CN220401453U - Over-discharge charging awakening circuit of battery system - Google Patents
Over-discharge charging awakening circuit of battery system Download PDFInfo
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- CN220401453U CN220401453U CN202321639846.0U CN202321639846U CN220401453U CN 220401453 U CN220401453 U CN 220401453U CN 202321639846 U CN202321639846 U CN 202321639846U CN 220401453 U CN220401453 U CN 220401453U
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- 230000009286 beneficial effect Effects 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The application discloses battery system is put and is charged wake-up circuit, this circuit mainly includes: the power supply input unit loop, the switching power supply U and the MCU control unit, the power supply input unit loop comprises a relay unit L1, a relay unit L2, a diode D1 and a diode D2. The MCU control unit controls the relay unit L1 and the relay unit L2 to be opened or closed through an electric signal, and the switching power supply U is used for supplying power to the MCU control unit. The power supply of the switching power supply U is completely disconnected when the battery is excessively discharged, the whole control system can only start up to work through a charging mode of the charger, when the electric quantity of the battery returns to be normal, the awakened battery can supply power to the switching power supply U again, so that the system returns to be normal, the problem that the battery is continuously excessively discharged and damaged due to static power consumption existing in the switching power supply U when the battery is excessively discharged is avoided, and the problem that the battery is excessively discharged and is awakened by charging of an external device is solved.
Description
Technical Field
The utility model relates to the technical field of high-voltage battery systems, in particular to a battery system over-discharge charging awakening circuit.
Background
In a high-voltage system, the battery system has a severe requirement on the charge and discharge voltage, the charge voltage cannot be too high, the discharge voltage cannot be too low, and the like, otherwise, the battery is permanently damaged, so that the battery system is required to keep the battery voltage within a specified voltage range in the charging process. However, the battery still needs to have low static power consumption in the battery system, and if the static power consumption is too large and exists all the time, the battery system is damaged by overdischarge, so that the battery system cannot be awakened again to charge the battery pack. In the prior art, as the magnetic latching relay which can directly withstand high voltage by hundreds of V or even thousands of V does not exist in the market to switch the power supply loop or PMOS to be used as a switch and other elements, the effect of reducing the system consumption and the cost of the battery system can not be directly realized when the design of the battery system is awakened.
Disclosure of Invention
To the defect of above-mentioned prior art, this application provides a battery system over-discharge charge awakening circuit, and this circuit can prevent to make battery system continue to cross to put and damage because of the switching power supply module has static consumption when the battery is put excessively in high voltage system, has reduced the consumable to reduce battery system cost, improved production quality.
To achieve the above object, the present application provides a battery system over-discharge charging wake-up circuit, including: the power supply input unit loop, the switching power supply U and the MCU control unit, the power supply input unit loop comprises a relay unit L1, a relay unit L2, a diode D1 and a diode D2.
One end of the relay unit L1 is connected with the cathode of the diode D1, the anode of the diode D1 is connected with the dc positive electrode b+, and the other end of the relay unit L1 is connected with the cathode of the diode D2 and is commonly input to the switching power supply U.
In the present application, the relay unit L1 is used as an analog switch in a circuit, and when the circuit is overdischarged, the current flow of the circuit is controlled by controlling the closing and opening of the relay.
One end of the relay unit L2 is connected with the anode of the diode D2 and is commonly connected with the positive electrode P+ of the power supply, and the other end of the relay unit L2 is connected with the direct current positive electrode B+.
In the present application, the relay unit L2 is also used as an analog switch. When the circuit is over-discharged, the battery system is shut down, and the relay unit L2 is opened.
And the switching power supply U is connected with the MCU control unit to supply power for the MCU control unit.
In the present application, the MCU control unit controls the relay unit L1 and the relay unit L2 through electric signals.
Further, the relay unit L1 is composed of an electromagnetic relay L3, a magnetic latching relay L4, and a magnetic latching relay L5.
The cathode of the diode D1 is connected to one end of the electromagnetic relay L3 and one end of the magnetic latching relay L4, the other end of the magnetic latching relay L4 is connected to the other end of the magnetic latching relay L5, and the other end of the magnetic latching relay L5 is connected to the other end of the electromagnetic relay L3 and the cathode of the diode D2.
In this application, magnetic latching relay L4 and magnetic latching relay L5 establish ties, and when electromagnetic relay L3 closed, magnetic latching relay L4 and magnetic latching relay L5 can automatic disconnection, and B+ power supply return circuit is cut off, and only when charging, P+ is to switching power supply, and battery system can only work.
