CN108110859A - In a kind of battery pack with Redundancy Design and Homogeneity between groups manage system - Google Patents
In a kind of battery pack with Redundancy Design and Homogeneity between groups manage system Download PDFInfo
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- CN108110859A CN108110859A CN201810072918.5A CN201810072918A CN108110859A CN 108110859 A CN108110859 A CN 108110859A CN 201810072918 A CN201810072918 A CN 201810072918A CN 108110859 A CN108110859 A CN 108110859A
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- Prior art keywords
- battery pack
- switch matrix
- battery
- redundancy
- homogeneity
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Classifications
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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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
Abstract
The present invention provides in a kind of battery pack with Redundancy Design and Homogeneity between groups manage system, including at least two be sequentially connected in series battery pack, redundancy battery pack, MCU processing units, detection acquisition module, drive module, decoding circuit, the first order switch matrix identical with battery pack number, the transformer identical with battery pack number, two second level switch matrix；Single battery containing at least two series connection in each battery pack.Design cost of the present invention is lower, realizes difficulty with small, portfolio effect is stronger.It can be while battery management system development cost be alleviated, moreover it is possible to reach good portfolio effect.
Description
Technical field
The present invention relates in cell sealing technical field more particularly to a kind of battery pack with Redundancy Design between group
Weigh management system.
Background technology
Accumulation power supply is mainly using ferric phosphate lithium cell at present, and lithium ion battery has small, and energy density is higher, nothing
Memory effect, cycle life are high, and self-discharge rate is low, it is safe the advantages that.
Charge and discharge, performance and the safety problem of lithium battery are controlled by battery management system.Battery management system
It is the important pivot between energy accumulation current converter PCS and battery, is mainly used for that battery physical parameter monitors in real time, battery status is estimated
Meter, inline diagnosis and early warning, charger electric discharge and preliminary filling control, balanced management and heat management etc..
Lithium battery in the early stage in groups when relevant parameter can be controlled in certain section（Parameter is allowed as far as possible close to identical）, but electricity
Pond group will be changed using each single battery part uniformity after a period of time, be joined particularly through monomer after high current charge-discharge
The problem of number is inconsistent is particularly evident, and battery pack parameters later stage variation meeting bigger, short -board effect is more prominent, causes battery
Group charge and discharge active volume is fewer and fewer, and service life also decreases.
In order to break battery pack bucket short -board effect, the prior art is general by the way of passive balanced and active equalization,
But it has some disadvantages：
1. passive euqalizing current is smaller, balancing speed is slow, efficiency is low, almost nil for the energy-storage battery effect of high power capacity；
2. the passive balanced form using conductive discharge, off-energy, resistance heating can cause BMS hardware circuit boards
It is certain to influence, battery can be damaged when serious, influence battery；
3. current active equalization mainly realizes that euqalizing current is big, and effect is more using forms such as capacitance, inductance, bi-directional DC-DCs
Substantially, but hardware circuit cost is higher, and control strategy is complicated, and relative difficult is realized, and is mainly used in group balanced.And
It is difficult to use in the solution that some reduce cost.
The content of the invention
To solve the above problems, the present invention provides in a kind of battery pack with Redundancy Design and Homogeneity between groups management system
System, including at least two be sequentially connected in series battery pack, redundancy battery pack, MCU processing units, detection acquisition module, drive module,
Decoding circuit, the first order switch matrix identical with battery pack number, the transformer identical with battery pack number, two second level
Switch matrix；Single battery containing at least two series connection in each battery pack；
MCU processing units are connected with detection acquisition module, drive module, decoding circuit；
Each battery pack is correspondingly arranged a first order switch matrix, a transformer, the positive electrode and negative electrode of each single battery
First order switch matrix is connected to, which connects again with the primary side of corresponding transformer, time of the transformer
Grade side both ends are connected by a second level switch matrix with redundancy battery pack；
The one side of one second level switch matrix is connected to battery pack or transformer, and opposite side is connected to redundancy battery pack；Separately
The one side of one second level switch matrix is connected to the primary side of transformer, and opposite side is connected to redundancy battery pack；
Drive module is used to control the normally of all switches and disconnection in first order switch matrix and second level switch matrix；
Decoding circuit is used to control the work of first order switch matrix and second level switch matrix；
Detection acquisition module gathers single battery, battery pack information for detecting single battery, the charge condition of battery pack.
