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SEALED ENERGY SYSTEMS

®

 

19 

User Manual  

      

3.3.10. Pack Calibration cycle  

 

The  fuel-gauge  uses  the  Impedance  Track  Technology  to  measure 
and  calculate  the  available  charge  in  battery  cells.  The  achievable 
accuracy is better than 1% error over the lifetime of the battery. Max 
Error  increases  by  1%  in  20  cycles,  e.g.,  only  occasionally  is  a  full 
charge/discharge learning cycle required to maintain high accuracy. 
 
 

3.4. 

Protection Electronics    

 
 

3.4.1.  Overview of Operations 

 
Electronic circuitry is permanently connected within the battery pack 
to  prevent  damage  if  either  the  charger  or  host  device  fails  to 
function correctly. The circuitry also protects the battery if an illegal 
current  source  is  placed  across  the  battery  terminals,  or  an  illegal 
load  is  connected.  Redundant  levels  of  protection  have  been 
implemented (the primary protection levels are auto-resettable and 
the secondary are non-resettable). 
 
 
 

3.4.2.  Charge Protection  

 
Over-Voltage: 

 

The primary protection circuit will prevent the battery from 
charging if any cell voltage >= 4300mV. Then, once all cell 
voltages are <= 4150mV, it will allow charging again. 

 

The secondary protection circuit will prevent the battery from 
charging if any cell voltage >= 4.45V +/-0.05V by blowing a 
power path logic fuse. The fuse is non-re-settable rendering 
the battery pack non-functional. 

Over-temp: 

 

The  primary  protection  circuit  also  provides  over-
temperature  protection  and  will  prevent  the  battery  from 
charging  at  temperatures  =>54ºC  (see  paragraph  3.1.5  for 
Charge  Current()  request).  Then,  once  the  battery 
temperature  has  cooled  to  <=45ºC,  it  will  again  allow 
charging. 

Over-Current: 

 

The primary protection circuit also provides continuous over-
current protection and will prevent the battery from charging 
at Current() => 6.0A*. Then, once the Average Current() <= 
200mA for 70sec, the battery will re-test the over-current 
condition, and again allow charging. 
*Note: Current values vary time to time. Check SDS with SES® 

Summary of Contents for SE-2034

Page 1: ...ery Model SE 2034 SE20340NR29 10 8V 11 4AH 123 12Wh Statement of Confidentiality The information contained within this document is confidential and proprietary to Sealed Energy Systems This information should not in whole or in part be reproduced disclosed or used except as expressly and duly authorized by Sealed Energy Systems ...

Page 2: ...gic Levels 12 3 3 3 SMBus Data Protocols 12 3 3 4 SMBus Host to Battery Message Protocol 13 3 3 5 SMBus Battery to Charger Message Protocol 14 3 3 6 SMBus Battery Critical Message Protocol 15 3 3 7 Host to Battery Messages Slave Mode 15 3 3 8 Battery to Charger Messages Master Mode 17 3 3 9 Critical Messages Master Mode 17 3 3 10 Pack Calibration Cycle 19 3 4 PROTECTION ELECTRONICS 19 3 4 1 Overvi...

Page 3: ...3 6V and a typical capacity of 2 85Ah giving a battery pack of 10 8V and 11 4Ah typical The battery is capable of communicating with host or the charger through the System Management Bus SMBus The battery is fully SMBus and SBDS Revision 1 1compliant Protection is provided for over charge over discharge and short circuit For redundancy passive safety devices have been integrated into the pack to p...

Page 4: ...f contact has been made wash the affected area with copious amounts of water and seek medical advice Keep batteries clean and dry Secondary batteries need to be charged before use When possible remove the battery from the equipment when not in use Do not store batteries longer than 1 month in discharged state Do not storage batteries longer than 1 year without recharge 2 3 2 Charge Discharge Batte...

Page 5: ...e with local state and federal laws and regulations Consult universal hazardous waste regulations for further information regarding disposal of spent batteries If the internal cells are leaking broken open consult hazardous waste regulations under US Environmental Protection Agency s Resource Conservation and Recovery Act RCRA waste code D003 reactivity Also consult state and local regulations for...

Page 6: ... Transport Regulations Expended Lithium Ion Battery packs are not considered hazardous waste Lithium ion battery packs that have been involved in a fire maybe considered hazardous waste and should be marked and classified as such Classification of Waste Packaging Material Under normal use packaging is not consider hazardous and should be disposed of in accordance with local recycling regulations P...

Page 7: ...ow 80 RH The battery shall be capable of continuous discharge within the Operating Boundary as shown in the graph below Host devices should be designed for a controlled shutdown following battery notification of termination by the battery sending TERMINATE_DISCHARGE alarm prior to protection circuit cut off ...

Page 8: ...s shown in the graph below A dedicated level II or level III smart battery charger is required to charge the battery Using this type of charger the battery will request appropriate charging Voltage and Current from the smart battery charger The FULLY_CHARGED bit in the BatteryStatus will be set when the charging current tapers down under 200mA while charging at 12 6V ...

Page 9: ...ock and data lines require separate pull ups to system logic voltage NOT the battery voltage Typically a 15KΩ pull up resistor is used but please refer to the SMBus Specification for additional info 3 2 Fuel Gauge Electronics 3 2 1 Overview of Operation The battery is capable of communicating with host or the charger through the System Management Bus SMBus The battery is fully SMBus and SBDS Revis...

