CN111762061A - Power battery pack balance maintenance method and balance maintenance instrument - Google Patents
Power battery pack balance maintenance method and balance maintenance instrument Download PDFInfo
- Publication number
- CN111762061A CN111762061A CN201910258883.9A CN201910258883A CN111762061A CN 111762061 A CN111762061 A CN 111762061A CN 201910258883 A CN201910258883 A CN 201910258883A CN 111762061 A CN111762061 A CN 111762061A
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- battery pack
- power
- power battery
- balance maintenance
- power supply
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- 238000012423 maintenance Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000005070 sampling Methods 0.000 claims abstract description 5
- 238000004891 communication Methods 0.000 claims description 12
- 239000004973 liquid crystal related substance Substances 0.000 claims description 7
- 238000007599 discharging Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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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
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to a power battery pack balance maintenance method and a balance maintenance instrument, which are used for sampling voltages of single battery cells in a power battery pack, analyzing the charge states of the single battery cells of the power battery and the maximum voltage difference in the battery pack so as to judge the health state of the power battery pack, charging and discharging the single battery cells through an independent power supply connected to each single battery cell of the power battery pack to ensure that the charge states of all the single battery cells are consistent, and reducing the maximum voltage difference in the battery pack to be below a proper value, thereby realizing the consistency of the power battery pack, achieving the aim of balance maintenance and supporting the balance maintenance of any battery pack below 360 strings.
Description
Technical Field
The invention relates to a balance maintenance method and a balance maintenance instrument for a power battery pack, and belongs to the field of maintenance of power batteries of electric automobiles.
Background
With the development of electric automobiles, the application of power batteries is increasing, battery inconsistency caused by various factors such as the production and manufacturing process and the use conditions of the power batteries is inevitable, the most intuitive problem of the battery inconsistency is that the endurance mileage of the electric automobiles is reduced, the deeper problem is that the service life of the batteries is shortened and the safety is deteriorated, and the endurance mileage and the safety of the electric automobiles are undoubtedly fatal factors of success or failure, so the problem of the consistency of the batteries of the electric automobiles has to be emphasized.
In order to solve the consistency problem of the power battery pack of the electric automobile, I provide a method for regularly and uniformly maintaining the power battery, which can effectively solve the consistency problem of the power battery pack and is provided on the basis of research on basic characteristics of the battery.
The invention is based on the thought, provides a method for battery equalization maintenance, adopts the same number of charging power supplies as the number of single cells in a battery pack to carry out charging or discharging maintenance on the single cells, monitors the maintenance process through intelligent control, and simultaneously provides an equalization maintenance instrument for realizing the equalization maintenance method.
Disclosure of Invention
The invention aims to provide a balance maintenance method and a balance maintenance instrument for a power battery, which are used for carrying out balance maintenance on a battery pack consisting of a plurality of single battery cells so as to improve the consistency of the charge state of the battery pack and further ensure the endurance mileage and the safety performance of the power battery pack.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a power battery equalization maintenance method, which is characterized by comprising the following steps:
(1) sampling the voltage of a single battery cell in the power battery pack, analyzing the charge state of the single battery cell of the power battery and the maximum voltage difference in the battery pack, and judging the health state of the power battery pack;
(2) the single battery cells are charged or discharged through the independent power supply connected to each single battery cell of the power battery pack, so that the charge states of all the single battery cells are consistent, and the maximum voltage difference in the battery pack is reduced to be below a proper value, thereby realizing the consistency of the power battery pack and achieving the aim of balanced maintenance.
In order to realize the method, the invention provides a balance maintenance instrument for realizing the balance maintenance method of the power battery, which comprises a main control unit, a control module (T1-Tn), a power supply channel (P1-P12), a color liquid crystal touch screen (D), an audio decoding channel, a loudspeaker (Y), a microphone (M) and a CAN communication bus component (C);
each single battery cell is respectively connected with an independent power supply channel (P1-P12), and each power supply channel can be respectively started and stopped;
each 12 power supply channels form a control module (T1-Tn) which is controlled by a single chip microcomputer module in a unified way, and the single chip microcomputer module comprises 12 strings of battery pack single voltage sampling channels (S), a switch device (K1-K12) for controlling the starting and stopping of 12 power supply channels, a color liquid crystal touch screen interface, a CAN communication interface and a current output channel (B1-B12);
the main control unit comprises a main control CPU (A), a color liquid crystal touch screen interface (D), a loudspeaker (Y), an audio decoding channel and a CAN communication interface (C), wherein the CAN communication interface of the main control unit is connected with the CAN communication interfaces of all control modules through a CAN bus and CAN be connected with 32 control modules to the maximum;
each power channel is formed by connecting different numbers of independent power supplies (P1-1, P1-2 … P1-n) in parallel, so that different currents are output, and the maximum number of the independent power supplies can be connected in parallel with 32;
the main control unit realizes voice broadcast and maintenance of dynamic information through the audio decoding channel and the loudspeaker, receives user voice through the microphone, recognizes voice instructions and automatically completes user task instructions.
The invention has the beneficial effects that:
(1) the method has the advantages that the power battery pack can be rapidly judged, the state of the battery pack can be analyzed, the battery pack needing to be subjected to balanced maintenance can be rapidly balanced, and the voltage consistency of the single battery cells in the battery pack is ensured, so that the performance consistency of all the single battery cells in the power battery pack is improved;
(2) the device can help power battery application equipment such as an electric automobile and the like to improve the endurance mileage and improve the service life and safety of the power battery;
(3) the balance maintenance instrument provided by the invention CAN provide various current outputs by connecting the power supplies in parallel and the CAN bus of the module in a hanging manner, CAN perform balance maintenance on the battery packs of up to 360 strings at a time, and has a very wide application range.
