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With the development of the new energy automobile industry, the pain point of consumers gradually from the range transition to efficient energy experience, the promotion of high-power, high-efficiency charging facilities is imminent.
In this process, the upstream and downstream industry chain enterprises need to cooperate to deal with various challenges under the trend of fast charging, including batteries, charging facilities, materials，and applications. We look forward to the leading companies in the upstream and downstream of the industry chain to provide more efficient and easy-to-use solutions for the fast charging of new energy vehicles.
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When using connectors, we will inevitably encounter the situation of connector short circuits, so before purchasing or selecting connectors, we need to understand the short circuit withstand strength of connectors.
The short circuit withstands the strength of connectors refers to the strength that can withstand the short circuit current impact under normal use conditions without causing damage to the connector's insulation or causing danger.
It has extremely important safety performance requirements. This article will explain the qualified standards for connector short circuit withstand strength and the solution to connector short circuits.
Qualified standards for connector short circuit withstand strength
The standards for connector short circuit withstand strength are jointly formulated by the International Electrotechnical Commission (IEC) and the national standard (GB), and have different standard requirements in different fields. In general civil appliances and commercial electronic equipment, the IEC 60335 standard is generally used for testing. In the IEC 60335-1 standard, the requirements for connector short circuit withstand strength are as follows:
1. Stability requirements: During the short circuit test, the connector should remain stable and should not be loose.
2. Current strength requirements: The short circuit current strength should be determined according to the scope of use, the rated current, and the rated voltage of the equipment.
3. Short-circuit time requirement: The short-circuit test time should be 1 second.
4. Strength requirement: Before the short-circuit test begins, the power supply should be connected to the end of the line, not the connector itself. The insulation part of the connector should be able to withstand twice the rated voltage. No insulation breakdown should occur during the short-circuit test.
5. Size requirement: The size of the connector withstand strength test sample must comply with the provisions of GB 2099.1, and the use environment and requirements of the connector should be taken into account during the test.
In China, GB 2099.1 also stipulates the short-circuit withstand strength of the connector, which is the same as IEC 60335-1, but according to different use environments, the test current and test cycle are also different. When using connectors, we should choose and use them according to the actual situation and requirements, and try to avoid using connectors that are not allowed by the specifications.
The above is an introduction to the qualified standards for connector short-circuit withstand strength. If we encounter a short circuit in the connector, how should we solve it? The following is a popular science for you:
How to deal with connector short circuit
A connector short circuit refers to a short circuit between two circuits that should not be connected due to poor wire contact or equipment failure during use. At this time, the current will flow directly from one circuit to another, which may cause problems such as overcurrent or equipment damage. Timely processing is required to ensure the safe and stable operation of the equipment. The following is the treatment method for connector short circuits:
1. Disconnect the power supply: First, when the connector is found to be short-circuited, the power supply of the equipment should be cut off immediately to prevent the current from passing through the short-circuit path and causing greater damage.
2. Troubleshooting: Find the cause of the connector short circuit, such as poor wire contact, equipment circuit failure, or poor performance of the connector used.
3. Replace the connector: If there is a problem with the connector itself, it is generally necessary to replace the connector, because, after a long time of use, the contact point of the connector will turn color due to oxidation, resulting in poor contact, the current will rise sharply, and eventually short-circuit, causing equipment damage or safety hazards. According to statistics, about 90% of the faults are caused by short circuits caused by connector failures.
4. Adjust the contact position: If the cause is poor contact of the wire, it is necessary to adjust the contact position between the wire and the connector to ensure that the signal transmission reaches the optimal state.
5. Repair equipment failure: If the short circuit is caused by a circuit failure of the equipment, the equipment needs to be tested and repaired, the fault needs to be eliminated, and the normal use of the equipment needs to be ensured.
6. Preventive measures: During normal use, pay attention to keeping the equipment and connectors clean, and regularly check the contact between the equipment and connectors to prevent short circuit problems in the connectors.
In short, the short circuit problem of the connector needs to be eliminated in time to reduce the factors that cause equipment failures to ensure the safe and stable operation of the equipment.
In future production, high-quality connectors with good raw materials need to be selected. I believe that the performance of the connectors in the future will be better improved, thereby reducing the probability of short circuits in the connectors and increasing the service life of equipment and electrical appliances.