Page 10: ...e charging requests to an SMBus level II or level III charger The system has three modes of operation normal sleep and shutdown In normal mode measurements calculations protection decisions and data updates are made on 1 sec intervals Between these intervals the electronics enters a reduced power mode Sleep mode is entered when the system senses no host or charger present While in this mode batter...

Page 11: ...re not taken into consideration 3 2 3 2 Temperature The internal pack temperature is measured by an NTC thermistor attached to the cell stack Temperature readings have a resolution of 0 1 K The absolute accuracy is 3 K over an operating range of 20 C to 80 C 3 2 3 3 Current The current measurements have a resolution of 1mA The absolute accuracy of the reading is 0 7 or 3mA whichever is greater ove...

Page 12: ...tery Data Specification Rev1 1 Dec15 1998 Smart battery Charger Specification Rev1 0 June27 1996 3 3 2 SMBus Logic Levels SYMBOLS PARAMETERS LIMITS UNITS MIN MAX Vil Data Clock input low voltage 0 3 0 8 V Vib Data Clock input high voltage 2 1 5 5 V Vol Data Clock output low voltage 0 4 V 3 3 3 SMBus Data Protocols SMBus Interface complies with SBS Specification Version 1 1 The battery pack include...

Page 13: ...top condition Write Word Protocol Write Word Protocol w PEC SMBus Host Master Smart Battery Slave 3 3 4 2 Read Word Reading data is slightly more complex than writing data First the host must write a command to the slave device Then it must follow that command with a repeated start condition to denote a read from that device s address The slave then returns two bytes of data Note that there is not...

Page 14: ...e 3 3 5 SMBus battery to Charger Message Protocol The Smart Battery acting as an SMBus master will dynamically alter the charger characteristics of the Smart Charger behaving as an SMBus slave using the SMBus Write Word protocol Communication begins with the Smart Charge s address followed by a Command Code and a two bytes value The Smart Charger adjust its output to correspond with the request 1 ...

Page 15: ... of the message and that the following 16 bits are its status Battery Critical Message Battery Critical Message w PEC SMBus Host Master Smart Battery Slave 3 3 7 Host to battery Message Slave Mode The Host acting in the role of bus master uses the read word write word and read block protocols to communicate with the battery operating in slave mode 1 7 1 1 8 1 8 1 8 1 1 S Charger Address Wr A Comma...

Page 16: ...pack s internal temperature 0 1 oK r Function Command Code Description Unit Access Default POR Voltage 0x09 Returns the battery s voltage measured at the cell stack mV r Current 0x0a Returns the current being supplied or accepted through the battery s terminals mA r 0 Average Current 0x0b Returns a rolling average based upon the last 64 samples of current mA r 0 Max Error 0x0c Returns the expected...

Page 17: ...20 Returns a character array containing the manufacture s name string r SES Device Name 0x21 Returns a character array that contains the battery s name string r SE 2034 Device Chemistry 0x22 Returns a character array that contains the battery s chemistry string r LION Manufacturer Data 0x23 Returns data specific to the manufacture r 3 3 8 Battery to charger Messages Master Mode The battery acting ...

Page 18: ...threshold OTC recovery 56ºC OTD recovery 65OC Bit Battery Status Set When Action When Set Cleared When 11 TERMINATE_DI SCHARGE_ALA RM Relative State of Charge 0 Cell Under Voltage CUV Over Current Discharge OCD Over Temp Discharge OTD conditions CUV 2400mV OCD 6250mA OTD 750C Stop discharging Relative State Of Charge 1 CUV OCD or OTD recovery threshold CUV recovery 3000mV OCD recovery 200mA for 70...

Page 19: ...d the secondary are non resettable 3 4 2 Charge Protection Over Voltage The primary protection circuit will prevent the battery from charging if any cell voltage 4300mV Then once all cell voltages are 4150mV it will allow charging again The secondary protection circuit will prevent the battery from charging if any cell voltage 4 45V 0 05V by blowing a power path logic fuse The fuse is non re setta...

Page 20: ...e settable rendering the battery pack non functional Over Current The primary protection circuit also provides continuous over current protection and will prevent the battery from discharging at Current 6 0A Then Once the Average Current 200mA for 70sec the battery will re test the over current condition and again allow discharging 3 4 4 Short Circuit Protection The primary protection circuit will...

Page 21: ...nnector The recommended interconnection mating male connector is AMP TE part no 5787428 1 or 5787421 1 3 6 3 Packing The batteries are packaged in bulk per current regulations 3 7 Environmental Safety Specifications 3 7 1 EMC and Safety The battery complies with the following EMC Directive 2004 108 EC Low Voltage Directive 2006 95 EC Battery Recycling Directive 2006 66 EC as amended RoHS Directive...

Page 22: ...00 charge discharge cycles where the charge phase is CC CV C 3 12 6 0 05V and the discharge is C 3 down to 3 0V Cell at 25 C 3 8 2 Warranty Sealed Energy Systems maintains a high quality standard All products are warranted against defects in workmanship material and construction The warranty period is one 1 year from the date of shipment from Sealed Energy Systems ...

Page 23: ...order to prevent parasitic drain on the battery the electronics will go into a shutdown mode if any cell voltage 2300mV If this should happen the battery pack will require an initial low charge to activate the electronics prior to the implementation of the normal charge Any SMBus version 1 0 or higher compatible charger is capable of providing this initial pre charge Statement of Confidentiality T...

Page 24: ...SEALED ENERGY SYSTEMS 24 User Manual 4 0 Mechanical Drawing ...

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