An EHC control system

Abstract

This utility model discloses an EHC control system, including a power supply, an EHC heating wire, and a controller. The positive terminal of the power supply is connected to one end of the EHC heating wire, and the negative terminal of the power supply and the other end of the EHC heating wire are grounded, forming a power circuit for the EHC heating wire. It also includes a switching component, which is connected in series across the two ends of the EHC heating wire and connected to both the power supply and the controller. The switching component controls the on / off state of the power circuit of the EHC heating wire. This solution, by using a switching component between the power circuit and the controller, effectively avoids short circuits caused by component damage without affecting circuit operation. Furthermore, the structure is simple, requiring no additional modules, and effectively protects the circuit at a very low cost.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing technology, specifically to a highly reliable EHC control system. Background Technology

[0002] In the body control unit, the EHC heating wire is an important auxiliary device for the body generator set. It can provide a stable preheating function to ensure the normal operation of the generator set in various environments.

[0003] The EHC heating wire is equipped with an EHC controller, which is a control unit that controls the duration of current flow to the EHC (electric heating DOC) and the impact of the current flow on the current fluctuations of the entire vehicle's electrical grid system.

[0004] The existing EHC controller has a circuit that is always conducting between itself and the EHC heating wire, which can easily lead to power loss, severely deplete the battery's power, and cause vehicle fires.

[0005] Therefore, the existing EHC heating line control system has low reliability due to the aforementioned technical problems. It is evident that improving the reliability of the EHC control system is a problem that needs to be solved in this field. Utility Model Content

[0006] In view of the technical problem that existing EHC control systems are prone to power depletion, which greatly depletes the battery power and can lead to vehicle fires, the purpose of this utility model is to provide an EHC control system that can effectively avoid power depletion caused by component damage and short circuits without affecting the operation of the circuit, thus effectively overcoming the problems existing in the prior art.

[0007] To achieve the above objectives, this utility model provides an EHC control system, including a power supply, an EHC heating wire, and a controller. The positive terminal of the power supply is connected to one end of the EHC heating wire, and the negative terminal of the power supply and the other end of the EHC heating wire are grounded, forming a power supply circuit for the EHC heating wire. The system also includes a switching component, which is connected in series at both ends of the EHC heating wire and is connected to the power supply and the controller respectively. The switching component controls the conduction and cutoff of the controller and the power supply circuit of the EHC heating wire.

[0008] Furthermore, the switching components include a first MOSFET and a second MOSFET, which are connected in series at both ends of the EHC heating wire and connected to the power supply and the controller, respectively.

[0009] Furthermore, the gate of the first MOSFET is connected to the controller, the source of the first MOSFET is connected to the positive terminal of the power supply, and the drain of the first MOSFET is connected to the input terminal of the EHC heating wire.

[0010] Furthermore, the gate of the second MOSFET is connected to the controller, the source of the second MOSFET is connected to the output terminal of the EHC heating wire, and the drain of the second MOSFET is grounded.

[0011] Furthermore, the first MOSFET and the second MOSFET are turned on or off synchronously.

[0012] The EHC control system provided in this solution, by setting up switching components between the power supply circuit and the controller of the EHC heating line, can effectively avoid power loss caused by component damage and short circuit without affecting the operation of the circuit.

[0013] Secondly, the structure is simple, requiring no additional modules, and effectively protects the circuit at a very low cost. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 This is a block diagram of the EHC control system. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0017] Existing EHC control systems have circuits that are constantly conducting, which easily leads to power depletion, severely depleting battery power and potentially causing vehicle fires. Based on the technical problems of existing EHC control systems, this invention provides an EHC control system solution that can effectively avoid the power depletion caused by the existing EHC control system and effectively protect the circuit at a very low cost.

[0018] The EHC control system provided by this utility model is described in [reference]. Figure 1 It includes a controller (MCU) 100, an EHC heating wire 200, switching components, and a power supply 300.

