CN211830308U - Overvoltage protection system for energy storage power supply - Google Patents
Overvoltage protection system for energy storage power supply Download PDFInfo
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- CN211830308U CN211830308U CN202020737570.XU CN202020737570U CN211830308U CN 211830308 U CN211830308 U CN 211830308U CN 202020737570 U CN202020737570 U CN 202020737570U CN 211830308 U CN211830308 U CN 211830308U
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Abstract
The utility model provides an energy storage is overvoltage protection system for power. The overvoltage protection system comprises an alternating current power supply, a charging circuit, a voltage detection module and an overvoltage protection module, wherein the alternating current power supply is connected with the energy storage power supply through the charging circuit, the voltage detection module is respectively connected with the energy storage power supply and the overvoltage protection module, and the overvoltage protection module is connected with the charging circuit; the voltage detection module is used for detecting the bus voltage of the energy storage power supply; the overvoltage protection module is used for determining whether the energy storage power supply has environmental disturbance according to the bus voltage, and if so, generating a power supply protection signal; and the charging circuit is used for stopping charging the energy storage power supply when receiving the power supply protection signal. The utility model discloses an overvoltage protection system, through charging circuit open with turn-off control energy storage power's input current operation within the safety protection scope, guaranteed energy storage power's stability to the bus voltage operating range of fully considering energy storage power satisfies energy storage power security, energy storage power life improves.
Description
Technical Field
The utility model belongs to the technical field of the energy storage power protection, concretely relates to overvoltage protection system for energy storage power.
Background
The energy storage power supply has the advantages of high energy density, high power density, portability and good prospect in the application fields of electric tools, garden tools and the like.
Although the energy storage power supply has the above advantages, the parameters of the energy storage power supply are variable, and the service life of the energy storage power supply is affected by environmental disturbance when the energy storage power supply is charged in an unbalanced environment.
In order to ensure that the ac power supply can meet the requirement of stable charging of the energy storage power supply and consider the fluctuation of the ac power supply voltage under environmental disturbance, it is urgently needed to design an overvoltage protection method for the energy storage power supply.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least, provide an energy storage is overvoltage protection system for power.
The utility model provides an overvoltage protection system for energy storage power supply, the overvoltage protection system comprises an alternating current power supply, a charging circuit, a voltage detection module and an overvoltage protection module, wherein the alternating current power supply is connected with the energy storage power supply through the charging circuit, the voltage detection module is respectively connected with the energy storage power supply and the overvoltage protection module, and the overvoltage protection module is connected with the charging circuit; wherein the content of the first and second substances,
the voltage detection module is used for detecting the bus voltage of the energy storage power supply and transmitting the bus voltage to the overvoltage protection module;
the overvoltage protection module is used for determining whether the energy storage power supply has environmental disturbance according to the bus voltage, if so, generating a power supply protection signal and sending the power supply protection signal to the charging circuit;
and the charging circuit is used for stopping charging the energy storage power supply when the power supply protection signal is received.
In some optional embodiments, the detecting a bus voltage of the energy storage power supply includes:
the voltage detection module is specifically further configured to detect the bus voltage of the energy storage power supply multiple times based on a preset time interval.
In some optional embodiments, the determining whether there is an environmental disturbance in the energy storage power supply according to the bus voltage includes:
the overvoltage protection module is specifically further configured to determine whether the energy storage power supply has environmental disturbance according to a current bus voltage obtained by current detection of the energy storage power supply and a previous bus voltage obtained by previous detection.
In some optional embodiments, the determining whether there is an environmental disturbance in the energy storage power supply according to a current bus voltage obtained from a current detection of the energy storage power supply and a previous bus voltage obtained from a previous detection includes:
if uk<uaOr uk＞uaAnd | uk-uk-1|≤ΔuaThe overvoltage protection module determines that the energy storage power supply does not have the environmental disturbance and controls the alternating current power supply to pass through the charging circuitA working current charges the energy storage power supply; and the number of the first and second groups,
if uk<uaAnd | uk-uk-1|＞ΔuaThe overvoltage protection module determines that the energy storage power supply has the environmental disturbance, but the energy storage power supply can bear the environmental disturbance, and controls the alternating current power supply to charge the energy storage power supply with a second working current through the charging circuit; and the number of the first and second groups,
if uk＞uaAnd | uk-uk-1|＞ΔuaThe overvoltage protection module determines that the energy storage power supply has the environmental disturbance and cannot bear the environmental disturbance, and controls the alternating current power supply to stop charging the energy storage power supply;
wherein u iskIs the current secondary bus voltage u of the energy storage power supplyaIs the threshold bus voltage, u, of the energy storage power supplyk-1Is the previous bus voltage, Deltau, of the energy storage power supplyaAnd changing the threshold value for the bus voltage of the energy storage power supply.
