Battery charging and discharging integrated management system and method

Abstract

The present application provides a battery charging and discharging integrated management system and method, the management system includes a main control unit, a battery management unit, a battery module and at least one startup module; the battery management unit controls the battery module to supply power to the power-consuming device through the discharge port based on the half-split mode, and charges through the charging device connected to the charging port; at least one startup module starts the battery management unit through at least one of the following actions: manual start, connection to the charging device, receiving the high / low level signal of the main control unit; there is no communication connection between the main control unit and the battery management unit. The technical solution of the present application can start or shut down the battery management unit independently without occupying the computing and communication resources of the main control unit, and realize independent control of charging and discharging through the battery management unit.

Description

Technical Field

[0001] The present application belongs to the field of new energy vehicle technology, and further relates to vehicle-mounted battery management technology, specifically providing a battery charging and discharging integrated management system and method. Background Art

[0002] Comprehensive management of charging and discharging of battery modules of electric vehicles is an important part of new energy vehicle control technology. Reasonable charging and discharging control of battery modules is not only necessary to ensure the safe operation of new energy vehicles, but also can effectively extend the health and service life of battery modules.

[0003] Existing battery management solutions generally monitor the battery module continuously through the battery management chip, feed back the collected data to the vehicle's main control unit (VCU), and then receive the VCU's control instructions through the communication line. However, as the core of the vehicle control, the VCU needs to undertake a large number of communication and computing tasks, including communicating with various sensors of the vehicle, receiving various sensor data, and performing vehicle path planning, navigation, posture perception, environmental modeling, emergency monitoring, etc. If the monitoring of the battery module occupies unnecessary communication and computing resources, it will inevitably affect the accuracy and safety of the vehicle control. Summary of the invention

[0004] The purpose of this application is to provide a battery charging and discharging integrated management system and method, which can autonomously start the charging and discharging control function without occupying the computing resources and communication resources of the main control unit, and independently control the charging status of the charging port and the discharging port according to the actual application scenario.

[0005] A first aspect of the present application provides a battery charging and discharging integrated management system, including a main control unit, a battery management unit, a battery module and at least one starting module;

[0006] The battery management unit controls the battery module to supply power to the power-consuming device through the discharge port based on the half-split mode, and to charge the battery module through the charging device connected to the charging port;

[0007] The at least one starting module starts the battery management unit by at least one of the following actions: receiving a high level or low level signal from the main control unit, manually starting, or connecting to a charging device;

[0008] There is no communication connection between the main control unit and the battery management unit.

[0009] Furthermore, the half-split mode is specifically as follows: the charging port and the discharging port have a charging and discharging positive pole at the same port, and a charging negative pole and a discharging negative pole at separate ports; the charging and discharging positive pole is connected to the positive pole of the battery module, and the charging negative pole and the discharging negative pole are switched on and off with the negative pole of the battery module under the control of the battery management unit.

[0010] Furthermore, the battery management unit includes a battery management chip, a charging control circuit and a discharging control circuit;

[0011] The battery management chip includes a power input terminal, a mode switching terminal, a charging control terminal and a discharging control terminal, wherein the power input terminal is connected to the positive electrode of the battery, the mode switching terminal is used to receive a start signal sent by the at least one start module, the charging control terminal is used to output a charging control signal, and the discharging control terminal is used to output a discharging control signal;

[0012] The charging control circuit controls the connection and disconnection between the charging negative electrode and the negative electrode of the battery module based on the charging control signal and the access status of the charging device;

[0013] The discharge control circuit controls the connection and disconnection between the discharge negative electrode and the negative electrode of the battery module based on the discharge control signal.

[0014] Preferably, the start signal is a high-level signal having the same voltage as the positive electrode of the battery module.

[0015] Preferably, the startup module includes at least one of the following circuits:

[0016] The main control unit start circuit, manual start circuit, and charging equipment are connected to the start circuit;

[0017] The main control unit startup circuit connects the positive electrode of the battery module and the mode switching end when receiving a high level or low level signal from the main control unit, otherwise disconnects the positive electrode of the battery module and the mode switching end;

[0018] The manual start circuit is used to manually connect or disconnect the positive electrode of the battery module and the mode switching end;

[0019] The charging device access start circuit connects the positive electrode of the battery module and the mode switching end when the charging device is connected, and disconnects the positive electrode of the battery module and the mode switching end when the charging device is removed.

