CN115754785A - Storage battery effectiveness detection device and detection method - Google Patents
Storage battery effectiveness detection device and detection method Download PDFInfo
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- CN115754785A CN115754785A CN202211347816.2A CN202211347816A CN115754785A CN 115754785 A CN115754785 A CN 115754785A CN 202211347816 A CN202211347816 A CN 202211347816A CN 115754785 A CN115754785 A CN 115754785A
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Abstract
The invention relates to a device and a method for detecting the effectiveness of a storage battery, wherein the device comprises a buck silicon chain, a direct-current contactor, two nodes and a switch, wherein the buck silicon chain is provided with at least two diodes which are connected in series; the direct current contactor is provided with a main contact and an auxiliary contact, the main contact is connected with the voltage reduction silicon chain, and the auxiliary contact is connected with the negative electrode of the direct current bus; two nodes are respectively arranged at two ends of the voltage-reducing silicon chain, wherein one node is connected with the storage battery pack, and the other node is connected with the anode of the direct-current bus; the switch is arranged between the two nodes; when the validity of the storage battery pack is verified, the switch is disconnected so that the main contact of the direct current contactor is in a disconnected state, the output voltage of a direct current bus of the charger is reduced through the voltage reduction silicon chain, and the storage battery pack bears a conventional load for a station so as to verify the conventional loading capacity of the storage battery pack. The invention can realize the on-line monitoring of the effectiveness of the storage battery pack and overcome the technical defects of low overall detection efficiency, high cost and large workload in the prior art.
Description
Technical Field
The invention relates to the technical field of storage battery detection, in particular to a storage battery effectiveness detection device and a detection method.
Background
The direct current power supply system is used as a working power supply of the power protection system, and the reliability of the direct current power supply system is related to the power supply safety and stability of the power grid system. The storage battery pack is used as core equipment of a direct current power supply system, provides a protection power supply in time when an alternating current fault occurs, and maintains the reliable operation of protective equipment of a power station and a distribution substation, so that whether the storage battery pack is reliable or not is directly related to the power utilization safety of a power system.
Because the storage battery pack is in a floating charge state for a long time on line, the performance of the storage battery pack is difficult to judge, such as capacity reduction, internal resistance increase, and even the conditions of virtual connection of battery poles and the like can not be obtained in time, once the storage battery pack is required to be put into use, the battery pack can not provide a power supply for a power protection system due to the problems, the due significance is lost, and the whole battery pack is in a deprotection state. At present, the only way for monitoring the performance of the storage battery pack is to perform a nuclear qualitative discharge test on the storage battery pack, the general period of the test is two to three years, a large number of cases prove that the conditions of virtual connection, internal resistance increase, battery failure and the like of the battery often occur during the detection period, and certain risks are brought to the system safety, and in addition, the case needs to be maintained on site by personnel, namely the nuclear qualitative discharge test of the storage battery pack has the problems of low overall efficiency, high cost, large workload and the like.
Therefore, it is urgently needed to provide a device and a method for detecting the effectiveness of a storage battery to overcome the technical defects of low overall detection efficiency, high cost and large workload in the prior art.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the technical defects of low overall detection efficiency, high cost and large workload in the prior art, and provide a storage battery validity detection device and a detection method.
In order to solve the technical problem, the invention provides a device for detecting the effectiveness of a storage battery, wherein the detection device is connected with a direct current bus of a charger, and comprises:
a buck silicon chain having at least two diodes connected in series;
the direct current contactor is provided with a main contact and an auxiliary contact, the main contact is connected with the voltage reduction silicon chain, and the auxiliary contact is connected with the negative electrode of the direct current bus;
two nodes which are respectively arranged at two ends of the voltage-reducing silicon chain, wherein one node is connected with the storage battery pack, and the other node is connected with the anode of the direct current bus;
the switch is arranged between the two nodes, and the main contact of the direct current contactor is switched between a closed state and an open state through the switch;
when the validity of the storage battery pack is verified, the switch is disconnected so that a main contact of the direct current contactor is in a disconnected state, the output voltage of a direct current bus of the charger is reduced through the voltage reduction silicon chain, and the storage battery pack is enabled to bear a conventional load for a station so as to verify the conventional loading capacity of the storage battery pack.