In some optional embodiments, the voltage detection module employs one of a multimeter, an analog electronic voltmeter, and a digital electronic voltmeter.
In some optional embodiments, the overvoltage protection module employs one of a PLC controller, a central processing unit, and a microcontroller.
In some optional embodiments, the overvoltage protection module further comprises an alarm module, and the alarm module is connected with the overvoltage protection module to output an alarm when the environment disturbance is received.
In some optional embodiments, the alarm module employs an acoustic alarm or an optical alarm.
In some optional embodiments, the charging circuit further includes a display module, and the display module is respectively connected to the voltage detection module, the overvoltage protection module, and the charging circuit to display the operating state of each module.
In some optional embodiments, the display module employs an OLED display or an LCD display.
The utility model discloses an overvoltage protection system, its input current operation that opens and turn-off control energy storage power supply through charging circuit has guaranteed energy storage power supply's stability within the safety protection scope to the bus voltage operating range of fully considering energy storage power supply satisfies energy storage power supply security, and energy storage power supply life improves, is applicable to the application scenario that energy storage power supply charges under the non-steady environment. In addition, the charging circuit gives consideration to the bus voltage operation range of the energy storage power supply, effectively protects the energy storage power supply and prolongs the service life of the energy storage power supply.
Drawings
Fig. 1 is a schematic structural diagram of an overvoltage protection system for an energy storage power supply according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an overvoltage protection system for an energy storage power supply according to another embodiment of the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Next, an overvoltage protection system for an energy storage power supply according to an embodiment of the present invention will be described with reference to fig. 1.
As shown in fig. 1, an overvoltage protection system 100 for a storage power supply includes an ac power supply 110, a charging circuit 120, a voltage detection module 130, and an overvoltage protection module 140. The ac power source 110 is connected to the energy storage power source 200 through the charging circuit 120. The voltage detection module 130 is connected to the energy storage power supply 200 and the overvoltage protection module 140, and the overvoltage protection module 140 is connected to the charging circuit 120.
For example, the ac power supply 110 may adopt a 12KVA ac power supply, a 15KVA ac power supply, a 20KVA ac power supply, a 30KVA ac power supply, a 50KVA ac power supply, a 100KVA ac power supply, a 150KVA ac power supply, a 200KAV ac power supply, a programmable three-phase ac power supply, and the like, which may be determined according to actual needs, and the present embodiment is not limited thereto. The charging circuit 120 may adopt a PT6102 charging circuit, but the embodiment is not limited thereto.
For example, the voltage detection module 130 may measure the bus voltage of the energy storage power supply 200 by using a detection method, a sampling method, a thermoelectric method, a bolometric method, a compensation method, and the like, for example, when the bus voltage is measured by using the detection method, the detection function of the tube and the transistor may be used to convert an ac voltage into a dc voltage for measurement. Alternatively, the voltage detection module 130 may also directly adopt a multimeter or the like, and the embodiment is not limited thereto.
Specifically, the voltage detection module 130 is configured to detect a bus voltage of the energy storage power supply and transmit the bus voltage to the overvoltage protection module 140. The overvoltage protection module 140 is configured to determine whether the energy storage power supply 200 has the environmental disturbance 150 according to the bus voltage, generate a power protection signal if the environmental disturbance 150 exists, and send the power protection signal to the charging circuit 120. The charging circuit 120 is configured to stop charging the energy storage power supply 200 when receiving the power protection signal.
The overvoltage protection system of this embodiment, its input current operation that opens and shuts off control energy storage power supply through charging circuit has guaranteed energy storage power supply's stability within the safety protection scope to the busbar voltage operating range of fully considering energy storage power supply satisfies energy storage power supply security, and energy storage power supply life improves, is applicable to the application occasion that energy storage power supply charges under the non-steady environment. In addition, the charging circuit gives consideration to the bus voltage operation range of the energy storage power supply, effectively protects the energy storage power supply and prolongs the service life of the energy storage power supply.
