifier OP4 and the input terminal of the absolute value device, and the non-inverting terminal of the fourth operational amplifier OP4 and the non-inverting terminal of the third operational amplifier OP3 are both grounded.
[0026] In specific embodiments, the third operational amplifier OP3 and the fourth operational amplifier OP4 can be OP07 operational amplifiers; the absolute value device can be composed of a diode, a capacitor, a resistor and an operational amplifier, which can transmit the input positive value signal and perform absolute value processing on the input negative value signal.
[0027] Further, the change detection module 4 further includes a first comparator A1, a second comparator A2, a first reference power supply VF1, a second reference power supply VF2 and a self-locking device. Specifically, the non-inverting terminal of the first comparator A1 is connected to the non-inverting terminal of the second comparator A2 and the output terminal of the absolute value device, the inverting terminal of the first comparator A1 and the inverting terminal of the second comparator A2 are connected to the first reference power supply VF1 and the second reference power supply VF2 respectively, the output terminal of the first comparator A1 is connected to the IO6 terminal of the first controller U1, the output terminal of the second comparator A2 is connected to the IO7 terminal of the first controller U1 and the input terminal of the self-locking device, and the output terminal of the self-locking device is connected to the base of the first switch tube V1.
[0028] In specific embodiments, the first comparator A1 and the second comparator A2 can be LM358 comparators; the first reference power supply VF1 and the second reference power supply VF2 can provide the first change threshold and the second change threshold respectively; and the self-locking device can be composed of a triode and a resistor to perform high-level self-locking processing on the input signal.
[0029] Further, the fault detection module 5 comprises a third comparator A3, a fourth comparator A4, a ninth thyristor S9, a tenth thyristor S10, an eleventh thyristor S11, a twelfth thyristor S12, a fifth diode D5, a sixth diode D6, a seventh diode D7, a third reference power supply VF3, a fourth reference power supply VF4, a fifth reference power supply VF5, a sixth reference power supply VF6 and an eighth diode D8. Specifically, the non-inverting terminal of the third comparator A3 is connected with the inverting terminal of the fourth comparator A4 and the output terminal of the second operational amplifier OP2, the inverting terminal of the third comparator A3 is connected with the cathode of the ninth thyristor S9 and the cathode of the eleventh thyristor S11, the non-inverting terminal of the fourth comparator A4 is connected with the cathode of the tenth thyristor S10 and the cathode of the twelfth thyristor S12, the anode of the ninth thyristor S9, the anode of the eleventh thyristor S11, the anode of the tenth thyristor S10 and the anode of the twelfth thyristor S12 are connected with the third reference power supply VF3, the fourth reference power supply VF4, the fifth reference power supply VF5 and the sixth reference power supply VF6 respectively, the control terminal of the ninth thyristor S9 is connected with the control terminal of the tenth thyristor S10 and the IO1 terminal of the first controller U1, the cathode of the eleventh thyristor S11 is connected with the cathode of the twelfth thyristor S12, the cathode of the fifth diode D5, the cathode of the sixth diode D6 and the cathode of the seventh diode D7, the anode of the fifth diode D5, the anode of the sixth diode D6 and the anode of the seventh diode D7 are connected with the IO2 terminal, the IO3 terminal and the IO4 terminal of the first controller U1 respectively, the output terminal of the third comparator A3 is connected with the output terminal of the fourth comparator A4, the IO8 terminal of the first controller U1 and the anode of the eighth diode D8, the cathode of the eighth diode D8 is connected with the base of the first switch tube V1.
[0030] In specific embodiments, the above ninth thyristor S9, tenth thyristor S10, eleventh thyristor S11 and twelfth thyristor S12 can be selected as unidirectional thyristors, the above third comparator A3 and fourth comparator A4 can be selected as LM358 comparators, the above third reference power supply VF3 and fifth reference power supply VF5 provide a first overvoltage threshold and a first undervoltage threshold respectively, the above fourth thyristor S4 and sixth thyristor S6 provide a second overvoltage threshold and a second undervoltage threshold respectively.
