WO2020093626A1

WO2020093626A1 - Power supply system and vehicle

Info

Publication number: WO2020093626A1
Application number: PCT/CN2019/075930
Authority: WO
Inventors: 夏斌
Original assignee: 北京宝沃汽车有限公司
Priority date: 2018-11-06
Filing date: 2019-02-22
Publication date: 2020-05-14
Also published as: CN111137231A

Abstract

The present application relates to a power supply system and a vehicle. The system comprises a high-voltage power supply module, a low-voltage power supply module, and a controller; the high-voltage power supply module is configured to be connected to vehicle electrical devices of a vehicle to form a first power supply circuit; the low-voltage power supply module is configured to be connected to the starter of the vehicle to form a second power supply circuit; the first power supply circuit is connected to the second power supply circuit by means of the controller; the controller is used for connecting the first power supply circuit to the second power supply circuit or disconnecting the first power supply circuit from the second power supply circuit. By means of the technical solution of the present application, a power supply circuit for vehicle electrical devices can be connected to or isolated from a power supply circuit for the starter; when the power supply circuit for the vehicle electrical devices is disconnected from the power supply circuit for the starter, and the engine needs to be started by the starter during traveling of the vehicle, the high-voltage power supply module supplies power to the vehicle electrical devices, and the low-voltage power supply module supplies power to the starter, thereby ensuring that the starter can start normally and the voltage of the vehicle electrical devices is stable, and reducing safety risks.

Description

Power supply system and vehicle

Cross-reference of related applications

This application claims the priority of China Patent Application No. 201811315253.2 filed on November 06, 2018, and the contents of this application are incorporated herein by reference in its entirety.

Technical field

The present disclosure relates to the technical field of vehicles, and in particular, to a power supply system and a vehicle.

Background technique

At present, a single power supply module is usually used on the market to supply power to the vehicle's electrical appliances. However, for hybrid models, when they need to start the engine during driving, the power supply module also needs to supply power to the starter used to drive the engine, which will cause the voltage of the vehicle electrical appliances to drop, which in turn will cause the vehicle to be used. The electrical appliance fails due to the instantaneous low voltage, which affects the safety of driving.

Summary of the invention

To overcome the problems in the prior art, the present disclosure provides a power supply system and a vehicle.

In order to achieve the above object, the present disclosure provides a power supply system, which is applied to a vehicle, and the system includes: a high-voltage power supply module, a low-voltage power supply module, and a controller;

The high-voltage power supply module is used to connect with the vehicle electrical appliances of the vehicle to form a first power supply circuit;

The low-voltage power supply module is used to connect with the starter of the vehicle to form a second power supply circuit;

The first power supply circuit is connected to the second power supply circuit through the controller, and the controller is used to turn on or off the connection between the first power supply circuit and the second power supply circuit.

Optionally, the controller is used to:

When receiving the start signal to the starter, disconnect the connection between the first power supply circuit and the second power supply circuit to disconnect the power supply of the low-voltage power supply module to the vehicle electrical appliances Power supply circuit.

Optionally, the controller is used to:

Detect the working state of the high-voltage power supply module;

When the working state is abnormal, the connection between the first power supply circuit and the second power supply circuit is turned on to turn on the power supply circuit that supplies power to the vehicle electrical appliance from the low-voltage power supply module.

Optionally, the controller is also used to:

Obtaining the target power consumption of the vehicle electrical appliances;

When the target power consumption is greater than or equal to a first preset threshold, the connection between the first power supply circuit and the second power supply circuit is turned on to turn on the low-voltage power supply module to the vehicle Power supply circuit powered by electrical appliances.

Optionally, the controller is also used to:

Obtaining the target power consumption of the vehicle electrical appliances;

Optionally, the system further includes:

The power detection module is respectively connected to the low-voltage power supply module and the controller, and is used to obtain the remaining power of the low-voltage power supply module in real time;

The controller is further configured to, when the target power consumption is less than the first preset threshold and the acquired remaining power is greater than or equal to a second preset threshold, disconnect the first power supply circuit and the A connection between the second power supply circuits to disconnect the power supply circuit that supplies the low-voltage power supply module to the vehicle electrical appliance and the power supply circuit that supplies the high-voltage power supply module to the low-voltage power supply module.

