1. The characteristics of the two are different:
1. Characteristics of lithium batteries:
(1) High energy density: the weight of lithium-ion. batteries have the same capacity Half of the nickel-cadmium or nickel-metal hydride battery, the volume is 20-30% nickel-cadmium and 35-50% nickel-hydrogen.
(2) High voltage: The operating voltage of a lithium-ion battery cell is 3.7V (on average), which is equivalent to three nickel-cadmium or nickel-hydride batteries metal connected in series.
(3) Pollution-free: Lithium-ion batteries do not contain harmful metal substances such as cadmium, lead and mercury.
(4) Contains no lithium metal: Lithium-ion batteries do not contain lithium metal, so they are not subject to air transport restrictions such as the ban on transporting lithium batteries inpassenger planes.
2. Characteristics of lead-acid batteries:
(1) Safety seal: During normal operation, electrolyte will not leak from the battery terminals or case. No free acid; Special absorbent separators keep the acid inside and there is no free acid inside the battery, so the battery can be placed anywhere.
(2) Ventilation system: When the internal pressure of the battery exceeds the normal level, the VRLA battery will release excess gas and automatically close to ensure that there is no excess gas in the battery.
(3) Simple Maintenance: Since the gas composite system converts the generated gas into water, there is no need to add water when using VRLA batteries.
(4) Long life: VRLA battery uses lead-calcium alloy fence with anti-corrosion structure and can be charged for 10-15 years.
2. The materials of the two are different:
1. Lithium battery materials: Metal batteries generally use manganese dioxide as the positive electrode material and lithium metal or its metal alloy as the material. Negative electrode material, batteries using non-aqueous electrolyte solutions.
2. Lead Acid Battery Materials: Mainly consisting of lead and its oxides, the electrolyte is a battery in sulfuric acid solution. In the discharged state of a lead-acid battery, the main component of the positive electrode is lead dioxide and the main component of the negative electrode is lead; in the charged state, the main components of the positive and negative electrodes are both lead; sulfate.
3. Precautions for using both:
1. Precautions for using lithium batteries: After the new battery is put into use, it mustit be charged and discharged regularly. The purpose of charging is to store electrical energy in the battery and restore its capacity in a timely manner to meet the needs of electrical equipment. The purpose of discharge is to test the battery capacity parameters in a timely manner and promote the activation reaction of the active materials of the electrodes.
Battery charging and discharging conditions will directly affect the electrical performance and battery life. There are many methods for charging batteries. Choosing a scientific and reasonable charging method will greatly improve the maintenance effect of the battery.
2. Precautions for using lead-acid batteries: In an environment with a temperature of 20±5℃ and humidity not exceeding 50%, air and water vapor should be avoided during transportation to corrode the lead-acid battery sheet. aluminum.
Baidu Encyclopedia-Lithium Battery
Baidu Encyclopedia-Lead Acid Battery
What we doWhat do you know about lithium polymer batteries?
