CN208736927U - A kind of under-voltage observation circuit and electric car - Google Patents
A kind of under-voltage observation circuit and electric car Download PDFInfo
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- CN208736927U CN208736927U CN201821283272.7U CN201821283272U CN208736927U CN 208736927 U CN208736927 U CN 208736927U CN 201821283272 U CN201821283272 U CN 201821283272U CN 208736927 U CN208736927 U CN 208736927U
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
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- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
This application provides a kind of under-voltage observation circuit and electric cars, wherein includes: battery pack, assembled battery total voltage bleeder circuit, reference voltage circuit, comparator and monomer voltage acquisition module；In battery pack, single battery is connect with monomer voltage acquisition port in monomer voltage acquisition module, the input terminal of assembled battery total voltage bleeder circuit is connect with battery pack, the output end of assembled battery total voltage bleeder circuit and the input terminal of comparator connect, the port VAA of monomer voltage acquisition module and the input terminal of reference voltage circuit connect, the output end of reference voltage circuit and the input terminal of comparator connect, and comparator is connect with the GPIO port of monomer voltage acquisition module.Using the circuit of the application, by the voltage of each single battery in monitoring assembled battery total voltage and battery pack, the case where can finding the overdischarge of battery pack in time, the reliability of battery pack monitoring is improved.
Description
Technical field
This application involves electric vehicle engineering fields, more particularly, to a kind of under-voltage observation circuit and electric car.
Background technique
New-energy automobile has become the prior development direction of current automotive field, and therefore, 48V power supply system is as new
One of the important component of energy automobile development, the demand to whole system reliability is also increasingly increasing, and especially 48V is supplied
When overvoltage/undervoltage failure occurs for the battery pack of electric system, battery pack is likely to occur the problem of the gas leakage of such as battery core, thus right
Occupant damages in cabin, in the prior art, generally to being only monitored to the monomer battery voltage in battery pack, it is difficult to find
Battery pack whether there is the case where overdischarge, when the overdischarge of battery pack occurs, it will destroy battery pack stability, pole has
It may cause danger, the reliability of battery pack monitoring is difficult to ensure.
Utility model content
In view of this, the application's is designed to provide a kind of under-voltage observation circuit and electric car, pass through monitoring electricity
The voltage of each single battery in pond group total voltage and battery pack, mentions the case where can finding the overdischarge of battery pack in time
The reliability of high battery pack monitoring.
In a first aspect, the embodiment of the present application provides a kind of under-voltage observation circuit, wherein include:
Battery pack, assembled battery total voltage bleeder circuit, reference voltage circuit, comparator and monomer voltage acquisition module；
In battery pack, single battery is connect with monomer voltage acquisition port in monomer voltage acquisition module, and battery pack is always electric
The input terminal of pressure bleeder circuit is connect with battery pack, and the output end of assembled battery total voltage bleeder circuit and the input terminal of comparator connect
Connect, the input terminal of the port VAA of monomer voltage acquisition module and reference voltage circuit connects, the output end of reference voltage circuit with
The input terminal of comparator connects, and comparator is connect with the general input/output port (GPIO port) of monomer voltage acquisition module.
With reference to first aspect, the embodiment of the present application provides the first possible embodiment of first aspect, wherein base
Quasi- potential circuit equipped with divider resistance R3 and divider resistance R4, divider resistance R3 and divider resistance R4 connect, divider resistance R3 with
The reverse input end of node and comparator between divider resistance R4 connects.
With reference to first aspect, the embodiment of the present application provides second of possible embodiment of first aspect, wherein electricity
Pond group total voltage bleeder circuit is in parallel with battery pack, and assembled battery total voltage bleeder circuit is equipped with divider resistance R1 and divider resistance
R2, divider resistance R1 and divider resistance R2 series connection, the forward direction of node and comparator between divider resistance R1 and divider resistance R2
Input terminal connection.
