Table of Contents
1. ABLIC's Battery Protection ICs
Battery protection ICs protect batteries from hazards such as overcharging, overdischarging and overcurrent.
ABLIC has been developing and producing battery protection ICs since 1993, and has a track record of approximately 30 years in the industry.
Lineup Diversity Facilitating “Appropriate Circuit Configuration”
If we include products that can be used with 1-cell batteries and automotive applications, our lineup offers about 2,100 products. Our vast product lineup provides strong support for developing safety-critical battery packs with secondary protection and other features to suit customer needs such as smaller, lighter, and thinner applications and the cascade connection of a large number of battery cells in series.
A 30-year Track Record Contributing to Safety and Security
In development and commercialization of products over a 30-year period since 1993, we have built and used the following knowhow,
- Safety-critical product design
- Advanced manufacturing technology
- Reliable quality control
to provide our customers with safe and secure products.
Improving “Battery Pack Performance”
The high-withstand voltage CMOS process used in ABLIC's multi-cell battery protection ICs endows them with high accuracy and low power consumption. These ICs are also provided with the latest distinctive state-of-the-art functions optimized for a variety of applications enabling our customers to create battery packs with the performance they require.
Lineup of “Automotive Grade” High-quality Protection ICs
ABLIC offers a host of products for use in automotive applications.
The development of electric vehicles (EV) and autonomous driving is increasing the demand for batteries as the power source of an automotive system. ABLIC provides a lineup of automotive protection ICs for use in battery management systems (BMS) that manage automotive batteries.
Since automotive protection ICs must satisfy the high quality and high reliability required of automotive applications, we adopt the AEC-Q100 tests of the Automotive Electronics Council (AEC) to assess the reliability and quality of our products. They are also PPAP (Production Part Approval Process) capable.
In addition, we can provide protection ICs developed for automotive BMS in accordance with ISO26262 Functional Safety Standard, and a Safety Manual.
ABLIC's automotive protection ICs can be used for automotive applications that require higher safety.
2. Advantage of ABLIC's Battery Protection ICs for Multi-cell Pack
Able to function independent of microcontroller
- ・No need to develop complex control software.
- ・Continuously monitors battery status through stand-alone operation.
- ・Solid hardware protection improves the safety of battery packs.
The addition of protection ICs helps to improve safety
- ・In accordance with UL, IEC and other standards, it may be necessary to implement measures for single faults. Integrating protection IC into the system helps you comply with standards.
Technical capabilities to support the realization of optimal protection circuits
- ・We provide technical support from selecting and combining optimal products to designing customized protection circuits. For details, please contact our sales representatives.
3. Applications
4. Function Description
Cascade Function
This function allows connection of multiple ICs to protect more than the maximum number of batteries possible for a single IC.
With the cascade function you can configure protection circuits for various numbers of batteries using the same series of ICs.
Related Information
- S-8245A/C Series application note
- S-8255A Series application note
- S-8245A/C Series reference design:
Integrated charge and discharge path circuits (S-8245A):
6 cells | 7 cells | 8 cells | 9 cells | 10 cells
Separate charge and discharge paths circuits (S-8245C):
6 cells | 7 cells | 8 cells | 9 cells | 10 cells
Cell Balancing Function
Repeated charging and discharging may cause a difference (imbalance) in battery voltage due to slight variations in characteristics between lithium-ion batteries, resulting in shorter battery run time.
The cell balancing function uses a bypass route to discharge the battery that first reaches the cell-balance detection voltage in the charging cycle to compensate for any imbalance that may occur.
Related Information
Wake-up Function
The protection circuit board pins must be connected to the battery in the determined order when they are first connected as the secondary protection IC may otherwise output a signal that would blow the protection fuse.
The wake-up function prevents the output of a blown fuse signal until all batteries have been connected regardless of which order the battery and the protection circuit board has been connected in.
Temperature Protection Function
An external NTC thermistor can be used to monitor the temperature and control charging and discharging.
