1. Participate in product roadmap planning and project definition for energy storage systems. Analyze system requirements, assess technical risks, develop product specifications and system solutions, define key performance indicators such as system efficiency, usable capacity, losses, and battery degradation, and allocate system requirements across Cell, EMS, PCS, and BMS teams.
2. Coordinate cross-functional development across EMS, PCS, BMS, fire protection, thermal, electrical, and other engineering teams to ensure product functionality and key performance targets align with the common system platform.
3. Lead system solution development and system architecture design, and review control, communication, electrical, and fire protection designs.
4. Participate in technical definition and acceptance reviews for in-house Cell, EMS, PCS, and BMS products, and evaluate third-party products for system integration.
5. Participate in system-level functional and performance validation.
6. Establish and continuously improve the IPD process for energy storage system development, defining review criteria across requirements analysis, product definition, solution design, engineering development, product validation, and production release.
7. Break down system technical requirements, identify development risks, and lead the resolution of critical technical challenges.
8. Provide technical solutions to customer-facing teams and support technical discussions and tender responses for major energy storage projects.
1. Master’s degree or above in Electrical Engineering, Automation, Mechanical Engineering, Thermal Engineering, Electrochemistry, Mechatronics, or a related field. At least 5 years of experience in energy storage system development with a master’s degree, or 2 years with a PhD.
2. Solid understanding of energy storage systems and key components, including PCS, BMS, EMS, communication systems, and lithium-ion batteries.
3. In-depth knowledge of C&I and utility-scale energy storage applications. Familiarity with system architecture, battery characteristics, and the selection and design of battery clusters, PCS, and transformers. At least 2 years of experience in energy storage system design.
4. Familiarity with applicable design standards and regulations, including IEC, UL, and relevant national standards.
5. Strong organizational, cross-functional collaboration, and communication skills.
6. Strong analytical and problem-solving skills with experience in root cause analysis and issue resolution.
7. Experience providing technical support for pre-sales activities.
ESSRecruitment@jinkoess.com
1. Design thermal management solutions for utility-scale energy storage containers, C&I energy storage cabinets, and other energy storage products. Perform system-level thermal simulation, testing, and simulation data analysis.
2. Perform battery pack- and system-level thermal simulations, including cooling unit selection, piping layout, pressure drop analysis, thermal propagation and thermal runaway design, and integration with the SCU.
3. Collaborate with structural, electrical, and other engineering teams to deliver integrated product designs.
4. Drive continuous product optimization and cost reduction initiatives, with responsibility for thermal performance and reliability.
5. Research and apply new thermal materials and advanced thermal management technologies.
6. Develop and continuously improve thermal design standards and engineering processes.
7. Prepare patent applications and technical disclosures on a regular basis.
1. Bachelor’s degree or above in Refrigeration Engineering, Thermal Engineering, Engineering Thermophysics, Power Engineering, Mechanical Engineering, or a related field, with at least 5 years of experience in energy storage, new energy vehicles, or related industries.
2. Experience designing and simulating thermal management systems for utility-scale energy storage containers, C&I energy storage cabinets, or battery packs. Strong knowledge of liquid cooling and air cooling systems, with a solid understanding of battery thermal management system architecture.
3. Ability to independently perform system-level thermal simulations. Proficient in at least one thermal simulation tool, such as STAR-CCM+, FloEFD, Fluent, FloTHERM XT, or Amesim.
4. Proficient in at least one CAD software package, such as CATIA, Creo, or AutoCAD.
5. Familiarity with thermal management control strategies for energy storage systems is preferred.
6. Strong cross-functional collaboration, organizational, and communication skills.
ESSRecruitment@jinkoess.com
1. Perform structural simulation and optimization for energy storage battery packs under lifting, transportation vibration, drop, crush, and cell expansion loading conditions.
2. Perform structural simulation and optimization for C&I energy storage systems under lifting, forklift handling, transportation vibration, wind, snow, and seismic loading conditions.
