CN205800813U - A kind of multichannel battery temperature fault control circuit - Google Patents

A kind of multichannel battery temperature fault control circuit Download PDF

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Publication number
CN205800813U
CN205800813U CN201620775412.7U CN201620775412U CN205800813U CN 205800813 U CN205800813 U CN 205800813U CN 201620775412 U CN201620775412 U CN 201620775412U CN 205800813 U CN205800813 U CN 205800813U
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China
Prior art keywords
outfan
resistance
circuit
battery
temperature
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Expired - Fee Related
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CN201620775412.7U
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Chinese (zh)
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丁更新
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Anhui Jianghuai Automobile Group Corp
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries

Abstract

This utility model provides a kind of multichannel battery temperature fault control circuit, including: temperature collection circuit, multicircuit switch, A/D modular converter, temperature fault diagnostic circuit, processor and battery output control module.The outfan of each group of temperature collection circuit is connected with multicircuit switch input, and the outfan of multicircuit switch is connected with the input of A/D modular converter and the input of temperature fault diagnostic circuit respectively.The input of processor is connected with the outfan of A/D modular converter, first outfan of processor is connected with the control end of multicircuit switch, second outfan of processor is connected with the first input end of battery output control module, and the second input of battery output control module is connected with the outfan of temperature fault diagnostic circuit.This utility model solves the problem that set of cells High voltage output controlling soil moist is single when battery temperature fault, can be effectively improved safety and the practicality of battery management system.

