CN213521280U - Storage battery protection circuit - Google Patents
Storage battery protection circuit Download PDFInfo
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- CN213521280U CN213521280U CN202022455775.1U CN202022455775U CN213521280U CN 213521280 U CN213521280 U CN 213521280U CN 202022455775 U CN202022455775 U CN 202022455775U CN 213521280 U CN213521280 U CN 213521280U
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- storage battery
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- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010891 electric arc Methods 0.000 description 2
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Abstract
The embodiment of the application provides a battery protection circuit, includes: the electronic switch is used for disconnecting or conducting the connection between the charger and the storage battery, so that the condition that contacts are pulled out of an arc and the condition that switching-off fails possibly occur when a relay is used for controlling can be avoided, and the reliability of a storage battery protection circuit is improved.
Description
Technical Field
The application relates to the technical field of rail transit, and relates to but is not limited to a storage battery protection circuit.
Background
In the field of rail transit, a charger is generally used for charging a storage battery, and a mechanical switch (such as a conventional relay) is used between the charger and the storage battery to realize the breaking between the charger and the storage battery. For example, when fault conditions such as over-temperature, over-voltage, over-current and the like occur inside the storage Battery, the conventional relay receives a signal of a Battery Management System (BMS) and drives a mechanical switch to realize the disconnection between the storage Battery and a charging circuit of a charger.
The conventional relay controls the on-off of the large current of the charging circuit of the charger by receiving the small current input of the BMS, plays a role of safety protection in the circuit, needs to cut off the charging circuit of the storage battery in time when abnormal working conditions such as temperature exceeding an alarm value, overvoltage and overcurrent occur inside the storage battery, and can recover the connection in time to perform normal charging after the internal part of the storage battery recovers to be normal. However, the on-load breaking capacity of the relay is very weak, the arc discharge of a contact is easily caused when the relay acts under the working condition of high current, the service life and the reliability of the relay are influenced, the risk of opening failure of the relay exists under the working conditions of overcurrent, on-load disconnection and the like, and great potential safety hazards exist. If a direct current contactor is used, the breaking capacity of the direct current contactor can meet the system requirement, but the direct current contactor has the defects of large volume, high cost and the like.
Disclosure of Invention
To address the above issues, the present application provides a battery protection circuit.
The application provides a battery protection circuit, includes: the charging device comprises a charging machine, a storage battery and an electronic switch, wherein the electronic switch is connected between the charging machine and the storage battery, and the electronic switch is used for disconnecting or conducting the electric connection between the charging machine and the storage battery.
In some embodiments, the battery protection circuit further comprises:
and the battery management module is connected with the storage battery, the electronic switch and the storage battery and is used for generating a control signal according to the state information of the storage battery so that the electronic switch can disconnect or connect the charger and the storage battery according to the control signal.
In some embodiments, the electronic switch comprises: a tertiary pipe.
In some embodiments, the triode is an NPN-type triode, wherein a collector of the triode is connected to an anode of the charger, an emitter of the triode is connected to an anode of the storage battery, a cathode of the charger is connected to a cathode of the storage battery, and the battery management module is connected to a base of the triode.
In some embodiments, the battery protection circuit further comprises: and the discharge circuit is connected with the storage battery and is used for discharging the storage battery through the discharge circuit when the electronic switch disconnects the charger from the storage battery.
In some embodiments, the discharge circuit includes a diode and a load, an anode of the diode is connected to an anode of the battery, a cathode of the diode is connected to one end of the load, and another end of the load is connected to a cathode of the battery.
In some embodiments, one end of the load is connected to the positive electrode of the charger, and the other end of the load is connected to the negative electrode of the charger.
In some embodiments, the diode and the transistor are integrated in parallel.
In some embodiments, the electronic switch comprises: an IGBT module.
In some embodiments, the electronic switch comprises: an IPM module.
The application provides a pair of battery protection circuit, through set up electronic switch between machine of charging and battery and control the machine of charging and be connected between the battery, the condition that appears the contact and draw the arc and the condition that the separating brake fails that probably appears when can avoiding using relay control, has promoted battery protection circuit's reliability.
Drawings
The present application will be described in more detail below on the basis of embodiments and with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a battery protection circuit provided in the related art;
fig. 2 is a schematic structural diagram of a battery protection circuit according to an embodiment of the present application.
Detailed Description
The following detailed description will be provided with reference to the accompanying drawings and embodiments, so that how to apply the technical means to solve the technical problems and achieve the corresponding technical effects can be fully understood and implemented. The embodiments and various features in the embodiments of the present application can be combined with each other without conflict, and the formed technical solutions are all within the scope of protection of the present application.
