Complete vehicle power supply redundancy isolator and control method thereof

Abstract

The invention discloses a vehicle power redundancy isolator and a control method thereof, and the isolator comprises a main power supply input end which is connected to a vehicle DCDC converter; the standby power supply input end is connected to a vehicle storage battery; the main switch is connected in series between the main power supply input end and the load main line; the load switches are respectively connected in series with the plurality of load branches; the fuse is connected in series between the main switch and the load main circuit; and the controller is used for monitoring voltage values, current values and temperature values of the main switch and the load switch, and controlling the on-off of the main switch or the load switch according to a preset threshold value. According to the scheme, the current, voltage, temperature and other conditions of the main switch and the load switch can be continuously monitored in the vehicle power supply process, real-time power supply protection is conducted on the whole vehicle product according to the detection result, the stability and safety of normal power supply are ensured, the situation that the whole vehicle has great risks due to faults is avoided, and safety accidents are avoided. And the safety of vehicles and personnel is ensured.

Description

Technical Field

[0001] This invention relates to the field of vehicle power system technology, and in particular to a vehicle power redundancy isolator and its control method. Background Technology

[0002] With the rapid development of new energy vehicles, users have placed higher demands on the stability and safety of the vehicle's power supply system. They expect the system to be able to "recover seamlessly" even in the event of a power supply failure, without affecting the normal use of the vehicle. This is especially important during driving, as a sudden loss of power from the battery can lead to the failure of critical systems such as steering and braking, posing a significant safety risk.

[0003] Therefore, there is an urgent need for a more comprehensive power redundancy isolation scheme that can not only achieve seamless switching between primary and backup power supplies, but also provide independent intelligent monitoring and protection for each load, and ensure system safety even under extreme fault conditions. Summary of the Invention

[0004] In view of the above, the present invention aims to provide a vehicle power redundancy isolator and its control method to solve the aforementioned technical problems.

[0005] The technical solution adopted in this invention is as follows:

[0006] This invention provides a vehicle power redundancy isolator, comprising:

[0007] The main power input terminal is connected to the vehicle's DC-DC converter;

[0008] The backup power input terminal is connected to the vehicle battery.

[0009] The main switch is connected in series between the main power supply input terminal and the main load line.

[0010] Load switches are connected in series on multiple load branches;

[0011] The fuse is connected in series between the main switch and the main load circuit.

[0012] The controller is used to monitor the voltage, current and temperature values ​​of the main switch and the load switch, and control the on / off state of the main switch or the load switch according to preset thresholds.

[0013] Optionally, when the controller detects that the voltage, current, or temperature value of the main switch exceeds a first preset threshold, the main switch is disconnected.

[0014] When the controller detects that the main switch is in the preset normal operating condition, it closes the main switch.

[0015] Optionally, the first preset threshold includes:

[0016] The voltage value of the main switch is less than 9V or greater than 16V;

[0017] The current value of the main switch is greater than 350A;

[0018] The temperature of the main switch is greater than 150℃.

[0019] Optionally, if the current or temperature value of any load switch is detected to exceed the second preset threshold, the load switch shall be disconnected.

[0020] When the load switch is detected to be in the preset normal operating condition, the load switch is closed.

[0021] Optionally, the second preset threshold includes:

[0022] The load switch has a current rating greater than 70A;

[0023] Temperature value greater than 150℃.

[0024] Optionally, when the main switch is detected to be stuck and the current value of the main circuit exceeds the fuse blowing threshold, the fuse is blown to cut off the circuit.

[0025] The present invention also provides a control method for a vehicle power redundancy isolator, comprising:

[0026] The first parameter of the main switch is monitored, which includes the voltage, current and temperature of the main switch.

[0027] If any of the first parameters exceeds the first preset threshold, the main switch is disconnected.

[0028] Monitor the second parameter of each branch switch, which includes the current value and temperature value of the branch switch;

[0029] If any of the second parameters exceeds the second preset threshold, the corresponding branch switch is disconnected.

[0030] If the main switch is stuck and the current value of the main circuit exceeds the fuse threshold, the fuse will blow.