3. Perform structural simulation and optimization for energy storage containers under lifting, transportation vibration, wind, snow, seismic, NFPA 68 explosion venting, and classification society certification load cases.
4. Investigate and resolve structural issues identified during mechanical testing of energy storage systems.
5. Support structural design engineers in product design and structural optimization.
6. Interpret and apply structural strength standards for energy storage systems.
7. Develop and maintain simulation standards and material databases, and provide technical support to customer-facing teams on structural strength-related topics.
1. Bachelor’s degree or above in Mechanical Engineering or a related field.
2. At least 3 years of structural simulation experience in the energy storage industry.
3. Solid knowledge of structural simulation methodologies and relevant design standards for energy storage systems, with the ability to independently perform structural analysis and optimization.
4. Proficient in HyperMesh or ANSA for pre-processing, and structural simulation tools such as OptiStruct, Abaqus, or LS-DYNA.
5. Familiarity with welding processes and material forming technologies used in energy storage structures.
6. Strong teamwork and communication skills.
7. Experience with structural optimization methods, including topology, shape, and size optimization, is preferred.
8. Experience in simulation tool customization or automation development is preferred.
ESSRecruitment@jinkoess.com
1. Develop embedded software for energy storage PCS, including core control algorithms, HMI, and external communication.
2. Perform software requirements analysis, architecture design, coding, functional and performance testing, software validation, and technical documentation.
3. Commission product prototypes and investigate, troubleshoot, and resolve complex technical issues during product development and field deployment.
4. Manage software version control and software releases.
5. Collaborate with system engineers on competitive benchmarking and product definition.
6. Collaborate with system control engineers on the development and validation of advanced control algorithms.
7. Collaborate with hardware engineers on power device gate driver design.
8. Support PCS testing, certification, and product validation with hardware and test engineering teams.
1. Relevant degree in power electronics and drives, control engineering, computer science, electronic information, power systems, mechatronics or a related discipline. Previous project experience will be the primary consideration.
2. Senior/Principal roles: at least three years' development experience with energy storage PCS products; residential PCS experience is advantageous; master's degree or above.
Engineer roles: recent graduates with a bachelor's degree or above may be considered; graduates from leading universities are preferred.
3. Strong foundations in power electronics, control theory and power systems.
4. Good coding standards, technical documentation, communication and presentation skills.
5. Expert knowledge of PCS pre-charge, charge/discharge control, grid-connected control, stability control and protection for DSP-focused roles.
6. Strong embedded software development skills on DSP, ARM and/or FPGA/CPLD platforms; DSP and ARM capability are key requirements, although not necessarily in the same candidate.
7. Knowledge of converter topologies and control strategies including buck-boost, two-level full bridge, LLC, T-type/I-type three-level, HERIC and H5; the first two are essential for DSP-focused roles.
8. Knowledge of signal conditioning, PWM/SVPWM, single- and three-phase PLLs, and LC/LCL filters; not mandatory for ARM-focused roles.
9. Strong understanding of PCS communications with BMS, EMS and user interfaces.
10. Familiarity with RS485, CAN, Ethernet and USB, and protocols such as Modbus TCP.
11. Knowledge of processor peripherals and interfaces including ADC, DAC, SPI, UART and EMIF.
12. Familiarity with offline simulation tools such as MATLAB, Saber and PSCAD and with hardware-in-the-loop simulation.
13. Familiarity with peripheral, control-loop and power-stage hardware circuits.
14. Awareness of domestic and international energy storage product standards and grid codes.
ESSRecruitment@jinkoess.com
1. Design and develop PCS control circuits, including signal sampling/conditioning, DSP/ARM-based embedded hardware (FPGA/CPLD) and communications interfaces.
2. Define PCB solutions and layouts for PCS power circuits, including board-mounted power stages and gate-drive circuits for discrete IGBTs/MOSFETs, working with structural engineers for residential products.
3. Design, manage, standardise and maintain PCS schematic and PCB footprint libraries.
4. Conduct requirements analysis, architecture design, functional/performance test-case development, self-testing and documentation.
