Development and manufacture of battery packs, chargers, power supplies and drive systems for mobile energy.
ANSMANN AG
Assamstadt (Headquarters) · Huizhou, Guangdong (CN) · Lieusaint (FR) · Bromma (SE) · Harlow (GB) · Kowloon (HK)New on Amplifa
About ANSMANN
ANSMANN AG is a family-owned technology company founded in 1991 by Edgar Ansmann, headquartered in Assamstadt (Baden-Württemberg). The company develops and manufactures custom battery packs, chargers, power supplies and drive systems for Li-ion, NiMH and lead-acid technologies and, according to its own figures, processes more than 28 million cells per year. Its service offering covers consulting, cell characterization, prototyping, series production, certification, international transport handling as well as disposal and recycling as a one-stop shop. An in-house UN test center in Assamstadt performs transport and safety testing according to UN 38.3; in addition, there is an automated SMD electronics production facility at the Huizhou site (China). Customers come from industries such as medical technology, garden equipment, e-mobility and drive technology. Around 400 employees work at seven sites worldwide, including sales companies in France, Sweden, the United Kingdom and Hong Kong.
- Site
- Assamstadt
- Processes
- UN transport testing of battery packs (altitude simulation in vacuum chamber, <115 mbar, 6 h), Thermal testing (10 temperature cycles -40 °C to +72 °C over 7 days in climate chamber), Shock testing (18 shocks, 150 gn, vibration generator), Vibration test (7–200 Hz, 3 h per axis, 3 axes), Short-circuit test (57 °C, 6 h; then 1 h short circuit), Overcharge test (1 day overcharge, 7 days monitored storage), Free-fall test (various drop heights and angles), Case stress test (70 °C ± 2 °C, 7 h)
- Materials
- Li-Ion (lithium-ion cells), NiMH (nickel-metal hydride), Lead (lead-acid), Lithium-ion cells, Nickel-metal hydride, Lead-acid
- Certificates
- DIN EN ISO 9001:2015, DIN EN ISO 14001:2015, DIN EN ISO 13485:2016, EcoVadis Silver Medal (overall score 73 points, 2025), TOP 100 seal (2023, 2024, 2025, 2026)
- Founded
- 1991
- Employees
- 400+
- Industries
- Medical technology, Garden equipment, E-mobility, Drive technology, Consumer electronics / batteries & chargers, Consumer electronics/batteries & chargers
- 01
Consulting & requirements analysis
- 02
Cell characterization in the laboratory
- 03
Development & design
- 04
Prototyping
- 05
Series production (battery packs, SMD electronics)
- 06
Certification & UN test center
- 07
Transport handling & distribution
- 08
After-sales, disposal & recycling
Cell Chemistries & Technologies
Lithium-ion cells
Primary cell chemistry for custom battery packs, chargers and drive systems.
Nickel-metal hydride
Proven cell chemistry for battery packs and chargers in a variety of applications.
Lead-acid
Used for battery solutions; gradual phase-out in the B2B segment planned by 2026.
Sites
Assamstadt
DEHeadquarters, battery pack production (since 2010), UN test center, SMD manufacturing
- Lot size
- Prototype to series
- Materials
- Li-Ion, NiMH, Lead
- UN test center: vacuum chamber (altitude simulation)
- Climate chamber
- Vibration generator (shock/vibration testing)
Huizhou, Guangdong
CNProduction, logistics, R&D, QA
- Automated SMD production line
Lieusaint
FRSales (ANSMANN ENERGY FRANCE SARL)
Bromma
SESales (ANSMANN NORDIC AB)
Harlow, Essex
GBSales (ANSMANN UK LTD.)
Kowloon, Hong Kong
CNSales (ANSMANN ENERGY INTERNATIONAL LTD.)
