CN112829626A - Energy storage charging and battery replacing system - Google Patents

Energy storage charging and battery replacing system Download PDF

Info

Publication number
CN112829626A
CN112829626A CN202110250230.3A CN202110250230A CN112829626A CN 112829626 A CN112829626 A CN 112829626A CN 202110250230 A CN202110250230 A CN 202110250230A CN 112829626 A CN112829626 A CN 112829626A
Authority
CN
China
Prior art keywords
energy storage
storage battery
battery
power
conversion unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110250230.3A
Other languages
Chinese (zh)
Inventor
张华建
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Ying Fei Amperex Technology Ltd
Inventronics Hangzhou Co Ltd
Original Assignee
Zhejiang Ying Fei Amperex Technology Ltd
Inventronics Hangzhou Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Ying Fei Amperex Technology Ltd, Inventronics Hangzhou Co Ltd filed Critical Zhejiang Ying Fei Amperex Technology Ltd
Priority to CN202110250230.3A priority Critical patent/CN112829626A/en
Publication of CN112829626A publication Critical patent/CN112829626A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • B60L53/62—Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • B60L53/64—Optimising energy costs, e.g. responding to electricity rates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/80—Exchanging energy storage elements, e.g. removable batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations

Abstract

The application discloses energy storage battery charging and replacing system, including the AC/DC conversion unit who is connected with the electric wire netting, the switch element who is connected with AC/DC conversion unit, energy storage battery control unit and DC/DC conversion unit who is connected with the switch element, control unit is used for under the circumstances of millet electric time quantum, thereby make the electric wire netting be connected with energy storage battery and realize that the electric wire netting charges to energy storage battery through control switch unit, under the circumstances of off-millet electric time quantum, thereby make energy storage battery be connected with power battery through control switch unit and realize that energy storage battery supplies power to power battery. Because the control unit can control the energy storage battery to charge in the valley electricity time period and supply power to the power battery through the energy storage battery in the non-valley electricity time period, the charging and replacing system can store the energy of the power grid to the energy storage battery in the valley electricity time period and supply power by the energy storage battery in the non-valley electricity time period, and therefore the power consumption cost of the energy storage charging and replacing system is reduced.

