These units can be easily installed and are compatible with the Orion BMS to ensure that your batteries are properly protected. We recommend using the Tesla BMS Boards from our EVolve Electrics store. These units are not readily available or properly understood. Communication with the original BMS boards is mostly experimental and not fully tested. The original BMS boards alone can only monitor and balance the cells. The Original Tesla BMS Boards require the Master Tesla BMS board to protect the batteries. Any battery with a SOH below 70% is considered unsafe for high C-rate automotive applications and should be used exclusively for stationary storage applications.ĭo I need a Battery Management System if I keep the Original Tesla BMS Boards? The only variable that will affect its applicability is the measured SOH. This comes down to the actual application but in short, the answer is typically yes. If parallel strings are present it is absolutely necessary to use a battery management system per parallel string in a master/slave configuration to ensure that each parallel string is being properly protected.Ĭan I use Used Tesla Model S Batteries in my electric vehicle conversion? Please read the attached documentation that explains parallel strings in more detail. Yes, however, you should consider that in doing so your system will consist of parallel strings. Yes, we provide load testing/ capacity testing at a rate of $225.00 per Tesla Model S Battery.Ĭan I connect my Tesla Model S Batteries in parallel? We have seen modules with 50,000 miles perform worse than modules with 80,000 miles likely because of some of the variables listed above.ĭo you provide load testing/ capacity testing? The only way to understand the actual SOC of a battery is to load test it at an appropriate C-rate (rate of time in which it takes to charge or discharge) and to measure the current over time. The key takeaway is that mileage alone provides very little information about the actual battery state of health. Fast charging creates a lot of heat that has the potential to shorten the life of your battery, slow charging/ trickle charging means less heat and potentially a healthier battery long term. When charging and discharging your batteries the internal resistance in each cell creates heat. Fast Charging refers to using a rapid charger that is much faster than your average electric vehicle charger. Trickle Charging refers to charging a fully charged battery at a rate equal to its self-discharge rate, thus enabling the battery to remain at its fully charged level. One should also consider how the batteries were charged. Total cycles measured in miles is only one variable needed to determine the battery SOH. The only information we are given when purchasing Used Tesla Model S batteries is the mileage, normally these batteries have around 50,000 miles. We cannot provide any estimations on the remaining life of these batteries. How much battery life do these modules have left? This is more valuable information than the year and miles of the vehicle that the batteries were removed from since it represents the true usable capacity of the battery devoid of any assumptions. If you would like a more comprehensive overview we do offer capacity testing for $225/ module which will let you know what the SOH of the batteries are and their capacity at C/3. We verify a healthy resting voltage is present on each of the series connections. We don't provide a warranty on Used Batteries due to the uncertainty of how these batteries were maintained and what their current SOH (State of Health) is. These batteries have been pulled from wrecked Tesla Vehicles.ĭo you provide a warranty on Used Tesla Batteries? Tesla Model S Batteries are Used Lithium-Ion batteries that are based around 444 Panasonic NCR18650B cells running in a configuration of 6s74p. Understanding Used Tesla Model S Batteries Maximum Discharging Current (10 sec.):750 AmpsĬlick here to download the Tesla CAD Model Please read "Understanding Used Tesla Model S Batteries" below for further explanation.Ĭharge voltage cut-off: 4.2V/Cell, 25.2V/Moduleĭischarging cut-off: 3.3V/Cell, 19.8/Module These rates only apply to a commercial address that does not require a lift-gate upon delivery.Ĭontact our sales team at if you have any shipping-related questions. Please note: These rates are only to ship to an address within the USA. Shipping 6 or more Tesla Batteries: Call for a custom rate You can find your closest FedEx Freight Service Center by clicking here. If you would like to have these batteries shipped to a residential address an additional $200.00 residential freight delivery fee will be added to your order prior to shipping. All Tesla Batteries will be shipped to your closest FedEx Freight Service Center if the shipping address is a residential address.
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