CN112582692A - Power battery system - Google Patents
Power battery system Download PDFInfo
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- CN112582692A CN112582692A CN202011281923.0A CN202011281923A CN112582692A CN 112582692 A CN112582692 A CN 112582692A CN 202011281923 A CN202011281923 A CN 202011281923A CN 112582692 A CN112582692 A CN 112582692A
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- Prior art keywords
- battery pack
- power
- main
- main battery
- auxiliary
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Links
- 238000001514 detection method Methods 0.000 claims abstract description 9
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 21
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 21
- 229910052744 lithium Inorganic materials 0.000 claims description 21
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 claims description 12
- 230000009466 transformation Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 description 2
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- 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
- 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
- H01M10/46—Accumulators structurally combined with charging apparatus
-
- 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
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte 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
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a power battery system, comprising: a main battery pack and an auxiliary battery pack; the battery detection module is used for acquiring information of the main battery pack and information of the auxiliary battery pack; the judging module is used for judging the working state of the battery pack according to the information of the main battery pack and the information of the auxiliary battery pack; and the power supply circuit is connected with the main battery pack and/or the auxiliary battery pack according to the working state of the battery packs, so that the main battery pack and/or the auxiliary battery pack supply power for the motor. The power battery system provided by the invention has the advantages that the hybrid battery is adopted, and various types of batteries are balanced.
Description
Technical Field
The invention belongs to the field of electric buses, and particularly relates to a power battery system.
Background
For car enterprises and public transport users, the most important indexes of the power battery are safety, energy density, rate capability, cost and cycle number in turn, wherein the safety is the primary index of overwhelming everything.
At present, lithium iron phosphate batteries are adopted by most customers in the domestic pure electric public transport market, and lithium titanate batteries are selected by a small number of customers. The lithium titanate battery has long cycle life which can reach 20000 times, is 5 times that of the lithium iron phosphate battery, and the lithium titanate battery has very good charge and discharge performance, the charge and discharge multiplying power is more than 3C, even can reach 10C, and the low-temperature charge and discharge characteristics of the lithium titanate battery are also very excellent. Lithium titanate batteries are well suited for use on public transport, but lithium titanate has low energy density and high price.
The bus with the lithium titanate batteries has excellent charge and discharge performance, the charge time of the bus in a quick charge mode can be controlled within 15 minutes, and the bus can instantly discharge with high magnification during discharge so as to meet certain limit working conditions of the bus, so that the bus is very suitable for the running working conditions of the bus, but the lithium titanate batteries have low energy density, and the storage capacity of the lithium titanate batteries under the configuration of the same battery weight is lower than that of the lithium iron phosphate batteries.
Disclosure of Invention
The invention aims to provide a power battery system, which aims to solve the problems of low capacity of a lithium titanate battery and long charging time of a lithium iron phosphate battery.
In order to achieve the purpose, the specific technical scheme of the power battery system is as follows:
a power battery system, comprising:
a main battery pack and an auxiliary battery pack;
the battery detection module is used for acquiring information of the main battery pack and information of the auxiliary battery pack;
the judging module is used for judging the working state of the battery pack according to the information of the main battery pack and the information of the auxiliary battery pack;
and the power supply circuit is connected with the main battery pack and/or the auxiliary battery pack according to the working state of the battery packs, so that the main battery pack and/or the auxiliary battery pack supply power for the motor.
Further, the power battery system also comprises a power detection module for detecting the required power of the whole vehicle; the judging module judges the running state of the vehicle according to the required power of the whole vehicle; and the power supply circuit is connected with the main battery pack and/or the auxiliary battery pack according to the working state of the battery pack and the running state of the vehicle, so that the main battery pack and/or the auxiliary battery pack supply power for the motor.
Further, the information of the main battery pack comprises the charge state of the main battery pack, and the information of the auxiliary battery pack is the charge state of the auxiliary battery pack.
Further, according to the required power of the whole vehicle, the vehicle running state is judged, and the method comprises the following steps: and comparing the required power of the whole vehicle with the output standard power of the main battery pack.
Further, connecting the main battery pack and/or the auxiliary battery pack according to the working state of the battery pack and the driving state of the vehicle to enable the main battery pack and/or the auxiliary battery pack to supply power to the motor, comprising:
when the charge state of the main battery pack is greater than a rated threshold value and the required power of the whole vehicle is less than the output standard power of the main battery pack, the power supply circuit is connected with the main battery pack, and the main battery pack supplies power to the motor;
when the charge state of the main battery pack is greater than a rated threshold value and the required power of the whole vehicle is greater than the output standard power of the main battery pack, the power supply circuit is connected with the main battery pack and the auxiliary battery pack at the same time, and the main battery pack and the auxiliary battery pack supply power to the motor at the same time;
when the charge state of the main battery pack is larger than the charge threshold, the main battery pack supplies power to the motor, and the auxiliary battery pack is closed.
