CR2450

Button battery is popular with the public because of its unique advantages, which indicates that it is very convenient to use. What are the advantages of button battery?

Advantages of button battery:

1. Good conductivity

The application of button battery is usually in a dry environment, coexisting with corrosive chemicals or air borne pollutants, because its conductivity must be good, only its electrochemical properties are excellent, it can complete the task of power supply when coexisting with other metals, and the impact of other environments will not affect its working performance, Many battery packs use insulators or bronze to minimize the effects of these effects.

2. Long actual life

The long life expectancy of button battery products is one of its many advantages, which is why it can replace other batteries. Of course, its long life is due to the durability of its battery box. Therefore, attention should be paid to the selection and application of battery boxes. If the life of the battery box is affected by the wear caused by the battery addition and removal process, this problem will further aggravate the problem of button battery. Therefore, please search the number of times the button battery box has been tested for recycling. The battery box should be guaranteed.

3. High cost performance

The conductivity of button battery is very good. Adding some favorable metals can not only ensure the power supply performance, but also improve its cost performance. Therefore, many manufacturers will use this packaging method to produce button batteries. And the addition of metal gold may cause unexpected additional advantages, because they have relatively large friction, thus reducing the force when inserting. Although the shell and contact shape are the main sources of force during insertion, when all other factors are similar, the force required for similar materials is greater than that for tin and copper.

Battery model: lithium battery, lithium manganese button battery, silver oxygen button battery, alkaline manganese circular battery, alkaline manganese button battery, zinc carbon circular battery, zinc air button battery, MnO2 button battery, nickel cadmium battery, nickel hydrogen battery, lithium ion battery.

Voltage: 12V, 6V, 3V, 1.55V, 1.5V, 1.5V, 1.5V, 1.4V, 1.35V, 1.2V, 3.6V.

Application fields: automobiles, commercial vehicles, motorcycles, cameras, pocket calculators, watch remote control devices, watches, small clocks, portable video devices, camera games, pocket calculators, electric equipment, alarm flash toys, hearing aids, hearing aid cameras, electric tools, portable cameras, mobile phones, cordless phones, mobile toys, emergency lights, electric bicycles, mobile phones, cordless phones, portable cameras, laptops Emergency lights, household appliances, mobile phones and laptops.

What if the button battery leaks?

Also known as button type battery, it refers to a battery whose overall dimension is like a small button. Generally speaking, it has a larger diameter and a thinner thickness. Button battery is classified into columnar battery, square battery and special-shaped battery according to its shape, and can be divided into silver oxide battery, lithium battery, alkaline manganese battery, etc. from the material. We should all have experienced the leakage of the button battery. What should we do in this case?

We should first understand the leakage of button battery from the battery materials. The zinc manganese dry battery is called button battery. It should not leak if it is not used for a long time, unless it is an acid battery. If it is an acid battery, it is better not to touch or smell it if it leaks, but to handle it with a paper towel. It mainly depends on the place where the battery is stored. If it is dry, it is OK. To be on the safe side, it is better to take it down with a paper towel and throw it into the trash can to replace it with a new battery.

In principle, the button battery itself will not undergo chemical reaction, but in fact it has a shelf life, that is, chemical changes are occurring, but the speed is relatively slow. The button battery generally does not leak, but the lead battery will leak. It is a strong acid, which must not be touched, and it is better not to smell it (although the main component is sulfuric acid). It is OK to neutralize it with lye. If you touch your hand, immediately wash it with plenty of water, and then apply soap.

The main component of the paste is ammonium chloride, which is equivalent to the dilute sulfuric acid solution of a voltaic cell. The role of zinc chloride in the paste is to increase the concentration of zinc ions in the solution, ease the corrosion of ammonium chloride on the zinc cylinder, and extend the service life of the battery.

With the development of science and technology, the demand and application of button batteries are more and more, and the types of button batteries are more and more classified. The volume of button batteries is smaller and smaller according to different application ranges, so the applied batteries are smaller and smaller. How should we choose this small button battery?

1、 RTC circuit

RTC circuit usually refers to clock circuit, which is used to save memory and clock memory function when electronic products are powered off. At present, the power consumption of RTC chip has been very low. In March 2013, NXP Semiconductor Co., Ltd. has developed a 100 millimicroamp (0.1 microamp) RTC chip; Take the high-capacity CR2032 battery produced by buttons as an example. One battery has a capacity of 230 mAh, which means that it can work for 2.3 million hours. Of course, the calculation of this time is only a theoretical value. In practical work, we should take into account many factors, such as the storage performance of the battery and other power consumption of the circuit. Mainstream RTC circuits in the market, such as PC computers and industrial control boards, consume about 2-10 microamps. A CR2032 high-capacity battery can also support 230000 to 230000 hours

2、 LED products

The output current of LED products is large. Due to the working principle of LED, the output current can vary from 5-20 mA, so the requirements for the polarity reaction and load resistance of the battery are high. Through adjusting the positive and negative pole formula of the battery, buttons have been developed to extend the working life of button batteries by controlling the current output and increasing the load resistance of the voltage, which is twice the life of ordinary 210mAh batteries.

