CN205945114U - Battery management system - Google Patents

Battery management system Download PDF

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Publication number
CN205945114U
CN205945114U CN201620615449.3U CN201620615449U CN205945114U CN 205945114 U CN205945114 U CN 205945114U CN 201620615449 U CN201620615449 U CN 201620615449U CN 205945114 U CN205945114 U CN 205945114U
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China
Prior art keywords
battery
substring
battery management
management
total
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Application number
CN201620615449.3U
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Chinese (zh)
Inventor
王俊毅
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.)
Suzhou Hengmei electronic Polytron Technologies Inc
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SUZHOU HENGMEI ELECTRON TECHNOLOGY Co Ltd
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Application filed by SUZHOU HENGMEI ELECTRON TECHNOLOGY Co Ltd filed Critical SUZHOU HENGMEI ELECTRON TECHNOLOGY Co Ltd
Priority to CN201620615449.3U priority Critical patent/CN205945114U/en
Application granted granted Critical
Publication of CN205945114U publication Critical patent/CN205945114U/en
Priority claimed from US15/437,138 external-priority patent/US20170373512A1/en
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Abstract

The utility model discloses a battery management system, include: the battery package, the battery package forms by a plurality of substring batteries are parallelly connected, the substring battery is established ties by a plurality of battery cell and is formed, substring battery management system, substring battery management system's quantity is the same with the quantity of substring, and two wires are drawn forth to every tie point between the battery cell in the every group substring battery, one of them directness with substring battery management system connects, another root then through thermistor with substring battery management system connects, and total battery management system, total battery management system with substring battery management system and electric automobile's control system connects. The utility model discloses can discover temperature and voltage trouble in the shortest time, it is on fire even to avoid causing the battery package to damage, and the security performance of battery package has been improved to apparent landing.

