CC1 direct current charging wake-up circuit and method, battery management system and vehicle
By designing a CC1 DC charging wake-up circuit, the problem that the existing CC1 signal wake-up scheme cannot meet the requirements of the new national standard is solved, realizing reliable wake-up and wake-up retention of BMS, improving the stability of the battery management system and reducing hardware costs.
Patent Information
- Application Number
- CN202511141035.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-15
- Publication Date
- 2025-10-17
AI Technical Summary
The existing CC1 signal wake-up solution cannot meet the requirements of the new national standard GB/T18487.5-2024. It is difficult to accurately identify the voltage status of the CC1 signal, resulting in unreliable BMS gun plug wake-up and wake-up hold functions.
A CC1 DC charging wake-up circuit was designed, including an input control module, a wake-up module, an MCU chip, a 5V power supply module, a 12V power supply module, and a switch S2 module. The circuit generates a wake-up control signal by identifying different voltage states of the CC1 signal, ensuring reliable wake-up and wake-up retention of the BMS.
It achieves accurate identification and processing of different voltage states of CC1 signals, meets the requirements of the new national standard, ensures the coordinated operation of BMS and charging system, improves the stability and reliability of the battery management system, and reduces hardware costs.
Smart Images
Figure CN120792598A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the technical field of electric vehicle charging detection, and particularly relates to a CC1 direct current charging wake-up circuit, method, battery management system and vehicle. BACKGROUND
[0002] With the rapid development of the electric vehicle industry, the standardization of charging systems is increasingly important. The newly released charging national standard GB / T18487.5-2024 “Electric Vehicle Conductive Charging System Part 5: DC Charging System for GB / T20234.3” in 2024 proposes new requirements for the DC charging control guide circuit. It adds switches S1 (non-vehicle-mounted charger end) and S2 (vehicle interior), clearly defines the control timing of switch on-off and the voltage state of detection point 3 (i.e. CC1 signal), and stipulates that the CC1 signal must have the functions of waking up the battery management system (BMS) and keeping the BMS awake.
[0003] However, the existing CC1 signal wake-up scheme cannot meet the technical requirements of the new national standard. Under different on-off combinations of switches S1 and S2, it is difficult to accurately identify the voltage state of the CC1 signal, resulting in the inability to reliably achieve the functions of waking up and keeping the BMS awake. Therefore, it is urgent to design a CC1 direct current charging wake-up circuit and related scheme that meets the requirements of the new national standard to address the shortcomings of existing technology. SUMMARY
[0004] The purpose of the present application is to provide a CC1 direct current charging wake-up circuit, method, battery management system and vehicle.
[0005] To achieve the above-mentioned purpose, the present application provides the following technical solution: a CC1 direct current charging wake-up circuit, comprising: an input control module, a wake-up module, an MCU chip, a 5V power supply module, a 12V power supply module, a switch S2 module, and a charging gun CC1 interface module; The input end of the 12V power supply module is connected to the vehicle-mounted power supply, and the output end is connected to the power input ends of the switch S2 module, the input control module, the 5V power supply module, and the wake-up module; The input end of the switch S2 module is connected to the charging gun CC1 interface module through the internal switch S of the vehicle charging plug, and the output end T3 is connected to the input end IN1 of the input control module; The input end CN2 of the input control module is connected to the control output end of the MCU chip, and the output ends T10 and T25 are respectively connected to the input ends WKN and WA of the wake-up module; The output end Wake of the wake-up module is connected to the enable end EN of the 5V power supply module; The 5V power supply module output end is connected with the power input end P2 of the MCU chip and the wake-up module; The input control module is configured to: According to the CC1 signal state 0V / 2V / 4V / 8V / 10V of the output end T3 and the control signal CN2 of the MCU chip, the wake-up control signals T10 and T25 are generated. The wake-up module is configured to: When T10 is high, a high-level wake-up signal is output to the enable end EN to trigger the plug-in gun wake-up. When T25 is high, a high-level wake-up signal is output to the enable end EN to maintain the BMS wake-up state.
[0006] Preferably, the input control module includes resistors R1-R16, switch tubes M1, M3, M8, M9, M10, M12, M25, and M29. The input end IN1 is connected with the source electrode of the switch tube M8 through the resistor R9, and the drain electrode of the switch tube M8 is connected with the output end T10. The input end CN2 is connected with the gate electrode of the switch tube M9 through the resistor R1, and the drain electrode of the switch tube M9 is connected with the gate electrode of the switch tube M29 through the resistor R7. The output end T25 is connected with the drain electrode of the switch tube M1 and the drain electrode of the switch tube M10 through the resistor R14.
[0007] Preferably, the wake-up module includes: Resistors R20-R36, switch tubes Q1, Q2, M2, M15, M16, M21, M30, and M31. The input end WKN is connected with the base electrode of the switch tube Q1 through the voltage stabilizing tube D1, and the collector electrode of the switch tube Q1 is connected with the gate electrode of the switch tube M15. The input end WA is connected with the gate electrode of the switch tube M16, and the drain electrode of the switch tube M16 is connected with the gate electrode of the switch tube M31 through the resistor R30. The output end Wake is connected with the cathode of the diode D2 / D3 and the capacitor C1.