Description

Energy storage charging and battery replacing system
Technical Field
The application relates to the technical field of power electronics, in particular to an energy storage charging and battery replacing system.
Background
With the development of science and technology, new energy electric vehicles are becoming the key points of the automobile industry and energy development gradually as a model for the use of clean energy, and also becoming more important components in human daily life gradually.
At present, a charging and replacing system for supplying power to a new energy electric automobile mainly charges the new energy electric automobile by depending on electric energy of a power grid. And because the charging and replacing system can not supply power to the new energy electric automobile according to the peak-to-valley power rule, the charging and replacing system often supplies power to the new energy electric automobile by a power grid in a peak power time period, so that the power consumption cost is high.
Therefore, how to reduce the electricity consumption cost is an urgent problem to be solved by those skilled in the art.
Disclosure of Invention
The application aims to provide an energy storage charging and replacing system for reducing electricity consumption cost.
In order to solve the above technical problem, the present application provides an energy storage charging and battery replacing system, including: the system comprises an AC/DC conversion unit connected with a power grid, a switch unit connected with the AC/DC conversion unit, an energy storage battery connected with the switch unit, a control unit and a DC/DC conversion unit;
the control unit is used for controlling the switch unit to enable the power grid to charge the energy storage battery through the AC/DC conversion unit under the condition of a valley power time period, wherein the output end of the AC/DC conversion unit can meet the charging requirement of the energy storage battery;
the control unit is further used for controlling the switch unit to enable the energy storage battery to charge the power battery through the DC/DC conversion unit under the condition of off-valley electricity time period, wherein the output end of the DC/DC conversion unit can meet the charging requirement of the power battery.
Preferably, the control unit is further configured to control the switch unit to enable the AC/DC conversion unit to charge the power battery through the power grid when the energy storage battery does not meet a preset condition.
Preferably, the switch unit includes a first switch group and a second switch group, the first switch group is connected with the energy storage battery, and the second switch group is connected with the power battery.
Preferably, the energy storage battery includes a plurality of energy storage battery packs, the switches in the first switch group are multiple and correspond to the energy storage battery packs one to one, the second ends of the switches are respectively connected to the energy storage battery packs correspondingly, and the first ends of the switches are connected to the AC/DC conversion unit and the DC/DC conversion unit after being connected to each other.
Preferably, the control unit is further configured to select a target energy storage battery pack that is most matched with the power battery according to preset parameters under the condition that the energy storage battery is used for charging the power battery, and control the target energy storage battery pack to charge the power battery through a switch in the first switch group that corresponds to the target energy storage battery pack.
Preferably, the AC/DC conversion unit and the DC/DC conversion unit are respectively connected to the control unit, and the control unit is further configured to control the AC/DC conversion unit to operate and control the DC/DC conversion unit to not operate when the power grid charges the energy storage battery, and control the AC/DC conversion unit to not operate and control the DC/DC conversion unit to operate when the energy storage battery charges the power battery.
Preferably, the preset parameter is one or more of the voltage of the energy storage battery, the voltage of the power battery, the discharge current of the energy storage battery, and the battery capacity of the energy storage battery.
Preferably, each switch in the first switch group is a bidirectional conducting switch.
Preferably, the preset condition is that the energy storage battery works normally or the electric quantity of the energy storage battery meets the required electric quantity of the power battery.
Preferably, the charging requirement of the energy storage battery and/or the charging requirement of the power battery are specifically as follows: the voltage and/or current are output according to the required charging parameters of the BMS.
The application provides an energy storage battery charging and replacing system, including the AC/DC conversion unit who is connected with the electric wire netting, the switch element who is connected with AC/DC conversion unit, energy storage battery control unit and DC/DC conversion unit who is connected with the switch element, control unit is used for under the circumstances of millet electric time quantum, thereby make the electric wire netting be connected with energy storage battery and realize that the electric wire netting charges to energy storage battery through control switch unit, under the circumstances of off-millet electric time quantum, thereby make energy storage battery and power battery be connected and realize that energy storage battery supplies power to power battery through control switch unit. Because the control unit can control the energy storage battery to charge in the valley electricity time period and supply power to the power battery through the energy storage battery in the non-valley electricity time period, the charging and replacing system can store the energy of the power grid to the energy storage battery in the valley electricity time period and supply power by the energy storage battery in the non-valley electricity time period, and therefore the power consumption cost of the energy storage charging and replacing system is reduced.
