A battery pack charge and discharge performance detection circuit

Abstract

The present invention discloses a battery pack charge and discharge performance detection circuit, which relates to the field of battery pack detection technology. The circuit includes a charging module that rectifies and stabilizes the electric energy output after conversion and processing by a power control module, cooperates with a microcontroller module to control a first battery module and a second battery module to perform series charging or separate charging, the microcontroller module controls a first discharge module to perform series discharge control on the first and second battery modules in a series state, and cooperates with the second discharge module to control the first or second battery module to discharge. The power module and the charging module perform electric energy conversion processing, and then control the second or first battery module to store energy. The electric energy detection module performs charge and discharge parameter detection. The battery pack charge and discharge performance detection circuit of the present invention can realize energy-saving charge and discharge detection control, automatically realize charge and discharge detection of battery modules in different connection states, and improve charge and discharge detection efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of battery pack detection, in particular to a battery pack charge and discharge performance detection circuit. Background Art

[0002] During the charging and discharging process, the battery can be subjected to a verification discharge test and inspection specifically for the charging and discharging status of the battery by electrical detection equipment. In practical applications, in order to obtain the required high-voltage, high-capacity battery pack, the battery pack is generally composed of multiple single cells connected in series or in parallel. However, when performing charge and discharge inspections on the battery pack, relevant staff are required to manually select the required inspection points and use relevant electrical detection equipment to realize charge and discharge inspection control of the single cell or battery pack. The operation method is relatively cumbersome, and the charge and discharge inspection method cannot be automatically changed. It is impossible to accurately perform charge and discharge inspections on the battery pack, and there is a certain amount of energy waste when performing discharge inspections, so it needs to be improved. Summary of the Invention

[0003] An embodiment of the present invention provides a battery pack charge and discharge performance detection circuit to solve the problems raised in the above background technology.

[0004] According to an embodiment of the present invention, a battery pack charge and discharge performance detection circuit is provided, comprising: a power control module connected to a second discharge module, configured to perform high-frequency isolation and conversion processing on the DC power received or the first power output by the second discharge module and output second power;

[0005] a charging module connected to the power control module, the first battery module, and the second battery module, configured to rectify and power-regulate the second electric energy and output a third electric energy, rectify and power-regulate the second electric energy and output a fourth electric energy, transmit the third electric energy and the fourth electric energy to the first battery module and the second battery module, respectively, perform electric energy superposition processing on the third electric energy and the fourth electric energy and output a fifth electric energy, and control the first battery module and the second battery module to be connected in series;

[0006] The first battery module is configured to store the third electrical energy and the fifth electrical energy, release the sixth electrical energy, and output the eighth electrical energy when connected in series with the second battery module for power supply;

[0007] a second battery module for storing the fourth electrical energy and the fifth electrical energy and releasing the seventh electrical energy;

[0008] a first discharging module connected to the first battery module and the second battery module, configured to consume the eighth electrical energy;

[0009] a second discharging module, connected to the first battery module and the second battery module, configured to transmit the received sixth electric energy or seventh electric energy and provide the first electric energy;

[0010] an electric energy detection module connected to the first battery module and the second battery module, configured to respectively detect the sixth electric energy, the seventh electric energy, and the eighth electric energy and output a first detection signal, a second detection signal, and a third detection signal, respectively, perform a full-charge detection and a full-charge sequence judgment on the first detection signal and the second detection signal and output a fourth detection signal;

[0011] The microcontrol module is connected to the power detection module, the first discharge module, the first battery module, the second battery module and the charging module, and is used to control the charging module to perform power superposition when the first battery module and the second battery module are charged in series, and to control the first discharge module to perform power consumption when discharging in series, and to receive a third detection signal; when the first battery module and the second battery module are charged separately, control the charging module to supply power separately, receive the first detection signal and the second detection signal; when the first battery module is charged separately and the second battery module is discharged separately, control the second discharge module to transmit the seventh power and control the charging module to stop outputting the fourth power; when the first battery module is discharged separately and the second battery module is charged separately, control the second discharge module to transmit the sixth power and control the charging module to stop outputting the third power; and receive a fourth detection signal.

