CN109633469A - Battery battery core fault detection circuit and detection method - Google Patents
Battery battery core fault detection circuit and detection method Download PDFInfo
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- CN109633469A CN109633469A CN201910017296.0A CN201910017296A CN109633469A CN 109633469 A CN109633469 A CN 109633469A CN 201910017296 A CN201910017296 A CN 201910017296A CN 109633469 A CN109633469 A CN 109633469A
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- battery
- battery core
- fault detection
- fault
- detection circuit
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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
- H01M10/4285—Testing apparatus
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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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- Manufacturing & Machinery (AREA)
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- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
The present invention provides a kind of battery battery core fault detection circuit and detection methods.Battery battery core fault detection circuit of the invention, adds in the battery pack being connected to form by multiple battery cores, including controller；Acquisition chip is corresponded to each battery core setting, is detected, and when the battery core breaks down with the failure to each battery core, export fault-signal；Transmission unit is handled, corresponding to the multiple of each acquisition chip setting；After each processing transmission unit is used to receive the fault-signal and processing that corresponding acquisition chip issues, it is sent to the controller.Using technical solution of the present invention, when any battery core breaks down, Fault signal is generated by the corresponding acquisition chip of the battery core to break down, and be transmitted directly to controller after processing, effectively shorten signaling path, reduce crash rate.
Description
Technical field
The present invention relates to power battery circuit detection technique field more particularly to a kind of battery battery core fault detection circuits.
Background technique
Demand with market to electric car is being continuously increased, for the safe by higher and higher pass of electric car
Note.Either pure electric automobile or plug-in hybrid-power automobile, electrokinetic cell system are the electric energy of electronic new-energy automobile
Storage device, total voltage is generally relatively high, and comparatively battery pack is the relatively high environment of a sealing grade.Power
Battery system itself is the complication system for integrating chemistry, electrical and mechanical property, must take into account each side in system design
The safety and life time decay that the chemical characteristic of the satisfaction of face characteristic, especially battery core is included, can not intuitively test and assess, also be not easy
Short time prediction.It is used in addition, power battery is mounted on automobile, also needs to consider application environment complicated and changeable, meet simultaneously
The functional safety grade of vehicle, so just having to be measured in real time the long-term safety of battery system.
For electric vehicle, electrokinetic cell system be have many battery cores it is series-parallel made of total member.Therefore cell tube
Reason system is needed to the state parameter acquisition of battery core, function monitor, and whether main purpose is broken down in early detection battery,
It is completed in a short time the protection of battery system when necessary.Its purpose is not only prediction battery failure, while being also reasonable, safety
Using battery, extends battery life, ensures system security controls.Battery status detection is referred generally to physics such as voltage, temperature
Amount, if battery core acquisition chip detects that the Fault Function detection of battery core abnormality occurs to the physical quantitys such as above-mentioned, chip is just
Fault-signal can be sent, meeting basis handles failure after mainboard receives Fault signal, and responds.
The method of existing Fault detection circuit is more, but the design method of major part Fault detection circuit is all at present
Using cascaded structure.Its cascaded structure is:, should when any CMC (battery management system collection plate) detects that Fault occurs in battery core
Fault signal is passed to next stage CMC by CMC, is then transmitted step by step, and Fault signal is finally transmitted to BCU (cell tube
Manage system control panel), it is assigned by BCU and is instructed in next step.It can be seen that its signaling path is long, signal transmission efficiency is lower,
And transmitting node it is more, be easy to appear because node failure cause detect signal can not transport phenomenon generation.
Summary of the invention
In view of this, the present invention is directed to propose a kind of battery battery core fault detection circuit, to improve signal transmission efficiency, really
Protect the timeliness of detection feedback.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of battery battery core fault detection circuit, adds in the battery pack being connected to form by multiple battery cores, the circuit packet
It includes:
Controller；
Acquisition chip is corresponded to each battery core setting, is detected with the failure to each battery core, and in the electricity
When core breaks down, fault-signal is exported；
Transmission unit is handled, corresponding to the multiple of each acquisition chip setting；Each processing transmission unit is for connecing
After receiving the fault-signal that corresponding acquisition chip issues and processing, it is sent to the controller.