The high-voltage interlocking connector is used for high-voltage electrical appliances, cables, and other occasions of electrical connector, with waterproof, anti-fouling, shock-resistant, and other characteristics, to meet the demand for wire and cable connection interfaces, but also to protect the line and the safety of the equipment, and effectively prevent the fire caused by power failures, short circuits, and other hazards. Want to better use this connector, then first come to understand the principle of a high interlock connector, and its function.
The principle of high-voltage interlock connector
The high-voltage interlocking connector is used for high-voltage electrical appliances, cables, and other occasions of electrical connectors, with waterproof, anti-fouling, shock-resistant, and other characteristics, to meet the demand for wire and cable connection interfaces, but also to protect the line and the safety of the equipment, effectively preventing fire caused by power failures, short circuits, and other hazards. Want to better use this connector, then first come to understand the use of the high interlock connector principle, as well as its functional role.
Principle of High Voltage Interlocking Connectors
I. Structure
The structure of the high-voltage interlock connector, including the plug end, the insertion port, the interlocking mechanism, ordinary contacts, its frame, and the through-hole emergency stop interface, etc., the basic components are the interlocking mechanism and contacts.
1, interlocking mechanism: the interlocking mechanism is divided into the body and swing back and forth mechanism, the body is usually embodied in a barrel-shaped structure, the swinging mechanism is often completed inside the body of the body to rotate, the guiding frame is equipped with a contact center at both ends to ensure that the body of the body will not be physically impeded by the rotation.
2, contacts: contacts have one or more interfaces, there are one or more needle width fixed, in wiring with different insulation materials to break the formation of circuits, contacts are divided into two categories of main contacts and subcontracts, two interfaces with positioning holes between the two can be placed on the cover plate and contact bearing frame.
Principle
High-voltage interlock connector control device for mechanical and electrical short-lock, which not only protects the equipment from misuse, but also avoids possible electric shock due to misuse, and other serious dangers.
When the connector socket of the high-voltage interlock connector contacts a certain equipment plug, the interlocking mechanism is scattered, and automatically locked, to realize the electrical connection, in this state, any error operation, making the mechanism mechanically locked, the connector can not be disassembled.
When the equipment is in the power-off state or the equipment hub is not open, the interlocking mechanism of the swing system will be in the anti-stay word ring to form a closed state, the formation of a fixed interlocking, in the insertion of the socket, press the handle can be loosened interlocking mechanism. This realizes the functions of interlock connection and operation, which can effectively protect the safety of high-voltage electrical appliances as well as the transmission stability of electrical lines.
Features
1. A High-voltage interlocking connector can withstand the characteristics of high current, usually applied to high-voltage electrical appliances, cables, and electrical lines for the stability of the connection, and its insulating materials are designed to prevent the current is too large.
2. The High-voltage interlock connector mechanical structure is simple, easy to install, very convenient, and simple to use, while it has a strong anti-fouling, waterproof, corrosion-resistant, shockproof performance, and other characteristics, able to work stably in a variety of harsh environments.
3. The interlocking mechanism of the high-voltage interlocking connector can prevent accidental danger caused by operation errors.
4. The high-voltage interlock connector can detect whether the mechanical locking pressure meets the requirements in time during the use process to ensure the safety of the equipment.
Role of high-voltage interlock connector
1、Anti-misoperation
High-voltage interlock connectors rely on an interlocking mechanism to realize the connector interlock when the equipment is in the closed state, the interlocking mechanism is automatically along the swing mechanism of the clockwise direction of movement, and other contacts contact, this time to complete the electronic contact, the equipment can be normal circuit pathway.
At the same time, when the equipment is in the power-off state or the equipment hub is not open, the interlocking mechanism of the swinging system will be formed in the ring of the word to prevent the closed state, the formation of a fixed interlocking, so that it can be realized on the prevention of misuse of electrical equipment.
2. Protection against electrical hazards
The high-voltage interlock connector interlocking mechanism is characterized by ensuring that the connector is in a safe state, to avoid high-voltage circuits due to excessive electricity or current caused by an explosion or some serious electrical hazards when the equipment is opened, the interlocking mechanism through the mechanical interlocking to ensure that the electrical connection of the electrical equipment connected to the safety of the connection, and at the same time to achieve the high-voltage protection of electrical appliances and the safe operation of the equipment to ensure the continued stable operation of the equipment for a long time. This can ensure the long and stable operation of the equipment.
