CN208522052U - A kind of low side driving circuit and battery pack with diagnostic function - Google Patents
A kind of low side driving circuit and battery pack with diagnostic function Download PDFInfo
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- CN208522052U CN208522052U CN201821301699.5U CN201821301699U CN208522052U CN 208522052 U CN208522052 U CN 208522052U CN 201821301699 U CN201821301699 U CN 201821301699U CN 208522052 U CN208522052 U CN 208522052U
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- low side
- side driving
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- voltage
- driving circuit
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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
Abstract
The utility model relates to field of electronics, propose a kind of low side driving circuit and battery pack with diagnostic function, and the circuit includes: single-chip microcontroller, low side driving chip, high-voltage relay, driving power, bleeder circuit and feed circuit.The single-chip microcontroller connects low side driving chip, and the low side driving chip connects high-voltage relay, and the other end of the high-voltage relay connects driving power.One end of the bleeder circuit is connected between high-voltage relay and low side driving chip.Described feed circuit one end connects bleeder circuit, and the other end of the feed circuit connects single-chip microcontroller.The utility model can whether normally closed and short trouble detect to high-voltage relay, therefore improve the safety of low side driving circuit, so that low side driving circuit is more reliable.
Description
Technical field
The utility model relates to field of electronics more particularly to a kind of low side driving circuits and electricity with diagnostic function
Chi Bao.
Background technique
New-energy automobile, which refers to, uses unconventional vehicle fuel as a source of power, the dynamic Control and drive of comprehensive vehicle
The advanced technology of dynamic aspect, the advanced automobile with new technology, new construction of the technical principle of formation.Electricity in new-energy automobile
The advantages of electrical automobile is with its energy conservation and cleaning, becomes current auto industry and focuses on the direction studied.
In electric car, power device battery pack is important one of building block.Battery pack is new-energy automobile
Core energy source provides driving electric energy for vehicle.Battery pack is other than it will provide power to electric car, it is also desirable to execute high pressure
The work of power distribution.It when battery pack carries out high voltage power supply assignment, is specifically carried out by high-voltage relay.
High-voltage relay is connect with low side driving circuit, and low side driving circuit is for debugging power, to drive load
's.Low side driving circuit is connect with the side that high-voltage relay is grounded.Low side driving circuit is then by electrical appliance or drive
After dynamic device, a kind of enabled circuit of driving device is realized by closure ground wire.
In the prior art, low side driving circuit does not have diagnostic function, and when high-voltage relay progress closing or opening, it can
It can occur before executing high-voltage relay close command, high-voltage relay is surprisingly closed, or short trouble occurs etc., and due to
Low side driving circuit does not have diagnostic function, can not diagnose the generation of such failure, leads to the presence of safety on low side driving circuit
Hidden danger has an impact to the safety of battery pack and vehicle.
Utility model content
The problem of the technical problems to be solved in the utility model is relay drive circuit fault detection.It is above-mentioned in order to solve
Problem, the low side driving circuit and battery pack, the utility model that the utility model proposes a kind of with diagnostic function are specifically
It is realized with following technical solution:
The first aspect of the utility model proposes a kind of low side driving circuit with diagnostic function, the circuit packet
It includes: single-chip microcontroller, low side driving chip, high-voltage relay, driving power, bleeder circuit and feed circuit；
The single-chip microcontroller connects low side driving chip, and the low side driving chip connects high-voltage relay, the high pressure after
The other end of electric appliance connects driving power；
One end of the bleeder circuit is connected between high-voltage relay and low side driving chip；
Described feed circuit one end connects bleeder circuit, and the other end of the feed circuit connects single-chip microcontroller.
The single-chip microcontroller is control module, when the single-chip microcontroller is by realizing entire low to the low control in driving chip
Control, the high-voltage relay play the role of the connection conducting of high tension loop.
Further, the bleeder circuit includes first resistor, second resistance and reference power source, the first resistor and
Two resistor coupled in parallel.
Further, one end of the first resistor is connect with feed circuit, high-voltage relay and low side driving chip, separately
One end connects reference power source；
One end of the second resistance is connect with feed circuit, high-voltage relay and low side driving chip, other end ground connection.
Further, the feed circuit includes voltage follower.The voltage follower is made of operational amplifier, institute
Stating voltage follower can be improved the transmittability of entire feedback signal.
Further, the voltage follower has input terminal and output end, and the input terminal connects bleeder circuit, described
Output end connects single-chip microcontroller.
