ALLPCB
A pacemaker is an implantable electronic therapeutic device that generates electrical pulses powered by a battery. These pulses are conducted via lead electrodes to stimulate the myocardium, causing cardiac excitation and contraction to treat cardiac dysfunctions caused by certain arrhythmias.
A pacemaker consists mainly of a power source (i.e., a battery, currently commonly lithium-iodine batteries) and electronic circuitry that generate and output the electrical pulses.
Battery capacity testing
Battery capacity is usually expressed in ampere-hours (Ah). Capacity values depend on the discharge rate. High-current discharge accelerates aging, so capacity is typically measured at low rates (for example, 0.2C). Deep discharge can damage the battery; capacity is defined relative to a cutoff voltage. The discharged capacity between the initial voltage and the safe cutoff voltage is the effective capacity.
Battery lifetime testing
With repeated charge and discharge cycles, internal resistance increases due to internal oxidation, which reduces the battery's ability to deliver stored energy and eventually ends its useful life. Cycle life (one charge plus one discharge equals one cycle) is affected by discharge rate, temperature, charge/discharge cutoff voltages, and other factors. Lithium batteries typically withstand about 300 to 500 cycles. For example, IEC standards specify that after 500 repeated cycles, capacity should remain above 60% of the initial capacity. Therefore, cycle charge-discharge testing is an important method for evaluating battery lifespan.
Battery internal resistance testing
Internal resistance affects a battery's discharge capability: higher internal resistance reduces allowable charge/discharge rates and can cause heating. ITECH instruments provide AC and DC internal resistance measurement. AC internal resistance measurement uses a dedicated AC IR tester that applies a 1 kHz excitation signal across the battery terminals to measure the static internal resistance. In real applications, polarization resistance and contact impedances also contribute; DC impedance testing can more directly reflect resistance during continuous operation.
Flexible step editing and stop conditions
Different charge and discharge modes can be selected. ITS5300 test system software supports CC, CW, CR and other discharge modes, and can simulate constant-voltage and constant-current charging modes.
Comprehensive stop conditions help improve test safety and avoid overcharge and overdischarge. Logical "AND"/"OR" relationships can be configured among stop conditions such as time, capacity, and voltage to meet more complex test requirements.
The ITECH ITS5300 battery charge-discharge test system supports testing single cells at the mAh level up to battery packs at the MW level. For high-volume production testing, the ITS5300 can perform performance testing on hundreds of independent battery modules or cells simultaneously, enabling high-throughput testing. The system also provides extensive test-step configuration and statistical analysis functions, with channels able to run synchronously or independently without mutual interference.