Description

Battery management system
Technical field
The present invention relates to cell art, particularly to a kind of battery management system.
Background technology
Battery management system (BMS, Battery Management System) is between battery and automobile driving system Tie, can improve the utilization rate of battery, prevent battery from excessive charge and discharge phenomena, extend the service life of battery, monitoring The state of battery.
At present, the composition of the electrokinetic cell bag of electric automobile is complex, is generally first become by several minor comonomer cell parallels The module of larger capacity, then with the battery bag of high voltage needed for a lot of block coupled in series one-tenth, is finally supplied from battery bag to motor Electricity, or even also more complicated connection in series-parallel scheme.Minor comonomer battery in above-mentioned module is more due to quantity, battery management system It is only capable of module is monitored it is impossible to the voltage specific to each cell and temperature, once a certain batteries hinder for some reason sending out Heat, because conduction of heat needs a period of time to get to nearest temperature sensor, BMS often fails to find fault in time, has Battery bag is caused to damage even automobile hidden danger on fire.If monitoring each section cell, battery management system is again excessively Bulky complex, involves great expense, and this is always an an open question.
Content of the invention
The present invention provides a kind of battery management system, to solve above-mentioned particular problem present in prior art.
For solving above-mentioned technical problem, the present invention provides a kind of battery management system, including:
Battery bag, described battery bag is formed by some substring cell parallels, and described substring battery is by some cell strings Connection forms, and the total voltage of substring battery is equal with battery bag total voltage;
Substring battery management system, the quantity of described substring battery management system is identical with the quantity of described substring, and often In group substring battery, each junction point between cell draws two wires, wherein one direct and described substring cell tube Reason system connects, and another is then connected with described substring battery management system by critesistor;
And
Total battery management system, described total battery management system and described substring battery management system and electric automobile Control system is passed through two different CAN and is connected.
Preferably, being also associated with sample circuit between described substring battery management system and described cell.
Preferably, described sub- battery management system and sample circuit are integrated into SoC (System on Chip) chip.
Preferably, being all in series with a relay on every group of substring battery, described relay is by described total battery management system System controls.
Preferably, being connected by CAN between described substring battery management system and described total battery management system.
Preferably, passing through another road CAN between described total battery management system and the other control system of electric automobile Bus connects.
Preferably, described critesistor is attached on described cell.
Present invention also offers a kind of battery management method, using described battery management system, substring battery management system The working condition of system detection substring battery, so that when the fault of unrepairable in substring battery, to total battery management system Report, this substring battery is disconnected by the latter with other substring batteries;Described total battery management system calculates the total current of battery bag, And with described substring battery management system cooperation, control discharge and recharge when substring battery incision, cut out.
Preferably, when described battery bag charges, total battery management system is up to the substring electricity of alarm for high voltage degree Pond is disconnected with other substring batteries, and this mode ensure that each substring battery is filled with.
Preferably, when described battery bag is discharged, total battery management system is up to the substring electricity of low pressure alarming degree Pond and other substring batteries disconnect, with guarantee automobile can normally travel as far as possible to charging station.
Compared with prior art, the present invention has advantages below:
1st, the present invention can realize the temperature to each cell and voltage is monitored, and this is conventional battery management system System is not accomplished.When a certain cell breaks down, fault can be found within the time shorter than past any scheme, Avoid causing battery bag to damage or even on fire, substantially increase the security performance of battery bag;
2nd, the present invention can adopt standard, modular SoC chip, can production application to reduce cost, contract in a large number Small size, lowers complexity, solves in prior art, monitors the system that each cell faces excessively huge Expensive problem;
3rd, the quantity of cell, the quantity of substring battery all can be adjusted according to actual needs, whole cell tube The assembling of reason system is convenient just as playing with building blocks, wide accommodation;
4th, the cell of the present invention is disposably connected and is reached required voltage, forms substring battery, then by substring electricity Parallel connection reaches desired volume according to actual needs in pond, and the substring of string brownout is postponed and is incorporated to battery bag, thus will not be Electric current in producing inside battery bag, in this, electric current is that the hidden danger causing heating, internal consumption is located.Battery proposed by the present invention Management system internal current can be zero when vehicle stops, because often the relay of a string substring can be disconnected.
Brief description
Fig. 1 is the configuration diagram of substring battery in the battery management system of the present invention;
Fig. 2 is the annexation of battery management system total in the battery management system of the present invention and substring battery management system Figure.
Shown in figure:10- substring battery, 101- cell, 20- substring battery management system, 30- critesistor, 40- Total battery management system, 50- sample circuit
Specific embodiment
Understandable for enabling the above objects, features and advantages of the present invention to become apparent from, below in conjunction with the accompanying drawings to the present invention Specific embodiment be described in detail.It should be noted that, accompanying drawing of the present invention is all in the form of simplifying and all using non-essence Accurate ratio, only in order to purpose that is convenient, lucidly aiding in illustrating the embodiment of the present invention.
As shown in Figure 1 to Figure 2, the present invention provides a kind of battery management system, including:
Battery bag, described battery bag is formed in parallel by some substring batteries 10, and described substring battery 10 is by some monomers electricity Pond series connection 101 forms;
The quantity of substring battery management system 20, the quantity of described substring battery management system 20 and described substring battery 10 Identical, and in every group of substring battery 10, each junction point of cell 101 draws two wires, wherein one is direct and described Substring battery management system 20 connects to measure monomer voltage, and another is then passed through critesistor 30 and described substring battery management System 20 connects, and described critesistor 30 is attached on described cell 101 with accurate measurement monomer temperature;Specifically, institute State substring battery management system 20 for measuring the voltage of each monomer, temperature in corresponding substring battery 10, calculating should The SOC (battery charging state) of substring battery, (State Of Power, SOP refer to lower a period of time to SOH (life-span of battery) and SOP Such as next 2 seconds, 10 seconds, the discharge power of maximum that can provide with battery when lasting heavy-current discharge for 30 seconds are provided Or the power being electrically charged), the cell 101 that there is fault is reported to the police and is processed, to monomer electricity each in substring battery Pond 101 carries out active and passive equilibrium, communicates with total battery management system 40 simultaneously;
And
Total battery management system 40, described total battery management system 40 and described substring battery management system 20 and electronic The other control system of automobile passes through two different CAN and connects.Described total battery management system 40 is by electric with substring The communication of pond management system 20, realizes the incision to each substring battery 10, cuts out and the communication with other controllers in automobile. When a certain substring battery 10 for some reason (temperature, electric voltage exception) occur unrepairable fault when, this substring battery 10 is entirely cut In addition to going out battery bag, the power of car load is limited simultaneously, and then keeped in repair to car owner's time enough.
Preferably, being also associated with sample circuit between described substring battery management system 20 and described cell string 10 50, further, described sub- battery management system 20 can be integrated into SoC (System on Chip) core with sample circuit 50 Piece, to reduce volume, reduces cost.
Preferably, being all in series with a relay on every group of substring battery 10, described relay is by described total battery management System 40 controls, and in other words, in actual applications, can according to circumstances determine this substring battery 10 the need of sealing in, this To realize by using described relay.
Preferably, passing through CAN between described substring battery management system 20 and described total battery management system 40 Connect, be connected by another CAN between described total battery management system 40 and the general control system of electric automobile, realize The interaction of information, and then the whole battery bag of more preferable management.
With continued reference to Fig. 1 and Fig. 2, present invention also offers a kind of battery management method, using described battery management system System, specially:Due to the battery bag of the present invention, single cell 101 is directly connected into the substring of required high voltage Battery 10, and using independent standardized substring battery management system 20, so, each section monomer on substring battery 10 The voltage of battery 101, temperature, SOC, equilibrium are all monitored.Whole battery bag is by the parallel connection of several such substring batteries 10 Become, then substring battery management system 20 is managed by the relatively simple total battery management system 40 of One function, by substring cell tube Reason system 20 manages substring battery 10.When several or dozens of substring battery 10 and when being unified into battery bag, each substring battery 10 Total voltage not necessarily equal (can accurately measure when the relay of every string is not switched on), and each substring battery 10 is total Voltage is to be obtained by the voltage addition calculation of all cells connected.Therefore, in order to avoid substring battery that voltage is low 10 become the load forming battery bag after other substring battery 10 parallel connections, can suitably postpone the substring battery 10 of low-voltage simultaneously When entering the moment of battery bag, namely starting electric discharge, the low substring battery 10 of voltage is first not incorporated in way circuit, waits this substring battery 10 Voltage equal with the voltage of other substring batteries 10 when be incorporated to again.Short-term can also switch out electricity in electric discharge running Press through low substring battery 10.
In other words, the battery management system of the present invention can be in electric discharge, the substring battery 10 that brownout is reported to the police Disconnect.Because the capacity of every substring battery 10 is little, lack a string battery bag performance impact less, or at least can coordinate Limit power enables driver that car is reached charging station.And when charging, the substring battery 10 filling with can be switched out, so may be used To reach the purpose that each substring battery 10 is all filled.Certainly, need charger cooperation adjustment charging current during this.As This, its equilibrium cost is far below active equalization general in the past, does not have the energy wave that big euqalizing current unavoidably causes simultaneously Take, and depth of discharge also increased.The replacement past as suggested in the present invention, scheme was likely to become in the future in a balanced way in a balanced way Main flow.
Obviously, those skilled in the art can carry out the various changes and modification spirit without deviating from the present invention to invention And scope.So, if these modifications of the present invention and modification belong to the claims in the present invention and its equivalent technologies scope it Interior, then the present invention is also intended to including these changes and modification.