Further, the single-chip microcontroller has voltage detecting point, and the output end of the voltage follower connects voltage detecting
Point.What is be able to detect that in voltage detecting point is the partial pressure on bleeder circuit, can judge low side by detecting the voltage of the point
Whether break down on driving circuit.
Before high-voltage relay is not closed, when voltage detecting point detects voltage, that is, two resistance pair are detected
The partial pressure of reference power source illustrates that low side driving circuit is in normal off-state, i.e. high-voltage relay is closed there is no unexpected
It closes.When high-voltage relay is closed, two resistance do not divide reference power source, therefore the electricity that voltage detecting point detects
Pressure is 0.
When voltage detecting point does not detect voltage, i.e., when voltage is 0, i.e., two resistance are to the partial pressure of reference power source
0, short trouble occurs for low side driving circuit.
When there is open circuit failure in low side driving circuit, before high-voltage relay is not closed, to voltage detecting point
Voltage is detected, and is also able to detect that is 0 voltage in voltage detecting point at this time, therefore will appear and be mistakenly considered short circuit
The problem of, it needs to report driving circuit failure at this time, when carrying out malfunction elimination, judgement is the electricity that short trouble causes to detect
Pressure be 0 or open circuit fault to cause the voltage detected be 0.
Further, on the single-chip microcontroller also there is piece interface, master to be selected to go out from incoming interface, master to enter from outgoing interface and clock to connect
Mouthful.
Further, described is selected interface, the master to go out to enter from incoming interface, the master from outgoing interface and the clock interface
Connect low side driving chip.It is main equipment output data that the master, which goes out from incoming interface, from the interface of equipment input data, the master
Entering from outgoing interface is main equipment input data, from the interface of equipment output data.
The second aspect of the utility model proposes a kind of battery pack, and the battery pack has diagnosis function with above-mentioned
The low side driving circuit of energy.
The battery pack is able to carry out high voltage power supply distribution, and the battery pack realizes high voltage power supply by high-voltage relay
Distribution, high-voltage relay is controlled.
The low side driving circuit before not closed high-voltage relay, is examined voltage detecting point after low pressure powers on
It surveys, whether voltage is detected by voltage detecting point, it can be determined that the problem of high-voltage relay is with the presence or absence of unexpected closure, and sentence
The low side driving circuit that breaks enables high-voltage relay operational excellence with the presence or absence of the failure of short circuit, transports under secure conditions
Row.
And the low side driving circuit, when open circuit failure occurs, voltage detecting point can equally detect that voltage is 0, because
This, feeds back the failure detected by the way of reporting driving circuit failure.When carrying out malfunction elimination, judgement is short trouble
Cause the voltage detected be 0 or open circuit fault to cause the voltage detected be 0.
By adopting the above technical scheme, a kind of low side driving circuit and battery with diagnostic function described in the utility model
Packet, has the following beneficial effects:
1) the utility model proposes a kind of low side driving circuit with diagnostic function, the low side driving circuit pass through
Bleeder circuit and feed circuit, may be implemented self diagnosis, can be to height by the voltage of voltage detecting point on detection single-chip microcontroller
Whether normally closed and short trouble are detected potential relay, therefore improve the safety of low side driving circuit, so that low
Side driving circuit is more reliable；
2) the utility model proposes a kind of battery pack, the battery pack has low side driving circuit, the low side driving
Circuit has diagnostic function, so that whether battery pack can obtain relay when carrying out high voltage power supply distribution by relay
The prompting of normally closed and short trouble, therefore improve security performance.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of circuit diagram of the low side driving circuit with diagnostic function provided by the embodiment of the utility model；
Fig. 2 is the signal transmission schematic diagram of single-chip microcontroller provided by the embodiment of the utility model and low side driving chip.
The following are the further supplementary explanations of attached drawing:
1- single-chip microcontroller, the low side driving chip of 2-, 3- high-voltage relay, 4- first resistor, 5- second resistance, 6- operation amplifier
Device, 7- voltage detecting point.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe.Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are in the premise for not making creative work
Under every other embodiment obtained, fall within the protection scope of the utility model.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", 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, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
Embodiment 1:
The utility model embodiment proposes a kind of low side driving circuit with diagnostic function, and the circuit includes monolithic
Machine 1, low side driving chip 2, high-voltage relay 3, driving power, bleeder circuit and feed circuit.
The single-chip microcontroller 1 connects low side driving chip 2, and the low side driving chip 2 connects high-voltage relay 3, the height
The other end of potential relay 3 connects driving power.One end of the bleeder circuit is connected to high-voltage relay 3 and low side driving core
Between piece 2.Described feed circuit one end connects bleeder circuit, and the other end of the feed circuit connects single-chip microcontroller 1.
