CN210007371U

CN210007371U - Power battery anti-ignition control circuit

Info

Publication number: CN210007371U
Application number: CN201921104582.2U
Authority: CN
Inventors: 何长春; 万益明
Original assignee: SHENZHEN CITY RUIDE ELECTRONIC INDUSTRIAL Co Ltd
Current assignee: SHENZHEN CITY RUIDE ELECTRONIC INDUSTRIAL Co Ltd
Priority date: 2019-07-15
Filing date: 2019-07-15
Publication date: 2020-01-31
Anticipated expiration: 2029-07-15

Abstract

kind of power battery prevents control circuit that strikes sparks, including power management circuit, two output interfaces, communication interface and control interface, two output interfaces respectively with the two electrode electric connection of battery, communication interface and power management circuit electric connection, still include detection circuit and main loop switch, the both ends of detection circuit respectively with power management circuit's MCU and control interface electric connection, the wherein electrode of battery, main loop switch and wherein output interface establish ties in proper order, MCU's output control end and main loop switch electric connection, when MCU detects detection circuit for high level or low level, MCU's output control end control main loop switch disconnection or switch-on.

Description

Power battery anti-ignition control circuit

Technical Field

The utility model belongs to the technical field of the electronic product technique and specifically relates to a control circuit that strikes sparks is prevented to kinds of power battery.

Background

The existing plug or wiring circuit does not fully consider the sparking phenomenon generated when a power battery is connected, poor contact can be generated at the moment when the wiring plug is inserted when the power battery is connected, the contact resistance is large, and great electric spark can be formed by generated great heat to cause the surface ablation of the wiring plug. Over time, the terminal plug may be in poor contact, and the contact resistance may be too high to generate heat, which may lead to direct burning of the terminal plug.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problem, the utility model provides an kinds of power battery prevent control circuit that strikes sparks, the phenomenon of striking sparks that produces when power battery inserts can be eliminated to this circuit.

The technical scheme of the utility model is that power battery control circuit of preventing striking sparks is provided, including power management circuit, two output interfaces, communication interface and control interface, two the output interface respectively with the two electrode electric connection of battery, communication interface with power management circuit electric connection still include detection circuitry and main circuit switch, the both ends of detection circuitry respectively with power management circuit's MCU with control interface electric connection, wherein electrode of battery, main circuit switch and wherein the output interface is established ties in proper order, MCU's output control end with main circuit switch electric connection;

when the MCU detects that the detection circuit is at a high level or a low level, the output control end of the MCU controls the main loop switch to be switched off or switched on.

As to the improvement of the utility model, two the output interface is positive electrode output interface and negative electrode output interface respectively.

As an improvement of the present invention, the detection circuit includes th resistor, a second resistor, a third resistor and a triode, the base of the triode is electrically connected with th resistor and th resistor respectively, another th resistor of the th resistor is electrically connected with the control interface, another th resistor is grounded, the emitter of the triode is grounded, the collector of the triode is electrically connected with th resistor of the MCU and the third resistor respectively, and another th resistor of the third resistor is electrically connected with the power supply.

As a right improvement of the utility model, the detection circuit includes fourth resistance, fifth resistance, sixth resistance and MOS pipe, the grid of MOS pipe respectively with the fourth resistance with the end electric connection of fifth resistance, the end in addition of fourth resistance with control interface electric connection, end in addition of fifth resistance ground connection, the source electrode ground connection of MOS pipe, the drain electrode of MOS pipe respectively with MCU with end electric connection of sixth resistance, end in addition of sixth resistance and power electric connection.

As right the utility model discloses an improvement, the main loop switch includes discharge switch and the switch that charges, discharge switch with the switch that charges establishes ties, two output control ends of MCU respectively with discharge switch with the switch electric connection that charges, control discharge switch with the disconnection or the switch-on of the switch that charges.

The utility model discloses owing to adopted detection circuitry and main loop switch circuit, it is th level to detect detection circuitry when MCU, MCU's output control end control main loop switch disconnection, the phenomenon of striking sparks that appears when having avoided the power battery to insert, prevent that wiring plug surface from ablating, prevent to burn out the wiring plug, greatly reduced because of the higher cost that regular change wiring plug produced, reducible wiring plug frequency simultaneously, reduce wearing and tearing, the life of improvement wiring plug.

Drawings

Fig. 1 is a schematic block diagram of the circuit principle of the present invention.

Fig. 2 is a circuit diagram of embodiments of the circuit of fig. 1.

