Wemhoner, Geman patent DE 3,742,312, describes a circuit in which a comparator actuates a relay subsequently to changing its state. FIG. 12V Battery Excessive Over Discharge Protection Controller 30A Switch Module Car. The second state shows how the threshold level is raised each time the timer reaches its time delay. The invention protects against battery discharges that occur due to operator neglect. Thanks for your Query. While the invention is susceptible to various modifications and alternate forms, specific embodiments thereof have been shown by way of example in the drawings and will herein be described in detail. If you already have a multi-safer or power magic pro hardwiring kit, one way to combat this is to set a timer function so that the kit only supplies power for a set period of time after the car is turned off (e.g., 6 hours or 12 hours) which will limit how much of the vehicle's battery the dash cam can drain. 1) An Australian Visa or Mastercard debit/credit card; 2) To be over 18 years of age; 3) To live in Australia, To see Afterpay's complete terms, visit https://www.afterpay.com.au/terms, Projecta Car Battery 12V Dual Battery Discharge Protector. Hence, if you never want to deep cycle your battery the cutoff needs to be 80% or 90%. Sloan also teaches the use manual override switches, and engine running indicator override for critical loads. These parameters are recorded over time and facilitate enhanced fuel economy, reduced pollution etc.. Repair shops take special precautions not to power down these circuits during repair. View cart for details. Reproduction is prohibited other than in accordance with the copyright notice, which forms part of these terms and conditions. One object of this invention is to provide a battery safety switch which prevents inadvertent battery drainage of a vehicular battery, thus extending the expected battery life. This system utilizes two loads for the purpose of sensing a voltage drop across the second load subsequently to turning the ignition on. {"modules":["unloadOptimization","bandwidthDetection"],"unloadOptimization":{"browsers":{"Firefox":true,"Chrome":true}},"bandwidthDetection":{"url":"https://ir.ebaystatic.com/cr/v/c1/thirtysevens.jpg","maxViews":4,"imgSize":37,"expiry":300000,"timeout":250}}. Additional delivery time may result for some deliveries. Nos. Another object of the present invention is to provide a battery safety switch that, subsequently to cut-off, returns to its conducting state only when reset by the ignition switch. 3 shows a flow graph representation of a preferred process implementation of the present invention. This invention is more particularly related to an automatic electric safety switch that prevents accidental or excessive battery discharges in automotive applications, beyond a level where the vehicle can be safely started. A relay is disengaged subsequently to detecting a battery voltage that is of lower magnitude than the reference. 3 illustrates a so called signal flow graph of the process implemented by the battery safety switch. This system does not give any preferential treatment to any circuit in the electrical system, it has in fact no direct interaction at all with any of the circuits in the electrical system. It is hence, apparent that only 8 V are required in a 12 V system to guarantee engagement of the battery safety switch, 1. Once turned off they remain inoperable until the vehicles motor has been restarted. The limiting factor here is thus the so called drop-out voltage of the relay, 20. the current-time product. This fuse provides a suitable location for the ignition switch connection, 50. Overall, they are a reasonable device to consider but not 100% necessary depending on your driving behavior and battery condition. Zener diodes are unsuitable to most battery applications due to their high power consumption. Such operator neglect includes inadvertent use of electrical circuits such as headlights, parking lights, or interior lights subsequently to turning the ignition off. We do not share email or address information with other businesses or organisations. His invention also utilizes a timer. a select few circuits in a vehicle with insufficient protection. The fuses of interest are those that connect to circuits such as head lights, parking light, interior lights, or the cigarette lighter. The degree of recovery is proportional, or at least dependent, on the magnitude of the load. * Freight delivery times stated are for average volume items with total order weight under 5kg for metro areas in eastern states. The battery safety switch maintains this state as long as the battery voltage is greater than the current threshold. Raising the threshold level makes the circuitry of the battery safety switch, 1, become more sensitive to noise. Please allow extra time for delivery to western states. Unless required to do otherwise by law, we only collect your information in order to provide you with the information and services which you request. The voltage reference, 2, provides the comparator, 4, with a stable supply voltage. The first terminal, 14, connects to the positive battery pole, and the second terminal, 16, to the ground or negative battery pole. 5,140,250 teaches the use of a charge indicator, i.e. Copyright 2022 BlackboxMyCar. The ignition switch also maintains the reset condition so long it is turned on. No. The