CN209888793U - Power supply system for vehicle and vehicle with same - Google Patents
Power supply system for vehicle and vehicle with same Download PDFInfo
- Publication number
- CN209888793U CN209888793U CN201920703183.1U CN201920703183U CN209888793U CN 209888793 U CN209888793 U CN 209888793U CN 201920703183 U CN201920703183 U CN 201920703183U CN 209888793 U CN209888793 U CN 209888793U
- Authority
- CN
- China
- Prior art keywords
- power supply
- vehicle
- input end
- voltage
- power input
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Direct Current Feeding And Distribution (AREA)
Abstract
The utility model discloses a power supply system of vehicle and vehicle that has this system, wherein, the power supply system of vehicle include: a power supply input terminal; the first end of the unidirectional conduction unit is connected with the negative electrode of the power input end, the second end of the unidirectional conduction unit is connected with one end of an electric load of the vehicle, and the other end of the electric load is connected with the positive electrode of the power input end, wherein the unidirectional conduction unit is conducted when the power input end is positively connected and is cut off when the power input end is reversely connected; and the control switch is connected with the unidirectional conduction unit in parallel, and is conducted when the power supply input end is positively connected. Therefore, reverse connection prevention can be achieved, the voltage required to be borne by the control switch is low, the control switch with a low-voltage specification can be selected, the occupied size is small, and the implementation cost is low.
Description
Technical Field
The utility model relates to a vehicle field especially relates to a power supply system of vehicle and vehicle that has this system.
Background
Vehicles in the related art generally employ a diode to realize high-voltage reverse connection prevention, but can be applied only to a low-power load due to large diode loss. In order to be applied to a high-power load, the related art also provides a scheme for preventing reverse connection of high voltage, that is, whether reverse connection is performed or not is detected through an auxiliary circuit, and power supply is controlled through a relay with high voltage and high current.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, an object of the utility model is to provide a power supply system of vehicle can realize preventing reverse connection, occupies the volume less moreover, realizes that the cost is lower.
A second object of the present invention is to provide a vehicle having the system.
To achieve the above object, the present invention provides, in a first aspect, a power supply system for a vehicle, including: a power supply input terminal; the first end of the unidirectional conduction unit is connected with the negative electrode of the power input end, the second end of the unidirectional conduction unit is connected with one end of an electric load of the vehicle, and the other end of the electric load is connected with the positive electrode of the power input end, wherein the unidirectional conduction unit is conducted when the power input end is positively connected and is cut off when the power input end is reversely connected; and the control switch is connected with the unidirectional conduction unit in parallel, and is conducted when the power supply input end is positively connected.
According to the utility model provides a power supply system of vehicle connects the negative pole of power input end through the first end of unidirectional flux unit to through with control switch and unidirectional flux unit parallel connection, from this, can realize preventing the transposition, and the required voltage that bears of control switch is lower, and then can choose the control switch of low pressure specification for use, it is less to occupy the volume, realizes that the cost is lower.
In addition, the power supply system for a vehicle according to the present invention may further have the following additional features:
furthermore, the control end of the control switch is connected with the electric load, and the control switch is conducted under the control of the electric load.
Further, the power input end is connected with a high voltage direct current power supply, wherein when the positive pole of the power input end is connected with the positive pole of the high voltage direct current power supply and the negative pole of the power input end is connected with the negative pole of the high voltage direct current power supply, the power input end is connected positively; when the positive pole of the power input end is connected with the negative pole of the high-voltage direct current power supply and the negative pole of the power input end is connected with the positive pole of the high-voltage direct current power supply, the power input ends are reversely connected.
Further, the unidirectional conducting unit is a diode, wherein the cathode of the diode is connected with the cathode of the power input end, and the anode of the diode is connected with one end of the electric load of the vehicle.
Further, the diode is a low-current high-voltage diode.
Further, the control switch is a relay, a contact of the relay is connected in parallel with the unidirectional conduction unit, and a coil of the relay is connected with the electric load and controlled by the electric load.
Further, the relay is a low-voltage high-current relay.