In one embodiment of the invention, when the storage battery pack normally operates, the switch is closed, so that the main contact of the direct current contactor is in a closed state, and the main contact of the direct current contactor is short-circuited with the voltage reduction silicon chain, so that the storage battery pack is in a floating charge state.
In one embodiment of the present invention, the conduction directions of at least two diodes connected in series in the buck silicon chain are the same.
In one embodiment of the invention, a node arranged at the positive pole of the buck silicon chain in the two nodes is connected with the storage battery pack, and a node arranged at the negative pole of the buck silicon chain is connected with the positive pole of the direct current bus.
In one embodiment of the invention, when the validity of the storage battery pack is verified, the switch is switched off, so that the main contact of the direct current contactor is in a disconnected state, the output voltage of a direct current bus of the charger is reduced through the voltage reduction silicon chain, the storage battery pack is subjected to a conventional load for a station, and the storage battery pack is subjected to a discharge test by inputting a simulation load on the basis of the conventional load for the station.
In one embodiment of the invention, after the conventional loading capacity of the storage battery pack is verified to be qualified, the impact resistance of the storage battery pack is verified on the basis of the conventional load of a storage battery pack bearing station.
In one embodiment of the invention, after the conventional loading capacity of the storage battery pack is verified to be qualified, the internal load is intelligently switched on and off on the basis that the storage battery pack bears the conventional load for a station, a plurality of circuit breakers are simulated to simultaneously protect tripping or closing action current, voltage fluctuation and voltage drop of a direct-current bus are dynamically detected, and the impact resistance of the storage battery pack is verified.
In addition, the invention also provides a storage battery validity detection method, which is realized by the storage battery validity detection device, and the method comprises the following steps:
when the storage battery pack normally runs, closing the switch to enable a main contact of the direct current contactor to be in a closed state and enable the main contact to be in short circuit with the voltage reduction silicon chain so as to enable the storage battery pack to be in a floating charge state;
when the validity of the storage battery pack is verified, the switch is disconnected so that the main contact of the direct current contactor is in a disconnected state, the output voltage of a direct current bus of the charger is reduced through the voltage reduction silicon chain, and the storage battery pack bears a conventional load for a station so as to verify the conventional loading capacity of the storage battery pack.
In one embodiment of the invention, the storage battery pack is subjected to a discharge test by inputting a simulation load on the basis of a normal load for the storage battery pack charge station.
In one embodiment of the invention, after the conventional loading capacity of the storage battery pack is verified to be qualified, the internal load is intelligently switched on the basis of the conventional load used by a storage battery pack bearing station, a plurality of circuit breakers are simulated to simultaneously protect tripping or closing action current, the voltage fluctuation and the voltage drop of a direct-current bus are dynamically detected, and the impact resistance capacity of the storage battery pack is verified.
Compared with the prior art, the technical scheme of the invention has the following advantages:
according to the device and the method for detecting the effectiveness of the storage battery, on the premise that a charger and a storage battery pack are not separated from a direct-current system, the effectiveness of the storage battery pack is intelligently detected on the basis of not changing system parameters, the on-line monitoring of the effectiveness of the storage battery pack can be realized, and the technical defects of low overall detection efficiency, high cost and large workload in the prior art are overcome.
Drawings
In order that the present disclosure may be more readily understood, a more particular description of the disclosure will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings
Fig. 1 is a schematic structural diagram of a device for detecting battery validity according to the present invention.
Wherein the reference numerals are as follows: 1. a step-down silicon chain; 2. a direct current contactor; 21. a main contact; 22. an auxiliary contact; 3. a node; 4. a switch; 5. a direct current bus; 6. a storage battery pack.
