CN210652696U - New energy automobile and low-voltage power supply circuit thereof - Google Patents
New energy automobile and low-voltage power supply circuit thereof Download PDFInfo
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- CN210652696U CN210652696U CN201920744133.8U CN201920744133U CN210652696U CN 210652696 U CN210652696 U CN 210652696U CN 201920744133 U CN201920744133 U CN 201920744133U CN 210652696 U CN210652696 U CN 210652696U
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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
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- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Abstract
The utility model relates to a new energy automobile and low pressure supply circuit thereof belongs to new energy automobile low pressure power supply system technical field, and this low pressure supply circuit includes battery and DC converter, and the electric energy output of battery is provided with first voltage monitoring module, the electric energy output of battery with be used for supplying power to connect and be provided with first power supply control switch on the first power supply line between the port of relevant low-voltage apparatus, first voltage monitoring module control connection first power supply control switch for control when the voltage of the electric energy output of battery is less than or equal to the setting value first power supply control switch disconnection. The problem that low-voltage equipment cannot work normally when a storage battery breaks down is solved.
Description
Technical Field
The utility model relates to a new energy automobile and low pressure supply circuit thereof belongs to new energy automobile low pressure power supply system technical field.
Background
The existing new energy automobile does not adopt an engine and traditional related accessories any more, but adopts a main driving motor and control system, an electric air compressor and control system, an electric hydraulic steering power-assisted and control system, an electric air-conditioning compressor and control system and electric defrosting, namely, the driving system and the accessory system adopt electric parts, and because of no engine, a corresponding low-voltage generator is cancelled, and a DC/DC converter is adopted to charge a low-voltage storage battery of the whole automobile. The control power supply of all high-voltage motorized parts corresponding to the controller is a low-voltage power supply, the low voltage is provided by a storage battery or a DC/DC converter, and the DC/DC converter is essentially a device for converting a direct-current power supply with one voltage into a direct-current power supply with another voltage and belongs to a switching power supply.
At present, ON the low-voltage power supply principle diagram of most new energy automobiles, only a normal fire switch, a main fire switch, an ACC fire switch and an ON fire switch of a key switch, corresponding contactors, relays and fuses are arranged, and a negative pole is connected with an automobile body in a bonding mode. In a conventional low-voltage power supply mode of the existing new energy automobile, under a normal condition, after the whole automobile is electrified at high voltage, the electric parts immediately work according to control requirements after giving control signals. The electric parts can work normally if the following conditions occur respectively.
1) After the whole vehicle is electrified at high voltage, the power supply of the storage battery of the whole vehicle is cut off (such as turning off the normal fire of a low-voltage handle switch of the whole vehicle or turning off the total fire of a rocker switch);
2) the storage battery wire harness falls off from the whole running vehicle due to other reasons;
3) after the whole vehicle is electrified at high voltage, the DC/DC converter fails and does not output voltage to the outside.
For example, chinese utility model patent with the publication number CN205186269U and the name "a vehicle dual-source low-voltage power steering system" discloses a vehicle dual-source low-voltage power supply circuit, the power output end of the low-voltage battery supplies power to connect with the low-voltage device, the power output end of the DC/DC converter supplies power to connect with the low-voltage device, and then the low-voltage output end of the DC/DC converter can also charge for the low-voltage battery.
However, during the operation of the whole vehicle, when the storage battery fails, the following situations of the storage battery can occur: the battery is because the trouble appears, external output voltage is very low, because the electric energy output of low pressure battery is connected with the low-voltage electricity output of DC/DC converter, then, the battery of trouble will draw the output voltage of the low-voltage electricity output of DC/DC converter down, make whole car low voltage power supply under-voltage, low-voltage equipment can be because of the low-voltage electricity supply voltage low phenomenon that can not normally work that appears, generally because the supply voltage of the control end of the controller of low-voltage equipment is low excessively, lead to relevant low-voltage equipment, for example, motorized drive system and accessory system can not normally work or stop work, for example: when the storage battery is in fault, the power-assisted steering system of the whole vehicle or the electric air compressor of the braking power source stops working suddenly, the whole vehicle loses power-assisted steering, and the braking air source is insufficient, so that great potential safety hazards exist, and traffic accidents are easily caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a low-voltage power supply circuit of a new energy automobile, which is used for solving the problem that low-voltage equipment cannot work normally when a storage battery fails; meanwhile, the new energy automobile is further provided and used for solving the problem that low-voltage equipment cannot normally work when a storage battery fails in the new energy automobile.