In the traditional electric vehicle energy storage charging and replacing system, all energy of a power grid is transferred to a bus through an AC/DC conversion unit, so that the AC/DC conversion unit becomes the bottleneck of system reliability, and once the system is damaged, the system cannot work. The system is a distributed system, namely a power grid supplies power through the AC/DC conversion unit, the energy storage device can supply power, the damage of any unit does not influence the normal work of other units, and the reliability of the scheme is higher.
In the prior art, although an energy storage device is provided, the following disadvantages are provided: the energy of the power grid is converted into the energy storage battery through AC/DC conversion, and the energy of the power grid is supplied to the battery to be charged through DC/DC conversion twice when the energy storage battery is discharged; the energy is converted for three times, and the charging efficiency is low. The energy of the power grid can be charged into the energy storage battery through AC/DC conversion, and the energy storage battery can be charged into the battery replacement battery or the power battery of the electric vehicle through DC/DC conversion once, so that the system efficiency is improved.
Compared with the prior art, each rechargeable battery unit can save one set of DC/DC circuit, and the cost is lower.
The invention can charge the energy storage battery with one AC/DC, and the system cost is further reduced.
In a traditional energy storage charging and battery replacing system, when energy storage battery packs are charged or discharged, all the battery packs are connected in parallel, the voltage of all the batteries in the battery packs needs to be ensured to be the same, and the maintenance cost is high. The batteries in the invention are not connected in parallel, so that battery screening is not needed, and the requirement on the use of the batteries (especially when the energy storage batteries are used as the batteries of retired electric automobiles) is greatly reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application, the drawings needed for the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained by those skilled in the art without inventive effort.
Fig. 1 is a schematic structural diagram of an energy storage charging and battery replacing system according to an embodiment of the present disclosure;
fig. 2 is a circuit diagram of an energy storage charging and battery replacing system according to an embodiment of the present disclosure;
fig. 3 is a circuit diagram of a DC/DC conversion unit according to an embodiment of the present application;
fig. 4 is a circuit diagram of another energy storage charging and replacing system according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the present application.
The core of the application is to provide an energy storage charging and battery replacing system for reducing the electricity consumption cost. The core of the application is to further provide a charging and battery replacing method, device and medium based on the electric vehicle.
In order that those skilled in the art will better understand the disclosure, the following detailed description will be given with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of an energy storage charging and battery replacing system provided in an embodiment of the present application. As shown in fig. 1, the system includes: a switching unit 11 connected to the power grid, an energy storage battery 13 connected to the switching unit 11, and a control unit 15 connected to the switching unit 11.
And the control unit 15 is used for enabling the power grid to charge the energy storage battery 13 through controlling the switch unit 11 in the case of the valley power time period, and enabling the energy storage battery 13 to charge the power battery 14 through controlling the switch unit 11 in the case of the non-valley power time period.
In the embodiment of the application, the valley power time period is a municipal specified valley power time period, and the non-valley power time period is a municipal specified non-valley power time period. It will be appreciated that the off-valley and off-valley periods may vary as municipality regulations change.
It should be noted that, in the battery replacement station, the power battery 14 is a battery replacement battery for quickly replacing the electric vehicle; in the charging station, the power battery 14 refers to a battery in an electric vehicle. In addition, the energy storage battery 13 may be a completely new battery purchased separately, or may be a power battery for decommissioning the electric vehicle.
As shown in fig. 1, the energy storage charging and battery replacing system further includes: the power supply system comprises an AC/DC conversion unit 10 and a DC/DC conversion unit 12, wherein the input end of the AC/DC conversion unit 10 is connected with a power grid, the output end of the AC/DC conversion unit 10 is connected with a switch unit 11, the input end of the DC/DC conversion unit 12 is connected with the switch unit 11, and the output end of a DC/DC conversion unit 15 is connected with a power battery 14.
Then, the control unit 15 is configured to control the switch unit 11 to enable the grid to charge the energy storage battery 13 through the AC/DC conversion unit 10 in case of a valley period, and to enable the energy storage battery 13 to charge the power battery 14 through the DC/DC conversion unit 12 in case of a non-valley period.
The AC/DC conversion unit 10 is configured to convert, when the energy storage battery 13 is charged by the power grid, output alternating current of the power grid into direct current that can meet the charging requirement of the energy storage battery 13, so that the power grid supplies power to the energy storage battery 13 through the AC/DC conversion unit 10.
The DC/DC conversion unit 12 is configured to, when the energy storage battery 13 charges the power battery 14, convert the output direct current of the energy storage battery 13 into a direct current capable of meeting the charging requirement of the power battery 14, so that the energy storage battery 13 charges the power battery 14 through the DC/DC conversion unit 12.
