CN210927183U - Battery overcharge protection management circuit and system - Google Patents
Battery overcharge protection management circuit and system Download PDFInfo
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- CN210927183U CN210927183U CN201922346073.7U CN201922346073U CN210927183U CN 210927183 U CN210927183 U CN 210927183U CN 201922346073 U CN201922346073 U CN 201922346073U CN 210927183 U CN210927183 U CN 210927183U
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Abstract
The utility model discloses a battery overcharge protection management circuit and system, wherein the battery overcharge protection management circuit comprises an acquisition circuit unit, a main control unit, a switch protection unit, a charging end and a wireless broadcasting device, wherein the acquisition circuit unit is connected with a battery and is used for acquiring the current voltage value of the battery; the main control unit is connected with the acquisition circuit unit and the switch protection unit and comprises a first voltage control port and a second voltage control port, and the switch protection unit comprises a first-stage protection circuit and a second-stage protection circuit. Through the first-stage protection circuit and the second-stage protection circuit, when the first-stage protection circuit fails, the main control unit can also control the second-stage protection circuit to be closed to stop charging the battery; the main control unit is also electrically connected with a wireless broadcasting device, so that after the first-stage protection circuit fails, the main control unit controls the wireless broadcasting device to broadcast early warning signals through the signal control end, and the early warning purpose is achieved.
Description
Technical Field
The utility model relates to a battery protection field, concretely relates to battery overcharge protection management circuit, system.
Background
The existing lithium battery can be ignited under the condition of overcharge, and explosion caused by ignition causes huge loss of lives and properties. At present, the safety of charging the batteries is realized by a battery protection board, the battery protection board measures the voltage of each battery, and when the voltage of any one battery exceeds the protection voltage, the battery protection board closes a charging loop.
However, when the MOS transistor in the battery protection board fails, the MOS transistor is still turned on under the condition that the MOS transistor needs to be turned off, and at this time, the voltage of the battery will continuously rise, and after a certain voltage value is reached, the battery will be easily ignited and exploded, thereby causing the loss of personnel and property. Moreover, if the battery is overcharged, a user is difficult to know the condition in time, and the time of emergency rescue is easily delayed.
Disclosure of Invention
The utility model provides a battery overcharge protection management circuit, system can be so that this circuit's overcharge protection effect is better.
For realizing the above technical effect, the technical scheme of the utility model as follows:
a battery overcharge protection management circuit comprises a collection circuit unit, a main control unit, a switch protection unit, a charging end and a wireless broadcasting device, wherein the collection circuit unit is connected with a battery and is used for collecting the current voltage value of the battery;
the main control unit is connected with the acquisition circuit unit and the switch protection unit and comprises a first voltage control port and a second voltage control port, and the switch protection unit comprises a first-stage protection circuit and a second-stage protection circuit; the first voltage control port is connected with the first-stage protection circuit, the second voltage control port is connected with the second-stage protection circuit, and the first-stage protection circuit and the second-stage protection circuit are connected to a loop between the battery and the charger so as to be controlled by the main control unit to realize on-off control of the loop between the battery and the charger;
the main control unit further comprises a signal control port connected with a wireless broadcasting device, and the main control unit generates an early warning signal according to the current voltage value of the battery and controls the wireless broadcasting device to broadcast the early warning signal through the signal control port.
Furthermore, the first-stage protection circuit comprises a first MOS transistor, a gate of the first MOS transistor is connected with the first voltage control port, and a source and a drain of the first MOS transistor are connected to a loop between the battery and the charger.
Furthermore, the second-stage protection circuit comprises a second MOS transistor, a gate of the second MOS transistor is connected to the second voltage control port, and a source and a drain of the second MOS transistor are connected to a loop between the battery and the charger.
Further, an anti-reverse connection circuit is connected in series between the battery and the charger.
Furthermore, the reverse connection preventing circuit comprises a third MOS transistor, a gate of the third MOS transistor is connected with a source of the third MOS transistor and then connected with the charging end, and a source and a drain of the third MOS transistor are connected to a loop between the battery and the charger.
A battery overcharge protection management system comprises a plurality of vehicle-mounted terminals and a network service terminal in communication connection with the vehicle-mounted terminals;
the vehicle-mounted terminal comprises a battery and a battery overcharge protection management circuit connected with the battery;
the battery overcharge protection management circuit is the battery overcharge protection management circuit according to claims 1 to 6.