Further, the processing transmission unit includes isolation circuit.
Further, the processing transmission unit includes being connected to the acquisition chip signal output end and isolation electricity
The filter circuit of road signal input part.
Further, the filter circuit is RC filter circuit.
Further, the resistance value in the filter circuit is 330 Ω.
Further, the capacitor in the filter circuit is 47nF.
Further, the isolation circuit uses photoelectrical coupler.
Further, the model TLX0185A of the photoelectrical coupler.
Further, the controller is vehicle BCU.
In addition, this method comprises the following steps invention also provides a kind of battery battery core fault detection method:
Real-time fault detection is carried out to corresponding battery core by multiple acquisition chips, when any battery core breaks down
When, the corresponding acquisition chip of the battery core sends fault-signal to processing transmission unit；
After fault-signal being handled by processing transmission unit, be sent to controller.
Compared with the existing technology, present invention has the advantage that
Using technical solution of the present invention, when any battery core breaks down, by this, the battery core to break down is corresponding adopts
Collect chip and generate Fault signal, and be transmitted directly to controller after processing, effectively shorten signaling path, reduces
Crash rate.
Detailed description of the invention
The attached drawing for constituting a part of the invention is to be used to provide further understanding of the present invention, signal of the invention
Property embodiment and its explanation be to be used to explain the present invention, the front and back that is directed to, upper inferior noun of locality language are only used for indicating phase
Pair positional relationship, do not constitute an undue limitation on the present invention.In the accompanying drawings:
Fig. 1 is integrated circuit of embodiment of the present invention connection figure；
Fig. 2 is processing transmission unit circuit diagram.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination；Described embodiment is also only part, and not all embodiment.Based on the embodiments of the present invention, this field
Those of ordinary skill's every other embodiment obtained without making creative work, belongs to protection of the present invention
Range.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
Embodiment
The present embodiment is related to a kind of battery battery core fault detection circuit, adds in the battery pack being connected to form by multiple battery cores
On, which mainly includes controller, and acquisition chip handles transmission unit.Wherein, acquisition chip corresponds to each battery core and sets
It sets, is detected with the failure to each battery core, and when the battery core breaks down, export fault-signal；Processing is sent
Unit, corresponding to the multiple of each acquisition chip setting；Each processing transmission unit is corresponding described for receiving
Acquisition chip issue fault-signal and processing after, be sent to the controller.
As shown in Figure 1, the controller of the present embodiment uses vehicle BCU, is internally provided with MCU chip.Acquisition chip application
Acquisition chip in each battery core management system collection plate CMC, is acquired with the Fault signal to corresponding battery core.
In the present embodiment, be provided with n battery core, the corresponding collection plate of each battery core is respectively CMC#1, CMC#2, up to CMC#n-1,
CMC#n, the acquisition chip in each collection plate battery core are sent to after being acquired to the Fault signal of corresponding battery core
It handles transmission unit and vehicle BCU is sent to by main line after processing transmission unit handles Fault signal.
The processing transmission unit of the present embodiment mainly includes isolation circuit, is connected to acquisition chip signal output end and isolation
The filter circuit of circuit signal input, particular circuit configurations are as shown in Figure 2.
