Power board circuit device and electronic equipment

Abstract

The invention discloses a power board circuit device and electronic equipment, the power board circuit device is applied to a battery system, the battery system comprises a battery pack, and the battery pack comprises a plurality of battery packs; the power board circuit device comprises a battery input control end circuit used for controlling charging and discharging of a plurality of battery packs so as to adjust the current of a battery system; the MOSFET driving circuit is used for switching on or switching off a plurality of MOSFET switches for controlling the charging and discharging circuit; the DC / DC power supply circuit is used for converting a plurality of input voltages into stable output voltages; and the battery pack activation circuit is used for controlling the voltage stability of each battery pack. According to the power board circuit device and the electronic equipment, charging and discharging control over the multiple battery packs can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of power management, and particularly to a power board circuit device and an electronic device. Background Art

[0002] With the rapid development and wide application of electronic devices, the battery system, as the core energy supply part, its performance and reliability directly affect the overall performance of the device. Especially in the fields of electric vehicles, energy storage systems, portable devices, etc., the management and control of the battery system are particularly important. Traditional battery management systems (BMS) usually adopt simple charge and discharge control circuits, which have the following problems:

[0003] 1. Current imbalance: When multiple battery packs are used in parallel, due to the internal resistance and capacity differences between the battery packs, it is easy to cause uneven current distribution, which in turn affects the battery life and system performance. For example, in an electric vehicle, the current imbalance between battery packs will cause some battery packs to age prematurely, reducing the driving range and performance of the whole vehicle.

[0004] 2. Voltage fluctuation: The instability of the input voltage may cause abnormal operation or even damage to the device. Voltage fluctuation will affect the normal operation of electronic devices. Especially in high-precision devices, voltage fluctuation may cause data loss or device failure. For example, in an energy storage system, voltage fluctuation will affect the output stability of the inverter, resulting in the devices connected to the power grid unable to operate normally.

[0005] 3. Energy loss: Traditional power management circuits have low efficiency and large energy loss, which affects the battery life of the device. Energy loss not only reduces the overall efficiency of the system, but also increases the heat generation of the device, further affecting the performance and life of the device. For example, in a portable device, energy loss will shorten the usage time of the device, affecting the user experience.

[0006] 4. Slow response speed: When it is necessary to quickly activate or deactivate the battery pack, the response speed of the traditional circuit is slow and cannot meet the requirements of efficient management. The slow response speed will cause the system unable to adjust in time in case of emergencies, affecting the stability and safety of the system. For example, in an electric vehicle, the slow response speed will cause the braking energy recovery to be untimely, reducing the energy recovery efficiency.

[0007] 5. Insufficient safety: Lack of effective overcurrent and overvoltage protection mechanisms, which is easy to cause battery pack damage or system failure. Insufficient safety will increase the risk of system failure and even cause safety accidents. For example, in an energy storage system, the lack of effective protection mechanisms may cause the battery pack to overheat, catch fire or explode, posing a serious safety hazard.

[0008] 6. Low energy recovery efficiency: During the discharge process of the battery pack, traditional BMS often fails to efficiently recover excess energy (such as braking energy), resulting in energy waste. Low energy recovery efficiency affects the overall energy utilization efficiency of the system and reduces the endurance of the device. For example, in an electric vehicle, low braking energy recovery efficiency leads to energy waste and reduces the vehicle's driving range.

[0009] To solve at least one of the above technical problems, the present invention provides a power board circuit device and an electronic device. Summary of the Invention

[0010] The object of the present invention is to provide a power board circuit device and an electronic device for realizing the charge and discharge control of multiple battery packs.

[0011] The object of the present invention is achieved by the following technical solutions:

[0012] On the one hand, the present invention provides a power board circuit device applied to a battery system, the battery system includes a battery pack, and the battery pack includes multiple battery groups;

[0013] The power board circuit device includes:

[0014] A battery input control terminal circuit for controlling the charge and discharge of multiple battery groups to adjust the input and output power and / or current of the battery system;

[0015] A MOSFET drive circuit for turning on or off multiple MOSFET switches that control the charge and discharge circuit;

[0016] A DC / DC power circuit for converting multiple input voltages into a stable output voltage;

[0017] A battery pack activation circuit for controlling the voltage stability of each battery group.

