CN109741992A - A kind of relay driving control system, method and battery management system - Google Patents
A kind of relay driving control system, method and battery management system Download PDFInfo
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- CN109741992A CN109741992A CN201910233267.8A CN201910233267A CN109741992A CN 109741992 A CN109741992 A CN 109741992A CN 201910233267 A CN201910233267 A CN 201910233267A CN 109741992 A CN109741992 A CN 109741992A
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Abstract
This application discloses a kind of relay driving control system, method and battery management systems, increase safety protecting mechanism to be embodied as relay driving control.The driving control system includes single-chip microcontroller, security control unit, flash driving circuit HSD, two low side driving circuit LSD1 and LSD2 and first and door, second and door and third and door, in which: each is connected respectively to the output end of single-chip microcontroller and security control unit with two input terminals of door；First connects the high level enable end of HSD with the output of door；Second connects the high level enable end of LSD1 with the output of door；The high level enable end of the output connection LSD2 of third and door；The output of HSD is connected to the output of LSD1 by main positive relay coil；The output of HSD is connected to the output of LSD2 by main negative relay coil；Security control unit, which detects, exports low level when exporting high level, exception when monitoring point is normal, and monitoring point includes single-chip microcontroller.
Description
Technical field
The present invention relates to power electronics fields, more specifically to a kind of relay driving control system, method
And battery management system.
Background technique
The voltage of new energy car battery packet is significantly larger than the safe voltage of human body, and relay as control battery pack with
The critical point of load progress electric energy transmission, safety of its reliably working concerning vehicle, such as when you encounter an unexpected situation, power
Relay on line should be able to disconnect in time, externally damage to avoid the high pressure of battery pack.
But the relay driving on existing BMS (Battery management system, battery management system)
Control system, it is common that relay driving is controlled alone by single-chip microcontroller, if single-chip microcontroller goes wrong or cannot timely respond to, that
Relay driving will cannot respond to or maloperation.
Summary of the invention
In view of this, the present invention provides a kind of relay driving control system, method and battery management system, to be embodied as
Relay driving control increases safety protecting mechanism.
A kind of relay driving control system, including single-chip microcontroller, security control unit, flash driving circuit, the first low side
Driving circuit, the second low side driving circuit, first and door, second and door and third and door, in which:
Two input terminals of each and door are connected respectively to the output end and the security control unit of the single-chip microcontroller
Output end；
Described first connect the high level enable end of the flash driving circuit with the output end of door；
Described second connect the high level enable end of the described first low side driving circuit with the output end of door；
The third connects the high level enable end of the described second low side driving circuit with the output end of door；
The output end of the flash driving circuit is connected to the described first low side by the coil of main positive relay and drives electricity
The output end on road；
The coil that the output end of the flash driving circuit also passes through main negative relay is connected to the described second low side driving
The output end of circuit；
The security control unit is used to export high level when detecting that monitoring point is normal, is detecting the monitoring point
Low level is exported when abnormal, the monitoring point includes the single-chip microcontroller.
Optionally, two input terminals of each and door are connected respectively to the output end of the single-chip microcontroller and the safety is controlled
The output end of unit processed, comprising: described first is connected respectively to the first output end of the single-chip microcontroller with two input terminals of door
With the first output end of the security control unit；Described second is connected respectively to the single-chip microcontroller with two input terminals of door
First output end of second output terminal and the security control unit；Two input terminals of the third and door are connected respectively to institute
State the third output end of single-chip microcontroller and the second output terminal of the security control unit；
Corresponding, the security control unit is specifically used for when detecting the monitoring point exception, first control itself the
One output end exports low level, controls itself second output terminal output low level again after being delayed preset time.
Optionally, the monitoring point further includes the monitoring point outside battery management system BMS.
Optionally, the security control unit is also used to after the power-up, progress self-test first, if there is no problem for self-test,
It is whether abnormal that the monitoring point is monitored again；If self-test is found the problem, low level is exported.
A kind of battery management system, including any relay driving control system as disclosed above.
