An automatic sleep control system for lithium-ion power battery system

Abstract

The present invention relates to the field of batteries, and in particular to an automatic dormancy control system applied to a lithium power battery system, comprising a controller, a dormancy circuit, a power supply circuit and a power-on circuit, wherein the controller, the dormancy circuit, the power supply circuit and the power-on circuit are electrically connected in sequence; wherein the controller is used to send a control instruction to control the dormancy circuit to disconnect when the automatic dormancy condition is met; the dormancy circuit is used to receive and disconnect the control instruction sent by the controller to control the dormancy circuit to disconnect; the power supply circuit is used to control the power supply and stop the power supply when the dormancy circuit is disconnected; the power-on circuit is used to control the power supply of electrical equipment, and control the power supply of electrical equipment to be powered off when the power supply circuit stops supplying power. When the automatic dormancy condition is met, all power supply equipment of the present invention will be powered off, thereby ensuring that the battery cell will not be in an empty state, so that its discharge performance and service life will not be affected.

Description

Technical Field

[0001] The present invention relates to the field of batteries, and in particular to an automatic dormancy control system applied to a lithium power battery system. Background Art

[0002] In recent years, with the substantial growth of the new energy vehicle industry, new power lithium-ion batteries have become the ideal power source for the new generation of electric vehicles due to their excellent performance. Among them, the power supply systems of electric forklifts, sightseeing tour buses, electric bicycles, golf carts, etc. all use lithium-ion power as the power source. The key point is that the power battery must have stable, efficient and long-lasting working capabilities, and the most important point is that it can still maintain sufficient power and good battery consistency after the vehicle has not been used for a long time, so as to ensure the normal operation of the vehicle.

[0003] However, there are certain hidden dangers in the existing power supply system solutions on the market, that is, they include a variety of power-consuming devices, such as: contactors, buzzers, switching power supplies, LEDs, display instruments, GPRS, etc. The biggest disadvantage is that when the user forgets to turn off the switch (disconnect the power) after using the car, the above devices will consume the energy of the battery. If the power is not turned off after a period of time, the battery will be discharged (the battery is 0V) in the long run, which greatly damages the performance and consistency of the battery, reduces the number of cycles and service life of the battery, has a great impact on future applications, and also increases the subsequent maintenance costs and affects the safety performance of the system. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes an automatic dormancy control system applied to a lithium power battery system.

[0005] An embodiment of the present invention proposes an automatic sleep control system applied to a lithium-ion power battery system, comprising a controller, a sleep circuit, a power supply circuit and a power-on circuit, wherein the controller, the sleep circuit, the power supply circuit and the power-on circuit are electrically connected in sequence; wherein the controller is used to send a control instruction to the sleep circuit to control the sleep circuit to disconnect when the automatic sleep condition is met; the sleep circuit is used to receive the control instruction sent by the controller to control the sleep circuit to disconnect and disconnect; the power supply circuit is used to control the power supply and stop the power supply when the sleep circuit is disconnected; the power-on circuit is used to control the power-on of the electrical equipment and control the power-off of the electrical equipment when the power supply circuit stops supplying power.

[0006] In one embodiment, the sleep circuit includes MOS tubes Q2, Q4, resistors R1, R3, R10, R13 and diodes D3, D6, D64, the G pole of the MOS tube Q2 is connected to one end of the resistors R3 and R10, the other end of the resistor R3 is connected to the cathode of the diode D6, the anode of the diode D6 is connected to the controller, the other end of the resistor R10 is connected to the common ground, the S pole of the MOS tube Q2 is connected to the common ground, the D pole of the MOS tube Q2 is connected to one end of the resistor R1, the other end of the resistor R1 is connected to the G pole of the MOS tube Q4, one end of the resistor R13 and the anode of the diode D64, the S pole of the MOS tube Q4 is connected to the other end of the resistor R13, the cathode of the diode D64 and the cathode of the diode D3, and the D pole of the MOS tube Q4 is connected to the power-on circuit.

[0007] In one embodiment, the power circuit includes a power chip U1 , and the power chip is connected to the sleep circuit and the power supply circuit.

[0008] In one embodiment, the model of the power chip is LM5017.

[0009] In one embodiment, the power-on circuit includes a relay K1 and a connector, the first end of the relay contact is connected to the power supply circuit, the second end of the relay contact is connected to the first end of the connector, the first end and the second end of the relay coil are conductive, and the fourth end of the connector is connected to the sleep circuit.

[0010] In one embodiment, a reset circuit is further included, and the reset circuit is connected to the power supply circuit.

[0011] In one embodiment, the reset circuit includes a reset switch K2 for controlling the operation of the power supply circuit, and the reset switch K2 is connected to the power supply circuit.

