CN102723754B - Identifying circuit and identifying method of broken line of battery pack acquisition line of battery management system - Google Patents
Identifying circuit and identifying method of broken line of battery pack acquisition line of battery management system Download PDFInfo
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- CN102723754B CN102723754B CN201210178528.9A CN201210178528A CN102723754B CN 102723754 B CN102723754 B CN 102723754B CN 201210178528 A CN201210178528 A CN 201210178528A CN 102723754 B CN102723754 B CN 102723754B
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Abstract
The invention discloses an identifying circuit and an identifying method of a broken line of a battery pack acquisition line of a battery management system. The identifying circuit comprises a voltage sampling chip, anode acquisition lines and cathode acquisition lines, wherein the anode acquisition lines are connected between a total anode end of the voltage sampling chip and each battery monomer of the battery pack; the cathode acquisition lines are connected between a total cathode end of the voltage sampling chip and each battery monomer of the battery pack; and switches which can be controlled independently are connected in series between each cathode acquisition line and each anode acquisition line. With the adoption of the identifying method, a broken acquisition line can be identified rapidly and conveniently. With the adoption of the identifying circuit and the identifying method, an acquisition line breaking fault can be reported and the number of the broken line can be reported, so that the maintenance is convenient, whether the acquisition line is broken can be judged in time, the precision in estimation of the left electricity quantity of a battery management system is improved, and the broadcasting on other functions such as overlow monomer voltage, overlow total voltage and the like is convenient.
Description
Technical field
The present invention relates to the improvement technology of a kind of battery management system for battery set management monitoring technique.
Background technology
Battery management system (BMS) is provided with collection line in the time of administration battery pack, for gathering the parameter of each battery in battery pack monomer.But current battery management system does not all gather line broken string recognition function, can not report timely this abnormal, and the dump energy of battery pack is taking minimum voltage as controlling threshold values, and this is to battery status estimation, battery failures forecast and battery maintenance.
Summary of the invention
In view of this, one of the technical problem to be solved in the present invention is to provide a kind of battery management system of realizing each break battery management system battery pack of judging of line that gathers in battery pack is gathered to the line identification circuit that breaks.
In order to solve the problems of the technologies described above, this technical problem adopts following scheme to solve:
A kind of battery management system battery pack gathers line broken string identification circuit, this identification circuit comprise a voltage sample chip and be connected in the total anode of this voltage sample chip and the each battery cell of battery pack between the each anodal each negative pole that gathers line, be connected between the total negative terminal of this voltage sample chip and the each battery cell of battery pack gather line, in each negative pole gathers line and each positive pole collection line, be all in series with separately controllable switch.
And, on each collection line, be all in series with divider resistance, be all connected with protection electric capacity at each battery cell two ends.
Another technical problem that the present invention will solve is to provide one can battery management system battery pack gather the recognition methods of line broken string, accurately identifies to express delivery which root and gathers line broken string.
In order to solve the problems of the technologies described above, this technical problem adopts following scheme to solve:
A kind of battery management system battery pack gathers the recognition methods of line broken string, and this recognition methods comprises the steps:
1), battery management system energising, the self-inspection of voltage sample chip, if self-inspection is normally, carries out next step;
2), detect the total anode of voltage sample chip and total negative terminal voltage, judge whether the total anode of voltage sample chip and total negative terminal exist broken string, if detect that all batteries monomer voltage is all 0, be judged as the total anode of voltage sample chip or total negative terminal broken string, otherwise be judged as the total anode of voltage sample chip and total negative terminal without broken string, enter following detection, judge that each battery cell gathers line broken string identification step;
3) if the 1st battery cell or N battery cell no-voltage detected, other battery cell has any one group of voltage normal, judges the 1st or N+1 root collection line broken string; If the 1st and all no-voltages of the 2nd battery cell detected, other has any Battery pack monomer voltage normal, judges that the 2nd gathers line broken string; Whether if (N-1) and all no-voltages of N battery cell, other has any Battery pack monomer voltage normal, judges that N root gathers line broken string, detect one by one thus N root collection line and break.
And, above-mentioned 2) be provided with total voltage detecting step before step, if this total voltage detecting step detect that all battery cell voltage is added and equal total voltage, judge that each collection line is all without breaking; Be less than total voltage if all monomer voltages are added, enter 3) step.