Further, the relay unit L2 is composed of a total positive relay L6, a pre-charging relay L7, and a pre-charging resistor R1.
One end of the pre-charging resistor R1 is connected with one end of the pre-charging relay L7, the other end of the pre-charging relay L7 is respectively connected with one end of the total positive relay L6 and the direct current positive electrode B+, and the other end of the total positive relay L6 is respectively connected with the power supply positive electrode P+ and the other end of the pre-charging resistor R1; the other end of the precharge resistor R1 is connected with the anode of the diode D2.
In the application, when a high-voltage system is charged, the total positive relay L6 and the pre-charging relay L7 are closed, high-voltage pre-charging is performed in a circuit, the high-voltage charging is performed only after the high-voltage pre-charging is successful, and meanwhile, the pre-charging relay L7 is opened; when the circuit is over-discharged, the total positive relay L6 is disconnected, and the protection circuit is realized.
Further, the diode D2 may be disposed between the switching power supply U and the power supply positive electrode p+.
In this application, when the system is operating normally, and is not charging either, the current in the circuit flows from the direct current positive electrode b+ to the diode D1, the magnetic latching relay L4 and the magnetic latching relay L5 in order, and finally to the switching power supply U.
When the battery system is over-discharged, the MCU control unit controls the electromagnetic relay L3 to be closed, controls the magnetic latching relay L4 and the magnetic latching relay L5 to be disconnected, and then controls the electromagnetic relay L3 to be disconnected so as to cut off a direct-current power supply B+ power supply loop; and the switching power supply U supplies power to the battery system until the electric quantity of the battery returns to normal, and wakes up the battery system to work normally again.
In the application, after the battery system is shut down due to overdischarge, the system is charged through the positive electrode P+ of the power supply, and at the moment, the switching power supply U supplies power to wake up the battery system, so that the battery system can restart working, and current in the circuit flows from the positive electrode P+ of the power supply to the diode D2 and then flows to the switching power supply U.
In this application, electromagnetic relay L8 may be further disposed between switching power supply U and power supply positive electrode p+, one end of electromagnetic relay L8 is connected to the cathode of diode D2, and the other end of electromagnetic relay L8 is connected to switching power supply U.
The cathode of the diode D2 is also connected with one end of the magnetic latching relay L4;
and another connecting circuit is additionally arranged between the magnetic latching relay L4 and the magnetic latching relay L5, and the cathode of the diode D2 is sequentially connected with the magnetic latching relay L4 and the magnetic latching relay L5 by closing the magnetic latching relay L4 and the magnetic latching relay L5 and then is connected with the switching power supply U.
In this application, when the battery system is over-discharged, the MCU control unit controls electromagnetic relay L3 to be closed, and controls magnetism keep relay L4 with magnetism keep relay L5 to be closed, and then control electromagnetic relay L3 with electromagnetic relay L8 disconnection, when switching power supply U is right the battery system power supply is up to the battery electric quantity is replied normally, awakes the battery system is normal work again.
Compared with the prior art, the application has the beneficial effects that:
1. the over-discharge charging awakening circuit of the battery system provided by the utility model has the advantages that the diode D1, the diode D2, the electromagnetic relay L3, the magnetic latching relay L4 and the magnetic latching relay L5 are added in the circuit, so that the battery system is prevented from being damaged due to over-discharge possibly caused by the static power consumption of the switching power supply U and the battery system;
2. the over-discharge charging awakening circuit of the battery system provided by the utility model has the advantages that the diode D1, the diode D2, the electromagnetic relay L3, the magnetic latching relay L4, the magnetic latching relay L5 and the electromagnetic relay L8 are added in the circuit, so that the battery system is prevented from being damaged due to over-discharge caused by the static power consumption of the switching power supply U and the battery system;
3. when the MCU control unit detects that the battery system is overdischarged, the magnetic latching relay L3 is controlled to be closed, the magnetic latching relay L4 and the magnetic latching relay L5 are automatically disconnected, and then the electromagnetic relay L3 is disconnected, and the power supply loop of the direct current positive electrode B+ and the switching power supply U is disconnected, so that the damage caused by overdischarge of the battery system due to static power consumption of the switching power supply U and the battery system is avoided;
4. when the MCU control unit detects that the battery system is overdischarged, the battery system overdischarged charge awakening circuit provided by the utility model can automatically close the magnetic latching relay L4 and the magnetic latching relay L5 by controlling the electromagnetic relay L3 to be closed firstly, and then disconnect the electromagnetic relay L3 and the electromagnetic relay L8, so that the power supply loop of the direct current positive pole B+ and the switching power supply U is cut off, and the damage caused by overdischarge of the battery system possibly due to the static power consumption of the switching power supply U and the battery system is avoided;
5. the over-discharge charging awakening circuit of the battery system can utilize an external charging device to charge and awaken the battery system after the power supply loop of the switch power supply U and the battery system is cut off.