Detailed Description
The present invention is further described below in conjunction with the drawings and the embodiments so that those skilled in the art can better understand the present invention and can carry out the present invention, but the embodiments are not to be construed as limiting the present invention.
Referring to fig. 1, in the validity detection device for a storage battery pack according to the embodiment of the present invention, the detection device is connected to a dc bus 5 of a charger, the detection device includes a buck silicon chain 1, a dc contactor 2, two nodes 3, and a switch 4, and the buck silicon chain 1 has at least two diodes connected in series; a direct current contactor 2 having a main contact 21 and an auxiliary contact 22, wherein the main contact 21 is connected with the buck silicon chain 1, and the auxiliary contact 22 is connected with the negative electrode of the direct current bus 5; two nodes 3 are respectively arranged at two ends of the voltage-reducing silicon chain 1, wherein one node 3 is connected with a storage battery pack 6, and the other node 3 is connected with the anode of the direct current bus 5; the switch 4 is arranged between the two nodes 3, and the main contact 21 of the direct current contactor 2 is switched between a closed state and an open state through the switch 4; when the validity of the storage battery pack 6 is verified, the switch 4 is switched off to enable the main contact 21 of the direct current contactor 2 to be in a disconnected state, the output voltage of the direct current bus 5 of the charger is reduced through the voltage reduction silicon chain 1, and the storage battery pack 6 is enabled to bear a conventional load for a station so as to verify the conventional loading capacity of the storage battery pack 6.
In the device for detecting the effectiveness of the storage battery pack, the detection on the effectiveness of the storage battery pack 6 is intelligently finished on the basis of not changing system parameters on the premise that a charger and the storage battery pack 6 are not separated from a direct current system, so that the online monitoring on the storage battery pack 6 can be realized, and the technical defects of low overall detection efficiency, high cost and large workload in the prior art are overcome.
The conduction directions of the at least two serially connected diodes are the same, specifically, the node 3 arranged on the anode of the buck silicon chain 1 in the two nodes 3 is connected with the storage battery 6, and the node 3 arranged on the cathode of the buck silicon chain 1 is connected with the anode of the direct current bus 5.
In the storage battery pack effectiveness detection device provided by the invention, when the storage battery pack 6 normally operates, the switch 4 is closed so that the main contact 21 of the direct current contactor 2 is in a closed state and is in short circuit with the voltage reduction silicon chain 1, so that the storage battery pack 6 is in a floating charge state; when the validity of the storage battery pack 6 is verified, the switch 4 is switched off so that the main contact 21 of the direct current contactor 2 is in a disconnected state, the output voltage of the direct current bus 5 of the charger is reduced through the voltage reduction silicon chain 1, and the storage battery pack 6 is enabled to bear a conventional load for a station so as to verify the conventional loading capacity of the storage battery pack 6. On the premise that the charger and the storage battery pack 6 are not separated from the direct current system, the validity of the storage battery pack 6 is intelligently detected on the basis of not changing system parameters, and the storage battery pack 6 can be monitored on line.
In the storage battery pack effectiveness detection device provided by the invention, when the effectiveness of the storage battery pack 6 is verified, the switch 4 is switched off so that the main contact 21 of the direct current contactor 2 is in a disconnected state, the output voltage of the direct current bus 5 of the charger is reduced through the voltage reduction silicon chain 1, the storage battery pack 6 is charged with a conventional load for a station, and if the field load is too small, a simulation load can be input to perform a discharge test on the storage battery pack 6 so as to quickly verify the effectiveness and the loading capacity of the storage battery pack 6.
In the device for detecting the effectiveness of the storage battery, the diode is in one-way conduction and has the automatic voltage reduction characteristic, and the output voltage of the direct current bus 5 of the charger is properly reduced on the premise of ensuring the online charging of the charger, so that the storage battery 6 bears the conventional direct current load for a station and the conventional loading capacity of the storage battery 6 is verified.
