Battery thermal management system

Lithium-ion cells are being widely used in smart devices due to their compact and lightweight nature, and also their up to the mark performance. Thanks to these batteries, for now, people can stay assured that their devices will serve them for one full day or even a couple, on a single charge. These batteries, however, also have a certain lifespan, which can drastically decrease if the battery is not used with care.

Over-charging a battery can lead to a shorter life span while the battery can get heated, catch fire, or even explode. Even over-discharging a battery has its own adverse effects on the health of the battery. The battery should be allowed to discharge only to a certain safe level, which is approximately 5% below its full capacity. Also, the temperature of the battery should never become too high or else it will lead to disturbing the normal functioning of the battery. With all these (actually a lot more) things to take care of, it becomes almost impossible for the users to monitor and manage these conditions manually. This is where the advanced battery thermal management systems come into play.

Battery management systems are intelligent circuits loaded with some MOSFETs, ICs, and sensors which are dedicated to monitor and manage the various aspects of a battery. They prevent the batteries from leaving the safe zone of function by preventing over-charging, over-discharging, overheating, and other such issues. They also record and output important information like the amount of battery power remaining, the expected battery life, battery performance, and so on, to the user.

A modern battery management system generally administers the following battery parameters:

1. Voltage- The battery management system incorporates two switching MOSFETs. One to prevent over-charging and another to prevent over-discharging. When the voltage of the cells reaches a certain threshold level, the charging MOSFET breaks the circuit, thereby stopping further charging. Similarly, when the voltage level drops below a certain minimum potential threshold, the discharging MOSFET breaks the discharging circuit, thus preventing further discharge.
2. Current- The charging and discharging currents are maintained within the safe limits, preventing damage.
3. Temperature- The thermal conditions of the battery are monitored by the thermal management system. The cooling systems are triggered accordingly, keeping the temperature from rising above the safe temperature limits.
4. State of power- State of power is the measure of power that is left and the time period which it will last for as per the instantaneous voltage, current, and thermal conditions.
5. State of charge- The state of charge of individual cells is the amount of charge stored in them. The battery management system ensures that a balance maintained between the charge of individual cells or else the individual cells may undergo stress.

MAX1782ETM+C8F
Maxim Integrated

IC BATT MGMT CTRLR 48TQFN

Package: 48-WFQFN Exposed Pad

Stock5,232
MAX6428MRUR+T
Maxim Integrated

IC MONITOR BAT LP SOT23-3

Package: TO-236-3, SC-59, SOT-23-3

Stock30,000
BQ2014HSNG4
Texas Instruments

IC BATTERY GAS GAUGE 16-SOIC

Package: 16-SOIC (0.154", 3.90mm Width)

Stock7,424
S-8205AAB-TCT1U
SII Semiconductor Corporation

IC BATT PROTECTION

Package: 16-TSSOP (0.173", 4.40mm Width)

Stock300,840
S-8244AAUFN-CEUT2G
SII Semiconductor Corporation

IC BATT PROTECTION

Package: 8-LSSOP, 8-MSOP (0.110", 2.80mm Width)

Stock5,280
S-8209ABK-T8T1U
SII Semiconductor Corporation

IC BATT MFUNC LI-ION 8TSSOP

Package: 8-TSSOP (0.173", 4.40mm Width)

Stock4,624
S-8252ABQ-M6T1U
SII Semiconductor Corporation

IC BATT PROTECTION

Package: SOT-23-6

Stock4,688
S-8200ADC-I6T1U
SII Semiconductor Corporation

IC BATT PROTECTION

Package: 6-SMD, Flat Leads

Stock5,760
S-8200ABI-I6T1U
SII Semiconductor Corporation

IC BATT PROTECTION

Package: 6-SMD, Flat Leads

Stock6,160
PI5USB1458AZAEX
Diodes Incorporated

USB SLEEP CHARGE W-DFN2020-8

Package: -

Stock45,972
S-8211CAN-M5T1G
SII Semiconductor Corporation

IC BATT PROTECT LI-ION SOT23-5

Package: SC-74A, SOT-753

Stock18,336
S-8241ACLMC-GCLT2G
SII Semiconductor Corporation

IC LI-ION BATT PROTECT SOT23-5

Package: SC-74A, SOT-753

Stock42,624
S-8211CCW-M5T1U
SII Semiconductor Corporation

IC BATT PROTECT LI-ION SOT23-5

Package: SC-74A, SOT-753

Stock3,728
LTC3300IUK-2#PBF
Linear Technology

IC BATTERY BALANCER 48QFN

Package: 48-WFQFN Exposed Pad

Stock6,160
UCC3958PWP-2
Texas Instruments

IC L-I PROTECTOR CIRCUIT 24TSSOP

Package: 24-TSSOP (0.173", 4.40mm Width) Exposed Pad

Stock7,776
BQ29415DCTR
Texas Instruments

IC BATT PROT 2-4CELL LI-ION SM8

Package: 8-LSSOP, 8-MSOP (0.110", 2.80mm Width)