Description of the drawings:
fig. 1 is a flow chart of the balance maintenance method proposed by the present invention.
Fig. 2 is a schematic block diagram of a main control unit of the balance maintenance instrument according to the present invention.
Fig. 3 is a schematic block diagram of a control module of the balance maintenance instrument according to the present invention.
The specific implementation mode is as follows:
in order to make the technical solution of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments, and the specific examples described herein are only for explaining the present invention and are not intended to limit the present invention.
Example (b):
1. the main control unit adopts STM32F429IGT6 produced by ST company as a main control CPU;
2. the liquid crystal touch display screen adopts a 7-inch 800 multiplied by 480RGB interface 24-bit display screen, and a capacitive touch screen is adopted for operation;
3. the WM8978 stereo multimedia digital signal codec is used as an audio editing code chip to collect microphone information and drive an 8-ohm BTL loudspeaker to output voice prompt information;
4. the CAN communication adopts TJA1050 as an interface chip, and 110 CAN communication devices CAN be connected to the maximum;
5. the power supply adopts a DC/DC self-excited isolating switch power supply and supports parallel output;
6. the control module adopts STM32F103VCT6 produced by ST company as a main control CPU;
7. the control module adopts LTC6803 produced by Linear company as a voltage acquisition chip and can acquire the voltage of the single battery cells of 1-12 battery packs in any string number.
Claims (2)
1. A balance maintenance method and a balance maintenance instrument for a power battery pack are provided, wherein the balance maintenance method for the power battery pack is characterized in that:
(1) sampling the voltage of a single battery cell in the power battery pack, analyzing the charge state of the single battery cell of the power battery and the maximum voltage difference in the battery pack, and judging the health state of the power battery pack;
(2) the single battery cells are charged and discharged through the independent power supply connected to each single battery cell of the power battery pack, so that the charge states of all the single battery cells are consistent, and the maximum voltage difference in the battery pack is reduced to be below a proper value, thereby realizing the consistency of the power battery pack and achieving the aim of balanced maintenance.
2. An equilibrium maintenance instrument for implementing the equilibrium maintenance method of the power battery pack according to claim 1, characterized in that:
(1) the balance maintenance instrument comprises a main control unit, a control module, a power supply channel, a color liquid crystal touch screen, an audio decoding channel, a loudspeaker, a microphone and a CAN communication bus;
(2) each single battery cell is respectively connected with an independent power supply channel, and each power supply channel can be respectively started and stopped;
(3) each 12 power supply channels form a control module which is uniformly controlled by a single chip microcomputer module, and the single chip microcomputer module comprises 12 strings of battery pack single voltage sampling channels, a switching device for controlling the starting and stopping of 12 power supply channels, a color liquid crystal touch screen interface and a CAN communication interface;
(4) the main control unit comprises a color liquid crystal touch screen interface, a loudspeaker, an audio decoding channel and a CAN communication interface, wherein the CAN communication interface of the main control unit is connected with the CAN communication interfaces of the control modules through a CAN bus and CAN be connected with 32 control modules to the maximum extent;
(5) each power channel is formed by connecting independent power supplies with different quantities in parallel, so that different currents are output, and 32 independent power supplies can be connected in parallel at most;
(6) the main control unit realizes voice broadcast and maintenance of dynamic information through the audio decoding channel and the loudspeaker, receives user voice through the microphone, recognizes voice instructions and automatically completes user task instructions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910258883.9A CN111762061A (en) | 2019-04-02 | 2019-04-02 | Power battery pack balance maintenance method and balance maintenance instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910258883.9A CN111762061A (en) | 2019-04-02 | 2019-04-02 | Power battery pack balance maintenance method and balance maintenance instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111762061A true CN111762061A (en) | 2020-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910258883.9A Pending CN111762061A (en) | 2019-04-02 | 2019-04-02 | Power battery pack balance maintenance method and balance maintenance instrument |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2393251Y (en) * | 1999-09-21 | 2000-08-23 | 陈信 | Capacity-adjustable charger |
| CN201478865U (en) * | 2009-08-14 | 2010-05-19 | 天津力神特种电源科技有限公司 | Improved charging balanced circuit |
| US20110234164A1 (en) * | 2010-03-29 | 2011-09-29 | Kimihiko Furukawa | Power supply device capable of equalizing electrical properties of batteries |
| CN102709964A (en) * | 2012-05-10 | 2012-10-03 | 许继集团有限公司 | Balance maintaining device of power battery set |
| CN103715722A (en) * | 2012-09-28 | 2014-04-09 | 毛广甫 | Power battery pack equalization maintenance system and method |
| WO2019042362A1 (en) * | 2017-08-31 | 2019-03-07 | 比亚迪股份有限公司 | Battery equalization system, vehicle, battery equalization method, and storage medium |
-
2019
- 2019-04-02 CN CN201910258883.9A patent/CN111762061A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2393251Y (en) * | 1999-09-21 | 2000-08-23 | 陈信 | Capacity-adjustable charger |
| CN201478865U (en) * | 2009-08-14 | 2010-05-19 | 天津力神特种电源科技有限公司 | Improved charging balanced circuit |
| US20110234164A1 (en) * | 2010-03-29 | 2011-09-29 | Kimihiko Furukawa | Power supply device capable of equalizing electrical properties of batteries |
| CN102709964A (en) * | 2012-05-10 | 2012-10-03 | 许继集团有限公司 | Balance maintaining device of power battery set |
| CN103715722A (en) * | 2012-09-28 | 2014-04-09 | 毛广甫 | Power battery pack equalization maintenance system and method |
| WO2019042362A1 (en) * | 2017-08-31 | 2019-03-07 | 比亚迪股份有限公司 | Battery equalization system, vehicle, battery equalization method, and storage medium |
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