Optionally, the controller is also used to:

When the target power consumption is less than the first preset threshold and the acquired remaining power is less than the third preset threshold, turn on the connection between the first power supply circuit and the second power supply circuit to The power supply circuit that supplies power to the low-voltage power supply module from the high-voltage power supply module is turned on.

Optionally, the system further includes:

The switch module is respectively connected to the airbag controller of the vehicle, the low-voltage power supply module and the starter, and is used to switch the low-voltage when receiving an instruction signal sent by the airbag controller indicating that the vehicle has collided. The power supply circuit between the power supply module and the starter is disconnected.

Optionally, the system further includes a jump start interface provided between the switch module and the starter, the jump start interface is configured to turn on the switch module and the starter. Power supply circuit;

The jump start interface is provided in the engine compartment of the vehicle;

The low-voltage power supply module is provided in the middle of the body of the vehicle or in the luggage compartment.

Optionally, the high-voltage power supply module includes a high-voltage power supply and a voltage conversion sub-module;

The voltage conversion sub-module is respectively connected to the high-voltage power supply and the vehicle electrical appliance, and is used to convert the output voltage of the high-voltage power supply to a preset voltage and output it to the vehicle electrical appliance.

The present disclosure also provides a vehicle, including a vehicle electrical appliance, a starter, and a power supply system provided by the present disclosure.

Through the above technical solutions, at least the following effects can be achieved:

The high-voltage power supply module is used to connect with the vehicle's electrical appliances to form a first power supply circuit; the low-voltage power supply module is used to connect to the vehicle's starter to form a second power supply circuit; the first power supply circuit is connected to the second power supply circuit through the controller Connection, the controller is used to turn on or off the connection between the first power supply circuit and the second power supply circuit, when the controller turns on the connection between the first power supply circuit and the second power supply circuit, the high-voltage power supply module and the low-voltage power supply The module can jointly supply power for the vehicle's electrical appliances; when the controller disconnects the first power supply circuit and the second power supply circuit, the first power supply circuit and the second power supply circuit are separated, so that during the operation of the vehicle When the starter is needed to start the engine, the high-voltage power supply module supplies power to the vehicle electrical appliances, and the low-voltage power supply module supplies power to the starter, thus ensuring that the starter can start normally and the voltage of the vehicle electrical appliances is stable. Reduced security risks.

Other features and advantages of the present disclosure will be described in detail in the detailed description section that follows.

BRIEF DESCRIPTION

The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification, together with the following specific embodiments to explain the present disclosure, but do not constitute a limitation of the present disclosure. In the drawings:

FIG. 1 is a block diagram of a power supply system according to an exemplary embodiment of the present disclosure;

2 is a block diagram of a power supply system according to another exemplary embodiment of the present disclosure;

3 is a schematic structural diagram of a power supply system according to an exemplary embodiment of the present disclosure;

Fig. 4 is a schematic structural diagram of a power supply system according to another exemplary embodiment of the present disclosure.

detailed description

The specific embodiments of the present disclosure will be described in detail below with reference to the drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

In the present disclosure, the terms "first", "second", etc. in the specification and claims of the present disclosure and the drawings are used to distinguish similar objects, and do not have to be understood as a specific order or sequential order.

Fig. 1 is a block diagram of a power supply system according to an exemplary embodiment of the present disclosure. As shown in FIG. 1, the system 100 can be applied to a vehicle 200, which includes a vehicle electrical appliance 201 and a starter 202, wherein the vehicle electrical appliance 201 includes a high and low speed fan, an instrument panel, a car lamp, etc. (Not shown), the starter 202 is used to start the engine (not shown in the figure).

The system 100 may include a high-voltage power supply module 101, a controller 102, and a low-voltage power supply module 103. The high-voltage power supply module 101 is connected to the vehicle electrical appliance 201 of the vehicle 200 to form a first power supply circuit; the low-voltage power supply module 103 is connected to the vehicle starter 202 to form a second power supply circuit; the first power supply circuit is connected to the second through the controller 102 The power supply circuit is connected, and the controller 102 is used to turn on or off the connection between the first power supply circuit and the second power supply circuit.

