Power taking system of trailer brake synchronizer and vehicle

Abstract

The utility model provides an electricity taking system of a trailer brake synchronizer and a vehicle. According to the scheme, a convenient trailer brake synchronizer connecting mode is provided for a tractor. Specifically, according to the scheme, an electricity taking port specially matched with a trailer brake synchronizer is reserved in a tractor, and the electricity taking port comprises two pins with key functions, namely a power supply pin and a control pin. The power supply pin is used for being connected with a storage battery of a tractor and providing power support for a trailer brake synchronizer. And the control pin is used for accessing a brake signal of the tractor so as to control a brake synchronizer of the trailer, so that the brake operation of the trailer is completed. For a user, all necessary connections can be completed only by inserting the trailer brake synchronizer into the reserved power taking port, and complicated wiring operation of a power supply circuit and a brake signal circuit is not needed. By means of the design, the installation process is simplified, the use threshold is lowered, and potential safety hazards caused by wiring errors are effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle control technical field especially relates to a take electricity system of trailer brake synchronizer and vehicle. BACKGROUND

[0002] ‌In the trailer application scene, the brake synchronization performance of the towing vehicle and the trailer is the key factor of driving safety. At present, most of the vehicles on the market do not include trailer brake control function into the standard configuration when they are factory-finished, and users need to install trailer brake synchronizer to realize the brake synchronization function. The working principle of trailer brake synchronizer is to realize synchronous braking of the trailer by real-time receiving the brake signal of the towing vehicle.

[0003] In the installation process of the trailer brake synchronizer, the user needs to complete the wiring operation of the power supply line and the brake signal line. Such operation needs to have a deep understanding of the vehicle electrical system, and ordinary users are easy to cause equipment failure due to wiring error, thereby causing safety problems. UTILITY MODEL CONTENTS

[0004] In view of the above problems, the utility model provides a take electricity system of trailer brake synchronizer and vehicle which overcomes the above problems or at least partially solves the above problems, and the technical scheme is as follows:

[0005] A take electricity system of trailer brake synchronizer, comprising:

[0006] A power taking port provided on a towing vehicle, the power taking port is adapted to a trailer brake synchronizer and is provided with:

[0007] A power supply pin, the power supply pin is connected with a storage battery of the towing vehicle to form a power supply circuit, in the case that the trailer brake synchronizer is connected to the power taking port, the storage battery supplies power to the trailer brake synchronizer through the power supply pin;

[0008] A control pin, the control pin is connected to a brake signal of the towing vehicle, in the case that the trailer brake synchronizer is connected to the power taking port, the brake signal controls the trailer brake synchronizer to brake the trailer through the control pin.

[0009] Optionally, the take electricity system further comprises:

[0010] A power management controller, the power management controller is connected to a power supply state signal of the towing vehicle, in the case that the trailer brake synchronizer is connected to the power taking port, the power management controller controls the power supply circuit on and off based on the power supply state signal.

[0011] Optionally, the power state signal comprises at least one of a power on signal, a power off signal and a low power signal; wherein, when the trailer brake synchronizer accesses the power taking port and the power state signal accessed by the power management controller is the power on signal, the power management controller controls the power supply circuit to be turned on; when the trailer brake synchronizer accesses the power taking port and the power state signal accessed by the power management controller is the power off signal or the low power signal, the power management controller controls the power supply circuit to be blocked.

[0012] Optionally, the power supply circuit is provided with a relay, and the power management controller is connected with the relay; when the trailer brake synchronizer accesses the power taking port, the power management controller controls the relay to turn on or off the power supply circuit based on the power state signal.

[0013] Optionally, the control pin comprises:

[0014] a signal collection pin connected with one of a brake pedal switch, a brake indicator positive electrode and an electronic control unit of the towing vehicle to access the brake signal; a signal output pin for pre-processing the brake signal collected by the signal collection pin and outputting the pre-processed brake signal to the trailer brake synchronizer to brake the trailer when the trailer brake synchronizer accesses the power taking port.

