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Varta 63094, Technical Handbook

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Varta 63094 Technical Handbook Download Page 24

COINPOWER | 24

6.1  Safety Tests  

25

6.2  Product Safety 

26

6.3  Protection Circuit Module (PCM) 

29

6. Safety

Product safety has always been a very important 
consideration for VARTA Microbattery. Besides all the 
technical features which give its high performance, the 
CoinPower series also provides the highest safety level 
in the market for small Lithium rechargeable batteries.  
In the following sections is more information about 
various safety features of the CoinPower series.

Summary of Contents for 63094

Page 1: ...www varta ag com explore A4 Technical Handbook CoinPower Rechargeable Li Ion Button Cells Generation A4 ...

Page 2: ...___________________________________________________ 24 6 1 Safety Tests _________________________________________________ 25 6 2 Product Safety _______________________________________________ 26 6 3 Protection Circuit Module PCM ________________________________ 29 7 HANDLING PRECAUTIONS AND PROHIBITIONS ___________________ 30 7 1 General Information __________________________________________ 31 7 ...

Page 3: ...INPOWER 3 1 General Information 1 1 Definitions 5 1 2 Features 6 1 3 Applications 7 1 4 General design and application criteria 8 1 5 Construction and electro mechanical processes of CoinPower Batteries 9 ...

Page 4: ... product types VARTA Microbattery produces all major chemistries in various form factors We are fully equipped to produce customized batteries We are confident that we can provide an optimized battery solution for most application requirements Product Highlights of VARTA CoinPower Batteries 6 patented innovations Capacity from 29 mAh to 155 mAh Low internal resistance For discharge currents up to ...

Page 5: ...eached Nominal Capacity The nominal capacity C denotes the energy amount in mAh milli Ampère hours that the cell can deliver at the 5 hour discharge rate 0 2 CA The reference temperature is 20ºC 2ºC and the final discharge voltage is 3 0 V Typical Capacity The typical capacity is the average capacity at a discharge rate of 0 1 CA to a final discharge voltage of 3 0 V Available Capacity Li Ion cell...

Page 6: ...or Feature High energy density Wound electrode design Built in safety device with chemical safety components Fully automated production in Germany Worldwide branch offices with technical support Advantage Lightweight and small size High discharge currents The market s best safety performance High reliability and consistent quality Close customer relationship Customer Benefit Best performance and l...

Page 7: ...es Wearable Technology Smart Car Keys and many more These cells are the ultimate power source for your electronic devices and make your products smaller lighter and more attractive VARTA CoinPower provides outstanding performance and reliability excellent quality along with very safe operation 1 3 Applications COINPOWER GENERAL INFORMATION IOT Wearables Smart Home Medical Automotive ...

Page 8: ...roperties Available space Environmental conditions You can choose a cell from the VARTA CoinPower range to operate within the following limits Operating Voltage 3 0 V 4 3 V Capacity 29 mAh to 155 mAh Height 4 0mm 5 0mm and 5 4mm Diameter 9 4mm 12 1mm 14 1mm 16 1mm VARTA Microbattery s professional design in team available worldwide will be happy to assist you with further recommendations and will ...

Page 9: ...side the cell for energy storing material This is why the energy density of the CoinPower batteries is one of the highest of any cell in this small form factor In Li Ion batteries such as in the CoinPower cells Lithium Ions move from the anode to the cathode during discharge and from the cathode to the anode when charging Aluminum and copper are used for the positive and negative current collector...

Page 10: ...COINPOWER 10 2 Miscellaneous 2 1 Specification table VARTA CoinPower Batteries 11 2 2 Data Matrix Code 13 ...

Page 11: ... Rechargeable Button Cells Li Ion CoinPower TYPE DESIGNATION TYPE NO VOLTAGE V CAPACITY mAh DIAMETER mm HEIGHT mm WEIGHT g Main types CP 1654 A4 63165 3 7 155 16 1 5 4 3 2 CP 1454 A4 63145 3 7 114 14 1 5 4 2 4 CP 1254 A4 63125 3 7 77 12 1 5 4 1 6 CP 1250 A4 63121 3 7 62 12 1 5 0 1 6 CP 1240 A4 63124 3 7 55 12 1 4 0 1 2 Special types CP 9454 A4 63095 3 7 41 9 4 5 4 1 0 CP 9440 A4 63094 3 7 29 9 4 4...

Page 12: ...se letters and a figure consisting of four digits The version number consists of one letter and one figure as shown in the example Model Number CP1654 A4 Battery Type CP CoinPower Cell Height here 5 4 mm Cell Diameter here 16 mm Version COINPOWER MISCELLANEOUS ...

Page 13: ...ine Please note that the codes are printed on every individual cell produced in Germany The battery code is different and is indicated on the battery drawing COINPOWER MISCELLANEOUS 0123789ABC1254A401 Year 2020 0 2021 1 Unique cell identification code Day of the year 01240740ABCD1254A401X Year Day of the year Data Matrix Code Data Matrix Code 2D Datamatrixcode CP1240 A4 CP1250 A4 CP1254 A4 CP1454 ...