As shown in Figure 2 it is found that when Fault signal occur, the CMC_FAULT_OUT signal issued by acquisition chip leads to
It is connected to photoelectrical coupler U1 after crossing series resistance R1, is connected to ground through output inside photoelectrical coupler U1, at this time photoelectric coupling
Light emitting diode inside device U1 just can be lit, and just open triode thereafter, and C1 capacitance connection collectively constitutes filter after R1
Wave circuit, to play filter action；Another part is circuit on the right of isolating device photoelectrical coupler: VPOWER power supply is connected to light
After electric coupler, BCU is sent directly to through output high level inside photoelectrical coupler.It is worth noting that since CMC directly connects
Be connected to mould group, for 12V SCM system, mould group voltage is high-pressure system, need to carry out low-pressure end and high-voltage end every
From processing, it is therefore desirable to select photoelectric coupler isolation device.
Under normal operating condition, acquisition chip will not issue Fault signal inside each CMC, i.e. the end CMC_FAULT_OUT is
Low level, photo-coupler U1 interior light emitting diodes do not work, i.e., 1 foot of photoelectrical coupler U1 and 2 feet do not turn on, will not be by light
Collector (i.e. 4 feet of photoelectrical coupler U1 in Fig. 2) and emitter (the i.e. photoelectrical coupler U1 in Fig. 2 of electric coupler U1
3 feet) conducting, therefore the end BCU_FAULT_IN is low level, BCU will not receive fault-signal.
When any collection plate CMC detects battery core abnormal state, acquisition chip issues Fault signal, i.e. CMC_ inside CMC
The end FAULT_OUT is high level, and photoelectrical coupler U1 interior light emitting diodes are connected, since photoelectric coupler isolation device has
There is the characteristic of photoelectric coupling, therefore the collector and emitter of photoelectrical coupler U1 can be connected, VPOWER power supply can be by collection
Electrode flows through the Fault in pin foot that high level after emitter enters BCU, at this time the Fault in pin foot level shape of BCU
State becomes high level from low level, and after BCU detects high level, that is, being judged as has Fault, and then makes corresponding place
Reason.
In addition, being based on entire circuit, after BCU is powered on, entire circuit carries out self-test step.Specifically, MCU chip
Fault in and enabled pin are always low level state, when the enabled pin level of MCU chip becomes high level from low level
Afterwards, triode Q1 is opened, and at this moment, the Fault in pin level state of MCU is changing to high level, and self-test is completed, can be demonstrate,proved
Bright entire detection circuit is without exception.
It is the key that realize fault detection capability in addition, correctly choosing resistance R1, capacitor C1 and photoelectrical coupler U1.By
In traditional mould group voltage in 60V or so, therefore the VCE both end voltage of photoelectrical coupler U1 need to select the 1.2- in mould group voltage
1.5 times are best, more products by contrast, and the both ends the VCE pressure resistance of the TLX9185A of Toshiba is 80V, and effect is preferable.According to really
After fixed photoelectrical coupler, current-limiting resistance is matched according to the input current range (10-15mA) that it is recommended, due to CMC_FAULT_
OUT is usually 5V voltage signal, it is contemplated that the pressure drop 0.7V of VF inside photoelectrical coupler, according to formula R1=(VOUT-VF)/I
It can obtain, it is best that selection resistance R1, which is 330 Ω,.Due to the signal most required precision be not it is especially high, 5% precision can be full
Sufficient demand is in cost consideration, that is, selects the resistance of 5% precision.Electric current due to flowing through resistance in the course of work does not exceed
15mA can be obtained by formula P=I2*R, and maximum power P is 0.07W, therefore select 0603 encapsulation, the resistance of 0.1W specification
Meet demand.
Capacitor C1 is chosen for 47nF for filter design, further increases signal stabilization.Since traditional mould group voltage exists
60V or so, therefore select pressure resistance for 100V, the capacitor for being encapsulated as 0603 specification can be met the requirements.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than limitation ot it；It is all in spirit of the invention
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of battery battery core fault detection circuit, adds in the battery pack being connected to form by multiple battery cores, it is characterised in that
The circuit includes:
Controller；
Acquisition chip is corresponded to each battery core setting, is detected with the failure to each battery core, and send out in the battery core
When raw failure, fault-signal is exported；
Transmission unit is handled, corresponding to the multiple of each acquisition chip setting；Each processing transmission unit is each for receiving
After fault-signal that the self-corresponding acquisition chip issues and processing, it is sent to the controller.
