CN212304789U - Energy storage battery double protection structure for energy storage system - Google Patents
Energy storage battery double protection structure for energy storage system Download PDFInfo
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- CN212304789U CN212304789U CN202020762126.3U CN202020762126U CN212304789U CN 212304789 U CN212304789 U CN 212304789U CN 202020762126 U CN202020762126 U CN 202020762126U CN 212304789 U CN212304789 U CN 212304789U
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Abstract
The utility model discloses an energy storage battery duplicate protection structure for energy storage system, energy storage system includes battery module, relay group, energy storage converter and the direct current power supply who establishes ties and/or parallelly connected formation by a plurality of electricity core, its characterized in that: each battery cell is provided with a battery management unit BMU and a relay; the direct-current power supply is connected with the battery management unit BMU and the computer platform BCU in series; the energy storage converter is sequentially connected with the main positive relay, the battery module and the main negative relay in series to form a loop. The utility model discloses when BCU became invalid or the adhesion of unilateral relay inefficacy, but the major loop of safe disconnection, protection battery prevented to take place the overcharge, and the overdischarge or explosion.
Description
Technical Field
The utility model belongs to energy storage battery management system field, concretely relates to energy storage battery duplicate protection structure for energy storage system.
Background
The battery management system BMS mainly comprises a detection module, a master control module, a slave control module and the like. The capacity of the battery is not constant and continuously decays along with the continuous discharge in the life cycle, and the decay rate is related to many factors, such as overcharge, overdischarge, too high and too low ambient temperature, etc., which all affect the service life of the battery and even cause permanent damage. The working conditions of the battery cells are different due to the difference in the consistency of the battery cell monomers or the difference in the heat dissipation conditions caused by the installation positions. The problem of one cell in the battery pack is a catastrophic influence on the whole system, so that the monitoring and management of a single cell are particularly important.
The current market controls relays for a battery management master control system, and the relays depend on the battery management master control system excessively. And once the master control fails, the whole energy storage system is in a brain-free state, and the consequences are extremely serious.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides an energy storage battery duplicate protection structure can protect the battery, prevents to take place to cross to fill, cross to put or explode.
The technical scheme of the utility model is that: a energy storage battery duplicate protection structure for energy storage system, energy storage system includes battery module (1), relay group (2), energy storage converter (3) and DC power supply (4) that are established ties and/or parallelly connected formation by a plurality of electricity core (11), its characterized in that: each battery cell (11) is provided with a battery management unit BMU (12) and a relay Kn-1; the direct current power supply system is characterized by further comprising a computer platform BCU (5), wherein the computer platform BCU (5) is connected with a relay Kn, the positive end and the negative end of the energy storage system are respectively connected with a main positive relay (7) and a main negative relay (6), and the direct current power supply (4) is connected with the battery management unit BMU (12) and the computer platform BCU (5) in series; the energy storage converter (3) is sequentially connected with the main positive relay (7), the battery module (1) and the main negative relay (6) in series to form a loop; wherein n is an integer of 2 or more.
Preferably, the battery management unit BMU (12) and the computer platform BCU (5) are connected in series, and the battery management unit BMU comprises a control unit which can independently control the on-off of the correspondingly connected relays. BMU and BCU can both break off automatically when control relay is unusual, and mutually independent.
Preferably, the energy storage system further comprises a circuit breaker release (9) and a fuse (8) which are connected in series between the positive pole of the energy storage system and a main positive relay (7), and the circuit breaker release (9) can be controlled to be opened by the computer platform BCU (5). Once the relay end fails and is adhered, the BCU can enable the release to disconnect the circuit breaker and achieve the strategy of double protection on hardware.
Preferably, the relay group (2) further comprises a pre-charging relay (10), and the pre-charging relay (10) is connected with a resistor R1 in series and then is connected with a main positive relay (7) in parallel.
Preferably, the battery management unit BMU (12) and the computer platform BCU (5) each include an abnormality detection unit for mutually detecting an abnormality. The BMU or BCU can identify serious warnings such as overvoltage, undervoltage, insulation and the like, and can automatically turn off the Kn control switch after detecting the abnormity. The BMU and the BCU can recognize warning and independently disconnect, and the energy storage battery is protected.
Preferably, the battery management unit BMU (12) and the control unit of the computer platform BCU (5) comprise an integrated driving chip, a MOS tube and an IGBT. The relay control end adopts MOS pipe or IGBT (Insulated Gate Bipolar Transistor), realizes the control to the relay control end, can realize the control to the relay safely conveniently.