With reference to first aspect, the embodiment of the present application provides the third possible embodiment of first aspect, wherein ratio
Output compared with device terminates a pull-up resistor R5.
With reference to first aspect, the embodiment of the present application provides the 4th kind of possible embodiment of first aspect, wherein electricity
The anode of the single battery of Chi Zuzhong is connect with the monomer voltage acquisition port in monomer voltage acquisition module.
The possible embodiment of with reference to first aspect the first, the embodiment of the present application provide the 5th kind of first aspect
Possible embodiment, wherein the negative terminal of battery pack is connect with the digital grounding end in monomer voltage acquisition module.
With reference to first aspect, the embodiment of the present application provides the 6th kind of possible embodiment of first aspect, wherein electricity
Pond group (1) is 48V battery pack.
With reference to first aspect, the embodiment of the present application provides the 7th kind of possible embodiment of first aspect, wherein ratio
Compared with the model MCP6542 of device (4).
With reference to first aspect, the embodiment of the present application provides the 8th kind of possible embodiment of first aspect, wherein single
The chip model of bulk voltage acquisition module 5 includes: MAX17823, LTC6811 or NXP33771.
Second aspect, the embodiment of the present application also provide a kind of using a kind of above-mentioned electric car of under-voltage observation circuit.
A kind of under-voltage observation circuit provided by the embodiments of the present application is provided with assembled battery total voltage bleeder circuit, monomer electricity
Press acquisition module, reference voltage circuit and comparator, can monitor simultaneously the voltage status of each battery in battery pack with
And whether the total voltage of battery pack occurs brownout condition, and then timely the case where finding the overdischarge of battery pack, improves battery pack
The reliability of monitoring.
To enable the above objects, features, and advantages of the application to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
Technical solution in ord to more clearly illustrate embodiments of the present application, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only some embodiments of the application, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 shows a kind of schematic diagram of under-voltage observation circuit provided by the embodiments of the present application.
Specific embodiment
To keep the purposes, technical schemes and advantages of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application
Middle attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is only
It is some embodiments of the present application, instead of all the embodiments.The application being usually described and illustrated herein in the accompanying drawings is real
The component for applying example can be arranged and be designed with a variety of different configurations.Therefore, below to the application's provided in the accompanying drawings
The detailed description of embodiment is not intended to limit claimed scope of the present application, but is merely representative of the selected reality of the application
Apply example.Based on embodiments herein, those skilled in the art institute obtained without making creative work
There are other embodiments, shall fall in the protection scope of this application.
For convenient for understanding the present embodiment, below to a kind of under-voltage observation circuit disclosed in the embodiment of the present application into
Row is discussed in detail.
Fig. 1 shows a kind of schematic diagram of under-voltage observation circuit provided by the embodiments of the present application, as shown in Figure 1, under-voltage prison
Slowdown monitoring circuit includes:
Battery pack 1, assembled battery total voltage bleeder circuit 2,3 comparator 4 of reference voltage circuit and monomer voltage acquire mould
Block 5；
In battery pack 1, single battery is connect with monomer voltage acquisition port in monomer voltage acquisition module 5, and battery pack is total
The input terminal of voltage branch circuit 2 is connect with battery pack 1, and the output end of assembled battery total voltage bleeder circuit 2 is defeated with comparator 4
Enter end connection, the port VAA of monomer voltage acquisition module 5 is connect with the input terminal of reference voltage circuit 3, reference voltage circuit 3
Output end connect with the input terminal of comparator 4, the general input/output port of comparator 4 and monomer voltage acquisition module 5
(GPIO port) connection.
