CN116191580A - Battery energy storage system - Google Patents

Battery energy storage system Download PDF

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Publication number
CN116191580A
CN116191580A CN202111427890.0A CN202111427890A CN116191580A CN 116191580 A CN116191580 A CN 116191580A CN 202111427890 A CN202111427890 A CN 202111427890A CN 116191580 A CN116191580 A CN 116191580A
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China
Prior art keywords
battery
energy storage
control
switch
modules
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Pending
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CN202111427890.0A
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Chinese (zh)
Inventor
周锡卫
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Individual
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Individual
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Priority to CN202111427890.0A priority Critical patent/CN116191580A/en
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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
    • H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • 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
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention provides a battery energy storage system, which aims at solving the problems that in the prior art, a battery pack series connection mode is fixed and the on-line control of the switching of a battery module is not realized, so that when great inconsistency and abnormality of battery parameters occur, a short plate effect with reduced efficiency is generated, safety control is inconvenient, and the automatic switching-in/off function is not realized except manual intervention. The battery monitoring module controls the switch driving circuit and the connected corresponding switch groups according to the control instruction of the battery energy storage unit system management device, so that the automatic switching control of the corresponding battery modules is realized, the fatal defect that a bypass switch and the battery modules are connected in parallel to generate an organization structure in the prior art is overcome, the automatic control of disengaging and cutting out the abnormal battery modules is realized, and the overall efficiency of the battery energy storage system is improved while the safety of the battery energy storage system is improved.

