CN108376806A - A kind of low cost solves the protection system of current-carrying hidden danger on cell parallel circuit - Google Patents
A kind of low cost solves the protection system of current-carrying hidden danger on cell parallel circuit Download PDFInfo
- Publication number
- CN108376806A CN108376806A CN201810109175.4A CN201810109175A CN108376806A CN 108376806 A CN108376806 A CN 108376806A CN 201810109175 A CN201810109175 A CN 201810109175A CN 108376806 A CN108376806 A CN 108376806A
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- CN
- China
- Prior art keywords
- current
- carrying
- battery
- management system
- module
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- 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.)
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Classifications
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- 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
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
-
- 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
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
-
- 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
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses the protection systems that a kind of low cost solves current-carrying hidden danger on cell parallel circuit; its protection system is made of power battery pack, temperature control system and battery management system; power battery pack is made of M*N standard single battery module; N number of monocell modules in parallel is connected using conducting wire between each monocell module.The present invention both need not install BMS on each road, also big current-carrying capacity need not be used is connected in parallel device, only being connected in parallel device and can prevent the overcurrent risk of parallel branch with a set of BMS and small current-carrying capacity, application cost substantially reduces, and the connection state of the mechanical tie point of series connection can be detected, the problem of can avoid the security risk caused by the mechanical tie point of series connection loosens, the temperature change of parallel branch is monitored simultaneously, can solve the problems, such as intermodule parallel branch current run-away that may be present in parallel.
Description
Technical field
The present invention relates to li-ion cell protection technical field, it is hidden that specially a kind of low cost solves current-carrying on cell parallel circuit
The protection system of trouble.
Background technology
It is used for the lithium electric power battery pack of electric vehicle or energy-storage system in the market, is generally made of many single modules,
Capacity is designed needed for each system of the module capacity according to practical application, due to capacity needed for electric vehicle or energy-storage system
Generally all in 100AH or more, required single module capacity is bigger, it is contemplated that single module weight reasons, in each module
Serial number is few, and general 1~2 string does not exceed 3 strings at most, and then individual module voltage is low.This single module is lacked there are following
Point：1, poor universality：Single module capacity is big and nonstandard customization, the system that can be only applied to identical capacity requirement, different capabilities
System need to develop module and its respective accessory again；2, production cost is high：Poor universality, different capabilities system need to again be developed not
With module and its corresponding accessory, cause development cost high, and material variety is multiplied in production process, leads to stock material
It is of high cost；3, it is small to recycle range：When system is recycled, general low-pressure system 48V/60V is relatively more, 3.6V/
7.2V voltage rating systems use fewer so that the scope of application of its single module is especially narrow；4, module mechanical series point is more：
Security risk is big, and single module voltage is low, needs many modules to be connected in series with by way of mechanical fasteners, is mechanically connected
Point is more, and corresponding connection reliability is poorer；5, single module current-carrying capacity is big：Current-carrying reliability requirement is high, electric current needed for system by
Each single module provides, bigger per module current-carrying capacity, and to converging accordingly, interface unit current-carrying capability requires height, once wherein have
Current-carrying capacity part occurs, then other current-carrying parts of whole system can generate heat than more serious, and superheating phenomenon easily occurs, or even cause to pacify
Full accident.Electrokinetic cell system connects to solve by the single module multi-parallel of low capacity mostly string number less, but is deposited after parallel connection
In certain problem：For example, as shown in Figure 1, battery 1,4,2,5,3,6 is connected in parallel by figure bunchiness, it is assumed that Suo Youdan
Body battery indifference and be connected in series with conductive line resistance values be 0, under normal circumstances, electric current is 10A on every main line, then parallel branch
Equal no current passes through on AB and BC, the frequency used with system and time, and the performance difference of battery can be highlighted slowly, it is assumed that pole
In the case of end, No. 3 internal resistance of single cell value infinities can not discharge completely, and No. 3 batteries are considered as with open circuit at this time, as shown in Fig. 2,
15A is become by the electric current of battery 1,2 at this time, and parallel branch AB electric current 5A, parallel branch BC electric currents reach 10A, this is
Illustrate 3 series-parallel situations, if the parallel connection more gone here and there, under extreme case the electric current of parallel branch will bigger, in order to solve
Problems, it will usually which the current-carrying capability for increasing parallel branch connector designs its current-carrying capability by extreme case, but connects simultaneously
Fitting weight is big, of high cost, practicability is not strong.
Invention content
The purpose of the present invention is to provide the protection system that a kind of low cost solves current-carrying hidden danger on cell parallel circuit, with
Solve the problems mentioned above in the background art.
