阅读说明：本技术 蓄电池组开路监测及失压补偿装置 (Storage battery pack open circuit monitoring and voltage loss compensation device ) 是由 李文伟 巫聪云 王晓明 陈宝欢 宁庆泉 陈树廷 伍建华 庞丽梅 于 2021-06-24 设计创作，主要内容包括：本发明公开了蓄电池组开路监测及失压补偿装置,涉及蓄电池组维护技术领域。其技术要点是：包括蓄电池组,蓄电池组包括多个电源模块,电源模块包括单电池、主提示电路、失压断电电路、失压补偿电路、副提示电路以及备用电池。本发明具有的优点是当蓄电池组中的任意一个单电池开路或者多个单电池同时开路时,每个开路的电源模块中的备用电池都会代替开路的单电池进行供电,从而保证蓄电池组整体输出电压保持不变,能保证线路上设备的正常运行。(The invention discloses a storage battery open circuit monitoring and voltage loss compensation device, and relates to the technical field of storage battery maintenance. The technical key points are as follows: the storage battery pack comprises a plurality of power modules, and each power module comprises a single battery, a main prompting circuit, a voltage loss power-off circuit, a voltage loss compensation circuit, an auxiliary prompting circuit and a standby battery. The invention has the advantages that when any single battery in the storage battery pack is in an open circuit or a plurality of single batteries are in an open circuit simultaneously, the standby battery in each open-circuit power module can replace the open-circuit single battery to supply power, thereby ensuring that the integral output voltage of the storage battery pack is kept unchanged and ensuring the normal operation of equipment on a line.)

1. Storage battery opens a way monitoring and decompression compensation arrangement, including storage battery (1), its characterized in that: the storage battery pack (1) comprises a plurality of power modules (2), the power modules (2) are connected in series, each power module (2) comprises a single cell (3), a main prompt circuit (4), a voltage loss power-off circuit (5), a voltage loss compensation circuit (6), an auxiliary prompt circuit (7) and a standby battery (8), the negative electrode of each single cell (3) is electrically connected with the negative electrode of the power module (2), the positive electrode of each single cell (3) is electrically connected with the main prompt circuit (4), the main prompt circuit (4) is respectively electrically connected with the first end of the voltage loss power-off circuit (5) and the first end of the voltage loss compensation circuit (6), the second end of the voltage loss power-off circuit (5) is electrically connected with the positive electrode of the power module (2), and the third end of the voltage loss power-off circuit (5) is electrically connected with the negative electrode of each single cell (3), the second end of the voltage loss compensation circuit (6) is electrically connected with the positive electrode of the power module (2), the third end of the voltage loss compensation circuit (6) is electrically connected with the negative electrode of the single battery (3), the fourth end of the voltage loss compensation circuit (6) is electrically connected with the first end of the auxiliary prompt circuit (7), the second end of the auxiliary prompt circuit (7) is electrically connected with the positive electrode of the standby battery (8), the negative electrode of the standby battery (8) is electrically connected with the negative electrode of the single battery (3), and the single battery (3) and the standby battery (8) are both a rechargeable battery.

2. The battery pack open circuit monitoring and voltage loss compensation device according to claim 1, wherein: the main prompt circuit (4) comprises a light emitting diode LED1, the anode of the light emitting diode LED1 is electrically connected with the anode of a battery cell BAT2 and one end of a resistor R7 respectively, the cathode of the light emitting diode LED1 is electrically connected with one end of a resistor R6, and the other end of the resistor R6 is electrically connected with the other end of the resistor R7, the first end of the voltage loss power-off circuit (5) and the first end of the voltage loss compensation circuit (6) respectively.

3. The battery pack open circuit monitoring and voltage loss compensation device according to claim 1, wherein: the voltage-loss power-off circuit (5) comprises a triode Q1, a collector of the triode Q1 is electrically connected to the other end of the resistor R6, one end of the resistor R3 and one end of the resistor R10 respectively, a base of the triode Q1 is electrically connected to the other end of the resistor R3, an emitter of the triode Q1 is electrically connected to the anode of the power module, and the other end of the resistor R10 is electrically connected to the cathode of the battery BAT 2.

