CN109560585B - Battery over-discharge restarting circuit, energy storage device and control method - Google Patents
Battery over-discharge restarting circuit, energy storage device and control method Download PDFInfo
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- CN109560585B CN109560585B CN201811496119.7A CN201811496119A CN109560585B CN 109560585 B CN109560585 B CN 109560585B CN 201811496119 A CN201811496119 A CN 201811496119A CN 109560585 B CN109560585 B CN 109560585B
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- 238000004146 energy storage Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 39
- 238000010586 diagram Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 206010033799 Paralysis Diseases 0.000 description 3
- 239000000306 component Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0069—Charging or discharging for charge maintenance, battery initiation or rejuvenation
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Abstract
The invention discloses a battery over-discharge restarting circuit, an energy storage device and a control method, wherein the battery over-discharge restarting circuit comprises a battery, a bidirectional converter and a battery manager, wherein the bidirectional converter and the battery manager are connected with the battery; the self-rescue circuit can effectively solve the starting problem of the energy storage device after over-discharge, realizes the self-rescue function by adding a small number of components on the basis of the existing circuit of the energy storage device, and has the advantages of strong self-adaptability, low cost, simplicity, convenience and easiness in operation.
Description
Technical Field
The present invention relates to an electric energy storage device, and more particularly, to a battery overdischarge restart circuit, an energy storage device using the same, and a control method of the same.
Background
The electric energy storage device can store electric energy and be used when needed. The core component of the electric energy storage device is a battery, and in the process of long-term recycling, the battery often has serious overdischarge due to the fact that the battery is abnormal or self-discharges, the charge amount (SOC) is lower than a set threshold value, at the moment, a Battery Manager (BMS) enters serious overdischarge logic, all external outputs are cut off, the whole energy storage device cannot be powered on, the battery cannot be discharged or charged, and the whole energy storage device falls into a paralysis state.
Therefore, there is a need in the art to find a reasonable restart circuit that can ensure that the battery pack can be charged by the restart circuit even when the battery pack is over-discharged severely, so that the power energy storage device enters the normal state again.
Disclosure of Invention
The invention provides a battery over-discharge restarting circuit, an energy storage device and a control method, aiming at solving the defect that the battery device is easy to be paralyzed when the battery is over-discharged in the prior art.
The technical scheme adopted by the invention is that the over-discharge restarting circuit of the battery is designed, and the over-discharge restarting circuit comprises the battery, a bidirectional converter and a battery manager, wherein the bidirectional converter and the battery manager are connected with the battery, a cold start button Ks is connected in series between a positive power supply line or a negative power supply line of the battery manager, the cold start button Ks is connected with a power switch K3 in parallel, the battery manager detects the battery electric quantity when the cold start button Ks is closed, and the bidirectional converter and the power switch K3 are controlled according to the battery electric quantity.
A power supply module is connected in series between the battery and the battery manager, and the cold start button Ks and the power switch K3 are connected in series on a positive power supply line or a negative power supply line between the battery and the power supply module.
The power supply module adopts a switching power supply.
And a positive bus and a negative bus are arranged between the battery and the bidirectional converter, a main positive relay is connected on the positive bus in series, a main negative relay is connected on the negative bus in series, and the main positive relay and the negative bus are controlled by the battery manager.
The power switch K3 is an electronic switch or relay.
The power switch K3 adopts a relay, and a pair of normally open contacts of the relay is connected in series with the work indicator lamp module and then connected between two power input ends of the battery manager.
The bidirectional converter is a bidirectional direct current converter.
The invention also designs an energy storage device which adopts the battery over-discharge restarting circuit.
The invention also designs a control method of the battery over-discharge restarting circuit, which comprises the following steps: step 10, closing a cold start button Ks, and starting to detect the battery capacity when the battery manager is electrified; step 20, judging whether the electric quantity of the battery is larger than an over-discharge threshold value, if so, controlling a main positive relay K1 and a main negative relay K2 to be closed, conducting a power switch K3, and then ending the start to enter a normal working mode; if not, entering a charging mode and turning to the step 30; and step 30, sending a charging instruction to the bidirectional converter, and finishing starting to enter a normal working mode when the electric quantity of the battery is greater than or equal to an over-discharge threshold value.