[0008] Preferably, the switch S2 in the switch S2 module is a normally closed relay, which is closed when any of the following conditions is met: The BMS is in sleep mode, and the vehicle-mounted 12V / 24V power supply is connected; No vehicle-mounted power supply is connected.
[0009] Preferably, the wake-up logic of the wake-up module satisfies: When the input end WKN is high and the WA is low, the trigger gun wake-up is triggered; When the input end WKN is low and the WA is high, the BMS wake-up state is maintained.
[0010] The application further discloses a CC1 direct-current charging wake-up method applied to the circuit, and the method comprises the following steps of: detecting a CC1 signal state of a charging gun CC1 interface module; generating a wake-up control signal T10 and T25 based on the CC1 signal state and a control signal CN2 of an MCU chip; When the T10 is high, the wake-up module outputs a high-level wake-up signal to the 5V power module to trigger the BMS gun wake-up. When the T25 is high, the wake-up module outputs a high-level wake-up signal to the 5V power module to maintain the BMS wake-up state.
[0011] Preferably, the mapping of the CC1 signal state and the wake-up logic comprises the following steps of: When the CC1 is 4V and the CN2 is low, the output T10 is high, and the gun wake-up is triggered. When the CC1 is 10V and the CN2 is high, the output T25 is high, and the wake-up state is maintained.
[0012] Preferably, in the BMS wake-up state, the wake-up module comprises the following steps of: When the CC1 is 2V and the CN2 is low, the wake-up module maintains the wake-up signal through the capacitor C1. When the CC1 is 8V or 10V and the CN2 is high, the wake-up module maintains the wake-up signal through the switch tube M31.
[0013] The application further discloses a battery management system comprising the CC1 direct-current charging wake-up circuit. The MCU chip is configured to: output the control signal CN2 in the wake-up state to control the on-off of the switch S2 module. The level state of the CN2 is dynamically adjusted according to the charging protocol.
[0014] The application further discloses a vehicle comprising the battery management system.
[0015] The CC1 direct-current charging wake-up circuit and method provided by the application can accurately meet the requirements of the new national standard GB / T18487.5-2024, and can reliably realize the gun wake-up and wake-up maintenance functions of the BMS through the identification and processing of different voltage states (10v, 8v, 4v, 2v, 0v) of the CC1 signal, so as to ensure that the cooperative work of the BMS and the charging system in the charging process meets the standard specification.
[0016] The circuit is simple in overall structure, all the components used are general types, no special chip is needed, domestic components can be used to realize, and the hardware cost is effectively reduced; meanwhile, the abnormality of the wake-up function caused by software or hardware failure is avoided through hardware logic design, and the stability and reliability of the battery management system in the charging process are improved. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 is a schematic diagram of the CC1 signal wake-up circuit of the present application; Figure 2 is a schematic diagram of the input control module of the CC1 signal wake-up circuit provided by the present application; Figure 3 is a schematic diagram of the wake-up module of the CC1 signal wake-up circuit provided by the present application; In the figure: 100, input control module; 200, wake-up module; 300, MCU chip; 400, 5v power module; 500, 12v power module; 600, switch S2 module; 700, charging gun CC1 interface module. DETAILED DESCRIPTION
[0018] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.
[0019] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the present application. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.
[0020] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing", "fixed" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0021] The specific embodiments of the present application will be described in detail below in conjunction with the drawings and preferred embodiments.
[0022] As shown in Figure 1 , referring to Figure 1 , the CC1 direct current charging wake-up circuit of the present application comprises an input control module 100, a wake-up module 200, an MCU chip 300, a 5v power module 400, a 12v power module 500, a switch S2 module 600 and a charging gun CC1 interface module 700, wherein: The power input end of the 12v power module 600 is connected to the vehicle-mounted power supply 12v / 24v, and the 12v power output end is respectively connected to the switch S2 module, the input control module 100, the power input end of the 5v power module 400, and also connected to the power input end P1 of the wake-up module 200, thereby providing 12v direct current power for the four modules.
[0023] It should be noted that the 12v power module 600 and the 5v power module both use existing circuits, which are not within the protection scope of the present application, so the circuit structure and working principle thereof will not be described in detail here.
[0024] The power input end of the switch S2 module 600 is connected to the output end of the 12v power module 500 to receive 12v direct current power.
[0025] The input end CC1 of the switch S2 module 600 is connected to the charging gun CC1 interface module 700 through a switch S, wherein the switch S2 in the switch S2 module 600 is a normally closed switch, the switch S1 is a normally closed switch inside the direct current charger, and the switch S is a normally closed switch inside the vehicle charging plug, and when the charging gun is completely connected to the vehicle charging socket, the switch S is closed.
[0026] It should be noted that the switch S2 in the switch S2 module 600 uses a normally closed relay, and when the vehicle-mounted 12v / 24v is connected and the BMS is in sleep mode, or when there is no vehicle-mounted 12v / 24v connection, the switch S2 is closed.