In order to prevent the AC/DC converting unit 10 and the DC/DC converting unit 15 from continuously operating, which results in unnecessary consumption of the input voltage of the power grid, and to prevent the power grid from supplying power to the power battery 14 when the energy storage battery 13 supplies power to the power battery 14, in a specific implementation, the control unit 15 may be further connected to the AC/DC converting unit 10 and the DC/DC converting unit 15, and configured to control the AC/DC converting unit 10 to operate and the DC/DC converting unit 15 to not operate when the energy storage battery 13 is connected to the power grid, and to control the AC/DC converting unit 10 to not operate and the DC/DC converting unit 15 to operate when the energy storage battery 13 is connected to the power battery 14.
Fig. 2 is a circuit diagram of an energy storage charging and battery replacing system according to an embodiment of the present application. As shown in fig. 2, the switching unit 11 includes a first switching group 20 and a second switching group 21. The first switch group 20 is connected with the energy storage battery 13, and the second switch group 21 is connected with the power battery 14.
In a specific implementation, the control module is configured to, in a valley power time period, control the AC/DC conversion unit 10 to start operating, close the first switch group 20, and open the second switch group 21, so as to ensure that the power grid charges the energy storage battery 13 through the AC/DC conversion unit 10, and in a non-valley power time period, control the AC/DC conversion unit 10 to stop operating, close the first switch group 20, and open the second switch group 21, so as to ensure that the energy storage battery 13 supplies power to the power battery 14 through the DC/DC conversion unit 12.
It should be noted that, in order to ensure that the first switch group 20 can communicate both the AC/DC conversion unit 10 and the energy storage battery 13, and communicate the energy storage battery 13 and the DC/DC conversion unit 12, as a preferred embodiment, the switches in the first switch group 20 are all bidirectional conducting switches.
It is understood that the switches included in the second switch group 21 may be bidirectional conducting switches or unidirectional conducting switches.
In addition, in the specific implementation, the AC/DC conversion unit 10 is used for converting the input signal of the power grid into the input current or voltage of the energy storage Battery 13 and/or the power Battery 14 meeting the requirements of a Battery Management System (BMS).
Fig. 3 is a circuit diagram of a DC/DC conversion unit according to an embodiment of the present application. As shown in fig. 3, the DC/DC conversion unit includes a first inductor L1, a second inductor L2, a switch K1, a switch K2, a capacitor C, and a diode D1. The first end of the first inductor L1 is connected to the AC/DC conversion unit 10 and the first end of the second switch group 21, the second end of the first inductor L1 is connected to the first end of the switch K1 and the first end of the switch K2, the second end of the switch K1 is grounded, the second end of the switch K2 is connected to the first end of the second inductor L2 and the cathode of the diode D1, the anode of the diode D1 is grounded, the second end of the second inductor L2 is connected to the power battery, the first end of the capacitor C and the second end of the second switch group 21, and the second end of the capacitor C is grounded. In addition, in the specific implementation, the control unit 15 may be further connected to third terminals of the switches K1 and K2 to control opening and closing of the switches K1 and K2.
It is to be understood that fig. 3 is a circuit diagram of a DC/DC converting unit 12 provided on the basis of a step-up/step-down circuit, and the DC/DC converting unit 12 may also be a separate step-up circuit or a separate step-down circuit.
The energy storage charging and replacing system comprises an AC/DC conversion unit connected with a power grid, a switch unit connected with the AC/DC conversion unit, an energy storage battery control unit connected with the switch unit and a DC/DC conversion unit, wherein the control unit is used for controlling the switch unit to enable the power grid to be connected with an energy storage battery to charge the energy storage battery under the condition of a valley power time period, and controlling the switch unit to enable the energy storage battery to be connected with a power battery to enable the energy storage battery to supply power to the power battery under the condition of a non-valley power time period. Because the control unit can control the energy storage battery to charge in the valley electricity time period and supply power to the power battery through the energy storage battery in the non-valley electricity time period, the charging and replacing system can store the energy of the power grid to the energy storage battery in the valley electricity time period and supply power by the energy storage battery in the non-valley electricity time period, and therefore the power consumption cost of the energy storage charging and replacing system is reduced.
In the traditional electric vehicle energy storage charging and replacing system, all energy of a power grid is transferred to a bus through an AC/DC conversion unit, so that the AC/DC conversion unit becomes the bottleneck of system reliability, and once the system is damaged, the system cannot work. The system is a distributed system, namely a power grid supplies power through the AC/DC conversion unit, the energy storage device can supply power, the damage of any unit does not influence the normal work of other units, and the reliability of the scheme is higher.
In the prior art, although an energy storage device is provided, the following disadvantages are provided: the energy of the power grid is converted into the energy storage battery through AC/DC conversion, and the energy of the power grid is supplied to the battery to be charged through DC/DC conversion twice when the energy storage battery is discharged; the energy is converted for three times, and the charging efficiency is low. The energy of the power grid can be charged into the energy storage battery through AC/DC conversion, and the energy storage battery can be charged into the battery replacement battery or the power battery of the electric vehicle through DC/DC conversion once, so that the system efficiency is improved.