To achieve the above object, the present invention provides the following technical solutions：It uploads in a kind of low cost solution cell parallel circuit
The protection system of hidden danger is flowed, protection system is made of power battery pack, temperature control system and battery management system, power battery pack
It is made of M*N standard single battery module, N number of monocell modules in parallel, is connected using conducting wire between each monocell module,
It is connected to monocell group management system, such as single battery module M/1 and M/ by RS485 communication modes and voltage acquisition conducting wire
Conducting wire connects between 2, and M/1 and M/2 are communicatively connected to monocell group management system M by RS485, and so on；M
N number of monocell modules in parallel body of going here and there is connected by big current-carrying copper bar again, such as single battery module M/1 and single battery module M-
It is connected by big current-carrying copper bar between 1/1, passes through big current-carrying copper between single battery module M/2 and single battery module M-1/2
Row's connection, and so on；M monocell group management system is connected to battery management system by RS485 or CAN communication mode
Main control unit, battery management system main control unit pass through RS485 or CAN communication, battery management system master with electricity consumption/charhing unit
It controls unit and collects M single battery group management system related information, and ought wherein have monomer battery voltage too low excessively high or exist and carry
When flowing hidden danger, battery management system main control unit is notified that electricity consumption/charhing unit reduces electric current input/output ability, cuts off phase
Single battery module electric current input/output is closed, to prevent the serious security risk of copper bar current-carrying overload fever from occurring.
Preferably, the single battery module is by N*R strings and battery pack, temperature collecting cell, temperature conditioning unit, charge control
The compositions such as MOS and current acquisition unit, go here and there and battery pack is composed in series by N number of R single battery parallel connection module, with 48/
Based on 60V 20AH battery systems, it is primarily used to form standard module.
Preferably, the temperature control system is made of temperature monitoring unit and control unit, takes precautions against current-carrying hidden danger safety in parallel,
It is made of n+1 temperature sensor, i.e. T0~Tn, acquires R single battery connecting copper bar electric current, for example Tn mainly acquires the
N series windings connect R single battery copper bar temperature, and when T is more than that fiducial temperature T ' sets numerical value, temperature conditioning unit cuts off charge and discharge MOS,
And inform monocell group management system and battery management system main control unit, power output drops in system, passes through J1 connectors and phase
Adjacent single battery modules in parallel, DC+ connect upper level single battery module by copper bar, and DC- connects next stage list by copper bar
A battery modules.
Preferably, the battery management system is made of voltage acquisition unit and balanced unit, and voltage acquisition unit is main
Monitoring monomer battery voltage in parallel, balanced unit is using passive equal balance system.
Preferably, the power battery pack maximum current-carrying capability of working as is I, when M/1 generations are over-pressed, under-voltage or current-carrying is hidden safely
When suffering from, battery management system main control unit notifies electricity consumption/charhing unit to drop power, and maximum current is no more than（M-1）I/M, together
When inform M/1 single battery modules cut-out output, battery management system main control unit acquisition electric current simultaneously control main relay, in institute
There is single battery module too low or too high for voltage and there are under the high extreme case of current-carrying security risk, cuts off main relay.
Compared with prior art, beneficial effects of the present invention are as follows：
The present invention both need not install BMS on each road, and need not also use big current-carrying capacity is connected in parallel device, only uses
A set of BMS and small current-carrying capacity are connected in parallel device and can prevent the overcurrent risk of parallel branch, and application cost substantially reduces, and
The connection state of the mechanical tie point of series connection can be detected, can avoid the security risk caused by the mechanical tie point of series connection loosens
The problem of, while the temperature change of parallel branch is monitored, intermodule parallel branch electricity that may be present in parallel can be solved
The problem of being lost in control.
Description of the drawings
Fig. 1 is the normal schematic diagram of single battery module connection in series-parallel；
Fig. 2 is single battery module connection in series-parallel exception schematic diagram；
Fig. 3 is electric vehicle/energy-storage system application schematic diagram；
Fig. 4 is single battery module principle schematic.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
- 4 are please referred to Fig.1, a kind of low cost solves the protection system of current-carrying hidden danger on cell parallel circuit, protects system
It is made of power battery pack, temperature control system and battery management system, power battery pack is by M*N standard single battery module group
At, N number of monocell modules in parallel, is connected using conducting wire between each monocell module, adopted by RS485 communication modes and voltage
Collection conducting wire is connected to conducting wire between monocell group management system, such as single battery module M/1 and M/2 and connects, logical by RS485
Letter mode is connected to M/1 and M/2 to monocell group management system M, and so on；The N number of monocell modules in parallel body of M strings leads to again
Excessive current-carrying copper bar connection, for example connected by big current-carrying copper bar between single battery module M/1 and single battery module M-1/1
It connects, is connected by big current-carrying copper bar between single battery module M/2 and single battery module M-1/2, and so on；M single
Batteries management system is connected to battery management system main control unit, battery management system master by RS485 or CAN communication mode
Unit is controlled with electricity consumption/charhing unit by RS485 or CAN communication, battery management system main control unit collects M single battery group pipe
Manage system related information, and monomer battery voltage is too low excessively high or there are when current-carrying hidden danger when wherein having, battery management system master
Control unit is notified that electricity consumption/charhing unit reduces electric current input/output ability, cut off related single battery module electric current output/
Input, to prevent the serious security risk of copper bar current-carrying overload fever from occurring.