[0018] The beneficial effects of the above solution are: The present invention realizes the charge and discharge control of multiple battery groups, ensuring the current regulation and balanced management of the battery system; through controlling the on and off of the MOSFET switches, precise control of the charge and discharge circuit is achieved; multiple input voltages are converted into a stable output voltage to ensure the stability of system power supply; the voltage stability of each battery group is controlled to ensure that the battery pack can be quickly activated when needed.

[0019] Further, the battery input control terminal circuit includes: a power control module;

[0020] The power control module is coupled to multiple battery group charge and discharge modules, the power control module is connected to a power supply, and is provided with a B+_MOS_EN pin for receiving the total enable signal of the MOSFET to control the on of the MOSFET switch of the power control module.

[0021] The beneficial effects of the above solution are as follows: The present invention centrally manages the charging and discharging of multiple battery packs, simplifies the control logic, and controls the conduction of the MOSFET switch through the total enable signal, improving the response speed and reliability of the system.

[0022] Further, the battery input control terminal circuit includes: multiple battery pack charging and discharging modules connected in parallel, and the battery pack charging and discharging modules are coupled to the power control module;

[0023] Each battery pack charging and discharging module is connected to a corresponding battery pack, and the battery pack charging and discharging module includes a B+_EN pin for receiving the enable signal of the MOSFET to control the conduction of the MOSFET switch of the battery pack charging and discharging module.

[0024] The beneficial effects of the above solution are as follows: The present invention supports the independent control of multiple battery packs, improving the flexibility and scalability of the system. The MOSFET switch of each battery pack is controlled through an independent enable signal to achieve refined management.

[0025] Further, both the power control module and the battery pack charging and discharging module include two MOSFETs, where one MOSFET is used to control the high-side power switch and the other MOSFET is used to control the low-side power switch.

[0026] The beneficial effects of the above solution are as follows: The present invention realizes bidirectional control of the power path, ensuring the efficiency and safety of the charging and discharging process. By independently controlling the high-side and low-side switches, the management of the power path is optimized.

[0027] Further, one end of the battery pack activation circuit is coupled to the battery pack, and the other end of the battery pack activation circuit is coupled to an external power supply or load;

[0028] The battery pack activation circuit includes:

[0029] A first MOSFET, the gate of the first MOSFET is connected to the BMS1 UP pin through a resistor, and the BMS1UP pin receives an uplink signal for controlling the first MOSFET;

[0030] When the uplink signal is a high-level signal, the first MOSFET conducts, and current flows through the first MOSFET to the battery pack.

[0031] The beneficial effects of the above solution are as follows: The present invention controls the activation of the battery pack through the uplink signal, ensuring that the battery pack can respond quickly when needed. The control logic is simplified, and the reliability of the system is improved.

[0032] Further, the DC / DC power supply circuit includes: a ninth inductor and a voltage regulator, and the ninth inductor is coupled to the voltage regulator;

[0033] The voltage regulator includes a switch terminal, a feedback terminal, an enable terminal, and an input terminal;

[0034] The switch terminal is connected to a second MOSFET through a diode;

[0035] The input terminal is connected to the positive pole of the power input;

[0036] The feedback terminal is connected to the second MOSFET, and the switching frequency and duty cycle of the second MOSFET are adjusted by using a feedback signal for outputting a stable voltage;

[0037] The enable terminal is used to control the working state of the DC / DC power supply circuit.

[0038] The beneficial effects of the above solution are: The present invention realizes efficient voltage conversion and ensures the stability of the output voltage. The switching frequency and duty cycle of the MOSFET are dynamically adjusted through a feedback signal to optimize the power efficiency.

[0039] Further, one end of the MOSFET driving circuit is connected to the positive pole of the power supply, and the other end of the MOSFET driving circuit is connected to the DC / DC power supply circuit through a second MOSFET.

[0040] The beneficial effects of the above solution are: The present invention realizes the connection between the MOSFET driving circuit and the DC / DC power supply circuit and ensures the continuity of the power supply path. The control of the power supply path is optimized through the MOSFET driving circuit.