Furthermore, the battery overcharge protection management system further comprises at least one scanning device, and the scanning device is in communication connection with the vehicle-mounted terminal and the network service terminal and is used for communication relay of the vehicle-mounted terminal and the network service terminal.
Furthermore, the vehicle-mounted terminal is in communication connection with the scanning device through a Bluetooth protocol.
The beneficial effects of the utility model reside in that: by arranging the first-stage protection circuit and the second-stage protection circuit, when the first-stage protection circuit fails, the main control unit can also control the second-stage protection circuit to be closed, so that the charging of the battery is stopped; in addition, the main control unit is also electrically connected with a wireless broadcasting device, so that after the first-stage protection circuit fails, the main control unit can generate an early warning signal according to the current voltage value of the battery, and controls the wireless broadcasting device to broadcast the early warning signal through the signal control end, thereby achieving the purpose of early warning.
Drawings
Fig. 1 is a schematic circuit diagram of a battery overcharge protection management circuit according to an embodiment of the present disclosure.
Fig. 2 is a schematic structural diagram of a battery overcharge protection management system according to an embodiment of the present application.
Fig. 3 is another schematic structural diagram of a battery overcharge protection management system according to an embodiment of the present application.
The specific drawings are identified as follows: the system comprises a battery 1, a collection circuit unit 2, a switch protection unit 3, a first-stage protection circuit 31, a second-stage protection circuit 32, a main control unit 4, a charger 5, a wireless broadcasting device 6, an anti-reverse connection circuit 7, a vehicle-mounted terminal 8, a network service terminal 9, a scanning device 10, a Q1, a first MOS (metal oxide semiconductor) transistor Q2, a second MOS transistor Q3 and a third MOS transistor.
Detailed Description
The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to better understand the advantages and features of the present invention, and to define the scope of the present invention more clearly.
Examples
The embodiment provides a battery overcharge protection management circuit, as shown in fig. 1, fig. 1 shows a circuit of the battery overcharge management circuit, which includes a collecting circuit unit 2 connected to a battery 1 and used for collecting a current voltage value of the battery 1, a switch protection unit 3, a main control unit 4 used for controlling the switch protection unit 3 to be turned on or off, a charging terminal connected to a charger 5, and a wireless broadcasting device 6. Specifically, the acquisition circuit unit 2 comprises a voltage detection input end and a voltage detection output end, wherein the voltage detection input end is connected with the battery 1 in series; for continuously detecting the current voltage value of the battery 1, and the voltage detection output end is connected with the main control unit 4. The main control unit 4 is connected with the acquisition circuit unit 2 and the switch protection unit 3, and comprises a first voltage control port and a second voltage control port, the switch protection unit 3 comprises a first-stage protection circuit 31 and a second-stage protection circuit 32, wherein the first-stage protection circuit 31 and the second-stage protection circuit 32 are respectively connected to a loop between the battery 1 and the charger 5, so that the first-stage protection circuit 31 and the second-stage protection circuit 32 can be controlled by the main control unit 4, and on-off control of the loop between the battery 1 and the charger 5 is realized.
Specifically, the first voltage control port and the second voltage control port have a priority control order. In this embodiment, the condition that the main control unit 4 triggers the first-stage protection circuit 31 to be turned off is set to be that when the voltage value reaches 4.4V, the voltage of 4.4V is not the charging voltage of the overcharge of the battery 1, the first voltage control port in the main control unit 4 triggers the first-stage protection circuit 31 to be turned off, and the second voltage control port does not trigger the second-stage protection circuit 32 to be turned off, that is, the second-stage protection circuit 32 is still in the normal on state, but because the first-stage protection circuit 31 has already turned off the charging loop at this time, the charger 5 stops charging the battery 1 at this time. However, when the first-stage protection circuit 31 fails, that is, the first-stage protection circuit 31 is still in a conducting state, the voltage of the battery 1 continues to rise and exceeds 4.4V, and when the voltage of the voltage detection output terminal received by the main control unit 4 reaches 4.5V, it means that the first-stage protection circuit 31 has failed, and at this time, the second voltage control port controls the second-stage protection circuit 32 to be disconnected, so that the whole charging loop is cut off, and the purpose of protecting the battery 1 is achieved. When one of the protection circuits fails, the other protection circuit still can close the whole charging loop, so that the protection effect on the whole battery is achieved, and the phenomenon of fire and explosion of the battery is avoided.