In some optional embodiments, the detecting a bus voltage of the energy storage power supply includes:
the voltage detection module 130 is further configured to detect the bus voltage of the energy storage power supply 200 multiple times based on a preset time interval. For example, the voltage detection module 130 may detect the bus voltage of the energy storage power supply 200 once at time intervals of 5s, 10s, 1min, and the like, and besides, a person skilled in the art may design some other detection time intervals according to actual needs, which is not limited in this embodiment.
Specifically, the overvoltage protection module 140 is further configured to determine whether there is an environmental disturbance in the energy storage power supply according to a current bus voltage obtained by a current detection of the energy storage power supply 200 and a previous bus voltage obtained by a previous detection.
Exemplary, if uk<uaOr uk＞uaAnd | uk-uk-1|≤ΔuaThe overvoltage protection module 140 determines that the energy storage power supply 200 does not have the environmental disturbance 150, and controls the ac power supply 110 to charge the energy storage power supply 200 with a first operating current through the charging circuit 120. As yet another example, if uk<uaAnd | uk-uk-1|＞ΔuaThe overvoltage protection module 140 determines that the environmental disturbance 150 exists in the energy storage power supply 200, but the energy storage power supply 200 can bear the environmental disturbance, and controls the ac power supply 110 to charge the energy storage power supply 200 with a second operating current through the charging circuit 120. As another example, if uk＞uaAnd | uk-uk-1|＞ΔuaThe overvoltage protection module 140 determines that the energy storage power supply 200 has the environmental disturbance 150, and the energy storage power supply 200 cannot bear the environmental disturbance, and controls the ac power supply 110 to stop charging the energy storage power supply 200. Wherein u iskIs the current secondary bus voltage u of the energy storage power supplyaIs the threshold bus voltage, u, of the energy storage power supplyk-1Is the previous bus voltage, Deltau, of the energy storage power supplyaFor the bus voltage variation threshold of the energy storage power supply uaAnd Δ uaCan be determined according to the material and electrochemical performance of the energy storage power supply.
More specifically, when the bus voltage of the energy storage power supply 200 is within the proper voltage range, the overvoltage protection module 140 outputs a signal 1, and the ac power supply 110 charges the energy storage power supply 200 through the charging circuit 120. When the bus voltage of the energy storage power supply 200 is not within the proper voltage range, the output signal of the overvoltage protection module 140 is 0, the charging circuit 120 is turned off, the alternating current power supply 110 stops charging the energy storage power supply 200, the safety requirement of the energy storage power supply 200 is met, the service life of the energy storage power supply 200 is prolonged, and the application prospect is good on occasions where the energy storage power supply is charged in a non-stable environment.
The utility model discloses an overvoltage protection system adopts overvoltage protection control energy storage power to charge to the busbar voltage value of fully considering energy storage power satisfies energy storage power's security requirement, and energy storage power life improves, is applicable to the application scenario that energy storage power charged under the non-steady environment.
For example, the voltage detection module 130 may adopt one of a multimeter, an analog electronic voltmeter and a digital electronic voltmeter. Of course, besides, those skilled in the art may select other voltage detection devices according to actual needs, and the embodiment is not limited thereto.
Illustratively, the overvoltage protection module 140 employs one of a PLC controller, a Central Processing Unit (CPU), and a Microcontroller (MCU). Of course, besides, the overvoltage protection module 140 may also adopt other devices, for example, a single comparator may be adopted, or a comparator may be integrated on a central processing unit, and the present embodiment is not limited thereto.
Illustratively, as shown in fig. 2, the overvoltage protection system 100 further includes an alarm module 160, and the alarm module 160 is connected to the overvoltage protection module 140 to output an alarm when receiving the presence of the environmental disturbance. As an example, the alarm module 160 may employ an acoustic alarm, an optical alarm, or the like, which is not limited by the embodiment.
Illustratively, as shown in fig. 2, the overvoltage protection system 100 further includes a display module 170, and the display module 170 is respectively connected to the voltage detection module 130, the overvoltage protection module 140, and the charging circuit 120 to display the operating states of the modules. As an example, the display module 170 may adopt an OLED display or an LCD display, and besides, a person skilled in the art may select other devices having a display function according to actual needs, which is not limited in this embodiment. The display module 170 may display the bus voltage detected by the voltage detection module 130, and the display module 170 may also display the determination result of the overvoltage protection module 140, such as environmental interference and power protection signals, and the display module 170 may also display the operating state of the charging circuit and the charging current, etc.