[0031] In the multi-battery voltage self-detection system, the first controllable silicon S1 and the second controllable silicon S2 are triggered to conduct by the first resistor R1, so that the first battery pack, the second battery pack and the third battery pack are connected in series, and the power port can access or output power, realizing the charge and discharge control of the first battery pack, the second battery pack and the third battery pack in series. The seventh controllable silicon S7 and the eighth controllable silicon S8 are triggered to conduct by the IO1 terminal of the first controller U1, and the ninth controllable silicon S9 and the tenth controllable silicon S10 are triggered to conduct, so that the first operational amplifier OP1, the eighth resistor R8, the first capacitor C1 and the ninth resistor R9 perform differential amplification and voltage following processing on the first battery pack, the second battery pack and the third battery pack in series. The processed signal is overvoltage detected by the first overvoltage threshold provided by the third comparator A3 and the third reference power supply VF3, and undervoltage detected by the first undervoltage threshold provided by the fourth comparator A4 and the fifth reference power supply VF5. When overvoltage or undervoltage occurs, the first switch tube V1 is triggered to conduct by the IO8 terminal of the first controller U1, the connection between the first battery pack, the second battery pack and the third battery pack is controlled to be disconnected, the charge and discharge work of the battery pack is stopped, and the voltage detection work is stopped. When no overvoltage or undervoltage occurs, the signal output by the second operational amplifier OP2 will also be subjected to voltage reduction rate detection by the fourth operational amplifier OP4, the third operational amplifier OP3, the second capacitor C2, the twelfth resistor R12, the eleventh resistor R11, the tenth resistor R10 and the absolute value device. When the voltage reduction rate is greater than the first change threshold provided by the first reference power supply VF1, the first comparator A1 outputs high level and is received by the IO6 terminal of the first controller U1, so that the IO1 terminal of the first controller U1 stops working and provides high level by the IO2 terminal, the IO3 terminal and the IO4 terminal with the same timing time. Then the eighth controllable silicon S8 and the third controllable silicon S3 are controlled to conduct in turn, the sixth controllable silicon S6 and the fourth controllable silicon S4 are controlled to conduct, and the fifth controllable silicon S5 and the seventh controllable silicon S7 are controlled to conduct, so that the voltage detection module 3 detects the voltage of the first battery pack, the second battery pack and the third battery pack respectively. At the same time, the IO2 terminal, the IO3 terminal and the IO4 terminal control the eleventh controllable silicon S11 and the twelfth controllable silicon S12 to conduct, so that the signals obtained by voltage detection are processed by the second overvoltage threshold provided by the third comparator A3, the fourth comparator A4 and the fourth reference power supply VF4, and the second undervoltage threshold provided by the sixth reference power supply VF6, to detect the overvoltage and undervoltage of the first battery pack, the second battery pack or the third battery pack. Similarly, the voltage change rate detection processing is performed by the change detection module 4.
[0032] It will be obvious to a person skilled in the art that the application is not limited to the details of the foregoing exemplary embodiments and can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. The embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims to the identity of the reference signs therein.
[0033] Furthermore, it should be understood that although the description is made on the basis of the embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.
Claims
1. A multi-cell electrical change self-detection system, characterized in that, The system includes: A multi-battery module is used to control the first battery pack, the second battery pack, and the third battery pack to perform energy storage and discharge in series. The detection and control module is connected to the multi-battery module and the voltage detection module. It is used to transmit the first electrical energy provided by the first battery pack, the second battery pack and the third battery pack in series, the second electrical energy provided by the first battery pack alone, the third electrical energy provided by the second battery pack alone or the fourth electrical energy provided by the third battery pack alone to the voltage detection module. The voltage detection module is used to differentially amplify and voltage follow the first electrical energy, the second electrical energy, the third electrical energy, or the fourth electrical energy and output the first detection signal; The change detection module, connected to the voltage detection module and the multi-battery module, is used to detect the voltage change rate of the first detection signal and process the absolute value of the detected signal. When the processed signal is greater than the set first change threshold, the second detection signal is output. When the processed signal is greater than the set second change threshold, the third detection signal is output and the connection between the first battery pack, the second battery pack and the third battery pack is disconnected. The fault detection module is connected to the voltage detection module, the multi-battery module, and the microcontroller module. It is used to output a fourth detection signal and control the disconnection between the first battery pack, the second battery pack, and the third battery pack when the microcontroller module controls the detection control module to perform series voltage detection and the first detection signal is greater than the set first overvoltage threshold or less than the first undervoltage threshold. When the microcontroller module controls the detection control module to perform individual voltage detection on the multi-battery module and the first detection signal is greater than the set second overvoltage threshold or less than the second undervoltage threshold, it outputs a fourth detection signal. The microcontroller module, connected to the detection control module, voltage detection module, and change detection module, is used to control the detection control module to transmit the first electrical energy and receive the first detection signal. When the second or third detection signal is received, the microcontroller module stops transmitting the first electrical energy and controls the detection control module to transmit the second, third, and fourth electrical energy sequentially at the same timing interval, and receives the fourth detection signal.
2. The multi-battery electrical change self-detection system according to claim 1, characterized in that, The multi-battery module includes a power port, a first battery pack, a first resistor, a first thyristor, a second battery pack, a second thyristor, a third battery pack, and a first switching transistor; The first end of the power port is connected to the first end of the first battery pack and is connected to the control terminal of the first thyristor, the control terminal of the second thyristor, and the collector of the first switching transistor through the first resistor. The second end of the first battery pack is connected to one end of the first thyristor, the other end of the first thyristor is connected to the first end of the second battery pack, the second end of the second battery pack is connected to one end of the second thyristor, the other end of the second thyristor is connected to the first end of the third battery pack, the second end of the third battery pack is connected to the second end of the power port, the base of the first switching transistor is connected to the fault detection module, and the emitter of the first switching transistor is grounded.
