san francisco electric truck maker rivian automotive which currently sources batteries from south korean supplier samsung sdi plans to build battery cells inhouse its filing for a us initial public offering showed on fridaythe startup backed by amazoncom inc and ford motor co said in the filing that its own battery cells would complement thirdparty cell procurement which will provide supply continuity and support our anticipated growthrivian which disclosed losses of nearly 1 billion in the first half of the year said it sees capital expenditure of approximately 8 billion through the end of 2023 to invest in additional manufacturing capacity battery cell production charging networks and othersgiven the paramount importance and impact of the battery system on vehicle range performance and price we have built inhouse capabilities across the entire value chain rivian said adding that includes battery cell development battery manufacturing expertise and critical raw materials sourcingover time we intend to expand our capabilities related to proprietary cell development and inhouse cell manufacturing and expect that these functions will grow substantially in the coming years it saidrivian announced in april that it had selected samsung sdi as a battery supplier for its r1t pickup and r1s sport utility vehiclesamsung sdi is considering building a battery plant in central illinois where a rivian factory is located us senator dick durbin of illinois told reporters in augustreuters reported in july that rivian plans to build a second us assembly plant that will also include battery cell production citing people familiar with the matterrivian rival tesla inc last year announced a plan to build battery cells inhouse but tesla earlier this year canceled a plan to launch its longestrange model s plaid sedan with the new battery cells