It is to be understood that the above embodiments are merely exemplary embodiments that have been employed to illustrate the principles of the present invention, and that the present invention is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (10)
1. The overvoltage protection system for the energy storage power supply is characterized by comprising an alternating current power supply, a charging circuit, a voltage detection module and an overvoltage protection module, wherein the alternating current power supply is connected with the energy storage power supply through the charging circuit; wherein the content of the first and second substances,
the voltage detection module is used for detecting the bus voltage of the energy storage power supply and transmitting the bus voltage to the overvoltage protection module;
the overvoltage protection module is used for determining whether the energy storage power supply has environmental disturbance according to the bus voltage, if so, generating a power supply protection signal and sending the power supply protection signal to the charging circuit;
and the charging circuit is used for stopping charging the energy storage power supply when the power supply protection signal is received.
2. The overvoltage protection system of claim 1, wherein the detecting a bus voltage of the energy storage power supply comprises:
the voltage detection module is specifically further configured to detect the bus voltage of the energy storage power supply multiple times based on a preset time interval.
3. The overvoltage protection system of claim 2, wherein said determining whether the energy storage power source has an environmental disturbance based on the bus voltage comprises:
the overvoltage protection module is specifically further configured to determine whether the energy storage power supply has environmental disturbance according to a current bus voltage obtained by current detection of the energy storage power supply and a previous bus voltage obtained by previous detection.
4. The overvoltage protection system of claim 3, wherein determining whether the energy storage power source has an environmental disturbance based on a current bus voltage obtained from a current test and a previous bus voltage obtained from a previous test of the energy storage power source comprises:
if uk＜uaOr uk＞uaAnd | uk-uk-1|≤ΔuaThe overvoltage protection module determines that the energy storage power supply does not have the environmental disturbance and controls the alternating current power supply to charge the energy storage power supply through the charging circuit by using a first working current; and the number of the first and second groups,
if uk＜uaAnd | uk-uk-1|＞ΔuaThe overvoltage protection module determines that the energy storage power supply has the environmental disturbance, but the energy storage power supply can bear the environmental disturbance, and controls the alternating current power supply to charge the energy storage power supply with a second working current through the charging circuit; and the number of the first and second groups,
if uk＞uaAnd | uk-uk-1|＞ΔuaThe overvoltage protection module determines that the energy storage power supply has the environmental disturbance and cannot bear the environmental disturbance, and controls the alternating current power supply to stop charging the energy storage power supply;
wherein u iskIs the current secondary bus voltage u of the energy storage power supplyaIs the threshold bus voltage, u, of the energy storage power supplyk-1Is the previous bus voltage, Deltau, of the energy storage power supplyaAnd changing the threshold value for the bus voltage of the energy storage power supply.
5. The overvoltage protection system of any one of claims 1 to 4, wherein the voltage detection module employs one of a multimeter, an analog electronic voltmeter, and a digital electronic voltmeter.
6. The overvoltage protection system of any one of claims 1 to 4, wherein the overvoltage protection module employs one of a PLC controller, a central processing unit, and a microcontroller.
7. The overvoltage protection system according to any one of claims 1 to 4, further comprising an alarm module coupled to the overvoltage protection module to output an alarm upon receiving the presence of the environmental disturbance.
8. The overvoltage protection system of claim 7, wherein the alarm module employs an audible alarm or an optical alarm.
9. The overvoltage protection system according to any one of claims 1 to 4, further comprising a display module, wherein the display module is respectively connected to the voltage detection module, the overvoltage protection module and the charging circuit to display the operating status of each module.
10. The overvoltage protection system of claim 9, wherein the display module employs an OLED display or an LCD display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202020737570.XU CN211830308U (en) | 2020-05-08 | 2020-05-08 | Overvoltage protection system for energy storage power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020737570.XU CN211830308U (en) | 2020-05-08 | 2020-05-08 | Overvoltage protection system for energy storage power supply |
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| CN211830308U true CN211830308U (en) | 2020-10-30 |
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| CN202020737570.XU Active CN211830308U (en) | 2020-05-08 | 2020-05-08 | Overvoltage protection system for energy storage power supply |
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