The validity detection function of the storage battery pack refers to the fact that the storage battery pack 6 can be automatically, periodically or manually started to comprehensively detect validity, single batteries are opened, a battery pack switch 4 is in a fault or disconnected, the battery pack is fused, a connecting line falls off, a cross-layer line is broken, screws are loosened and the like, so that whether the direct current system can bear normal loads or not is verified, and the operation safety of the direct current system is guaranteed.
In the storage battery pack effectiveness detection device provided by the invention, after the conventional loading capacity of the storage battery pack 6 is verified to be qualified, the impact resistance of the storage battery pack 6 is verified on the basis of the conventional load for the station borne by the storage battery pack 6, namely, the internal load is intelligently switched on the basis of the conventional load for the station borne by the storage battery pack 6, a plurality of circuit breakers are simulated to simultaneously protect tripping or closing action current, the voltage fluctuation and the voltage drop of a direct current bus 5 are dynamically detected, and the impact resistance of the storage battery pack 6 is verified.
In the storage battery pack effectiveness detection device provided by the invention, the analog load is superposed on the basis of bearing the conventional load, and the discharge test is carried out on the storage battery pack 6 so as to quickly verify the tripping impact load carrying capacity of the storage battery pack 6.
In the device for detecting the effectiveness of the storage battery pack, provided by the invention, shallow discharge can be performed on the storage battery pack 6 periodically, so that the vulcanization inhibiting effect can be achieved, and meanwhile, resonance frequency sweeping is performed on the storage battery pack 6 through a variable-frequency pulse scanning technology, so that the effects of eliminating the vulcanization of a battery plate and recovering the battery capacity can be achieved to a certain extent.
In the following, a method for detecting validity of a storage battery pack according to an embodiment of the present invention is introduced, and a method for detecting validity of a storage battery pack described below and a device for detecting validity of a storage battery pack described above may be referred to in a mutually corresponding manner.
The embodiment of the invention also provides a storage battery pack effectiveness detection method, which is realized by the storage battery pack effectiveness detection device, and the method comprises the following steps:
when the storage battery pack 6 normally runs, closing the switch 4 to enable a main contact 21 of the direct current contactor 2 to be in a closed state and enable the main contact to be in short circuit with the voltage reduction silicon chain 1, so that the storage battery pack 6 is in a floating charge state;
when the validity of the storage battery pack 6 is verified, the switch 4 is switched off so that the main contact 21 of the direct current contactor 2 is in a disconnected state, the output voltage of the direct current bus 5 of the charger is reduced through the voltage reduction silicon chain 1, and the storage battery pack 6 bears a conventional load for a station so as to verify the conventional loading capacity of the storage battery pack 6.
In one embodiment of the present invention, the battery pack 6 is subjected to a discharge test by putting a dummy load on the basis that the battery pack 6 bears a normal load for the station.
On the premise that the charger and the storage battery pack 6 are not separated from a direct current system, the method for detecting the validity of the storage battery pack 6 intelligently completes detection of the validity of the storage battery pack 6 on the basis of not changing system parameters, can realize online monitoring of the storage battery pack 6, and overcomes the technical defects of low overall detection efficiency, high cost and large workload in the prior art.
In the method for detecting the validity of the storage battery pack, when the validity of the storage battery pack 6 is verified, the switch 4 is disconnected so that the main contact 21 of the direct current contactor 2 is in a disconnected state, the output voltage of a direct current bus 5 of a charger is reduced through the voltage reduction silicon chain 1, the storage battery pack 6 is used for bearing a conventional load for a station, and if the field load is too small, a simulation load can be input to carry out a discharge test on the storage battery pack 6 so as to quickly verify the validity and the loading capacity of the storage battery pack 6.
