Find out what are the battery relays in your car?

According to different classification methods, there are many types of relays, and the most commonly used in automobiles is electromagnetic relays.

1) According to the working principle, there are electromagnetic relays, thermal relays, solid-state relays, electronic hybrid relays, etc., but at present, the most used in the automotive industry is electromagnetic relays, as well as some electronic hybrid relays. Electromagnetic relay is the earliest and most widely used type of relay. Electromagnetic relays are generally composed of cores, coils, armatures, contacts, reeds, leads, etc.

2) According to the load size, it can be divided into micro power relay, weak power relay, medium power relay, high power relay, etc.

3) According to the external size, it can be divided into ultra-miniature relays, miniature relays, miniature relays, etc.

4) According to the form of protection, it can be divided into sealed relay, closed relay, open relay, etc.

Flash Relays, General Purpose Relays, Violet Relays, Light Relays, Charging Relays, Soldering Relays, High Power, Starting Relays, Light Relays, Preheating Relays, Horn Relays, Magnetic Latching Relays, Wiper Relays, High Voltage DC Contactors.

According to the use or according to the structural principle, according to the use of light relays, starting relays, horn relays, starting protection relays, etc., where the small current controls the large current can be used, if you look at the structure and principle are almost the same.

How do I check for problems with automotive relays? The inspection methods of automobile relays are as follows: 1. Check the working performance of automobile relays.

Turn on the ignition switch, and then use your ears or stethoscope to listen to control whether there is a suction sound in the car relay, or feel whether the car relay has a sense of vibration with your hands, if so, it means that the relay is basically normal, and the electrical appliances do not work is caused by other reasons; Otherwise, the relay is working abnormally. It is also possible to unplug the relay for testing, for example, in the event of a failure that the air conditioning compressor does not work, the engine can be started, and then the blower switch and the air conditioning switch can be turned on. Then unplug the connector of the air conditioner compressor relay for judgment.

If the sound of the relay action can be heard, and the speed of the engine decreases significantly when the relay is unplugged, and the speed of the engine increases when the relay is inserted, it means that the relay of the air conditioning compressor and its control circuit are normal. Regarding the position of the relay, all the relays and fuses marked with dots and crosses on the circuit schematic diagram are generally arranged in the distribution box. 2. Check the ECU.

Poor ECU iron tie may affect the normal operation of the relay, turn on the ignition switch, no sound of fuel pump running, and no high-pressure fire. The ignition coil was inspected and found that there was no power supply on the plug, but the resistance on both the primary and secondary sides was normal. Measure the car's jet double seal relay with a 12V plug with a 12V power supply.

Replace the jet double seal relay, there is still no high-pressure fire, and there is no sound of relay sengching. Use a wire to directly connect the No. 10 pin of the injection double seal relay to the iron, and the sound of relay engagement can be heard, then the engine starts successfully. But the strange thing is that after disassembling this tie wire, the engine does not turn off, and the ignition switch is turned off, and after restarting the engine, it is normal.

Analyzing the reason, this is due to the poor ECU tie-up of the engine, which leads to the low power supply voltage of the relay coil (sometimes only about 2V), and it is impossible to make the relay engage. After the wire is directly attached to the iron, the relay has a voltage of 12V, so it is smoothly engaged, so the engine starts successfully. After removing the temporary tie wire (the ignition switch is still on), there is still a low holding voltage on the relay (which is a common feature of universal relays), and even if this holding voltage is only 2V, the relay will not be disconnected, so the engine will not turn off.

When the ignition switch is turned off, the self-induced electromotive force generated by the circuit is much higher than the power supply voltage, and under the action of this strong electromotive force, the poorly contacted tie may return to normal, so the engine starts normally. However, the above failures will recur, so the best way is to deal with the parts with poor tie ties. 3. Try to reduce the contact resistance of the automotive relay contact.

The contact resistance between the contacts of small electromagnetic relay for automotive use is mainly composed of two parts: shrinkage resistance and table resistance. The contact resistance of the contact is related to the contact form, material properties and surface processing of the contact. It can be seen that in order to reduce the contact resistance of the relay contact, it is possible to improve the contact state and contact material when the contact pressure is constant.

