CN201587377U - Lithium iron phosphate battery management system - Google Patents
Lithium iron phosphate battery management system Download PDFInfo
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- CN201587377U CN201587377U CN2009203191433U CN200920319143U CN201587377U CN 201587377 U CN201587377 U CN 201587377U CN 2009203191433 U CN2009203191433 U CN 2009203191433U CN 200920319143 U CN200920319143 U CN 200920319143U CN 201587377 U CN201587377 U CN 201587377U
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- battery
- management system
- main control
- control module
- lithium cell
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Abstract
The utility model provides a lithium iron phosphate battery management system, belongs to the technical field of electronics, and solves the problems in the prior vehicle battery management system of complex structure, low control precision and poor stability. The lithium iron phosphate battery management system is arranged between a vehicle battery and a whole vehicle control system; the vehicle battery comprises a plurality of battery packs connected in series in sequence; a vehicle power supply is connected with a high-voltage distribution box; each battery pack comprises a plurality of single batteries; the battery management system comprises a main control module and a plurality of A/D isolated acquisition modules, and the A/D isolated acquisition modules are arranged on the battery packs respectively and used for acquiring information of the battery packs; the A/D isolated acquisition modules are connected with the main control module through a first CAN bus; the main control module is connected with the whole vehicle control system through a second CAN bus; and a total voltage sensor and a total current sensor are arranged in the high-voltage distribution box and are also connected to the main control module. The utility model has the advantages of reasonable design, simple structure, and greatly prolonged service life of the battery.
Description
Technical field
The utility model belongs to electronic technology field, relates to battery management system, especially relates to a kind of ferric phosphate lithium cell management system.
Background technology
The automobile power source that is used for electronlmobil (EV) and mixed power electric car (HEV) is made of battery pack, and battery pack is formed by connecting by a plurality of cells.Although automobile power system is regarded battery pack as single high-tension battery, all whole battery group is charged at every turn and discharge, battery control system must the independent situation of considering each battery.The capacity of battery regulation is meant the electric weight that battery can provide to zero charge condition from 100% charge condition.Be charged to 100% charge condition or discharge into zero charge condition and can shorten battery life rapidly, therefore should carefully manage battery to avoid charging fully or discharge regime fully.If after a capacity of cell in the battery pack a shade below other batteries, is passed through a plurality of charge/discharge cycle so, its charge condition will depart from other battery gradually.If the charge condition of this battery not periodically with other battery equilibrium, it enters the deep discharge state the most at last so, thereby causes damaging, and finally forms battery failure.For preventing this from occurring, the voltage of each battery all must monitor, to determine charge condition.In addition, must there be a device allow the independent charge or discharge of battery, with the charge condition of these batteries of balance.
For this reason, people have carried out long-term exploration, have proposed various solutions.For example, Chinese patent literature discloses a kind of battery management system [application number: 200610164524.X] of vehicle, comprise a plurality of from control unit, each is described to comprise voltage detection unit from control unit, voltage detection unit detects the charging voltage value of respective battery unit in a plurality of battery units, thereby the charge condition of respective battery unit is managed.Battery management system also comprises main control unit, and main control unit comprises the current detecting unit of the representative current value that detects all battery units, this main control unit be connected from control unit, manage with charge condition all battery units.
Though such scheme has improved the performance of Vehicle Power to a certain extent, still exist complex structure, control accuracy is not high, poor stability, the service life of battery is than technical matterss such as weak points.
Summary of the invention
The purpose of this utility model is at the problems referred to above, provides a kind of reasonable in design, simple in structure, can control battery charging and discharging opportunity exactly, prolongs the battery ferric phosphate lithium cell management system in service life greatly.
For achieving the above object, the utility model has adopted following technical proposal: this ferric phosphate lithium cell management system, be arranged between Vehicle Power and the whole-control system, Vehicle Power comprises several, and series connected battery group and Vehicle Power and high-tension distribution box link successively, each battery pack comprises several cells respectively, it is characterized in that, this battery management system comprises that a main control module and several are separately positioned on the A/D isolation acquisition module that is used to gather each battery pack information on each battery pack, described A/D isolates acquisition module and links by a CAN bus and main control module, described main control module links by the 2nd CAN bus and whole-control system, also is connected with the total voltage sensor and the total current sensor that are arranged in the high-tension distribution box on main control module.
In above-mentioned ferric phosphate lithium cell management system, described main control module comprises signal processing unit, above-mentioned total voltage sensor and total current sensor are connected on the signal processing unit, and also being connected with on signal processing unit can be according to the volumetric analysis unit of detected real-time current signal analysis battery real time capacity.
In above-mentioned ferric phosphate lithium cell management system, also be connected with the temperature detecting unit that can detect vehicle power work temperature on the described main control module, described temperature detecting unit links by signal processing unit and volumetric analysis unit.