Fig. 3 is a circuit diagram of another embodiments of the circuit of fig. 1.

Wherein: 1. the device comprises a battery, a power supply management circuit, a MCU (micro control unit) 21, a discharge switch 31, a charge switch 32, a detection circuit 4, a positive electrode output interface 5, a control interface 6, a communication interface 7 and a negative electrode output interface 8.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", and the like, refer to orientations or positional relationships based on the orientation shown in the drawings, and are used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or assembly referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present invention.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" shall be construed , and for example, they may be fixedly connected, detachably connected, or physically connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, and communicating between two components.

Referring to fig. 1 and fig. 2, fig. 1 shows a block diagram of kinds of power battery ignition prevention control circuits, fig. 2 shows a circuit diagram of embodiments of the detection circuit 4 of the present invention, the power battery ignition prevention control circuit includes a power management circuit 2, two output interfaces, a communication interface 7 and a control interface 6, the two output interfaces are respectively electrically connected to two electrodes of a battery 1, the communication interface 7 is electrically connected to the power management circuit 2, the two output interfaces are respectively a positive electrode output interface 5 and a negative electrode output interface 8, the two electrodes of the battery 1 are respectively a positive electrode and a negative electrode, it should be noted that the power management circuit 2 is a prior art, and the present invention does not improve the same.

In this embodiment, the battery pack further comprises a detection circuit 4 and a main loop switch, two ends of the detection circuit 4 are respectively electrically connected with the INT pin of the MCU21 of the power management circuit 2 and the control interface 6, wherein electrodes of the battery 1, the main loop switch and of the output interfaces are sequentially connected in series, that is, electrodes of the battery 1, the main loop switch and the negative electrode output interface 8 are sequentially connected in series, and an output control end of the MCU21 is electrically connected with the main loop switch.

When the MCU21 detects that the detection circuit 4 is at a high level or a low level, the output control end of the MCU21 controls the main loop switch to be switched off or switched on.

In this embodiment, the detection circuit 4 includes an th resistor R1, a second resistor R2, a third resistor R3 and a transistor T1, the base of the transistor T1 is electrically connected to the ends of the th resistor R1 and the second resistor R2, the other end C of the th resistor R1 is electrically connected to the control interface 6, the other end of the second resistor R2 is electrically connected to the GND, the emitter of the transistor T1 is electrically connected to the GND, the collector of the transistor T1 is electrically connected to the INT pin of the MCU21 and the end of the third resistor R3, the other end of the third resistor R3 is electrically connected to the power source VCC, the voltage of the power source VCC is 3.3V, which is only for illustration and the invention is not limited thereto.

In this embodiment, the main circuit switch includes a discharging switch 31 and a charging switch 32, the discharging switch 31 is connected in series with the charging switch 32, and two output control terminals DO and CO of the MCU21 are electrically connected to the discharging switch 31 and the charging switch 32 respectively, so as to control the discharging switch 31 and the charging switch 32 to be turned on or off. The discharging switch 31 may be a triode switch, a MOS transistor switch or other controllable switch, and the charging switch 32 may be a triode switch, a MOS transistor switch or other controllable switch.

The utility model discloses a theory of operation is: the power battery ignition prevention control circuit (female seat) comprises a positive electrode output interface 5, a negative electrode output interface 8, a communication interface 7 and a control interface 6. The wiring plug comprises a positive electrode input interface, a negative electrode input interface, a communication input interface and a control input interface, wherein the positive electrode input interface is in short circuit with the interior of the control input interface.

When the power supply is powered on, a wiring plug is inserted into the female socket, the positive electrode output interface 5 is electrically connected with the positive electrode input interface, the negative electrode output interface 8 is electrically connected with the negative electrode input interface, the communication interface 7 is electrically connected with the communication input interface, and the control interface 6 is electrically connected with the control input interface.

The positive electrode input interface is in short circuit with the inside of the control input interface, the control interface 6 is connected with the positive electrode of the battery 1 through the control input interface, the positive electrode input interface and the positive electrode output interface 5, the positive electrode of the battery 1 is connected with the detection circuit 4, the positive electrode of the battery 1 is divided by the resistor R1 and the second resistor R2 to drive the triode T1 to be connected, the MCU21 detects that the INT pin is in a low level, the MCU21 controls the two output control ends DO and CO to respectively output a high level, the two output control ends DO and CO respectively control the discharge switch 31 and the charge switch 32 to be connected, the negative electrode of the battery 1 is connected with the negative electrode input interface through the negative electrode output interface 8, and the battery 1 is charged and discharged normally.