[0015] Optionally, the power taking port is a standard interface, and the signal output pin is a reserved pin of the standard interface.

[0016] Optionally, the power supply pin comprises: a first power supply pin connected with a positive electrode of the storage battery; and a second power supply pin connected with a negative electrode of the storage battery or simultaneously connected with a ground wire and the negative electrode of the storage battery; wherein, when the trailer brake synchronizer accesses the power taking port, the trailer brake synchronizer accesses the power supply circuit through the first power supply pin and the second power supply pin.

[0017] Optionally, a power supply fuse is arranged on the passage of the power supply circuit, and the power supply fuse is fused when the current value of the power supply circuit reaches a preset threshold value, so as to block the power supply circuit.

[0018] Optionally, the power taking port is arranged at one of the following positions:

[0019] a bottom of a storage box of a co-driver of the towing vehicle;

[0020] an inside of the storage box of the co-driver of the towing vehicle.

[0021] on the central console of the towing vehicle.

[0022] A vehicle comprising the power supply system of the trailer brake synchronizer.

[0023] The utility model aims at providing a convenient trailer brake synchronizer connection mode for a towing vehicle. Specifically, the scheme reserves a power supply port specially adapted to the trailer brake synchronizer on the towing vehicle, and the power supply port includes two key functional pins: a power supply pin and a control pin. The power supply pin is used to access the battery of the towing vehicle to provide power support for the trailer brake synchronizer; the control pin is used to access the brake signal of the towing vehicle to realize the control of the trailer brake synchronizer, thereby completing the trailer braking operation. For users, all necessary connections can be completed by simply inserting the trailer brake synchronizer into the reserved power supply port, without the need for complex power supply line and brake signal line wiring operations. This design not only simplifies the installation process and reduces the use threshold, but also effectively avoids safety hazards caused by wiring errors.

[0024] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the present disclosure, which can be implemented according to the content of the specification, and in order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation of the utility model is described below. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only some embodiments described in the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0026] Figure 1 It is a first structure diagram of the power supply system of the trailer brake synchronizer of the utility model embodiment.

[0027] Figure 2 It is a second structure diagram of the power supply system of the trailer brake synchronizer of the utility model embodiment.

[0028] Figure 3 It is a third structure diagram of the power supply system of the trailer brake synchronizer of the utility model embodiment.

[0029] Figure 4 It is a power supply port diagram of the power supply system of the trailer brake synchronizer of the utility model embodiment.

[0030] Figure 5A fourth structure schematic view of the power taking system of the trailer brake synchronizer of the embodiment of the present utility model.

[0031] Figure 6 A structure schematic view of the vehicle of the embodiment of the present utility model.

[0032] The power taking port is marked as:

[0033] The power taking port 10; the power supply pin 110; the first power supply pin 1101; the second power supply pin 1102; the control pin 120; the signal acquisition pin 1201; the signal output pin 1202; the power management controller 20. DETAILED DESCRIPTION

[0034] In order to make the personnel in the technical field better understand the technical solutions in the present specification, the technical solutions in the present utility model will be described clearly and completely in the present specification, and obviously, the described embodiments are only part of the embodiments in the present specification, but not all the embodiments. Based on the embodiments in the present specification, all other embodiments obtained by the ordinary skilled in the art without creative labor should belong to the scope of protection of the present specification.

[0035] Based on the foregoing, in the trailer application scenario, the brake synchronization performance of the towing vehicle and the trailer is a key factor for driving safety. At present, most of the vehicles on the market do not include the trailer brake control function in the standard configuration when they are shipped, and the user needs to install the trailer brake synchronizer to realize the brake synchronization function.