4. The battery pack open circuit monitoring and voltage loss compensation device according to claim 1, wherein: the voltage loss compensation circuit (6) comprises a triode Q2, a triode Q2 collector is electrically connected with the other end of the resistor R6, one end of the resistor R5 and one end of the resistor R1 respectively, a triode Q2 base is connected with the other end of the resistor R5, an emitter of the triode Q2 is electrically connected with one end of a pin 2 and one end of a resistor R2 of the optocoupler U1 respectively, the other end of the resistor R2 is electrically connected with the negative electrode of the battery BAT2, a pin 3 of the optocoupler U1 is electrically connected with the positive electrode of the power module, a pin 1 of the optocoupler U1 is electrically connected with the other end of the resistor R1, and a pin 4 of the optocoupler U1 is electrically connected with one end of the auxiliary prompt circuit (7).

5. The battery pack open circuit monitoring and voltage loss compensation device according to claim 1, wherein: the auxiliary prompting circuit (7) comprises a light emitting diode LED2, the negative electrode of the light emitting diode LED2 is electrically connected to the pin 4 of the optocoupler U1 and one end of the resistor R4 respectively, the positive electrode of the light emitting diode LED2 is electrically connected to one end of the resistor R8, the other end of the resistor R8 is electrically connected to the other end of the resistor R4 and the positive electrode of the backup battery FBAT2 respectively, and the negative electrode of the backup battery FBAT2 is connected to the negative electrode of the battery BAT 2.

6. The battery pack open circuit monitoring and voltage loss compensation device according to claim 1, wherein: the type of the spare battery (8) is the same as that of the single battery (3).

Technical Field

The invention relates to the technical field of storage battery pack maintenance, in particular to a storage battery pack open-circuit monitoring and voltage loss compensation device.

Background

The direct current system of the transformer substation is used as a part of an in-station power secondary system and is used for in-station relay protection, monitoring, control, communication and the like. The storage battery pack is used as a backup power supply in the direct current system, and when the external alternating current is lost due to an accident or a fault, the storage battery pack maintains the voltage stability of the direct current bus, ensures the continuous work of relay protection, monitoring, control and communication, ensures the timely action of protection, further enlarges the fault prevention range and the accident range, and effectively ensures the safe operation of the power system. Therefore, the storage battery pack plays an important role in guaranteeing the safe operation of the power system in the direct-current system, particularly at the moment of the key of power failure in an external accident, and is an indispensable important ring. The operational reliability of the storage battery pack is related to the operational safety of a total station power system, and how to guarantee the operational reliability of the storage battery pack becomes the key of a direct current system.

The storage battery pack open-circuit monitoring and voltage loss compensating device is arranged between two groups of direct current buses, a storage battery pack is arranged on the direct current buses, a storage battery pack open-circuit monitoring unit is arranged on the storage battery pack, a voltage loss compensating unit is arranged between the two groups of direct current buses, and the storage battery pack open-circuit monitoring unit is in signal connection with the voltage loss compensating unit; the voltage loss compensation unit comprises a sampling circuit, a first controller and a bidirectional DC/DC power supply subunit which are connected in sequence; the storage battery pack open circuit monitoring unit judges the open circuit state of the storage battery pack; the sampling circuit collects a direct current bus voltage signal and a direct current bus current signal; the first controller receives and records the sampling signal and the storage battery pack open-circuit signal; the bidirectional DC/DC power supply subunit provides voltage compensation for one group of direct current buses to a group of direct current buses with voltage loss. When the device carries out online open circuit monitoring on the storage battery pack, no-voltage compensation can be provided for the no-voltage direct current bus, the voltage of the no-voltage bus is maintained, and the continuous and stable operation of the direct current bus is guaranteed.