[0041] Further, one end of the MOSFET driving circuit is connected to the positive pole of the power supply, and the other end of the MOSFET driving circuit is connected to the charge and discharge circuit through a third MOSFET;

[0042] The MOSFET driving circuit includes:

[0043] A main control module, and the main control module includes a BMS+MOS EN pin for receiving the total enable signal of the MOSFET and controlling the conduction of the MOSFET switch of the main control module.

[0044] The beneficial effects of the above solution are: The present invention centrally manages the MOSFET driving circuit and simplifies the control logic. The conduction of the MOSFET switch is controlled through the total enable signal to improve the response speed of the system.

[0045] Further, the MOSFET driving circuit includes:

[0046] Multiple cascaded sub-control modules, where the sub-control modules are coupled to the main control module;

[0047] Each of the sub-control modules is coupled to a corresponding battery pack, and the sub-control module includes:

[0048] A B_MOS_EN pin for receiving an enable signal of the MOSFET to control the conduction of the MOSFET switch of the sub-control module;

[0049] Both the main control module and the sub-control module include two MOSFETs, where one MOSFET is used to control the high-side power switch and the other MOSFET is used to control the low-side power switch.

[0050] The beneficial effects of the above solution are: The present invention supports independent control of multiple battery packs, improving the flexibility and scalability of the system. By controlling the MOSFET switches of each sub-control module through independent enable signals, fine-grained management is achieved.

[0051] On the other hand, the present invention provides an electronic device including the above-mentioned power board circuit device.

[0052] The beneficial effects of the above solution are: The present invention realizes efficient management of the battery system by integrating the power board circuit device, improving the performance and reliability of the device.

[0053] Compared with the prior art, the beneficial effects of the present invention at least include:

[0054] The present invention realizes fine-grained management of the power path through MOSFETs and enable signals; improves the flexibility and scalability of the system through modular design (such as the main control module and the sub-control module); ensures the stability of the output voltage through the DC / DC power circuit and feedback regulation; realizes fast response and control through the battery pack activation circuit and the MOSFET drive circuit; and ensures the safety of the charging and discharging process through the design of high-side and low-side MOSFETs. Description of the Drawings

[0055] Figure 1 is a schematic structural diagram of the battery input control terminal circuit according to an embodiment of the present invention.

[0056] Figure 2 is a schematic structural diagram of the MOSFET drive circuit according to an embodiment of the present invention.

[0057] Figure 3 is a schematic structural diagram of the DC / DC power circuit according to an embodiment of the present invention.

[0058] Figure 4 is a schematic structural diagram of the battery pack activation circuit according to an embodiment of the present invention.

[0059] Figure 5 It is a schematic structural diagram of a power board circuit device according to an embodiment of the present invention. Detailed implementation manners

[0060] Now, example embodiments will be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this invention will be more complete and comprehensive, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals in the figures denote like or similar structures, and thus their repetitive description will be omitted.

[0061] The words expressing positions and directions described in the present invention are all illustrated by taking the accompanying drawings as examples, but can also be changed according to needs, and all the changes made are included in the protection scope of the present invention.

[0062] The electronic device of the present invention includes a power board circuit device. When applied, the power board circuit device is applied to a battery system. The battery system includes a battery pack, the battery pack includes a plurality of battery groups, and each battery group includes a plurality of batteries connected in series.

[0063] Referring to Figure 5 , the power board circuit device of the present invention includes: a battery input control terminal circuit, a MOSFET drive circuit, a DC / DC power circuit, and a battery pack activation circuit.

[0064] Through modular design (such as the battery input control terminal circuit, the MOSFET drive circuit, etc.), the charging and discharging process is optimized to achieve efficient management of the battery system. It supports independent control of multiple battery groups, is suitable for battery systems of different scales and configurations, and adapts to different application scenarios. Through the DC / DC power circuit and the battery pack activation circuit, the stability and reliability of the system power supply are ensured, and voltage fluctuations are avoided. Through precise current and voltage control, the service life of the battery group is extended. Through the MOSFET drive circuit and the battery pack activation circuit, multiple protections (such as overcurrent, overvoltage protection functions, etc.) are provided to ensure the safety of the system.