In order to achieve the above purpose, the technical scheme of the utility model is that: the utility model provides a low-voltage power supply circuit of a new energy automobile, which comprises a storage battery and a DC/DC converter, the electric energy output end of the storage battery is connected with one end of a first power supply circuit, the first power supply circuit is provided with a port for supplying power and connecting related low-voltage equipment, the low-voltage output end of the DC/DC converter is connected with one end of a second power supply circuit, the other end of the second power supply circuit is connected with the first power supply circuit, the electric energy output end of the storage battery is provided with a first voltage monitoring module, a first power supply control switch is arranged on a first power supply circuit between the electric energy output end of the storage battery and the port for supplying power to connect the related low-voltage equipment, the first voltage monitoring module is connected with the first power supply control switch in a control way, and the first power supply control switch is controlled to be switched off when the voltage output by the electric energy output end of the storage battery is smaller than or equal to a set value.
The utility model provides a new energy automobile, which comprises an automobile body and a low-voltage power supply circuit; the low-voltage power supply circuit comprises a storage battery and a DC/DC converter, the electric energy output end of the storage battery is connected with one end of a first power supply circuit, the first power supply line is provided with a port for supplying power to connect with related low-voltage equipment, the low-voltage output end of the DC/DC converter is connected with one end of the second power supply line, the other end of the second power supply circuit is connected with the first power supply circuit, the electric energy output end of the storage battery is provided with a first voltage monitoring module, a first power supply control switch is arranged on a first power supply circuit between the electric energy output end of the storage battery and the port for supplying power to connect the related low-voltage equipment, the first voltage monitoring module is connected with the first power supply control switch in a control way, and the first power supply control switch is controlled to be switched off when the voltage output by the electric energy output end of the storage battery is smaller than or equal to a set value.
The utility model discloses a new energy automobile and low pressure supply circuit thereof, through setting up corresponding voltage detection module at the battery output, gather its supply voltage in real time, when the output voltage of battery appears and is less than or equal to the setting value, the power supply control switch on the first power supply line of control, the complete isolation with the battery has been realized, supply low voltage power supply by another way DC/DC converter independent for the electronic spare part controller of whole car, ensure the continuation work of electronic spare part, whole car low pressure power supply's reliability has been improved, whole car operation safety has been improved.
Further, for the new energy automobile and the low-voltage power supply circuit thereof, in order to obtain a protection circuit with a simple structure, the first voltage monitoring module is a control coil of a first relay, two ends of the control coil of the first relay are used for being connected with an electric energy output end of the storage battery so as to detect the voltage of the electric energy output end of the storage battery, and the first power supply control switch is a normally open contact of the first relay.
Further, to above-mentioned new energy automobile and low voltage supply circuit thereof, in order to improve whole car low voltage power supply's reliability, the low-voltage output of DC/DC converter is provided with second voltage monitoring module, be provided with second power supply control switch on the second power supply line, second voltage monitoring module control connection second power supply control switch for when the voltage of the low-voltage output of DC/DC converter is less than or equal to the setting value control second power supply control switch disconnection.
Further, for the new energy automobile and the low-voltage power supply circuit thereof, in order to obtain a protection circuit with a simple structure, the second voltage monitoring module is a control coil of a second relay, two ends of the control coil of the second relay are connected with a low-voltage output end of the DC/DC converter, and the second power supply control switch is a normally open contact of the second relay.
Further, to above-mentioned new energy automobile and low voltage supply circuit thereof, in order to realize the effective protection to battery energy supply process, it is often fiery to be equipped with the switch ON in ACC fire switch and the key switch in fire switch, the key switch ON the first power supply line in proper order, the port that is used for supplying power to connect relevant low-voltage apparatus includes being close to of ACC fire switch in the key switch the one end of the electric energy output of battery with being close to of ON fire switch in the key switch the one end of the electric energy output of battery.
Further, for the new energy automobile and the low-voltage power supply circuit thereof, in order to realize power supply output of the DC/DC converter, the other end of the second power supply line is connected with one end, away from the electric energy output end of the storage battery, of the ON fire switch in the key switch.
Further, for the new energy automobile and the low-voltage power supply circuit thereof, in order to obtain a specific setting position of the first power supply control switch, the normally open contact of the first relay is arranged on the first power supply line between the main fire switch and the ACC fire switch in the key switch.
