CN215944307U

CN215944307U - Automatic dormancy control system applied to lithium battery power battery system

Info

Publication number: CN215944307U
Application number: CN202122119040.6U
Authority: CN
Inventors: 吴绍栋; 何俐鹏; 王敏; 徐英君; 钟磊
Original assignee: Hangzhou Vmhstar Technology Co ltd
Current assignee: Hangzhou Vmhstar Technology Co ltd
Priority date: 2021-09-03
Filing date: 2021-09-03
Publication date: 2022-03-04
Anticipated expiration: 2031-09-03

Abstract

The utility model relates to the field of batteries, in particular to an automatic dormancy control system applied to a lithium-ion battery system, which comprises a controller, a dormancy circuit, a power circuit and a power-on circuit, wherein the controller, the dormancy circuit, the power circuit and the power-on circuit are electrically connected in sequence; the controller is used for sending a control instruction for controlling the disconnection of the sleep circuit to the sleep circuit when the automatic sleep condition is met; the sleep circuit is used for receiving a control instruction sent by the controller and controlling the sleep circuit to be disconnected and disconnecting the sleep circuit; the power supply circuit is used for controlling power supply and stopping power supply when the dormancy circuit is disconnected; the power-on circuit is used for controlling the power-on of the electric equipment and controlling the power-off of the electric equipment when the power supply circuit stops supplying power. When the automatic dormancy condition is met, all power supply equipment can be powered off, so that the battery cell is ensured not to be in a emptying state, and the discharge performance and the service life of the battery cell are not influenced.

Description

Automatic dormancy control system applied to lithium battery power battery system

Technical Field

The utility model relates to the field of batteries, in particular to an automatic dormancy control system applied to a lithium battery power system.

Background

With the great increase of the new energy automobile industry in recent years, the novel power lithium ion battery becomes an ideal power source of a new generation of electric automobiles by virtue of excellent performance. Wherein power supply systems of the electric forklift, the sightseeing bus, the electric bicycle, the golf cart and the like adopt a system scheme of taking lithium batteries as power sources. The key point is that the power battery needs to have stable, efficient and durable working capacity, and the most important point is that enough electric quantity and good battery cell consistency can be still maintained after the vehicle is not used for a long time, so that the normal operation of the vehicle is ensured.

However, the power supply system schemes in the existing market all have certain hidden troubles, namely that the power supply system schemes comprise various power consumption devices, such as: contactors, buzzers, switching power supplies, LEDs, display instruments, GPRS, and the like. The most important defect is that when a user forgets to turn off a switch (disconnect a power supply) after the user finishes using a vehicle, the above devices consume the energy of a battery, if the power supply is still not turned off after a period of time, the situation of emptying the battery cell (the battery cell is 0V) can occur in the past, the performance and consistency of the battery cell are greatly damaged, the cycle number and the service life of the battery cell are reduced, great influence is brought to the application in the future, the later maintenance cost is increased, and the safety performance of the system is influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides an automatic dormancy control system applied to a lithium battery system.

The embodiment of the utility model provides an automatic sleep control system applied to a lithium battery system, which 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; the controller is used for sending a control instruction for controlling the disconnection of the sleep circuit to the sleep circuit when the automatic sleep condition is met; the sleep circuit is used for receiving a control instruction sent by the controller and controlling the sleep circuit to be disconnected and disconnecting the sleep circuit; the power supply circuit is used for controlling power supply and stopping power supply when the dormancy circuit is disconnected; the power-on circuit is used for controlling the power-on of the electric equipment and controlling the power-off of the electric equipment when the power supply circuit stops supplying power.

In an embodiment, the sleep circuit includes MOS transistors Q2, Q4, resistors R1, R3, R10, R13 and diodes D3, D6, and D64, the G pole of the MOS transistor Q2 is connected to one ends of the resistors R3 and R10, the other end of the resistor R3 is connected to the negative pole of the diode D6, the positive pole 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 transistor Q10 is connected to the common ground, the D pole of the MOS transistor Q10 is connected to one end of the resistor R10, the other end of the resistor R10 is connected to the G pole of the MOS transistor Q10, one end of the resistor R10 and the positive pole of the diode D10, the S pole of the MOS transistor Q10 is connected to the other end of the resistor R10, the negative pole of the diode D10 and the D pole of the MOS transistor Q10 is connected to the upper circuit.

In one embodiment, the power circuit includes a power chip U1, which connects the sleep circuit and the power supply circuit.

In one embodiment, the power chip is model LM 5017.

In one embodiment, the power-on circuit comprises a relay K1 and a connector, wherein a first end of the relay contact is connected with the power circuit, a second end of the relay contact is connected with a first end of the connector, a first end and a second end of the relay coil are conducted, and a fourth end of the connector is connected with the sleep circuit.