[0020] Furthermore, the charging control circuit includes a first switch tube and a first relay;

[0021] The G pole of the first switching tube is used to input the charging control signal of the charging control end, the S pole is connected to one end of the switch of the first relay, the D pole is connected to one end of the coil of the first relay, the other end of the switch of the first relay is connected to the negative pole of the battery module, and the other end of the coil of the first relay is connected to the positive pole of charging and discharging.

[0022] Preferably, the charging control circuit further includes a charging protection circuit;

[0023] The charging protection circuit includes a charging self-protection optocoupler and a current limiting resistor, wherein the first input end of the charging self-protection optocoupler is connected to the positive electrode of the charging device through the current limiting resistor, the second input end is connected to the negative electrode of the charging device, the first output end is connected to the charging control end, and the second output end is connected to the enable end of the first switch tube.

[0024] Furthermore, the discharge control circuit includes a second switch tube and a second relay;

[0025] The G pole of the second switch tube is connected to the discharge control end, the S pole is connected to the negative pole of the battery, the D pole is connected to one end of the coil of the second relay, the other end of the coil of the second relay is connected to the charge and discharge positive pole, and the two ends of the switch of the second relay are respectively connected to the negative pole of the battery and the discharge negative pole. Preferably, the main control unit is powered by the battery module.

[0026] The second aspect of the present application provides a battery charging and discharging integrated management method, which manages the charging and discharging process of the battery module through the aforementioned battery charging and discharging integrated management system, including the following operations:

[0027] Operation 1: when the battery management unit is in a dormant state, disconnect the negative electrode of the battery module from the charging negative electrode, and disconnect the negative electrode of the battery module from the discharging negative electrode;

[0028] Operation 2, starting the battery management unit based on at least one of the following actions: receiving a high level or low level signal from the main control unit, manually starting, or connecting to a charging device;

[0029] Operation three, when the battery management unit is in the startup state, the battery management unit controls the connection and disconnection of the charging negative electrode and the negative electrode of the battery module, as well as the connection and disconnection of the discharging negative electrode and the negative electrode of the battery module, wherein when the charging device is not connected, the charging negative electrode and the negative electrode of the battery module are disconnected.

[0030] The battery charging and discharging integrated management system and method provided in the embodiments of the present application can automatically start according to various application scenarios without any communication connection between the main control unit and the battery management unit, and select corresponding charging and discharging modes to independently control the charging and discharging of the battery module, effectively saving the communication and computing resources of the main control unit, which is conducive to improving the accuracy and safety of the whole vehicle control. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The following is an architecture diagram of a battery charging and discharging integrated management system provided according to an embodiment of the present application.

[0032] Figure 2 A schematic diagram of the on-off state of the charging and discharging ports when the battery management unit according to an embodiment of the present application is in a dormant state;

[0033] Figure 3 A schematic diagram of the on-off state of the charging and discharging ports when the battery management unit according to an embodiment of the present application is in a discharging state;

[0034] Figure 4 A schematic diagram of the on-off state of the charging and discharging ports when the battery management unit according to an embodiment of the present application is in a charging and discharging state;

[0035] Figure 5 A control state transition flow chart of a battery charging and discharging integrated management system provided according to an embodiment of the present application;

[0036] Figure 6 A circuit schematic diagram of a charging device connected to a starting circuit according to an embodiment of the present application;

[0037] Figure 7 A circuit schematic diagram of a main control unit startup circuit provided according to an embodiment of the present application;

[0038] Figure 8 A circuit schematic diagram of a charging control circuit provided according to an embodiment of the present application;

[0039] Fig. 9 A circuit schematic diagram of a discharge control circuit provided according to an embodiment of the present application;

[0040] Fig.10 It is a schematic diagram of a comprehensive battery charging and discharging management method provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0041] Hereinafter, the present application will be further described based on preferred embodiments with reference to the accompanying drawings.

