Starting circuit for automobile

Abstract

Provided is a starting circuit for an automobile. The starting circuit for the automobile comprises a storage battery, a battery main switch and a starter, wherein the positive pole of the storage battery is connected with one end of the battery main switch through a power line, the other end of the battery main switch is connected with the positive pole of the starter through a starter positive wire, the negative pole of the starter is connected with the negative pole of the storage battery through a negative bond strap, a bonding piece is arranged on the negative bond strap, the bonding piece is connected with a common bonding point on a frame, the positive pole of the storage battery is connected with the input end of a finished automobile electrical appliance constant-electricity load and the input end of a finished automobile electrical appliance non-constant-electricity load, and the output end of the finished automobile electrical appliance constant-electricity load and the output end of the finished automobile electrical appliance non-constant-electricity load are connected with the common bonding point and other bonding points on the frame through a frame harness respectively. According to the starting circuit for the automobile, the phenomenon that electricity of the starting circuit goes to other circuits by mistake can be effectively prevented, the phenomena that the electricity goes to a frame harness by mistake and a fire breaks out are effectively avoided, safety and reliability are high, and the application range is wide.

Description

technical field [0001] The invention relates to a starting system for a car, in particular to a starting circuit for a car, which is particularly suitable for preventing negative wires from being connected in series and protecting the wiring harness of a vehicle frame. Background technique [0002] The electrical system of the automobile chassis usually uses the engine ground wire and the battery negative wire respectively to connect the negative poles of the starter and the battery to the frame. The installation method of the common frame grounding point of the battery negative line and the negative line of the battery. The problem with this connection method is that the large current generated during the entire starting process flows through the 9 parts of the vehicle, there are many intermediate links, and there are many hidden trouble points. [0003] The Chinese patent authorization announcement number is CN202140217U, and the utility model patent with the authorizatio...

AI Technical Summary

Problems solved by technology

The problem with this connection method is that the large current generated during the entire starting process flows through the 9 parts of the vehicle, there are many intermediate links, and there are many hidden trouble points.

The large current generated during the starting process flows through 9 parts of the vehicle, there are many intermediate links, and there are many potential failure points. The resistance of the route through which the large current flows is relatively large. The virtual connection of the iron point makes the resistance at the virtual contact point too large, which will cause a series of electricity phenomenon, that is, a large current flows from other grounding points with small resistance to the negative pole of the battery through the frame wire harness; because the instantaneous current of the starting circuit can reach 500 amperes-600 Amperes, and the maximum current of the frame wiring harness cannot exceed 50 amperes. Excessive current will cause the frame wiring harness to burn out, and even cause the whole vehicle to catch fire. There are major safety hazards and huge economic losses.

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