Description

A kind of multichannel battery temperature fault control circuit
Technical field
This utility model relates to battery management technique, particularly relates to a kind of multichannel battery temperature fault control circuit.
Background technology
One of electric automobile important directions having had become as development of automobile, in electric automobile, battery management system Security performance is the most important content of vehicle performance quality performance, battery management system the adopting of all information in carry battery bag Collection and the communication function with car load communication node, which includes and detect cell voltage, temperature, electric current in real time.And it is right The temperature detection collection of battery bag cell is a critical function of battery management system, and temperature is that reflection battery behavior is good One of bad important parameter, temperature height or temperature raise speed and the most directly reflect battery performance quality.Battery temperature mistake High or too low when using, can have a strong impact on the charge-discharge performance of battery, shorten battery life, severe patient can cause battery to leak Liquid, the most on fire.In existing technical scheme, by processor, the temperature gathered is carried out fault compared with design temperature Judge, and then control the folding of battery high-voltage relay, realize the High voltage output of set of cells.But it is this only soft by processor Part controls the mode of set of cells High voltage output, if processor breaks down, when there is too high or too low fault in battery, and may Battery output can be made to control to be in the phenomenon that cannot work, cause to lose control of one's vehicle, cause security incident.
Utility model content
This utility model provides a kind of multichannel battery temperature fault control circuit, solves the battery when battery temperature fault The problem that group High voltage output controlling soil moist is single, can be effectively improved safety and the practicality of battery management system.
For realizing object above, this utility model offer techniques below scheme:
A kind of multichannel battery temperature fault control circuit, including organizing temperature collection circuit, temperature described in each group is adopted more The voltage that one test point temperature of collector output is corresponding;Also include: multicircuit switch, A/D modular converter, temperature fault Diagnostic circuit, processor and battery output control module;
The outfan of temperature collection circuit described in each group is connected with an input of described multicircuit switch, described The outfan of multicircuit switch respectively with the input of described A/D modular converter and the input of described temperature fault diagnostic circuit End is connected;
The input of described processor is connected with the outfan of described A/D modular converter, the first output of described processor End is connected with the control end of described multicircuit switch, the second outfan of described processor and described battery output control module First input end be connected, the output of the second input of described battery output control module and described temperature fault diagnostic circuit End is connected;
The end that controls of described multicircuit switch exports for the passage gating described multicircuit switch;
When corresponding too high or too low for temperature of the voltage that described temperature collection circuit exports, the second of described processor is defeated Go out to hold output low level, otherwise export high level;
When the second outfan output low level or the described temperature fault diagnostic circuit output high level of described processor, Described battery output control module disconnects the High voltage output of battery.
Preferably, described battery output control module includes: the first NMOS tube, the second NMOS tube, high-voltage relay, first Resistance and the second resistance;
The grid of described first NMOS tube is connected with one end of described first resistance, and the source electrode of described first NMOS tube connects Ground, the coil tandem of described high-voltage relay between the drain electrode of power supply and described first NMOS tube, described first resistance The other end as the first input end of described battery output control module;
The grid of described second NMOS tube is as the second input of described battery output control module, described 2nd NMOS The source ground of pipe, the drain electrode of described second NMOS tube respectively with the grid of described first NMOS tube and the one of described second resistance End is connected, another termination power supply of described second resistance;
The input of described high-voltage relay is connected with the cathode output end of set of cells, the outfan of described high-voltage relay It is connected with electrical load.
Preferably, described temperature fault diagnostic circuit includes: the first comparator, the second comparator, the first bleeder circuit, Two bleeder circuits, the first diode and the second diode;
The positive terminal of described first comparator is connected with the outfan of described multicircuit switch, described first comparator End of oppisite phase is connected with the outfan of described first bleeder circuit, the outfan of described first comparator and described first diode Anode is connected;
The end of oppisite phase of described second comparator is connected with the outfan of described multicircuit switch, described second comparator Positive terminal is connected with the outfan of described second bleeder circuit, the outfan of described second comparator and described second diode Anode is connected;
The negative electrode of described first diode is connected with the negative electrode of described second diode, and diagnoses as described temperature fault The outfan of circuit.
Preferably, described first bleeder circuit includes: the 3rd resistance and the 4th resistance;
Described 3rd resistance and described 4th resistance are serially connected between reference power supply and car load ground, described 3rd resistance and institute State the one end outfan as described first bleeder circuit of the 4th resistance connection.
