On April 21, 2026, CATL confirmed at the ‘Super Tech Day’ event that the mass production process for sodium-ion batteries is accelerating, simultaneously triggering concentrated procurement demand for high-precision, wide-temperature-range, electromagnetic-interference-resistant pressure and temperature sensing modules. This development is directly linked to the supporting upgrade of the Battery Management System（BMS）, and raises new requirements for sensor design, certification, and delivery capability. Sub-sectors worth attention include the automotive electronics supply chain, energy storage system integrators, industrial sensor manufacturing, and export compliance service enterprises.

Event Overview

On April 21, 2026, CATL publicly confirmed at ‘Super Tech Day’ that the construction of sodium-ion battery production lines and the pace of mass production are accelerating. Its supporting Battery Management System（BMS）has put forward clear technical requirements for pressure/temperature sensing modules: improved measurement accuracy, operating temperature range coverage of -40℃~125℃, and strong electromagnetic interference resistance. At present, urgent pilot production orders have been issued to multiple domestic sensor manufacturers, with related order volume increasing by 300% year-on-year.

Which Sub-sectors Will Be Affected

Sensor Manufacturing Enterprises（Processing and Manufacturing Enterprises）

As CATL has clearly required sensing modules to adapt to the highly dynamic operating conditions and wide-temperature-range environment of sodium battery BMS, the manufacturing side needs to respond quickly in adjusting material selection, packaging processes, and EMC structural design. The impact is mainly reflected in compressed product verification cycles, increased frequency of small-batch rapid-return pilot production, and greater reliance on international certifications such as UN38.3 and IEC 62619.

Energy Storage System Integrators（Direct Trade Enterprises）

The accelerated overseas expansion of sodium battery systems will drive demand for standardized replacement of sensing modules in complete-machine BMS solutions. The impact is reflected in: existing temperature/pressure acquisition links needing to be re-adapted to sodium battery characteristics; stricter upfront review of compliance documents for sensing modules（such as certification reports and test data packages）in overseas project tenders; and some projects may require domestic sensor manufacturers to directly participate in joint verification.

Certification and Testing Service Institutions（Supply Chain Service Enterprises）

UN38.3（transport safety）and IEC 62619（industrial lithium/sodium battery safety）certification have become key thresholds for the export of sensor modules supporting sodium batteries. The impact is mainly manifested as: phased growth in certification applications; increased consultation on newly added items such as wide-temperature-range cycling and salt spray + vibration combined testing; and some enterprises beginning to seek integrated “certification + rectification guidance” services.

What Should Relevant Enterprises or Practitioners Focus On, and How Should They Respond at Present

Pay close attention to CATL’s subsequent sodium battery BMS technical white papers or interface specifications

Current orders are based on pilot production stage requirements, and the technical agreements and communication protocols before formal mass production（such as CAN FD signal formats and sampling frequency definitions）have not yet been fully disclosed. It is recommended that sensor manufacturers continuously follow updates from CATL’s official technical channels to avoid inertia-driven development based on existing lithium battery BMS logic.

Prioritize sorting out the list of in-production models that have obtained UN38.3 and IEC 62619 certification

The information clearly points out that it “particularly benefits enterprises that have passed UN38.3 and IEC 62619 certification,” indicating that certification status has become a practical screening criterion for order allocation. Enterprises should immediately verify the certification coverage of existing products（including sub-items such as temperature grades and mechanical shock grades）, and initiate supplementary testing plans for models that do not cover key indicators such as -40℃ startup and 125℃ continuous operation.

Evaluate the responsiveness and flexibility of existing production lines for small-batch, multi-variety pilot production

Orders are marked as “urgent pilot production,” and the increase reaches 300%, reflecting that the current stage is a period of technical verification and production line integration. Enterprises need to review whether SMT mounting, calibration, EMC rectification, and other links support flexible delivery at the level of 50–200 units per batch, so as to avoid delayed delivery caused by rigid manufacturing processes and affecting subsequent nomination opportunities.

Establish an early-stage technical alignment mechanism with downstream sodium battery system providers

In addition to CATL, other sodium battery manufacturers are also following up on BMS development progress. It is recommended that sensor enterprises proactively initiate BMS sensing interface compatibility assessments with energy storage system providers that have publicly announced sodium battery deployment（such as Sungrow Power Supply, HiTHIUM, etc.）, identify common requirements in advance, and reduce the cost of repeated development at a later stage.

Editor’s Viewpoint / Industry Observation

From an industry perspective, this surge in orders is more appropriately understood as a phased signal from the supporting BMS segment in the industrialization process of sodium batteries, rather than the result of full-chain mature implementation. Analysis shows that the 300% order increase reflects leading battery manufacturers’ intention to conduct concentrated verification of the technical adaptability of sensing modules. Behind this are differentiated requirements imposed by sodium batteries on traditional sensing solutions in areas such as low-temperature performance and cost sensitivity. Observation suggests that this trend has not yet been transmitted to the stage of large-scale mass production delivery, but it has substantially raised the technical and compliance thresholds for entering the sodium battery BMS supply chain. What the industry needs to continue watching is whether similar orders will be released by second-tier battery manufacturers, as well as the progress of certification bodies in responding to specialized testing standards for sodium battery sensors.

Conclusion: The core industry significance of this information lies in the fact that it marks the industrialization of sodium-ion batteries extending from cell manufacturing to system-level supporting components, with sensing, as a key component of the BMS perception layer, being placed for the first time at the front end of scaled deployment. At present, it is more appropriate to understand this as a highly certain technical adaptation signal—it does not mean a full market outbreak, but it has clearly defined a business window for enterprises with certification foundations, temperature-range design capabilities, and rapid pilot production responsiveness to take the lead in entering the market.

Source note: public information from CATL’s ‘Super Tech Day’ on April 21, 2026; all event summary content comes from the information input provided. Items for continued observation: the release pace of BMS sensor supporting orders from other sodium battery manufacturers, and revision trends in specialized testing clauses for sodium battery sensors by international standards organizations such as IEC/UL.