CN203707281U - Pure electric vehicle power battery back composed of lithium manganate monomer cylindrical batteries - Google Patents
Pure electric vehicle power battery back composed of lithium manganate monomer cylindrical batteries Download PDFInfo
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- CN203707281U CN203707281U CN201320751756.0U CN201320751756U CN203707281U CN 203707281 U CN203707281 U CN 203707281U CN 201320751756 U CN201320751756 U CN 201320751756U CN 203707281 U CN203707281 U CN 203707281U
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- 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
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Abstract
The utility model provides a pure electric vehicle power battery back composed of lithium manganate monomer cylindrical batteries. The pure electric vehicle power battery back both meets the torque change requirement of an electric vehicle and can be used for prolonging the service life of the battery to the maximum, reducing the internal resistance of the battery, preventing excessive temperature rise of the monomer batteries and improving the use safety of the electric vehicle. The pure electric vehicle power battery back is composed of a 1# battery box, a 2# battery box and a controller. The pure electric vehicle power battery back is composed of small specification 18650 and 26650 capacity type modified lithium manganate monomer cylindrical batteries; for the vast majority of operation states of electric vehicles, capacity type batteries have larger adaptability than power type batteries. The purchase cost is relatively low, the ventilation and heat dissipation of the monomer batteries can be increased, the optimal operation state of the internal resistance of the batteries is maintained, and the uniformity of the battery pack is improved. For the monomer exceeding a balancing domain value, the monomer can be changed conveniently so as to reduce the maintenance cost as much as possible; within a traveling range of 200, 000 km of the electric vehicle, 10% of total cost is saved.
Description
Technical field
The utility model relates to power battery of pure electric automobile group, is specifically related to a kind of power battery of pure electric automobile group of utilizing LiMn2O4 monomer cylindrical battery composition.
Background technology
Many designers, in the time running into the power battery pack Selection and Design of pure electric automobile, first consider security performance and the heavy-current discharge characteristic of battery, and this is also justifiable.But if we will deeply review down, what is again the internal factor that affects battery pack fail safe? people associate heating, burning, blast at once.Visible cell heating is the root that affects battery pack fail safe.By thermoelectricity conversion formula Q heat=0.24I2Rt (in formula: Q heat-battery-heating amount; I-battery discharge current; The battery operated internal resistance of R-; The t-continuous discharge time).Can obviously find out that the heat that each cell produces should be less than or equal to the heat (releasing pattern is mainly by radiation and conduction) that battery case discharges.If discharging current I is excessive, or internal resistance of cell R change is large, and the heat release of generation is greater than releasing heat, and the body temperature of cell will constantly rise, and at this moment just must increase externally conduct and the convection type increase radiating and cooling that utilizes the medium.Visible, as long as the thermal discharge can effectively control cell work time does not make cell body temperature rise to gradually critical, the non-security state of battery just there will not be.The maximum feature of modified lithium manganate LiMn204 battery is just its large 160W.h/Kg of specific energy, and lightweight 1Kw.h/6.2Kg is lighter by 27% than ferric phosphate lithium cell.Its these two features just, making can be under the restriction of certain mass, many being contained on pure electric automobile of trying one's best.Checking in the data of announcing by battery production factory and our practice, all types of lithium batteries have a common characteristic: discharge-rate is larger, and battery-heating amount is larger, and battery life is shorter.With our used 18650 and 26,650 two LiMn2O4 cylindrical batteries when 30 DEG C of the ambient temperatures, with 1C multiplying power (discharging current is respectively 2A and 3.6A) electric discharge 30 minutes, 44 DEG C of its surface temperature rises (not doing special heat-radiating processing); If only have 39 DEG C with its surface temperature rise of 0.3C multiplying power discharging (discharging current is respectively 0.7A and 1.2A).Visible, pack as far as possible many batteries into, reduce the discharge-rate of cell, be under overall power same case, delay battery life, promote the another kind of effective ways of battery security.The cheap of modified lithium manganate LiMn204 battery price is also an economic index that increases its applicability.