The step 30 comprises: step 31, judging whether the closing time of the cold start button Ks is greater than a delay threshold, if not, turning to step 10, and if so, turning to step 32; step 32, the battery manager controls the main positive relay K1 and the main negative relay K2 to be closed, and conducts the power switch K3; step 33, the battery manager sends a charging instruction to the bidirectional converter; and step 34, judging whether the electric quantity of the battery is greater than an over-discharge threshold value, if not, turning to step 33, and if so, stopping sending a charging instruction to the bidirectional converter.
The delay threshold in step 31 is 5 seconds. The self-rescue circuit can effectively solve the starting problem of the energy storage device after over-discharge, realizes the self-rescue function by adding a small number of components on the basis of the existing circuit of the energy storage device, and has the advantages of strong self-adaptability, low cost, simplicity, convenience and easiness in operation.
Drawings
The invention is described in detail below with reference to examples and figures, in which:
FIG. 1 is a basic functional block diagram of the present invention;
FIG. 2 is a schematic block diagram of a preferred embodiment of the present invention;
FIG. 3 is a block flow diagram of a preferred embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention aims to restart the energy storage device through the overdischarge restarting device to charge the battery and restore the energy storage device which falls into paralysis to a normal working state after the battery in the energy storage device is seriously overdischarged.
The invention discloses a battery overdischarge restart circuit, which is shown in a basic principle block diagram in figure 1 and comprises a battery, a bidirectional converter and a battery manager, wherein the bidirectional converter and the battery manager are connected with the battery, a cold start button Ks is connected in series between a positive power supply line and a negative power supply line of the battery manager, the cold start button Ks is connected with a power switch K3 in parallel, the battery manager detects the battery capacity when the cold start button Ks is closed, and the bidirectional converter and the power switch K3 are controlled according to the battery capacity. The bidirectional converter is connected with an external circuit and has a charging working mode and a discharging working mode. When in the charging mode of operation, external electrical energy is stored in the battery through the bidirectional converter. When in the discharging operation mode, the electric energy in the battery is released to the external circuit through the bidirectional converter. When the power is on, an operator presses a cold start button Ks, the battery supplies power to the battery manager through the cold start button Ks, the battery manager detects the electric quantity of the battery, and the electric quantity of the battery is compared with an over-discharge threshold value; and if the battery capacity is greater than or equal to the over-discharge threshold, sending a charging or discharging instruction to the bidirectional converter and controlling the power switch K3 to be conducted, and if the battery capacity is less than the over-discharge threshold, sending a charging instruction to the bidirectional converter and controlling the power switch K3 to be conducted. The pull-in conduction of the power switch K3 relative to the self-holding switch can ensure that the battery can continuously supply power to the battery manager.
Referring to fig. 2, in the preferred embodiment, the battery manager is connected in series with a power supply module, and the cold start button Ks and the power switch K3 are connected in series with the positive power line or the negative power line between the battery and the power supply module. In a preferred embodiment, the power module employs a switching power supply. In some embodiments, the battery is a battery pack consisting of a plurality of small batteries, the output voltage of the battery pack is high and is not suitable for directly supplying power to the battery manager, and the power supply module can stabilize the voltage and provide a direct current power supply with a proper voltage value to the battery manager.
Referring to fig. 2, in the preferred embodiment, a positive bus and a negative bus are arranged between the battery and the bidirectional converter, a main positive relay is connected in series on the positive bus, a main negative relay is connected in series on the negative bus, and the main positive relay and the negative bus are controlled by the battery manager. The relay contact is connected in series in the direct current bus, so that the energy storage device is controlled, and the safety of the system is improved.
The power switch K3 is an electronic switch or relay. In a preferred embodiment, the power switch K3 is a relay, and a pair of normally open contacts of the relay is connected in series with the work light module and then connected between two power input terminals of the battery manager. The indicator light has two prerequisites of lighting, firstly, the battery manager is powered, and secondly, the power switch K3 is pulled in and conducted. The indicator light is illuminated to provide an operator with an operation indication.
In a preferred embodiment, the bidirectional converter is a bidirectional direct current converter, and a circuit externally connected with the bidirectional direct current converter is a direct current circuit.
