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The Introduction of BMS Battery Management System

0 Published by admin Aug 06,2019

The Introduction of BMS ----Battery Management System

BMS (Battery Management System), as a key integral of battery electric vehicle and hybrid vehicle, is primarily composed of battery electronics (BE) and battery control unit (BCU), with the former responsible for collecting such data about battery as current, voltage and temperature and transmitting them to BCU, and the latter BCU accountable for information exchanges with other control units.

BMS has three core functions consisting of cell monitoring, SOC (State of Charge) estimation, and single battery equalization. BMS monitors the working temperature and quantity of electricity of a single lithium battery cell and automatically adopts measures to equalize the charging and discharging current and prevent the overheating temperature, enabling EV power battery to gain best performance and the longest life cycle under any circumstances, and being a kind of crucial technology to develop electric vehicle.

In 2016, a total of 748,000 electric passenger cars were sold worldwide, surging by 36.1% from a year earlier, with increments mainly from China and Europe. Foreign power battery BMS generally renders the active equalization technology and single car has higher costs. The global BMS market size reported USD4.17 billion in 2016, and is expected to reach USD11.17 billion in 2025, presenting a CAGR of 11.6% during 2017-2025.

The traditional auto parts vendors represented by Denso and Preh have seize the initiative by dint of their key roles in vehicle supply chain. Denso as the most important supplier of parts for Toyota has provided BMS modules to vehicle models like Prius and Camry Hybrid successively, while Preh not only supplies products to BMW I series BEVs but vigorously explore Chinese market by resorting to the resources of its parent company Joyson Electronics.

Cell vendors like LGC attempts to constricts the functional range of BMS and make it simple and universal, and to spin off software and data services as a separate supply to automakers. Among carmakers, Tesla BMS is mature and sophisticated and its next-generation technology will be applicable to bigger single cell.

In 2016, China produced 517,000 electric vehicles and sold 507,000 ones, a respective upsurge of 51.7% and 53% year on year, helping Chinese market size of power battery BMS grow explosively to about RMB5 billion in 2016 and as expected to RMB14 billion to RMB15 billion in 2020.

In the upcoming five years, Chinese power battery BMS market will show the trends as follows:

  • 1) As concerns policy, National Technical Committee of      Auto Standardization is drafting national BMS standards out of      consideration for requirements on NEV (New Energy Vehicle) safety. BMS      technical norms become ever stringent;

  • 2) As the penetration rate of ternary lithium battery      rises, higher requirements are posed on battery safety management;

  • 3) What matters most to BMS are active cell balancing      and design of SOC estimation algorithm. The ligh-asset hardware design      companies will enjoy higher profitability;

  • 4) Vehicle makers and battery cell vendors have their      plans to extend into BMS industry chain. Due to technical barriers and      constraint of R&D investments, it is hard for upstream and downstream      enterprises to carry extension ambition. So, it is a rational act to      outsource BMS solutions.

As far as competitive landscape is concerned, Chinese BMS market accommodates three kinds of enterprises:

  • 1) Third-party BMS vendors, like E-power Electronics,      Shenzhen Klclear Technology, SINOEV Technologies, Inc., Hunan Gold Cup New      Energy Development, etc., of which E-power electronics is an early entrant      whose BMS products are supplied to EV models of Changan Automobile,      Dongfeng Motor, BAIC Motor, FOTON, JAC, ZOTYE, etc. This kind of vendors      account for 42% of the overall market;

  • 2) Battery module and PACK packaging companies, like      Guoxuan Hi-Tech, CATL, OptimumNano, Sunwoda, etc. access into the market      through either independent R&D or cooperation. This kind of companies      makes up 37% of the overall market;

  • 3) Vehicle makers. BYD and BAIC BJEV have made perfect      deployments. BYD integrates battery, BMS and development of electric      vehicle and enjoys advantages in cost and efficiency; BAIC BJEV is capable      of developing BMS after acquisition of Atieva and need BMS suppliers no      more. This kind of vendors share 21% of the overall market.

The report covers the following:

  • EV market development in China and the world (profile,      market size, vehicle output, sales volume, etc.);

  • Development of global BMS industry (status quo,      forecast, market size, technology trends, etc.);

  • Development of BMS industry in China (status quo,      forecast, price & cost, market size, competitive pattern, supply      relation, technology trends, etc.);

  • World's major BMS companies (companies' and      subsidiaries' revenue, revenue structure, net income, R&D, products,      supply to vehicle makers, developments, business in China, etc.);

  • Leading BMS companies in China, involving independent      third-party, battery cell manufacturers, and automakers (OEM) (companies'      and subsidiaries' revenue, revenue structure, net income, R&D,      products, supply to vehicle makers, latest projects, etc.);

  • Key players in BMS chip industry (revenue, revenue      structure, net income, BMS chip solutions, etc.)