More specifically, in order to enable the switch protection unit 3 to achieve timely diagnosis and treatment, the main control unit 4 further includes a signal control port connected to the wireless broadcasting device 6, and the main control unit 4 generates an early warning signal according to the current voltage value of the battery 1 and controls the wireless broadcasting device 6 to broadcast the early warning signal through the signal control port. The main control unit 4 can generate an early warning signal according to the current voltage value of the battery 1 while cutting off the second-stage protection circuit 32, and controls the wireless broadcasting device 6 to broadcast the early warning signal through the signal control port.
The wireless broadcasting device 6 is a mass-sending method, and is suitable for monitoring in a dense and wide-range charging place. This to a great extent has reduced artifical monitoring, avoids causing because artifical mistake hidden danger to enlarge to dangerous degree.
In one embodiment, the first stage protection circuit 31 includes a first MOS transistor Q1, the gate of the first MOS transistor Q1 is connected to the first voltage control port, and the source and drain of the first MOS transistor Q1 are connected to the loop between the battery 1 and the charger 5. The main control unit 4 provides an output voltage through the first voltage control port, and when the output voltage reaches the condition that the first MOS transistor is disconnected, the first MOS transistor Q1 is disconnected, the whole charging loop is controlled to be disconnected, and the battery 1 is stopped being charged.
In another embodiment, the second stage protection circuit 32 includes a second MOS transistor Q2, the gate of the second MOS transistor Q2 is connected to the second voltage control port, and the source and the drain of the second MOS transistor Q2 are connected to the loop between the battery 1 and the charger 5. Similar to the disconnection principle of the first MOS transistor Q1, when the main control unit 4 provides an output voltage through the second control port and the output voltage reaches the disconnection condition of the second MOS transistor Q2, the second MOS transistor Q2 is turned off, and the whole charging circuit is controlled to be disconnected, and the charging of the battery 1 is stopped.
In other embodiments, in order to prevent the current of the battery 1 from flowing back to the charger 5 and damaging the charger 5, an anti-reverse connection circuit 7 is connected in series between the battery 1 and the charger 5. Specifically, the reverse connection preventing circuit 7 includes a third MOS transistor Q3, the gate of the third MOS transistor Q3 is connected to the source of the third MOS transistor Q3 and then connected to the charger 5, and the source and the drain of the third MOS transistor Q3 are connected to the loop between the battery 1 and the charger 5.
By arranging the first-stage protection circuit 31 and the second-stage protection circuit 32, when the first-stage protection circuit 31 fails, the main control unit 4 can also control the second-stage protection circuit 32 to be closed, so as to stop charging the battery 1; in addition, the main control unit 4 is electrically connected to the wireless broadcasting device 6, so that after the first-stage protection circuit 31 fails, the main control unit 4 generates an early warning signal according to the current voltage value of the battery 1, and controls the wireless broadcasting device 6 to broadcast the early warning signal through the signal control terminal, thereby achieving the purpose of early warning.
In an embodiment, a battery overcharge protection management system is further disclosed, as shown in fig. 2, fig. 2 shows a structure of the battery overcharge protection management system, which includes a plurality of network service terminals 9 in communication connection with the vehicle-mounted terminals 8. The in-vehicle terminal 8 includes the battery 1 and a battery overcharge protection management circuit connected to the battery 1. The early warning information of the vehicle-mounted terminal 8 can be uploaded to the network service terminal 9 connected with the vehicle-mounted terminal through wireless transmission or network transmission, and a user or other maintenance personnel can access to the network service terminal 9 through communication equipment, so that the information of each vehicle-mounted terminal 8 is acquired, the vehicle-mounted terminal 8 with a fault is screened out, and the aim of rapid maintenance is fulfilled.
In another embodiment, as shown in fig. 3, fig. 3 shows another structure of the battery overcharge protection management system of this embodiment, the battery overcharge protection management system further includes at least one scanning device 10, and the scanning device 10 is in communication connection with the vehicle-mounted terminal 8 and the network service terminal 9, and is used for communication relay of the vehicle-mounted terminal 8 and the network service terminal 9. When the wireless broadcasting device 6 in the battery overcharge protection circuit sends out the warning signal, the scanning device 10 can receive each warning signal. Through this scanning device 10, maintenance personal can select out the vehicle mounted terminal 8 that has a trouble, and then carry out the quick diagnosis and treatment to the vehicle mounted terminal 8 that has a trouble, avoid taking place the phenomenon of catching a fire.