Preferably, described second bleeder circuit includes: the 5th resistance and the 6th resistance;
Described 5th resistance and described 6th resistance are serially connected between reference power supply and car load ground, described 5th resistance and institute State the one end outfan as described second bleeder circuit of the 6th resistance connection.
Preferably, described multicircuit switch uses 16 path analoging switch chips.
Preferably, described high-voltage relay is normally opened relay.
This utility model provides a kind of multichannel battery temperature fault control circuit, when fault too high or too low for temperature, Make temperature fault diagnostic circuit and processor control the High voltage output of set of cells simultaneously.Solve the set of cells when battery temperature fault The problem that High voltage output controlling soil moist is single, can be effectively improved safety and the practicality of battery management system.
Accompanying drawing explanation
In order to be illustrated more clearly that the specific embodiment of the present invention, the accompanying drawing used required in embodiment will be made below Introduce simply.
Fig. 1: be a kind of multichannel battery temperature fault control circuit structural representation of this utility model offer;
Fig. 2: be the circuit diagram of the battery output control module that this utility model embodiment provides;
Fig. 3: be the temperature fault diagnostic circuit schematic diagram of this utility model embodiment offer;
Fig. 4: be the temperature collection circuit schematic diagram of this utility model embodiment offer.
Reference
1 temperature collection circuit
2 multicircuit switches
3 A/D modular converters
4 processors
5 temperature fault diagnostic circuits
6 battery output control modules
ACC power supply
A first input end
B the second input
C high-voltage output end
The cathode output end of D set of cells
Detailed description of the invention
In order to make those skilled in the art be more fully understood that scheme of the present utility model, below in conjunction with the accompanying drawings and embodiment party This utility model embodiment is described in further detail by formula.
When there is fault too high or too low for temperature for present battery group, the High voltage output controlling soil moist of set of cells is single Problem, if processor breaks down, when too high or too low fault occurs in battery, may make battery output control be in nothing The phenomenon of method work, causes to lose control of one's vehicle, causes security incident.This utility model provides a kind of multichannel battery temperature fault control Circuit processed, when fault too high or too low for temperature, makes temperature fault diagnostic circuit and processor control the high pressure of set of cells simultaneously Output.Solve the problem that set of cells High voltage output controlling soil moist is single when battery temperature fault, battery management can be effectively improved The safety of system and practicality.
As it is shown in figure 1, a kind of multichannel temperature diagnostic circuit structural representation provided for this utility model.This circuit bag Including many group temperature collection circuits 1, each group of temperature collection circuit 1 exports the corresponding voltage of test point temperature;This circuit Also include: multicircuit switch 2, A/D modular converter 3, temperature fault diagnostic circuit 5, processor 4 and battery output control module 6.The outfan of each group of temperature collection circuit 1 is connected with an input of multicircuit switch 2, multicircuit switch 2 Outfan is connected with the input of A/D modular converter 3 and the input of temperature fault diagnostic circuit 5 respectively.The input of processor 4 End is connected with the outfan of A/D modular converter 5, and the first outfan of processor 4 is connected with the control end of multicircuit switch 2, Second outfan of processor 4 is connected with the first input end of battery output control module 6, the of battery output control module 6 Two inputs are connected with the outfan of temperature fault diagnostic circuit 5.The control end of described multicircuit switch is used for gating described The passage output of multicircuit switch;When corresponding too high or too low for temperature of voltage of temperature collection circuit 1 output, processor The second outfan output low level of 4, otherwise exports high level.The second outfan output low level or temperature at processor 4 When fault diagnosis circuit 5 exports high level, battery output control module 6 disconnects the High voltage output of battery.
Specifically, control the collection voltage of each passage of multicircuit switch 2 output at processor 4, be defeated by A/D respectively Modular converter 3 and temperature fault diagnostic circuit 5.Test point fault too high or too low for temperature is judged at temperature fault diagnostic circuit 5 Time output high level, make battery output control module 6 disconnect the High voltage output of set of cells.A/D modular converter is exported by processor 4 Collection voltage with set threshold value carry out, to comparing, determining fault too high or too low for temperature output low level, it is possible to make battery Output control module 6 disconnects the High voltage output of set of cells.The two-way input signal making battery output control module 6 have can be controlled The High voltage output of battery processed.
As in figure 2 it is shown, the circuit diagram of the battery output control module provided for this utility model embodiment.Battery is defeated Go out control module 6 to include: the first NMOS tube QC1, the second NMOS tube QC2, high-voltage relay, the first resistance R1 and the second resistance R2.The grid of the first NMOS tube QC1 and one end of the first resistance R1 are connected, the source ground of the first NMOS tube QC1, described high pressure The coil tandem of relay is between the drain electrode of power supply and the first NMOS tube QC1, and the other end of the first resistance R1 is as electricity The first input end A of pond output control module 6.The grid of the second NMOS tube QC2 is second defeated as battery output control module 6 Enter to hold B, the source ground of the second NMOS tube QC2, the drain electrode of the second NMOS tube QC2 respectively with the grid of the first NMOS tube QC1 and One end of second resistance R2 is connected, another termination power supply ACC of the second resistance R2.The input of described high-voltage relay with The cathode output end D of set of cells is connected, and the outfan C of described high-voltage relay and electrical load (not shown on figure) are connected.