5. Work with system strategy, software and hardware teams to identify root causes and resolve complex field issues.
6. Support control-system architecture design and product iteration with system engineers.
7. Work with hardware engineers on the selection of board-mounted components.
8. Work with software engineers to implement and commission control strategies.
9. Work with test and hardware engineers to complete PCS testing and certification.
1. Relevant degree in power electronics and drives, electronic information, mechatronics, computer science, power systems, control engineering or a related discipline. Previous project experience will be the primary consideration.
2. Senior/Principal roles: at least three years' PCS product development experience. Experience in digital, mixed-signal, high-current and high-power PCB layout is preferred; residential PCS experience is advantageous; bachelor's degree or above.
Engineer roles: recent graduates with a bachelor's degree or above may be considered; graduates from leading universities are preferred.
3. Strong foundations in power electronics and mechanical design, with an understanding of power-system fundamentals.
4. Expert knowledge of digital and analogue electronics and circuit design, including signal conditioning and RS485/CAN/Ethernet/USB interfaces and common communications protocols.
5. Embedded hardware development experience on DSP, ARM and/or FPGA/CPLD platforms; DSP and ARM capability are key requirements, although not necessarily in the same candidate.
6. Proficiency in at least one schematic and PCB layout tool such as Cadence, Altium Designer, CAM or Mentor.
7. Strong knowledge of PCB layout standards, EMC/EMI design, PCB thermal design and thermal analysis.
8. Good knowledge of common electronic components and their supply chains.
9. Understanding of PCB and PCBA manufacturing processes.
10. Experience with circuit-simulation tools such as MATLAB, PSIM and Multisim.
11. Familiarity with gate-drive principles for discrete IGBTs and MOSFETs.
12. Familiarity with C/C++.
13. Understanding of converter topologies including buck-boost, two-level full bridge, LLC, T-type/I-type three-level, HERIC and H5.
ESSRecruitment@jinkoess.com
1. Lead converter control-algorithm and software-architecture development, with a strong understanding of converter electrical principles and control-platform hardware.
2. Build energy storage PCS simulation models and develop control algorithms using DSP and Simulink.
3. Simulate, validate and define PCS control strategies and algorithms.
4. Develop key technologies for parallel PCS operation, including carrier synchronisation, droop control, circulating-current suppression and grid-side control.
5. Develop voltage-source control strategies, including virtual synchronous machine and off-grid operation, weak-grid operation, resonance suppression and grid-oscillation mitigation.
6. Lead root-cause analysis and solution development for complex issues during development and in the field.
7. Apply real-time/HIL simulation and modelling tools such as ADPSS and PSCAD, and relevant energy storage power-station modelling standards.
8. Experience developing software for wind converters, PV inverters, variable-frequency drives or SVG systems is advantageous.
1. Relevant degree in power electronics and drives, control engineering, power systems, electronic information, computer science, mechatronics or a related discipline. Previous project experience will be the primary consideration.
2. At least five years' embedded software development experience, including energy storage converters, PV inverters or wind converters. Recent master's or PhD graduates may be considered for engineer roles; graduates from leading universities are preferred.
3. Strong foundations in power electronics, control theory and power systems.
4. Expert knowledge of PCS pre-charge, charge/discharge control, grid-connected control, stability control and protection.
5. Strong knowledge of PWM/SVPWM, single- and three-phase PLLs, LC/LCL filters, associated control strategies and component characteristics.
6. Ability to build system transfer-function models, perform control-theory-based stability analysis, and design and optimise stabilising control for LC/LCL filters.
7. Proficiency with MATLAB, Saber, PSCAD and similar offline simulation tools. Experience with model-based design and automatic code generation is preferred; C/C++ and HIL simulation experience are advantageous.
ESSRecruitment@jinkoess.com
1. Maintain, create and optimise relevant company process documents.
2. Ensure new products are introduced in accordance with company development processes such as APQP and IPD, and lead submission of customer quality-approval documentation such as PPAP.