Preferably, the control unit comprises an anti-kickback design. The BMU and the BCU relay control have anti-reverse design, and can prevent short circuit phenomenon caused by reverse connection in actual wiring.
Compared with the prior art, the beneficial effects of the utility model are mainly embodied in that:
when BCU became invalid or unilateral relay became invalid and adheres, the utility model discloses all can the safe disconnection major loop, the protection battery prevents to take place the overcharge, and the overdischarge or take place the explosion.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a topological diagram of the battery system of the present invention.
The system comprises a battery module 1, a battery core 11, a battery management unit BMU 12, a relay group 2, an energy storage converter 3, a direct-current power supply 4, a computer platform BCU 5, a total negative relay 6, a total positive relay 7, a fuse 8, a circuit breaker tripper 9 and a pre-charging relay 10.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the utility model provides an energy storage battery duplicate protection structure for energy storage system, energy storage system includes battery module 1, relay group 2, energy storage converter 3 and direct current power supply 4, its characterized in that are established ties and/or parallelly connected formation by a plurality of electricity core 11: each battery cell 11 is provided with a battery management unit BMU 12 and a relay Kn-1, wherein n is an integer greater than or equal to 2; the system is characterized by further comprising a computer platform BCU 5, wherein the computer platform BCU 5 is connected with a relay Kn, the positive end and the negative end of the energy storage system are respectively connected with a main positive relay 7 and a main negative relay 6, and the direct-current power supply 4 is connected with the battery management unit BMU 12 and the computer platform BCU 5 in series; the energy storage converter 3 is sequentially connected with the main positive relay 7, the battery module 1 and the main negative relay 6 in series to form a loop.
The battery management unit BMU 12 and the computer platform BCU 5 are connected in series and comprise control units which can independently control the on-off of the correspondingly connected relays. BMU and BCU can both break off automatically when control relay is unusual, and mutually independent.
For better implementation, the energy storage system further comprises a circuit breaker tripper 9 and a fuse 8 which are connected in series between the positive pole of the energy storage system and the main positive relay 7, and the circuit breaker tripper 9 can be controlled to be disconnected by the computer platform BCU 5. Once the relay end fails and is adhered, the BCU can enable the release to disconnect the circuit breaker and achieve the strategy of double protection on hardware. The relay group 2 further comprises a pre-charging relay 10, and the pre-charging relay 10 is connected in series with a resistor R1 and then connected in parallel with the main positive relay 7.
The battery management unit BMU 12 and the computer platform BCU 5 each include an abnormality detection unit for mutually detecting abnormality. The BMU or BCU can identify serious warnings such as overvoltage, undervoltage, insulation and the like, and can automatically turn off the Kn control switch after detecting the abnormity. The BMU and the BCU can recognize warning and independently disconnect, and the energy storage battery is protected.
The battery management unit BMU 12 and the control unit of the computer platform BCU 5 comprise an integrated driving chip, an MOS tube and an IGBT. The relay control end adopts MOS pipe or IGBT, realizes the control to the relay control end, can realize the control to the relay safely conveniently. The control unit includes an anti-kickback design. The BMU and the BCU relay control have anti-reverse design, and can prevent short circuit phenomenon caused by reverse connection in actual wiring.
The battery management unit BMU 12 and the computer platform BCU 5 are connected in series and comprise control units which can independently control the on-off of the correspondingly connected relays. The BMU 12 and the BCU 5 each include an abnormality detection unit for mutually detecting an abnormality. The control unit comprises an integrated driving chip, an MOS (metal oxide semiconductor) tube and an IGBT (insulated gate bipolar transistor); the control of the relay control end can be realized. In the design of the battery management unit BMU 12 and the computer platform BCU 5, the relay control needs to be designed to prevent reverse connection, so that the short circuit phenomenon caused by reverse connection in actual wiring is prevented.
In this embodiment, at power up, the BMU 12 and BCU 5 control the relays to power up normally, the general negative relay 6 is closed, and then the pre-charge relay 10 is closed. After the pre-charging is finished, the total negative relay 6 is closed, and other relays and control switches K1, K2..