Specifically, battery output control module 6 uses level signal to realize controlling the break-make of high-voltage relay, continues at high pressure During electrical equipment Guan Bi, set of cells carries out high voltage supply, and when high-voltage relay disconnects, set of cells disconnects high voltage supply.By first NMOS tube QC1 and the connected mode of the second NMOS tube QC2, make processor 4 output low level or the output of temperature fault diagnostic circuit During high level, high-voltage relay is off.
As it is shown on figure 3, the temperature fault diagnostic circuit schematic diagram provided for this utility model embodiment.Temperature fault diagnoses Circuit 5 includes: the first comparator UC3A, the second comparator UC3B, the first bleeder circuit, the second bleeder circuit, the first diode DC1 and the second diode DC2.The positive terminal of the first comparator UC3A is connected with the outfan of multicircuit switch 2, and first compares The end of oppisite phase of device UC3A is connected with the outfan of described first bleeder circuit, the outfan of the first comparator UC3A and the one or two pole The anode of pipe DC1 is connected.The end of oppisite phase of the second comparator UC3B is connected with the outfan of multicircuit switch 2, the second comparator The positive terminal of UC3B is connected with the outfan of described second bleeder circuit, the outfan of the second comparator UC3B and the second diode The anode of DC2 is connected.The negative electrode of the first diode DC1 and the negative electrode of the second diode DC2 are connected, and as described temperature fault Examine the outfan of circuit.
Further, described first bleeder circuit includes: the 3rd resistance RC1 and the 4th resistance RC2.3rd resistance RC1 and Four resistance RC2 are serially connected between reference power supply and car load ground, and one end that the 3rd resistance RC1 and the 4th resistance RC2 connects is as institute State the outfan of the first bleeder circuit.
Described second bleeder circuit includes: the 5th resistance RC3 and the 6th resistance RC4.5th resistance RC3 and the 6th resistance RC4 is serially connected between reference power supply and car load ground, and one end that the 5th resistance RC3 and the 6th resistance RC4 connects is as described second The outfan of bleeder circuit.
In actual applications, multicircuit switch 2 outfan and first is than handing over device UC3A and the company of the second comparator UC3B Connect and often increase protective resistance and filter capacitor.Simultaneously in order to protect temperature fault diagnostic circuit, increase protection electricity at its outfan Resistance and filter capacitor, make the input of processor reach circuit safety requirement, increase the Anti-Jamming of circuit.Need explanation It is that multicircuit switch 2 can use 16 tunnel analog-converted chips, processor 4 exports 4 railway digital signals and control 16 tunnel conversion cores 4 channel selecting pins of sheet, the 4 railway digital signals characterized such as AD_SE0~AD_SE3 control the 4 of 16 tunnel analog-converted chips Individual pin, realizes temperature collection circuit output data strobe corresponding for TEMP_AD1~TEMP_AD16 and is defeated by A/D analog digital conversion Module.It should be noted that 16 tunnel analog-converted chips can be selected for the chip of model AD7506.
As it is shown on figure 3, a kind of temperature collection circuit schematic diagram provided for this utility model embodiment.This temperature acquisition electricity Road includes: critesistor NTC, build-out resistor R3, filter resistance R4, filter capacitor CC1 and voltage follower U1.Critesistor One end of NTC is connected with reference power supply, the other end of critesistor NTC respectively with one end and the filter resistance R4 of build-out resistor R3 One end be connected.The other end of filter resistance R4 respectively with the input of voltage follower U1 and the one of described filter capacitor CC1 End is connected, the outfan of voltage follower U1 as the outfan of described temperature collection circuit, the other end of build-out resistor R3 and The other end of filter capacitor CC1 is all connected with body earth.
In actual applications, the resistance that build-out resistor R3 can use precision to be 0.1%, use with critesistor NTC pairing, The resistance of critesistor NTC raises with temperature and reduces.Temperature collection circuit 1 also includes clamp circuit, described clamp circuit string It is connected between filter resistance R4 and voltage follower U1.Described clamp circuit uses two-diode clamp circuit, bipolar by two Pipe is serially connected between power supply and car load ground, and its two diode connects end as clamper input.It should be noted that 16 tunnel temperature The collection voltage of Acquisition Circuit output, can use TEMP_AD1~TEMP_AD16 to characterize.
Further, high-voltage relay is normally opened relay.
Visible, this utility model provides a kind of multichannel battery temperature fault control circuit, in event too high or too low for temperature During barrier, make temperature fault diagnostic circuit and processor control the High voltage output of set of cells simultaneously.Solve when battery temperature fault The problem that set of cells High voltage output controlling soil moist is single, can be effectively improved safety and the practicality of battery management system.
Of the present utility model structure, feature and action effect are described in detail above according to diagrammatically shown embodiment, with Upper described it is only preferred embodiment of the present utility model, but this utility model is not to limit practical range shown in drawing, every depend on The change made according to conception of the present utility model, or it is revised as the Equivalent embodiments of equivalent variations, still without departing from description and figure Show contained spiritual time, all should be in protection domain of the present utility model.

