The application difference between power shrapnel terminal and signal shrapnel terminal

The respective characteristics of the power shrapnel terminal and the power connector.

1 Definition of current carrying (current size) for power shrapnel terminals and signal shrapnel terminals.

2 The influence of temperature in power supply applications.

Definition of connector rated current.

The temperature rise of connectors in various test standards.

The connector allows the controversy of temperature rise.

The influence of the test method on the temperature rise of the connector.

The influence of the connector status on the current carrying capacity test.

3 factors influencing the current carrying capacity of the test connector.

(1) Overview of connector temperature rise.

The balance of heat generation and heat dissipation of the connector.

The heat generation of the connector.

3 ways to dissipate heat from the connector.

Heat radiation.

Hot convection.

The conduction of heat.

(2) Heat generation and body resistance of the connector.

The specific gravity requirements of the respective resistances of the power shrapnel terminal and the signal shrapnel terminal.

How to calculate the resistance of the shrapnel terminal body.

(3) The heat generation of the connector and the local ultra-high temperature of the interface.

The resistance heat of the connector interface.

How does the local ultra-high temperature of the connector interface occur?

The calculation formula of the local ultra-high temperature of the connector interface.

The local ultra-high temperature characteristics of the connector interface.

The hazard of local ultra-high temperature at the connector interface.

3 Continuous current and instantaneous current of the connector.

Continuous current; instantaneous current; overload current.

The current loading process.

The determination of the instantaneous current.

The quantitative relationship between the instantaneous current of the common coating and the contact resistance of the connector.

Connector overload current, the quantitative relationship between overload time and rated current.

4 Design standards for power shrapnel terminals.

(1) Local ultra-high temperature standards.

4 local ultra-high temperature standards.

The source of the local ultra-high temperature standard / the relationship between the local ultra-high temperature and the contact voltage.

(2) The relationship between local ultra-high temperature standards and contact resistance.

The separation interface derived from the local ultra-high temperature standard, the permanent connection interface, the relationship between the contact resistance and the current at the end of the product life.

Discussion on the relationship between the contact resistance of the power shrapnel terminal and the amount of current.

(3) Consideration of the resistance of the shrapnel terminal body.

Reduce the resistance of the shrapnel terminal body.

How to choose copper (alloy) to reduce the resistance of the shrapnel terminal body refers to the heat dissipation capacity.

Calculation of bulk resistance.

(4) Consideration of connector contact resistance.

How to reduce the contact resistance of the multi-contact contact of the power shrapnel terminal.

How to improve the contact reliability of the multi-contact contact of the power shrapnel terminal.

The multi-contact contact of the power shrapnel terminal mentions the plug life.

5 Current distribution.

(1) Dedicated power shrapnel terminal.

The size limit of the dedicated power shrapnel terminal.

The connection requirements of dedicated power supply shrapnel terminals have increased.

The dedicated power shrapnel terminal simplifies the analysis.

The influence of the size of the wire conductor on the rated current of the connector.

The influence of ambient temperature on the rated current of the connector / derating current / derating curve.

The effect of increasing the heat dissipation area on the rated current of the connector.

(2) Parallel multi-terminal application.

The advantages of parallel multi-terminal applications.

(3) Derating of multiple terminals in parallel.

A. The mutual influence of parallel multi-terminal heat dissipation.

How do multiple terminals in parallel affect each other (curve).

How do the multiple terminals in parallel and the size of the wires affect each other (test data I).

How do the multiple terminals in parallel and the size of the wires affect each other (Experimental Data II).

System factors have a huge impact on the current carrying capacity of the terminal.

B current distribution.

Factors affecting current distribution.

The influence of the resistance of the distribution circuit on the current distribution.

The influence of the resistance of the shrapnel terminal body on the current distribution.

The influence of the contact resistance of the shrapnel terminal on the current distribution.

(4) Summary of current distribution.

Advantages and disadvantages of dedicated power shrapnel terminals.

The advantages of parallel multi-terminals.

Disadvantages of multiple terminals in parallel.

How to deal with the connector hot plug problem.

6 The method of evaluating the current carrying capacity of the connector.

The identification method of signal shrapnel terminal and power shrapnel terminal.

The experimental process of the power shrapnel terminal.

The purpose of the series of experiments.

7Summary of power shrapnel terminals and power connectors.

The power shrapnel is very flexible, mainly in the size and shape of the force. These three parameters can be changed according to the requirements of the product. (There must be a limit change).

It has stability, flexibility and excellent conductivity. It is reflected in the low failure probability of electronic button products. Because it has good rebound strength, it is suitable for key switches of electronic products.

Very durable, stainless steel products are difficult to damage in principle, and the surface treatment can extend the life of the workpiece.