When the controller 102 turns on the connection between the first power supply circuit and the second power supply circuit, the high-voltage power supply module 101 and the low-voltage power supply module 103 jointly supply power to the vehicle electrical appliance 201 and the starter 202; when the controller 102 disconnects the first When a power supply circuit is connected to the second power supply circuit, the high-voltage power supply module 101 supplies power to the vehicle electrical appliance 201, and the low-voltage power supply module 103 supplies power to the starter 202. In this case, the vehicle electrical appliance 201 supplies power The circuit and the power supply circuit of the starter 202 are separated and independent, so as to ensure that the starter 202 can be normally started, and stabilize the voltage of the electrical appliance 201 for the entire vehicle, reducing potential safety hazards.

In a possible implementation, the controller 102 may be used to disconnect the connection between the first power supply circuit and the second power supply circuit when receiving the start signal to the starter 202 to disconnect the low-voltage power supply module 103 A power supply circuit powered by the electric appliance 201 for the entire vehicle. The start signal may be a signal that is triggered when the vehicle receives a start request command for the engine.

In another embodiment of the present disclosure, the controller 102 can also detect the working state of the high-voltage power supply module 101, and when the working state of the high-voltage power supply module 101 is abnormal, turn on between the first power supply circuit and the second power supply circuit To connect the low-voltage power supply module 103 to the power supply circuit of the vehicle electrical appliance 201. At this time, the low-voltage power supply module 103 supplies power to the vehicle electrical appliance 201 to ensure that the vehicle electrical appliance 201 can work normally.

In another embodiment of the present disclosure, the controller 102 can also obtain the target power consumption of the vehicle electrical appliance 201. When the target power consumption of the vehicle electrical appliance 201 is greater than or equal to the first preset threshold, only relying on high voltage The power supply module 101 cannot meet the power demand of the vehicle electrical appliance 201, so the controller 102 can turn on the connection between the first power supply circuit and the second power supply circuit to turn on the low voltage power supply module 103 to supply power to the vehicle electrical appliance 201 Power supply circuit. At this time, the high-voltage power supply module 101 and the low-voltage power supply module 103 jointly supply power to the vehicle electrical appliance 201 to meet the power demand of the vehicle electrical appliance 201.

In another embodiment of the present disclosure, as shown in FIG. 2, the power supply system 100 may further include a power detection module 104. The power detection module 104 is respectively connected to the controller 102 and the low-voltage power supply module 103, and can be used to obtain the remaining power of the low-voltage power supply module 103 in real time.

When the target power consumption is less than the first preset threshold, considering the situation that the low-voltage power supply module 103 needs to be charged when the remaining power is insufficient, accordingly, if the obtained low-voltage power supply module 103 has a remaining power greater than or equal to the second preset At the threshold, it can be considered that the low-voltage power supply module 103 does not need to be charged. At this time, the controller 102 can disconnect the connection between the first power supply circuit and the second power supply circuit to disconnect the power supply from the voltage power supply module 103 to the vehicle electrical appliance 201 The circuit and the power supply circuit that the high-voltage power supply module 101 supplies to the low-voltage power supply module 102. At this time, the high-voltage power supply module 101 supplies power to the vehicle electrical appliance 201; if the remaining power of the obtained low-voltage power supply module 103 is less than the third preset threshold, it may be considered that the low-voltage power supply module 103 needs to be charged, and the controller 102 may The connection between the first power supply circuit and the second power supply circuit is turned on to turn on the power supply circuit that the high-voltage power supply module 101 supplies to the low-voltage power supply module 103. At this time, the high-voltage power supply module 101 supplies power to the vehicle electrical appliance 201, and at the same time, the high-voltage power supply module 101 charges the low-voltage power supply module 103.

It is worth noting that in the power supply system shown in the above embodiment of the present disclosure, the low-voltage power supply module 103 can be installed in different positions of the vehicle, for example, it can be installed in the engine compartment, luggage compartment, and middle body of the vehicle (such as the middle of the cockpit) .