Before introducing the embodiments of the present application, a battery protection circuit in the related art is explained first, fig. 1 is a schematic structural diagram of a battery protection circuit provided in the related art, as shown in fig. 1, in the related art, a self-protection switch (a conventional relay) and a diode are connected in parallel between a charger and a battery, when an abnormality occurs in the battery or the charger, etc., the BMS sends an instruction to the relay switch to break the brake, and the charger interrupts the charging circuit of the battery, but the battery can still supply power to a load normally through the diode loop. When the fault is removed, the self-protection switch receives the BMS instruction to recover the switch-on, and the charging circuit is ensured to be normal. However, the on-load breaking capacity of the relay is very weak, and the operation under a large-current working condition easily causes arc discharge of a contact when the relay acts, so that the service life and the reliability of the relay are influenced, and a large potential safety hazard exists.
In view of the above, the present application provides a battery protection circuit, and fig. 2 is a schematic structural diagram of a battery protection circuit provided in an embodiment of the present application, as shown in fig. 2, including: the charging device comprises a charging machine, a storage battery and an electronic switch, wherein the electronic switch is connected between the charging machine and the storage battery, and the electronic switch is used for disconnecting or conducting the connection between the charging machine and the storage battery.
In the embodiment of the application, the electronic switch may receive a control signal to perform disconnection or connection between the charger and the storage battery. The electronic switch is a contactless switch. The charger is used for charging the high-power storage battery. The battery may be a lead acid battery. When the electronic switch is switched on, the charger charges the storage battery, and when the electronic switch is switched off, the charger stops charging the storage battery.
The embodiment of the application provides a battery protection circuit, through set up electronic switch between machine of charging and battery and control the machine of charging and be connected between the battery, because electronic switch is contactless switch, the condition that the contact appears when can avoiding using relay control draws the arc and avoids the condition of the separating brake failure that probably appears, has promoted battery protection circuit's reliability.
In some embodiments, the battery protection circuit includes: the battery management module is connected with the storage battery and is used for generating a control signal according to the state information of the storage battery, wherein the electronic switch is disconnected or connected with the charger and the storage battery according to the control signal.
In this embodiment, the state information of the storage battery may include: a normal state and an abnormal state, the abnormal state may include: the temperature of the storage battery exceeds the preset temperature, and the charging voltage of the storage battery is overloaded. In this embodiment, the control signal may include a pulse signal, for example, the pulse signal is generated in a normal state, and the pulse signal is sent to the electronic switch, and the electronic switch receives the pulse information to conduct the connection between the charger and the storage battery. And when the battery management module is in an abnormal state, the battery management module generates a control signal for cutting off the pulse signal so as to stop sending the pulse signal to the electronic switch, and the electronic switch disconnects the charger and the storage battery at the moment because the electronic switch does not receive the pulse signal.
In some embodiments, the electronic switch comprises: a tertiary pipe.
In the embodiment of the application, the triode is an NPN-type triode, wherein a collector of the triode is connected with an anode of the charger, an emitter of the triode is connected with an anode of the storage battery, a cathode of the charger is connected with a cathode of the storage battery, and the battery management module is connected with a base of the triode.
In the embodiment of the application, when the base electrode of the triode receives the control signal, the positive electrode of the charger is conducted with the positive electrode of the storage battery, so that the storage battery is electrified. When the base electrode of the triode does not receive the control signal, the positive electrode of the charger is disconnected with the positive electrode of the storage battery, and the charger cannot supply power to the battery so as to protect the storage battery.
In some embodiments, the battery protection circuit includes: the battery management system comprises a charger, a storage battery, an NPN type triode, a battery management module and a discharge circuit, wherein a collector of the triode is connected with the anode of the charger, an emitter of the triode is connected with the anode of the storage battery, the cathode of the charger is connected with the cathode of the storage battery, the battery management module is connected with a base of the triode, and the battery management module is connected with the storage battery. . The discharging circuit is connected with the storage battery and used for discharging the storage battery through the discharging circuit when the triode is disconnected with the charger and the storage battery.
In some embodiments, the battery protection circuit includes: the battery management system comprises a charger, a storage battery, an NPN type triode, a battery management module, a diode and a load, wherein a collector of the triode is connected with the anode of the charger, an emitter of the triode is connected with the anode of the storage battery, the cathode of the charger is connected with the cathode of the storage battery, and the battery management module is connected with a base of the triode; the anode of the diode is connected with the anode of the storage battery, the cathode of the diode is connected with one end of the load, and the other end of the load is connected with the cathode of the storage battery.