Utility model content
The purpose of this utility model is to provide a kind of power battery of pure electric automobile group of utilizing LiMn2O4 monomer cylindrical battery composition.Both meet electric automobile torque and changed requirement, and can delay to greatest extent again battery, reduced the internal resistance of cell, prevented that cell temperature rise from exceeding standard, promoted electric automobile safety in utilization.
The utility model has adopted such technical scheme: the power battery of pure electric automobile group of described LiMn2O4 monomer cylindrical battery composition, is made up of battery case, C-size battery case, a controller; It is characterized in that, in a battery case, be parallel with the first electric energy output branch road, the second electric energy output branch road, the 3rd electric energy output branch road; Article at least three, after electric energy output branch circuit parallel connection, form the gross power fan-out capability of a battery case, and by the output interface of a battery case of a battery case current splitters connection; In C-size battery case, be parallel with the 4th electric energy output branch road, the 5th electric energy output branch road, the 6th electric energy output branch road, the 7th electric energy output branch road, the 8th electric energy output branch road; Article at least four, after electric energy output branch circuit parallel connection, form the gross power fan-out capability of C-size battery case, and connect the output interface of C-size battery case by C-size battery tank current separator; The gross power fan-out capability parallel connection of the gross power fan-out capability of a battery case and C-size battery case, and connect the direct-flow input end of controller; Cell bag and the branch road shunt of electric energy output several same model of route are composed in series; Between cell bag, be connected with respectively voltage signal acquisition point.
Cell bag is selected capacity type 18650 or 26650 cylinder box hat LiMn2O4 cell compositions reasonably and is gone here and there the power battery pack of network formation pure electric automobile.The conventional discharge-rate of battery pack is controlled between 0.3-0.5C, utilizes control system to be warned and limit to large multiplying power discharging of short time (more than 2C).Operating state (working end voltage, electric current, body temperature) to each cell is implemented to monitor continuously, record, store.Implement to change to exceeding the monomer of the balanced rate of regulation.Thereby keep battery pack global consistency, harmony.
Considering as a whole after the composite factors such as battery variety (as LiFePO4, LiMn2O4, cobalt acid lithium, ternary material etc.), monomer capacity, specific energy, flash-over characteristic, discharge-rate, string structure, use LiMn2O4 cylindrical battery composition power battery of pure electric automobile group.Through the operation practice of a year, the interior temperature rise of battery case was normal, and internal resistance of single cell deviation is in allowed band, and battery power discharge characteristic meets the requirement of electric automobile load variations, and in the time moving 40,000 kilometers, battery capacity rate of descent is less than 1%.
Adopt small dimension 18650 and 26650 capacity type modified lithium manganate column type cell composition pure electric automobile vehicle mounted dynamic battery groups, for the automobile overwhelming majority's running status, capacity type battery all specific power type battery has larger applicability.Purchase cost is lower, can increase ventilation and the heat radiation of cell, keeps the optimum Working of the internal resistance of cell, the harmony of raising battery pack.For the monomer that exceeds balanced thresholding, can change easily, maintenance cost is reduced as far as possible; Make in the driving range of 200,000 kilometers, automobile, total cost has 10% saving.This further applies electric automobile, has real economic worth.
Brief description of the drawings
It shown in accompanying drawing, is the schematic diagram of the utility model concrete structure.