Further, for the new energy automobile and the low-voltage power supply circuit thereof, in order to obtain effective power supply of the storage battery to the controller, the positive end of the electric energy output end of the storage battery is connected with one end of a first power supply line, one end of a control coil of the first relay is connected with a connection point between the normal fire switch and the main fire switch, and the other end of the control coil of the first relay is connected with the negative end of the electric energy output end of the storage battery.
Drawings
Fig. 1 is a schematic diagram of a low-voltage power supply circuit according to a first embodiment of the present invention;
fig. 2 is a schematic diagram of a low-voltage power supply circuit in a second embodiment of the low-voltage power supply circuit of the present invention.
Detailed Description
The utility model provides a new energy automobile's low pressure supply circuit, including battery and DC/DC converter, the one end of first power supply line is connected to the electric energy output of battery, is provided with the port that is used for the power supply to connect relevant low-voltage apparatus on the first power supply line, and the one end of second power supply line is connected to the low-voltage electric output of DC/DC converter, and the other end of second power supply line is connected first power supply line, the electric energy output of battery are provided with first voltage monitoring module, the electric energy output of battery with be used for the power supply to connect first power supply line between the port of relevant low-voltage apparatus and be provided with first power supply control switch, first power supply control switch of first voltage monitoring module control connection.
If the whole vehicle runs normally, the storage battery is in fault, the first voltage monitoring module detects that the voltage of the electric energy output end of the storage battery is lower than a set value, the first power supply control switch is directly disconnected, the storage battery is cut off from the power supply line, the driver is prompted to make an emergency when the instrument reports the fault, and meanwhile, the DC/DC converter independently supplies a low-voltage power supply to the electric part controller of the whole vehicle, so that the electric parts are ensured to work continuously.
Embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
At present, ON the low-voltage power supply principle diagram of most new energy automobiles, only a normal fire switch, a main fire switch, an ACC fire switch and an ON fire switch of a key switch, corresponding contactors, relays and fuses are arranged, and a negative pole is connected with an automobile body in a bonding mode. The utility model is improved on the conventional power supply principle drawing at present, a specifically designed low-voltage power supply circuit is shown in figure 1, and a normal fire is generally used for supplying power to doors, windows and the like; general fire is generally used for interior small lamps and the like; the ACC fire is generally used for supplying power to radio, CD player and other devices; except that the whole vehicle is not started, the low-voltage parts and equipment of the whole vehicle can be normally powered ON by the ON fire. And the corresponding switches of different fires are opened, and then the corresponding low-voltage equipment switches are opened, so that the low-voltage equipment can normally work. In the circuit structure shown in fig. 1, KM1 is a normal fire switch, and a real vehicle is a low-voltage handle switch; KM2 is a main fire switch, and the real vehicle is a rocker switch; KM3 is ACC gear of ignition key; KM4 is ON gear of ignition key; the ST is a START gear of an ignition key, the ST is an automatic reset switch, the ST can automatically return to an ON gear after the gear is started, in addition, in order to keep consistent with the ignition logic of a traditional vehicle, adjustment is carried out ON the whole vehicle control strategy, namely the whole vehicle controller is required to allow driving after receiving an ST connection signal, therefore, a driving allowing instruction needs to be sent to the whole vehicle controller, then an instrument displays a READY state, the whole vehicle is in a driving preparation state, the specific operation is that the START gear is screwed through the ignition key, an ST switch signal is instantly sent to the whole vehicle control, the whole vehicle controller receives the driving instruction, and driving is allowed after the gear is engaged.
First embodiment of the low voltage power supply circuit:
use voltage relay's control coil as first voltage monitoring module in this embodiment to this voltage relay's control coil control connection's normally open contact is as first power supply control switch for the example, and is right the technical scheme of the utility model make detailed description.
The working principle of the voltage relay is as follows: when the voltage of the control coil is larger than a set value, the normally open contact is closed; when the voltage of the control coil is smaller than a set value, the normally open contact is in a disconnected state. As shown in fig. 1, KV1 is a voltage relay designed at the output end of the storage battery, and is controlled to be turned on and off by the voltage of the storage battery itself, R01 is an equivalent resistance of a branch where a control coil of the voltage relay KV1 is located, and the coil is inductive and does not work with a dc circuit, and the branch where the control coil of the voltage relay is located itself has a certain resistance, and only generates a small amount of heat, which can be ignored, so the voltage of the control coil of the voltage relay KV1 in this embodiment is equal to the voltage at the output end of the storage battery, and the voltage relay KV2 in the following second embodiment of the.