A kind of relay driving control method, applied to the security control unit in relay driving control system；It is described
Relay driving control system include single-chip microcontroller, the security control unit, flash driving circuit, the first low side driving circuit,
Second low side driving circuit, first and door, second and door and third and door, in which:
Two input terminals of each and door are connected respectively to the output end and the security control unit of the single-chip microcontroller
Output end；
Described first connect the high level enable end of the flash driving circuit with the output end of door；Described second with door
Output end connects the high level enable end of the described first low side driving circuit；The output end of the third and door connection described second
The high level enable end of low side driving circuit；
The output end of the flash driving circuit is connected to the described first low side by the coil of main positive relay and drives electricity
The output end on road；The coil that the output end of the flash driving circuit also passes through main negative relay is connected to the described second low side and drives
The output end of dynamic circuit；
The relay driving control method includes:
Judge whether monitoring point works normally, the monitoring point includes the single-chip microcontroller；
If so, output high level；
If it is not, output low level.
Optionally, two input terminals of each and door are connected respectively to the output end of the single-chip microcontroller and the safety is controlled
The output end of unit processed, comprising: described first is connected respectively to the first output end of the single-chip microcontroller with two input terminals of door
With the first output end of the security control unit；Described second is connected respectively to the single-chip microcontroller with two input terminals of door
First output end of second output terminal and the security control unit；Two input terminals of the third and door are connected respectively to institute
State the third output end of single-chip microcontroller and the second output terminal of the security control unit；
It is corresponding, the output low level, comprising: the first output end for first controlling the security control unit exports low electricity
It is flat, control the second output terminal output low level of the security control unit again after being delayed preset time.
Optionally, the monitoring point further includes the monitoring point outside BMS.
Optionally, it is described judge whether monitoring point works normally before, further includes:
The security control unit carries out self-test first after the power-up, if there is no problem for self-test, then executes the judgement
The step of whether monitoring point works normally；If self-test is found the problem, low level is exported.
It can be seen from the above technical scheme that due to there is the intervention of security control unit, so that the control of relay driving
System power is grasped alone by single-chip microcontroller；The situation of security control unit meeting real-time monitoring single-chip microcontroller, plays one and " guards the gate
The effect of dog ", once discovery single-chip microcontroller goes wrong or cannot timely respond to, security control unit will disconnect relay immediately
Device, to increase safety protecting mechanism for relay driving control.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of relay driving control system architecture schematic diagram disclosed by the embodiments of the present invention；
Fig. 2 is another relay driving control system architecture schematic diagram disclosed by the embodiments of the present invention；
Fig. 3 is a kind of relay driving control method flow chart disclosed by the embodiments of the present invention；
Fig. 4 is another relay driving control method flow chart disclosed by the embodiments of the present invention；
Fig. 5 is another relay driving control method flow chart disclosed by the embodiments of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, the embodiment of the invention discloses a kind of relay driving control system, for for the master in BMS just after
Electric appliance K1 and main negative relay K2 provides drive control, and main positive relay K1 setting is being connected to battery pack anode and load anode
Between power line on, main negative relay K2 be arranged in be connected to battery pack cathode and the power line that loads between cathode on.
The relay control system specifically includes single-chip microcontroller 10, security control unit 20, flash driving circuit HSD,
One it is low while driving circuit LSD1, second it is low while driving circuit LSD2, first with door 31, second and door 32 and third and door 33,
In:
Two input terminals of each and door be connected respectively to single-chip microcontroller 10 output end and security control unit 20 it is defeated
Outlet, such as: first is connected respectively to the first output end P1 and security control list of single-chip microcontroller 10 with two input terminals of door 31
First output end D1 of member 20；Second is connected respectively to the second output terminal P2 and peace of single-chip microcontroller 10 with two input terminals of door 32
First output end D1 of full control unit 20；The third that two input terminals of third and door 33 are connected respectively to single-chip microcontroller 10 exports
Hold the second output terminal D2 of P3 and security control unit 20；
First connect the high level enable end of flash driving circuit HSD with the output end of door 31；
Second connect the high level enable end of the first low side driving circuit LSD1 with the output end of door 32；
Third connect the high level enable end of the second low side driving circuit LSD2 with the output end of door 33；
The output end of flash driving circuit HSD is connected to the first low side driving circuit by the coil of main positive relay K1
The output end of LSD1；
The coil that the output end of flash driving circuit HSD also passes through main negative relay K2 is connected to the second low side driving circuit
The output end of LSD2；
Security control unit 20 is used to export high level when detecting that monitoring point is normal, is detecting that the monitoring point is different
Low level is exported when often, the monitoring point includes single-chip microcontroller 10, there is communication between security control unit 20 and single-chip microcontroller 10 and connects
It connects.