In the embodiment of the application, when the triode is disconnected from the charger and the storage battery, the storage battery can supply power for the load.
In some embodiments, the battery protection circuit includes: the battery management system comprises a charger, a storage battery, an NPN type triode, a battery management module, a diode and a load, wherein a collector of the triode is connected with the anode of the charger, an emitter of the triode is connected with the anode of the storage battery, the cathode of the charger is connected with the cathode of the storage battery, and the battery management module is connected with a base of the triode; the anode of the diode is connected with the anode of the storage battery, the cathode of the diode is connected with one end of the load, and the other end of the load is connected with the cathode of the storage battery. One end of the load is connected with the positive electrode of the charger, and the other end of the load is connected with the negative electrode of the charger.
In the embodiment of the application, when the charger charges the storage battery, the charger simultaneously supplies power to the load. When the charger fails and cannot supply power to the load, the load can be supplied with power through the storage battery, so that the power consumption of the load can be ensured.
In some embodiments, the diode and the transistor are integrated in parallel.
In the embodiment of the application, the diode and the triode are integrated together, so that the size can be reduced.
In some embodiments, the electronic switch may also be an IGBT module or an IPM module. In the embodiment of the present application, when the electronic switch is an IGBT module or an IPM module, the volume of the IGBT module or the IPM module is also advantageous compared to the volume of the relay.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or connection between the components shown or discussed may be through some interfaces, indirect coupling or communication connection between devices or units, and may be electrical, mechanical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, all functional units in the embodiments of the present application may be integrated into one second processing unit, or each unit may be separately regarded as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application.
Claims (10)
1. A battery protection circuit, comprising: the charging device comprises a charging machine, a storage battery and an electronic switch, wherein the electronic switch is connected between the charging machine and the storage battery, and the electronic switch is used for disconnecting or conducting the electric connection between the charging machine and the storage battery.
2. The battery protection circuit of claim 1, further comprising:
and the battery management module is connected with the storage battery, the electronic switch and the storage battery and is used for generating a control signal according to the state information of the storage battery so that the electronic switch can disconnect or connect the charger and the storage battery according to the control signal.
3. The battery protection circuit of claim 2, wherein the electronic switch comprises: a tertiary pipe.
4. The battery protection circuit according to claim 3, wherein the triode is an NPN-type triode, wherein a collector of the triode is connected with an anode of the charger, an emitter of the triode is connected with an anode of the battery, a cathode of the charger is connected with a cathode of the battery, and the battery management module is connected with a base of the triode.
5. The battery protection circuit of claim 4, further comprising: and the discharge circuit is connected with the storage battery and is used for discharging the storage battery through the discharge circuit when the electronic switch disconnects the charger from the storage battery.
6. The battery protection circuit according to claim 5, wherein the discharge circuit comprises a diode and a load, wherein an anode of the diode is connected to an anode of the battery, a cathode of the diode is connected to one end of the load, and the other end of the load is connected to a cathode of the battery.
7. The battery protection circuit according to claim 6, wherein one end of the load is connected to the positive electrode of the charger, and the other end of the load is connected to the negative electrode of the charger.
8. The battery protection circuit of claim 6, wherein the diode and the transistor are integrated in parallel.
9. The battery protection circuit of claim 1, wherein the electronic switch comprises: an IGBT module.
10. The battery protection circuit of claim 1, wherein the electronic switch comprises: an IPM module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022455775.1U CN213521280U (en) | 2020-10-29 | 2020-10-29 | Storage battery protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022455775.1U CN213521280U (en) | 2020-10-29 | 2020-10-29 | Storage battery protection circuit |
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| Publication Number | Publication Date |
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| CN213521280U true CN213521280U (en) | 2021-06-22 |
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| CN202022455775.1U Active CN213521280U (en) | 2020-10-29 | 2020-10-29 | Storage battery protection circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024230064A1 (en) * | 2023-05-08 | 2024-11-14 | 中车唐山机车车辆有限公司 | Charging and discharging protection circuit for rail vehicle-mounted storage battery, and rail vehicle |
-
2020
- 2020-10-29 CN CN202022455775.1U patent/CN213521280U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024230064A1 (en) * | 2023-05-08 | 2024-11-14 | 中车唐山机车车辆有限公司 | Charging and discharging protection circuit for rail vehicle-mounted storage battery, and rail vehicle |
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