MCU processing units also gather mould for controlling decoding circuit, drive module, detection acquisition module work to detection
Block is transmitted back to the data come and is handled and control its storage.
Further, at least one current-limiting circuit of the primary side of transformer.
Further, single battery in each connecting wire of first order switch matrix with being provided with fuse.
Further, it is provided with fuse in each connecting wire between battery pack and second level switch matrix.
Further, the first order switch matrix, second level switch matrix are made of controllable switch, and described is controllable
Switch is using field-effect tube either light coupling relay.
Further, decoding circuit is built by using 74HC138 decoders.
Further, detection acquisition module, which is transmitted back to the data come, includes operation data, battery status information, failure letter
Breath.
Beneficial effects of the present invention are：
The present invention is comprehensive to do basis using the prior art, using the design philosophy of redundancy battery pack, Homogeneity between groups work(in realization group
Energy.Compared with the prior art, design cost is lower, realizes difficulty with small, portfolio effect is stronger.Battery management system can alleviated
While development cost of uniting, moreover it is possible to reach good portfolio effect.
Description of the drawings
Fig. 1 is battery pack, single battery and first order switch matrix, second level switch matrix, the connection signal of transformer
Figure.
Fig. 2 is first order switch matrix, second level switch matrix cut-away view.
Specific embodiment
System of the present invention includes battery pack, redundancy battery pack, MCU processing units, detection acquisition module（AFE）, drive
Dynamic model block, decoding circuit.MCU processing units and detection acquisition module（AFE）, drive module, decoding circuit connection.
Battery pack and the connection relation of each switch matrix, transformer are introduced with reference to Fig. 1.
The present invention is provided with battery pack that is more than two and being sequentially connected in series.There are two be sequentially connected in series in each battery pack
A and its above single battery.
Switch matrix includes the first order switch matrix identical with battery pack number, two second level switch matrix.Transformation
Device is also identical with battery pack number.
Connection relation between battery, battery pack, transformer, first order switch matrix, second level switch matrix is：
Each battery pack is correspondingly arranged a first order switch matrix, a transformer, the positive electrode and negative electrode of each single battery
Primary side through corresponding first order switch matrix and corresponding transformer connects, and the primary side both ends of transformer pass through one the
Secondary switch matrix is connected with redundancy battery pack.
The anode of each battery pack is connected through second level switch matrix with the anode of redundancy battery pack, and each battery pack is born
Pole is connected through second level switch matrix with the cathode of redundancy battery pack.N number of single battery in each battery pack passes through N+1
Root conducting wire is connected to corresponding first order switch matrix.M battery pack is connected to another second level by M+1 root conducting wires and switchs
Matrix.Wherein, the connecting line between each battery pack also connects all second level switch matrix.Wherein, N and M is integer.
Battery or the positive and negative anodes of battery pack are realized with the gating in parallel by switch matrix of redundancy battery pack or transformer.
First order switch matrix is identical with the internal structure of second level switch matrix（As shown in Figure 2）.First order cubicle switchboard
The one side of battle array is connected to single battery, and opposite side is connected to transformer.The one side of second level switch matrix be connected to battery pack or
Person's transformer, opposite side are connected to redundancy battery pack.
Preferably, at least one current-limiting circuit of the primary side of each transformer, when for multiple current-limiting circuits, each limit
Current circuit is connected.
Preferably, in each connecting wire of single battery and first order switch matrix, it is preferably provided with fuse use
It is flowed in letting off.
Preferably, in each connecting wire between battery pack and second level switch matrix, it is preferably provided at least one
A fuse is used to let off stream.
Drive module is to control first order switch matrix and second level cubicle switchboard by using field-effect tube driving circuit
The normally of all switches and disconnection in battle array.The module is using ripe circuit of the prior art.