In the following, the working principle to the embodiment of the present invention is described in detail.
Flash driving circuit HSD, the enable end of the first low driving circuit LSD2 when driving circuit LSD1 and second are low are equal
It is enabled for high level.When high level is set in the enable end of flash driving circuit HSD, output end is the equal of power end；First is low
When high level is set in the enable end of side driving circuit LSD1, output end is the equal of ground terminal；Second low side driving circuit LSD2
Enable end when setting high level, output end also corresponds to be ground terminal.
The coil both ends of main positive relay K1 respectively with the output end of flash driving circuit HSD and the first low side driving circuit
The output end of LSD1 is connected, only when height is set in the enable end of the low side driving circuit LSD1 of flash driving circuit HSD and first simultaneously
When level, the coil of main positive relay K1 can just obtain electric, lead positive relay K1 at this time and be attracted.
The coil both ends of main negative relay K2 respectively with the output end of flash driving circuit HSD and the second low side driving circuit
The output end of LSD2 is connected, only when height is set in the enable end of the low side driving circuit LSD2 of flash driving circuit HSD and second simultaneously
When level, the coil of main negative relay K2 can just obtain electric, lead negative relay K2 at this time and be attracted.
The enabled end signal of flash driving circuit HSD by single-chip microcontroller 10 output end signal and security control unit 20 it is defeated
It (is specifically that the enabled end signal of flash driving circuit HSD is by single-chip microcontroller 10 in Fig. 1 that end signal is formed by AND operation out
The first output end signal and the first output end signal of security control unit 20 formed by AND operation, the first low side driving
The enabled end signal of circuit LSD1 is believed by the second output terminal signal of single-chip microcontroller 10 and the first output end of security control unit 20
Number formed by AND operation, the enabled end signal of the second low side driving circuit LSD2 by single-chip microcontroller 10 third output end signal
Formed with the second output terminal signal of security control unit 20 by AND operation), only when single-chip microcontroller 10 and security control list
When member 20 exports high level simultaneously, flash driving circuit HSD, the first low driving circuit when driving circuit LSD1 and second are low
LSD2 could be enabled, and main positive relay K1 and main negative relay K2 can be just attracted.And security control unit 20 once detects list
When piece machine 10 abnormal (go wrong or cannot timely respond to), low level output can be immediately become, at this time flash driving circuit
HSD, the first low driving circuit LSD2 when driving circuit LSD1 and second are low lose enabled, main positive relay K1 and main negative relay
Device K2 is disconnected；Until security control unit 20 can just control main positive relay when detecting that the abnormal conditions of single-chip microcontroller 10 are removed
Device K1 and main negative relay K2 restore to be attracted.
It can be seen that due to there is the intervention of security control unit 20, so that the control of relay driving is no longer by list
Piece machine 10 is grasped alone, and the situation of the meeting real-time monitoring single-chip microcontroller 10 of security control unit 20 plays the role of one " house dog ",
Once it was found that single-chip microcontroller 10 goes wrong or cannot timely respond to, security control unit 20 will disconnect relay immediately, from
It and is that relay driving control increases safety protecting mechanism.
Wherein, single-chip microcontroller 10 is mainly used for determining itself output electricity according to complete machine (such as new-energy automobile) need of work
It puts down, export low level etc. when self-test is found the problem, control logic belongs to the prior art, and details are not described herein again.