The above prior art solution has the following drawbacks: during the process of voltage loss compensation, the voltage on the compensated bus is lower than the normal voltage, and the normal operation of equipment on a line can be influenced by long-time operation.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a storage battery pack open-circuit monitoring and voltage loss compensation device which has the advantages that when any single battery in the storage battery pack is open-circuit or a plurality of single batteries are open-circuit simultaneously, a standby battery in each open-circuit power supply module can replace the open-circuit single battery to supply power, so that the integral output voltage of the storage battery pack is kept unchanged, and the normal operation of equipment on a line can be ensured.

The above object of the present invention is achieved by the following technical solutions:

the storage battery pack open-circuit monitoring and voltage loss compensating device comprises a storage battery pack, wherein the storage battery pack comprises a plurality of power modules, the power modules are connected in series, each power module comprises a single cell, a main prompting circuit, a voltage loss power-off circuit, a voltage loss compensating circuit, an auxiliary prompting circuit and a standby battery, the negative pole of each single cell is electrically connected with the negative pole of each power module, the positive pole of each single cell is electrically connected with the main prompting circuit, the main prompting circuit is respectively electrically connected with the first end of the voltage loss power-off circuit and the first end of the voltage loss compensating circuit, the second end of the voltage loss power-off circuit is electrically connected with the positive pole of the power module, the third end of the voltage loss power-off circuit is electrically connected with the negative pole of the single cell, the second end of the voltage loss compensating circuit is electrically connected with the positive pole of the power module, and the third end of the voltage loss compensating circuit is electrically connected with the negative pole of the single cell, the fourth end of the voltage loss compensation circuit is electrically connected with the first end of the auxiliary prompting circuit, the second end of the auxiliary prompting circuit is electrically connected with the anode of the standby battery, the cathode of the standby battery is electrically connected with the cathode of the single battery, and the single battery and the standby battery are both a rechargeable battery.

Through adopting above-mentioned technical scheme, when arbitrary monocell in the storage battery is opened a way or a plurality of monocells are opened a way simultaneously, the spare battery in every power module of opening a way all can replace the monocell of opening a way to supply power, thereby guarantee that storage battery whole output voltage keeps unchangeable, meanwhile, main suggestion circuit can remind the staff, instruct the staff to take place the concrete position of the monocell of opening a way, help the staff change and maintain it, vice suggestion circuit can indicate whether the operating condition of the corresponding spare battery of staff is normal.

The present invention in a preferred example may be further configured to: the main prompt circuit comprises a light emitting diode LED1, the anode of the light emitting diode LED1 is electrically connected with the anode of a battery cell BAT2 and one end of a resistor R7, the cathode of the light emitting diode LED1 is electrically connected with one end of a resistor R6, and the other end of the resistor R6 is electrically connected with the other end of the resistor R7, the first end of the voltage loss power-off circuit and the first end of the voltage loss compensation circuit.

By adopting the technical scheme, the resistor R6 has the functions of limiting current and protecting the light-emitting diode LED1, the resistor R7 has the functions of reducing the line resistance and shunting, so that the line loss of the single battery BAT2 is reduced, meanwhile, the light-emitting diode LED1 is protected from being damaged, the light-emitting diode LED1 is powered off and extinguished when the single battery BAT2 is open, the specific position of the open single battery BAT2 is prompted to work personnel, and the work personnel are assisted to replace and maintain the open single battery BAT 2.

The present invention in a preferred example may be further configured to: the voltage-loss power-off circuit comprises a triode Q1, a collector of the triode Q1 is electrically connected to the other end of the resistor R6, one end of the resistor R3 and one end of the resistor R10 respectively, a base of the triode Q1 is electrically connected to the other end of the resistor R3, an emitter of the triode Q1 is electrically connected to the positive electrode of the power module, and the other end of the resistor R10 is electrically connected to the negative electrode of the battery cell BAT 2.

By adopting the technical scheme, the trigger voltage threshold of the voltage loss power-off circuit can be changed by changing the resistance of the resistor R3, when the single battery BAT2 is open-circuit or under-voltage, namely the voltage of the single battery BAT2 is reduced to a set threshold, the base voltage of the triode Q1 is reduced to be lower than the conducting voltage, and the triode Q1 is disconnected, so that the single battery BAT2 is protected from over-discharge.