Embodiment
As shown in the figure, the power battery of pure electric automobile group of described LiMn2O4 monomer cylindrical battery composition, is made up of battery case 1, C-size battery case 2, a controller 3; It is characterized in that, in a battery case 1, be parallel with the first electric energy output branch road, the second electric energy output branch road, the 3rd electric energy output branch road; Article at least three, after electric energy output branch circuit parallel connection, form the gross power fan-out capability of a battery case 1, and by output interface UB+, the UB-of a battery case of a battery case current diverter F1 connection;
In C-size battery case 2, be parallel with the 4th electric energy output branch road, the 5th electric energy output branch road, the 6th electric energy output branch road, the 7th electric energy output branch road, the 8th electric energy output branch road; Article at least five, after electric energy output branch circuit parallel connection, form the gross power fan-out capability of C-size battery case 2, and connect output interface uB+, the uB-of C-size battery case by C-size battery tank current shunt F;
The gross power fan-out capability parallel connection of the gross power fan-out capability of a battery case 1 and C-size battery case 2, and connect direct-flow input end B+, the B-of controller 3.
The first electric energy output branch road is to be composed in series by cell bag D01, D11, D12, D1n and the branch road shunt F01 of same model; Between power brick, be connected with respectively voltage signal acquisition point A11, A12, A1n;
Cell bag D02, D21, D22, D2n and the branch road shunt F02 of a second electric energy output route same model are composed in series; Between power brick, be connected with respectively voltage signal acquisition point A21, A22, A23;
Cell bag D03, D31, D32, D3n and the branch road shunt F03 of a 3rd electric energy output route same model are composed in series; Between power brick, be connected with respectively voltage signal acquisition point A31, A32, A33; Cell bag D03, D31, D32, D3n connect the BMS card reader 22 in battery case 1 No. one by power supply lead wire 12;
Cell bag D04, D41, D42, D4n and the branch road shunt F04 of a 4th electric energy output route same model are composed in series; Between power brick, be connected with respectively voltage signal acquisition point A41, A42, A4n;
Cell bag D05, D51, D52, D5n and the branch road shunt F05 of a 5th electric energy output route same model are composed in series; Between power brick, be connected with respectively voltage signal acquisition point A51, A52, A53;
Cell bag D06, D61, D62, D6n and the branch road shunt F06 of a 6th electric energy output route same model are composed in series; Between power brick, be connected with respectively voltage signal acquisition point A61, A62, A63;
Cell bag D07, D71, D72, D7n and the branch road shunt F07 of a 7th electric energy output route same model are composed in series; Between power brick, be connected with respectively voltage signal acquisition point A71, A72, A73;
Cell bag D0m, Dm1, Dm2, D m3 and the branch road shunt F0m of a 8th electric energy output route same model are composed in series; Between power brick, be connected with respectively voltage signal acquisition point An1, An2, An3; Cell bag D0m, Dm1, Dm2, Dm3 connect the BMS card reader 22 in C-size battery case 2 by power supply lead wire 23.
1, determining after the needed operating voltage of car load and electric automobile power, according to UB+ principle design cell bag; The terminal voltage that makes each cell bag is n power brick for 1/nUB+, and serial connection meets voltage request, with m branch road and fill the requirement of sufficient electric current.
2, device the battery operated condition monitoring system BMS1 card reader of battery case, BMS card reader with certain frequency to case in voltage signal A11, A12...A73 and each branch current signal I F01-I F0m gather, the signal value collecting and the thresholding being set in BMS card reader are in advance compared to the rejection of data in domain value range.Data record the storage of thresholding will be exceeded.
3, vehicle fill while changing electricity or shut down condition under, the fault data (namely exceeding the image data of thresholding) that can read easily record in BMS card reader carries out, after reductive analysis, retaining or removing, and prepares when again carrying out.
4, because the cell characteristic in cell bag can not be undergone mutation, so bag is only accomplished in the collection of voltage, current signal.After power brick shows extremely, in bag, cell is really accurate is carried out under car by professional with reparation.
5, said structure form has been avoided in automobilism the abnormal self-regeneration circuit of cell, thereby make on-vehicle battery composition, this declines greatly, and the difficulty of battery maintenance management is alleviated.