In the case where the low-voltage power supply module 103 is installed in the middle of the luggage compartment or the cockpit, there is a risk of crushing when the vehicle collides, which may easily cause a short-circuit and fire in the power supply circuit between the low-voltage power supply module 103 and the starter 202. As shown in FIG. 2, the power supply system 100 may further include a switch module 105. Among them, the switch module 105 is respectively connected to the vehicle's airbag controller (not shown in the figure), the low-voltage power supply module 103 and the starter 202, and can be used to receive an instruction signal from the airbag controller indicating that the vehicle has collided, The power supply circuit between the low-voltage power supply module 103 and the starter 202 is disconnected. At this time, the high-voltage power supply module 101 and the low-voltage power supply module 103 can normally supply power to the vehicle electrical appliance 201 to ensure that the vehicle electrical appliance 201 works normally, for example, the door of the vehicle can be unlocked normally, and the TBOX can normally alarm.

In addition, the low-voltage power supply module 103 is installed in the middle of the vehicle body or the luggage compartment. Considering that the low-voltage power supply module 103 needs to be connected to an external power supply to ensure that the starter 202 can start normally, as shown in FIG. 2, the power supply system 100 also The jump start interface 106 may be included. The straddle start interface 106 is configured to turn on the power supply circuit between the switch module 105 and the starter 202, and the jump start interface 106 is provided in the engine compartment of the vehicle 200.

When the low-voltage power supply module 103 needs to be connected to the external power supply, the positive line of the external power supply can be connected to the jumper start interface 106 and the negative line of the external power supply can be grounded to power the starter 202 so that the starter 202 can work normally Starting the engine eliminates the need for the user to open the middle of the body of the vehicle 200 or the luggage compartment to find the low-voltage power supply module 103, which increases convenience.

3 and 4 are schematic structural diagrams of a power supply system according to an exemplary embodiment of the present disclosure, where the system 100 can be applied to a vehicle 200. As shown in FIGS. 3 and 4, in this embodiment, the system 100 includes a high-voltage power supply module 101, a controller 102, a low-voltage power supply module 103, a power detection module 104, a switch module 105, and a jump-start interface 106.

The controller 102 may include a switch 121, one end of which is connected to the high-voltage power supply module 101 and the vehicle electrical appliance 201, and the other end is connected to the low-voltage power supply module 103 and the starter 202, respectively.

The low-voltage power supply module 103 may include a low-voltage power supply 131 (for example, a low-voltage battery), which may be installed in different positions of the vehicle as needed, for example, may be installed in the engine compartment of the vehicle (as shown in FIG. 3), or may be installed in the luggage of the vehicle The middle of the cabin or cockpit (as shown in Figure 4).

The high-voltage power supply module 101 may include a high-voltage power supply 111 (such as a high-voltage battery) and a voltage conversion sub-module 112, wherein the voltage conversion sub-module 112 is connected to the high-voltage power supply 111 and the vehicle electrical appliance 201 respectively, and may be used to connect the high-voltage power supply 111 The output voltage is converted into a preset voltage and output to the vehicle electrical appliance 201. For example, the voltage conversion sub-module 112 may include a high-voltage DC-DC converter and a low-voltage DC-DC converter, wherein the high-voltage DC-DC converter may convert the output voltage of the high-voltage power supply 111 to a voltage of 12V and output the low-voltage DC -The DC converter can convert the 12V voltage output by the high-voltage DC-DC converter into the voltage required by different devices in the vehicle electrical appliances, and then supply power to each device.

In order to protect the vehicle electrical appliances, the high-voltage power supply module 101 may further include a plurality of fuse boxes respectively connected to the vehicle electrical appliances 201. For example, the high-voltage power supply module 101 may include an engine fuse box (EJB) 113 and an instrument cross-beam fuse box (IPJB) 114. In addition, as shown in FIG. 4, for the case where the low-voltage power supply module 103 is provided in the middle of the luggage compartment or the cockpit of the vehicle, the high-voltage power supply module 101 may further include a rear compartment fuse box (RJB) 115 and a power distribution box for distributing electricity 116, wherein the power distribution box 116 may be a primary fuse box, which is connected to the controller 102, the engine fuse box (EJB) 113, and the rear compartment fuse box (RJB) 115, respectively.

