Oximeter Battery ODM

Specification of Oximeter Battery

Automatic Battery Protection Module/System

Low Voltage Disconnect

Over Voltage Disconnect

Short Circuit Protection

Reverse Polarity Protection

Cell Balancing

Why should the Oximeter use the Ni-MH battery to power it?

Using Nickel-Metal Hydride (Ni-MH) batteries to power an oximeter is advantageous for several reasons, making them a suitable choice for this medical device. Here are the key benefits of using Ni-MH batteries in oximeters:

1. Environmentally Friendly

· Ni-MH batteries are more environmentally friendly compared to older technologies like Nickel-Cadmium (NiCd) batteries. They do not contain toxic heavy metals like cadmium, making them easier to recycle and dispose of without harming the environment.

2. High Energy Density

· Ni-MH batteries have a higher energy density than NiCd batteries, meaning they can store more energy in a smaller size, which is essential for portable medical devices like oximeters. This allows the device to run for a longer period without needing frequent battery replacements.

3. Rechargeability

· Ni-MH batteries are rechargeable, making them cost-effective for powering oximeters over time. Instead of constantly replacing disposable batteries, healthcare professionals and users can simply recharge the batteries, reducing operating costs and waste.

4. Safe and Reliable

· Ni-MH batteries are known for their safety and reliability. They have a lower risk of overheating or causing fires compared to some lithium-ion batteries, making them a safer option for sensitive medical equipment like oximeters that monitor vital signs.

5. Steady Voltage Output

· Oximeters require consistent and stable power to function accurately. Ni-MH batteries provide a steady voltage output over their discharge cycle, ensuring the oximeter operates reliably and delivers accurate readings.

6. Widely Available and Cost-Effective

· Ni-MH batteries are widely available and generally more affordable than some other rechargeable battery types. Their cost-effectiveness makes them an excellent choice for powering consumer and professional-grade oximeters alike.

7. Good Capacity for Portable Devices

· Ni-MH batteries offer a decent capacity and are capable of powering portable medical devices like oximeters for extended periods. This is particularly important for healthcare providers and patients who need continuous monitoring without frequent battery replacements.

8. Reduced Memory Effect

· Compared to older NiCd batteries, Ni-MH batteries have a significantly reduced memory effect. This means the battery's capacity does not diminish as much when it is recharged before being fully discharged, which helps maintain its longevity and effectiveness in powering the oximeter.

9. Works Well in High-Drain Devices

· Oximeters are considered low- to moderate-drain devices. Ni-MH batteries perform well in such applications, providing a consistent energy flow without losing efficiency quickly, which is crucial for reliable medical monitoring.

10. Safe for Use in Medical Environments

· Ni-MH batteries have a proven track record in medical devices because they are less prone to thermal runaway (which can lead to fires or explosions) compared to some lithium-ion chemistries. This makes them a dependable option for use in critical environments like hospitals or home healthcare settings.

Conclusion

Ni-MH batteries are a great option for powering oximeters due to their rechargeability, high energy density, environmental friendliness, and safety. These features make them an ideal power source for ensuring that the oximeter can operate efficiently and reliably in both professional healthcare and home settings.

How to customize your oximeter battery pack?

Customizing an oximeter battery pack ensures that the power source fits the device's specific needs in terms of energy efficiency, size, and safety. Here is a step-by-step guide on how to customize your oximeter battery pack:

1. Understand Device Requirements

· Voltage: Identify the voltage requirements of the oximeter (typically 1.5V or 3V, depending on whether it's powered by AA, AAA, or coin cell batteries). The voltage of the battery pack must match the device’s needs.

· Capacity (mAh): Consider the capacity requirements in milliamp-hours (mAh). Higher capacity allows the device to run for longer periods between recharges or battery replacements.

· Size and Form Factor: Determine the size and space available for the battery pack inside the oximeter. Custom batteries must fit into the available compartment without compromising the device’s portability or usability.

2. Select the Battery Chemistry

· Nickel-Metal Hydride (Ni-MH):

Popular for small, rechargeable oximeters.

Safer and more environmentally friendly compared to Nickel-Cadmium (NiCd).

Moderate energy density, which is ideal for small medical devices.

· Lithium-Ion (Li-ion):

Higher energy density, offering longer operating times between charges.

Lightweight and more compact, allowing for smaller battery packs in portable oximeters.

Requires careful management for safety due to the potential for overheating.

· Lithium Primary Cells (Li-MnO2 or Li-SOCl2):

For non-rechargeable applications where long shelf-life is important.