Compared with the prior art, each rechargeable battery unit can save one set of DC/DC circuit, and the cost is lower.
The invention can charge the energy storage battery with one AC/DC, and the system cost is further reduced.
In a traditional energy storage charging and battery replacing system, when energy storage battery packs are charged or discharged, all the battery packs are connected in parallel, the voltage of all the batteries in the battery packs needs to be ensured to be the same, and the maintenance cost is high. The batteries in the invention are not connected in parallel, so that battery screening is not needed, and the requirement on the use of the batteries (especially when the energy storage batteries are used as the batteries of retired electric automobiles) is greatly reduced.
On the basis of the above embodiment, the control unit 15 is further configured to control the power grid to charge the power battery 14 through the switch unit 11 if the energy storage battery 13 does not meet the preset condition.
The preset condition is that the energy storage battery 13 works normally or the electric quantity of the energy storage battery 13 meets the required electric quantity of the power battery 14.
It can be understood that, when the electric quantity of the energy storage battery 13 cannot meet the requirement for charging the power battery 14, or the energy storage battery 13 works abnormally, the control unit 15 may also control the switch unit 11 to enable the power grid to charge the power battery 14 through the AC/DC conversion unit 10, so as to ensure that the power battery 14 can be normally charged, thereby ensuring the user experience.
As shown in fig. 2, based on the above embodiment, the energy storage battery 13 includes n energy storage battery packs (where n is a positive integer), the plurality of switches in the first switch group 20 are in one-to-one correspondence with the energy storage battery packs, the second ends of the switches are respectively connected to the energy storage battery packs, and the first ends of the switches are connected to the AC/DC conversion unit 10 and the DC/DC conversion unit 12 after being connected to each other.
It is understood that when the switches in the first switch group 20 are closed, the energy storage battery packs can be charged simultaneously.
In order to improve the working efficiency of the energy storage charging and battery replacing system, as a preferred embodiment, the control unit 15 is further configured to select a target energy storage battery pack that is most matched with the power battery 14 according to preset parameters when the energy storage battery 13 charges the power battery 14, and control the target energy storage battery pack to charge the power battery 14 through a switch in the first switch group 20 corresponding to the target energy storage battery pack.
It should be noted that the preset parameter is one or more of the voltage of the energy storage battery 13, the voltage of the power battery 14, the discharge current of the energy storage battery 13, and the battery capacity of the energy storage battery 13.
In addition, in order to further improve the working efficiency of the energy storage charging and battery replacing system, in the process of charging the power battery 14 by the energy storage battery 13, the control unit 15 is further configured to select the target energy storage battery pack that is most matched with the power battery 14 again according to the preset parameters under the condition that the target energy storage battery does not meet the preset requirements.
It can be understood that, in the process of charging the power battery 14 by the energy storage battery 13, whether the electric quantity of the target energy storage battery meets the preset requirement is monitored according to a preset period or in real time, and once the electric quantity of the target energy storage battery does not meet the preset requirement, the energy storage battery most matched with the power battery 14 can be reselected.
The energy storage is filled and is traded electric system that this application embodiment provided because the energy storage battery includes a plurality of energy storage battery package, consequently can guarantee the enough power battery's of the energy of storage in the storage battery use, avoided the problem that the demand electric quantity of power battery can not be satisfied in the storage electric quantity of off-peak electricity time quantum energy storage battery, further reduced the power cost that the energy storage was filled and is traded electric system.
Fig. 4 is a circuit diagram of another energy storage charging and replacing system according to an embodiment of the present application. As shown in fig. 4, in addition to the above embodiment, the number of the power batteries 14 is n (where n is a positive integer), where the number of the DC/DC conversion units 12 matches the number of the power batteries 14, the second ends of the switches in the second switch group 21 are respectively connected to the power batteries 14, the first ends of the switches in the second switch group 21 are connected to the AC/DC conversion unit 10 after being connected to each other, and the DC/DC conversion units 12 are connected in parallel to the switches in the second switch group 21.
In the embodiment of the present application, when the energy storage battery 13 charges the power battery 14 through the DC/DC conversion unit 12, the control unit 15 may simultaneously control the switches in the second switch group 21 to be closed, so as to simultaneously charge the power batteries 14; when the power grid charges the power batteries 14 through the AC/DC conversion unit 10, only one power battery 14 is charged in the same time period, that is, the control unit 15 controls only one switch in the second switch group 21 to be closed in the same time period.
It can be understood that, because the energy storage battery 13 can charge a plurality of power batteries 14 at the same time, the charging efficiency of the power batteries 14 can be increased, and the speed of supplying power to the power batteries 14 by the energy storage battery 13 is increased.
The energy storage charging and battery replacing system provided by the application is described in detail above. The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Claims (10)