The single-chip microcontroller 1 is control module, and the single-chip microcontroller 1 is realized entirely by the control to low side driving chip 2
Low side control, the high-voltage relay 3 play the role of the connection conducting of high tension loop.
The bleeder circuit includes first resistor 4, second resistance 5 and reference power source, the first resistor 4 and second resistance
5 is in parallel, and one end of the first resistor 4 is connect with feed circuit, high-voltage relay 3 and low side driving chip 2, other end connection
Reference power source.One end of the second resistance 5 is connect with feed circuit, high-voltage relay 3 and low side driving chip 2, the other end
Ground connection.
The feed circuit includes voltage follower, and the voltage follower is made of operational amplifier 6, the voltage with
The transmittability of entire feedback signal can be improved with device.The input terminal of the voltage follower is connect with bleeder circuit, i.e., with
First resistor 4 and second resistance 5 connect, and the output end of the voltage follower is connected on single-chip microcontroller 1.
The single-chip microcontroller 1 has voltage detecting point 7, and the output end of the voltage follower is connected in voltage detecting point 7.
What is be able to detect that in voltage detecting point 7 is the partial pressure on bleeder circuit, can judge that low side is driven by detecting the voltage of the point
Whether break down on dynamic circuit.
As shown in Fig. 2, on the single-chip microcontroller 1 also there is piece interface, master to be selected to go out from incoming interface, master to enter from outgoing interface and clock
Interface, described is selected interface, the master to go out from incoming interface, the master to enter to connect low side driving with the clock interface from outgoing interface
Chip 2.It is main equipment output data that the master, which goes out from incoming interface, and from the interface of equipment input data, the master enters from outgoing interface
For main equipment input data, from the interface of equipment output data.
Before high-voltage relay 3 is not closed, the voltage of voltage detecting point 7 is detected, when voltage detecting point 7 detects
When to voltage, illustrate first resistor 4 and 5 junction of second resistance there are voltage value, the voltage value is the two resistance to ginseng
The partial pressure for examining power supply illustrates that low side driving circuit is in normal off-state, i.e. high-voltage relay 3 is closed there is no unexpected
It closes.When high-voltage relay 3 is closed, two resistance do not divide reference power source, and voltage detecting point 7 detects at this time
Voltage is 0.
Before high-voltage relay 3 is not closed, the voltage of voltage detecting point 7 is detected, when voltage detecting point 7 does not have
When detecting voltage, i.e., when voltage is 0, illustrate that there is no voltage value, i.e. two electricity for first resistor 4 and 5 junction of second resistance
Hindering to the partial pressure of reference power source is 0, illustrates that short trouble occurs for low side driving circuit.
When there is open circuit failure in low side driving circuit, before high-voltage relay 3 is not closed, to voltage detecting point 7
Voltage detected, the voltage for being 0 is also able to detect that in voltage detecting point 7 at this time, therefore will appear and be mistakenly considered
The problem of short circuit, needs to report driving circuit failure at this time, when carrying out malfunction elimination, judgement is that short trouble causes to detect
Voltage be 0 or open circuit fault to cause the voltage detected be 0.
The utility model proposes a kind of low side driving circuit with diagnostic function, the low side driving circuit have point
Volt circuit and feed circuit, the feed circuit are connected to the voltage detecting point 7 on single-chip microcontroller 1.It is not closed after low pressure powers on
Before high-voltage relay 3, voltage detecting point 7 is detected, whether voltage is detected by voltage detecting point 7, it can be determined that
The problem of high-voltage relay 3 is with the presence or absence of unexpected closure, and low side driving circuit is judged with the presence or absence of the failure of short circuit, to make
It is safer and reliable to obtain relay drive circuit.
Embodiment 2:
The utility model embodiment proposes a kind of battery pack, and the battery pack includes above-mentioned low side driving circuit, institute
Low side driving circuit is stated with self-diagnosing function.
The battery pack is able to carry out high voltage power supply distribution, and the battery pack realizes high-voltage electricity by high-voltage relay 3
The distribution in source controls high-voltage relay 3.
The low side driving circuit is after low pressure powers on, and before not closed high-voltage relay 3, carries out to voltage detecting point 7
Whether detection, detect voltage by voltage detecting point 7, it can be determined that the problem of high-voltage relay 3 is with the presence or absence of unexpected closure,
And judge that low side driving circuit enables 3 operational excellence of high-voltage relay with the presence or absence of the failure of short circuit, and in the item of safety
It is run under part, therefore reduces risk when battery pack carries out high voltage power supply distribution, so that battery pack carries out high voltage power supply distribution
When it is safer.