In above-mentioned ferric phosphate lithium cell management system, described A/D isolates acquisition module and comprises series connected successively Signal Spacing collecting unit, filter unit and level conversion unit.
In above-mentioned ferric phosphate lithium cell management system, be connected with the high pressure earth detector on the described total voltage sensor, described high pressure earth detector and accessory feed link; Described total current sensor and another accessory feed link.Battery management system itself also is the load of battery, and its lower working current can improve system effectiveness, and lower standby current can prevent the battery over discharge behind automobile flameout.
In above-mentioned ferric phosphate lithium cell management system, also be connected with the real-time timepiece chip that extends out on the described main control module, this real-time timepiece chip can write down standing time and battery information is stored when battery management system cuts off the power supply.
In above-mentioned ferric phosphate lithium cell management system, also be provided with CAN bus spare interface and control spare interface on the described main control module.
In above-mentioned ferric phosphate lithium cell management system, described main control module is 16 micro controller systems.
Compared with prior art, the advantage of this ferric phosphate lithium cell management system is: 1, simple in structure, the rationally distributed electromagnetic compatibility of each several part components and parts is good, and electromagnetic interference is few.2, conversion speed is fast, and operation is smooth, and control process is accurate.3, signal acquisition module is reasonable in design, and the signal transmission is unimpeded.4, reserve expansion interface, the favorable expandability of total system is convenient to carry out subsequent development.5, be connected with accessory feed respectively on total current sensor and the high pressure earth detector, the fluctuation of Vehicle Power is had the good restraining effect.
Description of drawings
Fig. 1 is the structured flowchart that the utility model provides.
Among the figure, battery pack 1, whole-control system 2, high-tension distribution box 3, main control module 4, signal processing unit 41, volumetric analysis unit 42, real-time timepiece chip 40, CAN bus spare interface 4a, control spare interface 4b, A/D isolate acquisition module 5, Signal Spacing collecting unit 51, filter unit 52, level conversion unit 53, a CAN bus 6, the 2nd CAN bus 7, total voltage sensor 9, high pressure earth detector 90, total current sensor 10, temperature detecting unit 11.
The specific embodiment
As shown in Figure 1, this ferric phosphate lithium cell management system is arranged between Vehicle Power and the whole-control system 2.Vehicle Power comprise several successively series connected battery group 1 and Vehicle Power and high-tension distribution box 3 link, each battery pack 1 comprises several cells respectively.This battery management system comprises that a main control module 4 and several are separately positioned on the A/D isolation acquisition module 5 that is used to gather each battery pack 1 information on each battery pack 1.A/D isolates acquisition module 5 and links with main control module 4 by a CAN bus 6, and main control module 4 links with whole-control system 2 by the 2nd CAN bus 7.A/D isolates acquisition module 5 and comprises series connected successively Signal Spacing collecting unit 51, filter unit 52 and level conversion unit 53.On main control module 4, also be connected with the total voltage sensor 9 and the total current sensor 10 that are arranged in the high-tension distribution box 3.
Main control module 4 comprises signal processing unit 41, above-mentioned total voltage sensor 9 and total current sensor 10 are connected on the signal processing unit 41, and also being connected with on signal processing unit 41 can be according to the volumetric analysis unit 42 of detected real-time current signal analysis battery real time capacity.Also be connected with the temperature detecting unit 11 that can detect vehicle power work temperature on the main control module 4, described temperature detecting unit 11 links by signal processing unit 41 and volumetric analysis unit 42.
Also be connected with the real-time timepiece chip 40 that extends out on the main control module 4, this real-time timepiece chip 40 can write down standing time and battery information is stored when battery management system cuts off the power supply.Also be provided with CAN bus spare interface 4a and control spare interface 4b on the main control module 4.A CAN bus 6 and the 2nd CAN bus 7 in the present embodiment all adopt air plug to link.
In the present embodiment, main control module 4 is 16 micro controller systems.Be connected with high pressure earth detector 90 on the total voltage sensor 9, high pressure earth detector 90 links with accessory feed, and total current sensor 10 links with another accessory feed.
Specific embodiment described herein only is that the utility model spirit is made casehistory.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.
Although this paper has used battery pack 1, whole-control system 2, high-tension distribution box 3, main control module 4, signal processing unit 41, volumetric analysis unit 42, real-time timepiece chip 40, CAN bus spare interface 4a, control spare interface 4b, A/D to isolate acquisition module 5, Signal Spacing collecting unit 51, filter unit 52, level conversion unit 53, a CAN bus 6, the 2nd CAN bus 7, total voltage sensor 9, high pressure earth detector 90, total current sensor 10, temperature detecting unit 11 terms morely, do not get rid of the possibility of using other term.Using these terms only is in order to describe and explain essence of the present utility model more easily; They are construed to any additional restriction all is contrary with the utility model spirit.