Stock4,288
LTC2943IDD#PBF
Linear Technology

IC GAS GAUGE MULTICELL 8DFN

Package: 8-WFDFN Exposed Pad

Stock14,136
BQ29701DSET
Texas Instruments

BQ29701DSET

Package: 6-WFDFN

Stock5,648
MAX6775XKB+T
Maxim Integrated

IC MONITOR BATT LP SC70-5

Package: 5-TSSOP, SC-70-5, SOT-353

Stock4,848
MAX17048X001+T10
Maxim Integrated

IC INTEGRATED CIRCUIT

Package: -

Stock2,000

Part Number	Manufacturer	Description	Package	Stock	Battery Chemistry	Number of Cells	Fault Protection	Interface	Operating Temperature	Package / Case	Supplier Device Package
MAX1782ETM+C8F	Maxim Integrated	IC BATT MGMT CTRLR 48TQFN Function: Battery Monitor Battery Chemistry: - Number of Cells: - Fault Protection: - Interface: - Operating Temperature: -40°C ~ 85°C (TA) Package / Case: 48-WFQFN Exposed Pad Supplier Device Package: 48-TQFN (7x7)	Package: 48-WFQFN Exposed Pad	Stock5,232	-	-	-	-	-40°C ~ 85°C (TA)	48-WFQFN Exposed Pad	48-TQFN (7x7)
MAX6428MRUR+T	Maxim Integrated	IC MONITOR BAT LP SOT23-3 Function: Battery Monitor Battery Chemistry: Multi-Chemistry Number of Cells: 1 Fault Protection: - Interface: - Operating Temperature: -40°C ~ 85°C (TA) Package / Case: TO-236-3, SC-59, SOT-23-3 Supplier Device Package: SOT-23-3	Package: TO-236-3, SC-59, SOT-23-3	Stock30,000	Multi-Chemistry	1	-	-	-40°C ~ 85°C (TA)	TO-236-3, SC-59, SOT-23-3	SOT-23-3
BQ2014HSNG4	Texas Instruments	IC BATTERY GAS GAUGE 16-SOIC Function: Battery Monitor Battery Chemistry: Multi-Chemistry Number of Cells: - Fault Protection: - Interface: - Operating Temperature: 0°C ~ 70°C (TA) Package / Case: 16-SOIC (0.154", 3.90mm Width) Supplier Device Package: 16-SOIC	Package: 16-SOIC (0.154", 3.90mm Width)	Stock7,424	Multi-Chemistry	-	-	-	0°C ~ 70°C (TA)	16-SOIC (0.154", 3.90mm Width)	16-SOIC
S-8205AAB-TCT1U	SII Semiconductor Corporation	IC BATT PROTECTION Function: Battery Protection Battery Chemistry: Lithium-Ion Number of Cells: 4 Fault Protection: Over Current, Short Circuit Interface: - Operating Temperature: -40°C ~ 85°C (TA) Package / Case: 16-TSSOP (0.173", 4.40mm Width) Supplier Device Package: 16-TSSOP	Package: 16-TSSOP (0.173", 4.40mm Width)	Stock300,840	Lithium-Ion	4	Over Current, Short Circuit	-	-40°C ~ 85°C (TA)	16-TSSOP (0.173", 4.40mm Width)	16-TSSOP
S-8244AAUFN-CEUT2G	SII Semiconductor Corporation	IC BATT PROTECTION Function: Battery Protection Battery Chemistry: Lithium-Ion Number of Cells: 1 ~ 4 Fault Protection: Over Voltage Interface: - Operating Temperature: -40°C ~ 85°C (TA) Package / Case: 8-LSSOP, 8-MSOP (0.110", 2.80mm Width) Supplier Device Package: 8-MSOP	Package: 8-LSSOP, 8-MSOP (0.110", 2.80mm Width)	Stock5,280	Lithium-Ion	1 ~ 4	Over Voltage	-	-40°C ~ 85°C (TA)	8-LSSOP, 8-MSOP (0.110", 2.80mm Width)	8-MSOP
S-8209ABK-T8T1U	SII Semiconductor Corporation	IC BATT MFUNC LI-ION 8TSSOP Function: Multi-Function Controller Battery Chemistry: Lithium-Ion/Polymer Number of Cells: - Fault Protection: - Interface: - Operating Temperature: -40°C ~ 85°C (TA) Package / Case: 8-TSSOP (0.173", 4.40mm Width) Supplier Device Package: 8-TSSOP	Package: 8-TSSOP (0.173", 4.40mm Width)	Stock4,624	Lithium-Ion/Polymer	-	-	-	-40°C ~ 85°C (TA)	8-TSSOP (0.173", 4.40mm Width)	8-TSSOP
