WO2018214263A1 - Dispositif de protection d'alimentation électrique, système de stockage d'énergie de batterie et équipement électrique - Google Patents

Dispositif de protection d'alimentation électrique, système de stockage d'énergie de batterie et équipement électrique Download PDF

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Publication number
WO2018214263A1
WO2018214263A1 PCT/CN2017/093122 CN2017093122W WO2018214263A1 WO 2018214263 A1 WO2018214263 A1 WO 2018214263A1 CN 2017093122 W CN2017093122 W CN 2017093122W WO 2018214263 A1 WO2018214263 A1 WO 2018214263A1
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WO
WIPO (PCT)
Prior art keywords
switch
power supply
protection
power
relay
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Application number
PCT/CN2017/093122
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English (en)
Chinese (zh)
Inventor
李家德
苏晓越
陈其峰
Original Assignee
宁德时代新能源科技股份有限公司
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Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Publication of WO2018214263A1 publication Critical patent/WO2018214263A1/fr

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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

Definitions

  • the present application relates to the field of battery technologies, and in particular, to a power protection device, a battery energy storage system, and a power device.
  • large-scale power supply protection devices are widely used in power stations, company energy storage systems, and the like.
  • it is generally controlled by a power supply switch relay to discharge externally.
  • the power supply switch relay is turned off, the discharge is stopped, and the power supply switch relay is closed to start discharging.
  • the embodiment of the present application provides a power protection device, a battery energy storage system, and a power consumption device, which are designed to solve the technical problem that the relay is likely to occur when the power switch relay is turned off in the related art, and reduce the relay viscosity. The possibility of connecting, improving safety.
  • the embodiment of the present application provides a power supply protection device, including: a power supply device; a power switch relay connected to an output end of the power supply device; and a switch protection circuit connected in parallel with the power switch relay, the switch
  • the protection circuit includes a protection switch and a shunt element in series with the shunt element.
  • the power supply device includes a plurality of battery modules, and each of the battery modules is formed by connecting a plurality of batteries in parallel.
  • the protection switch is a relay.
  • the shunt element is a resistor
  • the resistor is a resistance fixed resistance or a resistance adjustable resistor.
  • the power switch relay has one or more of the switch protection circuits connected in parallel.
  • the shunt elements of each of the switch protection circuits have different resistance levels, and correspondingly, the plurality of switch protection circuits respectively have different security levels.
  • the shunt elements of each of the switch protection circuits have the same resistance, and any one of the plurality of switch protection circuits forms a switch protection circuit group.
  • all of the switch protection circuits in the switch protection circuit group have the same open/close state, and the plurality of switch protection circuit groups respectively have different security levels.
  • the embodiment of the present application provides a battery energy storage system, including the power protection device according to any one of the above aspects.
  • the embodiment of the present application provides a power device, including the power protection device according to any one of the foregoing first aspects.
  • the above technical solution may be a switch protection circuit in parallel with the power supply switch relay, the switch protection circuit includes a protection switch and a shunt component.
  • the protection switch of the switch protection circuit When the power switch relay is closed and the power supply device discharges, the protection switch of the switch protection circuit is Disconnected, then, when the power switch relay needs to be disconnected, the protection switch of the switch protection circuit can be closed first, so that the protection circuit is turned on. Since the protection circuit has a shunt component, after the protection circuit is turned on, the power supply device flows out. The current is partially shunted by the shunt element, reducing the current through the power switch relay.
  • the protection switch 1062 is turned off, thereby smoothly stopping the power supply.
  • 1 is a circuit diagram showing the power supply protection device of one embodiment of the present application.
  • FIG. 2 is a circuit diagram showing the power supply protection device of another embodiment of the present application.
  • FIG. 3 shows a block diagram of a battery energy storage system of one embodiment of the present application
  • FIG. 4 shows a block diagram of a powered device of one embodiment of the present application.
  • FIG. 1 shows a circuit link of a power protection device of an embodiment of the present application. intention.
  • an embodiment of the present application provides a power protection device 100 including a power supply device 102 , a power supply switch relay 104 , and a switch protection circuit 106 .
  • a first end of the power switch relay 104 is coupled to an output of the power supply device 102, a second end of the power switch relay 104 is coupled to the load, and a switch protection circuit 106 is coupled in parallel with the power switch relay 104, the switch protection circuit 106
  • a protection switch 1062 and a shunt element 1064 are included.
  • the protection switch 1062 is connected in series with the shunt element 1064.
  • One end of the protection switch 1062 is connected to the power switch relay 104, and the other end of the protection switch 1062 is connected to one end of the shunt element 1064.
  • the other end of the shunt element 1064 is coupled to the second end of the power switch relay 104.
  • a switch protection circuit 106 may be connected in parallel to the power supply switch relay 104.
  • the switch protection circuit 106 includes a protection switch 1062 and a shunt element 1064.