Power-saving Function
This function sets the discharge current of the battery pack and the current consumption of the protection circuit to about zero.
This makes it possible to store and ship batteries at about zero current level.
Output Voltage Limit Function
This function limits the maximum output voltage of the external FET control pin below a certain voltage.
Thus, FETs with a low gate withstand voltage can be used without additional components.
5. Product Lineup of Battery Protection ICs for Multi-cell Pack
Battery Protection
| Application example | Product name | Number of cells | Data- sheet | Buy online | Remarks | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 or more | |||||||||
| Power Tools Laptops | ||||||||||||||
| S-82A2A/B/C | – | ✓ | – | – | – | – | – | – | ✓ | – |     | |||
| S-82B2A/B | – | ✓ | – | – | – | – | – | – | ✓ | – | | |||
| S-82C2A | – | ✓ | – | – | – | – | – | – | – | – | | |||
| S-82C2B/C | – | ✓ | – | – | – | – | – | – | ✓ | – | | |||
| S-82B4A | – | – | – | ✓ | – | – | – | – | ✓ | – | | 4 cells | ||
| S-82B5A | – | – | – | – | ✓ | – | – | – | ✓ | ✓ | | 5 cells | ||
| S-82C4A | – | – | – | ✓ | – | – | ✓ | – | ✓ | – | | 4 cells | ||
| S-82C5A | – | – | – | – | ✓ | – | ✓ | – | ✓ | ✓ | | 5 cells | ||
| S-8245A | – | – | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | Integrated charge and discharge path | S-8245C | – | – | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | Separate charge and discharge paths |
| S-8245B | – | – | ✓ | ✓ | ✓ | – | ✓ | – | ✓ | ✓ | | Integrated charge and discharge path | ||
| S-8245D | – | – | ✓ | ✓ | ✓ | – | ✓ | – | ✓ | ✓ | | Separate charge and discharge paths | ||
Secondary Protection
| Application example | Product name | Number of cells | Constant voltage output | Data- sheet | Buy online | Remarks | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 or more | ||||||||||
| Power Tools Laptops UPS | |||||||||||||||
| S-82K5B | – | – | ✓ | ✓ | ✓ | ✓ | ✓ | – | – | – | – | | |||
| S-82M5B | – | – | ✓ | ✓ | ✓ | ✓ | ✓ | – | – | – | – | | |||
| S-8223A/B/C/D | – | ✓ | ✓ | – | – | – | – | ✓ | – | – | – | | |||
| S-8224A/B | – | ✓ | ✓ | ✓ | – | – | – | ✓ | – | – | – | | |||
| S-82H4 | – | – | ✓ | ✓ | – | – | – | ✓ | ✓ | – | – | | |||
| S-82K3/K4 | – | – | ✓ | ✓ | – | – | – | ✓ | ✓ | ✓ | – | | |||
| S-82P5B | – | – | ✓ | ✓ | ✓ | – | – | – | – | – | – | | |||
| S-8215C | – | – | ✓ | ✓ | ✓ | – | – | – | – | – | – | | |||
| S-8265C | – | – | ✓ | ✓ | ✓ | – | – | – | – | – | ✓ | | |||
Overcurrent Monitoring
| Application example | Product name | Number of cells | Discharge overcurrent detection | Load short-curcuiting detection | Charge overcurrent detection | No External capacitor needed | Data- sheet | Buy online | Remarks | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 or more | |||||||||
| – | ||||||||||||||
| S-8269B | – | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | |||
Simple Battery Level Indicator
| Application example | Product name | Number of cells | LED Drive | Enable / Disable control | Data- sheet | Buy online | Remarks | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 or more | |||||||||
| Power Tools | ||||||||||||||
| S-8229A | – | – | VDET: 10.5V | – | ✓ | ✓ | | |||||||
6. Packages
7. Try ABLIC's Battery Protection ICs for Multi-cell Pack
ABLIC's battery protection ICs for multi-cell pack can be purchased online. They are highly recommended.