When the connection plug is not inserted into the female socket, the positive electrode output interface 5 is not electrically connected with the positive electrode input interface, the negative electrode output interface 8 is not electrically connected with the negative electrode input interface, the communication interface 7 is not electrically connected with the communication input interface, and the control interface 6 is not electrically connected with the control input interface.

The triode T1 is not turned on, the MCU21 detects that the INT pin is at a high level, the MCU21 controls the two output control terminals DO and CO to output a low level respectively, and the two output control terminals DO and CO control the discharge switch 31 and the charge switch 32 to be turned off respectively, thereby preventing sparking.

Referring to fig. 3, fig. 3 shows a circuit diagram of another embodiment of the detection circuit 4 of the present invention, the detection circuit 4 includes a fourth resistor R4, a fifth resistor R5, a sixth resistor R6 and a MOS transistor Q1, the gate of the MOS transistor Q1 is electrically connected to the ends of the fourth resistor R4 and the of the fifth resistor R5, respectively, the other end C of the fourth resistor R4 is electrically connected to the control interface 6, the other end of the fifth resistor R5 is electrically connected to GND, the source of the MOS transistor Q1 is electrically connected to GND, the drain of the MOS transistor Q1 is electrically connected to the ends of the MCU 8 and the sixth resistor R6, the other end of the sixth resistor R6 is electrically connected to the power source VCC, and the operational principle of the circuit in this embodiment is the same as that in fig. 2.

The utility model discloses owing to adopted detection circuitry and main loop switch circuit, worked as MCU detects detection circuitry is the level, MCU's output control end control the main loop switch disconnection, the phenomenon of striking sparks that appears when having avoided the power battery to insert prevents that wiring plug surface from ablating, prevents to burn out the wiring plug, greatly reduced because of the higher cost that regular change wiring plug produced, reducible wiring plug frequency reduces wearing and tearing simultaneously, improves wiring plug's life.

It should be noted that the detailed explanation of the above embodiments is only for the purpose of explaining the present invention so as to better explain the present invention, but these descriptions should not be construed as limiting the present invention for any reason, and especially, the features described in the different embodiments can be arbitrarily combined with each other to constitute other embodiments, and besides the explicit opposite descriptions, these features should be understood as being applicable to any embodiments, and not limited to the described embodiments.

Claims

The ignition prevention control circuit for the power battery is characterized by further comprising a detection circuit and a main circuit switch, wherein two ends of the detection circuit are electrically connected with an MCU (microprogrammed control unit) of the power management circuit and the control interface respectively, electrodes, the main circuit switch and output interfaces of the battery are connected in series in sequence, an output control end of the MCU is electrically connected with the main circuit switch, and when the MCU detects that the detection circuit is at a high level or a low level, the output control end of the MCU controls the main circuit switch to be switched on or off.
2. The power battery ignition prevention control circuit according to claim 1, characterized in that: the two output interfaces are respectively a positive electrode output interface and a negative electrode output interface.
3. The power battery anti-sparking control circuit as set forth in claim 1 or 2, characterized in that said detection circuit includes th resistor, a second resistor, a third resistor and a triode, the base of said triode is electrically connected with ends of said th resistor and said second resistor respectively, another end of said th resistor is electrically connected with said control interface, another end of said second resistor is grounded, the emitter of said triode is grounded, the collector of said triode is electrically connected with ends of said MCU and said third resistor respectively, and another end of said third resistor is electrically connected with a power supply.
4. The power battery anti-sparking control circuit as claimed in claim 1 or 2, characterized in that the detection circuit comprises a fourth resistor, a fifth resistor, a sixth resistor and an MOS transistor, the grid electrodes of the MOS transistor are respectively electrically connected with ends of the fourth resistor and the fifth resistor, the other end of the fourth resistor is electrically connected with the control interface, the other end of the fifth resistor is grounded, the source electrode of the MOS transistor is grounded, the drain electrodes of the MOS transistor are respectively electrically connected with ends of the MCU and the sixth resistor, and the other end of the sixth resistor is electrically connected with a power supply.
5. The power battery ignition prevention control circuit according to claim 1 or 2, characterized in that: the main loop switch comprises a discharge switch and a charge switch, the discharge switch is connected with the charge switch in series, and two output control ends of the MCU are respectively electrically connected with the discharge switch and the charge switch to control the disconnection or connection of the discharge switch and the charge switch.