Single battery module is by N*R strings and battery pack, temperature collecting cell, temperature conditioning unit, charge control MOS and electric current
The compositions such as collecting unit, go here and there and battery pack is composed in series by N number of R single battery parallel connection module, with 48/60V 20AH batteries
Based on system, it is primarily used to form standard module.
Temperature control system is made of temperature monitoring unit and control unit, current-carrying hidden danger safety in parallel is taken precautions against, by n+1 temperature
Sensor composition is spent, i.e. T0~Tn acquires R single battery connecting copper bar electric current, for example Tn mainly acquires the n-th series winding and connects R
Single battery copper bar temperature, when T is more than that fiducial temperature T ' sets numerical value, temperature conditioning unit cuts off charge and discharge MOS, and informs single electricity
Pond group management system and battery management system main control unit, system drop power output, pass through J1 connectors and adjacent single battery
Modules in parallel, DC+ connect upper level single battery module by copper bar, and DC- connects next stage single battery module by copper bar.
Battery management system is made of voltage acquisition unit and balanced unit, and voltage acquisition unit mainly monitors monomer in parallel
Cell voltage, balanced unit is using passive equal balance system.
When power battery pack maximum current-carrying capability be I, when M/1 occur over-pressed, under-voltage or current-carrying security risk when, cell tube
It manages system master unit notice electricity consumption/charhing unit and drops power, maximum current is no more than（M-1）I/M, while informing that M/1 is mono-
A battery modules cut-out output, battery management system main control unit acquisition electric current simultaneously controls main relay, in all single batteries
Module is too low or too high for voltage and there are under the high extreme case of current-carrying security risk, cuts off main relay.
In use, the present invention both need not install BMS on each road, also the in parallel of big current-carrying capacity need not be used to connect
Device is connect, only being connected in parallel device and can prevent the overcurrent risk of parallel branch, application cost with a set of BMS and small current-carrying capacity
It substantially reduces, and the connection state of the mechanical tie point of series connection can be detected, can avoid making because of the mechanical tie point loosening of series connection
At security risk the problem of, while the temperature change of parallel branch is monitored, can solve intermodule parallel connection there may be
Parallel branch current run-away the problem of.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (5)
1. a kind of low cost solves the protection system of current-carrying hidden danger on cell parallel circuit, it is characterised in that：Its protect system by
Power battery pack, temperature control system and battery management system composition, power battery pack are made of M*N standard single battery module, N
A monocell modules in parallel is connected between each monocell module using conducting wire, is led by RS485 communication modes and voltage acquisition
Line is connected to conducting wire between monocell group management system, such as single battery module M/1 and M/2 and connects, and passes through RS485 communication parties
Formula is connected to M/1 and M/2 to monocell group management system M, and so on；M goes here and there N number of monocell modules in parallel body again by big
Current-carrying copper bar connects, for example is connected by big current-carrying copper bar between single battery module M/1 and single battery module M-1/1, single
It is connected by big current-carrying copper bar between a battery modules M/2 and single battery module M-1/2, and so on；M single battery group
Management system is connected to battery management system main control unit, battery management system main control unit by RS485 or CAN communication mode
With electricity consumption/charhing unit by RS485 or CAN communication, battery management system main control unit collects M monocell group management system
Relevant information, and monomer battery voltage is too low excessively high or there are when current-carrying hidden danger when wherein having, battery management system main control unit
It is notified that electricity consumption/charhing unit reduces electric current input/output ability, cuts off related single battery module electric current input/output, with
Prevent the serious security risk of copper bar current-carrying overload fever from occurring.
2. a kind of low cost according to claim 1 solves the protection system of current-carrying hidden danger on cell parallel circuit, special
Sign is：The single battery module by N*R string and battery pack, temperature collecting cell, temperature conditioning unit, charge control MOS and
The compositions such as current acquisition unit, go here and there and battery pack is composed in series by N number of R single battery parallel connection module, with 48/60V 20AH
Based on battery system, it is primarily used to form standard module.