S-8252ABQ-M6T1U	SII Semiconductor Corporation	IC BATT PROTECTION Function: Battery Protection Battery Chemistry: Lithium-Ion/Polymer Number of Cells: 2 Fault Protection: Over Current Interface: - Operating Temperature: -40°C ~ 85°C (TA) Package / Case: SOT-23-6 Supplier Device Package: SOT-23-6	Package: SOT-23-6	Stock4,688	Lithium-Ion/Polymer	2	Over Current	-	-40°C ~ 85°C (TA)	SOT-23-6	SOT-23-6
S-8200ADC-I6T1U	SII Semiconductor Corporation	IC BATT PROTECTION Function: Battery Protection Battery Chemistry: Lithium-Ion/Polymer Number of Cells: 1 Fault Protection: Over Current, Short Circuit Interface: - Operating Temperature: -40°C ~ 85°C (TA) Package / Case: 6-SMD, Flat Leads Supplier Device Package: SNT-6A	Package: 6-SMD, Flat Leads	Stock5,760	Lithium-Ion/Polymer	1	Over Current, Short Circuit	-	-40°C ~ 85°C (TA)	6-SMD, Flat Leads	SNT-6A
S-8200ABI-I6T1U	SII Semiconductor Corporation	IC BATT PROTECTION Function: Battery Protection Battery Chemistry: Lithium-Ion/Polymer Number of Cells: 1 Fault Protection: Over Current, Short Circuit Interface: - Operating Temperature: -40°C ~ 85°C (TA) Package / Case: 6-SMD, Flat Leads Supplier Device Package: SNT-6A	Package: 6-SMD, Flat Leads	Stock6,160	Lithium-Ion/Polymer	1	Over Current, Short Circuit	-	-40°C ~ 85°C (TA)	6-SMD, Flat Leads	SNT-6A
PI5USB1458AZAEX	Diodes Incorporated	USB SLEEP CHARGE W-DFN2020-8 Function: - Battery Chemistry: - Number of Cells: - Fault Protection: - Interface: - Operating Temperature: - Package / Case: - Supplier Device Package: -	Package: -	Stock45,972	-	-	-	-	-	-	-
S-8211CAN-M5T1G	SII Semiconductor Corporation	IC BATT PROTECT LI-ION SOT23-5 Function: Battery Protection Battery Chemistry: Lithium-Ion/Polymer Number of Cells: 1 Fault Protection: Over Current, Short Circuit Interface: - Operating Temperature: -40°C ~ 85°C (TA) Package / Case: SC-74A, SOT-753 Supplier Device Package: SOT-23-5	Package: SC-74A, SOT-753	Stock18,336	Lithium-Ion/Polymer	1	Over Current, Short Circuit	-	-40°C ~ 85°C (TA)	SC-74A, SOT-753	SOT-23-5
S-8241ACLMC-GCLT2G	SII Semiconductor Corporation	IC LI-ION BATT PROTECT SOT23-5 Function: Battery Protection Battery Chemistry: Lithium-Ion/Polymer Number of Cells: 1 Fault Protection: Over Current, Over Voltage Interface: - Operating Temperature: -40°C ~ 85°C (TA) Package / Case: SC-74A, SOT-753 Supplier Device Package: SOT-23-5	Package: SC-74A, SOT-753	Stock42,624	Lithium-Ion/Polymer	1	Over Current, Over Voltage	-	-40°C ~ 85°C (TA)	SC-74A, SOT-753	SOT-23-5
S-8211CCW-M5T1U	SII Semiconductor Corporation	IC BATT PROTECT LI-ION SOT23-5 Function: Battery Protection Battery Chemistry: Lithium-Ion/Polymer Number of Cells: 1 Fault Protection: Over Current, Short Circuit Interface: - Operating Temperature: -40°C ~ 85°C (TA) Package / Case: SC-74A, SOT-753 Supplier Device Package: SOT-23-5	Package: SC-74A, SOT-753	Stock3,728	Lithium-Ion/Polymer	1	Over Current, Short Circuit	-	-40°C ~ 85°C (TA)	SC-74A, SOT-753	SOT-23-5