Decoding circuit is used to control the work of first order switch matrix and second level switch matrix.Decoding circuit is by making
The decoding circuit built with 74HC138 decoders controls.As shown in Figure 1, each battery pack has 8 single batteries, then first
Respectively one monocell of connection, K9-K12 are all connected with K1-K8 to switch K1-K8 in grade switch matrix or second level switch matrix,
Decoding circuit controls the conducting and disconnection of two groups of switches, realizes the positive and negative anodes both sides of single battery or battery pack to primary
Side or the conducting of redundancy battery pack positive and negative anodes.All switch matrix are made of controllable switch, and the controllable switch uses field
Effect pipe（MOSFET）Either light coupling relay.
Detect acquisition module（AFE）Using existing mature modules, for detecting the electricity of single battery, battery pack
Situation, acquisition single battery, battery pack information.
MCU processing units are connected with drive module, decoding circuit, detection acquisition module, for controlling decoding circuit, driving
Module, detection acquisition module work are also transmitted back to detection acquisition module the data come and are handled and control its storage.Institute
Stating data includes operation data（Voltage, electric current, temperature, real-time charge-discharge electric power）, battery status information（It charges, discharges, is standby
State etc.）, fault message（The fault messages such as single battery is over-pressed, under-voltage, overcurrent, excess temperature, low temperature）.
Preferably, MCU processing units can also carry out fault diagnosis according to treated data, and be connected with alarm device,
After diagnosis is out of order, control alarm device carries out alarm.
The method of work of the present invention is illustrated below.
1）Charge balancing：
In battery pack：
Detection acquisition module measures the voltage and current of each single battery, the remaining electricity of each single battery of comprehensive estimate in real time
Amount（SOC）, judged according to SOC closest to the single battery being full of, it will most by the respective switch for gating first order switch matrix
Go out charge circuit close to the cell bypass being full of, connected with corresponding transformer, the charging load of charge circuit is shunted a part
To transformer primary, the respective switch of the backgating second level switch matrix through transformer boosting charges to redundancy battery pack,
Part charging load is undertaken, to delay the time that the single battery is full of.
Between battery pack：
Detection acquisition module measures the voltage and current of each battery pack, the residual capacity of each battery pack of comprehensive estimate in real time
（SOC）, judged according to SOC closest to the battery pack being full of, it will be closest by the respective switch for gating second level switch matrix
The battery pack being full of bypasses out charge circuit, and the portion of electrical current of charge circuit is shunted by redundancy battery pack, extends the battery
The time that group is full of.
（2）Equalization discharge：
In battery pack：
Principle is similar with charge balancing, and detection module measures the voltage and current of each battery in real time, and comprehensive estimate is each electric
The remaining capacity in pond（SOC）, the single battery closest to emptying is judged according to SOC, by the phase for gating first order switch matrix
Inductive switch will go out discharge loop closest to the cell bypass of emptying, is connected with transformer, the electric discharge of discharge loop is met shunting
A part to transformer primary, the respective switch of gating second level switch matrix makes redundancy battery pack pass through transformer secondary
Decompression is discharged, and undertakes partial discharge load, to delay the time that the single battery is vented.
Between battery pack：
Detection acquisition module measures the voltage and current of each battery pack, the remaining capacity of each battery pack of comprehensive estimate in real time
（SOC）, the battery pack closest to emptying is judged according to SOC, is put to the proof and will be bypassed closest to emptying battery pack by second level switch
Go out discharge loop, the portion of electrical current of discharge loop is shunted by redundancy battery pack, to delay the time that the battery pack is vented.