3. Define stage-gate criteria during design and development and oversee their implementation.
4. Drive mitigation of risks where key development milestones fail to meet targets, verify corrective-action effectiveness, and review/escalate recurring issues.
5. Develop and implement advanced quality-assurance plans.
6. Participate in internal and external quality-system audits during R&D.
7. Conduct quality audits at each project development stage and drive issue resolution.
8. Liaise with customer quality teams during design and development.
9. Complete other duties assigned by management.
1. Bachelor's degree or above in science, engineering, chemistry or a related discipline.
2. Experience in lithium-ion batteries or energy storage is preferred.
3. Familiarity with ISO 9000 and the five core quality tools: APQP, PPAP, SPC, FMEA and MSA; strong analytical and statistical capability.
4. Familiarity with 8D, 5 Whys, the seven QC tools, FTA and other common quality methods.
5. At least three years' experience in advanced, project or R&D quality management, with excellent communication, presentation and organisational skills and the ability to work under pressure.
6. Conscientious, rigorous and detail-oriented, with strong analytical and problem-solving skills and the ability to work independently.
7. The ability to use English as a working language is preferred.
ESSRecruitment@jinkoess.com
1. Apply ISO 9000 and the five core quality tools—APQP, PPAP, SPC, FMEA and MSA—and common problem-solving tools including 8D, 5 Whys, the seven QC tools and FTA.
2. Translate R&D technical specifications into material quality-control priorities and prepare and maintain inspection documents.
3. Participate in advanced product quality planning, monitor product quality, and support trials of new materials and products.
4. Analyse out-of-control quality data and monitor compliance with quality standards during production.
5. Analyse recurring customer complaints or abnormalities, develop improvement plans and implement corrective actions.
6. Use quality tools to collect and analyse data and develop and implement improvement plans.
7. Drive continual product-quality improvement, QCC projects and cost-reduction initiatives.
8. Plan and promote quality-culture programmes.
9. Prepare product inspection control plans and FMEA analyses.
10. Maintain MES and corporate shared-drive records and compile weekly and monthly reports.
11. Train new employees to improve skills and professional capability.
12. Plan and prepare quality inspection/measurement equipment and laboratories in line with new-factory and production-line plans.
13. Complete other duties assigned by management.
1. Bachelor's degree or above.
2. Proficiency in Microsoft Office, including Excel and PowerPoint.
3. Experience in lithium-ion batteries or energy storage is preferred. Experience using relevant inspection and test equipment, or a manufacturing-process background, is advantageous.
4. At least three years' experience in shop-floor quality management, with excellent communication, presentation and leadership skills and the ability to work under pressure.
5. Conscientious, rigorous and detail-oriented, with strong analytical and problem-solving skills and the ability to work independently.
6. CET-4 or above; the ability to communicate with overseas customers is preferred.
ESSRecruitment@jinkoess.com
1. Support customers in analysing and handling quality issues arising on site and determine whether they are attributable to the company.
2. Train relevant customer personnel on products and repair precautions.
3. Lead on-site investigation, sorting, returns and replacements relating to customer complaints.
4. Organise analysis of customer complaints, issue improvement reports and, where required, present corrective-action plans.
5. Verify the validity and accuracy of customer claims.
6. Drive internal improvements arising from customer complaints.
7. Identify responsible suppliers for customer claims, confirm cost allocation and pass information to supplier management for chargeback.
8. Complete other duties assigned by management.
1. Bachelor's degree or above.
2. Experience in lithium-ion batteries or energy storage is preferred; proficiency with relevant quality inspection and test equipment is advantageous.
3. Familiarity with ISO 9000 and the five core quality tools: APQP, PPAP, SPC, FMEA and MSA; strong analytical and statistical capability.
4. Familiarity with 8D, 5 Whys, the seven QC tools, FTA and other common quality methods.
5. At least three years' experience in customer or process quality management, with excellent communication and presentation skills and the ability to work under pressure.
6. Conscientious, rigorous and detail-oriented, with strong analytical and problem-solving skills and the ability to work independently.
ESSRecruitment@jinkoess.com