Drawings
Fig. 1 is a schematic circuit diagram of a wake-up circuit for over-discharge charging of a battery system according to the present utility model.
Fig. 2 is a schematic circuit diagram of another battery system over-discharge charging wake-up circuit according to the present utility model.
Detailed Description
For the purposes, technical solutions and advantages of the embodiments of the present application to be more apparent, the technical solutions will be clearly and completely described below in connection with the embodiments of the present application. It will be apparent that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
Embodiment one:
as shown in fig. 1, the present utility model provides a battery system over-discharge charging wake-up circuit, comprising: the power supply input unit loop, the switching power supply U and the MCU control unit, the power supply input unit loop comprises a relay unit L1, a relay unit L2, a diode D1 and a diode D2.
One end of the relay unit L1 is connected with the cathode of the diode D1, the anode of the diode D1 is connected with the dc positive electrode b+, and the other end of the relay unit L1 is connected with the cathode of the diode D2 and is commonly input to the switching power supply U.
In the present application, the relay unit L1 is used as an analog switch in a circuit, and when the circuit is overdischarged, the current flow of the circuit is controlled by controlling the closing and opening of the relay.
One end of the relay unit L2 is connected with the anode of the diode D2 and is commonly connected with the positive electrode P+ of the power supply, and the other end of the relay unit L2 is connected with the direct current positive electrode B+.
In the present application, the relay unit L2 is also used as an analog switch. When the circuit is over-discharged, the battery system is shut down, and the relay unit L2 is opened.
And the switching power supply U is connected with the MCU control unit to supply power for the MCU control unit.
In the present application, the MCU control unit controls the relay unit L1 and the relay unit L2 through electric signals.
Further, the relay unit L1 is composed of an electromagnetic relay L3, a magnetic latching relay L4, and a magnetic latching relay L5.
The cathode of the diode D1 is connected to one end of the electromagnetic relay L3 and one end of the magnetic latching relay L4, the other end of the magnetic latching relay L4 is connected to the other end of the magnetic latching relay L5, and the other end of the magnetic latching relay L5 is connected to the other end of the electromagnetic relay L3 and the cathode of the diode D2.
In this application, magnetic latching relay L4 and magnetic latching relay L5 establish ties, and when electromagnetic relay L3 closed, magnetic latching relay L4 and magnetic latching relay L5 can automatic disconnection, and B+ power supply return circuit is cut off, and only when charging, P+ is to switching power supply, and battery system can only work.
Further, the relay unit L2 is composed of a total positive relay L6, a pre-charging relay L7, and a pre-charging resistor R1.
One end of the pre-charging resistor R1 is connected with one end of the pre-charging relay L7, the other end of the pre-charging relay L7 is respectively connected with one end of the total positive relay L6 and the direct current positive electrode B+, and the other end of the total positive relay L6 is respectively connected with the power supply positive electrode P+ and the other end of the pre-charging resistor R1; the other end of the precharge resistor R1 is connected with the anode of the diode D2.
In the application, when a high-voltage system is charged, the total positive relay L6 and the pre-charging relay L7 are closed, high-voltage pre-charging is performed in a circuit, the high-voltage charging is performed only after the high-voltage pre-charging is successful, and meanwhile, the pre-charging relay L7 is opened; when the circuit is over-discharged, the total positive relay L6 is disconnected, and the protection circuit is realized.
As shown in fig. 1, further, the diode D2 may be disposed between the switching power supply U and the power supply positive electrode p+.
Specifically, the working principle and the working process of the over-discharge charging awakening circuit of the battery system provided by the utility model are described as follows:
when the battery system works normally and is not charged, current in the circuit flows from the direct current positive electrode B+ to the diode D1, the magnetic latching relay L4 and the magnetic latching relay L5 in sequence, and finally flows to the switching power supply U.
When the battery system is over-discharged, the MCU control unit controls the electromagnetic relay L3 to be closed, controls the magnetic latching relay L4 and the magnetic latching relay L5 to be disconnected, and then controls the electromagnetic relay L3 to be disconnected so as to cut off a direct-current power supply B+ power supply loop; and the switching power supply U supplies power to the battery system until the electric quantity of the battery returns to normal, and wakes up the battery system to work normally again.