The present invention in a preferred example may be further configured to: the voltage loss compensation circuit comprises a triode Q2, a collector of a triode Q2 is electrically connected to the other end of a resistor R6, one end of a resistor R5 and one end of a resistor R1 respectively, a base of the triode Q2 is connected to the other end of a resistor R5, an emitter of the triode Q2 is electrically connected to one end of a pin 2 and one end of a resistor R2 of an optocoupler U1 respectively, the other end of the resistor R2 is electrically connected to the negative electrode of a battery BAT2, a pin 3 of the optocoupler U1 is electrically connected to the positive electrode of a power supply module, a pin 1 of the optocoupler U1 is electrically connected to the other end of the resistor R1, and a pin 4 of the optocoupler U1 is electrically connected to one end of the auxiliary prompt circuit.

By adopting the technical scheme, the trigger voltage threshold of the voltage loss compensation circuit can be changed by changing the resistance of the resistor R5, when the single cell BAT2 is open-circuit or under-voltage, namely the voltage of the single cell BAT2 is reduced to a set threshold, the base voltage of the triode Q2 is reduced to be lower than the conducting voltage, the triode Q2 is disconnected, the optocoupler U1 is connected, and the auxiliary prompt circuit and the standby battery are connected.

The present invention in a preferred example may be further configured to: the auxiliary prompting circuit comprises a light emitting diode LED2, the negative electrode of the light emitting diode LED2 is electrically connected to the pin 4 of the optocoupler U1 and one end of the resistor R4 respectively, the positive electrode of the light emitting diode LED2 is electrically connected to one end of the resistor R8, the other end of the resistor R8 is electrically connected to the other end of the resistor R4 and the positive electrode of the backup battery FBAT2 respectively, and the negative electrode of the backup battery FBAT2 is connected to the negative electrode of the battery BAT 2.

Through adopting above-mentioned technical scheme, the function of resistance 86 lies in the restriction electric current, protection emitting diode LED2, the effect of resistance R4 lies in reducing the line resistance, shunt simultaneously, make reserve battery FBAT 2's line loss reduce, protect emitting diode LED2 not damaged simultaneously, emitting diode LED1 goes up and lights when opto-coupler U1 switches on, the concrete position of the reserve battery FBAT2 of suggestion staff's work, supplementary staff is follow-up charges it.

The present invention in a preferred example may be further configured to: the spare battery model is the same as the single battery model.

By adopting the technical scheme, the performance of the standby battery is completely the same as that of a single battery, and the applicability of the standby battery is improved.

In summary, the invention includes at least one of the following beneficial technical effects:

1. through adopting above-mentioned technical scheme, when arbitrary monocell in the storage battery is opened a way or a plurality of monocells are opened a way simultaneously, the spare battery in every power module of opening a way all can replace the monocell of opening a way to supply power, thereby guarantee that storage battery whole output voltage keeps unchangeable, meanwhile, main suggestion circuit can remind the staff, instruct the staff to take place the concrete position of the monocell of opening a way, help the staff change and maintain it, vice suggestion circuit can indicate whether the operating condition of the corresponding spare battery of staff is normal.

Drawings

FIG. 1 is a block schematic of the present invention.

Fig. 2 is a circuit schematic of a single power supply module of fig. 1.