Wherein it should be noted that each is between two input terminals and single-chip microcontroller 10, security control unit 20 of door
Connection relationship be also possible to other than using connection relationship shown in Fig. 1: first distinguishes with two input terminals of door 31
It is connected to the first output end of single-chip microcontroller 10 and the first output end of security control unit 20；Second with two input terminals of door 32
It is connected respectively to the second output terminal of single-chip microcontroller 10 and the second output terminal of security control unit 20；Two of third and door 33 are defeated
Enter end and is connected respectively to the third output end of single-chip microcontroller 10 and the third output end of security control unit 20.Alternatively, being also possible to:
First with two input terminals of door 31 be connected respectively to single-chip microcontroller 10 the first output end and security control unit 20 it is first defeated
Outlet；Second with two input terminals of door 32 be connected respectively to single-chip microcontroller 10 second output terminal and security control unit 20 the
One output end；Two input terminals of third and door 33 are connected respectively to the third output end and security control unit 20 of single-chip microcontroller 10
The first output end.Its connection relationship multiplicity, no longer repeats one by one herein.
Optionally, in any relay driving control system disclosed above, security control unit 20 is specifically used for
When detecting the monitoring point exception, itself the first output end output low level is first controlled, is controlled again after being delayed preset time
Itself second output terminal output low level is made, thus can first allow flash driving circuit HSD, the first low side driving circuit LSD1
Enabled, the main positive relay K1 of disconnection is lost, allows the second low side driving circuit LSD2 to lose again between being then delayed one immediately enabled, breaks
It opens and leads negative relay K2, to avoid leading positive relay K1 and leading negative relay K2 simultaneously switching off and relay contact occurring and glues
Even.
Optionally, in any relay driving control system disclosed above, it includes single-chip microcontroller that the monitoring point, which is removed,
It further include multiple monitoring point J1~Jn outside BMS, the total number of the BMS external monitoring point of n >=1, n outside 10.For example, safety
Control unit 20 detects battery pack surface temperature by temp probe, exports low level when battery pack surface temperature exception, breaks
The connection between control battery pack and load is opened, avoids that accident occurs.
Optionally, in any relay driving control system disclosed above, security control unit 20 after the power-up,
Self-test is carried out first, if there is no problem for self-test, then whether extremely to monitor the monitoring point；If self-test is found the problem, output
Low level.
The embodiment of the invention also discloses a kind of BMS, including any relay driving control system as disclosed above.
Opposite with the above system embodiment, the embodiment of the invention also discloses a kind of relay driving control methods, should
Method is applied to the security control unit in relay driving control system；The relay driving control system includes monolithic
Machine, the security control unit, flash driving circuit, first it is low while driving circuit, second it is low while driving circuit, first with door,
Second with door and third and door, in which:
Two input terminals of each and door are connected respectively to the output end and the security control unit of the single-chip microcontroller
Output end；
Described first connect the high level enable end of the flash driving circuit with the output end of door；Described second with door
Output end connects the high level enable end of the described first low side driving circuit；The output end of the third and door connection described second
The high level enable end of low side driving circuit；
The output end of the flash driving circuit is connected to the described first low side by the coil of main positive relay and drives electricity
The output end on road；The coil that the output end of the flash driving circuit also passes through main negative relay is connected to the described second low side and drives
The output end of dynamic circuit；
As shown in Fig. 2, the relay driving control method includes:
Step S01: judging whether monitoring point works normally, and the monitoring point includes the single-chip microcontroller；If so, entering step
S02；If it is not, entering step S03；
Step S02: high level is exported, later return step S01；
Step S03: low level is exported, later return step S01.