automatic safety switch further comprises safety features that prevents it from turning off during reset, even if the battery voltage would diminish to an extremely low voltage. The second state is entered each time the timer reaches its preset time delay, normally between 4 and 12 hours. This equates to a voltage cut-off of around 12.4V. Oka et al., U.S. Pat. The following table estimates the voltage associated with a typical 12V lead acid batterys percentage charge for a variety of temperatures. Several late model vehicles make such an extensive use of power accessories that an additional fuse box is deemed necessary. - your ISP address Thus, the function of the solenoid is substantially independent of the battery voltage. We will only send further information to you in the future if it is explicitly requested. Information collected for Statistical Purposes, When you look at the tools.com website, we may record the following information for statistical purposes: No. Parking lights require full functionality while the vehicle is left unattended with the ignition switched off. Many people would argue that a battery discharge prevention device is necessary however this depends on 2 factors. A timer is also reset when the ignition is turned off. This third state is maintained even if the battery recovers slightly and increases its voltage above the threshold value. Welcome to tools.com, If you continue to browse and use this website, you are agreeing to comply with and be bound by the following terms and conditions of use, which together with our privacy policy govern tools.coms relationship with you in relation to this website. For example, the memory of engine management systems (varying degrees of microprocessor control of ignition, fuel injection, etc.) Rickey, U.S. Pat. If you will not be driving your vehicle for a few days, you could unplug your dash cam to prevent battery discharge. Thus, it is necessary to give preferential treatment to various circuits in the electrical system of an automobile. If your battery protection device cut-off is 12V or 12.2V, the battery will deep cycle if it hits this number reducing the life expectancy of the battery. However, this potential unpredictability is immaterial since the second diode, 32, provides a separate current path to the relay solenoid, 22. The second factor is your car batterys condition. We are currently experiencing an increased volume of online orders, along with delays and general congestion within our freight and logistic networks. This offer is subject to the following terms and conditions: The offer is for online orders only. Applies to Standard Shipping only. This may exclude: Indent and backordered lines High demand low stocked items Specialty or promotional items Spare parts Gift cards Offer may exclude bulky or dangerous goods, like: Fridges Generators 3D Printers The terms of this service may change at any time. This offer excludes Click & Collect only items. The automatic safety switch is connected as close to the fuse box as possible, since all necessary connection points are available in the immediate vicinity of the fuse box. It should be noted that the battery is protected from being depleted of charge to such an extent that permanent damage occurs. The present invention is directed to overcoming one or more of the problems set forth above. Recharging the battery to its nominal 13 V range is easily accommodated by the alternator in the vehicle that the battery is installed in. Another object of the present invention is to provide a battery safety switch that exhibits a threshold level for cut-off that ensures that the vehicle can safely be started subsequent to cut-off. Very few battery protection devices have this setting. The threshold is momentarily raised. The interior light also has many other usages in addition to the mere examples given here. - the previous site you have visited The battery safety switch, 1, does not include the starter motor in any of its circuits. Small electrical loads disturb the chemical equilibrium of a battery by only a small amount--hence, only a minimal recovery is to be expected. We will only collect information about you with your consent. Freight will be charged at checkout for these items. Unfortunately this is not a clear cut question. We are no longer offer the multi-safer as we feel that the BlackVue Power Magic Pro or our BlackboxMyCar Hardwiring Kit are better hardwiring options for our customers. All connections can either be made to the fuse box itself, or to points in the immediate vicinity of the fuse box. The ignition switch unconditionally resets the automatic safety switch. This level is normally in the range from 2 V to 5 V for relays that are suitable for this type of applications. This second threshold is necessary since batteries do not recover as much when disconnected from low loads as when disconnected from high loads. Use with portable fridges, air compressors and flood lights. It is subject to change without notice. Each time the timer reaches the preset time limit the voltage reference is momentarily increased from the first to the second voltage level. We love what we do, because we're here to help you make the most informed purchasing decision. It is not sensitive to small current drains that may be caused by, for example, the interior lights. The voltage reference, 2, defines a stable voltage that is substantially smaller than the battery voltage. 