3、High reliability
High-voltage interlocking connectors in the connection of precision structure and interlocking mechanism, after rigorous inspection and testing to ensure the reliability of the connection, in the connection, interlocking connector handle will enter the lock position, at this time the handle will not be able to start, and at the same time interlocking connectors between the signs, will be dealt with and the formation of a closed state between the wires to ensure that the connector is clean and stable connection.
4. Simple and safe operation
High-voltage interlock connector operation is very simple, only need to press the handle of the interlock connector can be completed with a wire jack plug connection, when the plug is into the socket, the interlocking mechanism will be fixed in the socket plug, to achieve a stable electrical connection state, can ensure that the equipment for a long time to continue to operate stably!
A high-voltage DC power connector is a component used to connect a high-voltage DC power supply. It can withstand high voltage and high current and plays a role in connecting and transmitting electrical energy in the circuit.
This connector is usually made of metal materials, has good conductivity and high-temperature resistance, and can also be equipped with special functions such as waterproof, dustproof, explosion-proof, and earthquake-resistant. Let's take a look at the role and working principle of the high-voltage DC power connector:
The role of the high-voltage DC power connector
1. Power input and output: The high-voltage DC power connector is an important channel for power input and output, which can realize the transmission of high-voltage DC power and ensure stable power output.
2. Signal transmission: The high-voltage DC power connector can transmit signals and provide a reliable signal transmission path for the control and regulation of electrical equipment, ensuring the accuracy and flexibility of the equipment.
3. Electrical protection: The high-voltage DC power connector is designed with protective measures to effectively avoid circuit short circuits or other unexpected situations, thereby ensuring the stability of the equipment and the safety of long-term use.
4. Noise reduction and shielding: The design of the high-voltage DC power connector enables it to shield the electrical magnetic field and reduce the generation of electromagnetic interference noise, thereby ensuring the system stability and signal transmission quality of the equipment.
5. Air sealing and waterproofing and dustproof: High-voltage DC power connector plays an important role in waterproofing and dustproof, which can ensure that the connector can still work normally in various highly polluted or humid environments, thereby ensuring that the equipment is in a safe and effective operating state.
Working principle of high-voltage DC power connector
The working principle of high-voltage DC power connectors is based on the principles of electronics and electricity. When connecting a high-voltage DC power supply, a reliable connector is required to ensure the stability and safety of the power supply.
The high-voltage DC power connector has a double-ended connector, which can connect the power center pole and the shell to the connector respectively, and then lead the power output through the wire inside the connector. The wire inside the connector is wrapped with high-insulation material to ensure that the current will not leak or interfere with other devices during transmission.
The connector also has a grounding wire to prevent the voltage between the power center pole and the shell from being too high or too low, thereby causing damage to the electronic equipment. In addition, the external coating of the connector can also prevent the external environment from affecting the connector and the power supply.
The working principle of the current-following power connector can be regarded as the opening of a circuit. When the circuit is open, the current can flow freely through the wire inside the connector to reach the output; when the circuit is closed, the current in the wire stops flowing, thereby disconnecting the circuit.
In short, the high-voltage DC power connector is an indispensable device for connecting high-voltage DC power supplies. It can ensure the stability, safety, and reliability of power output. By understanding its working principle, you can better understand its application scope and usage methods.
The rapid development of the connector industry is obvious to all, there are two major market developments worth mentioning as a driving force, one is the development of 5G in the communication industry has led to the development of high-speed connectors, and the other is the development of new energy automotive connectors in the high-voltage connection.
According to Bishop & Associates on the global connector market in 2021, automotive connectors have surpassed communications connectors to become the largest connector market in the global connector market, accounting for 22.60% of the global connector industry. Connectors in automobiles are widely used in various systems such as power systems and body systems, especially with the development of intelligence and electrification, the number and use of high-voltage connectors throughout the vehicle is increasing.
In the field of high-voltage connector, international manufacturers continue to lead in terms of technology and brand. However, if we only look at the technology, domestic enterprises with high-voltage high-current characteristics are not too far behind and even exceeded in some indicators such as high-temperature resistance. From the perspective of the industry as a whole, domestic manufacturers lack the entire connector materials and process accumulation, as well as the accumulation of brand effect. The high-voltage connector market potential is huge, and domestic manufacturers of alternative space are also very large.
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