The detection methods of automotive relays are: static detection of the resistance value of the coil, detection of the resistance value of the coil, normally closed contact resistance, dynamic detection, energizing the coil, and detecting the resistance value of the normally open contact

1. The relay is a commonly used component in the automobile control circuit, which uses the principle of electromagnetic induction to control the connection or disconnection of a certain circuit, so as to control the large current with a small current, so as to reduce the current load of the control switch contact and protect the switch contact from being ablated;

2. Electromagnetic relays are widely used in automobiles, and common relays include power supply relays, starting relays, horn relays, fog lamp relays, wiper relays, etc.;

3. The working principle of the relay, when the switch is closed, a certain voltage is added at both ends of the coil, and a certain current will flow through the coil, resulting in an electromagnetic effect, and the armature will overcome the tensile force of the return spring under the action of electromagnetic force attraction to attract to the iron core, so as to drive the dynamic contact of the armature to engage with the static contact (normally open contact), and the red bulb will light up at this time;

4. When the coil is powered off, the electromagnetic suction force will also disappear, and the armature will return to the original position under the reaction force of the spring, so that the dynamic contact and the static contact (normally closed contact) are engaged, and the green bulb will be lit up at this time. In this way, it is engaged and released, so as to achieve the purpose of conduction and cutting in the circuit.

Today's car needs to give you a brief introduction to a little knowledge, that is, safety relays, which are quite common in our daily life. The key role is to ensure the safety of our daily life, prevent electric shock and injury to the bridge, and avoid overheating of the equipment. I think this is only a small part of the relay, so the vital mission of the car is here, that is, to give you a brief introduction, what is the function of the safety relay?

Introduction to Automotive Relay Functions: Functions.

A solid-state relay is a non-contact electronic switch with an isolation function. There are no mechanical contact parts during the switching. Therefore, the solid state relay not only has the same function as the electromagnetic relay, but also has the characteristics of logic circuit compatibility, vibration resistance, mechanical shock resistance, installation position is not restricted, moisture-proof, mildew-proof, good corrosion resistance, explosion-proof, excellent anti-ozone pollution performance, low input power, high sensitivity, low regulation power, good electromagnetic compatibility, low noise, and high working frequency.

Now it has been widely used in computer peripheral equipment, temperature regulation, speed regulation, dimming, motor regulation, electric furnace heating regulation, electric power petrochemical, medical equipment, financial equipment, coal, instrumentation, travel letter guess number and other fields.

Introduction to Automotive Relay Functions: Introduction.

The relay is an automatic adjustment device, and when the input (electrical, magnetic, sound, light, heat) reaches the required value, its output will change by leaps. Automotive relays are used in automobiles, with high switching load power and strong resistance to shock and vibration. The power supply in automobiles is mostly 12V, and the coil voltage is basically designed to be 12V.

Because the battery is powered, the voltage is unstable; The environment is harsh and the suction voltage is low; 60%VH (rated working voltage); The coil overvoltage is allowed to reach, the coil power consumption is large, most of it is in, and the temperature rises. The environmental requirements are quite strict: the ambient temperature range in the cabin should be -40 125, and the ambient temperature in other places should be -40 85; Relays used in the engine compartment need to be able to withstand sand, dust, water, salt, and oil; The vibrations and shocks are quite intense.

That's it for today's car introduction. The above is a brief introduction to the functions of safety relays in automobiles. The above car is basically quite basic knowledge.

I hope that my friends can basically understand a little bit and protect themselves more. It's good to know a little bit more. I hope that the simple introduction of the car can solve the problem for the little friends.

Millions of car purchase subsidies.

A relay is a switching device that is controlled with an electric current. It is an indispensable actuator in various automatic control circuits. It is a kind of power equipment, which is often used in automatic control circuits, and can control the conduction and cut-off of large currents with a small current, so as to play the role of automatic control.

The role of the relay is mainly amplification, with a very small current, you can control a very large power circuit, but also expand the control range, when the signal reaches a certain value, you can change at the same time, open, open and turn on multiple circuits according to the different forms of the contact group, so as to achieve the purpose of automatic switching.

A relay is a switching device that is controlled with an electric current. It is an indispensable actuator in various automatic control circuits. Relay (English name:

Relay is an electrical control device, which is an electrical appliance that makes a predetermined step change of the controlled quantity in the electrical output circuit when the change of the input quantity (excitation quantity) reaches the specified requirements. It has an interactive relationship between the control system (also known as the input loop) and the controlled system (also known as the output loop). Usually used in the control circuit of automation, it is actually a kind of "automatic switch" that uses a small current to control the operation of a large current.

Therefore, it plays the role of automatic adjustment, safety protection, and conversion circuit in the circuit.

The working principle of the automotive relay is that the coil is energized to generate a magnetic field, and then the iron sheet connected to the contact is sucked in, so that the circuit path can achieve the purpose of protecting the circuit. The following is an introduction to relays:1

The general connection method is that the two wires of the coil are one positive and one negative, and one end is connected to the switch. The rest of the wires are connected to the electrical appliances. 2.

The automotive relay can be regarded as a combination of two parts: the control circuit working by the coil and the main circuit working by the contact. 3.In the control circuit of the relay, there is only a small working current, which is due to the small contact capacity of the control switch, which can be used to directly control the load with large power consumption, and can only be controlled by the contact of the relay.

4.A relay is both a control switch and a control object (actuator).