Claims (2)
1. a power battery of pure electric automobile group for LiMn2O4 monomer cylindrical battery composition, is made up of a battery case (1), C-size battery case (2), controller (3); It is characterized in that, in a battery case (1), be parallel with the first electric energy output branch road, the second electric energy output branch road, the 3rd electric energy output branch road; Article at least three, after electric energy output branch circuit parallel connection, form the gross power fan-out capability of a battery case (1), and connect the output interface (UB+, UB-) of a battery case by a battery case current diverter (F1);
In C-size battery case (2), be parallel with the 4th electric energy output branch road, the 5th electric energy output branch road, the 6th electric energy output branch road, the 7th electric energy output branch road, the 8th electric energy output branch road; Article at least five, after electric energy output branch circuit parallel connection, form the gross power fan-out capability of C-size battery case (2), and connect the output interface (uB+, uB-) of C-size battery case by C-size battery tank current shunt (F);
The gross power fan-out capability parallel connection of the gross power fan-out capability of a battery case (1) and C-size battery case (2), and connect the direct-flow input end (B+, B-) of controller (3).
2. according to the power battery of pure electric automobile group of LiMn2O4 monomer cylindrical battery composition claimed in claim 1, it is characterized in that, the first electric energy output branch road is to be composed in series by the cell bag of same model (D01, D11, D12, D1n) and branch road shunt (F01); Between power brick, be connected with respectively voltage signal acquisition point (A11, A12, A1n);
The cell bag of the second electric energy output route same model (D02, D21, D22, D2n) and branch road shunt (F02) are composed in series; Between power brick, be connected with respectively voltage signal acquisition point (A21, A22, A23);
The cell bag of a 3rd electric energy output route same model (D03, D31, D32, D3n) and branch road shunt (F03) are composed in series; Between power brick, be connected with respectively voltage signal acquisition point (A31, A32, A33); Cell bag (D03, D31, D32, D3n) is connected the BMS card reader (22) in a battery case (1) by power supply lead wire (12);
The cell bag of a 4th electric energy output route same model (D04, D41, D42, D4n) and branch road shunt (F04) are composed in series; Between power brick, be connected with respectively voltage signal acquisition point (A41, A42, A4n);
The cell bag of a 5th electric energy output route same model (D05, D51, D52, D5n) and branch road shunt (F05) are composed in series; Between power brick, be connected with respectively voltage signal acquisition point (A51, A52, A53);
The cell bag of a 6th electric energy output route same model (D06, D61, D62, D6n) and branch road shunt (F06) are composed in series; Between power brick, be connected with respectively voltage signal acquisition point (A61, A62, A63);
The cell bag of a 7th electric energy output route same model (D07, D71, D72, D7n) and branch road shunt (F07) are composed in series; Between power brick, be connected with respectively voltage signal acquisition point (A71, A72, A73);
Cell bag (D0m, Dm1, Dm2, Dm3) and the branch road shunt (F0m) of a 8th electric energy output route same model are composed in series; Between power brick, be connected with respectively voltage signal acquisition point (An1, An2, An3); Cell bag (D0m, Dm1, Dm2, Dm3) is connected the BMS card reader (22) in C-size battery case (2) by power supply lead wire (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320751756.0U CN203707281U (en) | 2013-11-26 | 2013-11-26 | Pure electric vehicle power battery back composed of lithium manganate monomer cylindrical batteries |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320751756.0U CN203707281U (en) | 2013-11-26 | 2013-11-26 | Pure electric vehicle power battery back composed of lithium manganate monomer cylindrical batteries |
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| CN203707281U true CN203707281U (en) | 2014-07-09 |
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| CN201320751756.0U Expired - Fee Related CN203707281U (en) | 2013-11-26 | 2013-11-26 | Pure electric vehicle power battery back composed of lithium manganate monomer cylindrical batteries |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2013
- 2013-11-26 CN CN201320751756.0U patent/CN203707281U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 Termination date: 20141126 |
|
| EXPY | Termination of patent right or utility model |