Optionally, two input terminals of each and door are connected respectively to the output end of the single-chip microcontroller and the safety is controlled
The output end of unit processed, comprising: described first is connected respectively to the first output end of the single-chip microcontroller with two input terminals of door
With the first output end of the security control unit；Described second is connected respectively to the single-chip microcontroller with two input terminals of door
First output end of second output terminal and the security control unit；Two input terminals of the third and door are connected respectively to institute
State the third output end of single-chip microcontroller and the second output terminal of the security control unit；
Corresponding, the step S03 is specifically included: controlling the first, second output end output of the security control unit
High level；
The step S03 is specifically included: first being controlled the first output end output low level of the security control unit, is being prolonged
When preset time after control again the security control unit second output terminal output low level.
Optionally, in any relay driving control method disclosed above, the monitoring point further includes outside BMS
Monitoring point.
In addition, the embodiment of the invention also discloses another based on any relay driving control system disclosed above
Kind relay driving control method, including
Step S11: the security control unit carries out self-test first after the power-up, judges whether self-test goes wrong, such as
There is no problem for fruit self-test, enters step S12；If self-test is found the problem, S14 is entered step.
Step S12: judging whether monitoring point works normally, and the monitoring point includes the single-chip microcontroller；If so, entering step
S13；If it is not, entering step S14；
Step S13: high level is exported, later return step S12；
Step S14: low level is exported, later return step S11.
In conclusion the present invention passes through intervention security control unit, so that the control of relay driving is no longer by list
Piece machine is grasped alone；The situation of security control unit meeting real-time monitoring single-chip microcontroller, plays the role of one " house dog ", once hair
Existing single-chip microcontroller goes wrong or cannot timely respond to, and security control unit will disconnect relay immediately, to be relay
Drive control increases safety protecting mechanism.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For method disclosed in embodiment
For, since it is corresponding with system disclosed in embodiment, so being described relatively simple, related place is defended oneself referring to Account Dept
It is bright.
Herein, relational terms such as first and second and the like be used merely to by an entity or operation with it is another
One entity or operation distinguish, and without necessarily requiring or implying between these entities or operation, there are any this reality
Relationship or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to the packet of nonexcludability
Contain, so that the process, method, commodity or the equipment that include a series of elements not only include those elements, but also including
Other elements that are not explicitly listed, or further include for this process, method, commodity or the intrinsic element of equipment.
In the absence of more restrictions, the element limited by sentence " including one ", it is not excluded that including process, the side of element
There is also other identical elements in method, commodity or equipment.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the program can be stored in computer-readable storage medium
In, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, the storage medium can be magnetic
Dish, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access
Memory, RAM) etc..
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments in the case where not departing from the spirit or scope of the embodiment of the present invention.Therefore,
The embodiment of the present invention is not intended to be limited to the embodiments shown herein, and be to fit to principles disclosed herein and
The consistent widest scope of features of novelty.
Claims (9)
1. a kind of relay driving control system, which is characterized in that including single-chip microcontroller, security control unit, flash driving circuit,
First it is low while driving circuit, second it is low while driving circuit, first with door, second with door and third and door, in which:
Two input terminals of each and door be connected respectively to the single-chip microcontroller output end and the security control unit it is defeated
Outlet；
Described first connect the high level enable end of the flash driving circuit with the output end of door；
Described second connect the high level enable end of the described first low side driving circuit with the output end of door；
The third connects the high level enable end of the described second low side driving circuit with the output end of door；
The output end of the flash driving circuit is connected to the described first low side driving circuit by the coil of main positive relay
Output end；
The coil that the output end of the flash driving circuit also passes through main negative relay is connected to the described second low side driving circuit
Output end；
The security control unit is used to export high level when detecting that monitoring point is normal, is detecting that the monitoring point is abnormal
When export low level, the monitoring point includes the single-chip microcontroller.
2. relay driving control system according to claim 1, which is characterized in that two input terminals of each and door
It is connected respectively to the output end of the single-chip microcontroller and the output end of the security control unit, comprising: described first and the two of door
A input terminal is connected respectively to the first output end of the single-chip microcontroller and the first output end of the security control unit；Described
Two with two input terminals of door be connected respectively to the single-chip microcontroller second output terminal and the security control unit it is first defeated
Outlet；Two input terminals of the third and door are connected respectively to the third output end and the security control list of the single-chip microcontroller
The second output terminal of member；
Corresponding, the security control unit is specifically used for when detecting the monitoring point exception, and it is first defeated first to control itself
Outlet exports low level, controls itself second output terminal output low level again after being delayed preset time.