Furthermore, the power battery system also comprises a voltage transformation module, and the voltage transformation module is electrically connected with the auxiliary battery pack to ensure that the working voltage output by the auxiliary battery pack is the same as the working voltage output by the main battery pack.
Furthermore, the main battery pack and the auxiliary battery pack are respectively and electrically connected with an independent charging module.
Furthermore, the main battery pack is a lithium titanate battery, and the auxiliary battery pack is a lithium iron phosphate battery.
The power battery system of the invention has the following advantages:
1. the power battery system comprises a lithium titanate battery system and a lithium iron phosphate battery system.
2. The lithium titanate battery system can discharge independently and can also discharge simultaneously with the lithium iron phosphate battery system.
3. The lithium titanate battery system and the lithium iron phosphate battery system are separately charged simultaneously, so that the charging time is shortened.
Drawings
FIG. 1 is a schematic diagram of a power battery system according to the present invention.
The notation in the figure is:
1. a master battery pack; 2. a sub-battery pack; 3. a battery detection module; 4. a power detection module; 5. a judgment module; 6. a power supply circuit; 7. a voltage transformation module; 8. and a charging module.
Detailed Description
For a better understanding of the objects, structure and function of the invention, a power battery system according to the invention will be described in more detail below with reference to the accompanying drawings.
As shown in fig. 1, the power battery system of the present invention includes:
a main battery pack 1 and an auxiliary battery pack 2;
the battery detection module 3 is used for acquiring information of the main battery pack and information of the auxiliary battery pack;
the judging module 5 is used for judging the working state of the battery pack according to the information of the main battery pack and the information of the auxiliary battery pack;
and the power supply circuit 6 is connected with the main battery pack 1 and/or the auxiliary battery pack 2 according to the working state of the battery packs, so that the main battery pack 1 and/or the auxiliary battery pack 2 can supply power for the motor.
The main battery pack information comprises the charge state of the main battery pack 1, and the auxiliary battery pack information is the charge state of the auxiliary battery pack. And main group battery 1 is the lithium titanate battery, and vice group battery 2 is the lithium iron phosphate battery to not only compromise the high charge-discharge rate of lithium titanate battery system, the long-life strong point but also compromise the high energy density of lithium iron phosphate battery system, low-cost advantage. Thereby compare in simple iron phosphate lithium battery system can shorten the operating efficiency that charge time improves the vehicle, fill the availability factor of electric pile and prolong battery system's live time and improve economic nature, thereby compare in simple lithium titanate battery system and can improve the single continuous mileage that system energy density increased the vehicle and reduce battery system cost and improve economic nature.
The power battery system further includes:
the power detection module 4 is used for detecting the required power of the whole vehicle; the judging module 5 judges the running state of the vehicle according to the required power of the whole vehicle;
and the power supply circuit 6 is connected with the main battery pack 1 and/or the auxiliary battery pack 2 according to the working state of the battery packs and the running state of the vehicle, so that the main battery pack 1 and/or the auxiliary battery pack 2 can supply power to the motor.
According to the required power of whole car, judge the vehicle state of traveling, include: and comparing the required power of the whole vehicle with the output standard power of the lithium titanate battery system.
According to the working state of the battery pack and the running state of the vehicle, the main battery pack 1 and/or the auxiliary battery pack 2 are connected, so that the main battery pack 1 and/or the auxiliary battery pack 2 can supply power for the motor, and the method comprises the following steps:
when the charge state of the main battery pack 1 is greater than a rated threshold value and the required power of the whole vehicle is less than the output standard power of the lithium titanate battery system, the power supply circuit 6 is connected with the main battery pack 1, and the main battery pack 1 supplies power to the motor;
when the charge state of the main battery pack 1 is larger than a rated threshold value and the required power of the whole vehicle is larger than the output standard power of the lithium titanate battery system, the power supply circuit 6 is connected with the main battery pack 1 and the auxiliary battery pack 2 at the same time, and the main battery pack 1 and the auxiliary battery pack 2 supply power to the motor at the same time;
when the charge state of the main battery pack 1 is smaller than a rated threshold value, the power supply circuit 6 is connected with the auxiliary battery pack 2, the auxiliary battery pack 2 supplies power to the motor, the auxiliary battery pack 2 is connected with the main battery pack 1, the main battery pack 1 supplies power to the auxiliary battery pack 2, and when the charge state of the main battery pack 1 is larger than the charge threshold value, the main battery pack 1 supplies power to the motor, and the auxiliary battery pack 2 is closed.
Typically, the nominal threshold is 30% and the charge threshold is 50%.