Page 14: ...LLANEOUS 0123789ABC999 Year 2020 0 2021 1 Unique cell identification code Day of the year 0124010740 Year Version number VARTA Day of the year CPM Line ID Data Matrix Code Date Code 0124010740 2D Datamatrixcode CP9440 A4 CP9454 A4 ...

Page 15: ...COINPOWER 15 3 1 Charging 16 3 2 Discharging 18 3 3 Charging IC 19 3 Charging and Discharging ...

Page 16: ... in the datasheet regarding capacity and cycle life may decrease Rapid Charging Furthermore the A4 Version can be rapid charged with a two step procedure A charging rate of 2C can be applied up to max 4 0 V then continue with standard rate of 0 5C or fast rate of 1C until 4 3 V The charging voltages should be controlled within tolerances of 50 mV The charging procedure must be Constant Current Con...

Page 17: ... Current Constant Voltage CCCV Fast Charging The CoinPower A4 Version can be fast charged with a maximum C Rate of 1C over the entire temperature range between 15ºC and 45ºC The charging procedure must be Constant Current Constant Voltage CCCV For this charging procedure the performance stated in the datasheet regarding capacity and cycle life may decrease Charging Procedures Comparison An overvie...

Page 18: ...he charger shall be equipped with a device to control the recharging procedure as follows In case of over discharging the cell s should be charged with a low current 0 01 0 07 C for 15 30 minutes i e pre charging before standard charging starts Charging according to the data sheet should be started after the individual cell voltage has risen above about 3 0 V and within 15 30 minutes This timing c...

Page 19: ...ging rate is the maximum charging rate that the battery can tolerate without damaging the battery Special precautions are needed to maximize the charging rate and to ensure that the battery is fully charged while at the same time avoiding overcharging For this reason it is recommended that the charging method switches to constant voltage before the cell voltage reaches its upper limit Note that th...

Page 20: ...COINPOWER 20 4 Reliability and life expectancy ...

Page 21: ... 80 of its nominal value when new Even at elevated temperature and higher discharge currents the VARTA CoinPower cells show excellent performance This will provide extended battery life even after daily usage and in high consumption applications The graphs show the discharge performance of the CP1654 A4 For the other types the remaining capacity can be calculated by pro rata see y axis Reliability...

Page 22: ...COINPOWER 22 5 Storage ...

Page 23: ...ischarge rate Higher temperatures increase the rate of self discharge It is recommended to store the cell at a state of charge between 30 and 50 at room temperature 20 C or lower The graph below shows the storage characteristic of a CoinPower cell after 6 months of storage at 20 C and at 45 C When first going into storage the cells had an SoC of approximately 30 Since the self discharge rate of th...

Page 24: ... very important consideration for VARTA Microbattery Besides all the technical features which give its high performance the CoinPower series also provides the highest safety level in the market for small Lithium rechargeable batteries In the following sections is more information about various safety features of the CoinPower series ...

Page 25: ...safety standards which are applicable to rechargeable Lithium batteries Below are more details about the various safety tests which are performed to verify a battery s compliance with the requirements of each of the three standards VARTA Microbattery regularly performs additional safety tests in order to ensure the high safety level of the CoinPower series 6 1 Safety Tests NO TEST ITEM UL 1642 IEC...

Page 26: ...r very safe operation Safety features in the components used in the CoinPower battery as well as in its mechanical design ensure that the CoinPower cell will be safe even when subject to severe abuse conditions 6 2 Product Safety COINPOWER SAFETY ...

Page 27: ...rge discharge storage Current flows via CID Abusive Case during overcharging Cell is disconnected and save CID is in normal status Cup will move up due to internal pressure tag with CID is welded on cup inside Lifting force will tear off the CID and current flow is interrupted minus contact coil minus contact coil 6 2 1 CurrentInterruptionDe vice CID COINPOWER SAFETY ...

Page 28: ...y the foil gasket on the inside When subject to abuse e g continuous overcharging the lid will lift up and excessive pressure can be released through these holes This mechanism will prevent the cell from overheating and bursting when subject to severe overcharging normal state over pressure abusive case venting holes are covered venting holes are open pressure can be released COINPOWER SAFETY ...

Page 29: ...tection functions Over charge protection Over discharge protection Over current protection Short circuit protection Optional additional functions Over temperature protection ESD protection Code identification Power management Fuel gauge Safety Tests Recommended PCM for CoinPower Series SG Micro SGM41100V Ricoh R5613L Other suitable PCM Seiko S8211CAY S8200A Mitsumi MM3077 LY MM2511 K56 Texas Instr...