3. The multi-battery electrical change self-detection system according to claim 2, characterized in that, The detection and control module includes a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a third thyristor, a fourth thyristor, a fifth thyristor, a sixth thyristor, a seventh thyristor, an eighth thyristor, a first diode, a second diode, a third diode, and a fourth diode; the microcontroller module includes a first controller; One end of the third thyristor is connected to the second end of the first battery pack via a second resistor. The other end of the third thyristor is connected to the first end of the fourth thyristor and one end of the seventh thyristor. The second end of the fourth thyristor is connected to the second end of the second battery pack via a fourth resistor. The anode of the sixth thyristor is connected to the first end of the second battery pack via a third resistor. The cathode of the sixth thyristor is connected to the cathode of the eighth thyristor and the cathode of the fifth thyristor. The anode of the fifth thyristor is connected to the first end of the third battery pack via a fifth resistor. The other end of the seventh thyristor is connected to the second end of the third battery pack via a sixth resistor. The anode of the eighth thyristor is connected to the first end of the first battery pack via a seventh resistor. At one end, the control terminal of the eighth thyristor is connected to the cathode of the fourth diode and the cathode of the third diode. The anode of the fourth diode is connected to the control terminal of the third thyristor and the IO2 terminal of the first controller. The anode of the third diode is connected to the anode of the second diode and the IO1 terminal of the first controller. The cathode of the second diode is connected to the control terminal of the seventh thyristor and the cathode of the first diode. The anode of the first diode is connected to the control terminal of the fifth thyristor and the IO4 terminal of the first controller. The control terminal of the sixth thyristor is connected to the control terminal of the fourth thyristor and the IO3 terminal of the first controller. The anode of the fourth diode is connected to the control terminal of the third thyristor and the IO2 terminal of the first controller.
4. The multi-battery electrical change self-detection system according to claim 3, characterized in that, The voltage detection module includes a first capacitor, an eighth resistor, a first operational amplifier, a ninth resistor, and a second operational amplifier; One end of the first capacitor is connected to the cathode of the eighth thyristor and the non-inverting input of the first operational amplifier, and the other end of the first capacitor is connected to ground through the eighth resistor. The inverting input of the first operational amplifier is connected to the first end of the fourth thyristor, and the output of the first operational amplifier and the non-inverting input of the second operational amplifier are connected through the ninth resistor. The inverting input of the second operational amplifier is connected to the IO5 terminal of the first controller, the output terminal of the second operational amplifier, and the fault detection module.
5. The multi-battery electrical change self-detection system according to claim 4, characterized in that, The change detection module includes a tenth resistor, an eleventh resistor, a fourth operational amplifier, a third operational amplifier, a second capacitor, a twelfth resistor, and an absolute value device; The inverting input of the fourth operational amplifier is connected to one end of the eleventh resistor and then to the output of the second operational amplifier through the tenth resistor. The other end of the eleventh resistor is connected to the output of the third operational amplifier and then to the inverting input of the third operational amplifier and one end of the twelfth resistor through the second capacitor. The other end of the twelfth resistor is connected to the output of the fourth operational amplifier and the input of the absolute value device. The non-inverting inputs of the fourth and third operational amplifiers are both grounded.
6. The multi-battery electrical change self-detection system according to claim 5, characterized in that, The change detection module further includes a first comparator, a second comparator, a first reference power supply, a second reference power supply, and a self-locking device; The non-inverting input of the first comparator is connected to the non-inverting input of the second comparator and the output of the absolute value device. The inverting inputs of the first and second comparators are respectively connected to the first reference power supply and the second reference power supply. The output of the first comparator is connected to the IO6 terminal of the first controller. The output of the second comparator is connected to the IO7 terminal of the first controller and the input of the self-locking device. The output of the self-locking device is connected to the base of the first switching transistor.
7. The multi-battery electrical change self-detection system according to claim 6, characterized in that, The fault detection module includes a third comparator, a fourth comparator, a ninth thyristor, a tenth thyristor, an eleventh thyristor, a twelfth thyristor, a fifth diode, a sixth diode, a seventh diode, a third reference power supply, a fourth reference power supply, a fifth reference power supply, a sixth reference power supply, and an eighth diode. The non-inverting input of the third comparator is connected to the inverting input of the fourth comparator and the output of the second operational amplifier. The inverting input of the third comparator is connected to the cathodes of the ninth and eleventh thyristors. The non-inverting input of the fourth comparator is connected to the cathodes of the tenth and twelfth thyristors. The anodes of the ninth, eleventh, tenth, and twelfth thyristors are respectively connected to the third, fourth, fifth, and sixth reference power supplies. The control terminal of the ninth thyristor is connected to the control terminal of the tenth thyristor and the IO1 terminal of the first controller. The cathode of the eleventh thyristor is connected to the cathodes of the twelfth thyristor, the fifth diode, the sixth diode, and the seventh diode. The anodes of the fifth, sixth, and seventh diodes are respectively connected to the IO2, IO3, and IO4 terminals of the first controller. The output of the third comparator is connected to the output of the fourth comparator, the IO8 terminal of the first controller, and the anode of the eighth diode. The cathode of the eighth diode is connected to the base of the first switching transistor.