The power battery system also comprises a voltage transformation module 7, wherein the voltage transformation module 7 is electrically connected with the auxiliary battery pack 2, so that the working voltage output by the auxiliary battery pack 2 is the same as the working voltage output by the main battery pack 1. The voltage transformation module 7 is a bidirectional DCDC.
The main battery pack 1 and the auxiliary battery pack 2 are respectively electrically connected with an independent charging module 8 to accelerate the charging speed.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (12)
1. A power battery system, comprising:
a main battery pack (1) and an auxiliary battery pack (2);
the battery detection module (3) is used for acquiring information of the main battery pack and information of the auxiliary battery pack;
the judging module (5) is used for judging the working state of the battery pack according to the information of the main battery pack and the information of the auxiliary battery pack;
and the power supply circuit (6) is connected with the main battery pack (1) and/or the auxiliary battery pack (2) according to the working state of the battery packs, so that the main battery pack (1) and/or the auxiliary battery pack (2) can supply power to the motor.
2. The power battery system according to claim 1, characterized by further comprising a power detection module (4) for detecting a required power of the entire vehicle; the judging module (5) judges the running state of the vehicle according to the required power of the whole vehicle; and the power supply circuit (6) is connected with the main battery pack (1) and/or the auxiliary battery pack (2) according to the working state of the battery pack and the running state of the vehicle, so that the main battery pack (1) and/or the auxiliary battery pack (2) can supply power to the motor.
3. The power battery system of claim 2, wherein the primary battery pack information comprises a primary battery pack state of charge and the secondary battery pack information is a secondary battery pack state of charge.
4. The power battery system of claim 3, wherein the determining the vehicle driving state based on the power demand of the entire vehicle comprises: and comparing the required power of the whole vehicle with the output standard power of the main battery pack (1).
5. Power battery system according to claim 4, characterized in that connecting the main battery pack (1) and/or the auxiliary battery pack (2) in order to power the electric machine from the main battery pack (1) and/or the auxiliary battery pack (2) depending on the battery pack operating state and the vehicle driving state comprises:
when the charge state of the main battery pack is larger than a rated threshold value and the required power of the whole vehicle is smaller than the output standard power of the main battery pack (1), the power supply circuit (6) is connected with the main battery pack (1), and the main battery pack (1) supplies power to the motor.
6. Power battery system according to claim 4, characterized in that connecting the main battery pack (1) and/or the auxiliary battery pack (2) in order to power the electric machine from the main battery pack (1) and/or the auxiliary battery pack (2) depending on the battery pack operating state and the vehicle driving state comprises:
when the charge state of the main battery pack is larger than a rated threshold value and the required power of the whole vehicle is larger than the output standard power of the main battery pack (1), the power supply circuit (6) is connected with the main battery pack (1) and the auxiliary battery pack (2) at the same time, and the main battery pack (1) and the auxiliary battery pack (2) supply power to the motor at the same time.
7. Power battery system according to claim 4, characterized in that connecting the main battery pack (1) and/or the auxiliary battery pack (2) in order to power the electric machine from the main battery pack (1) and/or the auxiliary battery pack (2) depending on the battery pack operating state and the vehicle driving state comprises:
when the charge state of the main battery pack is smaller than the rated threshold value, the power supply circuit (6) is connected with the auxiliary battery pack (2), and the auxiliary battery pack (2) supplies power to the motor.
8. Power battery system according to claim 7, characterized in that the secondary battery (2) is connected to the main battery (1) and the main battery (1) powers the secondary battery (2) when the main battery state of charge is less than the nominal threshold.
9. The power battery system according to claim 8, characterized in that the main battery pack (1) powers the electric machine and the auxiliary battery pack (2) is switched off when the main battery pack state of charge is greater than the charging threshold.
10. The power battery system according to claim 1, characterized in that the power battery system further comprises a voltage transformation module (7), the voltage transformation module (7) being electrically connected to the secondary battery pack (2) such that the operating voltage output by the secondary battery pack (2) is the same as the operating voltage output by the primary battery pack (1).
11. Power battery system according to claim 1, characterized in that the main battery pack (1) and the secondary battery pack (2) are electrically connected with an independent charging module (8), respectively.
12. Power battery system according to claim 1, characterized in that the main battery pack (1) is a lithium titanate battery and the auxiliary battery pack (2) is a lithium iron phosphate battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011281923.0A CN112582692A (en) | 2020-11-17 | 2020-11-17 | Power battery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011281923.0A CN112582692A (en) | 2020-11-17 | 2020-11-17 | Power battery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112582692A true CN112582692A (en) | 2021-03-30 |
Family
ID=75122695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011281923.0A Pending CN112582692A (en) | 2020-11-17 | 2020-11-17 | Power battery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112582692A (en) |
-
2020
- 2020-11-17 CN CN202011281923.0A patent/CN112582692A/en active Pending
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