Compared with prior art, tool of the present invention has the following advantages:
1. can report and gather line disconnection fault, and report broken string wire size, maintain easily;
2. can judge in time whether gather line breaks, improve the precision of battery management system estimation dump energy;
3, make battery management system there is disconnection fault reporting functions, thereby facilitated the forecast of the functions such as other function is as too low in monomer voltage, total voltage is too low.
Brief description of the drawings
Fig. 1 is that embodiment of the present invention battery management system battery pack gathers line broken string identification circuit principle schematic.
Embodiment
For the ease of it will be appreciated by those skilled in the art that below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail:
It is the improvement on existing battery management system battery set management circuit that the battery management system battery pack that the present embodiment discloses gathers line broken string identification circuit, make it to have broken string recognition function, diagnose out quickly and easily and whether exist battery cell to gather line broken string and any bar broken string.
The circuit of the present embodiment design comprises a voltage sample chip 1 and the each anodal each negative pole that gathers line 4, be connected between the total negative terminal of this voltage sample chip 1 and the each battery cell 3 of battery pack that is connected between the total anode of this voltage sample chip 1 and the each battery cell 3 of battery pack gathers line 5, in each negative pole collection line 5 and each positive pole collection line, is all in series with separately controllable switch 6.And, on each collection line, be all in series with divider resistance 7, be all connected with protection electric capacity 8 at each battery cell 3 two ends.Detect recognizer by default control, battery management system control respectively gathers the break-make of switch 6 in line, and voltage sample chip 1 obtains the magnitude of voltage in corresponding collection line, gathers line broken string thereby identify which bar, and concrete recognition methods step is as follows:
1), battery management system energising, the self-inspection of voltage sample chip, if self-inspection is normally, carries out next step;
2), detect the total anode of voltage sample chip and total negative terminal voltage, judge whether the total anode of voltage sample chip and total negative terminal exist broken string, if detect that all batteries monomer voltage is all 0, be judged as the total anode of voltage sample chip or total negative terminal broken string, otherwise be judged as the total anode of voltage sample chip and total negative terminal without broken string, enter following detection, judge that each battery cell gathers line broken string identification step;
3) if the 1st battery cell or N battery cell no-voltage detected, other battery cell has any one group of voltage normal, judges the 1st or N+1 root collection line broken string; If the 1st and all no-voltages of the 2nd battery cell detected, other has any Battery pack monomer voltage normal, judges that the 2nd gathers line broken string; Whether if (N-1) and all no-voltages of N battery cell, other has any Battery pack monomer voltage normal, judges that N root gathers line broken string, detect one by one thus N root collection line and break.
And, above-mentioned 2) be provided with total voltage detecting step before step, if this total voltage detecting step detect that all battery cell voltage is added and equal total voltage, judge that each collection line is all without breaking; Be less than total voltage if all monomer voltages are added, enter 3) step.
In above-mentioned steps arranges, be also provided with a step in particular cases: in the time that the 2nd or N root gather line broken string, no matter whether the 1st or the collection of N+1 root break, program is all identified as broken string.In the time that the adjacent 2 collection lines in middle 1 collection line both sides all break, in the middle of this root, gather line and all unify to be identified as broken string no matter whether break.
By said method, can find out rapidly collection line and whether exist broken string and which bar to gather line broken string.
Be more than wherein specific implementation of the present invention, it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these apparent replacement forms all belong to protection scope of the present invention.