[0036] However, the installation of the trailer brake synchronizer is very complex, and the user needs to complete the wiring operation of the power supply line and the brake signal line. Specifically, the trailer brake synchronizer needs to access the battery of the towing vehicle to obtain stable power supply, and accurately connect the brake signal of the towing vehicle. Such operation needs to have a deep understanding of the vehicle electrical system, and ordinary users are easy to cause equipment failure due to wiring error, and then cause safety problems.

[0037] To this end, the utility model provides a kind of power taking system of trailer brake synchronizer and vehicle, scheme aims at providing a kind of convenient trailer brake synchronizer connecting mode for tractor.The specific scheme reserves a special power taking port for trailer brake synchronizer on tractor, and the power taking port includes two key function pins: power supply pin and control pin.Power supply pin is used to access the battery of tractor, to provide power support for trailer brake synchronizer, and control pin is used to access the brake signal of tractor, to realize the control of trailer brake synchronizer, so as to complete trailer braking operation.For users, only need to insert trailer brake synchronizer into reserved power taking port, can complete all necessary connection, without complex power supply line and brake signal line wiring operation.This design not only simplifies installation process, reduces use threshold, but also effectively avoids security risks caused by wiring error.

[0038] Specifically, Figure 1 It is the structure diagram of the power taking system of an embodiment of the utility model, including:

[0039] Power taking port 10 is arranged on tractor, and the power taking port 10 is adapted to trailer brake synchronizer (specifically adapted to the plug of trailer brake synchronizer power taking) and is provided with the following pins:

[0040] Power supply pin 110 is connected with the battery of tractor to form power supply circuit, and in the case that trailer brake synchronizer accesses power taking port 10, the battery of tractor supplies power to trailer brake synchronizer through power supply pin 110;

[0041] Control pin 120 accesses the brake signal of tractor, and in the case that trailer brake synchronizer accesses power taking port 10, the brake signal of tractor controls trailer brake synchronizer to brake trailer through control pin 120.

[0042] Specifically, referring to Figure 2 As shown, the power supply pin of the embodiment includes: first power supply pin 1101 and second power supply pin 1102, wherein the first power supply pin 1101 is directly connected with the positive pole of battery, as main power input end, for providing power for trailer brake synchronizer.Second power supply pin 1102 has two connection modes:

[0043] Mode one: directly connected with the negative pole of battery to form single negative pole loop.In the case that trailer brake synchronizer accesses power taking port 10, access power supply circuit through first power supply pin 1101 and second power supply pin 1102, and supply power from the battery of tractor.

[0044] Mode two: connecting to the negative pole of the battery and the independent ground line (such as the chassis of the towing vehicle) at the same time to form a redundant ground loop. The ground line provides a stable reference potential, reduces electromagnetic interference, and delays the electrochemical corrosion of the battery metal contacts.

[0045] On the basis of the above, in order to ensure the safety of the power supply circuit, the embodiment can also set a power supply fuse on the path of the power supply circuit. When the current value of the power supply circuit reaches a preset threshold (such as 150% of the rated current value), the power supply fuse will melt to block the power supply circuit, thereby preventing excessive current from causing damage to related equipment or causing safety accidents.

[0046] As an exemplary introduction, the battery of the towing vehicle usually uses 12V or 24V output voltage. The first power supply pin 1101 is directly connected to the positive pole of the battery, and the second power supply pin 1102 can select one of the above two connection modes as needed. The power supply fuse can use a chip fuse or a self-resetting fuse.

[0047] Among them, the working principle of the chip fuse is that when the power supply circuit overflows (current exceeds the preset threshold), the conductive medium in the fuse body will melt instantaneously due to heat accumulation, thereby physically cutting off the power supply circuit. This melting process usually occurs in a very short time (≤50ms), so it has the advantage of fast response. In addition, the chip fuse has a simple structure and small size, which is suitable for vehicle circuit deployment.