[0031] The above-described solution of the present invention has at least the following beneficial effects:

[0032] The above-mentioned solution of the present invention includes: a main power supply input terminal connected to the vehicle's DC-DC converter; a backup power supply input terminal connected to the vehicle's battery; a main switch connected in series between the main power supply input terminal and the main load circuit; load switches connected in series on multiple load branches; a fuse connected in series between the main switch and the main load circuit; and a controller for monitoring the voltage, current, and temperature values ​​of the main switch and load switches, and controlling the on / off state of the main switch or load switches according to preset thresholds. During vehicle power supply, the system continuously monitors the current, voltage, and temperature of the main switch and load switches, and provides real-time power supply protection for the entire vehicle based on the detection results. This ensures the stability and safety of normal power supply, avoids malfunctions that could pose a significant risk to the entire vehicle, prevents accidents, and protects the safety of the vehicle and its occupants. Attached Figure Description

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described below with reference to the accompanying drawings, wherein:

[0034] Figure 1 This is a schematic diagram of a vehicle power redundancy isolator provided in an embodiment of the present invention. Detailed Implementation

[0035] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0036] This invention proposes an embodiment of a vehicle power redundancy isolator, specifically, as follows: Figure 1 As shown, it includes:

[0037] The main power input terminal is connected to the vehicle's DC-DC converter 1;

[0038] The backup power input terminal is connected to the vehicle battery 5.

[0039] Main switch 2 is connected in series between the main power supply input terminal and the main load line;

[0040] The load switch 4 is connected in series with multiple load branches 6 respectively;

[0041] Fuse 3 is connected in series between the main switch and the main load circuit;

[0042] The controller is used to monitor the voltage, current and temperature values ​​of the main switch and the load switch 4, and to control the on / off state of the main switch or the load switch 4 according to preset thresholds.

[0043] In this embodiment, the DC-DC converter 1 and the vehicle battery 5 serve as a power supply and are connected to the power supply main circuit through the power supply input terminal; the main switch 2 and the fuse 3 are connected in series at the main power supply input terminal, and multiple load switches 4 are connected to different loads, such as advanced driver assistance systems (ADAS), electronic stability control systems (ESC), etc.; the main controller integrates voltage, current, and temperature detection circuits as well as switch drive circuits to collect data from each monitoring point in real time.

[0044] After the system is powered on, main switch 2 is closed by default. The controller continuously monitors the current, voltage, and temperature of main switch 2 to determine if these parameters are abnormal. The thresholds for this are: voltage value of main switch 2 less than 9V or greater than 16V; current value of main switch 2 greater than 350A; and temperature value of main switch 2 greater than 150℃. If everything is normal, the switch remains closed; if any parameter is abnormal, main switch 2 is immediately disconnected.

[0045] When main switch 2 is in the open state, the main controller continuously monitors its status and determines whether the main switch meets the recovery conditions (i.e., all abnormal parameters have returned to normal). If the conditions are met, main switch 2 is automatically closed; otherwise, it remains open.

[0046] After load switch 4 is closed, the controller continuously monitors the current and temperature of each load switch 4. It determines if any abnormality is detected, with thresholds for current exceeding 70A and temperature exceeding 150℃. If all load switches 4 are functioning normally, they remain closed; if any load switch 4 malfunctions, the corresponding load switch 4 is disconnected.

[0047] When load switch 4 is in the open state, it is determined whether the recovery conditions (current and temperature return to normal) are met. If they are met, load switch 4 is automatically closed; otherwise, it remains open.

[0048] After the system is powered on, fuse 3 is initially in a normal state. The controller continuously monitors the state of main switch 2 and the current in the main power supply input circuit to determine whether main switch 2 is stuck (for example, the controller has issued a command to disconnect main switch 2, but the circuit current has not dropped to zero after 1 second) and whether the main power supply input circuit exceeds the fuse blowing threshold. If both conditions are met, fuse 3 blows, completely cutting off the main power supply input circuit and ensuring safety.

[0049] This embodiment further enhances the fault information reporting function. When the controller determines that the main switch 2 or any load switch 4 has been disconnected due to a fault, it generates a corresponding diagnostic fault code (DTC) and sends it to the vehicle-mounted TBOX via the CAN bus. The TBOX then uploads this fault information to the cloud server. Back-end technicians can use this information to analyze fault modes, frequency of occurrence, etc., providing data support for product quality improvement and fault early warning.