Specifically, including 12 single batteries in battery pack 1, single battery is in turn connected to monomer voltage acquisition module
4 acquisition interface C1 to C12, C0 are digital grounding ends, and monomer voltage acquisition module 4 can be supervised by acquisition interface C1 to C12
Survey the voltage of each single battery.Battery pack 1 connects assembled battery total voltage bleeder circuit 2, for obtaining 1 total voltage of battery pack
Voltage to be measured.Monomer voltage acquisition module 4 is equipped with VAA output port of power source, which connects the input of reference voltage circuit 3
End, and reference voltage is provided.The output end of assembled battery total voltage bleeder circuit 2 is connect with the input terminal of comparator 4, and is sent into electricity
The voltage to be measured of 1 total voltage of pond group.Comparator 4 obtains comparison result by comparing voltage to be measured and reference voltage.It will compare
As a result it is sent into the GPIO port in monomer voltage acquisition module, to be monitored, and judges whether battery pack occurs under-voltage shape
Condition.
Using circuit provided by the embodiments of the present application, by assembled battery total voltage bleeder circuit, monomer voltage acquisition module,
Reference voltage circuit and comparator can monitor the total of the voltage status and battery pack of each battery in battery pack simultaneously
Whether voltage occurs brownout condition, and then timely the case where finding the overdischarge of battery pack, improves the reliability of battery pack monitoring.
Reference voltage circuit 3 is connected equipped with divider resistance R3 and divider resistance R4, divider resistance R3 and divider resistance R4, point
Node between piezoresistance R3 and divider resistance R4 is connect with the reverse input end of comparator 4.
Assembled battery total voltage bleeder circuit 2 is in parallel with battery pack 1, and assembled battery total voltage bleeder circuit 2 is equipped with divider resistance
R1 and divider resistance R2, divider resistance R1 and divider resistance R2 series connection, node between divider resistance R1 and divider resistance R2 with
The positive input of comparator 4 connects.
The output of comparator 4 terminates a pull-up resistor R5.
The anode of single battery in battery pack 1 is connect with the monomer voltage acquisition port in monomer voltage acquisition module 5.
The negative terminal of battery pack 1 is connect with the digital grounding end C0 in monomer voltage acquisition module 5
Specifically, divide by divider resistance R1 and divider resistance R2 in assembled battery total voltage bleeder circuit 2
To the branch pressure voltage V0 of 1 total voltage of battery pack, V0 is sent into the positive input of under-voltage comparator 4.Pass through in reference circuit
Divider resistance R3 and divider resistance R4 obtains the reference voltage V1 of reference voltage, and reference voltage V1 is sent into the reversed of comparator 4
Input terminal.In comparator 4, when V0 is less than V1, under-voltage comparator 4 exports low level.The comparison result that comparator 4 exports is sent
Enter in the port GPIO1 of monomer voltage acquisition module 5, carry out under-voltage monitoring, when the comparison result that comparator 4 exports is low level
When, it is believed that brownout condition occurs for battery pack.Pull-up resistor R5 is used to the normality output of under-voltage comparator 4 pulling to high level, from
And it stabilizes the output voltage.
Optionally, battery pack 1 is 48V battery pack.
Optionally, the model MCP6542 of comparator 4
Optionally, the chip model of monomer voltage acquisition module 5 includes: MAX17823, LTC6811 or NXP33771.
Optionally, the embodiment of the present application also provides a kind of using a kind of above-mentioned electric car of under-voltage observation circuit.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present application, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, or be somebody's turn to do
Application product using when the orientation or positional relationship usually put, be merely for convenience of description the application and simplify description, without
It is that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, therefore not
It can be interpreted as the limitation to the application.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, and cannot manage
Solution is indication or suggestion relative importance.
In the description of the present application, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirect by intermediary
It is connected, can be the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in this application.
Finally, it should be noted that embodiment described above, the only specific embodiment of the application, to illustrate the application
Technical solution, rather than its limitations, the protection scope of the application is not limited thereto, although with reference to the foregoing embodiments to this Shen
It please be described in detail, those skilled in the art should understand that: anyone skilled in the art
Within the technical scope of the present application, it can still modify to technical solution documented by previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of the embodiment of the present application technical solution.The protection in the application should all be covered
Within the scope of.Therefore, the protection scope of the application shall be subject to the protection scope of the claim.