In order to achieve the above object, the second aspect of the present invention provides a vehicle, including the power supply system of the vehicle provided by the first aspect of the present invention.
According to the utility model provides a vehicle, through the power supply system of vehicle, can realize preventing reverse connection, it is less to occupy the volume moreover, and the realization cost is lower.
Drawings
Fig. 1 is a block schematic diagram of a power supply system for a vehicle according to an embodiment of the present invention;
fig. 2 is a block schematic diagram of a power supply system for a vehicle according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a power supply system for a vehicle according to an embodiment of the present invention; and
fig. 4 is a block schematic diagram of a vehicle according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
The following describes a power supply system for a vehicle and a vehicle having the same according to an embodiment of the present invention with reference to the drawings. The power supply system of the vehicle is used for supplying power to electric loads in the vehicle.
Fig. 1 is a block schematic diagram of a power supply system of a vehicle according to an embodiment of the present invention. As shown in fig. 1, the power supply system of the vehicle includes: a power input terminal 100, a unidirectional conducting unit 103 and a control switch 102.
The first end of the unidirectional conducting unit 103 is connected with the negative electrode HV of the power input end 100, the second end of the unidirectional conducting unit 103 is connected with one end of an electric load 101 of the vehicle, the other end of the electric load 101 is connected with the positive electrode HV + of the power input end 100, and the unidirectional conducting unit 103 is conducted when the power input end 100 is positively connected and is cut off when the power input end 100 is reversely connected; the control switch 102 is connected in parallel with the unidirectional conducting unit 103, and the control switch 102 is conducted when the power input terminal 100 is connected positively.
It should be noted that, in the embodiment of the present invention, the power input terminal 100 may be a dc power input terminal, and specifically, the power input terminal 100 may be connected to a high voltage dc power source, for example, the voltage of the high voltage dc power source may be between 300V and 600V. When the positive electrode HV + of the power input end 100 is connected with the positive electrode of the high-voltage direct-current power supply and the negative electrode HV-of the power input end 100 is connected with the negative electrode of the high-voltage direct-current power supply, the power input end 100 is positively connected; when the positive pole HV + of the power input 100 is connected to the negative pole of the high voltage dc supply and the negative pole HV-of the power input 100 is connected to the positive pole of the high voltage dc supply, the power input 100 is reversed.
That is, due to the unidirectional conductive characteristic of the unidirectional conducting unit 103, when the power input terminal 100 is reversely connected, the unidirectional conducting unit 103 is turned off, and the high voltage dc power supply does not supply power to the electrical load 101, so that the reverse connection can be ensured without damaging the circuit when the power supply is powered on. When the power input terminal 100 is connected positively, the unidirectional conducting unit 103 is conducted, and the high-voltage direct-current power supply can supply power to the electric load 101, so that power supply can be realized when the power supply is connected normally.
And, control switch 102 and unidirectional conducting unit 103 are connected in parallel, when power input 100 connects conversely, control switch 102 is in the normally open state, at this moment, control switch 102 only needs to bear the back pressure, can choose for use the low-voltage device, effectively reduce the volume occupied, and reduce cost. When the power input end 100 is positively connected, the electric load 101 enters a standby state, then, when the electric load 101 needs to be started, a driving signal can be provided for the control switch 102 to enable the control switch 102 to be attracted, and the control switch 102 only needs to bear the positive voltage drop of the one-way conduction unit 103, so that the low-voltage specification can be selected, electric arcs can be prevented from being generated in the processes of point opening and closing, and the loss is effectively reduced.
Further, according to an embodiment of the present invention, as shown in fig. 2, a control terminal of the control switch 102 is connected to the electrical load 101, and the control switch 102 can be turned on under the control of the electrical load 101. The electric load 101 may be provided therein with a control chip, and the control chip may control the control switch 101 as required, for example, when the power input terminal 100 is connected, the electric load 101 enters a standby state, and then the control chip may provide a driving signal to the control switch 102 as required to pull in the control switch 102.