And the low side driving circuit, when open circuit failure occurs, voltage detecting point 7 can equally detect that voltage is 0, because
This, feeds back the failure detected by the way of reporting driving circuit failure.When carrying out malfunction elimination, judgement is short trouble
Cause the voltage detected be 0 or open circuit fault to cause the voltage detected be 0.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all practical at this
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (9)
1. a kind of low side driving circuit with diagnostic function, which is characterized in that the circuit includes: single-chip microcontroller (1), the drive of low side
Dynamic chip (2), high-voltage relay (3), driving power, bleeder circuit and feed circuit；
The single-chip microcontroller (1) connects low side driving chip (2), low side driving chip (2) connection high-voltage relay (3), institute
State the other end connection driving power of high-voltage relay (3)；
One end of the bleeder circuit is connected between high-voltage relay (3) and low side driving chip (2)；
Described feed circuit one end connects bleeder circuit, and the other end of the feed circuit connects single-chip microcontroller (1).
2. a kind of low side driving circuit with diagnostic function according to claim 1, which is characterized in that the partial pressure electricity
Road includes first resistor (4), second resistance (5) and reference power source, and the first resistor (4) and second resistance (5) are in parallel.
3. a kind of low side driving circuit with diagnostic function according to claim 2, which is characterized in that first electricity
One end of resistance (4) is connect with feed circuit, high-voltage relay (3) and low side driving chip (2), and the other end connects reference power source；
One end of the second resistance (5) is connect with feed circuit, high-voltage relay (3) and low side driving chip (2), the other end
Ground connection.
4. a kind of low side driving circuit with diagnostic function according to claim 1, which is characterized in that the feedback electricity
Road includes voltage follower.
5. a kind of low side driving circuit with diagnostic function according to claim 4, which is characterized in that the voltage with
There is input terminal and output end with device, the input terminal connects bleeder circuit, and the output end connects single-chip microcontroller (1).
6. a kind of low side driving circuit with diagnostic function according to claim 5, which is characterized in that the single-chip microcontroller
(1) there are voltage detecting point (7), the output end of the voltage follower connects voltage detecting point (7).
7. a kind of low side driving circuit with diagnostic function according to claim 1, which is characterized in that the single-chip microcontroller
(1) on also there is piece interface, master to be selected to go out from incoming interface, master to enter from outgoing interface and clock interface.
8. a kind of low side driving circuit with diagnostic function according to claim 7, which is characterized in that described choosing connects
Mouth, the master go out to enter to connect low side driving chip (2) with the clock interface from outgoing interface from incoming interface, the master.
9. a kind of battery pack, which is characterized in that the battery pack with described in claims 1 to 7 any one have diagnosis
The low side driving circuit of function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821301699.5U CN208522052U (en) | 2018-08-10 | 2018-08-10 | A kind of low side driving circuit and battery pack with diagnostic function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821301699.5U CN208522052U (en) | 2018-08-10 | 2018-08-10 | A kind of low side driving circuit and battery pack with diagnostic function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208522052U true CN208522052U (en) | 2019-02-19 |
Family
ID=65333821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821301699.5U Active CN208522052U (en) | 2018-08-10 | 2018-08-10 | A kind of low side driving circuit and battery pack with diagnostic function |
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| CN (1) | CN208522052U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110994544A (en) * | 2019-04-30 | 2020-04-10 | 宁德时代新能源科技股份有限公司 | Active fuse control method and circuit, first and second control device |
| CN112444720A (en) * | 2019-08-30 | 2021-03-05 | 宁德时代新能源科技股份有限公司 | Detection circuit and detection method of electric control device |
-
2018
- 2018-08-10 CN CN201821301699.5U patent/CN208522052U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110994544A (en) * | 2019-04-30 | 2020-04-10 | 宁德时代新能源科技股份有限公司 | Active fuse control method and circuit, first and second control device |
| CN110994544B (en) * | 2019-04-30 | 2021-10-08 | 宁德时代新能源科技股份有限公司 | Active fuse control method and circuit, first and second control device |
| CN112444720A (en) * | 2019-08-30 | 2021-03-05 | 宁德时代新能源科技股份有限公司 | Detection circuit and detection method of electric control device |
| US11435389B2 (en) | 2019-08-30 | 2022-09-06 | Contemporary Amperex Technology Co., Limited | Electrical control device detection circuit, detection method, and electric vehicle |
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