A battery compartment is one or more compartments or chambers for holding the battery. For dry cells, the holder must also make electrical contact with the battery terminal. For wet cells, cables are often connected to battery terminals, such as those found in automobile or emergency lighting equipment.
The battery holder is a plastic box with a housing shape formed as a compartment or compartment that receives a battery or battery, or a separate plastic holder fitted with screws, eyelets, glue, double-sided tape, or other means.. The battery holder may have a cover to secure and protect the battery or may be sealed to prevent damage to circuits and components from battery leaks. A circular spiral wire or flat tab suppressing the battery terminals are the two most common methods for making electrical connections inside a stand. External connections on the battery holder are usually made by contact with pins, surface of the foot of the mountain, soldering lugs, or lead wire.
Where the battery is expected to last for the lifetime of the product, no holder is required, and the tab welded to the battery terminal can be directly soldered to the printed circuit board.
Video Battery holder
Histori
In the late 1800s patents were issued for consumer products such as flashlights; patent no. 617592 dated March 1898 is for an early metal flashlight which receives a D battery.
Some early 1900 battery holders are often nothing more than cardboard boxes with copper contacts. In the 1920s, the battery holders used a twin metal clip (like a fuse holder) to hold the battery in place while making electrical contact. Patent no. 1439429 was awarded in December 1922 for assembly with two spring arm clips, a small switch and an assembly lamp on the other end of the connected cable.
The introduction of polypropylene in 1950 and miniature batteries by Eveready allows the use of small plastic battery holders. This is still common in toys, decorations, and items that light up or blink. In 1957, electric watches gained popularity with the public.
The battery holder is developed in parallel with the battery over time; because the size of the battery pack shrinks as well as the holder. In the 1980s, the first circuit board installing lithium coin cell batteries appeared in patent no. 4487820 by manufacturer of MPD battery holder.
The electronics industry now uses many lithium battery stands or sockets. CR2/3A, CR1/2AA and CR123A batteries started in camera applications, but expanded into new markets such as alarm systems, handheld computers, and keyfobs.
Maps Battery holder
Design considerations
The design of the battery holder requires knowledge of how and where larger products will be used. Human factors to consider include the ease of battery exchange, the age range and physical condition of the intended users. These elements should be considered in order for the design to be successful and part of the design process. A designer must choose between a cradle of battery formed into the product case or made as a separate part. For many products, product safety rules and standards affect battery selection.
Most current battery holders are made with a polypropylene or nylon body with a value of 80-100 Â ° C. The lithium coin cell holders are made with high temperature PBT, nylon or LCP bodies as they are usually circuit boards installed and require wave soldering at 180-240 Â ° C or solder reflow at 260-300 Â ° C.
Battery contact is the most important part of the design and requires serious consideration. Due to nickel-plated batteries, it is recommended that nickel-plated contacts to prevent galvanic corrosion between different metals. The battery contact can be a fixed contact, a flexible contact, or a combination of both.
Contacts remain cheap but are vulnerable to loss of electrical connections. The combination of fixed and flexible contacts is a better solution, but it is subject to open circuits as the movement moves away from the fixed position; Spring contact presses and allows the battery to stay away from fixed contacts. Flexible contacts allow for slight expansion of cells when discharged, as the volume of internal chemicals increases. Flexible contact with multiple fingers touching the anode and cathode allows movement in many directions without loss of electrical connection.
Features like polarity, or reverse battery, protection can be part of the design. Contacts for the anode side can be hidden behind the plastic and receive a common nub battery on alkaline batteries. Another method is a plastic channel to receive post battery or terminal. In July 2010, Microsoft announced plans to partner with several other companies, including Duracell and MPD, to capitalize on its patents. 2007/0275299 A1, which is a new type of polarity protection in which batteries can be inserted into the battery holder in a good orientation and still operate properly. Although other technologies exist that can do this, they are expensive or cause a passive energy drain on batteries, while these solutions are purely mechanical and affordable to produce.
A 9-volt battery type has a snap-on contact.
The battery holders for zinc-air batteries do not have to be completely airtight because about 1 liter of air is required per ampere-hour discharge per cell. The battery holder may include a valve integrated with the device's power switch to allow air to enter when the device is turned on.
See also
- Battery Nomenclature
- Battery terminal, alternative method to connect battery
- Alkaline
- Alkaline battery
- ANN connectors
- Lithium
- Lithium battery
- List of battery sizes
Note
References
- Survival of the Fittest | News Electronic Components, August 21, 2009
- Choosing a Battery Holder | Hearst Electronic Products, October 2009
- Battery Holder Taking Beating! Wireless Design & amp; Development
- Battery Holders Adapt For Hand Held Device Needs | Medical Design Technology Magazine
- Battery Retention is designed for your design | Medical Design Magazine
- Electronic Packaging, Microelectronics, and Interconnect Dictionary By Charle A. Harper & amp; Martin B. Miller
- IEEE Global History Network
- Collecting Flashlights by Stuart Schneider.
- Radio Service Elements by Marcus & amp; Retribution.
- Battery In The Portable World by Isidor Buchmann.
- Instaload Press Release
External links
- Battery Holders.org
- Measuring Battery using Right Settings This application note discusses the difference between 2-point and 4-point battery measurements.
Source of the article : Wikipedia
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