Reference numerals: 1. a battery pack; 2. a power supply module; 3. a single cell; 4. a main prompting circuit; 5. a voltage loss power-off circuit; 6. a voltage loss compensation circuit; 7. a secondary cue circuit; 8. and a backup battery.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 and 2, the open circuit monitoring and voltage loss compensating device for a battery pack 1 disclosed by the present invention comprises a battery pack 1, wherein the battery pack 1 comprises a plurality of power modules 2, the plurality of power modules 2 are connected in series, each power module 2 comprises a single cell 3, a main prompting circuit 4, a voltage loss circuit breaker 5, a voltage loss compensating circuit 6, an auxiliary prompting circuit 7 and a backup battery 8, the negative electrode of the single cell 3 is electrically connected with the negative electrode of the power module 2, the positive electrode of the single cell 3 is electrically connected with the main prompting circuit 4, the main prompting circuit 4 is respectively electrically connected with the first end of the voltage loss circuit 5 and the first end of the voltage loss compensating circuit 6, the second end of the voltage loss circuit 5 is electrically connected with the positive electrode of the power module 2, the third end of the voltage loss circuit 5 is electrically connected with the negative electrode of the single cell 3, the second end of the voltage loss compensating circuit 6 is electrically connected with the positive electrode of the power module 2, the third end of the voltage loss compensation circuit 6 is electrically connected with the cathode of the single battery 3, the fourth end of the voltage loss compensation circuit 6 is electrically connected with the first end of the auxiliary prompt circuit 7, the second end of the auxiliary prompt circuit 7 is electrically connected with the anode of the standby battery 8, the cathode of the standby battery 8 is electrically connected with the cathode of the single battery 3, and the single battery 3 and the standby battery 8 are both a rechargeable battery. When any one monocell 3 in the storage battery pack 1 is opened or a plurality of monocells 3 are opened simultaneously, the spare battery 8 in each opened power module 2 can replace the monocell 3 to supply power, so that the whole output voltage of the storage battery pack 1 is kept unchanged, meanwhile, the main prompting circuit 4 can remind a worker, the specific position of the monocell 3 which is opened by the worker is indicated, the worker is helped to replace and maintain the monocell 3, and the auxiliary prompting circuit 7 can prompt whether the working state of the corresponding spare battery 8 of the worker is normal or not.

As shown in fig. 2, the main prompt circuit 4 includes a light emitting diode LED1, an anode of the light emitting diode LED1 is electrically connected to an anode of the battery cell BAT2 and one end of the resistor R7, a cathode of the light emitting diode LED1 is electrically connected to one end of the resistor R6, and another end of the resistor R6 is electrically connected to another end of the resistor R7, a first end of the no-voltage power-off circuit 5, and a first end of the no-voltage compensation circuit 6. The resistor R6 has the functions of limiting current and protecting the light emitting diode LED1, the resistor R7 has the functions of reducing the line resistance value and shunting, so that the line loss of the single battery BAT2 is reduced, the light emitting diode LED1 is protected from being damaged, the light emitting diode LED1 is powered off and extinguished when the single battery BAT2 is open, the specific position of the open single battery BAT2 is prompted to be changed and maintained by workers, and the replacement and the maintenance of the open single battery BAT2 are assisted by the workers.

As shown in fig. 2, the voltage-loss power-off circuit 5 includes a transistor Q1, a collector of the transistor Q1 is electrically connected to the other end of the resistor R6, one end of the resistor R3, and one end of the resistor R10, a base of the transistor Q1 is electrically connected to the other end of the resistor R3, an emitter of the transistor Q1 is electrically connected to the positive electrode of the power module, and the other end of the resistor R10 is electrically connected to the negative electrode of the battery BAT 2. The trigger voltage threshold of the voltage loss power-off circuit 5 can be changed by changing the resistance of the resistor R3, when the single cell BAT2 is open-circuit or under-voltage, namely the voltage of the single cell BAT2 is reduced to a set threshold, the base voltage of the triode Q1 is reduced to be lower than the conducting voltage, the triode Q1 is disconnected, and the voltage loss power-off circuit 5 is disconnected, so that the single cell BAT2 is protected, and the over-discharge of the single cell BAT2 is avoided.