According to an embodiment of the present invention, as shown in fig. 3, the one-way conducting unit 103 may be a diode D1, wherein the cathode of the diode D1 is connected to the negative electrode HV "of the power input terminal 100, and the anode of the diode D1 is connected to one end of the electrical load 101 of the vehicle. As an example, the diode D1 may be a low current high voltage diode, the current of which D1 may be between 1A-2A, and the voltage may be 600V.
That is, in the embodiment of the present application, the low-current high-voltage diode D1 is used for power-up reverse connection prevention. When the power input terminal 100 is reversely connected, the electric load 101 cannot supply power reversely due to the unidirectional conduction characteristic of the diode D1; when the power input terminal 100 is powered up in the forward direction, the diode D1 is turned on, and the power input terminal 100 supplies power to the electrical load 101 normally, and the electrical load 101 may enter a standby state.
It is understood that the current specification of the diode D1 with small current and high voltage can be such that the standby current, which is the current flowing through the diode when the electric load 101 enters the standby state, is satisfied and the current safety margin is slightly released, i.e. the current specification of the diode D1 is required to be greater than or equal to (standby current + current safety margin), and the current safety margin can be a preset current value, for example, the current safety margin can be 0.2A. The voltage specification of the diode D1 with a low current and a high voltage may be that the withstand voltage is greater than the highest power supply voltage, and some voltage safety margin is left, that is, the voltage specification of the diode D1 needs to be greater than or equal to (the highest power supply voltage + the voltage safety margin), where the highest power supply voltage may be the maximum value of the instantaneous voltage input by the power input terminal 100, and the voltage safety margin may be a preset voltage value, for example, the voltage safety margin may be 20V.
As shown in fig. 3, the control switch 102 may be a relay RL, a contact of the relay RL is connected in parallel with the unidirectional conducting unit 103, and a coil of the relay RL is connected to the electric load 101 and is controlled by the electric load 101. As one example, the relay RL may be a low voltage high current relay.
It should be noted that, in the embodiment of the present application, a low-voltage large-current relay RL is connected in parallel to two ends of the diode D1 with a small current and a high voltage, for example, the voltage of the low-voltage large-current relay RL may be 500V, and the current thereof may be 30A. When the power input terminal 100 is reversely connected, the contact of the relay RL is opened, and at this time, the contact of the relay RL receives a reverse voltage, that is, a reverse input voltage of the power input terminal 100. After the power input end 100 is electrified in the forward direction, the contact of the relay RL bears the forward conduction voltage drop of the diode D1 and is less than 1V, for example, the forward conduction voltage drop of a silicon diode is 0.7V, and because the contact of the relay RL only bears the forward conduction voltage drop of the diode D1, no arc is pulled in the opening and closing processes of the contact. When the electric load 101 needs to be started, the coil of the relay RL is controlled by the electric load 101 to supply power, and the contact of the relay RL is closed. After the contact of the relay RL is closed, the energy loss is very small due to the very low contact resistance of the contact of the relay RL, in the milliohm level, and the voltage drop after conduction is very low, bypassing the diode D1. The contact of the relay RL is connected to the negative electrode of the power input terminal 100, and when power is normally supplied, the voltage difference between the contact and the coil of the relay RL is, for example, 12V for supplying power to the coil of the relay RL.
It can be understood that when the power input terminal 100 is reversely connected, the contact of the relay RL is subjected to the reverse voltage, and when the power input terminal 100 is electrified in the forward direction, the contact of the relay RL is subjected to the forward conduction voltage drop of the diode D1, so that the RL relay can be selected as a relay with a low voltage specification. In the relay with the same current specification, the volume of the low-voltage relay is smaller than 1/5 of the volume of the high-voltage relay, so that the space can be reduced limitedly.
The working principle of the power supply system of the vehicle according to the embodiment of the present invention will be described in detail with reference to fig. 3.
When the power input terminal 100 is reversely connected, due to the unidirectional conducting characteristic of the diode D1, no current passes through the part of the electric load 101, at this time, the coil of the relay RL does not receive the driving signal, and the contact of the relay RL1 is in a normally open state. At this time, the diode D1 can receive the voltage supplied from the power input terminal 100 in the reverse direction, and the contact of the relay RL can also receive the voltage supplied from the power input terminal 100 in the reverse direction.