In one embodiment, the power supply further comprises a reset circuit, and the reset circuit is connected with the power supply circuit.

In one embodiment, the reset circuit comprises a reset switch K2 for controlling the operation of the power circuit, and the reset switch K2 is connected with the power circuit.

The utility model has the beneficial effects that: when the automatic dormancy condition is met, the controller sends a control instruction for controlling the dormancy circuit to be disconnected to the dormancy circuit, the dormancy circuit receives the control instruction for controlling the dormancy circuit to be disconnected and is disconnected, the power supply circuit stops supplying power when the dormancy circuit is disconnected, and the power supply circuit controls the power of the electric equipment to be powered off when the power supply circuit stops supplying power. When the automatic dormancy condition is met, all power supply equipment is powered off, namely, the energy of the equipment consumption battery is avoided, so that the battery cell is ensured not to be in a emptying state, the discharging performance and the service life of the battery cell are not influenced, the condition that the battery cell cannot be used due to power consumption is avoided in the next use, and the sustainable usability of the product and the good use experience of a client are improved.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural diagram of an automatic sleep control system applied to a lithium battery system according to an embodiment of the present invention;

fig. 2 is a circuit diagram of a current sleep circuit in an automatic sleep control system for a lithium battery system according to an embodiment of the present invention;

FIG. 3 is a circuit diagram of a power circuit in an automatic sleep control system for a lithium battery system, according to an embodiment of the present invention;

FIG. 4 is a circuit diagram of an upper circuit in an automatic sleep control system for a lithium battery system according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a reset circuit in an automatic sleep control system for a lithium battery system according to an embodiment of the present invention;

fig. 6 is a circuit diagram of a reset circuit in an automatic sleep control system for a lithium battery system according to an embodiment of the present invention.

Detailed Description

The technical solutions of the present invention will be further described below with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

The utility model provides an automatic sleep control system applied to a lithium battery system, which comprises a controller 101, a sleep circuit 102, a power circuit 103 and a power-on circuit 104, wherein the controller 101, the sleep circuit 102, the power circuit 103 and the power-on circuit 104 are electrically connected in sequence; the controller 101 is configured to send a control instruction for controlling the sleep circuit to be turned off to the sleep circuit when the auto-sleep condition is satisfied; the sleep circuit 102 is configured to receive a control instruction sent by the controller to control the sleep circuit to be turned off and turn off; the power supply circuit 103 is used for controlling power supply and stopping power supply when the sleep circuit is disconnected; the power-on circuit 104 is configured to control power-on of the electrical device, and control power-down of the electrical device when the power supply circuit stops supplying power.

This embodiment is when satisfying automatic dormancy condition, and all power supply unit all can be gone down the electricity, can not have the energy of equipment consumption battery promptly again to ensure that the state of unloading can not appear in electric core, so can not influence its discharge performance and life, guarantee simultaneously can not appear when next use because the circumstances that can't use by the power consumption, promote the sustainable usability of product and the good use experience of customer and feel.

Wherein the automatic sleep condition comprises detecting that the system is not working for a certain time period when a set threshold value is exceeded: for example, no work or charge is carried out within 48 hours (the time threshold can be set); or when the system battery voltage or the remaining capacity of the battery is detected to be lower than a set threshold value, for example, the module voltage with the nominal voltage of 48V is reduced to be lower than 38V; or the remaining capacity of the battery is less than 5% (the condition threshold can be set), one or more of which are conditions.

As shown in fig. 2, the sleep circuit includes MOS transistors Q2, Q4, resistors R1, R3, R10, R13, and diodes D3, D6, and D64, the G electrode of the MOS transistor Q2 is connected to one ends of resistors R3 and R10, the other end of the resistor R3 is connected to the negative electrode of the diode D6, the positive electrode of the diode D6 is connected to a controller, the other end of the resistor R10 is connected to a common ground, the S electrode of the MOS transistor Q2 is connected to a common ground, the D electrode of the MOS transistor Q2 is connected to one end of a resistor R1, the other end of the resistor R1 is connected to the G electrode of the MOS transistor Q4, one end of the resistor R13, and the positive electrode of the diode D64, the S electrode of the MOS transistor Q4 is connected to the other end of the resistor R13, the negative electrode of the diode D64, and the D electrode of the diode D3, and the D electrode of the MOS transistor Q4 is connected to the circuit.

As shown in fig. 3, the power supply circuit includes a power supply chip U1, the model of the power supply chip is LM5017, and the power supply chip is connected to the sleep circuit and the power supply circuit. The power supply chip also comprises surrounding connecting circuits which comprise resistors R46, R47 and R48, a capacitor C11 and a capacitor C2 which are connected with the power supply chip U1.