Description

Battery energy storage system
Technical Field
The invention belongs to the technical field of battery energy storage, and particularly relates to a battery energy storage system.
Background
Under the double-carbon target, the new energy power generation system is rapidly developed, meanwhile, the demand on the energy storage system is increasingly larger, the battery system is a main form widely applied at present, and the capacity and the scale demand of the energy storage system are also increased along with the increase of the new energy power. Therefore, the number of the battery modules and the number of the battery monomers adopted in the battery energy storage system are increased, and the requirements on the serial-parallel architecture design and the operation and maintenance of the battery modules are also increased when the battery energy storage system is formed.
The series-parallel connection of the traditional batteries usually adopts a fixed connection mode, and in the operation and maintenance, the defects that the batteries cannot be separated from connection independently after being connected exist, the short plate effect of reduced operation efficiency exists, the safety control is inconvenient, and the automatic connection/disconnection function is absent except manual intervention.
For this reason, the industry is actively researching corresponding solutions. The invention patent CN113315201 discloses a solution, but the technical scheme of the invention has serious defects. The main defects are: the battery management device according to claim 1, wherein the plurality of battery modules are connected in series and/or in parallel, the plurality of battery management devices are in one-to-one correspondence with the plurality of battery modules, and the battery management device is described as "…; the battery energy storage system of claim 3, wherein the switching circuit comprises: the bypass switch is connected with the corresponding battery module in parallel, and the disconnection switch is connected with the corresponding battery module in series, wherein when the bypass switch is in an open state and the disconnection switch is in a closed state, the battery module is connected with the battery energy storage system; when the bypass switch is in a closed state and the disconnection switch is in an open state, the battery module is separated from the battery energy storage system. "and descriptions of paragraphs 31, 32 and 33 of the specification of the present invention: the "switch circuit 201 includes a bypass switch connected in parallel with the corresponding battery module and a break switch connected in series with the corresponding battery module. When the bypass switch is in an open state and the disconnection switch is in a closed state, the battery module is connected to the energy storage system 100, and when the bypass switch is in a closed state and the disconnection switch is in an open state, the battery module is disconnected from the battery energy storage system 100."
The product architecture and the organization and connection relation of the components of the technical scheme have serious defects that: the bypass is closed to cause a plurality of parallel modules to generate a short circuit, and the short circuit is one of the most main reasons for causing explosion of the battery energy storage system, especially the lithium battery energy storage system, so the scheme adopts a framework and a connection mode of parallel connection of the bypass switch and the battery modules and is used for solving the technical means that the battery modules are separated from the battery energy storage system 100, unavoidable risks are generated and explosion is caused instantly, and the scheme has serious defects.
Disclosure of Invention
In order to overcome the serious defects of the prior art and overcome the defect that the prior art cannot be automatically disconnected after the batteries are connected, the invention provides a battery energy storage system which can overcome the fatal defects in the organization architecture of a bypass switch and a battery module in parallel, and can simply and conveniently realize the control of automatically disconnecting and cutting the abnormal battery module. The invention provides a battery energy storage system, which is characterized by comprising: the system comprises a plurality of battery modules, a plurality of switch groups, a plurality of battery monitoring modules, a switch group on-off control line, a battery monitoring sensor and wiring harness, a system management and control communication line, an energy storage converter, a battery energy storage unit system management device, a direct current connection busbar, a plurality of battery module arrays and a battery energy storage unit system; the switch groups correspond to the battery modules and are connected in series at two ends of the corresponding battery modules; the battery monitoring modules are connected with the corresponding switch groups through switch group on-off control lines and control the on-off of the corresponding switch groups; the battery monitoring modules are connected with the corresponding battery modules and each battery cell through the battery monitoring sensor and the wire harness, and are connected with the battery energy storage unit system management device through the system management communication line so as to switch and control the corresponding battery modules according to the control instruction of the battery energy storage unit system management device; the battery module is connected in parallel with the busbar through the corresponding switch groups to form a battery module array, the battery module arrays are connected in series and meet the voltage range of the direct current side of the energy storage converter, and the battery module arrays are connected to the direct current side of the energy storage converter and form a battery energy storage unit system together with the battery energy storage unit system management device.
The battery energy storage system is characterized in that each battery monitoring module of the plurality of battery monitoring modules comprises:
the battery parameter adopts a circuit, the battery parameter adopts a circuit to be respectively connected with each battery cell in the corresponding battery module through a battery monitoring sensor and a wire harness, and monitors the voltage and temperature parameters of the battery cell and the current parameter of the battery module through internal sampling signal conversion processing and a threshold circuit;
the switch driving circuit is connected with the corresponding switch group through a switch group on-off control line and used for performing switching control of switching on or isolation on the battery module;
the communication circuit is communicated with the battery energy storage unit system management device through a system management communication line;
the control circuit is connected with the battery parameter adoption circuit, the switch driving circuit and the communication circuit respectively and is used for receiving a control instruction of the battery energy storage unit system management device through the communication circuit and the system management communication line and controlling the switch driving circuit according to the control instruction so as to carry out switching management and control on corresponding battery modules.
The battery energy storage system is characterized in that each switch group in the plurality of switch groups consists of two switches, is respectively arranged at the positive electrode and the negative electrode connecting ends of the corresponding battery module, and is respectively connected between the positive electrode and the negative electrode of the battery module and the direct current connecting busbar.
The battery energy storage system is characterized in that each battery module of the plurality of battery modules is connected in series by a plurality of battery cells to form a battery module of a battery cell series group string.
The battery energy storage system is characterized in that a battery energy storage unit system management device is connected with an energy storage converter through a system management communication line to form a control path for power adjustment of the energy storage converter.