[0042] In addition, various components in the drawings are enlarged or reduced in size for ease of understanding, but this practice is not intended to limit the scope of protection of the present application.

[0043] In the description of the embodiments of the present application, it should be noted that in order to distinguish different units, words such as first and second are used in this specification, but these are not limited to the order of manufacturing, nor can they be understood as indicating or implying relative importance. Their names may be different in the detailed description and claims of this application.

[0044] The vocabulary in this specification is used to illustrate the embodiments of the present application, but is not intended to limit the present application. It should also be noted that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, an indirect connection through an intermediate medium, or a connection between the two elements. For those skilled in the art, the specific meanings of the above terms in this application can be specifically understood.

[0045] The present application provides a battery charging and discharging integrated management system. Figure 1 In some embodiments, the architecture of the battery charging and discharging integrated management system is shown, such as Figure 1 As shown, the battery charging and discharging integrated management system includes a main control unit, a battery management unit, a battery module and at least one starting module ( Figure 1 1, 2 and 3 respectively), and it is particularly important to point out that Figure 1 As shown, there is no communication connection between the main control unit and the battery management unit, that is, there is no common communication connection such as CAN, LIN, SENT, etc. between the main control unit and the battery management unit. Instead, the battery management unit autonomously performs sleep, startup and control of the charging and discharging process according to the specific charging and discharging scenario.

[0046] In some specific embodiments, the integrated battery charging and discharging management system provided in the present application can be applied to the charging and discharging management of the on-board batteries of new energy vehicles. At this time, the main control unit is generally the vehicle controller (VCU) of the new energy vehicle, and the electrical equipment can be the motor that drives the new energy vehicle.

[0047] Furthermore, in an embodiment of the present application, the battery management unit controls the battery module based on the half-split mode to supply power to the power-consuming device through the discharge port, and to charge the device through the charging port.

[0048] Among the existing solutions for charging and discharging management of onboard batteries of new energy vehicles, the half-split mode is a more common one, which can realize independent charging and discharging operations without constructing a completely separate charging and discharging architecture. In some specific embodiments, the half-split mode can be as follows Figure 1The arrangement is shown as follows: the charging port and the discharging port have the same charging and discharging positive electrode B+, and the charging and discharging positive electrode B+ is directly connected to the positive electrode of the battery module; the charging negative electrode C- and the discharging negative electrode P- are separated from each other, and each is switched on and off with the negative electrode of the battery module (represented by the grounded B- in the figure) under the control of the battery management unit, thereby realizing comprehensive management of battery charging and discharging.

[0049] In addition, if Figure 1 As shown, in some preferred embodiments, the main control unit is powered by a battery module (generally, when the power supply voltage of the main control unit is inconsistent with the output voltage of the battery module, voltage conversion is also required).

[0050] The following is a detailed introduction to the various parts of the battery charging and discharging integrated management system in conjunction with the accompanying drawings.

[0051] [Autonomous start mechanism]

[0052] Since the integrated charge and discharge management system provided by the present application does not need to keep the battery management chip in working state all the time, but only needs to start it when actual charging or discharging demand occurs, it is necessary to design the start-up mechanism based on various charging and discharging application scenarios. For this reason, in the embodiment of the present application, the start-up module includes Figure 1 One, two or three of the starting modules 1, 2 and 3 shown, wherein the starting module 1 outputs a starting signal to the battery management unit after receiving a high level or low level signal from the main control unit; the starting module 2 sends a starting signal to the battery management unit after a button is manually pressed; and the starting module 3 sends a starting signal to the battery management unit when it detects that a charging device is connected.