The power detection module 104 may include a battery sensor (IBS) 141.

The switch module 105 may include a crash power switch (SBK) 151, which is controlled by an airbag controller (SDM). The crash power switch 151 has one end connected to the low-voltage power supply 131 of the vehicle and the other end connected to the starter 202 via a jump start interface 106 . When the vehicle collides, the controller 102 receives the collision signal sent by the airbag controller, and the switch module 105 is powered off, which can protect the starter circuit from short circuit and fire, and the switch 121 is connected to the low voltage power supply 131 and the vehicle electrical appliance 201 The power supply circuit in between ensures that the vehicle's other electrical appliances are constantly powered, the four doors of the vehicle can be unlocked normally, and the on-board T-BOX can normally alarm.

In this embodiment, when there is no need to start the vehicle's starter 202, the switch 121 is in a closed state, the current output by the low-voltage power supply 131 flows to the vehicle electrical appliances through each fuse box, and the current output by the high-voltage power supply 111 sequentially passes through the voltage converter The module 112 and each fuse box then flow to the vehicle electrical appliance. At this time, the high-voltage power supply 111 and the low-voltage power supply 131 supply power to the vehicle electrical appliance 201 together.

During the starting process of the starter, when the start signal to the starter is received, the trigger switch 121 is turned off, the power supply circuit between the low-voltage power supply 131 and the vehicle electrical appliance 201 is disconnected, and the low-voltage power supply 131 supplies power to the starter. The current output by the high-voltage power supply 111 passes through the voltage conversion sub-module 112 and each fuse box to flow to the vehicle electrical appliance 201 in order to supply power to the vehicle electrical appliance 201. At this time, the power supply circuit of the vehicle electrical appliance and the starter power supply circuit are Separation is independent, so as to ensure that the starter can start normally, at the same time, it stabilizes the voltage of the vehicle electrical appliances and reduces potential safety hazards.

When an abnormality is detected in the voltage conversion sub-module 112, the trigger switch 121 is closed to turn on the power supply circuit between the low-voltage power supply 131 and the vehicle electrical appliance 201. At this time, the current output from the low-voltage power supply 131 flows to the starter on the one hand Start the starter, on the other hand, flow through the fuses to the vehicle electrical appliance 201 to supply power to the vehicle electrical appliance 201 to ensure that the vehicle electrical appliance can work normally.

In addition, during the start-up process of the starter, as shown in FIG. 4, if the vehicle does not collide, the collision power-off switch (SBK) 151 is closed, and at this time, the power supply circuit between the low-voltage power supply 131 and the starter 201 is turned on, The starter can start normally; if the vehicle collides, the collision switch (SBK) 151 is triggered to be disconnected. At this time, the power supply circuit that the low-voltage power supply 131 supplies to the starter 201 is disconnected, and the high-voltage power supply 111 supplies power to the vehicle electrical appliance 201 The power supply circuit is turned on, while ensuring the normal operation of the electrical appliance 201 for the entire vehicle, it can avoid the short circuit and fire of the power supply circuit of the starter caused by the vehicle collision.

For the power supply process of the vehicle electrical appliance 201, when it is detected that the target electric quantity of the vehicle electrical appliance 201 is greater than or equal to the first preset threshold, the switch 121 is closed, and the low-voltage power supply 131 supplies power to the vehicle electrical appliance 201. The low-voltage power supply 131 and the high-voltage power supply 111 together supply power to the vehicle electrical appliances to meet the power demand of the vehicle electrical appliances; when it is detected that the target power of the vehicle electrical appliances is less than the first preset threshold, the battery sensor (IBS ) 141 can detect the remaining power of the low-voltage power supply 131 in real time. If the obtained remaining power is greater than or equal to the second preset threshold, the switch 121 is turned off. At this time, the power supply circuit that the high-voltage power supply 111 supplies to the low-voltage power supply 131 is disconnected. The low-voltage power supply 131 supplies power to the vehicle's electrical appliances; if the obtained remaining power is less than the second preset threshold, the switch 121 is closed. At this time, the power supply circuit that the high-voltage power supply 111 supplies to the low-voltage power supply 131 is turned on, and the high-voltage power supply 111 is The vehicle electrical appliance 201 and the low-voltage power supply 131 supply power.