In the running process of the system, once the BCU 5 identifies serious alarms, such as overvoltage, undervoltage, insulation and the like, the BCU 5 automatically switches off the Kn control switch. Once the BMU 12 identifies a serious alarm, such as an over-voltage, under-voltage, communication failure, etc., the BMU 12 will open the corresponding switch. In the BCU 5 and BMU 12 control relay strategies, the relay strategies are independent of each other and can be independently disconnected. BCU 5 and BMU 12 can monitor abnormality mutually, and double protection is achieved. The device of this embodiment also includes a fuse 8 that rapidly blows the protection circuit in the event of an overvoltage. For the relay, once the relay end fails and is adhered, the BCU 5 can also disconnect the circuit breaker tripper 9, so that a strategy of double protection on hardware is achieved.
When the power is off, the BMU 12 and the BCU 5 control the relays to normally power off, the collected current is 0, the total positive relay 7 is disconnected, and then the total negative relay 6 is disconnected. Upon completion of normal power-up and power-down, K1, K2... Kn for both BCU 5 and BMU are off.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (7)
1. A energy storage battery duplicate protection structure for energy storage system, energy storage system includes battery module (1), relay group (2), energy storage converter (3) and DC power supply (4) that are established ties and/or parallelly connected formation by a plurality of electricity core (11), its characterized in that: each battery cell (11) is provided with a battery management unit BMU (12) and a relay Kn-1, wherein n is an integer more than or equal to 2; the direct current power supply system is characterized by further comprising a computer platform BCU (5), wherein the computer platform BCU (5) is connected with a relay Kn, the positive end and the negative end of the energy storage system are respectively connected with a total positive relay (7) and a total negative relay (6), and the direct current power supply (4) is connected with the battery management unit BMU (12) and the computer platform BCU (5) in series; the energy storage converter (3) is connected with the total positive relay (7), the battery module (1) and the total negative relay (6) in series in sequence to form a loop.
2. The dual protection architecture for an energy storage battery of an energy storage system of claim 1, wherein: the battery management unit BMU (12) and the computer platform BCU (5) are connected in series and comprise control units which can independently control the on-off of the correspondingly connected relays.
3. The dual protection architecture for an energy storage battery of an energy storage system of claim 1, wherein: the energy storage system further comprises a circuit breaker tripper (9) and a fuse (8) which are connected in series between the positive pole of the energy storage system and the main positive relay (7), and the circuit breaker tripper (9) is controlled to be disconnected by the computer platform BCU (5).
4. The dual protection architecture for an energy storage battery of an energy storage system of claim 1, wherein: the relay group (2) further comprises a pre-charging relay (10), and the pre-charging relay (10) is connected with the resistor R1 in series and then connected with the main positive relay (7) in parallel.
5. The dual protection architecture for an energy storage battery of an energy storage system of claim 1, wherein: the battery management unit BMU (12) and the computer platform BCU (5) each include an abnormality detection unit for mutually detecting abnormality.
6. An energy storage battery dual protection architecture for an energy storage system as claimed in claim 2, wherein: the battery management unit BMU (12) and the control unit of the computer platform BCU (5) comprise an integrated driving chip, an MOS tube and an IGBT.
7. An energy storage battery dual protection architecture for an energy storage system as claimed in claim 2, wherein: the control unit includes an anti-kickback design.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020762126.3U CN212304789U (en) | 2020-05-09 | 2020-05-09 | Energy storage battery double protection structure for energy storage system |
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| CN202020762126.3U CN212304789U (en) | 2020-05-09 | 2020-05-09 | Energy storage battery double protection structure for energy storage system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112768825A (en) * | 2021-01-15 | 2021-05-07 | 华富(江苏)锂电新技术有限公司 | High-safety lithium battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112768825A (en) * | 2021-01-15 | 2021-05-07 | 华富(江苏)锂电新技术有限公司 | High-safety lithium battery |
| CN112768825B (en) * | 2021-01-15 | 2023-04-25 | 华富(江苏)锂电新技术有限公司 | High-safety lithium battery |
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Effective date of registration: 20210929 Address after: 213031 Tianhe PV Industrial Park No. 2, Xinbei District, Changzhou, Jiangsu Patentee after: TRINA ENERGY STORAGE SOLUTIONS (JIANGSU) Co.,Ltd. Address before: 213031 Tianhe PV Industrial Park No. 2, Xinbei District, Changzhou, Jiangsu Patentee before: TRINA SOLAR Co.,Ltd. |
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| TR01 | Transfer of patent right |