[0065] When applied, the power board circuit device includes a BMS+MOS EN module for controlling the MOSFET switch of the battery management system (BMS); a plurality of B_MOS_EN modules for controlling the MOSFET switches of multiple battery groups to achieve balanced charging and discharging of the battery groups; a power interface for connecting to a power supply; an MSI UP module for initializing and upgrading the battery management system; a plurality of pins for connecting to external devices or signals; a plurality of battery group interfaces for connecting to battery groups and supporting high-current transmission; a plurality of battery interfaces for connecting and managing batteries, such as monitoring and controlling the status of each battery cell, including voltage, current, and temperature.

[0066] Reference Figure 1 The battery input control terminal circuit of the present invention is used to control the charging and discharging of multiple battery packs to adjust the input and output power and / or current of the battery system. Specifically, by precisely controlling the charging and discharging current, overcharging or over-discharging of the battery packs is avoided, and the battery life is extended; the current balance between multiple battery packs is ensured, and individual battery packs are prevented from being damaged due to current imbalance; independent control of multiple battery packs is supported, which is applicable to battery systems of different scales and configurations.

[0067] During application, the battery input control terminal circuit includes: a power control module. Further, the battery input control terminal circuit includes: multiple parallel-connected battery pack charging and discharging modules, and the battery pack charging and discharging modules are coupled to the power control module.

[0068] The power control module is coupled to multiple battery pack charging and discharging modules, the power control module is connected to the power supply, and is provided with a B+_MOS_EN pin for receiving the total enable signal of the MOSFET to control the conduction of the MOSFET switch of the power control module. Each battery pack charging and discharging module is connected to the corresponding battery pack, and the battery pack charging and discharging module includes a B+_EN pin for receiving the enable signal of the MOSFET to control the conduction of the MOSFET switch of the battery pack charging and discharging module. Among them, the total enable signal of the MOSFET and the enable signal of the MOSFET are generally generated by a microcontroller (MCU) or other control logics to manage the working state of the battery pack.

[0069] In addition, both the power control module and the battery pack charging and discharging module include two MOSFETs, one of which is used to control the high-side power switch and the other is used to control the low-side power switch.

[0070] During application, the MOSFET model is FKD3006, which is used for switching control to ensure that the battery pack can be connected or disconnected when needed. Multiple 2.2-ohm resistors (such as resistor R165, resistor R166, resistor R157, resistor R159, resistor R168, resistor R209) are used in the power control module and the battery pack charging and discharging module to adjust the current, prevent overcurrent situations, and protect the circuit and the battery pack. It can be seen that the battery input control terminal circuit realizes the connection, disconnection, current adjustment and protection of multiple battery packs through the combination of MOSFET and resistor, ensuring that the battery pack can work safely and efficiently when needed.

[0071] Reference Figure 4, the battery pack activation circuit of the present invention is used to control the voltage stability of each battery pack. Specifically, it can quickly activate the battery pack when needed to ensure the timely response of the system; by controlling the voltage of the battery pack, it can avoid equipment damage or performance degradation caused by unstable voltage; when the voltage of the battery pack is abnormal, it can cut off the circuit in time to protect the battery and the system.

[0072] In application, one end of the battery pack activation circuit is coupled to the battery pack, and the other end of the battery pack activation circuit is coupled to an external power supply or load.

[0073] The battery pack activation circuit includes: a first MOSFET. The gate of the first MOSFET is connected to the BMS1 UP pin through a resistor. The BMS1 UP pin receives an uplink signal for controlling the first MOSFET. Among them, the first MOSFET is an N-channel MOSFET, and the uplink signal generally comes from the battery management system (BMS). When the uplink signal is a high-level signal, the first MOSFET is turned on, and current flows through the first MOSFET to the battery pack, thereby activating the battery pack.

[0074] In actual application, by setting a resistor R46 with a resistance value of 1K and a resistor RS4 with a resistance value of 10K at the gate of the first MOSFET, it is ensured that it conducts under appropriate conditions. In addition, a 5.1V Zener diode is set to protect the first MOSFET Q24 to prevent excessive voltage. Further, diodes are set at different signal nodes to prevent reverse current and protect other components in the circuit. It can be seen that the resistors and diodes in the circuit ensure that the current and voltage are within a safe range to prevent overcurrent or overvoltage from damaging components.