[0048] The self-resetting fuse realizes overcurrent protection by changing the resistance value. When the power supply circuit overflows, the resistance of the self-resetting fuse will increase rapidly (up to tens of thousands of times), thereby limiting the current and preventing equipment damage. This fuse can automatically return to the normal resistance value after the overcurrent is eliminated, so it does not need to be replaced, reducing maintenance costs and time.

[0049] Based on the design of the above power supply circuit, the power supply system of the embodiment not only meets the power supply needs of the trailer brake synchronizer, but also takes into account the safety and reliability of the electrical system.

[0050] In addition, it should be noted that the brake signal types of vehicles are diverse, and the control pin 120 in the embodiment can select the relevant type of brake signal according to the braking mode of the trailer brake synchronizer. The following is a detailed description of two main modes:

[0051] 1) Towing vehicle braking force synchronization mode

[0052] In this mode, the braking force of the trailer is consistent with that of the towing vehicle. This means that the braking force information of the towing vehicle needs to be transmitted to the trailer brake synchronizer. Currently, the brake pedal sensor of the vehicle can monitor the depression depth of the brake pedal in real time and transmit it to the electronic control unit (ECU) for further calculation of the corresponding braking force. For this purpose, the control pin 120 of the present embodiment can be connected to the electronic control unit of the towing vehicle to access the brake signal containing braking force information. This mode is usually suitable for scenarios that require precise synchronization of braking force, such as in complex road conditions, to ensure consistent braking effect of the towing vehicle and the trailer, thereby improving driving safety.

[0053] 2) Fixed braking force synchronization mode

[0054] In this mode, the trailer uses a fixed braking force and does not need to transmit the braking force information of the towing vehicle. In this case, the control pin 120 of the present embodiment can be connected to the positive electrode of the brake indicator light or the brake pedal switch of the towing vehicle to access the brake signal that does not contain braking force information. Such brake signals are mainly used to transmit the brake state, such as the brake indicator light being lit in the brake state without needing to pay attention to the braking force. This mode is suitable for scenarios with low requirements for braking force, such as light load or short-distance trailer transportation.

[0055] As an exemplary introduction, referring to Figure 3 the control pin 120 of the present embodiment specifically includes the following two parts:

[0056] I. Signal acquisition pin 1201:

[0057] The signal acquisition pin 1201 is used to access the brake signal. According to different application scenarios, it can be connected to the following devices:

[0058] In the fixed braking force synchronization mode, the signal acquisition pin 1201 is connected to the brake pedal switch or the positive electrode of the brake indicator light to access the signal reflecting the brake state. In this case, the brake signal collected by the signal acquisition pin 1201 only reflects whether the brake is depressed or released, without containing specific braking force information.

[0059] In the towing vehicle braking force synchronization mode, the signal acquisition pin 1201 is connected to the electronic control unit to access the brake signal containing specific braking force information.

[0060] II. Signal output pin 1202:

[0061] The function of the signal output pin 1202 is to pre-process the brake signal collected by the signal collection pin 1201, and output the pre-processed brake signal to the trailer brake synchronizer in the case of the trailer brake synchronizer accessing the power taking port 10, so as to control the trailer brake synchronizer to brake the trailer. Specifically:

[0062] In the fixed braking force synchronization mode, the signal output pin 1202 performs gain processing on the brake signal received by the signal collection pin 1201, adjusts it to a fixed braking force value, and then sends it to the trailer brake synchronizer. In this way, the trailer brake synchronizer will brake the trailer according to the fixed braking force.

[0063] In the tractor braking force synchronization mode, the signal output pin 1202 directly sends the brake signal received by the signal collection pin 1201 to the trailer brake synchronizer. This direct sending method is also a kind of pre-processing method, which ensures that the trailer brake synchronizer can brake the trailer according to the actual braking force of the tractor.