In the method for detecting the effectiveness of the storage battery pack, the diode is in one-way conduction and the automatic voltage reduction characteristic is utilized, the output voltage of a direct current bus 5 of the charger is properly reduced on the premise that the charger is on line, and therefore the storage battery pack 6 bears the conventional direct current load for a station and the conventional loading capacity of the storage battery pack 6 is verified.
The validity detection function of the storage battery pack refers to the fact that the storage battery pack 6 can be automatically, periodically or manually started to comprehensively detect validity, single batteries are opened, a battery pack switch 4 is in a fault or disconnected, the battery pack is fused, a connecting line falls off, a cross-layer line is broken, screws are loosened and the like, so that whether the direct current system can bear normal loads or not is verified, and the operation safety of the direct current system is guaranteed.
In an embodiment of the invention, after the conventional loading capacity of the storage battery pack 6 is verified to be qualified, the internal load is intelligently switched on and off on the basis that the storage battery pack 6 bears the conventional load for the station, a plurality of circuit breakers are simulated to simultaneously protect tripping or closing action current, the voltage fluctuation and the voltage drop of the direct current bus 5 are dynamically detected, and the impact resistance of the storage battery pack 6 is verified.
In the method for detecting the effectiveness of the storage battery pack, the analog load is superposed on the basis of bearing the conventional load, and the discharge test is carried out on the storage battery pack 6 so as to quickly verify the load carrying capacity of the tripping impact load of the storage battery pack 6.
In the method for detecting the effectiveness of the storage battery pack, shallow discharge can be performed on the storage battery pack 6 periodically, so that the effect of inhibiting vulcanization can be achieved, and meanwhile, resonance frequency sweeping is performed on the storage battery pack 6 through a variable frequency pulse scanning technology, so that the effects of eliminating the vulcanization of a battery plate and recovering the battery capacity can be achieved to a certain extent.
A method for detecting the validity of a storage battery according to this embodiment is implemented by a device for detecting the validity of a storage battery as described above, and therefore, the detailed implementation of this method can be seen from the previous example section of the device for detecting the validity of a storage battery, and therefore, the detailed implementation thereof can refer to the description of the corresponding example section and will not be further described herein.
In addition, since the method for detecting the validity of the storage battery of the embodiment is implemented by the apparatus for detecting the validity of the storage battery, the function of the method corresponds to that of the apparatus, and is not described again here.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.
Claims (10)
1. The utility model provides a battery validity detection device, detection device connects the direct current generating line of machine that charges, its characterized in that: the detection device includes:
a buck silicon chain having at least two diodes connected in series;
the direct current contactor is provided with a main contact and an auxiliary contact, the main contact is connected with the voltage reduction silicon chain, and the auxiliary contact is connected with the negative electrode of the direct current bus;
two nodes which are respectively arranged at two ends of the voltage-reducing silicon chain, wherein one node is connected with the storage battery pack, and the other node is connected with the anode of the direct-current bus;
the switch is arranged between the two nodes, and the main contact of the direct current contactor is switched between a closed state and an open state through the switch;
when the validity of the storage battery pack is verified, the switch is disconnected so that the main contact of the direct current contactor is in a disconnected state, the output voltage of a direct current bus of the charger is reduced through the voltage reduction silicon chain, and the storage battery pack bears a conventional load for a station so as to verify the conventional loading capacity of the storage battery pack.
2. A battery validity detection apparatus according to claim 1, characterized in that: and when the storage battery pack normally runs, closing the switch to enable a main contact of the direct current contactor to be in a closed state, and enabling the main contact to be in short circuit with the voltage reduction silicon chain to enable the storage battery pack to be in a floating charge state.
3. A battery validity detecting apparatus according to claim 1 or 2, characterized in that: the conduction directions of at least two diodes connected in series in the step-down silicon chain are the same.
4. A battery validity detecting apparatus according to claim 1 or 2, characterized in that: and the node arranged at the anode of the voltage reduction silicon chain in the two nodes is connected with the storage battery, and the node arranged at the cathode of the voltage reduction silicon chain is connected with the anode of the direct current bus.