1. An energy storage charging and battery replacing system, comprising: the system comprises an AC/DC conversion unit connected with a power grid, a switch unit connected with the AC/DC conversion unit, an energy storage battery connected with the switch unit, a control unit and a DC/DC conversion unit;
the control unit is used for controlling the switch unit to enable a power grid to charge the energy storage battery through the AC/DC conversion unit under the condition of a valley power time period, wherein the output end of the AC/DC conversion unit can meet the charging requirement of the energy storage battery;
the control unit is further used for controlling the switch unit to enable the energy storage battery to charge the power battery through the DC/DC conversion unit under the condition of off-valley electricity time period, wherein the output end of the DC/DC conversion unit can meet the charging requirement of the power battery.
2. The energy storage battery charging and replacing system according to claim 1, wherein the control unit is further configured to control the switch unit to enable a power grid to charge the power battery through the AC/DC conversion unit when the energy storage battery does not meet a preset condition.
3. The energy storage charging and replacing system as claimed in claim 1, wherein the switch unit comprises a first switch group and a second switch group, the first switch group is connected with the energy storage battery, and the second switch group is connected with the power battery.
4. The energy storage battery charging and replacing system as claimed in claim 3, wherein the energy storage battery includes a plurality of energy storage battery packs, the switches in the first switch group are plural and correspond to the energy storage battery packs one to one, the second ends of the switches are respectively connected to the energy storage battery packs, and the first ends of the switches are connected to the AC/DC conversion unit and the DC/DC conversion unit after being connected to each other.
5. The energy storage charging and replacing system as claimed in claim 4, wherein the control unit is further configured to select a target energy storage battery pack that is most matched with the power battery according to preset parameters when the energy storage battery charges the power battery, and control the target energy storage battery pack to charge the power battery through a switch in the first switch group that corresponds to the target energy storage battery pack.
6. The energy storage charging and replacing system according to claim 1, wherein the AC/DC conversion unit and the DC/DC conversion unit are respectively connected to the control unit, and the control unit is further configured to control the AC/DC conversion unit to operate and the DC/DC conversion unit to not operate when the power grid charges the energy storage battery, and control the AC/DC conversion unit to not operate and the DC/DC conversion unit to operate when the energy storage battery charges the power battery.
7. The energy storage battery charging and replacing system according to claim 5, wherein the preset parameter is one or more of a voltage of the energy storage battery, a voltage of the power battery, a discharge current of the energy storage battery, and a battery capacity of the energy storage battery.
8. The energy storage charging and replacing system as claimed in claim 3 or 4, wherein each switch in the first switch group is a bidirectional conducting switch.
9. The energy storage battery charging and replacing system according to claim 2, wherein the preset condition is that the energy storage battery works normally or the electric quantity of the energy storage battery meets the required electric quantity of the power battery.
10. The energy storage charging system according to claim 1, wherein the charging requirement of the energy storage battery and/or the charging requirement of the power battery are/is specifically: the voltage and/or current are output according to the required charging parameters of the BMS.
CN202110250230.3A 2021-03-08 2021-03-08 Energy storage charging and battery replacing system Pending CN112829626A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110250230.3A CN112829626A (en) 2021-03-08 2021-03-08 Energy storage charging and battery replacing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110250230.3A CN112829626A (en) 2021-03-08 2021-03-08 Energy storage charging and battery replacing system