Provides high capacity and stable voltage, suitable for low-power devices like oximeters.

· Alkaline Batteries:

Standard, non-rechargeable options that are inexpensive and widely available.

Suitable for low-drain oximeters where rechargeability is not a priority.

3. Decide on Rechargeable vs. Non-Rechargeable

· Rechargeable: Opt for Ni-MH or Li-ion if the oximeter is used frequently and requires the convenience of recharging.

· Non-Rechargeable: Alkaline or Lithium Primary Cells are ideal for low-use devices or backup applications where long shelf life and immediate availability are more important than rechargeability.

4. Determine Battery Configuration (Series or Parallel)

· Series Configuration: Connect cells in series to increase the voltage output. For example, connecting two 1.5V cells in series provides a 3V output.

· Parallel Configuration: Connect cells in parallel to increase the overall capacity (mAh) without changing the voltage. This is useful if the device needs longer operational time between charges.

5. Choose a Battery Management System (BMS)

· A Battery Management System (BMS) is critical for safety and performance in rechargeable battery packs. The BMS should include:

Overcharge Protection: Prevents damage from overcharging.

Over-discharge Protection: Prevents the battery from discharging below safe levels.

Temperature Monitoring: Ensures the battery operates within safe temperature limits, especially important for Li-ion batteries.

Short-circuit Protection: Protects the device and battery pack in case of a short circuit.

6. Size and Form Factor Customization

· Shape and Size: Ensure the battery pack fits perfectly within the oximeter’s compartment. You can customize the shape to optimize space, making the device more compact and lightweight.

· Weight Considerations: For portable oximeters, keeping the battery pack light is essential to maintain ease of use and comfort for patients.

· Custom Enclosures: Design the battery pack with a durable enclosure that fits securely inside the oximeter, protecting it from drops, dust, and other environmental factors.

7. Thermal Management

· Heat Dissipation: Proper thermal management is important, especially if the oximeter is used continuously for long periods. The battery pack should have adequate ventilation or incorporate heat-dissipating materials.

· Temperature Sensors: For safety, integrate temperature sensors in the battery pack to monitor heat levels, particularly for Li-ion chemistries, which are more sensitive to overheating.

8. Select Battery Connectors

· Connectors and Wiring: Choose appropriate connectors for the battery pack, ensuring secure and easy connection with the oximeter’s internal circuitry. Ensure that the connectors are durable and can withstand frequent use.

· Polarity Protection: Integrate features that protect against incorrect polarity connections to avoid damaging the oximeter or battery.

9. Safety Certifications

· Ensure the battery complies with necessary safety standards for medical devices. This might include:

UL 1642 Certification for lithium batteries.

IEC 62133 Certification for safety in portable medical devices.

UN 38.3 for ensuring batteries are safe for transport, especially if they are rechargeable and will be used in a medical setting.

· Medical-Grade Compliance: Follow any applicable medical-grade standards to ensure that the battery is safe for use in healthcare environments.

10. Energy Efficiency

· To maximize the performance of the oximeter, ensure the battery pack is optimized for energy efficiency. This may include low self-discharge features or ensuring that the battery chemistry has low internal resistance to maximize runtime.

11. Test the Custom Battery Pack

· Prototype Testing: Build a prototype battery pack and test it in the oximeter to ensure it meets all operational needs, including:

Voltage Stability: Ensuring the device receives consistent power.

Capacity Testing: Verifying the battery can provide sufficient runtime for expected use.

Safety Testing: Checking that all safety systems (BMS, temperature sensors, etc.) function correctly.

12. Choose a Reliable Manufacturer

· Work with a trusted battery manufacturer that specializes in custom medical battery packs. Provide them with detailed specifications, including voltage, capacity, form factor, and safety requirements, to ensure the battery pack is designed to your oximeter’s needs.

Summary of Customization Steps:

1. Understand the oximeter's power needs (voltage, capacity, size).

2. Choose the battery chemistry (Ni-MH, Li-ion, lithium primary, etc.).

3. Decide on rechargeable vs. non-rechargeable options.

4. Configure the battery pack (series or parallel arrangement).

5. Add a Battery Management System (BMS) for safe operation.

6. Customize the form factor to fit the device.

7. Ensure proper thermal management to prevent overheating.

8. Select appropriate connectors and wiring for the battery pack.

9. Ensure compliance with medical safety certifications.

10. Test the custom battery pack for functionality, efficiency, and safety.

By following these steps, you can create a custom battery pack tailored to your oximeter, ensuring reliable, safe, and long-lasting power for medical applications.