[0075] Reference Figure 3 , the DC / DC power supply circuit of the present invention is used to convert multiple input voltages into a stable output voltage. Specifically, it ensures the stability of system power supply and avoids equipment failures caused by input voltage fluctuations; through DC / DC conversion technology, it improves the energy conversion efficiency and reduces energy loss; it supports multiple input voltages and is suitable for different battery pack configurations and application scenarios.

[0076] In application, the DC / DC power supply circuit includes: a ninth inductor and a voltage regulator, and the ninth inductor is coupled to the voltage regulator.

[0077] Among them, the voltage regulator includes a switch terminal, a feedback terminal, an enable terminal, and an input terminal. Specifically, the switch terminal is connected to a second MOSFET through a diode (a unidirectional TVS diode TVS1 with a rated voltage of 24V); the input terminal is connected to the positive pole of the power input; the feedback terminal is connected to the second MOSFET, and the feedback signal is used to adjust the switching frequency and duty cycle of the second MOSFET for outputting a stable voltage; the enable terminal is used to control the working state of the DC / DC power supply circuit.

[0078] In practical applications, the input voltage enters the DC / DC power supply circuit through the positive pole of the power supply, and is preliminarily filtered and rectified through a diode and a capacitor. A plurality of capacitors (such as capacitor C99, capacitor C107, capacitor C102, capacitor C97) and an inductor form a filter network to smooth the output voltage, and a plurality of resistors (such as resistor R236, resistor R237, resistor R238) form a resistor network for current limiting and voltage division to ensure that the circuit operates within a safe range. Specifically, the capacitor includes at least one 22uF / 35V capacitor and a 100uF / 35V capacitor. The resistor includes a 499KΩ 1% resistor and an 11KΩ 1% resistor.

[0079] In some preferred embodiments, the second MOSFET performs high-speed switching under the control of the voltage regulator IC6 to convert the input voltage into high-frequency pulses. The high-frequency pulses are filtered through the ninth inductor L9 and a capacitor network to obtain a stable DC output voltage. The feedback signal FB of the voltage regulator IC6 is used to adjust and control the output of the DC / DC power supply circuit to ensure voltage stability.

[0080] In some other embodiments, in order to improve the power conversion efficiency and reduce energy loss, the MOSFET of the present invention is a high-frequency switch (such as GaN MOSFET or SiC MOSFET). Compared with the traditional silicon-based MOSFET, the high-frequency switch has a higher switching frequency and a lower on-resistance, which can significantly reduce the switching loss and on-loss. Specifically, GaN or SiC MOSFET is used as the switching device, and a high-frequency switch circuit is set up to ensure the stable operation of the GaN MOSFET or SiC MOSFET at high frequencies, increase the switching frequency to the hundreds of kHz or even MHz level, reduce the size of the inductor and capacitor, which can not only improve the power conversion efficiency, but also reduce the volume and weight of the circuit. During application, the high-frequency switch circuit selects high-frequency inductors and capacitors, optimizes the layout and wiring of the high-frequency switch circuit, and reduces the influence of parasitic parameters. In practical applications, the switching frequency and duty cycle can be dynamically adjusted according to the input voltage, output voltage and load current to optimize the power conversion efficiency.

[0081] Reference Figure 2 , the MOSFET drive circuit of the present invention is used to conduct or turn off a plurality of MOSFET switches that control the charge and discharge circuit. Specifically, through the rapid conduction and turning off of the MOSFET switch, efficient management of the charge and discharge process is achieved; the MOSFET has a low on-resistance, which can reduce energy loss and improve system efficiency; in the case of overcurrent or short circuit, the MOSFET can be quickly turned off to protect the battery and the circuit.

[0082] One end of the MOSFET driving circuit is connected to the positive pole of the power supply. The other end of the MOSFET driving circuit is connected to the DC / DC power supply circuit through a second MOSFET, and the other end of the MOSFET driving circuit is connected to the charge and discharge circuit through a third MOSFET. During application, the second MOSFET can be reused as the third MOSFET.

[0083] The MOSFET driving circuit includes: a main control module. Further, the MOSFET driving circuit includes: a plurality of cascaded sub-control modules, and the sub-control modules are coupled to the main control module.

[0084] Both the main control module and the sub-control module include two MOSFETs. One of the MOSFETs is used to control the high-side power switch, and the other MOSFET is used to control the low-side power switch.