[0012] The beneficial effects of the present invention are as follows: when the automatic sleep condition is met, the controller sends a control instruction to control the sleep circuit to disconnect, the sleep circuit receives the control instruction sent by the controller to control the sleep circuit to disconnect and disconnects, when the sleep circuit is disconnected, the power circuit stops supplying power, and when the power circuit stops supplying power, the power-on circuit controls the power-consuming device to power off. When the automatic sleep condition is met, all power supply devices will be powered off, that is, no device will consume the energy of the battery, thereby ensuring that the battery cell will not be in an empty state, so it will not affect its discharge performance and service life, and at the same time ensure that the battery will not be unusable due to power consumption the next time it is used, thereby improving the sustainable usability of the product and the customer's good user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0014] Figure 1 This is a schematic diagram of the structure of an automatic dormancy control system applied to a lithium power battery system according to an embodiment of the present invention;

[0015] Figure 2 This is a circuit diagram of a current dormancy circuit in an automatic dormancy control system applied to a lithium power battery system according to an embodiment of the present invention;

[0016] Figure 3 This is a circuit diagram of a power supply circuit in an automatic sleep control system applied to a lithium power battery system according to an embodiment of the present invention;

[0017] Figure 4 This is a circuit diagram of a power-on circuit in an automatic sleep control system applied to a lithium power battery system according to an embodiment of the present invention;

[0018] Figure 5 It is a structural schematic diagram of a reset circuit in an automatic sleep control system applied to a lithium power battery system according to an embodiment of the present invention;

[0019] Figure 6 The present invention is a circuit diagram of a reset circuit in an automatic sleep control system applied to a lithium power battery system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further described below in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.

[0021] The present invention proposes an automatic dormancy control system for a lithium-ion power battery system. Figure 1 As shown, it includes a controller 101, a sleep circuit 102, a power circuit 103 and a power-on circuit 104, and the controller 101, the sleep circuit 102, the power circuit 103 and the power-on circuit 104 are electrically connected in sequence; wherein the controller 101 is used to send a control instruction to the sleep circuit to control the sleep circuit to disconnect when the automatic sleep condition is met; the sleep circuit 102 is used to receive the control instruction sent by the controller to control the sleep circuit to disconnect and disconnect; the power circuit 103 is used to control the power supply and stop the power supply when the sleep circuit is disconnected; the power-on circuit 104 is used to control the power-on of the electrical equipment and control the power-off of the electrical equipment when the power circuit stops supplying power.

[0022] In this embodiment, when the automatic sleep condition is met, all power supply devices will be powered off, that is, no device will consume the energy of the battery, thereby ensuring that the battery cell will not be discharged, so it will not affect its discharge performance and service life. At the same time, it is ensured that the battery will not be unusable due to power consumption the next time it is used, thereby improving the sustainable usability of the product and the customer's good user experience.

[0023] Among them, the automatic sleep conditions include detecting that the system has not worked for a period of time exceeding a set threshold: for example, no work or charging within 48 hours (this time threshold can be set); or detecting that the system battery voltage or the remaining battery capacity is lower than a set threshold, for example, the module voltage with a nominal voltage of 48V drops below 38V; or the remaining battery capacity is less than 5% (this condition threshold can be set), one or more of the following conditions.

[0024] Among them, Figure 2 As shown, the sleep circuit includes MOS tubes Q2, Q4, resistors R1, R3, R10, R13 and diodes D3, D6, D64, the G pole of the MOS tube Q2 is connected to one end of the resistors R3 and R10, the other end of the resistor R3 is connected to the cathode of the diode D6, the anode of the diode D6 is connected to the controller, the other end of the resistor R10 is connected to the common ground, the S pole of the MOS tube Q2 is connected to the common ground, the D pole of the MOS tube Q2 is connected to one end of the resistor R1, the other end of the resistor R1 is connected to the G pole of the MOS tube Q4, one end of the resistor R13 and the anode of the diode D64, the S pole of the MOS tube Q4 is connected to the other end of the resistor R13, the cathode of the diode D64 and the cathode of the diode D3, and the D pole of the MOS tube Q4 is connected to the power-on circuit.

[0025] Among them, Figure 3 As shown, the power circuit includes a power chip U1, the model of the power chip is LM5017, and the power chip is connected to the sleep circuit and the power supply circuit. The power chip also includes surrounding connection circuits, including resistors R46, R47, R48, capacitors C11, and capacitors C2 connected to the power chip U1.

[0026] Among them, Figure 4 As shown, the power-on circuit includes a relay K1 and a connector J2, the first end of the contact of the relay K1 is connected to the power supply circuit, the second end of the contact of the relay K1 is connected to the first end of the connector J2, the first end and the second end of the relay coil are connected through a diode D4, a diode D5 and a resistor R6, and the fourth end of the connector is connected to the sleep circuit.