  • the switch protection circuit 106 is The protection switch 1062 is disconnected.
  • the protection switch 1062 of the switch protection circuit 106 can be closed to turn on the protection circuit. Since the protection circuit has the shunt component 1064, the protection circuit guide After the pass, the primary current flowing out of the power supply unit 102 is partially shunted by the shunt element 1064, thereby reducing the current through the power switch relay 104.
  • the protection switch 1062 is turned off, thereby smoothly stopping the power supply.
  • the power protection device 100 also has the following additional technical features:
  • the power supply device 102 includes a plurality of battery modules, and each battery module is formed by connecting a plurality of batteries in parallel. That is to say, the present application is mainly applied to a case where the power supply current is large, and the more battery modules in the power supply device 102, the greater the power supply capability.
  • the protection switch 1062 can be a relay, which is a switch that controls a large current through a small current, which has the advantage of high degree of automation.
  • the protection switch 1062 can also be any other type of switch with an open/close jump function.
  • the shunting element 1064 can be a resistor or any other component having a resistance value. As long as the original current flowing out of the power supply device 102 can be shunted by the resistance value, the purpose of improving the probability of the power switch relay 104 being successfully disconnected can be achieved.
  • the resistor is a resistance fixed resistor, and the shunting capability corresponding to the resistance fixed resistor is also fixed.
  • the resistor is a resistance adjustable resistor. due to:
  • the resistance of the power supply switch relay 104 is 100 ohms, the original current flowing out of the power supply device 102 is 1.1 kA, and when the resistance of the power distribution element is adjusted to 1 k ohm, the current through the power supply switch relay 104 is shunted and reduced to 1 kA, when shunting
  • the resistance of the element is adjusted to 2.1 k ohms, the current through the power supply switch relay 104 is shunted and reduced to 0.5 kA. That is to say, the actual shunting capability of the switch protection circuit 106 can be adjusted by changing the resistance of the resistor, making the adjustment of the power switch relay 104 and even the entire system more flexible.
  • the resistance and current parameters of the components in the actual scenario are not limited to the above examples.
  • the load connected to the second end of the power switch relay 104 can be any equipment, a hydropower station or the like that requires electrical energy.
  • the battery management unit receives the power supply stop information, so the protection switch 1062 can be closed according to the power supply stop information, so that the switch protection circuit 106 is in the path.
  • the power supply switch relay 104 is turned off.
  • the switch relay 104 is successfully disconnected, that is, when the current of the branch where the power switch relay 104 is located is zero, the protection switch 1062 is disconnected according to the stop of the power supply information, and finally the purpose of stopping the power supply is achieved.
  • the resistance of the shunt element 1064 is adjustable, the The battery management unit adjusts its resistance. For example, different resistance options can be set on the operation interface of the battery management unit for the user to select.
  • FIG. 2 is a circuit diagram showing the power protection device of another embodiment of the present application.
  • the power switch relay 104 has one or more of the switch protection circuits 106 connected in parallel, and the plurality of switch protection circuits 106 are simultaneously shunted to achieve a stronger shunting capability, thereby further reducing the pass of the power switch relay 104.
  • the current increases the probability that the power switch relay 104 is successfully disconnected.
  • Three switch protection circuits 106 are schematically illustrated in FIG. 2, but in actuality, the number of switch protection circuits 106 is not limited thereto.
  • the shunt elements 1064 of each of the switch protection circuits 106 have the same resistance, and any one of the plurality of switch protection circuits 106 forms a switch.
  • the protection circuit 106 is set, and all of the switch protection circuits 106 are in the same open/close state. Accordingly, the plurality of switch protection circuits 106 respectively have different security levels.
  • switch protection circuits a, b, c, and d are provided, which can be divided into four groups: a first group a, a second group b and c, a third group a, b, and c, and a fourth group a , b, c, and d, respectively, corresponding to low, medium, high, and highest security levels.
  • the size of the resistance of the shunt element 1064 of each of the switch protection circuits 106 is different. Accordingly, the plurality of switch protection circuits 106 respectively have different security levels. In this way, the user can select different switch protection circuits 106 according to actual needs, so that different degrees of security protection can be obtained.
  • FIG. 3 shows a block diagram of a battery energy storage system of one embodiment of the present application.
  • the embodiment of the present application provides a battery energy storage system 300, including the power protection device 100 described in any of the embodiments of FIG. 1 and FIG. Therefore, the battery energy storage system 300 has the same technical effects as the power protection device 100 described in any of the embodiments of FIG. 1 and FIG. 2, and details are not described herein again.
  • FIG. 4 shows a block diagram of a powered device of one embodiment of the present application.
  • the embodiment of the present application provides an electrical device 400, including the power protection device 100 described in any of the embodiments of FIG. 1 and FIG. Therefore, the electrical device 400 has the same technical effects as the power protection device 100 described in any of the embodiments of FIG. 1 and FIG. 2, and details are not described herein again.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Protection Of Static Devices (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