Correspondingly, the present disclosure also provides a vehicle, including a vehicle electrical appliance, a starter, and the power supply system described in any one of the foregoing embodiments, and the power supply system will not be repeated here.

The preferred embodiments of the present disclosure have been described in detail above with reference to the drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure. These simple modifications all fall within the protection scope of the present disclosure.

In addition, it should be noted that the specific technical features described in the above specific embodiments can be combined in any suitable manner without contradictions. In order to avoid unnecessary repetition, the present disclosure The combination method will not be explained separately.

In addition, various combinations of various embodiments of the present disclosure can also be arbitrarily combined, as long as it does not violate the idea of the present disclosure, it should also be regarded as what is disclosed in the present disclosure.

Claims

A power supply system characterized by being applied to a vehicle, the system includes: a high-voltage power supply module, a low-voltage power supply module and a controller;

The high-voltage power supply module is used to connect with the vehicle electrical appliances of the vehicle to form a first power supply circuit;

The low-voltage power supply module is used to connect with the starter of the vehicle to form a second power supply circuit;

The first power supply circuit is connected to the second power supply circuit through the controller, and the controller is used to turn on or off the connection between the first power supply circuit and the second power supply circuit.
The system of claim 1, wherein the controller is used to:

When receiving the start signal to the starter, disconnect the connection between the first power supply circuit and the second power supply circuit to disconnect the power supply of the low-voltage power supply module to the vehicle electrical appliances Power supply circuit.
The system of claim 1, wherein the controller is used to:

Detect the working state of the high-voltage power supply module;

When the working state is abnormal, the connection between the first power supply circuit and the second power supply circuit is turned on to turn on the power supply circuit that supplies power to the vehicle electrical appliance from the low-voltage power supply module.
The system of claim 1, wherein the controller is used to:

Obtaining the target power consumption of the vehicle electrical appliances;

When the target power consumption is greater than or equal to a first preset threshold, the connection between the first power supply circuit and the second power supply circuit is turned on to turn on the low-voltage power supply module to the vehicle Power supply circuit powered by electrical appliances.
The system according to claim 4, wherein the system further comprises:

The power detection module is respectively connected to the low-voltage power supply module and the controller, and is used to obtain the remaining power of the low-voltage power supply module in real time;

The controller is further configured to, when the target power consumption is less than the first preset threshold and the acquired remaining power is greater than or equal to a second preset threshold, disconnect the first power supply circuit and the A connection between the second power supply circuits to disconnect the power supply circuit that supplies the low-voltage power supply module to the vehicle electrical appliance and the power supply circuit that supplies the high-voltage power supply module to the low-voltage power supply module.
The system of claim 5, wherein the controller is used to:

When the target power consumption is less than the first preset threshold and the acquired remaining power is less than the third preset threshold, turn on the connection between the first power supply circuit and the second power supply circuit to The power supply circuit that supplies power to the low-voltage power supply module from the high-voltage power supply module is turned on.
The system of claim 1, wherein the system further comprises:

The switch module is respectively connected to the airbag controller of the vehicle, the low-voltage power supply module and the starter, and is used to switch the low-voltage when receiving an instruction signal sent by the airbag controller indicating that the vehicle has a collision. The power supply circuit between the power supply module and the starter is disconnected.
The system according to claim 7, wherein the system further comprises a jumper start interface provided between the switch module and the starter, the jumper start interface is configured to turn on the A power supply circuit between the switch module and the starter;

The jump start interface is provided in the engine compartment of the vehicle;

The low-voltage power supply module is provided in the middle of the body of the vehicle or in the luggage compartment.
The system according to any one of claims 1 to 8, wherein the high-voltage power supply module includes a high-voltage power supply and a voltage conversion sub-module;

The voltage conversion sub-module is respectively connected to the high-voltage power supply and the vehicle electrical appliance, and is used to convert the output voltage of the high-voltage power supply to a preset voltage and output it to the vehicle electrical appliance.
A vehicle characterized by comprising a vehicle electrical appliance, a starter, and the power supply system according to any one of claims 1 to 9.