Identification of the nickel metal hydride battery, charging and maintenance

Source: 2020 - 04 - 02 giving hits: in general, rechargeable batteries, Nickel metal hydride battery, nickel metal hydride batteries, lithium ion battery) The actual discharge capacity depends on the charge and discharge mechanism. Charge and discharge current and termination voltage is different, the actual capacity is different also, in order to measure different battery charge and discharge performance, often using the same charge and discharge mechanism ( Multiplier) The comparison. Charge and discharge ratio = charge and discharge current/rated capacity. Battery discharge rate generally includes 0. 1 c, 0。 2 c, 1。 0 c, etc. , usually with 0. 2 c multiplier to measure. In general, the higher the multiplier, the discharge current, the greater the battery polarization more serious, the less actual discharge. Know the charge and discharge ratio, we can explain the identification methods of nickel metal hydride batteries because in IEC standard, nickel metal hydride batteries and nickel-metal hydride batteries always go together, so we put them together here. One, according to the IEC standard, nickel cadmium/nickel metal hydride rechargeable battery logo is made up of five parts. 1. Battery type: KR for nickel cadmium battery, HF square nimh batteries, HR for cylindrical ni-mh battery. 2. Cell size: including circular diameter and height of the battery; A square height, width and thickness of the battery. Value is an unit with the mm with slash separators. 3. Discharge characteristic symbol: L said suitable discharge current multiplier in 0. 5 c within; M says proper discharge current multiplier in 0. 5 - 3. Between 5 c. H says proper discharge current multiplier in 3. 5 - 7. Between 0 c. X represents the battery can be in 7 c - 15 c high power electric work flow. 4. High temperature battery symbol: in T. 5. Battery connector symbol: CF for connectionless joint; HH said a battery type belt tensioning series connection of the connector; HB said a side by side series battery connector. Such as: 1. Hf18/07/49 for square nimh batteries, 18 mm wide, 7 mm thick, high 49 mm; 2. Krmt33/62 cf is refers to the nickel cadmium battery, discharge rate at 0. 5 c - 3. Between 5, high temperature series single battery, no connection piece, 33 mm in diameter, height 62 mm. Second, the nimh battery discharge state ( The charging status) The factory, before using 0. 1 ℃ multiplier current ( Constant current charging) Charging can use 12 to 14 hours. New or unused nimh batteries need a 'activate' time to restore the battery. As a result, some new nickel metal hydride batteries need to go through several charge-discharge cycles to reach them in the name of the charge. In the daily use process, each time to discharge and charge, so as to guarantee the battery life, usually do not overcharge, also do not need to discharge a long time to save. Because the nimh batteries have memory effect, unlike the lithium battery, it can charge at any time. Iii. For the long-term maintenance of nimh batteries, low frequency pulse high current charging mode more than a trickle charge mode is conducive to the maintenance of battery status.