The low-voltage power supply circuit comprises a storage battery, a DC/DC converter, a first power supply circuit and a second power supply circuit, wherein the electric energy output end of the storage battery is connected with one end of the first power supply circuit, a port for supplying power to be connected with related low-voltage equipment is arranged on the first power supply circuit, the low-voltage output end of the DC/DC converter is connected with one end of the second power supply circuit, the other end of the second power supply circuit is connected with the first power supply circuit, the electric energy output end of the storage battery is provided with a control coil of a voltage relay, and the normally open contact for controlling connection of the voltage relay control coil is arranged on a first power supply line between the electric energy output end of the storage battery and the port for supplying power to connect the related low-voltage equipment, and is used for cutting off the power supply output of the storage battery when the power supply of the storage battery is abnormal.
In this embodiment, the first power supply control switch, that is, the normally open contact of the voltage relay KV1, is specifically disposed on the power supply line between the end of the main fire switch away from the battery and the end of the ACC fire switch close to the battery, as another embodiment, the first power supply control switch may also be disposed at another position in the first power supply line as long as it can reliably supply the necessary low-voltage power supply device, for example, on the power supply line between the connection point of the first power supply line and the main fire switch of the first voltage monitoring module as shown in fig. 1, so that when the battery is abnormal, the DC/DC converter may also supply power to the voltage component controlled by the main fire switch; the low-voltage control device can also be arranged between an ACC fire switch and an ON fire switch, so that when the storage battery is abnormal, the reliable power supply of necessary low-voltage parts behind the ON fire switch in a first power supply line is ensured, and particularly the low-voltage control device of high-voltage parts influencing the steering and braking safety of the whole vehicle is arranged.
When the main fire switch is closed, the voltage applied to the control coil of the voltage relay KV1 meets the preset voltage, the control coil of the voltage relay KV1 is electrified and controls the internal action, the normally open contact of the voltage relay KV1 is closed, and the storage battery is connected into the circuit; the function of the storage battery is to provide a stable low-voltage power supply for the whole vehicle, store low-voltage electric energy to provide continuous electric energy, and most importantly, ensure that the whole vehicle can be started normally. The DC/DC converter has the most important function of charging the storage battery of the whole vehicle, and can provide a low-voltage power supply for low-voltage parts of the whole vehicle when the DC/DC converter works.
When the whole vehicle is in a static state to a running state, a normal fire switch is turned on firstly, namely a handle switch KM1 of the low-voltage storage battery is switched on; then, the main fire switch is turned on the instrument desk, and the rocker switch KM2 is turned on. At the moment, if the control coil of the voltage relay KV1 connected to the output end of the storage battery detects that the voltage of the storage battery is greater than the set value, the normally open contact of the voltage relay KV1 is closed. If the voltage of the storage battery is smaller than a set value, a normally open contact of a voltage relay KV1 is disconnected, and a low-voltage power supply of the whole vehicle cannot be connected, so that the storage battery needs to be subjected to fault troubleshooting and processing, and if the storage battery is checked to be insufficient, the storage battery is charged and then returns to be normal; and if the battery line is detected to fall off and have poor contact, fastening the wire harness. After the fault is relieved, a driver inserts a key, turns on the key switch to an ACC gear, and switches on an ACC fire switch; and then, turning the key to an ON gear, turning ON the key, powering ON the ON, electrifying the electric part controller of the whole automobile, combining corresponding contactors of the electric part controller, continuing turning the key to the START gear, receiving a driving permission instruction by the whole automobile controller, displaying a READY state by the instrument, and starting to work when the electric part controller receives an enabling control signal. The DC/DC converter works and outputs low voltage, supplies power to low-voltage parts of the whole vehicle, and also charges the storage battery, so that the voltage stability of the storage battery is ensured, the electric quantity is sufficient and cannot be insufficient, and the whole vehicle can be restarted normally next time.
If the whole vehicle runs normally, the storage battery is in fault, the control coil of the voltage relay KV1 detects that the output voltage is lower than a set value, the normally open contact of the voltage relay KV1 is directly disconnected, the storage battery is cut off from the circuit, when an instrument and the like report faults, a driver is prompted to make an emergency, and meanwhile, the DC/DC converter independently supplies a low-voltage power supply to an electric part controller of the whole vehicle, so that the electric parts are ensured to work continuously.