Claims (7)

1. a multichannel battery temperature fault control circuit, including organizing temperature collection circuit more, temperature acquisition described in each group The voltage that one test point temperature of circuit output is corresponding;It is characterized in that, also include: multicircuit switch, A/D modulus of conversion Block, temperature fault diagnostic circuit, processor and battery output control module;
The outfan of temperature collection circuit described in each group is connected with an input of described multicircuit switch, described multichannel The outfan of permutator respectively with the input of described A/D modular converter and the input phase of described temperature fault diagnostic circuit Even;
The input of described processor is connected with the outfan of described A/D modular converter, the first outfan of described processor with The control end of described multicircuit switch is connected, the of the second outfan of described processor and described battery output control module One input is connected, the outfan phase of the second input of described battery output control module and described temperature fault diagnostic circuit Even;
The end that controls of described multicircuit switch exports for the passage gating described multicircuit switch;
When corresponding too high or too low for temperature of the voltage that described temperature collection circuit exports, the second outfan of described processor Output low level, otherwise exports high level;
When the second outfan output low level or the described temperature fault diagnostic circuit output high level of described processor, described Battery output control module disconnects the High voltage output of battery.
Multichannel battery temperature fault control circuit the most according to claim 1, it is characterised in that described battery output control Molding block includes: the first NMOS tube, the second NMOS tube, high-voltage relay, the first resistance and the second resistance;
The grid of described first NMOS tube is connected with one end of described first resistance, the source ground of described first NMOS tube, institute State the coil tandem of high-voltage relay between the drain electrode of power supply and described first NMOS tube, another of described first resistance Hold the first input end as described battery output control module;
The grid of described second NMOS tube as the second input of described battery output control module, described second NMOS tube Source ground, the drain electrode of described second NMOS tube respectively with the grid of described first NMOS tube and one end phase of described second resistance Even, another termination power supply of described second resistance;
The input of described high-voltage relay is connected with the cathode output end of set of cells, the outfan of described high-voltage relay and electricity Gas load is connected.
Multichannel battery temperature fault control circuit the most according to claim 1, it is characterised in that described temperature fault is examined Deenergizing includes: the first comparator, the second comparator, the first bleeder circuit, the second bleeder circuit, the first diode and the two or two Pole is managed;
The positive terminal of described first comparator is connected with the outfan of described multicircuit switch, described first comparator anti-phase End is connected with the outfan of described first bleeder circuit, the outfan of described first comparator and the anode of described first diode It is connected;
The end of oppisite phase of described second comparator is connected with the outfan of described multicircuit switch, the positive of described second comparator End is connected with the outfan of described second bleeder circuit, the outfan of described second comparator and the anode of described second diode It is connected;
The negative electrode of described first diode is connected with the negative electrode of described second diode, and as described temperature fault diagnostic circuit Outfan.
Multichannel battery temperature fault control circuit the most according to claim 3, it is characterised in that described first dividing potential drop electricity Road includes: the 3rd resistance and the 4th resistance;
Described 3rd resistance and described 4th resistance are serially connected between reference power supply and car load ground, described 3rd resistance and described the One end that four resistance connect is as the outfan of described first bleeder circuit.
Multichannel battery temperature fault control circuit the most according to claim 3, it is characterised in that described second dividing potential drop electricity Road includes: the 5th resistance and the 6th resistance;
Described 5th resistance and described 6th resistance are serially connected between reference power supply and car load ground, described 5th resistance and described the One end that six resistance connect is as the outfan of described second bleeder circuit.
6. according to the multichannel battery temperature fault control circuit described in any one of claim 1 to 5, it is characterised in that described Multicircuit switch uses 16 path analoging switch chips.
7. according to the multichannel battery temperature fault control circuit described in any one of claim 1 to 5, it is characterised in that described High-voltage relay is normally opened relay.
CN201620775412.7U 2016-07-21 2016-07-21 A kind of multichannel battery temperature fault control circuit Expired - Fee Related CN205800813U (en)

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Application Number Priority Date Filing Date Title
CN201620775412.7U CN205800813U (en) 2016-07-21 2016-07-21 A kind of multichannel battery temperature fault control circuit

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Application Number Priority Date Filing Date Title
CN201620775412.7U CN205800813U (en) 2016-07-21 2016-07-21 A kind of multichannel battery temperature fault control circuit

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109050259A (en) * 2018-07-19 2018-12-21 上海汽车集团股份有限公司 Electric car relay safety control and method based on battery core administrative unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109050259A (en) * 2018-07-19 2018-12-21 上海汽车集团股份有限公司 Electric car relay safety control and method based on battery core administrative unit

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CP01 Change in the name or title of a patent holder

Address after: 230601 Anhui Province, Hefei City Industrial Park, the Peach Blossom Road No. 669

Patentee after: Anhui Jianghuai Automobile Group Limited by Share Ltd

Address before: 230601 Anhui Province, Hefei City Industrial Park, the Peach Blossom Road No. 669

Patentee before: Anhui Jianghuai Automotive Co., Ltd.

CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20161214

Termination date: 20190721

CF01 Termination of patent right due to non-payment of annual fee