[0064] In summary, the power taking port 10 of the embodiment as shown in Figure 4 includes four pins, namely: the first power supply pin 1101, the second power supply pin 1102, the signal collection pin 1201 and the signal output pin 1202. These pins are not limited to needle-shaped pins, patch-shaped pins and sliding groove-shaped pins, etc., which are not specifically limited in this article. Since only the brake signal output by the signal output pin 1202 belongs to the special application of trailer synchronous braking, the power taking port 10 can realize the function by using a standard interface with a reserved pin. For example, a 13-pin pin interface of the European standard is used, wherein the 12th pin is a reserved pin, which is used as the signal output pin 1202.

[0065] In specific applications, the power taking port 10 is not limited to being arranged at the following positions:

[0066] 1) The bottom of the storage box of the tractor co-driver: This position is relatively concealed and not easy to be touched by mistake by the user, and at the same time, it is convenient for the user to easily find and use the power taking port 10 for connection after parking. In addition, the space at the bottom of the storage box is usually relatively spacious, which can accommodate longer cable lines, facilitating the connection and operation of the trailer brake synchronizer.

[0067] 2) Inside the storage box of the tractor co-driver: This position further improves the concealment. At the same time, the inside of the storage box usually has a special partition or space design, which can protect the power taking port 10 from being damaged.

[0068] 3) The central control console of the tractor: This position is convenient for the user to quickly connect the trailer brake synchronizer when needed, and at the same time, it will not be touched by mistake by the user frequently.

[0069] In summary, the power taking port 10 of the embodiment not only fully considers the convenience and safety of users, but also simplifies the installation process and reduces the difficulty of use by adopting a standard interface and reserved pins.

[0070] It should be noted that the above is the basic design of the power taking port, and the embodiment can further improve user experience through the following extensions based on the basic design:

[0071] I. Dust cover

[0072] The dust cover is made of thermoplastic polyurethane rubber material and has a flip cover structure, which is fixed by buckling or magnetic attraction. When the power taking port is idle, the dust cover can completely cover all the pins, such as the pin area in Figure 4 .

[0073] II. LED indicator

[0074] The LED indicator supports the indication of different states of the power taking port, which can not be limited to the following table:

[0075]

[0076] In addition, some trailer brake synchronizer products on the market have display screens, indicator lights and other power-consuming components installed, resulting in high power consumption. Therefore, it is necessary to manage the power supply to avoid wasting the battery power. Based on this, referring to Figure 5 , the power taking system of the embodiment further sets a power management controller (PMC) 20, which accesses the power supply state signal of the towing vehicle and controls the on-off of the power supply circuit according to the power supply state signal when the trailer brake synchronizer accesses the power taking port 10.

[0077] Specifically, the power supply state signal includes the following types:

[0078] 1) Power-on signal: When the towing vehicle is powered on, the power management controller 20 detects the power-on signal, and at this time, the power supply circuit is controlled to be turned on to supply power to the trailer brake synchronizer.

[0079] 2) Power-off signal: When the towing vehicle is powered off, the power management controller 20 detects the power-off signal, and at this time, the power supply circuit is controlled to be blocked to stop supplying power to the trailer brake synchronizer.

[0080] 3) Low power signal: When the battery of the towing vehicle has low power, the power management controller 20 detects the low power signal, and at this time, the power supply circuit is also controlled to be blocked to avoid the trailer brake synchronizer continuing to consume power.

[0081] Based on the above design, as long as the tractor is powered on, the battery will supply power to the trailer brake synchronizer; once the tractor is powered off or the battery is in a low power state, the power supply to the trailer brake synchronizer is stopped. This power supply management method effectively avoids the problem of battery depletion caused by the trailer brake synchronizer, and also ensures that the trailer brake synchronizer can work normally when needed.

[0082] In a specific implementation, the embodiment is provided with a relay on the path of the power supply circuit. The power management controller 20 is connected with the relay, and in the case that the trailer brake synchronizer accesses the power taking port 10, the power management controller 20 controls the relay to turn on / off the power supply circuit based on the power state signal.