Components & Products
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| UN transport testing of battery packs (altitude simulation in vacuum chamber, <115 mbar, 6 h)Testing | – | – | – | – | Li-Ion, NiMH, Lead |
| Thermal testing (10 temperature cycles -40 °C to +72 °C over 7 days in climate chamber)Testing | – | – | – | – | Li-Ion, NiMH |
| Shock testing (18 shocks, 150 gn, vibration generator)Testing | – | – | – | – | Li-Ion, NiMH |
| Vibration test (7–200 Hz, 3 h per axis, 3 axes)Testing | – | – | – | – | Li-Ion, NiMH |
| Short-circuit test (57 °C, 6 h; then 1 h short circuit)Testing | – | – | – | – | Li-Ion, NiMH |
| Overcharge test (1 day overcharge, 7 days monitored storage)Testing | – | – | – | – | Li-Ion, NiMH |
| Free-fall test (various drop heights and angles)Testing | – | – | – | – | Li-Ion, NiMH |
| Case stress test (70 °C ± 2 °C, 7 h)Testing | – | – | – | – | Li-Ion, NiMH |
| RoHS testingTesting | – | – | – | – | – |
| EMC testing (electromagnetic compatibility)Testing | – | – | – | – | – |
| Burn-in test (reliability test for detecting component failures)Testing | – | – | – | – | – |
| In-circuit test (electronics manufacturing)Testing | – | – | – | – | – |
| Cell characterization (laboratory, charge/discharge parameters)Testing | – | – | – | – | Li-Ion, NiMH, Lead |
| Battery pack development and manufacturing (prototyping & series production)Assembly | – | – | – | Prototype – Series | Li-Ion, NiMH, Lead |
| Automated SMD manufacturing (electronics manufacturing)Assembly | – | – | – | – | – |
| Development & manufacturing of chargers (Li-ion, NiMH, induction, lead; protocols CAN, I2C, SM,Assembly | – | – | – | – | Li-Ion, NiMH, Lead |
| Development & manufacturing of power suppliesAssembly | – | – | – | – | – |
| Drive systems (motors and battery packs as a system)Assembly | – | – | – | – | Li-Ion, NiMH |
| OEM / private-label manufacturing (batteries, pen lights, headlamps, work lights, chargers)Assembly | – | – | – | – | – |
| Disposal & recycling of batteriesSurface | – | – | – | – | Li-Ion, NiMH, Lead |
| International distribution and transport service / after-salesEngineering | – | – | – | – | – |
4 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Vacuum chamber (altitude simulation) | – | – | – | – | Assamstadt (UN test center) |
| Climate chamber | – | – | – | – | Assamstadt (UN test center) |
| Vibration generator (shock/vibration testing) | – | – | – | – | Assamstadt (UN test center) |
| Automated SMD production line | – | – | – | 2021 (Auto | China (Huizhou) |
Additional services
Quality & Certification
An in-house UN test center in Assamstadt performs altitude simulation, thermal testing, shock, vibration, short-circuit and overcharge tests as well as RoHS, EMC, burn-in and in-circuit tests. Upon successful testing, a certificate according to UN Manual 38.3 or IEC 62133-2:2017 is issued.
| Evidence | Assamstadt | Huizhou, Guangdong |
|---|---|---|
| DIN EN ISO 9001:2015 | ||
| DIN EN ISO 14001:2015 | ||
| DIN EN ISO 13485:2016 |
Chronicle & Milestones
- 1991
Company founded as ANSMANN Accu-Technik GbR by Edgar Ansmann
- 1996
Industrial solutions: the first industrial projects
- 2007
Founding of ANSMANN China – logistics, production, R&D & QA
- 2010
Establishment of battery pack production in Assamstadt
- 2012
Opening of the in-house UN test center
- 2014
Certification according to ISO 13485 (medical)
- 2015–2018
Expansion & automation of production
- 2020
Certification of environmental management DIN EN ISO 14001:2015
- 2021
Automated SMD production in China
- 2022
Innovation award with the "BioBattery" project
- 2023
TOP 100 seal for innovation excellence
- 2026
TOP 100 seal for the fourth time; nominated for the German Sustainability Award 2026