5. A battery validity detection apparatus according to claim 1, characterized in that: when the validity of the storage battery pack is verified, the switch is switched off to enable the main contact of the direct current contactor to be in a disconnected state, the output voltage of a direct current bus of the charger is reduced through the voltage reduction silicon chain, the storage battery pack is enabled to bear a station conventional load, and on the basis that the storage battery pack bears the station conventional load, the storage battery pack is subjected to a discharge test through inputting a simulation load.
6. A battery validity detection apparatus according to claim 1, characterized in that: and when the conventional loading capacity of the storage battery pack is verified to be qualified, verifying the impact resistance of the storage battery pack on the basis that the storage battery pack bears the conventional load for the station.
7. The battery validity detecting apparatus according to claim 6, wherein: when the conventional loading capacity of the storage battery pack is verified to be qualified, the internal load is intelligently switched on and off on the basis that the storage battery pack bears the conventional load for a station, a plurality of circuit breakers are simulated to simultaneously protect tripping or closing action current, voltage fluctuation and voltage drop of a direct-current bus are dynamically detected, and the impact resistance capacity of the storage battery pack is verified.
8. A method for detecting the effectiveness of a storage battery is characterized by comprising the following steps: the method is implemented by a battery validity detection apparatus as claimed in any one of claims 1 to 7, the method comprising:
when the storage battery pack normally runs, closing the switch to enable a main contact of the direct current contactor to be in a closed state and enable the main contact to be in short circuit with the voltage reduction silicon chain so as to enable the storage battery pack to be in a floating charge state;
when the validity of the storage battery pack is verified, the switch is disconnected so that the main contact of the direct current contactor is in a disconnected state, the output voltage of a direct current bus of the charger is reduced through the voltage reduction silicon chain, and the storage battery pack bears a conventional load for a station so as to verify the conventional loading capacity of the storage battery pack.
9. The battery validity detection method according to claim 8, characterized in that: on the basis that the storage battery pack bears the conventional load for the station, the storage battery pack is subjected to a discharge test by inputting a simulation load.
10. The battery validity detection method according to claim 8, characterized in that: when the conventional loading capacity of the storage battery pack is verified to be qualified, the internal load is intelligently switched on the basis that the storage battery pack bears the conventional load used by a station, tripping or closing action currents are simultaneously protected by simulating a plurality of circuit breakers, voltage fluctuation and voltage drop of a direct-current bus are dynamically detected, and the impact resistance capacity of the storage battery pack is verified.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211347816.2A CN115754785A (en) | 2022-10-31 | 2022-10-31 | Storage battery effectiveness detection device and detection method |
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| CN202211347816.2A CN115754785A (en) | 2022-10-31 | 2022-10-31 | Storage battery effectiveness detection device and detection method |
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| CN202211347816.2A Pending CN115754785A (en) | 2022-10-31 | 2022-10-31 | Storage battery effectiveness detection device and detection method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116953533A (en) * | 2023-06-29 | 2023-10-27 | 国网江苏省电力有限公司泰州供电分公司 | Storage battery remote nuclear capacity monitoring system based on Internet of things |
| CN117970161A (en) * | 2024-02-29 | 2024-05-03 | 国网江苏省电力有限公司泰州供电分公司 | Uninterrupted on-load capacity device and method for storage battery of direct-current system of transformer substation |
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2022
- 2022-10-31 CN CN202211347816.2A patent/CN115754785A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116953533A (en) * | 2023-06-29 | 2023-10-27 | 国网江苏省电力有限公司泰州供电分公司 | Storage battery remote nuclear capacity monitoring system based on Internet of things |
| CN117970161A (en) * | 2024-02-29 | 2024-05-03 | 国网江苏省电力有限公司泰州供电分公司 | Uninterrupted on-load capacity device and method for storage battery of direct-current system of transformer substation |
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