[0053] The above-mentioned starting module can automatically start the management of battery module charging and discharging according to various application scenarios without any communication connection between the main control unit and the battery management unit, and disconnect the negative electrode of the battery module from the charging negative electrode C- and the discharging negative electrode P- when charging and discharging are not required, so as to ensure that the charging and discharging ports are not charged. This control method of the charging and discharging process is particularly suitable for the comprehensive management of on-board batteries of new energy vehicles, because for new energy vehicles driven by motors, their main control units (VCU) need to undertake a large number of communication and computing tasks, such as communicating with various sensors of the vehicle, receiving various sensor data, and performing vehicle path planning, navigation, posture perception, environmental modeling, emergency monitoring, etc. Therefore, autonomously starting and taking over the management of the battery will effectively save the communication and computing resources of the main control unit, which is conducive to improving the accuracy and safety of the whole vehicle control.

[0054] Specifically, for the charge and discharge management of the on-board battery of new energy vehicles, the above three starting modules correspond to three scenarios where charging and discharging need to be started: Scenario 1, after the VCU of the whole vehicle is started, the battery management unit is started by sending a high-level or low-level signal to the starting module 1, and the battery management unit takes over the control of charging and discharging; Scenario 2, when the VCU of the whole vehicle is in sleep or standby, it is necessary to detect the charging and discharging functions and collect information, or when the on-board battery is needed as a power source for other electrical equipment, the battery management unit is manually started; Scenario 3, when the VCU of the whole vehicle is in sleep or standby, the charging interface is inserted into the charging connector. At this time, the battery management unit is started by the charging device access action and charge and discharge management is performed.

[0055] The battery management unit is activated after receiving a start signal from at least one of the above-mentioned start modules, and takes over the charge and discharge management of the battery module (i.e., switching the on and off states between the charging negative electrode C-, the discharging negative electrode P- and the negative electrode of the battery module). If no start signal is received, it enters a sleep state and ensures that the charging negative electrode C-, the discharging negative electrode P- and the negative electrode of the battery module are all in a disconnected state.

[0056] In some preferred embodiments, each of the above-mentioned starting modules includes the following circuits: starting module 1 includes a main control unit starting circuit, starting module 2 includes a manual starting circuit, and starting module 3 includes a charging device access starting circuit, wherein the main control unit starting circuit connects the positive pole of the battery module and the mode switching end when receiving a high level or low level signal from the main control unit, otherwise disconnects the positive pole of the battery module and the mode switching end; the manual starting circuit is used to manually connect or disconnect the connection between the positive pole of the battery module and the mode switching end; the charging device access starting circuit connects the positive pole of the battery module and the mode switching end when the charging device is connected, and disconnects the positive pole of the battery module and the mode switching end when the charging device is removed.

[0057] [Charge and discharge management mechanism with charge protection]

[0058] Figures 2 to 4 Schematic diagrams of the states of the battery management unit in some preferred embodiments are shown respectively, wherein: Figure 2 The battery management unit is shown in sleep mode. Figure 3 The battery management unit is shown in a discharged state. Figure 4 The battery management unit shown is in the charging and discharging state, such as Figures 2 to 4 As shown, the battery management unit includes a battery management chip, a charging control circuit and a discharging control circuit.

[0059] Among them, the battery management chip includes a power input terminal (VBAT), a mode switching terminal (SHIP), a charging control terminal (CHG) and a discharging control terminal (DSG), the power input terminal is connected to the positive electrode of the battery, the mode switching terminal is used to receive a start signal sent by at least one start module, the charging control terminal is used to output a charging control signal, and the discharging control terminal is used to output a discharging control signal; the charging control circuit controls the connection and disconnection of the charging negative electrode and the negative electrode of the battery module based on the charging control signal and the access status of the charging device; the discharging control circuit controls the connection and disconnection of the discharging negative electrode and the negative electrode of the battery module based on the discharging control signal.

[0060] In some preferred embodiments, the start signal is a high-level signal having the same voltage as the positive electrode of the battery module, that is, when the mode switching terminal and the power input terminal are in an open circuit state, the battery management chip is in a dormant state, and its charging control terminal and discharge control terminal are in a floating state. At this time, the connection between the negative electrode of the battery module and the charging negative electrode C- and the discharging negative electrode P- are disconnected (such as Figure 2 As shown in the figure, the charging and discharging ports are not powered, thus ensuring safety in the dormant state.

[0061] When the mode switch terminal and the power input terminal are in a short-circuit state, the battery management chip is activated and takes over the control of charging and discharging. If no charging device is connected or the charging device is removed after the battery management chip is activated (such as Figure 3 As shown), at this time, only the discharge negative electrode P- is connected to the negative electrode of the battery module, and the battery module supplies power to the electrical equipment. The charging port is not energized to avoid problems such as electric shock when the charging port is idle, thereby achieving the safety protection of the charging port "only charging but not discharging".

[0062] If the battery management chip is activated and the charging device is connected, or a charging device is connected during the battery module's power supply to the power-consuming device (such as Figure 4 As shown), at this time, the charging negative electrode C-, the discharging negative electrode P- and the negative electrode of the battery module are all connected, so that charging and discharging can be carried out simultaneously.

[0063] [Transition between different states of the battery management unit]

[0064] Figure 5 The figure shows the process of the battery management unit switching between different states when the battery charge and discharge integrated management system provided by the present application performs battery charge and discharge management. Figure 5 As shown:

[0065] 1) When the battery control chip is in a dormant state, the charging negative electrode C- and the negative electrode of the battery module, and the discharging negative electrode P- and the negative electrode of the battery module are both disconnected by the battery control chip. At this time, the battery module can neither be discharged nor charged;

[0066] 2) When the battery control chip is in sleep mode and a charging device is connected to the charging port, the battery control chip is started. At this time, since the charging device is in the connected state, the battery control chip controls the charging negative electrode C- to be connected to the negative electrode of the battery module, and the charging device can charge the battery module normally. At the same time, the discharge negative electrode P- is also connected to the negative electrode of the battery module, and the battery module can discharge the power device normally. At this time, the battery module can be charged or discharged;

[0067] 3) When the battery control chip receives a high-level or low-level trigger signal from the main control unit in the dormant state, or is triggered by a manual button, the battery control chip is started. At this time, since there is no charging device connected, only the discharge negative electrode P- and the negative electrode of the battery module are connected, so that the battery module can normally supply power to the power-consuming equipment, and the charging negative electrode C- remains disconnected from the negative electrode of the battery module, thereby ensuring that the charging port is not charged and avoiding the idle charging port from being accidentally electrocuted. At this time, the battery module can only discharge but not charge;

[0068] 4) When the charging device of the battery control chip is removed in the startup state, the battery management unit disconnects the charging negative electrode C- from the negative electrode of the battery module according to the change of the charging device, but still maintains the connection between the discharging negative electrode P- and the negative electrode of the battery module, so that the battery module enters a state where it can only be discharged but not charged;

[0069] 5) When the battery control chip is connected to the charging device in the startup state, the battery management unit connects the charging negative electrode C- with the negative electrode of the battery module according to the change of the charging device, while still maintaining the connection between the discharge negative electrode P- and the negative electrode of the battery module, so that the battery module enters a state where it can be both discharged and charged;

[0070] 6) When any of the start-up modules is not triggered, the battery control chip re-enters the sleep state and disconnects the charging negative electrode C-, the discharging negative electrode P- from the negative electrode of the battery module again. [Specific embodiment]

[0072] Figures 6 to 9 The schematic diagrams of the circuits of the charging device connected to the starting circuit, the main control unit starting circuit, the charging control circuit and the discharging control circuit in a specific embodiment are respectively shown.

[0073] like Figure 6As shown, the charging device access startup circuit includes a first optocoupler J1, a first resistor R16, and a low-level enabled switch tube Q1, wherein the first input end of the first optocoupler J1 is connected to the charging and discharging positive electrode through the first resistor R16, the second end is connected to the charging negative electrode, the first output end is grounded, and the second output end is connected to the enable end of the switch tube Q1. The two ends of the switch tube Q1 are respectively connected to the power input end VBAT and the mode switching end SHIP of the battery management chip. When the charging device is connected, the light-emitting diode of the first optocoupler J1 emits light and triggers its second output end to be grounded, thereby sending a low-level signal to the enable end of the switch tube Q1. After the switch tube Q1 is turned on, the power input end of the battery management chip is connected to the mode switching end, thereby starting from the sleep state.

[0074] like Figure 7 As shown, the main control unit startup circuit includes a second optical coupler J3, a second resistor R19 and a low-level enabled switch tube Q1 (that is, the main control unit startup circuit can share the same switch tube with the charging device connected to the startup circuit), wherein the first input end of the second optical coupler J3 is used to access the positive electrode of the battery, the second end is connected to the first end of the second resistor R19 as the charging negative electrode P-, the first output end is grounded, the second output end is connected to the enable end of the switch tube Q1, and the two ends of the switch tube Q1 are respectively connected to the power input end VBAT and the mode switch of the battery management chip The first end of the second optical coupler J3 and the second end of the second resistor R19 are controlled to be on and off by a high level or low level signal sent by the main control unit. For example, a MOS tube that is turned on at a low level is used. When the main control unit sends a low level, it is turned on (and vice versa). At this time, the light-emitting diode of the second optical coupler J3 emits light and triggers its second output terminal to be grounded, thereby sending a low level signal to the enable terminal of the switch tube Q1. After the switch tube Q1 is turned on, the power input terminal of the battery management chip is connected to the mode switching terminal, thereby starting from a sleep state.

[0075] The manual start circuit can be constructed using various types of mechanical push button switches known to those skilled in the art, such as a pop-up button whose two contacts are respectively connected to the power input terminal VBAT and the mode switching terminal SHIP of the battery management chip. When the button is pressed, the VBAT terminal and the SHIP terminal are connected, and when the button is lifted, the connection between the two is disconnected.

[0076] like Figure 8As shown, the charging control circuit includes a first switch tube Q9, a first relay JK1 and a charging protection circuit, wherein the enable end (G pole) of the first switch tube Q9 is used to input the charging control signal of the charging control end CHG, its S pole is connected to one end of the switch of the first relay JK1, and its D pole is connected to one end of the coil of the first relay JK1. The other end of the switch of the first relay is connected to the negative electrode of the battery module, and the other end of the coil of the first relay JK1 is connected to the charging and discharging positive electrode B+. Among them, the first switch tube Q9 is used to control the connection and disconnection of the charging negative electrode and one end of the coil of the first relay JK, and the first relay JK1 controls the connection and disconnection of the charging negative electrode C- and the negative electrode of the battery module according to whether there is a potential difference between the two ends of its coil.

[0077] Specifically, the battery protection chip U1 starts after being triggered, and outputs a high-level charging control signal through the CHG terminal. At this time, the first switch tube Q9 is turned on, and the two ends of the coil of the first relay JK1 are respectively at the same potential as the charging and discharging positive electrode B+ and the charging negative electrode C-. At this time, if no charging device is connected, the charging negative electrode C- is in a floating state, and the switch of the first relay JK1 is not attracted. Therefore, the negative electrode of the battery module is not connected to the charging negative electrode C-, and the charging negative electrode C- is not charged. When a charging device is connected, a potential difference is formed at the two ends of the coil of the first relay JK1, thereby attracting its switch and connecting the negative electrode of the battery module to the charging negative electrode C-, and entering normal charging.

[0078] The charging protection circuit is enabled by the access status of the charging device, and is used to control the on-off of the charging control terminal CHG and the enable terminal of the first switch tube Q9. Specifically, the charging protection circuit includes a charging self-protection optocoupler and a current limiting resistor R23, wherein the first input terminal of the charging self-protection optocoupler J2 is connected to the positive electrode of the charging device through the current limiting resistor R23, the second input terminal is connected to the negative electrode of the charging device, the first output terminal is connected to the charging control terminal CHG, and the second output terminal is connected to the enable terminal of the first switch tube Q9.

[0079] The purpose of setting up the charging protection circuit is that if the enable end of the first switch tube Q9 always receives a high-level charging control signal, when the switch of the first relay JK1 is attracted by its coil, even when the charging is completed and the charging device is removed, the two ends of the coil of JK1 still maintain the connection between the positive electrode B+ of the battery and the negative electrode (ground terminal) of the battery module, causing its switch to be continuously attracted and unable to be disconnected, so that after the charging device is connected once, the charging port cannot be automatically powered off by removal. To this end, through the charging protection circuit, the charging control signal can be output to the first switch tube Q9 only when the charging device is connected. When no charging device is connected, the connection between the charging negative electrode C- and the coil of JK1 is disconnected, so that it cannot attract the switch, thereby automatically disconnecting the connection between the negative electrode of the battery module and the charging negative electrode.

[0080] In some preferred embodiments, Figure 8 As shown, a potential detection circuit is also connected between the second output terminal of the charging self-protection optocoupler and the enable terminal of the first switch tube Q9. The potential detection circuit includes a transistor Q2, which controls the connection and disconnection of the second output terminal of the charging self-protection optocoupler and the enable terminal of the first switch tube Q9 according to whether the potential of the second output terminal of the charging self-protection optocoupler is higher than a preset potential threshold, so as to avoid the noise current of the CHG port causing the first switch tube Q9 to be mistakenly turned on.

[0081] like Fig. 9 As shown, the discharge control circuit is enabled by the discharge control signal output by the discharge control terminal DSG, and is used to control the on-off of the discharge negative electrode P- and the negative electrode of the battery module. It includes a second switch tube Q11 and a second relay JK2. The enable end (G pole) of the second switch tube Q11 is connected to the discharge control terminal DSG, its S pole is connected to the negative electrode of the battery module, and its D pole is connected to one end of the coil of the second relay JK2. The other end of the coil of the second relay JK2 is connected to the charge and discharge positive electrode B+, and the two ends of the switch of the second relay JK2 are respectively connected to the negative electrode of the battery module and the discharge negative electrode P-. When the discharge control terminal DSG outputs a high-level discharge control signal, the second switch tube Q11 is turned on. At this time, the two ends of the coil of the second switch tube Q11 are respectively connected to the charge and discharge positive electrode B+ and the negative electrode of the battery module to form a potential difference, thereby attracting its switch to turn on the switch, so that the negative electrode of the battery module is connected to the discharge negative electrode P-, and normal discharge is achieved; when the discharge control terminal DSG outputs a low-level discharge control signal, or is floating, Q11 is disconnected, at this time the discharge negative electrode P- is disconnected from the negative electrode of the battery module, and the battery is prohibited from discharging through the discharge negative electrode P-.

[0082] The second aspect of the present application provides a battery charging and discharging integrated management method, which manages the charging and discharging process of the battery module through the aforementioned battery charging and discharging integrated management system, such as Fig.10 As shown, the management method includes the following operations:

[0083] Operation 1: when the battery management unit is in a dormant state, disconnect the negative electrode of the battery module from the charging negative electrode, and disconnect the negative electrode of the battery module from the discharging negative electrode;

[0084] Operation 2, starting the battery management unit based on at least one of the following actions: manual start, connecting to a charging device, receiving a high level or low level signal from the main control unit;

[0085] Operation three, when the battery management unit is in the startup state, the battery management unit controls the connection and disconnection of the charging negative electrode and the negative electrode of the battery module, as well as the connection and disconnection of the discharging negative electrode and the negative electrode of the battery module, wherein when the charging device is not connected, the charging negative electrode and the negative electrode of the battery module are disconnected.

[0086] The specific implementation methods of the above operations have been described in detail in the description of the battery charging and discharging integrated management system, and will not be repeated here.

[0087] The above is a detailed introduction to the specific implementation methods of the present application. For those skilled in the art, several improvements and modifications may be made to the present application without departing from the principles of the present application. These improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A comprehensive battery charging and discharging management system, It is characterized in that It includes a main control unit, a battery management unit, a battery module and at least one starting module; The battery management unit controls the battery module to supply power to the power-consuming device through the discharge port based on the half-split mode, and to charge the battery module through the charging device connected to the charging port; The at least one starting module starts the battery management unit by at least one of the following actions: receiving a high level or low level signal from the main control unit, manually starting, or connecting to a charging device; There is no communication connection between the main control unit and the battery management unit; The half-split mode is specifically: The charging port and the discharging port have a charging and discharging positive electrode at the same port, and a charging negative electrode and a discharging negative electrode at separate ports; The charging and discharging positive electrode is connected to the positive electrode of the battery module, and the charging negative electrode and the discharging negative electrode are switched on and off with the negative electrode of the battery module under the control of the battery management unit; The battery management unit includes a battery management chip, a charging control circuit and a discharging control circuit; The battery management chip includes a power input terminal, a mode switching terminal, a charging control terminal and a discharging control terminal, wherein the power input terminal is connected to the positive electrode of the battery, the mode switching terminal is used to receive a start signal sent by the at least one start module, the charging control terminal is used to output a charging control signal, and the discharging control terminal is used to output a discharging control signal; The charging control circuit controls the connection and disconnection between the charging negative electrode and the negative electrode of the battery module based on the charging control signal and the access status of the charging device; The discharge control circuit controls the connection and disconnection between the discharge negative electrode and the negative electrode of the battery module based on the discharge control signal; The charging control circuit includes a first switch tube and a first relay; The G pole of the first switch tube is used to input the charging control signal of the charging control end, the S pole is connected to one end of the switch of the first relay, the D pole is connected to one end of the coil of the first relay, the other end of the switch of the first relay is connected to the negative electrode of the battery module, and the other end of the coil of the first relay is connected to the positive electrode of charging and discharging; The charging control circuit also includes a charging protection circuit; The charging protection circuit includes a charging self-protection optocoupler and a current limiting resistor, wherein the first input end of the charging self-protection optocoupler is connected to the positive electrode of the charging device through the current limiting resistor, the second input end is connected to the negative electrode of the charging device, the first output end is connected to the charging control end, and the second output end is connected to the enable end of the first switch tube.

2. The battery charging and discharging integrated management system according to claim 1, Features: The start signal is a high level signal having the same voltage as the positive electrode of the battery module.

3. The battery charging and discharging integrated management system according to claim 2, It is characterized in that The startup module includes at least one of the following circuits: The main control unit start circuit, manual start circuit, and charging equipment are connected to the start circuit; The main control unit startup circuit connects the positive electrode of the battery module and the mode switching end when receiving a high level or low level signal from the main control unit, otherwise disconnects the positive electrode of the battery module and the mode switching end; The manual start circuit is used to manually connect or disconnect the positive electrode of the battery module and the mode switching end; The charging device access start circuit connects the positive electrode of the battery module and the mode switching end when the charging device is connected, and disconnects the positive electrode of the battery module and the mode switching end when the charging device is removed.

4. The battery charging and discharging integrated management system according to claim 1, Features: The discharge control circuit includes a second switch tube and a second relay; The G pole of the second switch tube is connected to the discharge control end, the S pole is connected to the negative pole of the battery, the D pole is connected to one end of the coil of the second relay, the other end of the coil of the second relay is connected to the charging and discharging positive pole, and the two ends of the switch of the second relay are respectively connected to the negative pole of the battery and the negative pole of the discharge.

5. The battery charging and discharging integrated management system according to claim 1, Features: The main control unit is powered by the battery module.

6. A battery charging and discharging integrated management method, which manages the charging and discharging process of the battery module through the battery charging and discharging integrated management system according to claim 1, It is characterized in that The following operations are included: Operation 1: when the battery management unit is in a dormant state, disconnect the negative electrode of the battery module from the charging negative electrode, and disconnect the negative electrode of the battery module from the discharging negative electrode; Operation 2, starting the battery management unit based on at least one of the following actions: receiving a high level or low level signal from the main control unit, manually starting, or connecting to a charging device; Operation three, when the battery management unit is in the startup state, the battery management unit controls the connection and disconnection of the charging negative electrode and the negative electrode of the battery module, as well as the connection and disconnection of the discharging negative electrode and the negative electrode of the battery module, wherein when the charging device is not connected, the charging negative electrode and the negative electrode of the battery module are disconnected.

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