Electronic control unit and method for improving electromagnetic compatibility applied by electronic control unit
An electronic control unit, domain controller technology, applied in the reduction of crosstalk/noise/electromagnetic interference (electrical components, circuit devices, etc.) Interference performance and other issues to achieve the effect of improving electromagnetic compatibility
Pending Publication Date: 2022-03-29
ZONGMU TECH SHANGHAI CO LTD
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Problems solved by technology
Electronic control units using these technologies can solve most of the electromagnetic compatibility problems, but not all of them, because designers often ignore the ground processing of input and output interfaces and mix them with the logic ground inside the circuit
The ground inside the existing circuit board is not divided, the ground of the input and output interface and the ground of the internal circuit are the same ground, which is connected to the metal shell uniformly, and the inside of the circuit board is not shielded or only used for high-frequency components Internal noise can easily cause radiation to exceed the standard, and external interference will also be directly coupled to the logic ground of the internal circuit through the ground of the input and output interfaces, reducing the radiation anti-interference performance of the electronic control unit
Method used
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[0015] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.
[0016] It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic ideas of the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and number of componen...
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The invention provides an electronic control unit and a method for improving electromagnetic compatibility applied by the electronic control unit. The ground of a circuit board of the electronic control unit is divided into an interface ground and a logic ground; the ground of an input / output interface connector of the electronic control unit is used as an interface ground, is used as a part of a shell ground and is connected with a metal shell of the electronic control unit, and a shielding mechanism is arranged on one side, close to the interface ground, of a division part of the interface ground and a logic ground, so that the electromagnetic compatibility of the electronic control unit can be effectively improved.
Description
technical field [0001] The invention relates to the technical field of electronic control units, in particular to an electronic control unit and a method for improving electromagnetic compatibility of the electronic control unit and its application. Background technique [0002] Electronic control unit (ECU) is the core component of automotive electronics, which is composed of integrated circuits such as microprocessor, memory, input and output interfaces, and analog-to-digital conversion. The electronic control unit receives and processes the signals from the sensors, and calculates the control signals sent to the controller. It is the "brain" of the car and has strict electromagnetic compatibility requirements. Electronic control units with higher power generally use metal casings to facilitate heat dissipation and enhance electromagnetic compatibility. [0003] At present, the electromagnetic compatibility design methods of electronic control units using metal shells inc...
Claims
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IPC IPC(8): H05K9/00H05K1/02
CPCH05K9/0064H05K9/0007H05K1/0215
Inventor 李军龚璐张风关岩刘利峰刘佳月
Owner ZONGMU TECH SHANGHAI CO LTD