[0012] As a further solution of the present invention: the power control module includes a power interface, an electric energy conversion device, a first capacitor, a first inductor, and a first transformer; the charging module includes a first diode, a second diode, a first power tube, a second capacitor, a third diode, a first thyristor, and a first battery interface; the microcontroller module includes a first controller;

[0013] Preferably, the first end and the second end of the power interface are respectively connected to the first end and the second end of the power conversion device, the third end of the power conversion device is connected to one end of the first inductor and the first end of the primary side of the first transformer through the first capacitor, the fourth end of the power conversion device is connected to the other end of the first inductor and the second end of the primary side of the first transformer, the first end and the second end of the first secondary side of the first transformer are respectively connected to the anode of the second diode and the anode of the first diode, the cathode of the geothermal diode is connected to the anode of the third diode and is connected to the drain of the first power tube and the cathode of the first thyristor through the second capacitor, the source of the first power tube is connected to the anode of the first diode, the cathode of the third diode is connected to the first end of the first battery interface, the anode of the first thyristor is connected to the second end of the first battery interface, the gate of the first power tube is connected to the IO1 end of the first controller, and the control end of the first thyristor is connected to the IO6 end of the first controller.

[0014] As a further embodiment of the present invention, the charging module further includes a fourth diode, a second power transistor, a third capacitor, a third thyristor, a sixth thyristor, and a second thyristor; the second battery module includes a second battery interface; and the microcontroller module further includes a first inverter.

[0015] Preferably, the cathode of the fourth diode is connected to the drain of the second power tube, the source of the second power tube is connected to the anode of the third thyristor and the anode of the sixth thyristor and is connected to the first end of the second secondary side of the first transformer and the second end of the second battery interface through the third capacitor, the cathode of the third thyristor is connected to the first end of the second battery interface and one end of the second thyristor, the other end of the second thyristor is connected to the second end of the first battery interface, the control end of the second thyristor is connected to the control end of the sixth thyristor, the power detection module and the input end of the first inverter, the output end of the first inverter, the control end of the third thyristor is connected to the input end of the first inverter and the IO6 end of the first controller, and the cathode of the sixth thyristor is connected to the drain of the first power tube.

[0016] As a further solution of the present invention: the first discharge module includes a fifth power tube and a first load;

[0017] Preferably, the drain of the fifth power tube is connected to the first end of the first battery interface, the source of the fifth power tube is connected to the second end of the second battery interface through the first load, and the gate of the fifth power tube is connected to the IO5 end of the first controller.

[0018] As a further solution of the present invention: the second discharge module includes a fourth power tube, a third power tube, a fourth thyristor, a fifth thyristor, a fifth diode, a sixth diode and a ninth diode;

[0019] Preferably, the drain of the fourth power tube is connected to the first end of the first battery interface, the drain of the third power tube is connected to the first end of the second battery interface, the source of the third power tube is connected to the source of the fourth power tube and the anode of the ninth diode, the cathode of the ninth diode is connected to the first end of the power interface, the anode of the fourth thyristor and the anode of the fifth thyristor are respectively connected to the second end of the second battery interface and the second end of the first battery interface, the cathode of the fourth thyristor and the cathode of the fifth thyristor are both connected to the second end of the power interface, the control end of the fourth thyristor is connected to the gate of the third power tube, the anode of the fifth diode and the IO3 end of the first controller, the control end of the fifth thyristor is connected to the gate of the fourth power tube, the anode of the sixth diode and the IO4 end of the first controller, and the cathode of the fifth diode is connected to the cathode of the sixth diode and the input end of the first inverter.

[0020] As a further solution of the present invention: the electric energy detection module includes a first resistor, a second resistor, a third resistor, a fourth resistor and a first analog switch;

[0021] Preferably, the first end of the first resistor is connected to the first end of the first battery interface, the second end of the first resistor is connected to the third end of the first analog switch and connected to the second end of the first battery interface through the second resistor, the first end of the third resistor is connected to the first end of the first analog switch and the first end of the second battery interface, the second end of the third resistor is connected to the eighth end of the first analog switch and connected to the second end of the second battery interface through the fourth resistor, the fourth end, the second end and the ninth end of the first analog switch are respectively connected to the IO7 end, the IO8 end and the IO9 end of the first controller, the thirteenth end of the first analog switch is connected to the output end of the first inverter, and the fifth end and the sixth end of the first analog switch are both connected to the input end of the first inverter.