LTC3300IUK-2#PBF	Linear Technology	IC BATTERY BALANCER 48QFN Function: Battery Balancer Battery Chemistry: Multi-Chemistry Number of Cells: 1 ~ 12 Fault Protection: - Interface: Serial Operating Temperature: -40°C ~ 125°C (TJ) Package / Case: 48-WFQFN Exposed Pad Supplier Device Package: 48-QFN (7x7)	Package: 48-WFQFN Exposed Pad	Stock6,160	Multi-Chemistry	1 ~ 12	-	Serial	-40°C ~ 125°C (TJ)	48-WFQFN Exposed Pad	48-QFN (7x7)
UCC3958PWP-2	Texas Instruments	IC L-I PROTECTOR CIRCUIT 24TSSOP Function: Battery Protection Battery Chemistry: Lithium-Ion Number of Cells: 1 Fault Protection: Over Current, Over Temperature, Over/Under Voltage, Short Circuit Interface: - Operating Temperature: -20°C ~ 70°C (TA) Package / Case: 24-TSSOP (0.173", 4.40mm Width) Exposed Pad Supplier Device Package: 24-HTSSOP	Package: 24-TSSOP (0.173", 4.40mm Width) Exposed Pad	Stock7,776	Lithium-Ion	1	Over Current, Over Temperature, Over/Under Voltage, Short Circuit	-	-20°C ~ 70°C (TA)	24-TSSOP (0.173", 4.40mm Width) Exposed Pad	24-HTSSOP
BQ29415DCTR	Texas Instruments	IC BATT PROT 2-4CELL LI-ION SM8 Function: Battery Protection Battery Chemistry: Lithium-Ion Number of Cells: 2 ~ 4 Fault Protection: Over Voltage Interface: - Operating Temperature: -40°C ~ 110°C (TA) Package / Case: 8-LSSOP, 8-MSOP (0.110", 2.80mm Width) Supplier Device Package: SM8	Package: 8-LSSOP, 8-MSOP (0.110", 2.80mm Width)	Stock4,288	Lithium-Ion	2 ~ 4	Over Voltage	-	-40°C ~ 110°C (TA)	8-LSSOP, 8-MSOP (0.110", 2.80mm Width)	SM8
LTC2943IDD#PBF	Linear Technology	IC GAS GAUGE MULTICELL 8DFN Function: Battery Monitor Battery Chemistry: Multi-Chemistry Number of Cells: - Fault Protection: - Interface: I2C Operating Temperature: -40°C ~ 85°C (TA) Package / Case: 8-WFDFN Exposed Pad Supplier Device Package: 8-DFN (3x3)	Package: 8-WFDFN Exposed Pad	Stock14,136	Multi-Chemistry	-	-	I2C	-40°C ~ 85°C (TA)	8-WFDFN Exposed Pad	8-DFN (3x3)
BQ29701DSET	Texas Instruments	BQ29701DSET Function: Battery Protection Battery Chemistry: Lithium-Ion/Polymer Number of Cells: 1 Fault Protection: Over Current, Over/Under Voltage, Short Circuit Interface: - Operating Temperature: -40°C ~ 85°C (TA) Package / Case: 6-WFDFN Supplier Device Package: 6-WSON (1.5x1.5)	Package: 6-WFDFN	Stock5,648	Lithium-Ion/Polymer	1	Over Current, Over/Under Voltage, Short Circuit	-	-40°C ~ 85°C (TA)	6-WFDFN	6-WSON (1.5x1.5)
MAX6775XKB+T	Maxim Integrated	IC MONITOR BATT LP SC70-5 Function: Battery Monitor Battery Chemistry: Multi-Chemistry Number of Cells: 1 Fault Protection: - Interface: - Operating Temperature: -40°C ~ 85°C (TA) Package / Case: 5-TSSOP, SC-70-5, SOT-353 Supplier Device Package: SC-70-5	Package: 5-TSSOP, SC-70-5, SOT-353	Stock4,848	Multi-Chemistry	1	-	-	-40°C ~ 85°C (TA)	5-TSSOP, SC-70-5, SOT-353	SC-70-5
MAX17048X001+T10	Maxim Integrated	IC INTEGRATED CIRCUIT Function: - Battery Chemistry: - Number of Cells: - Fault Protection: - Interface: - Operating Temperature: - Package / Case: - Supplier Device Package: -	Package: -	Stock2,000	-	-	-	-	-	-	-
S-19190BDH-M6T1U	ABLIC Inc.	LINEAR IC Function: Multi-Function Controller Battery Chemistry: - Number of Cells: 1 Fault Protection: - Interface: - Operating Temperature: -40°C ~ 105°C (TA) Package / Case: SOT-23-6 Supplier Device Package: SOT-23-6	Package: -	Request a Quote	-	1	-	-	-40°C ~ 105°C (TA)	SOT-23-6	SOT-23-6
