TI E2E Community
Battery Management - Chargers Forum
I am using the BQ24171 EVM to charge and protect a single Li-ion cell. I have been able to discharge through the BMS, but It does not seem to be protecting the battery from over discharging. I have also been unable to recharge a battery, even one that is only discharged to 3.2V
The settings I am using are:
I have no temperature sensor attached to the external sensor. I am discharging through a 5Ohm power resistor and and have been providing external power at five volts (no power transfer) and at 10V (power transfer but no detectable charging.)
Any advice would be appreciated. Thank you.
If the temperature sensing is not needed, please disable it by putting a JP1 on “int”. Please follow the test procedure on the user’s guide for proper jumper set up.
I have performed the test, however it failed to meet specifications, right out of the box.
Note: In 2.5.2 the test is declaring Load#1 and Load#2, it has them interchanged. The device that can control its voltage and current requirements is simulating the battery, not the system load.
Note: In The test says "Connect 2-3 of JP1 (Internal TS);" but Internal and TS are pins 1-2
On to my test, when performing 2.7.1 It passed, but I note that for VBAT and REGN My voltage was almost zero, which is within the specs, but suspiciously so.
However the test failed in 2.7.2 VBAT and REGN were both .7V instead of the 6V and 4.2V expected (I am using the 001) so that step failed.
In 2.7.3 The addition of a constant voltage source to the system failed to produce any response in the system.
Please Advise. I bought another EVM to insure I had not merely broken the first one, but they both perform identically.
We are verifying these steps in the lab.
We verified the step in the lab, they worked as expect for us. Yes, there is a typo in the TS pin setup in the user’s guide, but that should not affect any thing regarding the functionality of the EVM. Also it is very well labeled in the EVM (Internal and External).
Make sure you are using power supply with enough current limits and an electronic load.
Table 5 provides the assembly number and the text of the EVM.
The bq24172/1EVM-706-15V is used for 3 cells.
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with respect to these materials. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.