[0027] It should be noted that the switch S2 module 600 is not within the protection scope of the present application, so it will not be described in detail here.
[0028] The output end T3 of the switch S2 module 600 is connected to the input end IN1 of the input control module 100, and the output end T3 has five CC1 signal states, as shown in Table 1. The CC1 signal states in Table 1 are determined by the on-off states of the switches S1 and S2 when the charging gun is inserted and the switch S is closed, and include four signal states: 2v, 4v, 8v and 10v. When there is no charging gun inserted or the switch S is open, there is only one signal state: 0v.
[0029] The power input end of the input control module 100 is connected to the power output end of the 12v power module 500 to receive 12v DC power. The input end IN1 of the input control module 100 is connected to the output end T3 of the switch S2 module, and the signal state of the output end T3 changes with the on-off state of the switches S1, S2 and S. The input end CN2 of the input control module 100 is connected to the control output end of the MCU chip 400 to receive the control signal CN2 output by the MCU chip 400, which controls the signal state of the output ends T10 and T25 of the input control module 100. The output end T10 of the input control module 100 is connected to the input end WKN of the wake-up module 200 to output a wake-up signal WKN to the wake-up module 200. The output end T25 is connected to the input end WA of the wake-up module 200 to output a wake-up signal WA to the wake-up module 200. The signal states of the output ends T10 and T25 are consistent with the signal states of the wake-up signals WKN and WA, and together control the signal state of the output end Wake of the wake-up module 200.
[0030] In specific implementation, see Figure 2The input control module 100 includes resistors R1-R16, switch tubes M1, M3, M8, M9, M10, M12, M25, and M29. The first terminal of resistor R1 is connected to the input end CN2 of the input control module 100 to receive the control signal CN2 sent by the MCU chip 300. The first terminal of resistor R1 is also connected to the first terminal of resistor R10. The second terminal of resistor R1 is connected to the first terminal of resistor R2 and the gate G of switch tube M9. The first terminal of resistor R2 and the source S of switch tube M9 are connected to the ground. The drain D of switch tube M9 is connected to the second terminal of resistor R7 and the gate of switch tube M29. The first terminal of resistor R7 is connected to the second terminal of resistor R5 and the source S of switch tube M29. The first terminal of resistor R5 is connected to the 12-volt power input end of the input control module 100 to receive the 12-volt direct current power from the power output end of the 12-volt power module 500. The first terminal of resistor R5 is also connected to the first terminal of resistor R3. The second terminal of resistor R3 is connected to the first terminal of resistor R4, the gate G of switch tube M12, and the drain D of switch tube M25. The second terminal of resistor R4 is connected to the ground. The gate G of switch tube M25 is connected to the drain D of switch tube M29 and the first terminal of resistor R6. The second terminal of resistor R6, the source S of switch tube M12, and the source S of switch tube M25 are connected to the ground. The drain D of switch tube M12 is connected to the second terminal of resistor R8. The first terminal of resistor R8 is connected to the second terminal of resistor R9 and the gate G of switch tube M8. The first terminal of resistor R9 is connected to the output end T3 of the switch S2 module as the input end IN1 of the input control module 100. When the signal state of the output end T3 changes, the signal states of the output ends T10 and T25 of the input control module 100 change accordingly. The first terminal of resistor R9 is also connected to the source S of switch tube M8, the first terminal of resistor R13, and the source S of switch tube M1. The drain D of switch tube M8 is connected to the output end T10 of the input control module 100 to output the wake-up control signal T10 to the wake-up module 200. The second terminal of resistor R10 is connected to the first terminal of resistor R11 and the gate G of switch tube M3. The second terminal of resistor R11 and the source S of switch tube M3 are connected to the ground. The drain D of switch tube M3 is connected to the first terminal of resistor R12. The second terminal of resistor R12 is connected to the second terminal of resistor R13 and the gate G of switch tube M1. The drain D of switch tube M1 is connected to the first terminal of resistor R14 and the first terminal of capacitor C3. The second terminal of capacitor C3 is connected to the ground. The second terminal of resistor R14 is connected to the output end T25 of the input control module 100 to output the wake-up control signal T25 to the wake-up module 200. The second terminal of resistor R14 is also connected to the drain D of switch tube M10. The gate G of switch tube M10 is connected to the first terminal of resistor R15 and the first terminal of resistor R16. The second terminal of resistor R16 and the source S of switch tube M10 are connected to the ground.The second pin of the resistor R15 is connected to the output terminal T13 of the wake-up module 200 as the input terminal IN12 of the input control module 100, and receives the control signal T13 output by the wake-up module 200.