[0085] The main control module includes a BMS+MOS EN pin, which is used to receive the total enable signal of the MOSFET (generally from the microcontroller MCU of the BMS) to control the conduction of the MOSFET switch of the main control module. Preferably, the main control module is connected to a 1K ohm resistor for voltage regulation in the battery management system to provide a stable 28V voltage output.

[0086] Each sub-control module is coupled to a corresponding battery pack. The sub-control module includes: a B_MOS_EN pin, which is used to receive the enable signal of the MOSFET (generally from the microcontroller MCU of the BMS) to control the conduction of the MOSFET switch of the sub-control module.

[0087] In some preferred embodiments, the MOSFET driving circuit realizes the management and control of the power supply and the battery through components such as MOSFETs, resistors, diodes, and transistors. Specifically, the power switch is controlled through the second MOSFET, the charge and discharge of the battery pack are managed through the main control module, the sub-control module, and the related resistor network, the voltage is regulated and protected through the diode network, and the signals are processed and amplified through the MOSFETs of the main control module and the sub-control module.

[0088] On the other hand, in the existing battery management system, the battery pack will generate excess energy during the discharge process (especially in electric vehicles or energy storage systems), such as the reverse current generated during braking or sudden load reduction. This energy is usually dissipated through resistors or wasted in the form of heat. To improve the energy utilization efficiency, this solution proposes to introduce an energy recovery circuit during the discharge process of the battery pack to recover and store the excess energy for subsequent use by the system.

[0089] The power board circuit device of the present application may further include an energy recovery circuit and an energy release circuit. The energy recovery circuit can recover and store the excess energy (such as braking energy) generated during the discharge of the battery pack into a supercapacitor or a backup battery, thereby improving the energy utilization efficiency of the system.

[0090] During application, the energy recovery circuit and the energy release circuit are integrated with the existing battery management system (BMS). Through the CAN bus or other communication interfaces, data exchange and control instruction transmission between the energy recovery circuit and the energy release circuit and the MCU in the BMS are realized.

[0091] During actual application, by recovering the excess energy generated during the discharge process of the battery pack, energy waste is reduced, and the overall energy utilization efficiency of the system is improved; in addition, the number of charge and discharge cycles of the battery pack can be reduced, the burden on the battery pack can be reduced, and the service life of the battery can be extended; at the same time, the fast charge and discharge characteristics of the supercapacitor can meet the instantaneous high-power demand and improve the dynamic response ability of the system.

[0092] The energy recovery circuit of the present invention includes a reverse current detection module, an energy conversion module, an energy storage module, and an energy management module.

[0093] The reverse current detection module of the present invention is used to detect the reverse current generated during the discharge of the battery pack.

[0094] Specifically, during the discharge of the battery pack, when the load suddenly decreases or the system enters the braking state, a reverse current will be generated. The reverse current detection module monitors the current direction of the battery pack in real time through a current sensor. When a reverse current is detected, the energy recovery circuit is activated.

[0095] The energy conversion module of the present invention converts the reverse current into a storable energy form (such as direct current).

[0096] Specifically, the reverse current is subjected to energy conversion through a bidirectional DC / DC converter. The bidirectional DC / DC converter converts the reverse current into a DC voltage suitable for storage and outputs it to the energy storage module. The working mode of the bidirectional DC / DC converter is controlled by the energy management module to ensure the high efficiency and stability of energy conversion. During application, the energy conversion module is a bidirectional DC / DC converter, and high-efficiency switching devices (such as GaN MOSFETs) are used to reduce the loss during the energy conversion process.

[0097] The energy storage module of the present invention stores the converted energy into a supercapacitor or a backup battery.

[0098] Specifically, the converted energy is stored in a supercapacitor or a backup battery. The supercapacitor has a high power density and fast charge and discharge characteristics, making it suitable for storing instantaneous high energy. The energy storage module ensures the safety and efficiency of the energy storage process through voltage and current monitoring.

[0099] During application, the strategies for energy recovery and release can be dynamically adjusted according to parameters such as the voltage, current, and temperature of the battery pack. In actual applications, fuzzy control and PID control algorithms are introduced to optimize the response speed and stability of energy recovery and release.

[0100] First, the voltage, current, and temperature of the battery pack are collected.