The invention provides a battery energy storage system, which aims at solving the problems that in the prior art, a battery pack series connection mode is fixed and the on-line control of the switching of a battery module is not realized, so that when great inconsistency and abnormality of battery parameters occur, a short plate effect with reduced efficiency is generated, safety control is inconvenient, and the automatic switching-in/off function is not realized except manual intervention. The invention adopts a plurality of switch groups, is respectively arranged at the positive electrode connecting end and the negative electrode connecting end of the corresponding battery module, is respectively connected between the direct current busbar at the positive electrode and the negative electrode connecting end of the battery module, receives the control instruction of the battery energy storage unit system management device through the system management communication line, and controls the switch driving circuit and the corresponding connected switch groups according to the control instruction, thereby realizing the switching control of the corresponding battery module, overcoming the fatal defect that the bypass switch and the battery module are connected in parallel to generate a tissue framework in the prior art, simultaneously realizing the independent control of disengaging and cutting the battery module which generates abnormality simply and conveniently, and improving the overall efficiency of the battery energy storage system while improving the safety of the battery energy storage system.
Drawings
Fig. 1 is a schematic block diagram of a battery energy storage system.
Detailed Description
As an example, a battery energy storage system is described with reference to the accompanying drawings, but the described embodiments are some, but not all, embodiments of the invention as applied to a battery energy storage system. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. The technique and scheme of the present invention are not limited to those given in the present embodiment example.
As shown in fig. 1, a battery energy storage system includes: the system comprises a plurality of battery modules (10), a plurality of switch groups (20), a plurality of battery monitoring modules (30), a switch group on-off control line (40), a battery monitoring sensor and wire harness (50), a system management communication line (60), an energy storage converter (70), a battery energy storage unit system management device (80), a direct current connection busbar (90), a plurality of battery module arrays (100) and a battery energy storage unit system (110); the plurality of switch groups (20) are in one-to-one correspondence with the plurality of battery modules and are connected in series at two ends of the corresponding battery modules; the battery monitoring modules (30) are connected with the corresponding switch groups (20) through switch group on-off control lines (40) and control the on-off of the corresponding switch groups; the battery monitoring modules (30) are connected with the corresponding battery modules (10) and each battery unit through the battery monitoring sensors and the wire harness (50), and the battery monitoring modules (30) are connected with the battery energy storage unit system management device (80) through the system management communication line (60) so as to switch and control the corresponding battery modules according to the control instructions of the battery energy storage unit system management device (80); the plurality of battery modules (10) are connected in parallel with the direct current connection busbar (90) through the corresponding plurality of switch groups (20) to form a battery module array (100), the plurality of battery module arrays (100) are connected in series and meet the voltage range of the direct current side of the energy storage converter (70), and are connected to the direct current side of the energy storage converter (70), and the battery module arrays and the battery energy storage unit system management device (80) form a battery energy storage unit system (110).
The battery energy storage system, wherein each battery monitoring module (30) of the plurality of battery monitoring modules (30) includes:
the battery parameter adopts a circuit, the battery parameter adopts the circuit to be respectively connected with each battery cell in the corresponding battery module (10) through a battery monitoring sensor and a wire harness (50), and monitors the voltage and temperature parameters of the battery cell and the current parameters of the battery module through internal sampling signal conversion processing and a threshold circuit;
the switch driving circuit is connected with the corresponding switch group (20) through a switch group on-off control line (40) and is used for performing switching control of switching on or isolation on the battery module;
a communication circuit that communicates with the battery energy storage unit system management device (80) through a system management communication line (60);
the control circuit is respectively connected with the battery parameter adoption circuit, the switch driving circuit and the communication circuit, and is used for receiving a control instruction of the battery energy storage unit system management device (80) through the communication circuit and the system management communication line (60), and controlling the switch driving circuit according to the control instruction so as to carry out switching management and control on corresponding battery modules.
The battery energy storage system is characterized in that each switch group in the plurality of switch groups (20) consists of two switches, is respectively arranged at the positive electrode and the negative electrode connecting ends of the corresponding battery module, and is respectively connected between the positive electrode and the negative electrode of the battery module and a direct current connecting busbar (90).
The battery energy storage system is characterized in that each battery module of the plurality of battery modules (10) is connected in series by a plurality of battery cells to form a battery module of a battery cell series group string.
The battery energy storage system is characterized in that a battery energy storage unit system management device (80) is connected with an energy storage converter (70) through a system management communication line (60) to form a control path for power adjustment of the energy storage converter.
The invention provides a battery energy storage system, which aims at solving the problems that in the prior art, a battery pack series connection mode is fixed and the on-line control of the switching of a battery module is not realized, so that when great inconsistency and abnormality of battery parameters occur, a short plate effect with reduced efficiency is generated, safety control is inconvenient, and the automatic switching-in/off function is not realized except manual intervention. The invention adopts a plurality of switch groups, is respectively arranged at the positive electrode connecting end and the negative electrode connecting end of the corresponding battery module, is respectively connected between the direct current busbar at the positive electrode and the negative electrode connecting end of the battery module, receives the control instruction of the battery energy storage unit system management device through the system management communication line, and controls the switch driving circuit and the corresponding connected switch groups according to the control instruction, thereby realizing the switching control of the corresponding battery module, overcoming the fatal defect that the bypass switch and the battery module are connected in parallel to generate a tissue framework in the prior art, simultaneously realizing the independent control of disengaging and cutting the battery module which generates abnormality simply and conveniently, and improving the overall efficiency of the battery energy storage system while improving the safety of the battery energy storage system.