[0031] The working principle of the input control module 100 is as follows: When the BMS is in sleep state, the output terminal of the MCU chip 300 is at low level, and the input terminal CN2 of the input control module 100 is pulled to low level 0v by the resistors R1, R2, R10 and R11, so that the switch tubes M9, M29 and M25 are cut off. Since the 12v power input terminal is a constant 12v input, the switch tube M12 is turned on and the switch tube M8 is cut off, and the output terminal T10 is at low level 0v. The input terminal CN2 of the input control module 100 is also pulled to low level 0v by the resistors R10 and R11, so that the switch tubes M3 and M1 are cut off, and the output terminal T25 is pulled to low level 0v by the resistor R29 in the wake-up module 200. In this case, the wake-up module 200 does not output the control signal T13, and the output terminal T13 is pulled to low level 0v by the resistors R15 and R16 in the input control module 100, so that the switch tube M10 is cut off.
[0032] After the BMS is woken up, the output terminal of the MCU chip 300 remains at low level, so that the input terminal CN2 of the input control module 100 remains at low level 0v. When no charging gun is inserted, the output terminal T10 and the output terminal T25 are both at low level 0v. When a charging gun is inserted, according to the CC1 signal state in Table 1, if the input terminal IN1 (T3) of the input control module 100 is at 2v or 4v, the switch tube M12 is cut off and the switch tube M8 is turned on, so that the output terminal T10 is at 2v or 4v, and the switch tubes M1, M3 and M10 are cut off, so that the output terminal T25 is at low level. If the input terminal IN1 (T3) of the input control module 100 is at 8v or 10v, the switch tubes M12 and M8 are both turned on, so that the output terminal T10 is at low level, the switch tubes M1 and M3 are turned on and the switch tube M10 is cut off, so that the output terminal T25 is at 4v or 5v.
[0033] It should be noted that the CC1 signal state in Table 1 is determined by the on-off state of the switch S and the switches S1 and S2 when a charging gun is inserted, and includes four signal states 2v, 4v, 8v and 10v. When no charging gun is inserted, there is only one signal state: 0v.
[0034] The power supply end P1 of the wake-up module 200 is connected to the power supply output end of the 12v power supply module 500 to receive 12v DC power supply; the power supply end P2 of the wake-up module 200 is connected to the power supply output end of the 5v power supply module 500 to receive 5v DC power supply; the input end WKN of the wake-up module 200 is connected to the output end T10 of the input control module 100 to receive the wake-up signal WKN; if the wake-up signal WKN is high level, the wake-up output end Wake of the wake-up module 200 is high level, which can realize plug-in wake-up of the BMS; if the wake-up signal WKN is low level, the wake-up output end Wake is low level, which cannot wake up the BMS; the input end WA of the wake-up module 200 is connected to the output end T25 of the input control module 100 to receive the wake-up signal WA; if the wake-up signal WA is high level, the wake-up output end Wake of the wake-up module 200 is high level, which can realize BMS wake-up keeping; if the wake-up signal WA is low level, the wake-up output end Wake is low level, which cannot realize BMS wake-up keeping; the output end Wake of the wake-up module 200 is connected to the enable input end EN of the 5v power supply module 400 to output the wake-up enable signal EN to the 5v power supply module 400; if the wake-up enable signal EN is high level, the BMS can be woken up; if the wake-up enable signal EN is low level, the BMS cannot be woken up.
[0035] In a specific implementation, refer to Figure 3The wake-up module 200 includes resistors R20-R36, switching tubes Q1-Q2, switching tubes M2, M15, M16, M21, M30, M31, wherein: the first pin of the resistor R20 is connected to the output terminal T10 of the input control module 100 as the input terminal WKN of the wake-up module 200, and receives the wake-up control signal T10 output by the input control module 100; the first pin of the resistor R20 is also connected to the first pin of the resistor R31 and the first pin of the capacitor C2; the second pin of the resistor R20 is connected to the cathode of the voltage stabilizing tube D1; the anode of the voltage stabilizing tube D1 is connected to the first pin of the resistor R21 and the base b of the switching tube Q1; the second pin of the resistor R21 and the emitter e of the switching tube Q1 are connected to the ground terminal; the collector C of the switching tube Q1 is connected to the second pin of the resistor R22 and the gate G of the switching tube M15; the first pin of the resistor R22 is connected to the power output terminal of the 12V power module 500 as the power input terminal P2 of the wake-up module, and receives the 12V direct current power supply; the first pin of the resistor R22 is also connected to the source S of the switching tube M15, the first pin of the resistor R26, and the source S of the switching tube M31; the second pin of the resistor R26 is connected to the gate G of the switching tube M31, the first pin of the resistor R27, and the first pin of the resistor R30; the drain D of the switching tube M31 is connected to the first pin of the resistor R28; the second pin of the resistor R28 is connected to the anode of the diode D3; the cathode of the diode D3 is connected to the wake-up output terminal Wake of the wake-up module 200, and provides the wake-up enable signal EN for the enable terminal