Publications (1)

Publication Number Publication Date
CN112829626A true CN112829626A (en) 2021-05-25

Family

ID=75929810

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110250230.3A Pending CN112829626A (en) 2021-03-08 2021-03-08 Energy storage charging and battery replacing system

Country Status (1)

Country Link
CN (1) CN112829626A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116137940A (en) * 2021-09-18 2023-05-19 宁德时代新能源科技股份有限公司 Charging method, charging device and charging system of power battery

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116137940A (en) * 2021-09-18 2023-05-19 宁德时代新能源科技股份有限公司 Charging method, charging device and charging system of power battery
CN116137940B (en) * 2021-09-18 2024-02-20 宁德时代新能源科技股份有限公司 Charging method, charging device and charging system of power battery

Similar Documents

Publication Publication Date Title
CN107804326B (en) Traction motor power supply system and electric locomotive power supply equipment
CN113119770A (en) Charging and battery replacing system
CN203491707U (en) Energy storage system based on cascade utilization of power battery
KR20200048913A (en) Stand-alone household energy storage system based on waste battery
JP2012228027A (en) Dc power feeding system and control method of the same
CN109768561A (en) A kind of Control of Electric Vehicles method and system
CN106059046A (en) Combined emergency guarantee power source and power supply method thereof
CN112653201A (en) Energy supply scheme configuration system and method based on intelligent park multi-energy complementation
KR101437349B1 (en) Charging power feeding system for ev charging infra based on multi function energy storage system of railway traction system
CN208272645U (en) Electric car changes the transmission system of electricity and energy storage station
CN114583730A (en) System and method for peak clipping, valley filling and energy storage management of communication base station
CN112829626A (en) Energy storage charging and battery replacing system
CN102457101A (en) Battery backup supply unit
CN212304790U (en) Vehicle-mounted micro-grid with solar panel and power plant formed by polymerizing same
US20180233929A1 (en) Battery to battery charger using asymmetric batteries
CN210430931U (en) Energy storage air conditioning system
CN218287481U (en) Energy storage charging and battery replacing system
KR102386233B1 (en) Apparatus for storing emergency power using recycled batteries
CN215621502U (en) Energy storage charging and battery replacing system
CN214874280U (en) Charging and battery replacing system
CN114937985A (en) Power supply system
CN214874279U (en) Charging and battery replacing system
Momayyezan et al. A new multiple converter topology for battery/ultracapacitor hybrid energy system
CN215646326U (en) Energy storage charging and battery replacing system
CN202042930U (en) Battery management system for solar air conditioner

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination