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Quality requirements for battery contact pin connectors

source:Industry News    Popular:pogo pin for moilble phone     release time:2022-03-01 09:17:09     Article author:sznbone

  Quality requirements for battery contact pin connectors(图1)

  1. The design quality (quality) of the battery contact pin connector, that is, the degree to which the design of the battery contact pin connector can achieve the design goal. However, the establishment of design goals is not an easy process. There is also a quality problem of design goals. Accurate design goals (or high-quality design goals) require strong support and participation from customers. The supplier and the customer communicate repeatedly. A complete consensus is reached, the design goals are clearly expressed, and the understanding of the design goals is completely consistent. Otherwise, even if other customer-related work is done perfectly, the customer will not be very satisfied. This is the first step in the quality management process. premise. We may have this experience: the customer has no complaints about the product, but is just dissatisfied. The reason is that although the product meets the requirements of the design goal and the design goal is also recognized by the customer, the design goal cannot realize the function of the product well. Therefore, the customer did not complain, but was not satisfied with the function of the product.

  For example, a customer requested to develop a connector, one of the design goals is that the RF leakage is not greater than -60dB. The test results of the designed battery contact pin connector also showed that the design goal was met, but the customer found that even if the With less than -60dB leakage the connector still has a noticeable effect on one of the surrounding components. Although customers have no complaints, they are not satisfied with the connector.

  Assuming that the design goal has been fully agreed, one of the requirements of the design goal is that the plugging life of the battery contact pin connector is not less than 10,000 times, and the pull-out force is not less than 200 grams. According to the customer's request, the battery contact pin connector design engineer designed a required shrapnel with C5240 material. According to the analysis, the stress of the shrapnel in the working state is 900MPa, and the reasonable design requires C5240 with SH hardness. Due to lack of experience, C5240 with H hardness was selected. As a result, the pull-out force of the sample was less than 200 grams after 8,000 times of life, and the shrapnel of the battery contact pin connector did not meet the requirements of the design target. This situation is that the design of the battery contact pin connector fails to achieve the design goal, and it is a design quality problem of the battery contact pin connector.

  For another example, the customer's requirements for a certain battery contact pin connector are: 5 years of life and 10mOhm (maximum) contact resistance. The corresponding design plan of the supplier is that the normal force is 80 grams and the silver plating is 2 microns. When the customer did the incoming inspection, the product could meet the contact resistance 20mOhm (maximum) requirement. After 3 years, the customer noticed that the battery contact connector had poor contact, and the contact resistance was found to be part of the battery contact connector. Resistance is greater than 200mOhm! The supplier later looked up the battery contact pin connector plating design standards and found that the normal force must be greater than 200 grams to ensure that the contact resistance is less than 10mOhm, and the internal test data also confirmed this theory. This design scheme cannot meet the requirements of the corresponding design goals. This is also an example of a battery contact pin connector design failing to meet its design goals.

  2. The quality (quality) of the design specifications of the battery contact pin connector, that is, the degree to which the design parameters (specification) of the battery contact pin connector can reach the design intent, or the degree to which the design expression can reach the design intent. Suppose the designer of a battery contact pin connector intends to design a 6pin connector with a spacing of 8 and a spacing tolerance within 0.15.

  This labeling method allows the accumulation of tolerances between the pins at both ends (the first pin and the last pin): 0.15 X 5=0.75, which violates the design intent and may cause the battery contact pin connector to fail to mate. In fact, there are many cases where the design specifications of battery contact pin connectors are of poor quality, and there are many drawings with incomplete design information. For example, we often encounter terminal diagrams of connectors that do not mark electroplating measuring points, electroplating hardness, and electroplating color. Therefore, one of the principles of design is that the interpretation of the drawings, specifications and standards of the design is unique. If there is ambiguity, it will inevitably compromise your design intent, or even withdraw from the south to the north. This is why there are various drafting standards. Even if there are various drafting standards, there are differences between the standards, even completely different, such as China, Europe, the former Soviet Union using the first angle projection method and the United States, Japan, China Taiwan using the third angle projection method. The top, bottom, left, and right views of the first angle method are the bottom, top, right, and left views of the third angle method, and the product structures expressed are quite different.

  3. The production quality (quality) of the battery contact pin connector, or the manufacturing level of the connector, that is, the degree to which the battery contact pin connector can meet the design specifications. This is what the quality of our more common connectors means. If the length marked on the drawing of a connector shell is 10+/-0.1, and the produced length is 10.12, the size is unqualified; if the drawing of the connector terminal requires electroplating gold to be 0.76um thick, and the electroplated terminal is actually plated If the thickness is 0.86um, the electroplating meets the specification requirements; if the tensile strength of the purchased beryllium copper strip C172000 TM06 is less than 1000MPa, it is not good, because the relevant standards require that the tensile strength of the beryllium copper strip is higher than 1070Mpa (See also ASTM B 194)


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