Claims (3)
1. a battery management system battery pack gathers the recognition methods of line broken string, comprise and gather line broken string identification circuit, this identification circuit comprise a voltage sample chip (1) and be connected in the total anode of this voltage sample chip and the each battery cell of battery pack (3) between the each anodal line (4) that gathers, the each negative pole being connected between the total negative terminal of this voltage sample chip and the each battery cell of battery pack gathers line (5), gather in line and each anodal collection line and be all in series with separately controllable switch (6) at each negative pole, on each collection line, be all in series with divider resistance (7), all be connected with protection electric capacity (8) at each battery cell two ends, it is characterized in that, this recognition methods comprises the steps:
1), battery management system energising, the self-inspection of voltage sample chip, if self-inspection is normally, carries out next step;
2), detect the total anode of voltage sample chip and total negative terminal voltage, judge whether the total anode of voltage sample chip and total negative terminal exist broken string, if detect that all batteries monomer voltage is all 0, be judged as the total anode of voltage sample chip or total negative terminal broken string, otherwise be judged as the total anode of voltage sample chip and total negative terminal without broken string, enter following detection, judge that each battery cell gathers line broken string identification step;
3) if the 1st battery cell or N battery cell no-voltage detected, other battery cell has any one group of voltage normal, judges the 1st or N+1 root collection line broken string; If the 1st and all no-voltages of the 2nd battery cell detected, other has any Battery pack monomer voltage normal, judges that the 2nd gathers line broken string; Whether if (N-1) and all no-voltages of N battery cell, other has any Battery pack monomer voltage normal, judges that N root gathers line broken string, detect one by one thus N root collection line and break.
2. battery management system battery pack according to claim 1 gathers the recognition methods of line broken string, it is characterized in that, above-mentioned 2) be provided with total voltage detecting step before step, if this total voltage detecting step detects all battery cell voltage additions and equals total voltage, judge that each collection line is all without broken string; Be less than total voltage if all monomer voltages are added, enter 3) step.
3. battery management system battery pack according to claim 1 gathers the recognition methods of line broken string, it is characterized in that, special circumstances: in the time that the 2nd or N root gather line broken string, no matter whether the 1st or the collection of N+1 root are broken and are all identified as broken string, in the time that the adjacent 2 collection lines in middle 1 collection line both sides all break, in the middle of this root, gather line and all unify to be identified as broken string no matter whether break.
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| CN201210178528.9A CN102723754B (en) | 2012-06-01 | 2012-06-01 | Identifying circuit and identifying method of broken line of battery pack acquisition line of battery management system |
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| CN201210178528.9A CN102723754B (en) | 2012-06-01 | 2012-06-01 | Identifying circuit and identifying method of broken line of battery pack acquisition line of battery management system |
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| CN102723754A CN102723754A (en) | 2012-10-10 |
| CN102723754B true CN102723754B (en) | 2014-10-15 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103884988B (en) * | 2012-12-21 | 2017-02-08 | 比亚迪股份有限公司 | Battery pack fault detection device and detection method |
| CN103730700B (en) * | 2013-11-08 | 2016-02-24 | 天津力神电池股份有限公司 | A kind of electrokinetic cell system is to the judgement of sampling wire harness fault and processing method |
| CN107591572A (en) * | 2016-07-06 | 2018-01-16 | 深圳市沃特玛电池有限公司 | Battery management system acquisition module automatic number system and method |
| CN106772082B (en) * | 2016-12-23 | 2020-01-10 | 惠州市蓝微新源技术有限公司 | Voltage acquisition line disconnection detection method for single battery |
| CN107870283A (en) * | 2017-11-06 | 2018-04-03 | 山东谦恒电子科技有限公司 | BMS wiring testing devices and method |
| CN110061478B (en) * | 2019-04-28 | 2022-04-15 | 南京中感微电子有限公司 | Battery pack disconnection protection method and system |
| CN111537916B (en) * | 2020-05-28 | 2022-09-30 | 上海金脉汽车电子有限公司 | Voltage sampling chip power supply ground disconnection fault diagnosis method, device and equipment |
| CN113740749A (en) * | 2021-09-06 | 2021-12-03 | 中山华野新能源有限公司 | Automatic detection method and system for battery pack connection |
| CN117214650B (en) * | 2023-11-09 | 2024-01-26 | 深圳市美鸿电子有限公司 | Intelligent detection method and system for comprehensive performance of diode |
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| DE102009027835A1 (en) * | 2009-07-20 | 2011-01-27 | SB LiMotive Company Ltd., Suwon | Hybrid battery system |
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| JP2010091520A (en) * | 2008-10-10 | 2010-04-22 | Toshiba Corp | Battery module abnormality detection circuit, and detection method therefor |
| CN201311484Y (en) * | 2008-11-27 | 2009-09-16 | 比亚迪股份有限公司 | Battery pack checking device |
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