In another embodiment, as shown in fig. 3, the vehicle-mounted terminal 8 and the scanning device 10 are communicatively connected via a bluetooth protocol, and are configured to listen to the warning signals of all the vehicle-mounted terminals 8.
By arranging the first-stage protection circuit 31 and the second-stage protection circuit 32, when the first-stage protection circuit 31 fails, the main control unit 4 can control the second-stage protection circuit 32 to be closed, so that the battery 1 is stopped being charged; in addition, the main control unit 4 is electrically connected to the wireless broadcasting device 6, so that after the first-stage protection circuit 31 fails, the main control unit 4 generates an early warning signal according to the current voltage value of the battery 1, and controls the wireless broadcasting device 6 to broadcast the early warning signal through the signal control terminal, thereby achieving the purpose of early warning.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (8)
1. A battery overcharge protection management circuit is characterized by comprising a collection circuit unit, a main control unit, a switch protection unit, a charging end and a wireless broadcasting device, wherein the collection circuit unit is connected with a battery and is used for collecting the current voltage value of the battery;
the main control unit is connected with the acquisition circuit unit and the switch protection unit and comprises a first voltage control port and a second voltage control port, and the switch protection unit comprises a first-stage protection circuit and a second-stage protection circuit; the first voltage control port is connected with the first-stage protection circuit, the second voltage control port is connected with the second-stage protection circuit, and the first-stage protection circuit and the second-stage protection circuit are connected to a loop between the battery and the charger so as to be controlled by the main control unit to realize on-off control of the loop between the battery and the charger;
the main control unit further comprises a signal control port connected with the wireless broadcasting device, and the main control unit generates an early warning signal according to the current voltage value of the battery and controls the wireless broadcasting device to broadcast the early warning signal through the signal control port.
2. The battery overcharge protection management circuit of claim 1, wherein the first stage protection circuit comprises a first MOS transistor, a gate of the first MOS transistor is connected to the first voltage control port, and a source and a drain of the first MOS transistor are connected to a loop between the battery and the charger.
3. The battery overcharge protection management circuit of claim 1, wherein the second stage protection circuit comprises a second MOS transistor, a gate of the second MOS transistor is connected to the second voltage control port, and a source and a drain of the second MOS transistor are connected to a loop between the battery and the charger.
4. The battery overcharge protection management circuit of claim 1, wherein an anti-reverse connection circuit is connected in series between the battery and the charger.
5. The battery overcharge protection management circuit of claim 4, wherein the reverse connection preventing circuit comprises a third MOS transistor, a gate of the third MOS transistor is connected to a source of the third MOS transistor and then connected to the charging terminal, and a source and a drain of the third MOS transistor are connected to a loop between the battery and the charger.
6. A battery overcharge protection management system is characterized by comprising a plurality of vehicle-mounted terminals and a network service terminal in communication connection with the vehicle-mounted terminals;
the vehicle-mounted terminal comprises a battery and a battery overcharge protection management circuit connected with the battery;
the battery overcharge protection management circuit is the battery overcharge protection management circuit according to any one of claims 1 to 5.
7. The battery overcharge protection management system of claim 6, further comprising at least one scanning device, wherein the scanning device is in communication connection with the vehicle-mounted terminal and the network service terminal, and is used for communication relay of the vehicle-mounted terminal and the network service terminal.
8. The battery overcharge protection management system of claim 7, wherein the vehicle-mounted terminal is in communication connection with the scanning device through a bluetooth protocol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922346073.7U CN210927183U (en) | 2019-12-24 | 2019-12-24 | Battery overcharge protection management circuit and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922346073.7U CN210927183U (en) | 2019-12-24 | 2019-12-24 | Battery overcharge protection management circuit and system |
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| CN210927183U true CN210927183U (en) | 2020-07-03 |
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| CN201922346073.7U Active CN210927183U (en) | 2019-12-24 | 2019-12-24 | Battery overcharge protection management circuit and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117833424A (en) * | 2024-03-06 | 2024-04-05 | 浙江动一新能源动力科技股份有限公司 | Dual protection circuit and energy storage power supply |
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2019
- 2019-12-24 CN CN201922346073.7U patent/CN210927183U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117833424A (en) * | 2024-03-06 | 2024-04-05 | 浙江动一新能源动力科技股份有限公司 | Dual protection circuit and energy storage power supply |
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