Customizing accessory
Formation is the decisive step in the third and final phase of manufacturing lithium-ion batteries: once all components have been manufactured, assembled and packaged, the battery is charged and discharged in a controlled manner for the first time. As the currents gradually increase, a boundary layer forms between the anode and the electrolyte, known as the solid electrolyte interphase layer, or SEI layer for short.
This process can take up to 24 hours and is crucial for both the electrochemical quality and the performance of the battery. Cell manufacturers therefore invest considerable resources in optimising the formation process - especially for large automotive batteries that require high currents.
Precise components from a single source
Here we present some key components for the customization of your test fixtures:
Test probes
Spring-loaded probes (GKS) are the basis for reliable and efficient contacting. INGUN offers the world's largest portfolio of GKS – which vary in terms of size, spring force, tip style, and functionality. All spring-loaded probes transmit electrical signals and work according to a similar principle with a spring-loaded plunger and recommended working stroke.
Push rods
Push rods (NHS) are used to hold PCBs securely in place against the force of the installed probes during contacting in the test fixture. They are mounted in the pressure frame plate and are renowned for simple installation as well as high durability. Push rods are available in rigid or spring-loaded versions, each with variable length and tip diameter. Each delivery includes fixing screws or barrels.
Side approach mechanisms
Side approach mechanisms (SAM) are used for reliable contacting of connectors or test points that require a lateral contact stroke. Depending on the version, the stroke is actuated manually or pneumatically by the fixture. SAMs differ in terms of the maximum stroke, the contact force, and the accessories supplied.
Interface blocks
Interface blocks (SB) ensure reliable signal transmission between the test device and the test system. Depending on the model, they can transmit voltage, high-current and high-frequency signals as well as fibre optics, compressed air, and digital data. Mixing blocks combine several functions, such as high current and compressed air or high current and optical fibre.
Signals are transmitted via two interface blocks mounted opposite each other: One is equipped with spring-loaded probes, the other with rigid contact terminals or couplings. This configuration ensures consistently high contact quality and reliable signal transmission with minimal contact resistance. Interface blocks are available in numerous versions and with a wide range of accessories. We also offer specialized blocks for mounting common interfaces such as pole terminals, D-Sub sockets, USB and RJ45 connections on the DUT side.
Even more customizing accessories - online and in the catalogue
Discover numerous other components that support you when customizing your test fixture. Visit our website or take a look at our catalogue - we look forward to hearing from you!
To the online shop Test Fixtures Catalogue 14.1 EN (PDF 20 MB)