Claims (7)
1. in a kind of battery pack with Redundancy Design and Homogeneity between groups manage system, which is characterized in that including at least two according to
Battery pack, redundancy battery pack, MCU processing units, detection acquisition module, drive module, decoding circuit and the battery pack of secondary series connection
The identical first order switch matrix of number, the transformer identical with battery pack number, two second level switch matrix；Each battery
Single battery containing at least two series connection in group；
MCU processing units are connected with detection acquisition module, drive module, decoding circuit；
Each battery pack is correspondingly arranged a first order switch matrix, a transformer, the positive electrode and negative electrode of each single battery
First order switch matrix is connected to, which connects again with the primary side of corresponding transformer, time of the transformer
Grade side both ends are connected by a second level switch matrix with redundancy battery pack；
The one side of one second level switch matrix is connected to battery pack or transformer, and opposite side is connected to redundancy battery pack；Separately
The one side of one second level switch matrix is connected to the primary side of transformer, and opposite side is connected to redundancy battery pack；
Drive module is used to control the normally of all switches and disconnection in first order switch matrix and second level switch matrix；
Decoding circuit is used to control the work of first order switch matrix and second level switch matrix；
Detection acquisition module gathers single battery, battery pack information for detecting single battery, the charge condition of battery pack；
MCU processing units also adopt detection acquisition module for controlling decoding circuit, drive module, detection acquisition module work
The data that collection is returned are handled and control its storage.
2. system is managed with Homogeneity between groups, which is characterized in that become in the battery pack with Redundancy Design as described in claim 1
At least one current-limiting circuit of the primary side of depressor.
3. system is managed with Homogeneity between groups, which is characterized in that single in the battery pack with Redundancy Design as described in claim 1
Body battery in each connecting wire of first order switch matrix with being provided with fuse.
4. system is managed with Homogeneity between groups, which is characterized in that electricity in the battery pack with Redundancy Design as described in claim 1
Fuse is provided in each connecting wire between pond group and second level switch matrix.
5. system is managed with Homogeneity between groups, which is characterized in that institute in the battery pack with Redundancy Design as described in claim 1
State first order switch matrix, second level switch matrix is made of controllable switch, the controllable switch using field-effect tube or
It is light coupling relay.
6. system is managed with Homogeneity between groups, which is characterized in that translate in the battery pack with Redundancy Design as described in claim 1
Code circuit is built by 74HC138 decoders.
7. system is managed with Homogeneity between groups, which is characterized in that inspection in the battery pack with Redundancy Design as described in claim 1
Surveying the data of acquisition module acquisition includes operation data, battery status information, fault message.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810072918.5A CN108110859A (en) | 2018-01-25 | 2018-01-25 | In a kind of battery pack with Redundancy Design and Homogeneity between groups manage system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810072918.5A CN108110859A (en) | 2018-01-25 | 2018-01-25 | In a kind of battery pack with Redundancy Design and Homogeneity between groups manage system |
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| CN108110859A true CN108110859A (en) | 2018-06-01 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109193050A (en) * | 2018-10-08 | 2019-01-11 | 爱驰汽车有限公司 | Battery parlor electricity active equalization method and device |
| CN110474386A (en) * | 2019-07-25 | 2019-11-19 | 国网江苏省电力有限公司经济技术研究院 | A kind of energy storage battery system multi-layer active equalization circuit and control method |
| CN113640686A (en) * | 2021-07-12 | 2021-11-12 | 杭州高特电子设备股份有限公司 | Fault self-diagnosis device and method |
| CN115021365A (en) * | 2022-06-27 | 2022-09-06 | 国网湖北省电力有限公司电力科学研究院 | Battery equalization method, device, equipment and storage medium based on energy storage system |
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| CN109193050A (en) * | 2018-10-08 | 2019-01-11 | 爱驰汽车有限公司 | Battery parlor electricity active equalization method and device |
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| CN113640686A (en) * | 2021-07-12 | 2021-11-12 | 杭州高特电子设备股份有限公司 | Fault self-diagnosis device and method |
| CN113640686B (en) * | 2021-07-12 | 2024-03-12 | 杭州高特电子设备股份有限公司 | Fault self-diagnosis device and method |
| CN115021365A (en) * | 2022-06-27 | 2022-09-06 | 国网湖北省电力有限公司电力科学研究院 | Battery equalization method, device, equipment and storage medium based on energy storage system |
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Application publication date: 20180601 |