[0083] As an exemplary introduction, the relay of the embodiment can be an electromagnetic relay or a solid-state relay. The electromagnetic relay has the characteristics of low cost, simple structure and strong impact resistance. The characteristics of the electromagnetic relay are no mechanical contact, long service life and fast response (μs level).

[0084] Here, the electromagnetic relay in the normally open state is taken as an example, and the electromagnetic relay is internally provided with a coil, an armature and a reset spring. The corresponding driving principle is as follows:

[0085] Coil power-on: the power management controller 20 outputs a driving signal to the relay under the control of the power state signal, the coil of the electromagnetic relay generates an electromagnetic field, the armature is attracted to make the moving contact and the static contact closed, and the main power supply circuit is turned on.

[0086] Coil power-off: the power management controller 20 stops outputting the driving signal to the relay under the control of the power state signal, the electromagnetic field of the coil disappears, the armature is reset under the action of the reset spring, and the power supply path is completely cut off.

[0087] It should be noted that the above power-on signal, power-off signal and low power signal are all existing power state signals of the vehicle. Under the driving of the power state signal, the power management controller does not need to rely on the computer program to drive the relay to turn on / off the power supply circuit, so the utility model does not involve the improvement of the computer program. In addition, the vehicle type of the tractor is not limited in the disclosure, as long as the vehicle meets the standard of the tractor, it can be applied to the power taking system of the embodiment.

[0088] In summary, the power taking system of the utility model has the following characteristics:

[0089] 1) Plug and play: the power taking port integrates power supply and control functions, users do not need complex wiring, installation time is shortened by about 70%, and the risk of misoperation is reduced.

[0090] 2) Intelligent power saving: the power management controller dynamically controls the power supply according to the vehicle power state, automatically powers off when the battery is low, and avoids the problem of power loss.

[0091] 3) Strong compatibility: the power supply port adopts a standard interface (such as a European standard 13-pin), and can be deployed modularly.

[0092] 4) Enhanced safety: the power supply circuit has a built-in double protection mechanism (fusing insurance and redundant ground), the overcurrent protection response time is fast, and the ground impedance is less than 0.1Ω, effectively preventing short circuits and electromagnetic interference.

[0093] Figure 6 The vehicle structure schematic diagram of another embodiment of the utility model, the vehicle 60 includes: battery 610 and the above-mentioned trailer brake synchronizer's power taking system 620. The vehicle of this embodiment reserves a power taking port for the trailer brake synchronizer through the power taking system 620. Among them, the power taking port is provided with a power supply pin and a control pin. The power supply pin is used to access the battery of the towing vehicle to provide power support for the trailer brake synchronizer, and the control pin is used to access the brake signal of the towing vehicle to realize the control of the trailer brake synchronizer, thereby completing the trailer braking operation. This design makes the user use the vehicle as a towing vehicle, only needs to access the trailer brake synchronizer to the reserved power taking port, can complete all necessary connections, without again carrying out the complicated power supply line and brake signal line wiring operation.

[0094] On the basis of the above, the power taking system 620 is also configured with a power management controller, which accesses the power state information of the vehicle of this embodiment, thereby supplying power to the trailer brake synchronizer according to the state of the battery 610. For example: in the case that the power management controller 20 detects the power-on signal, the power supply circuit corresponding to the power supply pin is controlled to be turned on to supply power to the trailer brake synchronizer; in the case that the power management controller 20 detects the power-off signal or the low power signal, the power supply circuit corresponding to the power supply pin is controlled to be blocked to terminate the power supply to the trailer brake synchronizer. That is, the power management controller can provide effective power management for the battery 610 to avoid the power loss of the battery 610 caused by the trailer brake synchronizer.

[0095] It should be noted that the vehicle of this embodiment can achieve the same technical effects as the power taking system 620 when used as the application subject of the power taking system 620, which will not be described here.

[0096] Through the description of the above embodiments, those skilled in the art can understand that, for the convenience and brevity of description, only the division of the above functional modules is exemplified, and in actual application, the above functions can be completed by different functional modules according to needs, that is, the internal structure of the circuit is divided into different functional modules to complete all or part of the functions described above.