After the battery system is shut down due to overdischarge, the system is charged through the positive electrode P+ of the power supply, at the moment, the switching power supply U supplies power to wake up the battery system, so that the battery system can restart working, and current in the circuit flows from the positive electrode P+ of the power supply to the diode D2 and then flows to the switching power supply U.
In summary, the diode D1, the diode D2, the electromagnetic relay L3, the magnetic latching relay L4 and the magnetic latching relay L5 are added in the circuit, so that the damage to the battery system caused by overdischarge due to the static power consumption of the switching power supply U and the battery system is avoided, and the battery system can be charged and awakened by an external charging device after the power supply loops of the switching power supply U and the battery system are cut off, so that the service life of the battery pack is prolonged without being subjected to the static power consumption of the switching power supply U and the battery system.
Embodiment two:
as shown in fig. 2, the present utility model provides another battery system over-discharge charging wake-up circuit, which includes:
an electromagnetic relay L8 can be arranged between the switching power supply U and the positive electrode P+ of the power supply, one end of the electromagnetic relay L8 is connected with the cathode of the diode D2, and the other end of the electromagnetic relay L8 is connected with the switching power supply U.
The cathode of the diode D2 is also connected with one end of the magnetic latching relay L4;
and another connecting circuit is additionally arranged between the magnetic latching relay L4 and the magnetic latching relay L5, and the cathode of the diode D2 is sequentially connected with the magnetic latching relay L4 and the magnetic latching relay L5 by closing the magnetic latching relay L4 and the magnetic latching relay L5 and then is connected with the switching power supply U.
In this application, when the battery system is over-discharged, the MCU control unit controls electromagnetic relay L3 to be closed, and controls magnetism keep relay L4 with magnetism keep relay L5 to be closed, and then control electromagnetic relay L3 with electromagnetic relay L8 disconnection, when switching power supply U is right the battery system power supply is up to the battery electric quantity is replied normally, awakes the battery system is normal work again.
As shown in fig. 2, the operation principle and the process of another over-discharge charging wake-up circuit of a battery system provided by the utility model are described as follows:
when the circuit works normally, the direct current positive electrode B+ supplies power to the switching power supply U, the magnetic latching relay L4 and the magnetic latching relay L5 are both closed and are conducted with the direct current positive electrode B+, and current in the circuit flows from the direct current positive electrode B+ to the diode D1, the magnetic latching relay L4 and the magnetic latching relay L5 in sequence and finally flows to the switching power supply U.
When the battery system is over-discharged, the electromagnetic relay L3 is closed, the electromagnetic relay L6 is disconnected, the magnetic latching relay L4 and the magnetic latching relay L5 are both closed and are connected with the positive pole P+ of the power supply, meanwhile, the connection with the direct current positive pole B+ is disconnected, then the electromagnetic relay L3 is disconnected, the positive pole P+ of the power supply supplies power to the switching power supply U, and at the moment, current in the circuit sequentially flows from the positive pole P+ of the power supply to the magnetic latching relay L4 and the magnetic latching relay L5 and then flows to the switching power supply U.
After the battery system is shut down due to overdischarge, the system is charged through the positive electrode P+ of the power supply, at the moment, the switching power supply U supplies power to wake up the battery system, so that the battery system can restart working, and current in the circuit flows from the positive electrode P+ of the power supply to the diode D2 and then flows to the switching power supply U. Since the dc positive electrode b+ and the power supply positive electrode p+ are both present at this time, the magnetic latching relays L4 and L5 cannot be directly operated, and the diodes D1 and D2 prevent the direct connection of b+ and p+.
In summary, the diode D1, the diode D2, the electromagnetic relay L3, the magnetic latching relay L4, the magnetic latching relay L5 and the electromagnetic relay L8 are additionally arranged in the circuit, so that the damage to the battery system caused by overdischarge due to the static power consumption of the switching power supply U and the battery system is avoided, the battery system can be charged and awakened by using an external charging device after the power supply loops of the switching power supply U and the battery system are cut off, the service life of the battery pack is prolonged due to the static power consumption of the switching power supply U and the battery system, and the cost of the battery system is greatly reduced.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solution of the present utility model, and not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that the technical solutions described in the foregoing embodiments may be modified or some of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (9)
1. A battery system over-discharge charge wake-up circuit, comprising:
the power supply input unit loop comprises a relay unit L1, a relay unit L2, a diode D1 and a diode D2;
one end of the relay unit L1 is connected with the cathode of the diode D1, the anode of the diode D1 is connected with the direct current positive electrode B+, and the other end of the relay unit L1 is connected with the cathode of the diode D2 and is commonly input to the switching power supply U;
one end of the relay unit L2 is connected with the anode of the diode D2 and is connected with the positive electrode P+ of the power supply together, and the other end of the relay unit L2 is connected with the direct current positive electrode B+;
and the switching power supply U is connected with the MCU control unit and supplies power for the MCU control unit.