S-8253DAP-T8T1U	ABLIC Inc.	LINEAR IC Function: Battery Protection Battery Chemistry: Lithium Ion/Polymer Number of Cells: 2 ~ 3 Fault Protection: Over Current, Short Circuit Interface: - Operating Temperature: -40°C ~ 85°C (TA) Package / Case: 8-TSSOP (0.173", 4.40mm Width) Supplier Device Package: 8-TSSOP	Package: -	Request a Quote	Lithium Ion/Polymer	2 ~ 3	Over Current, Short Circuit	-	-40°C ~ 85°C (TA)	8-TSSOP (0.173", 4.40mm Width)	8-TSSOP
S-8240ABO-A6T2U	ABLIC Inc.	LINEAR IC Function: Battery Protection Battery Chemistry: Lithium Ion/Polymer Number of Cells: 1 Fault Protection: Over Current, Short Circuit Interface: - Operating Temperature: -40°C ~ 85°C (TA) Package / Case: 6-SMD, Flat Lead Exposed Pad Supplier Device Package: HSNT-6-B	Package: -	Request a Quote	Lithium Ion/Polymer	1	Over Current, Short Circuit	-	-40°C ~ 85°C (TA)	6-SMD, Flat Lead Exposed Pad	HSNT-6-B
S-82S1AAA-A8T2U	ABLIC Inc.	BATTERY PROTECTION IC FOR 1 CELL Function: Battery Protection Battery Chemistry: Lithium Ion/Polymer Number of Cells: 1 Fault Protection: Over Current, Short Circuit Interface: - Operating Temperature: -40°C ~ 85°C (TA) Package / Case: 8-SMD, Flat Lead Exposed Pad Supplier Device Package: HSNT-8-B	Package: -	Stock15,000	Lithium Ion/Polymer	1	Over Current, Short Circuit	-	-40°C ~ 85°C (TA)	8-SMD, Flat Lead Exposed Pad	HSNT-8-B
MAX6429BGUR-T	Analog Devices Inc./Maxim Integrated	IC BATT MON MULT-CHEM 1C SOT23-3 Function: Battery Monitor Battery Chemistry: Multi-Chemistry Number of Cells: 1 Fault Protection: - Interface: - Operating Temperature: -40°C ~ 85°C (TA) Package / Case: TO-236-3, SC-59, SOT-23-3 Supplier Device Package: SOT-23-3	Package: -	Request a Quote	Multi-Chemistry	1	-	-	-40°C ~ 85°C (TA)	TO-236-3, SC-59, SOT-23-3	SOT-23-3
S-8223CAE-I6T1U	ABLIC Inc.	IC BATT PROT LI-ION 2-3CL SNT-6A Function: Battery Protection Battery Chemistry: Lithium Ion Number of Cells: 2 ~ 3 Fault Protection: - Interface: - Operating Temperature: -40°C ~ 85°C (TA) Package / Case: 6-SMD, Flat Leads Supplier Device Package: SNT-6A	Package: -	Stock14,775	Lithium Ion	2 ~ 3	-	-	-40°C ~ 85°C (TA)	6-SMD, Flat Leads	SNT-6A
MC33771CTP1AE	NXP	BATTERY CELL CONTROLLER, PREMIUM Function: Battery Cell Controller Battery Chemistry: Lithium Ion Number of Cells: 7 ~ 14 Fault Protection: Over/Under Voltage Interface: SPI Operating Temperature: -40°C ~ 105°C (TA) Package / Case: 64-LQFP Exposed Pad Supplier Device Package: 64-LQFP (10x10)	Package: -	Request a Quote	Lithium Ion	7 ~ 14	Over/Under Voltage	SPI	-40°C ~ 105°C (TA)	64-LQFP Exposed Pad	64-LQFP (10x10)
BQ294713DSGR	Texas Instruments	IC BATTERY MANAGEMENT Function: Battery Protection Battery Chemistry: Lithium Ion Number of Cells: 2 ~ 4 Fault Protection: Over Voltage Interface: - Operating Temperature: -40°C ~ 85°C (TA) Package / Case: 8-WFDFN Exposed Pad Supplier Device Package: 8-WSON (2x2)	Package: -	Request a Quote	Lithium Ion	2 ~ 4	Over Voltage	-	-40°C ~ 85°C (TA)	8-WFDFN Exposed Pad	8-WSON (2x2)