Claims (7)

1. a kind of battery management system is it is characterised in that include:
Battery bag, described battery bag is formed by some substring cell parallels, described substring battery connected by some cells and Become, the total voltage of substring battery is equal with battery bag total voltage;
Substring battery management system, the quantity of described substring battery management system is identical with the quantity of substring, and every group of substring electricity In pond, each junction point between cell draws two wires, and wherein one directly with described substring battery management system even Connect, another is then connected with described substring battery management system by critesistor;
And
Total battery management system, described total battery management system and described substring battery management system and electric automobile other Controller connects.
2. battery management system as claimed in claim 1 is it is characterised in that described substring battery management system and described monomer It is also associated with sample circuit between battery.
3. battery management system as claimed in claim 2 is it is characterised in that described substring battery management system and sample circuit It is integrated into SoC (System on Chip) chip.
4. battery management system as claimed in claim 1 is it is characterised in that be all in series with a relay on every group of substring battery Device, described relay is controlled by described total battery management system.
5. battery management system as claimed in claim 1 is it is characterised in that described substring battery management system and described total electricity Connected by CAN between the management system of pond.
6. battery management system as claimed in claim 1 is it is characterised in that described total battery management system and electric automobile Connected by another CAN between other control system.
7. battery management system as claimed in claim 1 is it is characterised in that described critesistor is attached to described cell On.
CN201620615449.3U 2016-06-21 2016-06-21 Battery management system Active CN205945114U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620615449.3U CN205945114U (en) 2016-06-21 2016-06-21 Battery management system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201620615449.3U CN205945114U (en) 2016-06-21 2016-06-21 Battery management system
US15/437,138 US20170373512A1 (en) 2016-06-21 2017-02-20 First Series Then Parallel Battery Pack System

Publications (1)

Publication Number Publication Date
CN205945114U true CN205945114U (en) 2017-02-08

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105871037A (en) * 2016-06-21 2016-08-17 苏州恒美电子科技有限公司 Battery management system and battery management method
CN109050275A (en) * 2018-06-22 2018-12-21 北京长城华冠汽车科技股份有限公司 A kind of grouping method and device of electric automobile battery box
CN109177814A (en) * 2018-09-30 2019-01-11 北京长城华冠汽车科技股份有限公司 Electrification switching system, method and the electric car of electric automobile battery box

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105871037A (en) * 2016-06-21 2016-08-17 苏州恒美电子科技有限公司 Battery management system and battery management method
CN109050275A (en) * 2018-06-22 2018-12-21 北京长城华冠汽车科技股份有限公司 A kind of grouping method and device of electric automobile battery box
CN109177814A (en) * 2018-09-30 2019-01-11 北京长城华冠汽车科技股份有限公司 Electrification switching system, method and the electric car of electric automobile battery box

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Address after: 215200 Fuhua Road, Tongli Town, Wujiang District, Suzhou, Jiangsu 388

Patentee after: Suzhou Hengmei electronic Polytron Technologies Inc

Address before: 215200 Fuhua Road 388, Wujiang Economic Development Zone, Suzhou, Jiangsu.

Patentee before: SUZHOU HENGMEI ELECTRON TECHNOLOGY CO., LTD.