Claims (8)
1. ferric phosphate lithium cell management system, be arranged between Vehicle Power and the whole-control system (2), Vehicle Power comprises several, and series connected battery group (1) and Vehicle Power and high-tension distribution box (3) link successively, each battery pack (1) comprises several cells respectively, it is characterized in that, this battery management system comprises that a main control module (4) and several are separately positioned on the A/D isolation acquisition module (5) that is used to gather each battery pack (1) information on each battery pack (1), described A/D isolates acquisition module (5) and links by a CAN bus (6) and main control module (4), described main control module (4) links by the 2nd CAN bus (7) and whole-control system (2), also is connected with the total voltage sensor (9) and the total current sensor (10) that are arranged in the high-tension distribution box (3) on main control module (4).
2. ferric phosphate lithium cell management system according to claim 1, it is characterized in that, described main control module (4) comprises signal processing unit (41), above-mentioned total voltage sensor (9) and total current sensor (10) are connected on the signal processing unit (41), and also being connected with on signal processing unit (41) can be according to the volumetric analysis unit (42) of detected real-time current signal analysis battery real time capacity.
3. ferric phosphate lithium cell management system according to claim 2, it is characterized in that, also be connected with the temperature detecting unit (11) that can detect vehicle power work temperature on the described main control module (4), described temperature detecting unit (11) links by signal processing unit (41) and volumetric analysis unit (42).
4. according to claim 1 or 2 or 3 described ferric phosphate lithium cell management systems, it is characterized in that described A/D isolates acquisition module (5) and comprises series connected successively Signal Spacing collecting unit (51), filter unit (52) and level conversion unit (53).
5. ferric phosphate lithium cell management system according to claim 4 is characterized in that, is connected with high pressure earth detector (90) on the described total voltage sensor (9), and described high pressure earth detector (90) links with accessory feed; Described total current sensor (10) links with another accessory feed.
6. ferric phosphate lithium cell management system according to claim 4, it is characterized in that, also be connected with the real-time timepiece chip (40) that extends out on the described main control module (4), this real-time timepiece chip (40) can write down standing time and battery information is stored when battery management system cuts off the power supply.
7. according to claim 1 or 2 or 3 described ferric phosphate lithium cell management systems, it is characterized in that, also be provided with CAN bus spare interface (4a) and control spare interface (4b) on the described main control module (4).
8. ferric phosphate lithium cell management system according to claim 7 is characterized in that, described main control module (4) is 16 micro controller systems.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203191433U CN201587377U (en) | 2009-12-30 | 2009-12-30 | Lithium iron phosphate battery management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203191433U CN201587377U (en) | 2009-12-30 | 2009-12-30 | Lithium iron phosphate battery management system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201587377U true CN201587377U (en) | 2010-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203191433U Expired - Fee Related CN201587377U (en) | 2009-12-30 | 2009-12-30 | Lithium iron phosphate battery management system |
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| CN (1) | CN201587377U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102653263A (en) * | 2011-03-03 | 2012-09-05 | 北汽福田汽车股份有限公司 | Electric automobile power battery management system and method |
| CN102751746A (en) * | 2011-04-22 | 2012-10-24 | 上海中科国嘉储能技术有限公司 | Battery management system and control method thereof |
| CN103072489A (en) * | 2011-10-26 | 2013-05-01 | 北京基业达电气有限公司 | Electric automobile battery management system |
| EP2613422A1 (en) * | 2011-10-05 | 2013-07-10 | Nichicon Corporation | Stationary charging system |
| CN104917276A (en) * | 2015-06-11 | 2015-09-16 | 三峡大学 | Photovoltaic energy storage BMS system |
-
2009
- 2009-12-30 CN CN2009203191433U patent/CN201587377U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102653263A (en) * | 2011-03-03 | 2012-09-05 | 北汽福田汽车股份有限公司 | Electric automobile power battery management system and method |
| CN102653263B (en) * | 2011-03-03 | 2014-08-06 | 北汽福田汽车股份有限公司 | Electric automobile power battery management system and method |
| CN102751746A (en) * | 2011-04-22 | 2012-10-24 | 上海中科国嘉储能技术有限公司 | Battery management system and control method thereof |
| CN102751746B (en) * | 2011-04-22 | 2015-02-11 | 上海中科国嘉储能技术有限公司 | Battery management system |
| EP2613422A1 (en) * | 2011-10-05 | 2013-07-10 | Nichicon Corporation | Stationary charging system |
| EP2613422A4 (en) * | 2011-10-05 | 2013-12-11 | Nichicon Corp | Stationary charging system |
| CN103072489A (en) * | 2011-10-26 | 2013-05-01 | 北京基业达电气有限公司 | Electric automobile battery management system |
| CN104917276A (en) * | 2015-06-11 | 2015-09-16 | 三峡大学 | Photovoltaic energy storage BMS system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100922 Termination date: 20131230 |