Through the circuit structure, the power supply stability of the low-voltage power supply circuit of the whole vehicle is greatly enhanced, the working reliability of electric parts of the whole vehicle is improved, the reliability of a safety system (steering and braking system) of the whole vehicle is particularly improved, and traffic accidents are greatly reduced. There is also an advantage: when the vehicle is parked for a long time, the voltage relay is in a disconnected state, so that static leakage current can be reduced, and the power shortage probability of the storage battery is reduced.
Second embodiment of low-voltage power supply circuit:
the present embodiment is different from the first power supply circuit embodiment only in that the present embodiment further includes a second voltage monitoring module disposed at the power supply output end of the DC/DC converter, a second power supply control switch is disposed on the second power supply line, the second voltage monitoring module is connected to the second power supply control switch in a control manner, and the second power supply control switch is controlled to be turned off when the voltage output by the low voltage output end of the DC/DC converter is less than or equal to a set value.
Specifically, a control coil of the voltage relay is taken as the second voltage detection module, and a normally open contact controlled and connected by the control coil is taken as the second power supply control switch as an example. As shown in fig. 2, KV2 is a voltage relay designed at the output end of the DC/DC converter, and is controlled to be switched ON and off by the output voltage of the DC/DC converter, two ends of a control coil of the voltage relay KV2 are connected to the output end of the DC/DC converter for detecting the voltage at the power supply output end, a normally open contact controlled by the control coil is arranged ON the second power supply line, when a key is turned to an ON-position, the DC/DC converter normally outputs a low voltage, when the output voltage is higher than the control coil operating voltage of the voltage relay KV2, the control coil of the voltage relay KV2 is powered and controls the internal operation, the normally open contact of the voltage relay KV2 is closed, and the DC/DC converter is formally connected to a circuit to supply power to a low-voltage electrical appliance.
Whether the DC/DC converter outputs depends ON whether the entire vehicle ON fire is effective or not and whether the control signal of the DC/DC converter itself is effective or not. After ON fire is effective, the controllers of the electric driving system and the accessory system control the low-voltage power supply to be effective, meanwhile, the high-voltage input end of the controller is electrified, and when the corresponding controllers of the electric parts receive start-up control enabling signals, the corresponding electric parts are started and start to work normally. The electric air conditioner mainly comprises a main driving motor and control system, an electric air compressor and control system, an electric hydraulic steering power-assisted and control system, an electric air conditioner compressor and control system, electric defrosting, a DC/DC converter and the like.
If the whole vehicle is in normal running, the DC/DC converter has a fault, the output low voltage of the DC/DC converter is abnormal, or no low voltage output exists, a control coil of the voltage relay KV2 detects that the output voltage of the DC/DC converter is lower than a set value, a normally open contact of the voltage relay KV2 is directly disconnected, the DC/DC converter is cut off from the circuit, when an instrument and the like reports a fault, a driver is prompted to make an emergency, meanwhile, a storage battery of the whole vehicle independently supplies a low-voltage power supply for an electric part controller of the whole vehicle, the electric parts are ensured to continuously work, the safety of the whole vehicle in running is ensured, the steering power assisting and braking can be normal, the whole vehicle in running can be ensured to normally operate a steering wheel and brake, and the whole vehicle.
The main forms of unstable or excessively low voltage power supply of the whole vehicle in the two embodiments are as follows: if one of the storage battery or the DC/DC converter has a fault, the external output voltage is very low, and the voltage of the other power supply is reduced, so that the low-voltage power supply of the whole vehicle is under-voltage, and the control ends of all the controllers cannot normally work due to the fact that the power supply voltage of the low-voltage power supply is too low. Through the two implementation modes, the voltage relays are designed on the two low-voltage power supplies, the respective power supply voltages are collected in real time, the other power supply is protected, and the mutual influence of the two low-voltage power supplies is avoided.
As an improvement to the above embodiment, the voltage monitoring module disposed at the energy supply output end of the low-voltage power supply and the control switch disposed in the power supply line may also be implemented by a voltage sensor, a controller and a switch, where the voltage sensor monitors the voltage at the port and the controller controls the on/off of the switch, and the specific process of controlling the on/off of the switch is the prior art.
As a further improvement to the above embodiment, the two voltage monitoring modules may be respectively designed inside the battery and the DC/DC converter, or may be designed in an external circuit. For example, the control coil of the voltage relay in the above embodiment may be provided inside the battery.
