上海钢联数据：今日电池级碳酸锂均价报71500元/吨

Group 1 - The core point of the article is that the price of battery-grade lithium carbonate remains stable, with an average price reported at 71,500 yuan per ton as of September 12 [1] Group 2 - The data was released by Shanghai Steel Union, indicating no change in price compared to the previous day [1] - The stability in lithium carbonate prices may reflect current market conditions and demand dynamics in the battery materials sector [1]