As shown in fig. 4, the power-on circuit includes a relay K1 and a connector J2, a first end of the relay K1 contact is connected to the power circuit, a second end of the relay K1 contact is connected to a first end of the connector J2, a first end and a second end of the relay coil are conducted through a diode D4, a diode D5 and a resistor R6, and a fourth end of the connector is connected to the sleep circuit.

In one embodiment, as shown in fig. 5, the automatic sleep control system further includes a reset circuit 105, and the reset circuit 105 is connected to the power circuit 103.

As shown in fig. 6, the reset circuit includes a reset switch K2 for controlling the operation of the power circuit, the reset switch K2 is connected to the power circuit, and the reset circuit further includes a connector J1 connected to the reset switch K2.

The functional principle of controlling the system power-on is as follows: when a reset switch K2 of the system is closed (3-5S is closed), the electricity B + of the module supplies power to a power chip U1, the power chip works normally, one 12V power supply control relay K1 outputs voltage reduction, the electricity of the module supplies power to the subsequent whole system through a relay K1 (the normal power supply of the system is controlled through controlling the relay K1), the system operates normally, one signal BMS _ DO is output after the system operates normally to control the conduction of an MOS tube Q2, and then the conduction of an MOS tube Q4 is controlled, so that the B + of the module continues to supply power to the power chip U1 through the MOS tube Q4, the relay K1 continues to be attracted, and the system continues to supply power normally (even if the reset switch K2 is disconnected); when the actual conditions meet the automatic sleep condition, the control signal "BMS _ DO" of the system controls the MOS transistor Q2 to be disconnected, so as to control the MOS transistor Q4 to be disconnected, thereby cutting off the power supply of the power chip U1, resulting in the relay K1 to be disconnected, thereby cutting off the power supply of the whole system, and achieving the purpose of sleeping the system. When the battery is used next time, only the system needs to be restarted, so that the power consumption of the lithium battery power module is reduced, and the performance and the service life of the battery core are indirectly ensured.

Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Claims

1. An automatic dormancy control system applied to a lithium battery system is characterized by comprising a controller, a dormancy circuit, a power circuit and a power-on circuit, wherein the controller, the dormancy circuit, the power circuit and the power-on circuit are electrically connected in sequence; the controller is used for sending a control instruction for controlling the disconnection of the sleep circuit to the sleep circuit when the automatic sleep condition is met; the sleep circuit is used for receiving a control instruction sent by the controller and controlling the sleep circuit to be disconnected and disconnecting the sleep circuit; the power supply circuit is used for controlling power supply and stopping power supply when the dormancy circuit is disconnected; the power-on circuit is used for controlling the power-on of the electric equipment and controlling the power-off of the electric equipment when the power supply circuit stops supplying power.

2. The automatic sleep control system applied to the lithium-ion power battery system according to claim 1, the sleep circuit is characterized by comprising MOS tubes Q2 and Q4, resistors R1, R3, R10 and R13, diodes D3, D6 and D64, the G pole of the MOS transistor Q2 is connected with one ends of a resistor R3 and a resistor R10, the other end of the resistor R3 is connected with the cathode of a diode D6, the anode of the diode D6 is connected with the controller, the other end of the resistor R10 is connected with the common ground, the S pole of the MOS transistor Q2 is connected with the common ground, the D pole of the MOS transistor Q2 is connected with one end of a resistor R1, the other end of the resistor R1 is connected with 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 transistor Q4 is connected with 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 transistor Q4 is connected with a power-on circuit.

3. The automatic sleep control system for the lithium-ion battery system according to claim 1, wherein the power circuit comprises a power chip U1, and the power chip is connected with the sleep circuit and the power supply circuit.

4. The automatic sleep control system applied to the lithium-ion power battery system as claimed in claim 3, wherein the model of the power chip is LM 5017.

5. The automatic sleep control system applied to the lithium-ion power battery system as claimed in claim 1, wherein the power-up circuit comprises a relay K1 and a connector J2, a first end of a contact of the relay K1 is connected with the power circuit, a second end of a contact of the relay K1 is connected with a first end of a connector J2, a first end and a second end of a relay coil are conducted, and a fourth end of the connector J2 is connected with the sleep circuit.

6. The automatic sleep control system applied to the lithium-ion battery system according to any one of claims 1 to 5, further comprising a reset circuit, wherein the reset circuit is connected with the power circuit.

7. The automatic sleep control system for the lithium-ion power battery system according to claim 6, wherein the reset circuit comprises a reset switch K2 for controlling the operation of the power circuit, and the reset switch K2 is connected with the power circuit.