発表内容の要点

国内での次世代HV電池生産 (2027年 – 2028年)国内のHV用電池生産ライン（60万台規模）を、より高性能で低コストな次世代電池へ切り替えます。これにより、車両1台あたり数万円規模のコスト削減効果が見込まれています。
トヨタバッテリーでの移行と増強 ( – 2030年)静岡県湖西市にある子会社「トヨタバッテリー」の生産ラインにて、従来のニッケル水素電池からリチウムイオン電池への順次切り替えを行い、あわせて生産能力も増強します。
海外（インドネシア）での供給網構築長期計画として、中国の車載電池大手であるCATLがインドネシアにて、トヨタ向けに20万台分のHV用電池を生産する方針です。
HV世界販売台数の見通しトヨタのHV世界販売台数は、2026年に初めて年間500万台を超える見通しです。

Toyota to Overhaul Domestic Production Lines for Next-Generation HEV Batteries: 600,000-Unit Scale to Be Introduced by 2028

Toyota Motor Corporation has decided on a domestic production policy for next-generation batteries to meet growing global demand for hybrid electric vehicles (HEVs), aiming to further reduce costs and boost profitability.

The key points of the announcement and relevant background information to deepen understanding are summarized below.

Key Announcement Points

Domestic Next-Generation HEV Battery Production (2027 – 2028)Toyota will transition its domestic HEV battery production lines (scale of 600,000 units) to higher-performance, lower-cost next-generation batteries. This is expected to yield cost reductions on the order of tens of thousands of yen per vehicle.
Transition and Expansion at Toyota Battery (- 2030)At the production lines of its subsidiary Toyota Battery in Kosai City, Shizuoka Prefecture, the company will sequentially transition from traditional nickel-metal hydride batteries to lithium-ion batteries while also expanding production capacity.
Building an Overseas Supply Chain (Indonesia)As part of a long-term plan, major Chinese automotive battery manufacturer CATL is set to produce HEV batteries for 200,000 vehicles for Toyota in Indonesia.
Global HEV Sales OutlookToyota’s global HEV sales are projected to exceed 5 million units annually for the first time in 2026.

Relevant Information & Background Context

1. Importance of HEVs in the Multi-Pathway Approach

Toyota advocates a “Multi-Pathway Approach” that provides diverse options beyond battery electric vehicles (BEVs), including HEVs, plug-in hybrid electric vehicles (PHEVs), and fuel cell vehicles (FCVs). As the rapid global surge in BEV demand stabilizes, HEVs are gaining global recognition as an immediate and practical means for carbon reduction, serving as a primary revenue generator for Toyota.

2. Strengthening Toyota Battery’s Structure

In 2024, Toyota made Primearth EV Energy—previously a joint venture with Panasonic Holdings—a wholly owned subsidiary and renamed it Toyota Battery. By managing supply systems for HEV, BEV, and PHEV batteries under a unified internal structure, the company is accelerating development and production while enhancing cost competitiveness.

3. Transition from Nickel-Metal Hydride to Lithium-Ion

While reliable and cost-effective nickel-metal hydride batteries were long used in traditional HEVs, technological advances have driven a transition toward higher-energy-density, lightweight lithium-ion batteries. Smaller and lighter batteries directly improve fuel efficiency and optimize interior cabin space.

4. Securing a Global Supply Chain via Partnership with CATL

By advancing its partnership with CATL (Contemporary Amperex Technology Co., Limited), the world’s largest battery manufacturer, Toyota aims to establish local procurement networks in growing markets like Indonesia to respond flexibly to rising global HEV demand.