Claims (5)

1. A battery energy storage system, comprising: the system comprises a plurality of battery modules, a plurality of switch groups, a plurality of battery monitoring modules, a switch group on-off control line, a battery monitoring sensor and wiring harness, a system management and control communication line, an energy storage converter, a battery energy storage unit system management device, a direct current connection busbar, a plurality of battery module arrays and a battery energy storage unit system; the switch groups are in one-to-one correspondence with the battery modules and are connected in series at two ends of the corresponding battery modules; the battery monitoring modules are connected with the corresponding switch groups through switch group on-off control lines and control the on-off of the corresponding switch groups; the battery monitoring modules are connected with the corresponding battery modules and each battery cell through the battery monitoring sensor and the wire harness, and are connected with the battery energy storage unit system management device through the system management communication line so as to switch and control the corresponding battery modules according to the control instruction of the battery energy storage unit system management device; the battery module arrays are connected in parallel through the corresponding switch groups and connected with the busbar in a direct current mode to form a battery module array, and the battery module arrays are connected in series and meet the voltage range of the direct current side of the energy storage converter and are connected into the direct current side of the energy storage converter to form a battery energy storage unit system.
2. The battery energy storage system of claim 1, wherein each of the plurality of battery monitoring modules comprises:
the battery parameter adopts a circuit, the battery parameter adopts a circuit to be respectively connected with each battery cell in the corresponding battery module through a battery monitoring sensor and a wire harness, and monitors the voltage and temperature parameters of the battery cell and the current parameter of the battery module through internal sampling signal conversion processing and a threshold circuit;
the switch driving circuit is connected with the corresponding switch group through a switch group on-off control line and used for performing switching control of switching on or isolation on the battery module;
the communication circuit is communicated with the battery energy storage unit system management device through a system management communication line;
the control circuit is connected with the battery parameter adoption circuit, the switch driving circuit and the communication circuit respectively and is used for receiving a control instruction of the battery energy storage unit system management device through the communication circuit and the system management communication line and controlling the switch driving circuit according to the control instruction so as to carry out switching management and control on corresponding battery modules.
3. The battery energy storage system of claim 1, wherein each of the plurality of switch sets is composed of two switches, and is respectively mounted at the positive and negative connection ends of the corresponding battery module, and is respectively connected between the positive and negative ends of the corresponding battery module and the direct current connection busbar.
4. The battery energy storage system of claim 1, wherein each of the plurality of battery modules is connected in series by a plurality of battery cells, constituting a series string of battery cells.
5. The battery energy storage system according to claim 1, wherein the battery energy storage unit system management device is connected to the energy storage converter through a system management communication line to form a control path for power adjustment of the energy storage converter.
CN202111427890.0A 2021-11-29 2021-11-29 Battery energy storage system Pending CN116191580A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111427890.0A CN116191580A (en) 2021-11-29 2021-11-29 Battery energy storage system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111427890.0A CN116191580A (en) 2021-11-29 2021-11-29 Battery energy storage system

Publications (1)

Publication Number Publication Date
CN116191580A true CN116191580A (en) 2023-05-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111427890.0A Pending CN116191580A (en) 2021-11-29 2021-11-29 Battery energy storage system

Country Status (1)

Country Link
CN (1) CN116191580A (en)

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