[0022] As a further solution of the present invention: the electric energy detection module further includes a fifth resistor, a seventh diode, a sixth resistor, an eighth diode, a first logic device, a second logic device and a third logic device;

[0023] Preferably, the cathode of the seventh diode is connected to the second end of the first resistor through the fifth resistor, the anode of the seventh diode is connected to the A end of the first logic unit and the A end of the second logic unit, the cathode of the eighth diode is connected to the second end of the third resistor through the sixth resistor, the anode of the eighth diode is connected to the B end of the first logic unit and the B end of the third logic unit, the Y end of the first logic unit is connected to the B end of the second logic unit and the A end of the third logic unit, and the Y end of the second logic unit and the Y end of the third logic unit are respectively connected to the IO10 end and IO11 end of the first controller.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: the battery pack charge and discharge performance detection circuit of the present invention can use the charging module to rectify and stabilize the electric energy output after the conversion and processing of the power control module, and cooperate with the micro-control module to control the first battery module and the second battery module to perform series charging, or control the first battery module and the second battery module to perform separate charging. The micro-control module can also control the first discharge module to perform series discharge control on the first battery module and the second battery module in the series state. The micro-control module cooperates with the second discharge module to realize the discharge of the first battery module or the second battery module, and the power module and the charging module perform electric energy conversion processing, control the second battery module or the first battery module to perform energy storage, and the electric energy detection module performs charge and discharge parameter detection, thereby realizing energy-saving charge and discharge detection control, automatically realizing charge and discharge detection of battery modules in different connection states, and improving charge and discharge detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A schematic block diagram of a battery pack charge and discharge performance detection circuit according to an embodiment of the present invention.

[0027] Figure 2 A circuit diagram of a battery pack charge and discharge performance detection circuit provided by an embodiment of the present invention.

[0028] Figure 3 This is a first circuit diagram of the electric energy detection module provided by an embodiment of the present invention.

[0029] Figure 4 This is a second circuit diagram of the electric energy detection module provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] In one embodiment, see Figure 1 , a battery pack charge and discharge performance detection circuit, comprising: a power control module 1, connected to a second discharge module 6, for performing high-frequency isolation and conversion processing on the input DC power or the first power output by the second discharge module 6 and outputting the second power;

[0032] The charging module 2 is connected to the power control module 1, the first battery module 3, and the second battery module 4, and is used to rectify and power-regulate the second electric energy and output a third electric energy, rectify and power-regulate the second electric energy and output a fourth electric energy, transmit the third electric energy and the fourth electric energy to the first battery module 3 and the second battery module 4, respectively, perform electric energy superposition processing on the third electric energy and the fourth electric energy and output a fifth electric energy, and control the first battery module 3 and the second battery module 4 to be connected in series;

[0033] The first battery module 3 is used to store the third electrical energy and the fifth electrical energy, release the sixth electrical energy, and output the eighth electrical energy when connected in series with the second battery module 4;

[0034] a second battery module 4 for storing the fourth electrical energy and the fifth electrical energy and releasing the seventh electrical energy;

[0035] a first discharging module 5 connected to the first battery module 3 and the second battery module 4 for consuming the eighth electrical energy;

[0036] a second discharging module 6 connected to the first battery module 3 and the second battery module 4, configured to transmit the received sixth electric energy or the seventh electric energy and provide the first electric energy;

[0037] an electric energy detection module 7 connected to the first battery module 3 and the second battery module 4, configured to perform electric energy detection on the sixth electric energy, the seventh electric energy, and the eighth electric energy, respectively, and output a first detection signal, a second detection signal, and a third detection signal, respectively; perform full-charge detection and full-charge sequence judgment on the first detection signal and the second detection signal, and output a fourth detection signal;

[0038] The microcontroller module 8 is connected to the power detection module 7, the first discharge module 5, the first battery module 3, the second battery module 4 and the charging module 2, and is used to control the charging module 2 to perform power superposition when the first battery module 3 and the second battery module 4 are charged in series, and to control the first discharge module 5 to perform power consumption when discharging in series, receive a third detection signal, control the charging module 2 to supply power separately when charging the first battery module 3 and the second battery module 4 separately, receive the first detection signal and the second detection signal, control the second discharge module 6 to transmit the seventh power and control the charging module 2 to stop outputting the fourth power when charging the first battery module 3 separately and discharging the second battery module 4 separately, control the second discharge module 6 to transmit the sixth power and control the charging module 2 to stop outputting the third power when discharging the first battery module 3 separately and charging the second battery module 4 separately, and receive the fourth detection signal.

[0039] In a specific embodiment, the power control module 1 can adopt a power control circuit composed of a power interface, an electric energy conversion device, a capacitor, a transformer, etc., and can perform high-frequency electric energy conversion processing and isolation transformation processing on the connected electric energy; the charging module 2 can adopt a charging circuit composed of a diode, a field effect transistor, a thyristor, a capacitor, etc., and can perform dual-path rectification and filtering, power regulation processing and electric energy transmission control on the electric energy output by the power control module 1, and can superimpose and control the processed electric energy and control the first battery module 3 and the second battery module 4 to be connected in series; the first battery module 3 can adopt a first battery circuit composed of a battery interface to be connected to a single battery of the battery pack; the second battery module 4 can adopt a second battery circuit composed of a battery interface to be connected to a single battery of the battery pack; the first discharge Module 5 can use a first discharge circuit composed of a field-effect transistor and a load to control power consumption; the above-mentioned second discharge module 6 can use a second discharge circuit composed of a field-effect transistor, a thyristor and a diode, which can transmit the power output by the first battery module 3 or the second battery module 4 to the power control module 1; the above-mentioned power detection module 7 can use a power detection circuit composed of a resistor, an analog switch, a diode and a logic device, which can perform separate voltage sampling and series voltage sampling on the first battery module 3 and the second battery module 4, control the signal transmission path, and perform full-charge detection; the above-mentioned microcontroller module 8 can use a microcontroller circuit composed of a single-chip microcomputer and an inverter, which integrates many components such as an inverter, an arithmetic unit, a controller, a memory, and an input and output device to realize functions such as signal processing, data storage, module control, and timing control.

[0040] In another embodiment, see Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The power control module 1 includes a power interface, an electric energy conversion device, a first capacitor C1, a first inductor L1 and a first transformer B1; the charging module 2 includes a first diode D1, a second diode D2, a first power tube Q1, a second capacitor C2, a third diode D3, a first thyristor S1 and a first battery interface; the micro control module 8 includes a first controller U1;

[0041] Specifically, the first end and the second end of the power interface are connected to the first end and the second end of the power conversion device respectively. The third end of the power conversion device is connected to one end of the first inductor L1 and the first end of the primary side of the first transformer B1 through the first capacitor C1. The fourth end of the power conversion device is connected to the other end of the first inductor L1 and the second end of the primary side of the first transformer B1. The first end and the second end of the first secondary side of the first transformer B1 are connected to the anode of the second diode D2 and the anode of the first diode D1 respectively. The cathode of the geothermal diode is connected to the anode of the third diode D3 and is connected to the drain of the first power tube Q1 and the cathode of the first thyristor S1 through the second capacitor C2. The source of the first power tube Q1 is connected to the anode of the first diode D1. The cathode of the third diode D3 is connected to the first end of the first battery interface. The anode of the first thyristor S1 is connected to the second end of the first battery interface. The gate of the first power tube Q1 is connected to the IO1 terminal of the first controller U1, and the control terminal of the first thyristor S1 is connected to the IO6 terminal of the first controller U1.

[0042] In a specific embodiment, the above-mentioned electric energy conversion device can be composed of an inductor and a field-effect transistor, and adopts a pulse drive method to perform high-frequency regulation and control on the input electric energy; the above-mentioned first power tube Q1 can be an N-channel field-effect tube; the above-mentioned first thyristor S1 can be a unidirectional thyristor; the above-mentioned first controller U1 can be an STM32 microcontroller.

[0043] Furthermore, the charging module 2 further includes a fourth diode D4, a second power tube Q2, a third capacitor C3, a third thyristor S3, a sixth thyristor S6 and a second thyristor S2; the second battery module 4 includes a second battery interface; the micro-control module 8 further includes a first inverter INV1;

[0044] Specifically, the cathode of the fourth diode D4 is connected to the drain of the second power tube Q2, the source of the second power tube Q2 is connected to the anode of the third thyristor S3 and the anode of the sixth thyristor S6 and is connected to the first end of the second secondary side of the first transformer B1 through the third capacitor C3, the cathode of the third thyristor S3 is connected to the first end of the second battery interface and one end of the second thyristor S2, the other end of the second thyristor S2 is connected to the second end of the first battery interface, the control end of the second thyristor S2 is connected to the control end of the sixth thyristor S6, the power detection module 7 and the input end of the first inverter INV1, and the output end of the first inverter INV1, the control end of the third thyristor S3 is connected to the input end of the first inverter INV1 and the IO6 end of the first controller U1, and the cathode of the sixth thyristor S6 is connected to the drain of the first power tube Q1.

[0045] In a specific embodiment, the second power tube Q2 can be an N-channel field effect tube; the third thyristor S3 and the sixth thyristor S6 can be unidirectional thyristors, the second thyristor S2 can be a bidirectional thyristor; the first inverter INV1 can be a NOT gate chip.

[0046] Furthermore, the first discharge module 5 includes a fifth power tube Q5 and a first load RL;

[0047] Specifically, the drain of the fifth power tube Q5 is connected to the first end of the first battery interface, the source of the fifth power tube Q5 is connected to the second end of the second battery interface through the first load RL, and the gate of the fifth power tube Q5 is connected to the IO5 terminal of the first controller U1.

[0048] In a specific embodiment, the fifth power transistor Q5 can be an N-channel field effect transistor.

[0049] Furthermore, the second discharge module 6 includes a fourth power tube Q4, a third power tube Q3, a fourth thyristor S4, a fifth thyristor S5, a fifth diode D5, a sixth diode D6 and a ninth diode D9;

[0050] Specifically, the drain of the fourth power tube Q4 is connected to the first end of the first battery interface, the drain of the third power tube Q3 is connected to the first end of the second battery interface, the source of the third power tube Q3 is connected to the source of the fourth power tube Q4 and the anode of the ninth diode D9, the cathode of the ninth diode D9 is connected to the first end of the power interface, the anode of the fourth thyristor S4 and the anode of the fifth thyristor S5 are connected to the second end of the second battery interface and the second end of the first battery interface, respectively, the cathode of the fourth thyristor S4 and the cathode of the fifth thyristor S5 are both connected to the second end of the power interface, the control end of the fourth thyristor S4 is connected to the gate of the third power tube Q3, the anode of the fifth diode D5 and the IO3 terminal of the first controller U1, the control end of the fifth thyristor S5 is connected to the gate of the fourth power tube Q4, the anode of the sixth diode D6 and the IO4 terminal of the first controller U1, and the cathode of the fifth diode D5 is connected to the cathode of the sixth diode D6 and the input end of the first inverter INV1.

[0051] In a specific embodiment, the third power tube Q3 and the fourth power tube Q4 can both be N-channel field effect tubes; the fourth thyristor S4 and the fifth thyristor S5 can both be unidirectional thyristors.

[0052] Furthermore, the power detection module 7 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4 and a first analog switch U2;

[0053] Specifically, the first end of the first resistor R1 is connected to the first end of the first battery interface, the second end of the first resistor R1 is connected to the third end of the first analog switch U2 and is connected to the second end of the first battery interface through the second resistor R2, the first end of the third resistor R3 is connected to the first end of the first analog switch U2 and the first end of the second battery interface, the second end of the third resistor R3 is connected to the eighth end of the first analog switch U2 and is connected to the second end of the second battery interface through the fourth resistor R4, the fourth end, the second end and the ninth end of the first analog switch U2 are respectively connected to the IO7 end, the IO8 end and the IO9 end of the first controller U1, the thirteenth end of the first analog switch U2 is connected to the output end of the first inverter INV1, and the fifth end and the sixth end of the first analog switch U2 are both connected to the input end of the first inverter INV1.

[0054] In a specific embodiment, the first analog switch U2 may be a CD4066 chip.

[0055] Furthermore, the power detection module 7 further includes a fifth resistor R5, a seventh diode D7, a sixth resistor R6, an eighth diode D8, a first logic unit J1, a second logic unit J2 and a third logic unit J3;

[0056] Specifically, the cathode of the seventh diode D7 is connected to the second end of the first resistor R1 through the fifth resistor R5, the anode of the seventh diode D7 is connected to the A end of the first logic unit J1 and the A end of the second logic unit J2, the cathode of the eighth diode D8 is connected to the second end of the third resistor R3 through the sixth resistor R6, the anode of the eighth diode D8 is connected to the B end of the first logic unit J1 and the B end of the third logic unit J3, the Y end of the first logic unit J1 is connected to the B end of the second logic unit J2 and the A end of the third logic unit J3, and the Y end of the second logic unit J2 and the Y end of the third logic unit J3 are respectively connected to the IO10 end and IO11 end of the first controller U1.

[0057] In a specific embodiment, the fifth resistor R5 and the seventh diode D7 and the sixth resistor R6 and the eighth diode D8 are all set with full-charge thresholds to respectively perform full-charge judgment on the first battery module 3 and the second battery module 4; the first logic device J1 can use an XOR gate chip, and the second logic device J2 and the third logic device J3 can both use an AND gate chip.

[0058] In a battery pack charge and discharge performance detection circuit of this embodiment, a power interface is connected to DC power, and an electric energy conversion device, a first capacitor C1, a first inductor L1, and a first transformer B1 perform high-frequency conversion and isolation transformation processing on the input electric energy and output second electric energy. The first battery interface and the second battery interface are respectively connected to single cells. When it is necessary to perform series charging detection on the first battery interface and the second battery interface, the first inverter INV1 triggers the second thyristor S2 and the sixth thyristor S6 to turn on. The IO1 and IO2 terminals of the first controller U1 respectively control the conduction states of the first power tube Q1 and the second power tube Q2. The first power tube Q1 cooperates with the first diode D1, the second diode D2, the second capacitor C2, and the third diode D3. The second electric energy is rectified and power-regulated to output the third electric energy. The second power tube Q2 cooperates with the fourth diode D4 and the third capacitor C3 to perform rectification and power regulation and output the fourth electric energy. The sixth diode D6 superimposes the fourth electric energy and the third electric energy and outputs the fifth electric energy, so as to power the first battery interface and the second battery interface in series. At the same time, the first inverter INV1 triggers the first end and the second end of the first analog switch U2 to be turned on. The electric energy output after the voltage is divided by the first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4 is transmitted to the IO8 terminal of the first controller U1 through the first analog switch U2. When performing series discharge detection, the IO5 terminal of the first controller U1 controls the fifth power tube Q5 to be turned on. The first load RL consumes the electric energy. When performing separate charging detection, the IO6 terminal of the first controller U1 controls the first thyristor S1 and the third thyristor S3 to be turned on, and the second thyristor S2 and the sixth thyristor S6 to be turned off, so that the first battery interface receives the third electric energy separately, and the second battery interface receives the fourth electric energy separately. When charging separately, the first resistor R1 and the second resistor R2 sample the voltage of the first battery interface, and the third resistor R3 and the fourth resistor R4 sample the voltage of the second battery interface. The sampled signals are transmitted to the IO7 terminal and the IO9 terminal of the first controller U1 respectively, and the first battery interface is fully charged through the fifth resistor R5 and the seventh diode D7, and the second battery interface is fully charged through the sixth resistor R6 and the eighth diode D8. The battery interface performs full charge detection. When the first battery interface is fully charged first, the Y end of the second logic chip provides a high level for the IO10 end of the first controller U1. Similarly, when the second battery interface is fully charged first, the Y end of the third logic chip provides a high level for the IO11 end of the first controller U1. When energy saving is required and the single cells of the battery pack are controlled to charge and discharge respectively, that is, the power interface stops counting DC power, the battery connected to the first battery interface is discharged, and the battery connected to the second battery interface is charged, the IO4 end of the first controller U1 will trigger the fourth power tube Q4 and the fifth thyristor S5 to turn on, so that the first battery interface supplies power to the power control module 1, and at this time the IO2 end of the first controller U1 controls the second power tube Q2 to turn on.The regulated electric energy is then transmitted to the second battery interface, and the electric energy detection module 7 performs charge and discharge parameter detection. Similarly, when the battery connected to the second battery interface is discharging and the battery connected to the first battery interface is charging, the first controller U1 controls the first power tube Q1, the third power tube Q3, and the fourth thyristor S4 to realize charging detection of the first battery interface and discharging detection of the second battery interface.

[0059] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0060] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A battery pack charge and discharge performance detection circuit, characterized in that: The circuit includes: a power control module connected to the second discharge module, configured to perform high-frequency isolation and conversion processing on the DC power received or the first power output by the second discharge module and output second power; a charging module connected to the power control module, the first battery module, and the second battery module, configured to rectify and power-regulate the second electric energy and output a third electric energy, rectify and power-regulate the second electric energy and output a fourth electric energy, transmit the third electric energy and the fourth electric energy to the first battery module and the second battery module, respectively, perform electric energy superposition processing on the third electric energy and the fourth electric energy and output a fifth electric energy, and control the first battery module and the second battery module to be connected in series; The first battery module is configured to store the third electrical energy and the fifth electrical energy, release the sixth electrical energy, and output the eighth electrical energy when connected in series with the second battery module for power supply; a second battery module for storing the fourth electrical energy and the fifth electrical energy and releasing the seventh electrical energy; a first discharging module connected to the first battery module and the second battery module, configured to consume the eighth electrical energy; a second discharging module, connected to the first battery module and the second battery module, configured to transmit the received sixth electrical energy or seventh electrical energy and provide the first electrical energy; an electric energy detection module connected to the first battery module and the second battery module, configured to respectively detect the sixth electric energy, the seventh electric energy, and the eighth electric energy and output a first detection signal, a second detection signal, and a third detection signal, respectively, perform a full-charge detection and a full-charge sequence judgment on the first detection signal and the second detection signal and output a fourth detection signal; The microcontrol module is connected to the power detection module, the first discharge module, the first battery module, the second battery module and the charging module, and is used to control the charging module to perform power superposition when the first battery module and the second battery module are charged in series, and to control the first discharge module to perform power consumption when the first battery module and the second battery module are discharged in series, receive a third detection signal, control the charging module to supply power separately when the first battery module and the second battery module are charged separately, receive the first detection signal and the second detection signal, control the second discharge module to transmit the seventh power and control the charging module to stop outputting the fourth power when the first battery module is charged separately and the second battery module is discharged separately, control the second discharge module to transmit the sixth power and control the charging module to stop outputting the third power when the first battery module is discharged separately and the second battery module is charged separately, and receive the fourth detection signal.

2. A battery pack charge and discharge performance detection circuit according to claim 1, characterized in that: The power control module includes a power interface, an electric energy conversion device, a first capacitor, a first inductor and a first transformer; the charging module includes a first diode, a second diode, a first power tube, a second capacitor, a third diode, a first thyristor and a first battery interface; the micro control module includes a first controller; The first end and the second end of the power interface are respectively connected to the first end and the second end of the electric energy conversion device, the third end of the electric energy conversion device is connected to one end of the first inductor and the first end of the primary side of the first transformer through the first capacitor, the fourth end of the electric energy conversion device is connected to the other end of the first inductor and the second end of the primary side of the first transformer, the first end and the second end of the first secondary side of the first transformer are respectively connected to the anode of the second diode and the anode of the first diode, the cathode of the geothermal diode is connected to the anode of the third diode and is connected to the drain of the first power tube and the cathode of the first thyristor through the second capacitor, the source of the first power tube is connected to the anode of the first diode, the cathode of the third diode is connected to the first end of the first battery interface, the anode of the first thyristor is connected to the second end of the first battery interface, the gate of the first power tube is connected to the IO1 end of the first controller, and the control end of the first thyristor is connected to the IO6 end of the first controller.

3. A battery pack charge and discharge performance detection circuit according to claim 2, characterized in that: The charging module further includes a fourth diode, a second power tube, a third capacitor, a third thyristor, a sixth thyristor and a second thyristor; the second battery module includes a second battery interface; the microcontroller module further includes a first inverter; The cathode of the fourth diode is connected to the drain of the second power tube, the source of the second power tube is connected to the anode of the third thyristor and the anode of the sixth thyristor and is connected to the first end of the second secondary side of the first transformer and the second end of the second battery interface through the third capacitor, the cathode of the third thyristor is connected to the first end of the second battery interface and one end of the second thyristor, the other end of the second thyristor is connected to the second end of the first battery interface, the control end of the second thyristor is connected to the control end of the sixth thyristor, the power detection module and the input end of the first inverter, and the output end of the first inverter, the control end of the third thyristor is connected to the input end of the first inverter and the IO6 end of the first controller, and the cathode of the sixth thyristor is connected to the drain of the first power tube.

4. A battery pack charge and discharge performance detection circuit according to claim 3, characterized in that: The first discharge module includes a fifth power tube and a first load; The drain of the fifth power tube is connected to the first end of the first battery interface, the source of the fifth power tube is connected to the second end of the second battery interface through the first load, and the gate of the fifth power tube is connected to the IO5 end of the first controller.

5. A battery pack charge and discharge performance detection circuit according to claim 4, characterized in that: The second discharge module includes a fourth power tube, a third power tube, a fourth thyristor, a fifth thyristor, a fifth diode, a sixth diode and a ninth diode; The drain of the fourth power tube is connected to the first end of the first battery interface, the drain of the third power tube is connected to the first end of the second battery interface, the source of the third power tube is connected to the source of the fourth power tube and the anode of the ninth diode, the cathode of the ninth diode is connected to the first end of the power interface, the anode of the fourth thyristor and the anode of the fifth thyristor are respectively connected to the second end of the second battery interface and the second end of the first battery interface, the cathode of the fourth thyristor and the cathode of the fifth thyristor are both connected to the second end of the power interface, the control end of the fourth thyristor is connected to the gate of the third power tube, the anode of the fifth diode and the IO3 end of the first controller, the control end of the fifth thyristor is connected to the gate of the fourth power tube, the anode of the sixth diode and the IO4 end of the first controller, and the cathode of the fifth diode is connected to the cathode of the sixth diode and the input end of the first inverter.

6. A battery pack charge and discharge performance detection circuit according to claim 5, characterized in that: The electric energy detection module includes a first resistor, a second resistor, a third resistor, a fourth resistor and a first analog switch; A first end of the first resistor is connected to a first end of the first battery interface, a second end of the first resistor is connected to a third end of the first analog switch and connected to the second end of the first battery interface through a second resistor, a first end of the third resistor is connected to the first end of the first analog switch and the first end of the second battery interface, a second end of the third resistor is connected to the eighth end of the first analog switch and connected to the second end of the second battery interface through a fourth resistor, a fourth end, a second end, and a ninth end of the first analog switch are respectively connected to the IO7 end, the IO8 end, and the IO9 end of the first controller, a thirteenth end of the first analog switch is connected to the output end of the first inverter, and a fifth end and a sixth end of the first analog switch are both connected to the input end of the first inverter.

7. A battery pack charge and discharge performance detection circuit according to claim 6, characterized in that: The electric energy detection module further includes a fifth resistor, a seventh diode, a sixth resistor, an eighth diode, a first logic unit, a second logic unit and a third logic unit; The cathode of the seventh diode is connected to the second end of the first resistor through the fifth resistor, the anode of the seventh diode is connected to the A end of the first logic unit and the A end of the second logic unit, the cathode of the eighth diode is connected to the second end of the third resistor through the sixth resistor, the anode of the eighth diode is connected to the B end of the first logic unit and the B end of the third logic unit, the Y end of the first logic unit is connected to the B end of the second logic unit and the A end of the third logic unit, and the Y end of the second logic unit and the Y end of the third logic unit are respectively connected to the IO10 end and IO11 end of the first controller.

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