[0101] During application, a high-precision voltage sensor is used to monitor the voltage of the battery pack in real time. The voltage sensor converts the analog signal into a digital signal through an ADC (analog-to-digital converter) for use by the control algorithm module. A Hall effect current sensor is used to monitor the charge and discharge current of the battery pack in real time. The current sensor converts the analog signal into a digital signal through an ADC for use by the control algorithm module. An NTC thermistor or an infrared temperature sensor is used to monitor the temperature of the battery pack in real time. The temperature sensor converts the analog signal into a digital signal through an ADC for use by the control algorithm module.

[0102] Next, at the initial operation of the system, the voltage, current, and temperature of the battery pack are used as input variables of the fuzzy controller.

[0103] During application, the input variables (voltage, current, temperature) are converted into fuzzy variables through membership functions. For example, the voltage can be divided into three fuzzy levels: "low", "medium", and "high". Based on expert experience or historical data, a fuzzy rule base is established. For example: if the voltage is "low" and the current is "high", the energy recovery strategy is "fast recovery"; if the temperature is "high" and the current is "low", the energy release strategy is "slow release". The output of the fuzzy rule base is a fuzzy variable. For example, both the energy release and energy recovery currents can be divided into three fuzzy levels: "low", "medium", and "high". At the same time, the output of the fuzzy controller is converted into a specific control signal through a defuzzification algorithm (such as the centroid method) to adjust the strategies for energy recovery and release.

[0104] Then, after the system has been running for some time, the current voltage, current, and temperature of the battery pack are used as input variables of the PID controller to further adjust the strategies for energy recovery and release.

[0105] During application, according to the deviations of the current voltage, current, temperature from the set values, the strategies for energy recovery and release are adjusted proportionally. Further, according to the accumulated values of the deviations, the strategies for energy recovery and release are adjusted to eliminate the steady-state error. Even further, according to the rate of change of the deviations, the strategies for energy recovery and release are adjusted to improve the response speed of the system. Preferably, the weighted sum of the deviations of the voltage, current, temperature from the set values, the accumulated values of the deviations, and the rate of change of the deviations is used as the output of the PID controller to adjust the strategies for energy recovery and release.

[0106] The energy management module of the present invention controls the processes of energy recovery, storage and release.

[0107] Specifically, the energy management module is responsible for controlling the entire energy recovery process. It decides when to initiate energy recovery and when to release the stored energy according to the load demand of the system and the state of the battery pack. When the system requires additional energy (such as during acceleration or increased load), the energy management module releases the stored energy back to the battery pack or directly supplies the load, reducing the dependence on the main battery pack.

[0108] During application, the energy recovery circuit can automatically switch its working mode according to the real-time state of the system. For example, during the discharge process, it automatically enters the energy recovery mode, and during the charging process, it automatically enters the energy release mode. Preferably, the energy management module preferentially uses the recovered energy according to the energy demand of the system and the state of the battery pack, reducing the consumption of the main battery pack. In addition, the energy recovery circuit has overvoltage, overcurrent and overtemperature protection functions to ensure the safety of the energy recovery and storage processes.

[0109] During actual application, when energy recovery is required, the energy recovery circuit is started. The energy recovery circuit converts the excess energy (such as braking energy) generated during the discharge of the battery pack into a storable energy form through a bidirectional DC / DC converter and stores it in a super capacitor or a backup battery. At the same time, according to the output of the control algorithm, the current and voltage of the energy recovery are dynamically adjusted to ensure the efficiency and stability of the energy recovery process. When energy release is required, the energy release circuit is started. The energy release circuit releases the stored energy back to the battery pack or directly supplies the load through a bidirectional DC / DC converter. At the same time, according to the output of the control algorithm, the current and voltage of the energy release are dynamically adjusted to ensure the stability and safety of the energy release process.

[0110] It can be seen that by integrating an energy recovery circuit, the present invention can effectively recover and store excess energy, significantly improving the energy utilization efficiency of the system. It is applicable to multiple fields such as electric vehicles, energy storage systems, and industrial equipment, and has broad market prospects. For example, during the braking of an electric vehicle, the braking energy is recovered and stored in a supercapacitor for use during acceleration or climbing; in an energy storage system, the excess energy generated when the load suddenly decreases is recovered to reduce energy waste; during the start-stop process of industrial equipment, the reverse current generated by the motor is recovered to improve the energy utilization efficiency of the equipment.