The invention also discloses an energy storage device which adopts the battery over-discharge restarting circuit.
The invention also discloses a control method of the battery over-discharge restarting circuit, which comprises the following steps: step 10, closing a cold start button Ks, and starting to detect the battery capacity when the battery manager is electrified; step 20, judging whether the electric quantity of the battery is larger than an over-discharge threshold value or not, if so, indicating that the electric quantity of the battery is large and not over-discharged, controlling a main positive relay K1 and a main negative relay K2 to be closed, conducting a power switch K3, and then ending the starting to enter a normal working mode; if not, the battery is less in electric quantity and is over-discharged, then the charging mode is entered and the step 30 is carried out; and step 30, sending a charging instruction to the bidirectional converter, and finishing starting to enter a normal working mode when the electric quantity of the battery is greater than or equal to an over-discharge threshold value. And after the bidirectional converter enters a normal working mode, the battery manager sends a charging instruction or a discharging instruction to the bidirectional converter. Therefore, the starting problem of the energy storage device after over-discharge can be effectively solved, a small number of components are added on the basis of the existing circuit of the energy storage device to realize the self-rescue function, and the self-rescue circuit has the advantages of strong self-adaptability, low cost, simplicity, convenience and easiness in operation.
Referring to the flow chart of the preferred embodiment shown in fig. 3, the step 30 includes: step 31, judging whether the closing time of the cold start button Ks is greater than a delay threshold, if not, turning to step 10, and if so, turning to step 32; step 32, the battery manager controls the main positive relay K1 and the main negative relay K2 to be closed, and conducts the power switch K3; step 33, the battery manager sends a charging instruction to the bidirectional converter; and step 34, judging whether the electric quantity of the battery is greater than an over-discharge threshold value, if not, turning to step 33, and if so, stopping sending a charging instruction to the bidirectional converter.
In a preferred embodiment, the delay threshold in step 31 is 5 seconds. When the battery is over-discharged, the charging process is not started until the cold start button Ks5 is pressed for a long time, thereby prompting the operator whether to immediately enter the charging step.
Note that the cold start button Ks is a manual button, and when the button is pressed by a hand, the line is turned on, and when the button is released by the hand, the line is turned off. Therefore, the battery manager can work only by being powered on by manually pressing the battery manager at the initial power-on stage, when the power switch K3 is attracted, the cold start button Ks is short-circuited, the battery manager can supply power in a self-holding mode, and at the moment, the Ks can be released without pressing the cold start button Ks. As for when the operator can release the cold start button Ks, firstly, the operator can listen to the sound, and when the operator hears the actuation of the relay, the operator can release the button; and secondly, the indicator light in the working indicator light module is observed, and when the indicator light is on, the button can be released.
The foregoing examples are illustrative only and are not intended to be limiting. Any equivalent modifications or variations without departing from the spirit and scope of the present application should be included in the claims of the present application.
Claims (9)
1. A battery overdischarge restart circuit comprises a battery, a bidirectional converter and a battery manager, wherein the bidirectional converter and the battery manager are connected with the battery, a cold start button Ks is connected in series between a positive power supply line or a negative power supply line of the battery manager, the cold start button Ks is connected with a power switch K3 in parallel, the battery manager detects the electric quantity of the battery when the cold start button Ks is closed, a positive bus and a negative bus are arranged between the battery and the bidirectional converter, a main positive relay K1 is connected to the positive bus in series, a main negative relay K2 is connected to the negative bus in series, and a main positive relay K1 and a main negative relay K2 are controlled by the battery manager; the battery over-discharge restarting circuit is characterized by comprising the following control methods:
step 10, closing a cold start button Ks, and starting to detect the battery capacity when the battery manager is electrified;
step 20, judging whether the electric quantity of the battery is larger than an over-discharge threshold value, if so, controlling a main positive relay K1 and a main negative relay K2 to be closed, conducting a power switch K3, and then ending the start to enter a normal working mode; if not, entering a charging mode and turning to the step 30;
step 30, sending a charging instruction to the bidirectional converter, and finishing starting to enter a normal working mode when the electric quantity of the battery is greater than an over-discharge threshold value; the step 30 comprises:
step 31, judging whether the closing time of the cold start button Ks is greater than a delay threshold, if not, turning to step 10, and if so, turning to step 32;
step 32, the battery manager controls the main positive relay K1 and the main negative relay K2 to be closed, and conducts the power switch K3;
step 33, the battery manager sends a charging instruction to the bidirectional converter;
and step 34, judging whether the electric quantity of the battery is greater than an over-discharge threshold value, if not, turning to step 33, and if so, stopping sending a charging instruction to the bidirectional converter.