EN of the 5V power module 400; the second pin of the resistor R30 is connected to the drain D of the switching tube M16; the gate of the switching tube M16 is connected to the output terminal T25 of the input control module 100 as the input terminal WA of the wake-up module 200, and receives the wake-up control signal T25; the gate G of the switching tube M16 is also connected to the first pin of the resistor R29; the source S of the switching tube M16 and the second pin of the resistor R29 are connected to the ground terminal; the second pin of the resistor R27 is connected to the drain D of the switching tube M30, the source S of the switching tube M30 is connected to the ground terminal, and the gate G of the switching tube M30 is connected to the first pin of the resistor R25 and the drain D of the switching tube M2; the second pin of the resistor R25 is connected to the ground terminal; the source of the switching tube M2 is connected to the first pin of the resistor R34 and the second pin of the resistor R35; the first pin of the resistor R35 is connected to the power output terminal of the 5V power module 400 as the power input terminal P2 of the wake-up module 200, and receives the 5V direct current power supply; the second pin of the resistor R34 is connected to the collector C of the switching tube Q2; the emitter e of the switching tube Q2 is connected to the ground terminal, and the base b of the switching tube Q2 is connected to the second pin of the resistor R32 and the drain D of the switching tube M21; the first pin of the resistor R32 is connected to the first pin of the resistor R33 and the second pin of the resistor R31; the second pin of the resistor R33 is connected to the ground terminal.The drain D of the switch tube M15 is connected to the output terminal T13 of the wake-up module 200, and outputs a control signal T13 to the input control module 100; the drain D of the switch tube M15 is also connected to the first pin of the resistor R23 and the first pin of the resistor R36; the second pin of the resistor R23 is connected to the anode of the diode D2, and the cathode of the diode D2 is connected to the output terminal Wake of the wake-up module 200, and outputs the wake-up enable signal EN to the 5v power module; the cathode of the diode D2 is also connected to the first pin of the resistor R24 and the first pin of the capacitor C1 respectively; the second pin of the resistor R24 and the second pin of the capacitor C1 are connected to the ground terminal respectively; the second pin of the resistor R36 is connected to the first pin of the resistor R37 and the gate G of the switch tube M21 respectively; the second pin of the resistor R37 and the source S of the switch tube M21 are connected to the ground terminal respectively.
[0036] The working principle of the wake-up module 200 is as follows: When no charging gun is inserted, the output terminal T10 and the output terminal T25 of the input control module 100 are both 0v, and then the wake-up input terminal WKN and the input terminal WA of the wake-up module 200 are also both 0v; the wake-up input terminal WKN is 0v, so that the voltage stabilizing tube D1 is not broken down, the switch tubes Q1, M15 and M21 are cut off, and the resistors R32 and R33 make the switch tubes Q2 and M2 cut off; since the input terminal WA is 0v, the switch tube M16 is cut off, so that the switch tube M31 is cut off, and the wake-up output terminal Wake of the wake-up module 200 is pulled down to a low level 0v by the resistor R24, so that the enable input terminal EN of the 5v power module 400 is a low level 0v, and the 5v power module 400 is controlled not to output a 5v direct current power supply, which does not supply power to the MCU chip 300 and the power input terminal P2 of the wake-up module 200, that is, the BMS cannot be awakened by the wake-up module 200.
[0037] It should be noted that in the actual application of the BMS, the enable input terminal EN of the 5v power module 400 also has an enable signal input of other wake-up sources, which is not shown in the Figure 1 application; when the enable signal input by the other wake-up source can awaken the BMS, the 5v power module 400 outputs a 5v direct current power supply to supply power to the MCU chip 300 and the power input terminal P2 of the wake-up module 200, so as to awaken the BMS.
[0038] When the charging gun is inserted and the output terminal T10 of the input control module 100 is 2v and the output terminal T25 is 0v, then the wake-up input terminal WKN of the wake-up module 200 is 2v and the input terminal WA is 0v. If the BMS is in a sleep state, at this time the enable input terminal EN of the 5v power module 400 is low 0v and will not output 5v DC power. Although the switch tube Q2 is turned on, because the power input terminal P2 has no 5v power input, the switch tube M2 is cut off. The resistor R25 makes the switch tube M30 cut off. At the same time, because the wake-up input terminal WKN is 2v, the zener D1 is not broken down. The switch tubes Q1 and M15 are cut off. The resistor R37 makes the switch tube M21 cut off. Because the input terminal WA is 0v, the switch tube M16 is also cut off. Therefore, the switch tube M31 is cut off, making the wake-up output terminal Wake of the wake-up module 200 low 0v, which will not make the 5v power module 400 output 5v power to supply the MCU chip 300, so the BMS will not be awakened by the inserted gun.
[0039] It should be noted that when the output terminal T10 of the input control module 100 is 2v, the output terminal T25 is 0v, and the working principle of the input control module 100 is described in detail.
[0040] When the charging gun is inserted and the output terminal T10 of the input control module 100 is 4v and the output terminal T25 is 0v, then the wake-up input terminal WKN of the wake-up module 200 is 4v and the input terminal WA is 0v. Because the input terminal WA is 0v, the switch tube M16 is cut off. If the BMS is in a sleep state, at this time the enable input terminal EN of the 5v power module 400 is low 0v and will not output 5v DC power. Therefore, the switch tubes M2 and M30 are cut off. Because the wake-up input terminal WKN is 4v, the zener D1 is broken down. Therefore, the switch tubes Q1 and M15 are turned on, and the output terminal T13 of the wake-up module 200 is high, making the switch tube M21 conductive and then making the switch tube Q2 cut off. Even if the wake-up input terminal WKN is 4v, it can make the switch tube Q2 conductive, but because the switch tube M21 is conductive, the switch tube Q2 is cut off, making the switch tubes M2 and M30 also cut off. Therefore, the switch tube M31 is cut off. Because the switch tubes Q1 and M15 are conductive, the 12v power supply passes through the switch tube M15, the resistor R23 and the diode D2 to make the wake-up output terminal Wake high, and the voltage level is equal to the voltage after the 12v power supply voltage is divided by the resistor R23 and the resistor R24. This can make the 5v power module 400 output 5v DC power to supply the MCU chip 300 and the power input terminal P2, thereby realizing the BMS gun insertion awakening.
[0041] It should be noted that when the output end T10 of the input control module 100 is 4v, the output end T25 is 0v, and the working principle of the input control module 100 is described in detail.
[0042] When the BMS is awakened by the inserted gun, if the output end T10 of the input control module 100 is 2v and the output end T25 is 0v, the wake-up input end WKN of the wake-up module 200 is 2v, and the input end WA is 0v; the input end WA is 0v, which makes the switch tube M16 cut off, and the wake-up input end WKN is 2v, which makes the voltage stabilizing tube D1 cut off, so that the switch tube Q1 and M15 cut off, the output end T13 is low 0v, and then the switch tube M21 and the diode D2 are cut off, at this time the capacitor C1 makes the wake-up output end Wake continue to keep high level, the purpose is to make the BMS keep the gun insertion wake-up state as long as the charging gun is inserted, and the wake-up output end Wake becomes low 0v only when the charging gun is pulled out; the output end T10 is 2v and the power input end makes the switch tube Q2 and M2 conduct, because the power input end P2 has 5v power input, the switch tube M30 and M31 are conductive, and the 12v DC power supply passes through the resistor R28 and the diode D3 to make the wake-up output end Wake keep high level, so that the BMS keeps the gun insertion wake-up.
[0043] When the BMS is awakened by the inserted gun, if the output end T10 of the input control module 100 is 2v and the output end T25 is 0v, the wake-up input end WKN of the wake-up module 200 is 2v, and the input end WA is 0v; the input end WA is 0v, which makes the switch tube M16 cut off, and the wake-up input end WKN is 2v, which makes the voltage stabilizing tube D1 cut off, so that the switch tube Q1 and M15 cut off, the output end T13 is low, thereby making the switch tube M21 and the diode D2 cut off, the switch tube M21 cut off makes the switch tube Q2 and M2 cut off, and the switch tube M30 cut off; because the input end WA of the wake-up module 200 is 8v or 10v, the switch tube M16 is conductive, the switch tube M31 is conductive, the 12v power supply passes through the resistor R28 and the diode D3 to make the output end Wake of the wake-up module 200 high level, and the 5v power supply module 400 keeps 5v power output, that is, the BMS keeps the wake-up state.
[0044] It should be noted that the BMS wake-up keeping is to keep the wake-up state after the BMS is awakened by the inserted gun.
[0045] The power input end of the 5v power module 400 is connected with the power output end of the 12v power module 500, and receives 12v direct current power; the power output end of the 5v power module 400 is connected with the power input end P2 of the wake-up module 200 and the power input end of the MCU chip 300, and provides 5v direct current power for the two modules; the enable input end EN of the 5v power module 400 is connected with the output end Wake of the wake-up module 200, and when the enable input end EN has two states of high level and low level, the high level can control the 5v power module to output 5v direct current power, and the low level controls the 5v power module not to output 5v direct current power.
[0046] The power input end of the MCU chip 300 is connected with the power output end of the 5v power module, and receives 5v direct current power; the control output end of the MCU chip 300 is connected with the input end CN2 of the input control module 100, and outputs a switch control signal CN2 for controlling the on-off of the switch S2 of the input control module 100, wherein the switch control signal CN2 has two signal states of high level and low level.
[0047] It should be noted that the MCU chip 60 can be a microprocessor brand, series and model commonly used at present, such as an MC9S12XE series chip (such as MC9S12XEP100) produced by NXP Company, or an S32K series chip (such as S32K344) produced by NXP Company; if an MCU chip produced by another company is selected, the performance parameters can be selected according to the foregoing chip series.
[0048] It should be noted that the internal circuit and working logic of the MCU chip 60 are not within the protection scope of the application, and therefore are not specifically described here.
[0049] Referring to Figure 1 The working principle of the CC1 signal wake-up circuit provided by the application is as follows: When the BMS is not connected with 12v / 24v vehicle power supply and no charging gun is inserted, the 12v power module 500 and the 5v power module 400 have no direct current power output, and at the same time, the switch S2 in the switch S2 module 600 is closed, the input end IN1 of the input control module 100 is at low level, the output ends T10 and T25 of the input control module 100 are at low level, the output end Wake of the wake-up module 200 is at low level, and the control output end of the MCU chip 300 is at low level.
[0050] When the BMS is connected to the 12v / 24v vehicle power supply and no charging gun is inserted, the 12v power supply module 500 outputs a 12v power supply, the switch S2 in the switch S2 module 600 remains closed, and the input end IN1 of the input control module 100 is at a low level: if the BMS is awakened by other awakening sources at this time, the 5v power supply module outputs a 5v power supply to supply power to the MCU chip 300, the control output end of the MCU chip 300 is at a low level, the input end CN2 of the input control module 100 is at a low level, and since the input end IN1 of the input control module 100 is at a low level, both the output ends T10 and T25 of the input control module 100 are at a low level, the awakening output end Wake of the awakening module 200 is at a low level, and the gun insertion awakening is invalid: if the BMS is in a sleep state at this time, since no charging gun is inserted, the signal state at the CC1 end is 0v, the output ends T10 and T25 of the input module 100 are at a low level, the output end Wake of the awakening module 200 is controlled to be at a low level, and the gun insertion awakening is also invalid. The 5v power supply module does not supply power to the MCU chip 300, and the control output end of the MCU chip 300 is at a low level.
[0051] When the BMS is connected to the 12v / 24v vehicle power supply and the BMS is awakened and a charging gun is inserted, the 12v power supply module 500 outputs a 12v power supply, and the 5v power supply module outputs a 5v power supply to supply power to the MCU chip 300: Among them, if the switch S1 in the charging gun CC1 interface module 700 is closed, when the control output end of the MCU chip 300 is at a low level, the input end KS2 and the input end CN2 are both at a low level, and the switch S2 is controlled to remain closed, at this time, the output end T3 of the switch S2 module is at 4v (see Table 1), the output end T10 of the input module is at a high level, the output end T25 is at a low level, the output end Wake of the awakening module 200 outputs a high-level awakening signal wake, and the 5v power supply module outputs a 5v power supply. If other awakening sources are invalid at this time, the awakening signal wake can control the 5v power supply module to output a 5v power supply, and the gun insertion awakening is realized.
[0052] Among them, if the switch S1 in the charging gun CC1 interface module 700 is closed, when the control output end of the MCU chip 300 is at a high level, the input end KS2 and the input end CN2 are both at a high level, and the switch S2 is controlled to be open, at this time, the output end T3 of the switch S2 module is at 10v (see Table 1), the output end T10 of the input module is at a low level, the output end T25 is at a high level, the output end Wake of the awakening module 200 continues to output a high-level awakening signal wake, and the BMS remains awakened.
[0053] Wherein, if the switch S1 in the charging gun CC1 interface module 700 is disconnected, when the control output end of the MCU chip 300 is low, the input end KS2 and the input end CN2 are both low, the switch S2 is controlled to keep closed, at this time, the output end T3 of the switch S2 module is 2v (see table 1), the output end T10 of the input module is high, the output end T25 is low, the output end Wake of the wake-up module 200 outputs the high-level wake-up signal wake, the 5v power supply module can output 5v power supply, if other wake-up sources are invalid at this time, the wake-up signal wake signal can control the 5v power supply module to output 5v power supply, so that the BMS keeps wake-up.
[0054] Wherein, if the switch S1 in the charging gun CC1 interface module 700 is disconnected, when the control output end of the MCU chip 300 is high, the input end KS2 and the input end CN2 are both high, the switch S2 is controlled to be disconnected, at this time, the output end T3 of the switch S2 module is 8v (see table 1), the output end T10 of the input module is low, the output end T25 is high, the output end Wake of the wake-up module 200 outputs the high-level wake-up signal wake, the 5v power supply module can output 5v power supply, if other wake-up sources are invalid at this time, the wake-up signal wake signal can control the 5v power supply module to output 5v power supply, so that the BMS keeps wake-up.
[0055] When the BMS accesses the 12v / 24v vehicle power supply and the BMS is in sleep and the charging gun is inserted, the 12v power supply module 500 outputs 12v power supply, and the 5v power supply module does not supply power to the MCU chip 300: Wherein, if the switch S1 in the charging gun CC1 interface module 700 is disconnected, when the control output end of the MCU chip 300 is low, the input end KS2 and the input end CN2 are both low, the switch S2 is controlled to keep closed, at this time, the output end T3 of the switch S2 module is 4v (see table 1), the output end T10 of the input module is high, the output end T25 is low, the output end Wake of the wake-up module 200 outputs the high-level wake-up signal wake, the 5v power supply module can output 5v power supply, if other wake-up sources are invalid at this time, the wake-up signal wake signal can control the 5v power supply module to output 5v power supply, so that the BMS keeps wake-up. The second aspect of the application provides a battery management system, which adopts the CC1 wake-up method to realize plug-in gun wake-up and wake-up keeping.
[0056] The third aspect of the application provides a vehicle comprising the battery management system.
[0057] The relay self-locking driving circuit of the application is simple in structure, does not use a special driving self-locking chip, and uses general types of components, and can be implemented by domestic components, and has low cost; the relay driving self-locking method of the application can avoid abnormal relay driving functions caused by BMS software and hardware faults, thereby avoiding abnormal disconnection of the relay in the driving mode, and improving the fault tolerance rate of the BMS. It should be pointed out that, for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the principles of the application, and these improvements and refinements should also be regarded as the protection scope of the application.