New energy automobile embodiment:
the embodiment provides a new energy automobile, which comprises an automobile body and a low-voltage power supply circuit, wherein the low-voltage power supply circuit is the power supply circuit provided in the two embodiments, and details are not repeated herein.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention, therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (9)
1. A low-voltage power supply circuit of a new energy automobile comprises a storage battery and a DC/DC converter, the electric energy output end of the storage battery is connected with one end of a first power supply circuit, the first power supply circuit is provided with a port for supplying power and connecting related low-voltage equipment, the low-voltage output end of the DC/DC converter is connected with one end of a second power supply circuit, the other end of the second power supply circuit is connected with the first power supply circuit, it is characterized in that the electric energy output end of the storage battery is provided with a first voltage monitoring module, a first power supply control switch is arranged on a first power supply circuit between the electric energy output end of the storage battery and the port for supplying power and connecting the related low-voltage equipment, the first voltage monitoring module is connected with the first power supply control switch in a control way, and the first power supply control switch is controlled to be switched off when the voltage output by the electric energy output end of the storage battery is smaller than or equal to a set value.
2. The low-voltage power supply circuit of the new energy automobile according to claim 1, wherein the first voltage monitoring module is a control coil of a first relay, two ends of the control coil of the first relay are used for connecting the power output end of the storage battery to detect the voltage of the power output end of the storage battery, and the first power supply control switch is a normally open contact of the first relay.
3. The low-voltage power supply circuit of the new energy automobile according to claim 2, wherein a second voltage monitoring module is disposed at the low-voltage output end of the DC/DC converter, a second power supply control switch is disposed on the second power supply line, and the second voltage monitoring module is connected to the second power supply control switch in a control manner, and is configured to control the second power supply control switch to be turned off when the voltage output by the low-voltage output end of the DC/DC converter is less than or equal to a set value.
4. The low-voltage power supply circuit of the new energy automobile according to claim 3, wherein the second voltage monitoring module is a control coil of a second relay, two ends of the control coil of the second relay are connected to the low-voltage output end of the DC/DC converter, and the second power supply control switch is a normally open contact of the second relay.
5. The low voltage power supply circuit of new energy automobile according to claim 2 or 3 or 4, characterized in that, the first power supply line is provided with a normal fire switch, a main fire switch, an ACC fire switch in a key switch and an ON fire switch in the key switch in series in this order, and the port for supplying power to connect the relevant low voltage equipment comprises one end of the ACC fire switch in the key switch close to the power output end of the storage battery and one end of the ON fire switch in the key switch close to the power output end of the storage battery.
6. The low-voltage power supply circuit of the new energy automobile is characterized in that the other end of the second power supply line is connected with one end, away from the electric energy output end of the storage battery, of an ON fire switch in the key switch.
7. The low voltage power supply circuit of new energy automobile according to claim 6, characterized in that, the normally open contact of first relay is arranged on the first power supply line between the main fire switch and the ACC fire switch in the key switch.
8. The low-voltage power supply circuit of the new energy automobile as claimed in claim 6, wherein a positive terminal of the power output end of the storage battery is connected to one end of a first power supply line, one end of the control coil of the first relay is connected to a connection point between the normal fire switch and the main fire switch, and the other end of the control coil of the first relay is connected to a negative terminal of the power output end of the storage battery.
9. A new energy automobile, which comprises an automobile body and a low-voltage power supply circuit, and is characterized in that the low-voltage power supply circuit is the low-voltage power supply circuit of the new energy automobile as claimed in any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920744133.8U CN210652696U (en) | 2019-05-22 | 2019-05-22 | New energy automobile and low-voltage power supply circuit thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920744133.8U CN210652696U (en) | 2019-05-22 | 2019-05-22 | New energy automobile and low-voltage power supply circuit thereof |
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| CN210652696U true CN210652696U (en) | 2020-06-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113895380A (en) * | 2021-10-09 | 2022-01-07 | 浙江吉利控股集团有限公司 | Vehicle power supply circuit, equipment and car |
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2019
- 2019-05-22 CN CN201920744133.8U patent/CN210652696U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113895380A (en) * | 2021-10-09 | 2022-01-07 | 浙江吉利控股集团有限公司 | Vehicle power supply circuit, equipment and car |
| CN113895380B (en) * | 2021-10-09 | 2023-08-29 | 浙江吉利控股集团有限公司 | Vehicle power supply circuit, equipment and car |
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Address after: 450061 Yudao Road, Guancheng District, Zhengzhou City, Henan Province Patentee after: Yutong Bus Co.,Ltd. Address before: No.1, Shibali Heyu Road, Guancheng Hui District, Zhengzhou City, Henan Province Patentee before: ZHENGZHOU YUTONG BUS Co.,Ltd. |