3. relay driving control system according to claim 1, which is characterized in that the monitoring point further includes cell tube
Monitoring point outside reason system BMS.
4. relay driving control system according to claim 1, which is characterized in that the security control unit is also used to
After the power-up, self-test is carried out first, if there is no problem for self-test, then whether extremely to monitor the monitoring point；If self-test is found
Problem exports low level.
5. a kind of battery management system, which is characterized in that including relay driving control such as of any of claims 1-4
System processed.
6. a kind of relay driving control method, which is characterized in that applied to the security control in relay driving control system
Unit；The relay driving control system includes single-chip microcontroller, the security control unit, flash driving circuit, the first low side
Driving circuit, the second low side driving circuit, first and door, second and door and third and door, in which:
Two input terminals of each and door be connected respectively to the single-chip microcontroller output end and the security control unit it is defeated
Outlet；
Described first connect the high level enable end of the flash driving circuit with the output end of door；Described second with the output of door
End connects the high level enable end of the first low side driving circuit；The third connects the second low side with the output end of door
The high level enable end of driving circuit；
The output end of the flash driving circuit is connected to the described first low side driving circuit by the coil of main positive relay
Output end；The coil that the output end of the flash driving circuit also passes through main negative relay is connected to the described second low side driving electricity
The output end on road；
The relay driving control method includes:
Judge whether monitoring point works normally, the monitoring point includes the single-chip microcontroller；
If so, output high level；
If it is not, output low level.
7. relay driving control method according to claim 6, which is characterized in that two input terminals of each and door
It is connected respectively to the output end of the single-chip microcontroller and the output end of the security control unit, comprising: described first and the two of door
A input terminal is connected respectively to the first output end of the single-chip microcontroller and the first output end of the security control unit；Described
Two with two input terminals of door be connected respectively to the single-chip microcontroller second output terminal and the security control unit it is first defeated
Outlet；Two input terminals of the third and door are connected respectively to the third output end and the security control list of the single-chip microcontroller
The second output terminal of member；
It is corresponding, the output low level, comprising: the first output end output low level of the security control unit is first controlled,
Control the second output terminal output low level of the security control unit again after being delayed preset time.
8. relay driving control method according to claim 6, which is characterized in that the monitoring point further includes outside BMS
The monitoring point in portion.
9. relay driving control method according to claim 6, which is characterized in that described to judge whether monitoring point is normal
Before work, further includes:
The security control unit carries out self-test first after the power-up, if there is no problem for self-test, then executes the judgement monitoring
The step of whether point works normally；If self-test is found the problem, low level is exported.
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| CN201910233267.8A CN109741992A (en) | 2019-03-26 | 2019-03-26 | A kind of relay driving control system, method and battery management system |
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| CN201910233267.8A CN109741992A (en) | 2019-03-26 | 2019-03-26 | A kind of relay driving control system, method and battery management system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112721639A (en) * | 2019-10-28 | 2021-04-30 | 上海度普新能源科技有限公司 | Relay control method and device |
| CN114188188A (en) * | 2021-12-20 | 2022-03-15 | 联合汽车电子有限公司 | Driving circuit of relay |
| CN114783829A (en) * | 2022-05-07 | 2022-07-22 | 东软睿驰汽车技术（沈阳）有限公司 | Relay drive circuit and diagnosis method thereof |
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| CN114783829A (en) * | 2022-05-07 | 2022-07-22 | 东软睿驰汽车技术（沈阳）有限公司 | Relay drive circuit and diagnosis method thereof |
| CN114783829B (en) * | 2022-05-07 | 2024-05-28 | 东软睿驰汽车技术（沈阳）有限公司 | Relay driving circuit and diagnosis method thereof |
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