2. A battery system over-discharge charge wakeup circuit according to claim 1, wherein,
the relay unit L1 is composed of an electromagnetic relay L3, a magnetic latching relay L4, and a magnetic latching relay L5.
3. A battery system over-discharge charge wakeup circuit according to claim 2, wherein,
the cathode of the diode D1 is connected with one end of the electromagnetic relay L3 and one end of the magnetic latching relay L4 respectively, the other end of the magnetic latching relay L4 is connected with the other end of the magnetic latching relay L5, and the other end of the magnetic latching relay L5 is connected with the other end of the electromagnetic relay L3 and the cathode of the diode D2 respectively.
4. A battery system over-discharge charge wakeup circuit according to claim 3, wherein,
the relay unit L2 is composed of a total positive relay L6, a pre-charging relay L7 and a pre-charging resistor R1.
5. A battery system over-discharge charge wakeup circuit according to claim 4, wherein,
one end of the pre-charging resistor R1 is connected with one end of the pre-charging relay L7, the other end of the pre-charging relay L7 is respectively connected with one end of the total positive relay L6 and the direct current positive electrode B+, and the other end of the total positive relay L6 is respectively connected with the power supply positive electrode P+ and the other end of the pre-charging resistor R1; the other end of the precharge resistor R1 is connected to the anode of the diode D2.
6. A battery system over-discharge charge wakeup circuit according to claim 5, wherein,
the diode D2 may be disposed between the switching power supply U and the power supply positive electrode p+.
7. The battery system over-discharge charge wakeup circuit of claim 6, wherein,
when the battery system is over-discharged, the MCU control unit controls the electromagnetic relay L3 to be closed, controls the magnetic latching relay L4 and the magnetic latching relay L5 to be disconnected, and then controls the electromagnetic relay L3 to be disconnected so as to cut off a direct-current power supply B+ power supply loop;
and the switching power supply U supplies power to the battery system until the electric quantity of the battery returns to normal, and wakes up the battery system to work normally again.
8. The battery system over-discharge charge wakeup circuit of claim 7, wherein,
an electromagnetic relay L8 can be additionally arranged between the switching power supply U and the positive electrode P+ of the power supply, one end of the electromagnetic relay L8 is connected with the cathode of the diode D2, and the other end of the electromagnetic relay L8 is connected with the switching power supply U;
the cathode of the diode D2 is also connected with one end of the magnetic latching relay L4;
and another connecting circuit is additionally arranged between the magnetic latching relay L4 and the magnetic latching relay L5, and the cathode of the diode D2 is sequentially connected with the magnetic latching relay L4 and the magnetic latching relay L5 by closing the magnetic latching relay L4 and the magnetic latching relay L5 and then is connected with the switching power supply U.
9. The battery system over-discharge charge wakeup circuit of claim 8, wherein,
when the battery system is over-discharged, the MCU control unit controls the electromagnetic relay L3 to be closed, controls the magnetic latching relay L4 and the magnetic latching relay L5 to be closed, and then controls the electromagnetic relay L3 and the electromagnetic relay L8 to be disconnected, and when the switching power supply U supplies power to the battery system until the electric quantity of the battery returns to normal, the battery system is awakened to work normally again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321639846.0U CN220401453U (en) | 2023-06-27 | 2023-06-27 | Over-discharge charging awakening circuit of battery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321639846.0U CN220401453U (en) | 2023-06-27 | 2023-06-27 | Over-discharge charging awakening circuit of battery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220401453U true CN220401453U (en) | 2024-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321639846.0U Active CN220401453U (en) | 2023-06-27 | 2023-06-27 | Over-discharge charging awakening circuit of battery system |
Country Status (1)
| Country | Link |
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| CN (1) | CN220401453U (en) |
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2023
- 2023-06-27 CN CN202321639846.0U patent/CN220401453U/en active Active
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