Claims (10)
1. a kind of under-voltage observation circuit characterized by comprising
Battery pack (1), assembled battery total voltage bleeder circuit (2), reference voltage circuit (3), comparator (4) and monomer voltage are adopted
Collect module (5)；
In the battery pack (1), single battery is connect with monomer voltage acquisition port in the monomer voltage acquisition module (5),
The input terminal of the assembled battery total voltage bleeder circuit (2) is connect with the battery pack (1), the assembled battery total voltage partial pressure electricity
The output end on road (2) is connect with the input terminal of the comparator (4), the port VAA of the monomer voltage acquisition module (5) and institute
The input terminal connection of reference voltage circuit (3) is stated, the output end of the reference voltage circuit (3) is defeated with the comparator (4)
Enter end connection, the general input/output port of the output end of the comparator (4) and the monomer voltage acquisition module (5)
(GPIO port) connection.
2. a kind of under-voltage observation circuit according to claim 1, which is characterized in that the reference voltage circuit (3) is equipped with
Divider resistance R3 and divider resistance R4, the divider resistance R3 and the divider resistance R4 series connection, the divider resistance R3 and institute
The node stated between divider resistance R4 is connect with the reverse input end of the comparator (4).
3. a kind of under-voltage observation circuit according to claim 1, which is characterized in that the assembled battery total voltage bleeder circuit
(2) in parallel with the battery pack (1), the assembled battery total voltage bleeder circuit (2) is equipped with divider resistance R1 and divider resistance R2,
The divider resistance R1 and divider resistance R2 series connection, node between the divider resistance R1 and the divider resistance R2 with
The positive input of the comparator (4) connects.
4. a kind of under-voltage observation circuit according to claim 1, which is characterized in that the output of the comparator (4) terminates
One pull-up resistor R5.
5. a kind of under-voltage observation circuit according to claim 1, which is characterized in that the monomer electricity in the battery pack (1)
The anode in pond is connect with the monomer voltage acquisition port in the monomer voltage acquisition module (5).
6. a kind of under-voltage observation circuit according to claim 1, which is characterized in that the negative terminal of the battery pack (1) and institute
State digital grounding end (C0) connection in monomer voltage acquisition module (5).
7. a kind of under-voltage observation circuit according to claim 1, which is characterized in that the battery pack (1) is 48V battery
Group.
8. a kind of under-voltage observation circuit according to claim 1, which is characterized in that the model of the comparator (4)
MCP6542。
9. a kind of under-voltage observation circuit according to claim 1, which is characterized in that the monomer voltage acquisition module (5)
Chip model include: MAX17823, LTC6811 or NXP33771.
10. a kind of electric car, which is characterized in that including the described in any item under-voltage observation circuits of the claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821283272.7U CN208736927U (en) | 2018-08-09 | 2018-08-09 | A kind of under-voltage observation circuit and electric car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821283272.7U CN208736927U (en) | 2018-08-09 | 2018-08-09 | A kind of under-voltage observation circuit and electric car |
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| Publication Number | Publication Date |
|---|---|
| CN208736927U true CN208736927U (en) | 2019-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821283272.7U Active CN208736927U (en) | 2018-08-09 | 2018-08-09 | A kind of under-voltage observation circuit and electric car |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112540218A (en) * | 2020-12-07 | 2021-03-23 | 上海卫星工程研究所 | Satellite final assembly integrated test factory building dress star lithium cell group under-voltage alarm device |
-
2018
- 2018-08-09 CN CN201821283272.7U patent/CN208736927U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112540218A (en) * | 2020-12-07 | 2021-03-23 | 上海卫星工程研究所 | Satellite final assembly integrated test factory building dress star lithium cell group under-voltage alarm device |
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