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Application analysis of ITECH products in medical pacemaker testing

Posted by: Cnc Machining China 2022-11-09 Comments Off on Application analysis of ITECH products in medical pacemaker testing

A pacemaker is an Electronic therapy device implanted in the body. It generates electrical pulses powered by batteries through a pulse generator. Through the conduction of lead electrodes, it stimulates the myocardium in contact with the electrodes to excite and contract the heart, so as to achieve treatment. The purpose of cardiac dysfunction due to certain cardiac arrhythmias.

The pacemaker is mainly composed of a power source (that is, a battery, now mainly using a lithium-iodine battery) and an electronic circuit, which can generate and output electrical pulses.

ITECH can provide professional testing solutions for medical electronic equipment. For the testing of battery packs in medical pacemakers, our company has DC power supply, DC electronic load, battery internal resistance tester, battery test system and other high-tech Performance products are available.

Battery capacity is usually measured in ampere-hours. The calculated battery capacity values ​​at different discharge rates will also be different. Usually high current discharge will shorten the life of the battery, so the battery capacity is generally discharged at a small rate (such as 0.2C). At the same time, deep discharge will damage the battery. The calculation of battery capacity is relative to a cut-off voltage. The discharge capacity from the initial voltage to the safe cut-off voltage is the effective capacity value of the battery.

As the number of charge and discharge increases, the internal resistance increases due to internal oxidation, which will make the battery unable to release the stored power and gradually end its life. The cycle life of the battery (one charge and one discharge is called one cycle) is affected by factors such as discharge rate, temperature and charge-discharge cut-off voltage. Lithium batteries can generally be charged and discharged 300 to 500 times. For example, IEC stipulates that the standard cycle life standard of lithium batteries is that the capacity should be more than 60% of the initial capacity after repeated cycles of 500 times. Therefore, passing the cyclic charge-discharge test is an important way to evaluate the life cycle of various types of batteries.

The internal resistance value of the battery is related to the discharge capacity of the battery. ITECH provides battery AC internal resistance and DC internal resistance measurement functions. The AC internal resistance is equipped with a special AC internal resistance tester, and a 1KHz excitation signal is applied to both ends of the battery to measure the internal resistance value of the battery under static conditions. However, in the actual use of the battery, it also includes the polarization internal resistance, the impedance of the connection point, etc. The DC impedance test can more intuitively reflect the resistance value in the continuous application of the battery.

Users can choose different charging and discharging modes. The ITS5300 test system software supports multiple discharging modes such as CC/CW/CR, and can simulate two charging modes of constant voltage and constant current.

Rich stop conditions can effectively help users improve the safety of the test and avoid overcharging and overdischarging of the battery. The logical relationship of “AND” and “OR” can be realized between stop conditions such as time, capacity, and voltage to meet more complex test requirements.

ITECH ITS5300 battery charge and discharge test system provides users with test solutions ranging from mA-level single cells to MW-level battery packs. In response to the large-scale testing requirements of the production line, the ITS5300 can perform performance testing on hundreds of independent battery modules/cells at the same time, improving the testing efficiency and output of the production line. At the same time, it provides a wealth of test steps and statistical analysis functions, and the channels can run synchronously/independently without affecting each other.

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