L'invention concerne un dispositif de protection d'alimentation électrique (100), un système de stockage d'énergie de batterie (300) et un équipement électrique (400). Le dispositif de protection d'alimentation électrique (100) comprend : un dispositif d'alimentation électrique (102) ; un relais de commutation d'alimentation électrique (104), une première extrémité du relais de commutation d'alimentation électrique (104) se connectant à une extrémité de sortie du dispositif d'alimentation électrique (102), et la seconde extrémité se connectant à une charge ; un circuit de protection de commutateur (106) comprenant un commutateur de protection (1062) et un élément de dérivation (1064), le commutateur de protection (1062) se connectant en série à l'élément de dérivation (1064), une extrémité du commutateur de protection (1062) se connectant au relais de commutation d'alimentation électrique (104), l'autre extrémité du commutateur de protection (1062) se connectant à une extrémité de l'élément de dérivation (1064), et l'autre extrémité de l'élément de dérivation (1064) se connectant à la seconde extrémité du relais de commutation d'alimentation électrique (104). Ce dispositif de protection d'alimentation électrique (100) réduit le potentiel du relais de commutation d'alimentation électrique (104) à générer une adhérence, ce qui accroît la sécurité du dispositif d'alimentation électrique.
PCT/CN2017/093122 2017-05-25 2017-07-17 Dispositif de protection d'alimentation électrique, système de stockage d'énergie de batterie et équipement électrique WO2018214263A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201720591820.1 2017-05-25
CN201720591820.1U CN206727694U (zh) 2017-05-25 2017-05-25 供电保护装置、电池储能系统和用电设备

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WO2018214263A1 true WO2018214263A1 (fr) 2018-11-29

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WO (1) WO2018214263A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11088553B2 (en) * 2019-01-31 2021-08-10 Contemporary Amperex Technology Co., Limited Control system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110970961B (zh) * 2018-12-06 2021-06-08 宁德时代新能源科技股份有限公司 用电保护电路
CN113765086A (zh) * 2021-08-31 2021-12-07 赵忠扬 一种铝电解系列母线的直流大电流开关保护系统和方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101371325A (zh) * 2006-01-23 2009-02-18 西门子公司 扩展过载保护装置调节范围的方法、过载保护装置及其应用
CN101986491A (zh) * 2010-12-03 2011-03-16 安徽力高新能源技术有限公司 电器设备和继电器保护装置
CN102280865A (zh) * 2011-09-05 2011-12-14 湖南南车时代电动汽车股份有限公司 一种电动汽车接触器的保护方法及装置
CN106026229A (zh) * 2016-05-27 2016-10-12 宁德时代新能源科技股份有限公司 一种分流装置及其工作方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101371325A (zh) * 2006-01-23 2009-02-18 西门子公司 扩展过载保护装置调节范围的方法、过载保护装置及其应用
CN101986491A (zh) * 2010-12-03 2011-03-16 安徽力高新能源技术有限公司 电器设备和继电器保护装置
CN102280865A (zh) * 2011-09-05 2011-12-14 湖南南车时代电动汽车股份有限公司 一种电动汽车接触器的保护方法及装置
CN106026229A (zh) * 2016-05-27 2016-10-12 宁德时代新能源科技股份有限公司 一种分流装置及其工作方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11088553B2 (en) * 2019-01-31 2021-08-10 Contemporary Amperex Technology Co., Limited Control system

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