[0019] The positive terminal of the power supply 300 is connected to one end of the EHC heating wire 200, and the negative terminal of the power supply 300 and the other end of the EHC heating wire 200 are grounded, forming the power supply circuit of the EHC heating wire 200, which provides power for the heating function of the EHC heating wire 200 and realizes the preheating of the generator set by the EHC heating wire 200.

[0020] The controller (MCU) 100 is connected to the EHC heating wire 200. The controller (MCU) 100 controls the duration of the energizing current of the EHC heating wire 200 and the impact of the energizing current on the current fluctuations of the entire vehicle's electrical system.

[0021] Switching components are used to enable and disable the controller 100 and the EHC heating wire circuit 200. This allows the circuit to be switched off when not needed, reducing battery power loss. The switching components in this design include a first MOSFET 410 and a second MOSFET 420. The first MOSFET 410 and the second MOSFET 420 are connected in series across the two ends of the EHC heating wire 200.

[0022] The gate of the first MOS transistor 410 is connected to the controller (MCU) 100. The gate is the control electrode of the first MOS transistor 410, which controls the current flow between the drain and the source by applying a gate voltage.

[0023] The source of the first MOSFET 410 is connected to the positive terminal of the power supply 300 to receive the power supplied to the first MOSFET.

[0024] The drain of the first MOSFET 410 is connected to the input terminal of the EHC heating line 200 to output current to the EHC heating line 200.

[0025] The second MOSFET 420 is connected in series with the EHC heating wire 200 and grounded. The gate of the second MOSFET 420 is connected to the controller (MCU) 100. The gate is the control electrode of the second MOSFET 420, which controls the current flow between the drain and source by applying a gate voltage.

[0026] The source of the second MOSFET 420 is connected to the output terminal of the EHC heating wire 200 to receive the power supplied to the second MOSFET 420. The drain of the second MOSFET 420 is grounded.

[0027] In this design, the first MOSFET 410 and the second MOSFET 420 must be turned on simultaneously during normal system operation for the power circuit between the controller and the EHC heating wire to conduct properly, allowing the EHC heating wire 200 to heat normally. Similarly, when the system stops working, the first MOSFET 410 and the second MOSFET 420 are turned off simultaneously.

[0028] In addition, when the first MOSFET 410 is short-circuited and damaged, the second MOSFET 420 can be used as a protective switch to stop conducting and cut off the circuit, thereby avoiding the loss of battery power and playing a protective role.

[0029] The EHC control system provided in this solution can effectively prevent power loss caused by component damage and short circuits without affecting the operation of the circuit.

[0030] Secondly, the structure is simple, requiring no additional modules, and effectively protects the circuit at a very low cost.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An EHC control system comprising a power supply, an EHC heating wire and a controller, the positive pole of the power supply is connected with one end of the EHC heating wire, the negative pole of the power supply and the other end of the EHC heating wire are grounded, which forms a power supply circuit of the EHC heating wire, characterized in that, It also includes switching components, which are connected in series at both ends of the EHC heating wire and respectively connected to the power supply and the controller. The switching components control the conduction and cutoff of the controller and the power circuit of the EHC heating wire.

2. The EHC control system of claim 1, wherein, The switching components include a first MOSFET and a second MOSFET, which are connected in series at both ends of the EHC heating wire and connected to the power supply and the controller, respectively.

3. An EHC control system according to claim 2, wherein, The gate of the first MOSFET is connected to the controller, the source of the first MOSFET is connected to the positive terminal of the power supply, and the drain of the first MOSFET is connected to the input terminal of the EHC heating wire.

4. The EHC control system of claim 2, wherein, The gate of the second MOSFET is connected to the controller, the source of the second MOSFET is connected to the output terminal of the EHC heating wire, and the drain of the second MOSFET is grounded.

5. The EHC control system of claim 2, wherein, The first MOSFET and the second MOSFET are turned on or off synchronously.

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