2. The battery overdischarge restart circuit of claim 1, wherein a power supply module is connected in series between the battery and the battery manager, and the cold start button Ks and the power switch K3 are connected in series on a positive power line or a negative power line between the battery and the power supply module.
3. The battery over-discharge restart circuit of claim 2 wherein said power module employs a switching power supply.
4. The battery overdischarge restart circuit according to claim 1, wherein said power switch K3 is an electronic switch or a relay.
5. The battery overdischarge restart circuit of claim 1, wherein the power switch K3 is a relay having a pair of normally open contacts connected in series with the operation indicator lamp module between two power input terminals of the battery manager.
6. The battery over-discharge restart circuit of claim 1 wherein said bidirectional converter is a bidirectional dc converter.
7. An energy storage device, characterized in that it employs the battery overdischarge restart circuit according to any one of claims 1 to 6.
8. A control method of a battery over-discharge restart circuit according to any of claims 1 to 6, characterized by comprising the following steps:
step 10, closing a cold start button Ks, and starting to detect the battery capacity when the battery manager is electrified;
step 20, judging whether the electric quantity of the battery is larger than an over-discharge threshold value, if so, controlling a main positive relay K1 and a main negative relay K2 to be closed, conducting a power switch K3, and then ending the start to enter a normal working mode; if not, entering a charging mode and turning to the step 30;
step 30, sending a charging instruction to the bidirectional converter, and finishing starting to enter a normal working mode when the electric quantity of the battery is greater than an over-discharge threshold value; the step 30 comprises:
step 31, judging whether the closing time of the cold start button Ks is greater than a delay threshold, if not, turning to step 10, and if so, turning to step 32;
step 32, the battery manager controls the main positive relay K1 and the main negative relay K2 to be closed, and conducts the power switch K3;
step 33, the battery manager sends a charging instruction to the bidirectional converter;
and step 34, judging whether the electric quantity of the battery is greater than an over-discharge threshold value, if not, turning to step 33, and if so, stopping sending a charging instruction to the bidirectional converter.
9. The control method of claim 8, wherein the delay threshold in step 31 is 5 seconds.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811496119.7A CN109560585B (en) | 2018-12-07 | 2018-12-07 | Battery over-discharge restarting circuit, energy storage device and control method |
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| CN201811496119.7A CN109560585B (en) | 2018-12-07 | 2018-12-07 | Battery over-discharge restarting circuit, energy storage device and control method |
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| CN109560585B true CN109560585B (en) | 2020-10-02 |
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| CN112039100A (en) * | 2020-08-18 | 2020-12-04 | 量道(深圳)储能科技有限公司 | Energy storage device with black start function and black start method |
| CN112087023B (en) * | 2020-08-20 | 2022-07-12 | 珠海格力电器股份有限公司 | Energy storage system, control method and intermittent power supply energy storage device |
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| JP2006029142A (en) * | 2004-07-13 | 2006-02-02 | Toyota Motor Corp | Engine start control device for vehicle |
| FR2995736B1 (en) * | 2012-09-20 | 2015-10-30 | Renault Sas | POWER SYSTEM AND METHOD FOR AN ELECTRIC VEHICLE |
| CN204068215U (en) * | 2014-07-23 | 2014-12-31 | 河南锂动电源有限公司 | With the lithium battery of power-off protection |
| CN107591829A (en) * | 2017-09-25 | 2018-01-16 | 中天储能科技有限公司 | A kind of large-scale energy storage high direct voltage control system and its control method |
| CN207743753U (en) * | 2018-01-24 | 2018-08-17 | 浙江正电信息科技股份有限公司 | A kind of self-starting device of lithium ion battery applications Large UPS power supply |
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