When the power input terminal 100 is connected positively, the power input terminal 100 supplies power to the electric load 101 normally, the electric load 101 enters a standby state, and then the electric load 101 controls the relay RL as required. When the electric load 101 supplies a drive signal to the coil of the relay RL, the contact of the relay RL is closed. At this time, the relay RL can bear the forward conduction voltage drop of the diode D1, which is less than 1V.
It can be understood that the contact resistance of the contact of the relay RL is in milliohm level, so that the on voltage of the contact of the relay RL is much lower than the 0.7V forward conduction voltage drop of the diode, and therefore, most of the current flowing from the consumer 101 flows through the contact of the relay RL, but hardly flows through the diode D1, and the diode D1 corresponds to an auxiliary heat sink of the contact of the relay RL.
Therefore, the utility model discloses power supply system adopts the diode of high-pressure undercurrent, guarantees when the power is gone up, and the circuit can not be damaged in the transposition, and normal connection can start basic function, reduces the loss of preventing the transposition. Meanwhile, the relay adopts a low-voltage high-current relay, and the occupied volume can be reduced.
To sum up, according to the utility model discloses power supply system of vehicle that provides is through the negative pole of connecting power input end with the first end of unidirectional flux unit to through with control switch and unidirectional flux unit parallel connection, from this, can realize preventing reverse-connection, and the required voltage that bears of control switch is lower, and then can choose the control switch of low pressure specification for use, it is less to occupy the volume, realizes that the cost is lower.
Fig. 4 is a block schematic diagram of a vehicle 301 according to one embodiment of the present invention. As shown in fig. 4, the vehicle 301 has the power supply system 300 of the above embodiment.
It should be noted that the power supply system 300 of the vehicle may supply power to an air conditioner compressor controller of the vehicle 301, wherein the air conditioner compressor controller is used for driving a compressor in an air conditioner to operate.
Other configurations and functions of the vehicle according to the embodiment of the present invention are known to those skilled in the art, and are not described herein in detail in order to reduce redundancy.
To sum up, according to the utility model provides a vehicle, through the power supply system of vehicle, can realize preventing reverse-connection, occupy the volume less moreover, realize that the cost is lower.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (8)
1. A power supply system for a vehicle, characterized by comprising:
a power supply input terminal;
the first end of the unidirectional conduction unit is connected with the negative electrode of the power input end, the second end of the unidirectional conduction unit is connected with one end of an electric load of the vehicle, and the other end of the electric load is connected with the positive electrode of the power input end, wherein the unidirectional conduction unit is conducted when the power input end is positively connected and is cut off when the power input end is reversely connected;
and the control switch is connected with the unidirectional conduction unit in parallel, and is conducted when the power supply input end is positively connected.
2. The vehicle power supply system according to claim 1, wherein a control terminal of the control switch is connected to the electrical load, and the control switch is turned on under control of the electrical load.
3. The vehicle power supply system of claim 1, wherein the power input is connected to a high voltage DC power source, wherein,
when the positive pole of the power supply input end is connected with the positive pole of the high-voltage direct current power supply and the negative pole of the power supply input end is connected with the negative pole of the high-voltage direct current power supply, the power supply input end is connected positively;
when the positive pole of the power input end is connected with the negative pole of the high-voltage direct current power supply and the negative pole of the power input end is connected with the positive pole of the high-voltage direct current power supply, the power input ends are reversely connected.
4. The power supply system for vehicle according to claim 1, wherein said one-way conduction unit is a diode, wherein a cathode of said diode is connected to a cathode of said power input terminal, and an anode of said diode is connected to one end of an electrical load of said vehicle.
5. The vehicle power supply system according to claim 4, wherein the diode is a low-current high-voltage diode.
6. The power supply system for vehicle according to claim 1 or 2, wherein the control switch is a relay, a contact of the relay is connected in parallel with the unidirectional conducting unit, and a coil of the relay is connected to and controlled by the electric load.