[0111] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Without departing from the principle and purpose of the present invention, those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the invention, and all such changes should fall within the protection scope of the claims of the present invention.

Claims

1. A power board circuit device, characterized in that, Applied to a battery system, the battery system includes a battery pack, and the battery pack includes a plurality of battery groups; The power board circuit device includes: A battery input control terminal circuit for controlling the charging and discharging of a plurality of battery groups to adjust the input / output power and / or current of the battery system; A MOSFET drive circuit for turning on or off a plurality of MOSFET switches that control the charging and discharging circuit; A DC / DC power circuit for converting a plurality of input voltages into a stable output voltage; A battery pack activation circuit for controlling the voltage stability of each battery group.

2. The power board circuit device according to claim 1, characterized in that, The battery input control terminal circuit includes: a power control module; The power control module is coupled to a plurality of battery group charging and discharging modules, the power control module is connected to a power supply, and is provided with a B+_MOS_EN pin for receiving the total enable signal of the MOSFET to control the conduction of the MOSFET switch of the power control module.

3. The power board circuit device according to claim 2, wherein The battery input control terminal circuit includes: a plurality of parallel-connected battery group charging and discharging modules, and the battery group charging and discharging modules are coupled to the power control module; Each of the battery group charging and discharging modules is connected to a corresponding battery group, and the battery group charging and discharging module includes a B+_EN pin for receiving the enable signal of the MOSFET to control the conduction of the MOSFET switch of the battery group charging and discharging module.

4. The power board circuit device according to claim 3, characterized in that, Both the power control module and the battery group charging and discharging module include two MOSFETs, one of the MOSFETs is used to control the high-side power switch, and the other MOSFET is used to control the low-side power switch.

5. The power board circuit device according to claim 1, characterized in that, One end of the battery pack activation circuit is coupled to the battery pack, and the other end of the battery pack activation circuit is coupled to an external power supply or a load; The battery pack activation circuit includes: A first MOSFET, the gate of the first MOSFET is connected to the BMS1 UP pin through a resistor, and the BMS1UP pin receives an uplink signal for controlling the first MOSFET; When the uplink signal is a high-level signal, the first MOSFET conducts, and current flows through the first MOSFET to the battery pack.

6. The power board circuit device according to claim 1, characterized in that, The DC / DC power circuit includes: a ninth inductor and a voltage regulator, and the ninth inductor is coupled to the voltage regulator; The voltage regulator includes a switch terminal, a feedback terminal, an enable terminal, and an input terminal; The switch terminal is connected to a second MOSFET through a diode; The input terminal is connected to the positive pole of the power input; The feedback terminal is connected to the second MOSFET, and uses the feedback signal to adjust the switching frequency and duty cycle of the second MOSFET for outputting a stable voltage; The enable terminal is used to control the working state of the DC / DC power circuit.

7. The power board circuit device according to claim 1, characterized in that One end of the MOSFET drive circuit is connected to the positive pole of the power supply, and the other end of the MOSFET drive circuit is connected to the DC / DC power circuit through a second MOSFET.

8. The power board circuit device according to claim 1, characterized in that, One end of the MOSFET drive circuit is connected to the positive pole of the power supply, and the other end of the MOSFET drive circuit is connected to the charging and discharging circuit through a third MOSFET. The MOSFET drive circuit includes: The main control module, the main control module includes a BMS+MOS EN pin for receiving the total enable signal of the MOSFET and controlling the conduction of the MOSFET switch of the main control module.

9. The power board circuit device according to claim 8, characterized in that, The MOSFET drive circuit includes: A plurality of cascaded sub-control modules, the sub-control modules are coupled to the main control module; Each of the sub-control modules is coupled to a corresponding battery pack, and the sub-control module includes: A B_MOS_EN pin for receiving the enable signal of the MOSFET and controlling the conduction of the MOSFET switch of the sub-control module; Both the main control module and the sub-control module include two MOSFETs, one of the MOSFETs is used to control the high-side power switch, and the other MOSFET is used to control the low-side power switch.

10. An electronic device, comprising the power board circuit device according to any one of claims 1 to 9.

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