3. a kind of low cost according to claim 1 solves the protection system of current-carrying hidden danger on cell parallel circuit, special
Sign is：The temperature control system is made of temperature monitoring unit and control unit, current-carrying hidden danger safety in parallel is taken precautions against, by n+1
A temperature sensor composition, i.e. T0~Tn acquires R single battery connecting copper bar electric current, for example Tn mainly acquires the n-th series winding and connects
R single battery copper bar temperature, when T is more than that fiducial temperature T ' sets numerical value, temperature conditioning unit cuts off charge and discharge MOS, and informs
Power output drops in monocell group management system and battery management system main control unit, system, by J1 connectors with it is adjacent single
Battery modules in parallel, DC+ connect upper level single battery module by copper bar, and DC- connects next stage single battery by copper bar
Module.
4. a kind of low cost according to claim 1 solves the protection system of current-carrying hidden danger on cell parallel circuit, special
Sign is：The battery management system is made of voltage acquisition unit and balanced unit, and voltage acquisition unit mainly monitors parallel connection
Monomer battery voltage, balanced unit is using passive equal balance system.
5. a kind of low cost according to claim 1 solves the protection system of current-carrying hidden danger on cell parallel circuit, special
Sign is：The power battery pack maximum current-carrying capability of working as is I, when over-pressed, under-voltage or current-carrying security risk occurs for M/1, electricity
Pond manages system master unit notice electricity consumption/charhing unit and drops power, and maximum current is no more than（M-1）I/M, while informing M/
The cut-out output of 1 single battery module, battery management system main control unit acquisition electric current simultaneously controls main relay, in all single electricity
Pond module is too low or too high for voltage and there are under the high extreme case of current-carrying security risk, cuts off main relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810109175.4A CN108376806A (en) | 2018-02-05 | 2018-02-05 | A kind of low cost solves the protection system of current-carrying hidden danger on cell parallel circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810109175.4A CN108376806A (en) | 2018-02-05 | 2018-02-05 | A kind of low cost solves the protection system of current-carrying hidden danger on cell parallel circuit |
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| Publication Number | Publication Date |
|---|---|
| CN108376806A true CN108376806A (en) | 2018-08-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810109175.4A Pending CN108376806A (en) | 2018-02-05 | 2018-02-05 | A kind of low cost solves the protection system of current-carrying hidden danger on cell parallel circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109494775A (en) * | 2018-11-26 | 2019-03-19 | 上海融政能源科技有限公司 | A kind of container energy-storage system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944641A (en) * | 2009-07-06 | 2011-01-12 | 新能源科技有限公司 | Connection scheme for multiple battery cells |
| CN203406389U (en) * | 2013-07-24 | 2014-01-22 | 浙江万向亿能动力电池有限公司 | Battery pack parallel-connection control box of electric automobile |
| CN105006867A (en) * | 2015-08-05 | 2015-10-28 | 深圳先进储能材料国家工程研究中心有限公司 | Battery unit connecting circuit of energy storage system applied to high-power and high-voltage working conditions |
| CN205523735U (en) * | 2016-01-22 | 2016-08-31 | 深圳市智锂能源科技有限公司 | Full life cycle intelligence supervisory systems of power lithium cell |
| CN205768708U (en) * | 2016-07-20 | 2016-12-07 | 中国重汽集团济南动力有限公司 | A kind of parallel electrokinetic cell system |
-
2018
- 2018-02-05 CN CN201810109175.4A patent/CN108376806A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944641A (en) * | 2009-07-06 | 2011-01-12 | 新能源科技有限公司 | Connection scheme for multiple battery cells |
| CN203406389U (en) * | 2013-07-24 | 2014-01-22 | 浙江万向亿能动力电池有限公司 | Battery pack parallel-connection control box of electric automobile |
| CN105006867A (en) * | 2015-08-05 | 2015-10-28 | 深圳先进储能材料国家工程研究中心有限公司 | Battery unit connecting circuit of energy storage system applied to high-power and high-voltage working conditions |
| CN205523735U (en) * | 2016-01-22 | 2016-08-31 | 深圳市智锂能源科技有限公司 | Full life cycle intelligence supervisory systems of power lithium cell |
| CN205768708U (en) * | 2016-07-20 | 2016-12-07 | 中国重汽集团济南动力有限公司 | A kind of parallel electrokinetic cell system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109494775A (en) * | 2018-11-26 | 2019-03-19 | 上海融政能源科技有限公司 | A kind of container energy-storage system |
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Application publication date: 20180807 |
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