Claims
1. A CC1 DC charging wake-up circuit, characterized in that: include: Input control module (100), wake-up module (200), MCU chip (300), 5V power module (400), 12V power module (500), switch S2 module (600) and charging gun CC1 interface module (700); The input end of the 12V power module (500) is connected to the vehicle power supply, and the output end is connected to the power input end of the switch S2 module (600), the input control module (100), the 5V power module (400) and the wake-up module (200); The input end of the switch S2 module (600) is connected to the charging gun CC1 interface module (700) via the internal switch S of the vehicle charging plug, and the output end T3 is connected to the input end IN1 of the input control module (100); The input terminal CN2 of the input control module (100) is connected to the control output terminal of the MCU chip (300), and the output terminals T10 and T25 are respectively connected to the input terminals WKN and WA of the wake-up module (200); The output terminal Wake of the wake-up module (200) is connected to the enable terminal EN of the 5V power supply module (400); The output end of the 5V power supply module (400) is connected to the power input end P2 of the MCU chip (300) and the wake-up module (200); Wherein, the input control module (100) is configured to: Generate wake-up control signals T10 and T25 according to the CC1 signal state 0V / 2V / 4V / 8V / 10V of the output terminal T3 and the control signal CN2 of the MCU chip (300); The wake-up module (200) is configured to: When T10 is high, it outputs a high-level wake-up signal to the enable terminal EN, triggering the gun plug wake-up; When T25 is at a high level, a high-level wake-up signal is output to the enable terminal EN to maintain the BMS wake-up state.
2. The circuit according to claim 1, wherein: The input control module (100) comprises: resistors R1 to R16, a switch tube M1, a switch tube M3, a switch tube M8, a switch tube M9, a switch tube M10, a switch tube M12, a switch tube M25, and a switch tube M29; The input terminal IN1 is connected to the source of the switch tube M8 through the resistor R9, and the drain of the switch tube M8 is connected to the output terminal T10; The input terminal CN2 is connected to the gate of the switch tube M9 through the resistor R1, and the drain of the switch tube M9 is connected to the gate of the switch tube M29 through the resistor R7; The output terminal T25 is connected to the drain of the switch tube M1 and the drain of the switch tube M10 through the resistor R14.
3. The circuit according to claim 1, wherein: The wake-up module (200) comprises: Resistors R20 to R36, switches Q1, Q2, M2, M15, M16, M21, M30, and M31; The input terminal WKN is connected to the base of the switch tube Q1 through the voltage regulator tube D1, and the collector of the switch tube Q1 is connected to the gate of the switch tube M15; The input terminal WA is connected to the gate of the switch tube M16, and the drain of the switch tube M16 is connected to the gate of the switch tube M31 through the resistor R30; The output terminal Wake is connected to the cathode of the diode D2 / D3 and the capacitor C1 .
4. The circuit according to claim 1, wherein: The switch S2 in the switch S2 module (600) is a normally closed relay, which is closed when any of the following conditions is met: BMS is in sleep mode and the vehicle's 12V / 24V power supply is connected; No vehicle power access.
5. The circuit according to claim 1, wherein: The wake-up logic of the wake-up module (200) satisfies: When the input terminal WKN is high and WA is low, the gun plug wake-up is triggered; When the input terminal WKN is at a low level and WA is at a high level, the BMS is kept in the awake state.
6. A CC1 DC charging wake-up method, applied to the circuit according to any one of claims 1 to 5, characterized in that: include: Detecting the CC1 signal status of the charging gun CC1 interface module (700); Generate wake-up control signals T10 and T25 based on the CC1 signal state and the control signal CN2 of the MCU chip (300); When T10 is at a high level, the control wake-up module (200) outputs a high-level wake-up signal to the 5V power module (400), triggering the BMS gun plug wake-up; When T25 is at a high level, the control wake-up module (200) outputs a high-level wake-up signal to the 5V power supply module (400) to maintain the BMS wake-up state.
7. The method according to claim 6, characterized in that The mapping between CC1 signal status and wake-up logic includes: When CC1 is 4V and CN2 is low, output T10 is high, triggering the gun plug wake-up; When CC1 is 10V and CN2 is high, output T25 is high, maintaining the awake state.
8. The method according to claim 6, characterized in that In the BMS wake-up state: When CC1 is 2V and CN2 is at a low level, the wake-up module (200) maintains the wake-up signal through the capacitor C1; When CC1 is 8V or 10V and CN2 is at a high level, the wake-up module (200) maintains the wake-up signal through the switch tube M31.
9. A battery management system, characterized in that: include: The CC1 DC charging wake-up circuit according to any one of claims 1 to 5; The MCU chip (300) is configured as follows: Outputting a control signal CN2 in the awake state to control the on and off of the switch S2 module (600); Dynamically adjust the level state of CN2 according to the charging protocol.
10. A vehicle, characterized in that: Including the battery management system according to claim 9.