As shown in fig. 2, the voltage-loss compensation circuit 6 includes a transistor Q2, a collector of the transistor Q2 is electrically connected to the other end of a resistor R6, one end of a resistor R5, one end of a resistor R1, a base of the transistor Q2 is connected to the other end of a resistor R5, an emitter of the transistor Q2 is electrically connected to a pin 2 of an optocoupler U1, one end of a resistor R2, the other end of the resistor R2 is electrically connected to a negative electrode of a battery BAT2, a pin 3 of the optocoupler U1 is electrically connected to a positive electrode of a power module 2, a pin 1 of the optocoupler U1 is electrically connected to the other end of a resistor R1, and a pin 4 of the optocoupler U1 is electrically connected to one end of a sub-prompt circuit 7. The trigger voltage threshold of the voltage loss compensation circuit 6 can be changed by changing the resistance of the resistor R5, when the single cell BAT2 is open-circuited or under-voltage occurs, that is, when the voltage of the single cell BAT2 drops to a set threshold, the base voltage of the triode Q2 drops below the conducting voltage, the triode Q2 is disconnected, the optocoupler U1 is connected, and the auxiliary prompting circuit 7 and the backup battery 8 are connected.

As shown in fig. 2, the auxiliary prompting circuit 7 includes a light emitting diode LED2, a negative electrode of the light emitting diode LED2 is electrically connected to the pin 4 of the optocoupler U1 and one end of the resistor R4, a positive electrode of the light emitting diode LED2 is electrically connected to one end of the resistor R8, the other end of the resistor R8 is electrically connected to the other end of the resistor R4 and a positive electrode of the backup battery FBAT2, and a negative electrode of the backup battery FBAT2 is connected to a negative electrode of the battery BAT 2. The function of the resistor 86 is to limit current, protect the light emitting diode LED2, the function of the resistor R4 is to reduce the line resistance and shunt the current, so that the line loss of the backup battery FBAT2 is reduced, the light emitting diode LED2 is protected from being damaged, the light emitting diode LED1 is turned on when the optical coupler U1 is turned on, the specific position of the backup battery FBAT2 for prompting the working personnel to work is prompted, and the working personnel are assisted to charge the backup battery FBAT2 subsequently.

As shown in fig. 1, the backup battery 8 is the same size as the single cell 3. This arrangement makes the performance of the battery backup 8 exactly the same as that of the single cell 3, and increases the applicability of the battery backup 8.

The implementation principle of the embodiment is as follows: when the invention is used, corresponding electrical components are connected according to the description and the drawings in the invention, the threshold value of the voltage loss power-off circuit 5 is adjusted by adjusting the resistance value of the resistor R3, the threshold value of the voltage loss compensation circuit 6 is adjusted by adjusting the resistance value of the resistor R5, then the system is started, when the voltage loss power-off circuit 5 and the voltage loss compensation circuit 6 in one power module 2 simultaneously monitor that the voltage of the single battery BAT2 is reduced below the preset voltage, the voltage loss power-off circuit 5 is immediately disconnected, the single battery BAT2 is immediately in an open circuit state, meanwhile, the voltage loss compensation circuit 6 is conducted, the voltage loss compensation circuit 6 controls the backup battery FBAT2 to supply power to the storage battery pack 1 instead of the single battery BAT2, the main prompt circuit 4 is powered off, the light emitting diode LED1 is extinguished, a worker is prompted to replace the failed single battery BAT2 for maintenance, and the auxiliary prompt circuit 7 is conducted, the light-emitting diode LED2 lights up to prompt a worker that the working state of the backup battery FBAT2 is normal, after the worker maintains and replaces the single battery BAT2 with voltage loss, the single battery BAT2 is connected into the power supply module 2 again, the voltage of the single battery BAT2 is in a normal range at the moment, the voltage loss power-off circuit 5 is connected, the main prompt circuit 4 is connected, the voltage loss compensation circuit 6 is powered off, the auxiliary prompt circuit 7 is powered off, the backup battery FBAT2 is in an open circuit state, the circuit is recovered to be normal, then the backup battery FBAT2 is fully charged, and therefore when any single battery BAT2 in the storage battery pack 1 is under voltage, the backup battery FBAT2 can replace the single battery BAT2 with the under voltage to supply power to the storage battery pack 1, the whole output voltage of the storage battery pack 1 is guaranteed to be kept unchanged, and normal operation of equipment on a line can be guaranteed.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.