[0050] Embodiments of the present invention also provide a control method for a vehicle power redundancy isolator, comprising:

[0051] The first parameter of the main switch is monitored, which includes the voltage, current and temperature of the main switch.

[0052] If any of the first parameters exceeds the first preset threshold, the main switch is disconnected.

[0053] Monitor the second parameter of each branch switch, which includes the current value and temperature value of the branch switch;

[0054] If any of the second parameters exceeds the second preset threshold, the corresponding branch switch is disconnected.

[0055] If the main switch is stuck and the current value of the main circuit exceeds the fuse threshold, the fuse will blow.

[0056] In summary, the vehicle power redundancy isolator and its control method according to the above embodiments of the present invention can continuously monitor the current, voltage, temperature and other conditions of the main switch and load switch during vehicle power supply. Based on the detection results, the system can provide real-time power supply protection for the vehicle products, ensuring the stability and safety of normal power supply, avoiding malfunctions that could pose a great risk to the vehicle, preventing safety accidents, and protecting the safety of the vehicle and its personnel.

[0057] In this invention, when directional terms are mentioned, they are relative concepts based on the embodiments. Furthermore, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent the existence of A alone, A and B simultaneously, or B alone. A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects have an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, and c can represent: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, and c can be single or multiple.

[0058] The above description of the structure, features, and effects of the present invention is based on the embodiments shown in the figures. However, the above are only preferred embodiments of the present invention. It should be noted that the technical features involved in the above embodiments and their preferred methods can be reasonably combined and matched by those skilled in the art to form a variety of equivalent solutions without departing from or changing the design concept and technical effects of the present invention. Therefore, the present invention is not limited to the scope of implementation shown in the figures. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments, that do not exceed the spirit covered by the specification and figures, should be within the protection scope of the present invention.

Claims

1. A vehicle power redundancy isolator, characterized in that, include: The main power input terminal is connected to the vehicle DC-DC converter (1). The backup power input terminal is connected to the vehicle battery (5). The main switch (2) is connected in series between the main power supply input terminal and the load main line; The load switch (4) is connected in series with multiple load branches (6); The fuse (3) is connected in series between the main switch and the main load circuit; The controller is used to monitor the voltage, current and temperature values ​​of the main switch and the load switch (4), and to control the opening and closing of the main switch or the load switch (4) according to the preset threshold.

2. The vehicle power redundancy isolator according to claim 1, characterized in that, When the controller detects that the voltage, current or temperature value of the main switch (2) exceeds the first preset threshold, the main switch (2) is disconnected. When the controller detects that the main switch (2) is in the preset normal working condition, it closes the main switch (2).

3. The vehicle power redundancy isolator according to claim 2, characterized in that, The first preset threshold includes: The voltage value of the main switch (2) is less than 9V or greater than 16V; The current value of the main switch (2) is greater than 350A; The temperature value of the main switch (2) is greater than 150℃.

4. The vehicle power redundancy isolator according to claim 1, characterized in that, When the current value or temperature value of any load switch (4) exceeds the second preset threshold, the load switch (4) is disconnected. When the load switch (4) is detected to be in the preset normal working condition, the load switch (4) is closed.

5. The vehicle power redundancy isolator according to claim 4, characterized in that, The second preset threshold includes: The current value of the load switch (4) is greater than 70A; Temperature value greater than 150℃.

6. The vehicle power redundancy isolator according to claim 4, characterized in that, When the main switch is detected to be stuck and the current value of the main circuit exceeds the fuse blowing threshold, the fuse is blown to cut off the circuit.

7. A control method for a vehicle power redundancy isolator, characterized in that, include: The first parameter of the main switch is monitored, which includes the voltage, current and temperature of the main switch. If any of the first parameters exceeds the first preset threshold, the main switch is disconnected. Monitor the second parameter of each branch switch, which includes the current value and temperature value of the branch switch; If any of the second parameters exceeds the second preset threshold, the corresponding branch switch is disconnected. If the main switch is stuck and the current value of the main circuit exceeds the fuse threshold, the fuse will blow.

Images