3、 Smart Card

Smart cards are mainly used in the field of RFID and radio frequency cards. The requirements for button batteries are mainly reflected in: first, thin, second, high capacity, and third, small self discharge; At present, the thinnest button battery can be 1.2 mm thick. At present, the better imported button battery brands include Panasonic Panasonic button battery, Maxell Wansheng button battery and muRata Murata button battery. The average annual self discharge rate is controlled within 1%, which basically meets the needs of most RFID, smart electronic labels and other button batteries.

4、 Brand selection

Panasonic Panasonic Battery, Maxell Wansheng Battery and muRata Murata Battery are among the top brands in the world. Their quality is highly recognized at home and abroad, and their popularity is worldwide. Lithium manganese battery is the most widely used lithium button battery (originally called mercury battery, which has been gradually replaced by lithium manganese formula due to pollution and capacitance). The basic voltage is 3.0V

Button battery refers to the battery that looks like a button, but it is actually a lithium battery. Lithium is the lightest metal, so lithium battery has the advantages of light weight, durability, high stability and lasting power. The disadvantages are small power consumption and high cost. Therefore, its use is limited to precision instruments.

Button battery is also a common battery. It is small and has many models. According to chemical composition, common button batteries include carbon, alkaline, zinc silver oxide, zinc air, lithium manganese dioxide, nickel cadmium rechargeable button battery, nickel hydrogen rechargeable button battery, etc. According to the shape, there is a distinction between monomer and stack.

Carbon button batteries are the most common and cheapest. Alkaline batteries are more expensive, but they discharge well. It is widely used in calculators, electronic toys, hearing aids, lighters, watches, etc.

The button type lithium manganese dioxide battery has the characteristics of 3V working voltage, small size, light weight and wide working temperature range. In addition to watches and calculators, it is mainly used for memory backup and is widely used in various electronic products.

It can be used as the most ideal battery for memory backup to display the stable working voltage during long-term low load discharge. High energy density, at 3V (rated voltage), twice the voltage of alkaline button battery and silver oxide battery. It uses highly conductive electrolyte to reduce internal resistance and provide stable operating voltage, so the operating voltage changes very little at room temperature, low temperature or high temperature.

Maxell Company of Japan has introduced coin type lithium manganese rechargeable battery - ML series battery. This series of batteries use specially treated manganese dioxide as the cathode material, lithium aluminum compounds as the cathode material, and specially prepared organic electrolytes, which have excellent discharge characteristics, excellent leakage resistance, and low self discharge rate. It can also provide stable discharge characteristics after charging for one year at 20 ℃ (3.3V). The annual self discharge capacity shall not exceed 2% at 20 ℃. After being stored at 20 ℃ for about five years, it still retains about 95% of its electricity.

There are two types of ML series batteries, ML2032 and ML2016. The rated voltage of this series of batteries is about 2.5V, twice that of nickel cadmium rechargeable batteries. They can work stably in a wide temperature range of - 20 ℃~60 ℃. As shown in Figure 1, they are mainly applicable to fax machines, copiers, printers, computers, PDAs, video cameras, digital cameras, portable CD/MD players, watches, medical instruments, cash registers, FA instruments, measuring instruments, on-board microcomputers, sensors, electricity meters, etc.

Main features of ML series coin type lithium manganese rechargeable battery:

• About 2.5V working voltage

• Excellent charging/discharging characteristics

• Stable operation in a wide temperature range of - 20 ℃~60 ℃

• Low self discharge and excellent leakage resistance

• Excellent floating characteristics

• Excellent high rate discharge characteristics

• UL certified

Typical application of ML series battery:

• Mobile phone

• PHS

• OA machine (fax machine, copier, printer)

• Laptop

• Desktop PC

• PDA

• Camera

• Digital camera

• Portable CD/MD player

• Watches

• Medical instruments, cash registers

• FA instruments (measuring instruments, on-board microcomputers, sensors)

• Electronic watches (water, gas, electricity)

One is for products, the other is for batteries. The standards are different, and the content of the test is less than the battery directive. In addition, the limits are different. The 2006/66/EC certification, button battery directive report, battery 2006/66/EC report, nickel hydrogen battery directive certification, how much the 2006/66/EC certification costs, button battery directive testing agency, what the battery directive is, battery pack battery directive, nickel hydrogen battery directive certification, Battery Directive 2006/66/EC, what is the certification of lead-acid battery Battery Directive, and what is the battery directive. On December 10, 2013, the European Union published the Directive 2013/56/EU on canceling the cadmium exemption of wireless electric tool batteries and prohibiting button batteries from containing mercury in its official bulletin. RoHS certification can be searched by Baidu for "Environmental Test".