4,493,001, was essentially an original equipment device because of the large number of connections required in the automobile. No. Von Brimer, U.S. Pat. Von Brimer also teaches the use of a manual reset switch that requires special user intervention. As much a six hours may be required for a battery to fully complete its recovery after being disconnected from a heavy load. This, and related, problems have been recognized and various attempts with varying degrees of success have been made to solve them. The third terminal, 24, connects to external loads. The internal circuitry of the battery safety switch is powered by the relay itself. You acknowledge that such information and materials may contain inaccuracies or errors and we expressly exclude liability for any such inaccuracies or errors to the fullest extent permitted by law. This reduces the chances of incurring permanent battery damage from excessive discharge. Use a Cellink NEO Battery Pack to protect your car's battery and prevent battery discharge today. ** total_quantity ** | ** unit_price ** / ** unit_measure **. A first resistor, 6, forms a first voltage divider with a second resistor, 8, and the voltage reference, 2. Find an accessory to get more out of it. This type of recovery does not mean that the battery recharges itself, but only that its internal chemical processes reach equilibrium. Other car makes have the cigarette lighter wired to the ignition. The automatic safety switch comprises circuitry that impedes a current flow to its protected output loads when the battery voltage has diminished to a minimum voltage that can safely start a vehicle. 5,159,257, teaches the use of a system that protects a vehicular battery from being drained by auxiliary equipment. In this event, all loads that are connected to the battery via the battery safety switch, 1, are disconnected by the relay, 20. He also teaches the use of a voltage multiplier to provide the necessary drive power for MOSFET transistors in a "high side switching configuration" where the source of the transistor is not referenced to ground. No. Premium freight is not available on oversized/bulky items or in all locations. Make 4 payments of $9.18 over 8 weeks and get it now! Moreover, some loads are extremely unsuitable to disconnect from the battery. We believe you have a right to know about what information organisations have about you. These include and are not limited to: explosives, radioactive materials, flammable liquids, dangerous or volatile chemicals, strong acids, compressed gases, poisons and aerosols. Hence, the function or installation of the battery safety switch should not change significantly, if at all, with the addition of a second external fuse box in a vehicle. For example, a voltage cut-off of 11.6 is equal to a completely dead battery when it is warmer than 57 degrees F or 14 degrees C. Really not a good cut-off in most conditions but some devices have this setting or lower. Items that can contain these materials include battery banks, aerosols, some tools and lithium batteries. For example, opening the car door may be enough to trigger the comparator, 4, to turn the relay, 20, off. Otherwise, the third state is entered. The battery recovery is recognized by a slowly increasing battery voltage. All orders placed over the weekend will be processed on Tuesday, Aug 2. Another object of the present invention is to provide redundant circuitry where alternate current paths provide the relay coil with current in the event of circuit failure. Another object of the present invention is to provide a fail-safe operating mode where the cut-off level of the relay is substantially independent of the battery voltage. 2) The operator returns to the vehicle and switches the ignition on. This invention is connected in series with at least one of the power cables connecting the battery to the fuse box of a vehicle. Try out our dash cam buyer's guide to start your journey. This threshold is normally set to approximately 11 V in 12 V systems, which allows a vehicle to be safely started. Lead-acid starter batteries begin to get damaged when the nominal no-load voltage is decreased below approximately 12.1 V. This second threshold voltage level is necessary due to the small battery recovery expected from loads. This threshold is, as mentioned above, approximately 11 V in a 12 V system. In this state, vehicles equipped with this device function identically to those vehicle that ar not equipped with this device. Something went wrong. Limitation is based exclusively on the elapsed time from when the engine is turned off. No. The ignition switch connection forces the battery safety switch, 1, to always be in an energized or engaged state while driving the vehicle. However, Gayler does not teach any differentiation among the various circuits in the electrical system. The heavier the load the more a battery recovers. The timer, 28, raises its output voltage only momentarily, to reduce the chances of forcing the relay, 20, to turn off in error. - your top level domain name (for example .com, .gov, .au, .uk etc) This re-energizes the same loads that were earlier turned off by the battery safety switch. Free format text: The addition of the second fuse box does not significantly change those circuits protected by the original, or internal, fuse box.