7. The vehicle power supply system according to claim 6, wherein the relay is a low-voltage high-current relay.
8. A vehicle characterized by comprising a power supply system of a vehicle according to any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920703183.1U CN209888793U (en) | 2019-05-15 | 2019-05-15 | Power supply system for vehicle and vehicle with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920703183.1U CN209888793U (en) | 2019-05-15 | 2019-05-15 | Power supply system for vehicle and vehicle with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209888793U true CN209888793U (en) | 2020-01-03 |
Family
ID=69020832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920703183.1U Active CN209888793U (en) | 2019-05-15 | 2019-05-15 | Power supply system for vehicle and vehicle with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209888793U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112881937A (en) * | 2021-01-27 | 2021-06-01 | 阳光电源股份有限公司 | Safety detection device and method for direct-current power supply system |
| CN114301048A (en) * | 2021-03-31 | 2022-04-08 | 华为数字能源技术有限公司 | Prevent flowing backward circuit, direct current conversion circuit and direct current and fill electric pile |
-
2019
- 2019-05-15 CN CN201920703183.1U patent/CN209888793U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112881937A (en) * | 2021-01-27 | 2021-06-01 | 阳光电源股份有限公司 | Safety detection device and method for direct-current power supply system |
| CN112881937B (en) * | 2021-01-27 | 2022-07-12 | 阳光电源股份有限公司 | Safety detection device and method for direct-current power supply system |
| CN114301048A (en) * | 2021-03-31 | 2022-04-08 | 华为数字能源技术有限公司 | Prevent flowing backward circuit, direct current conversion circuit and direct current and fill electric pile |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11121570B2 (en) | Battery disconnecting device | |
| CN110601531B (en) | Power supply control circuit and vehicle-mounted air conditioner | |
| CN110224381B (en) | Photovoltaic inverter and photovoltaic power generation system thereof | |
| US20090212627A1 (en) | Car power source apparatus | |
| EP3399634B1 (en) | Isolated bidirectional dc-dc converter | |
| CN209888793U (en) | Power supply system for vehicle and vehicle with same | |
| US11165358B2 (en) | Switching control method for isolated bidirectional DC-DC converter | |
| JP2011504088A (en) | Booster circuit | |
| CN111630620A (en) | Switching device | |
| US7907431B2 (en) | Devices and methods for converting or buffering a voltage | |
| JPWO2020246415A5 (en) | ||
| EP2149988A2 (en) | Switching device, high power supply system and methods for switching high power | |
| DE102013205638A1 (en) | Vehicle electrical system | |
| CN111727487B (en) | Direct current circuit breaker | |
| CN111049383A (en) | Boost circuit of direct-hanging high-voltage power supply and soft start method | |
| EP3367405A1 (en) | Protective device | |
| JP4607199B2 (en) | Lifting magnet drive circuit | |
| CN112886640A (en) | Current limiting circuit and energy storage system | |
| CN109887802B (en) | Relay drive circuit | |
| JPWO2021005793A1 (en) | DC distribution board | |
| CN106253456B (en) | A kind of high-power emergency power supply static state is released control panel protection circuit | |
| JP2019009950A (en) | On-vehicle power supply circuit and on-vehicle power supply device | |
| CN114514681A (en) | DCDC converter | |
| WO2019163080A1 (en) | Voltage switching-type dc power supply | |
| KR20210007554A (en) | Power system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220808 Address after: 246008 floor 3, building B1, Binjiang New Area incubation center phase I, Chuangye Road, Anqing Economic and Technological Development Zone, Anhui Province Patentee after: Anqing Weiling Auto Parts Co.,Ltd. Patentee after: Anhui Weiling Auto Parts Co.,Ltd. Patentee after: GUANGDONG WELLING AUTO PARTS Co.,Ltd. Address before: 528311 Building No. 21 Gangqian Road, Industrial Park, Beijiao Town, Shunde District, Foshan City, Guangdong Province Patentee before: GUANGDONG WELLING AUTO PARTS Co.,Ltd. |
|
| TR01 | Transfer of patent right |