[0027] In one embodiment, if Figure 5 As shown, the automatic sleep control system further includes a reset circuit 105 , and the reset circuit 105 is connected to the power supply circuit 103 .

[0028] Among them, Figure 6 As shown, the reset circuit includes a reset switch K2 for controlling the operation of the power supply circuit, wherein the reset switch K2 is connected to the power supply circuit, and the reset circuit also includes a connector J1 connected to the reset switch K2.

[0029] The functional principle of the control system power-on is: when the reset switch K2 of the system is closed (closed for 3 to 5 seconds), the module's power B+ will supply power to the power chip U1, and the power chip will work normally, and the step-down output of a 12V power supply controls the relay K1 to be attracted, so that the module's power can provide power to the subsequent entire system through the relay K1 (the normal power supply of the system is controlled by controlling the relay K1), so that the system can operate normally. After the system operates normally, it will output a signal "BMS_DO" to control the MOS tube Q2 to be turned on, and then control the MOS tube Q4 to be turned on, so that the module's B+ continues to supply power to the power chip U1 through the MOS tube Q4, so that the relay K1 continues to be attracted, that is, the system continues to be powered normally (even if the reset switch K2 is disconnected); when the actual situation meets the automatic sleep condition, the system's control signal "BMS_DO" will control the MOS tube Q2 to be disconnected, thereby controlling the MOS tube Q4 to be disconnected, thereby cutting off the power supply of the power chip U1, causing the relay K1 to be disconnected, thereby cutting off the power supply of the entire system, so as to achieve the purpose of putting the system into sleep mode. The next time you use the battery, you only need to restart the system, which reduces the power consumption of the lithium battery power module and indirectly ensures the performance and service life of the battery cell.

[0030] Those skilled in the art to which the present invention relates may make various modifications or additions to the specific embodiments described or replace them in a similar manner, but they will not deviate from the spirit of the present invention or exceed the scope defined by the attached claims.

Claims

1. An automatic dormancy control system applied to a lithium power battery system, characterized in that: The invention comprises a controller, a sleep circuit, a power circuit and a power-on circuit, wherein the controller, the sleep circuit, the power circuit and the power-on circuit are electrically connected in sequence; wherein the controller is used to send a control instruction to the sleep circuit to control the disconnection of the sleep circuit when the automatic sleep condition is met; the sleep circuit is used to receive the control instruction sent by the controller to control the disconnection of the sleep circuit and disconnect it; the power circuit is used to control the power supply and stop the power supply when the sleep circuit is disconnected; the power-on circuit is used to control the power-on of the electric device and control the power-off of the electric device when the power circuit stops supplying power; the automatic sleep condition includes one or more of the following conditions: detecting that the system has not worked for a time exceeding a set threshold within a certain period of time, or detecting that the system battery voltage or the remaining capacity of the battery is lower than a set threshold; The sleep circuit includes MOS tubes Q2, Q4, resistors R1, R3, R10, R13 and diodes D3, D6, D64, the G pole of the MOS tube Q2 is connected to one end of the resistors R3 and R10, the other end of the resistor R3 is connected to the cathode of the diode D6, the anode of the diode D6 is connected to the controller, the other end of the resistor R10 is connected to the common ground, the S pole of the MOS tube Q2 is connected to the common ground, the D pole of the MOS tube Q2 is connected to one end of the resistor R1, the other end of the resistor R1 is connected to the G pole of the MOS tube Q4, one end of the resistor R13 and the anode of the diode D64, the S pole of the MOS tube Q4 is connected to the other end of the resistor R13, the cathode of the diode D64 and the cathode of the diode D3, and the D pole of the MOS tube Q4 is connected to the power-on circuit; The power-on circuit includes a relay K1 and a connector J2, the first end of the contact of the relay K1 is connected to the power circuit, the second end of the contact of the relay K1 is connected to the first end of the connector J2, the first end and the second end of the relay coil are conductive, and the fourth end of the connector J2 is connected to the sleep circuit.

2. The automatic dormancy control system for a lithium-ion power battery system according to claim 1, characterized in that: The power circuit includes a power chip U1 , and the power chip is connected to the sleep circuit and the power supply circuit.

3. The automatic dormancy control system for a lithium-ion power battery system according to claim 2, characterized in that: The model of the power chip is LM5017.

4. An automatic dormancy control system for a lithium-ion power battery system according to any one of claims 1 to 3, characterized in that: A reset circuit is also included, and the reset circuit is connected to the power supply circuit.

5. The automatic dormancy control system for a lithium power battery system according to claim 4, characterized in that: The reset circuit includes a reset switch K2 for controlling the operation of the power supply circuit, and the reset switch K2 is connected to the power supply circuit.

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