2. battery battery core fault detection circuit according to claim 1, it is characterised in that: the processing transmission unit includes
Isolation circuit.
3. battery battery core fault detection circuit according to claim 2, it is characterised in that: the processing transmission unit includes
It is connected to the filter circuit of the acquisition chip signal output end and the isolation circuit signal input part.
4. battery battery core fault detection circuit according to claim 3, it is characterised in that: the filter circuit is RC filtering
Circuit.
5. battery battery core fault detection circuit according to claim 4, it is characterised in that: the resistance in the filter circuit
Value is 330 Ω.
6. battery battery core fault detection circuit according to claim 4, it is characterised in that: the capacitor in the filter circuit
For 47nF.
7. battery battery core fault detection circuit according to claim 3, it is characterised in that: the isolation circuit uses photoelectricity
Coupler.
8. according to battery battery core fault detection circuit according to claim 7, it is characterised in that: the photoelectrical coupler
Model TLX0185A.
9. according to battery battery core fault detection circuit according to any one of claim 1 to 8, it is characterised in that: described
Controller is vehicle BCU.
10. a kind of battery battery core fault detection method, it is characterised in that this method comprises the following steps:
Real-time fault detection is carried out to corresponding battery core by multiple acquisition chips, when any battery core breaks down,
The corresponding acquisition chip of the battery core sends fault-signal to processing transmission unit；
After fault-signal being handled by processing transmission unit, be sent to controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910017296.0A CN109633469A (en) | 2019-01-08 | 2019-01-08 | Battery battery core fault detection circuit and detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910017296.0A CN109633469A (en) | 2019-01-08 | 2019-01-08 | Battery battery core fault detection circuit and detection method |
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| Publication Number | Publication Date |
|---|---|
| CN109633469A true CN109633469A (en) | 2019-04-16 |
Family
ID=66060438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910017296.0A Pending CN109633469A (en) | 2019-01-08 | 2019-01-08 | Battery battery core fault detection circuit and detection method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110224186A (en) * | 2019-06-05 | 2019-09-10 | 四川咖范网络科技有限公司 | Lithium battery security monitoring management system |
| CN112234276A (en) * | 2020-03-27 | 2021-01-15 | 蜂巢能源科技有限公司 | Battery cell thermal runaway simulation circuit and method |
| WO2023028850A1 (en) * | 2021-08-31 | 2023-03-09 | 华为技术有限公司 | Power battery thermal runaway control method and apparatus, and power battery |
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| CN207301286U (en) * | 2017-01-04 | 2018-05-01 | 深圳市丰农源科技有限公司 | Battery pack multi-disc battery battery core pressure test device based on unmanned plane |
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Patent Citations (4)
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| CN205484533U (en) * | 2016-01-28 | 2016-08-17 | 安徽江淮汽车股份有限公司 | Battery voltage monitored control system |
| CN207301286U (en) * | 2017-01-04 | 2018-05-01 | 深圳市丰农源科技有限公司 | Battery pack multi-disc battery battery core pressure test device based on unmanned plane |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110224186A (en) * | 2019-06-05 | 2019-09-10 | 四川咖范网络科技有限公司 | Lithium battery security monitoring management system |
| CN112234276A (en) * | 2020-03-27 | 2021-01-15 | 蜂巢能源科技有限公司 | Battery cell thermal runaway simulation circuit and method |
| CN112234276B (en) * | 2020-03-27 | 2022-01-28 | 蜂巢能源科技有限公司 | Battery cell thermal runaway simulation circuit and method |
| WO2023028850A1 (en) * | 2021-08-31 | 2023-03-09 | 华为技术有限公司 | Power battery thermal runaway control method and apparatus, and power battery |
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Application publication date: 20190416 |