[0097] In the embodiments provided by the present application, it should be understood that the disclosed circuit can be implemented in other manners. For example, the circuit embodiments described above are merely schematic; the division of the modules or units is merely logical function division; there can be another division manner in actual implementation; for example, a plurality of units or components can be combined or integrated into another circuit, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between the units can be indirect couplings or communication connections through some interfaces, circuits or units, and can be electrical, mechanical or in other forms.

[0098] In the description of the present disclosure, it should be understood that, if the terms "upper", "lower", "front", "back", "left" and "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are merely for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the position or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present disclosure.

Claims

1. A power take-off system for a trailer brake synchronizer, comprising: The power supply system comprises: a power taking port arranged on the towing vehicle, the power taking port being adapted to the trailer brake synchronizer and being provided with: a power supply pin connected with a storage battery of the towing vehicle to form a power supply circuit, the storage battery supplying power to the trailer brake synchronizer through the power supply pin in the case that the trailer brake synchronizer accesses the power taking port; a control pin accessing a brake signal of the towing vehicle, the brake signal controlling the trailer brake synchronizer to brake the trailer through the control pin in the case that the trailer brake synchronizer accesses the power taking port.

2. The power taking system of claim 1, wherein, Further comprising: a power management controller accessing a power state signal of the towing vehicle, the power management controller controlling the power supply circuit to be on or off based on the power state signal in the case that the trailer brake synchronizer accesses the power taking port.

3. The power supply system according to claim 2, wherein the power state signal comprises at least one of a power on signal, a power off signal and a low power signal; wherein, in the case that the trailer brake synchronizer accesses the power taking port and the power state signal accessed by the power management controller is the power on signal, the power management controller controls the power supply circuit to be on; in the case that the trailer brake synchronizer accesses the power taking port and the power state signal accessed by the power management controller is the power off signal or the low power signal, the power management controller controls the power supply circuit to be off.

4. The power supply system according to claim 2, wherein a path of the power supply circuit is provided with a relay, the power management controller is connected with the relay, and the power management controller controls the relay to turn on or off the power supply circuit based on the power state signal in the case that the trailer brake synchronizer accesses the power taking port.

5. The power supply system according to any one of claims 1 to 4, wherein the control pin comprises: a signal acquisition pin connected with one of a brake pedal switch, a positive electrode of a brake indicator lamp and an electronic control unit of the towing vehicle to access the brake signal; a signal output pin, which pre-processes the brake signal acquired by the signal acquisition pin and outputs the pre-processed brake signal to the trailer brake synchronizer to brake the trailer in the case that the trailer brake synchronizer accesses the power taking port.

6. The power supply system according to claim 5, wherein the power taking port is a standard interface, and the signal output pin is a reserved pin of the standard interface.

7. The power supply system according to any one of claims 1 to 4, wherein the power supply pin comprises: a first power supply pin connected with a positive electrode of the storage battery. A second power supply pin connected with the negative pole of the battery, or connected with the ground wire and the negative pole of the battery at the same time; wherein, in the case that the trailer brake synchronizer accesses the power taking port, the trailer brake synchronizer accesses the power supply circuit through the first power supply pin and the second power supply pin. 8.The power taking system according to any one of claims 1 to 4, characterized in that, A power supply fuse is arranged on the passage of the power supply circuit, and the power supply fuse is fused when the current value of the power supply circuit reaches a preset threshold, so as to block the power supply circuit. 9.The power taking system according to any one of claims 1 to 4, characterized in that, The power taking port is arranged at one of the following positions: The bottom of the co-driver storage box of the towing vehicle; The inside of the co-driver storage box of the towing vehicle; The central control console of the towing vehicle.

10. A vehicle characterized by comprising: The power taking system according to any one of claims 1 to 9.

Images