Page 30: ...ecautions and prohibitions for the VARTA CoinPower series If you have any questions regarding any point please consult your Key Account Manager 7 1 General Information 31 7 2 Charging 31 7 3 Discharging 32 7 4 Protection Circuit Module PCM 33 7 5 Application 33 7 6 Storage 34 7 7 Others issues 34 7 8 Marking 37 ...

Page 31: ...d handling of the cell if deemed necessary Do not modify and or open cells or batteries without prior written approval by VARTA Microbattery GmbH Current version available under www coinpower de Charging Current Charging current should not exceed maximum charge current specified in the Data Sheet Charging with higher current than recommended may cause damage to cell performance and safety features...

Page 32: ...l s battery pack shall start with a low current 0 01 0 07C for 15 30 minutes i e precharging before rapid charging starts The charging according to the Data Sheet shall be started after the individual cell voltage has risen above about 3 V within 15 30 minutes which can be determined and controlled by the use of an appropriate timer for precharging In case the individual cell voltage does not rise...

Page 33: ...able misuse conditions at temperatures up to 85ºC over 4 hours no safety risk occurs Technician Replaceable Appliances VARTA Lithium Ion batteries of type CoinPower do not fulfill the requirements for being User replaceable as the reverse polarity installation cannot be prevented Therefore the VARTA Lithium Ion batteries of Type CoinPower can be used only in devices where servicing of the battery ...

Page 34: ... and safety will be omitted Ultrasonic Welding of Application Housing Ultrasonic welding of plastic lid to the plastic casing can be applied However the welding shall be done avoiding the application of ultrasonic wave power directly to the cells Otherwise it may cause serious damage to the cells Prevention of Short Circuit in Application Enough insulation layer s between wiring and the cells shal...

Page 35: ...nment or death disease or injury to any person or damage to any property resulting directly or indirectly from the manufacture assembly purchase sales use operation transportation or disposal of the finished products except to the extent that the customer shall be exempted from such obligation if and so long as the cause of such damage is attributable directly and solely to VARTA Microbattery GmbH...

Page 36: ...edetermined breaking point Protection Circuit Module Design Electrolyte has corrosive characteristics Protection circuit module may not work correctly if exposed to electrolyte This should be considered in protection circuit module design Main wiring patterns shall be separated from each other as much as possible Conductive patterns and connection terminals which may be short circuited by electrol...

Page 37: ...and specified model name Use the word Warning and indicate the statement Risk of Fire Explosion and Burns Do Not Disassemble Crush Heat Above 100ºC 212ºF Short Circuit or Incinerate or equivalent Final product shall be marked with following statement or equivalent Replacement may only be made with cell specified by the final product manufacturer with correct Part Number Fire or burning may occur i...

Page 38: ...Besides the bare cells VARTA Microbattery provides customized solutions for all kinds of battery assembly in order to meet customers individual requirements VARTA can offer many different cell configurations together with the necessary connections such as wires and tags Multicell assembly is possible as well ...

Page 39: ...nPower battery may be soldered onto a PCB For this purpose every tag supplied by VARTA is tin plated in order to improve its solderability Please consider the following guidance on the solderability of the CoinPower cell Using a Soldering Iron Do not allow the soldering iron to make direct contact with the body of the cell Proceed with soldering quickly within 3 seconds while maintaining the iron ...

Page 40: ...COINPOWER 40 9 Application check list ...

Page 41: ...best possible energy solution for your application VARTA Microbattery needs certain information Please contact us on our website www varta microbattery com en contact form or get in direct contact with your Key Account Manager COINPOWER APPLICATION CHECK LIST ...

Page 42: ...COINPOWER 42 10 Glossary ...

Page 43: ...ery is a battery that is designed to be used once and discarded and not recharged with electricity and reused like a secondary cell Separator A microporous thin film inserted between cathode and anode to prevent short circuits and maintain spacing Polyethylene film polypropylene film or other film is used Cathode An electrode at higher potential than the anode passing electric current to the outsi...

Page 44: ...ecessary to hold the battery at this final voltage typically 4 2 V per cell Thus the charger must be capable of providing stable control loops for maintaining either current or voltage at a constant value depending on the state of the battery PCM Protection Circuit Module is a device to protect a battery against risk of abnormal events such as over discharge overcharge or short circuit PCB A print...

Page 45: ...tery Japan K K Kyobashi Y SUS Bldg 3F 1 6 12 Kyobashi Chuo Ku Tokyo 104 0031 Japan Tel 81 3 35 67 81 71 Fax 81 3 35 67 81 75 USA VARTA Microbattery Inc 555 Theodore Fremd Avenue Suite C 304 Rye NY 10580 USA Tel 1 914 592 25 00 Fax 1 914 345 04 88 Indonesia PT VARTA Microbattery Indonesia Jalan Gaharu Lot 23 Jalan Angsana Lot 307 310 Batamindo Industrial Park Mukakuning Batam KEPRI 29433 Indonesia ...

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