1. The first 3-5 times of charging are generally called the adjustment period and should be charged for more than 14 hours to ensure full activation of lithium ion activity. Lithium-ion batteries do not have a memory effect, but have high inertia. They must be fully enabled to ensure optimal performance for future use. 2. Before the battery leaves the factory, the manufacturer has activated and precharged it, so the battery has residual power. Some friends said that the battery is charged according to the adjustment period, but the standby is still seriously insufficient. The battery is indeed a genuine battery, in this case, the adjustment period should be extended then fully charged and discharged 3-5 times (it is recommendedmmanded that the lithium battery also be discharged during the adjustment period. The method is to put in the mobile phone without making calls until it turns off automatically. If the local network or location consumes a lot of power, then remove the SIM card and turn on the phone until it turns off). 3. If the battery still does not meet the standard after use, the charging current may not be enough to fully activate the battery (commonly known as non-charging or unsaturated charging). This may be due to leaving it unused. too long or does not work in factory Due to sufficient activation (activation) processing, it is better for you to go to the mobile phone maintenance department at that time and ask for activation (or ask for a “counter). current" to activate the battery); friends who know electricity can alsoif do it themselves. Use a DC voltage regulator to adjust the voltage to 5-6 V and the current to 500-600 mA and connect the battery in reverse. Note that you can release it as soon as you touch it and repeat up to three times. After this process, use the "original travel charger" to charge during the "adjustment period". Generally speaking, after such treatment, there should be no problems with the cell phone battery. Please note that as many cell phone brands now only come with original travel chargers, friends, try to use the original charger when charging during the "adjustment period". After the adjustment period, if necessary, use a reliable “stand charger”. . Since lithium batteries are more sensitive to current and voltage during the adjustment period, non-original chargers may be more conservative interms "peak" current, causing a "misunderstanding" (commonly called mismatch) with the lithium battery's protection circuit, which may also result in an inability to fully charge. 4. Depending on the battery type and capacity, the battery charging time is approximately 1.5-6 hours and should not exceed 24 hours. 5. Battery life depends on the number of repeated charges and discharges. So you should try to avoid charging when the battery has residual power, which will shorten its lifespan. When the mobile phone is turned off for more than 7 days, the mobile phone battery should be completely discharged and fully charged before use. 6. The nickel-cadmium (NiCd) battery must be completely discharged before recharging, and the battery must be fully charged after recharging. In addition, from the perspective of environmental protection, phone batteries pUsed ortables should be recycled and should not be thrown away randomly. Abroad, the recycling of mobile phone batteries must comply with the recycling plan established between the government and battery manufacturers. In China, there is no recycling system for mobile phone batteries.
According to the different electrolytic materials used in lithium-ion batteries, lithium-ion batteries are divided into liquid lithium-ion batteries (Liquified Lithium-Ion Batbatterie, called LIB) and polymer lithium-ion battery (Polymer Lithium-Ion Battery, called PLB). The positive and negative electrode materials used in polymer lithium ion batteries are the same as liquid lithium ions. Positive electrode materials are divided into lithium cobalt oxide, lithium manganate, ternary materials and lithium iron phosphate materials. The principle of operation of the battery is also basic. The main difference between them is the electrolyte. Liquid lithium-ion batteries use liquid electrolytes, while lithium-ion polymer batteries use solid polymer electrolytes instead. This polymer can be “dry” or “colloidal”. Currently, most of them use colloidal polymer electrolytes. . Classification: Solid polymer electrolyte lithium-ion battery electrolyte is a mixture of polymer and salt. This type of battery has low ionic conductivity at room temperature and can be used at room temperature. Gel polymer electrolyte lithium-ion batteries add additives such as plasticizers to the solid polymer electrolyte to increase ionic conductivity and allow the battery to be used at room temperature.
Lithium-ion batteries with polymer cathode materials use conductive polymers as cathode materialsdiscs, and their specific capacity is relatively increased. Since the liquid electrolyte is replaced by solid electrolyte, compared with the liquid lithium ion battery, the polymer lithium ion battery has the advantages of being thinner, of any surface and of any size. what form. Therefore, the battery case can be made of aluminum. -plastic composite film, so it can improve the specific capacity of the whole battery; polymer lithium-ion batteries can also use polymers as cathode materials, and their specific mass energy will be more than 20% higher than that of current liquid lithium-ion batteries. . Lithium-ion polymer batteries have the characteristics of miniaturization, thinness and lightness. Therefore, polymer batteries will gradually increase their market share. Precautions, pay attention to short circuit conditions: lithium batteriesum-ion polymer are prone to short circuit conditions during the charging process. Including: internal short circuit, external short circuit, etc. Although most lithium-ion batteries now have short circuit protection circuits and explosion-proof wires, in many cases this protection circuit may not work under various circumstances, and the role of explosion-proof wires is also very limited. Don't overcharge: Lithium-ion polymer batteries are more likely to expand if charged too long. The chemical properties of lithium are very active and easy to burn. As the battery is charged and discharged, the inside of the battery continues to heat up. The gas generated during the activation process expands and the internal pressure of the battery increases. the pressure reaches a certain level, if the outer shell is damaged, it will rupture, causing leakage, fireie or even an explosion. And lithium-ion polymer batteries are only getting bigger.
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