the ignition switch energizes the relay regardless of any other condition or event. The internal circuitry of the battery safety switch is powered by the relay itself. The multi-safer is a great option for vehicles that have an auto start/stop feature which turns off the engine at stop lights to reduce fuel consumption as it can be wired solely to a constant powered fuse if timer function isn't needed. Additional delivery time may result for some deliveries. The additional, or second, fuse box is normally in command of accessories requiring large amounts of power, such as electric windshields etc.. - the type of browser you are using. Oka et al., U.S. Pat. The ignition switch connection forces the battery safety switch, 1, to always be in an energized or engaged state while driving the vehicle. The preferred location for installation of the battery safety switch, 1, is as close to the fuse box, 44, as possible. This state maximizes noise immunity. New to dash cams? the current-time product. Additional delivery time may result for some deliveries. 4,137,557 and 4,088,940 also distinguish between essential and nonessential loads in their respective wiring. The voltage across the relay solenoid, 22, is maintained by the transistor switch, 18. 1. No. Further, the interior lights would be rendered useless if they would not turn on when vehicle doors are opened. A fourth terminal, 34, facilitate this connection. They do not signify that we endorse the website(s). 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. We do not automatically insure unless you specify it during the checkout. An automatic battery safety switch comprising: A voltage reference having a reference voltage, a battery having a voltage, a comparator, a timer, said voltage reference being coupled to said comparator wherein a voltage threshold is established, said comparator being further coupled to a voltage divider that provides a fraction of said battery voltage, said comparator being responsive to a difference between said fraction of said battery voltage and said voltage threshold by means of generating a first state of a first signal, said first state of said first signal being coupled to a switching means in the event that said fraction of said battery voltage is greater than said voltage threshold, said switching means responding to said first state of said first signal by providing an electrical connection between said battery and at least one load; said switching means responding to a second state of said first signal by terminating said electrical connection between said battery and said at least one load when said fraction of said battery voltage is less than said voltage threshold, said second state of said first signal being indicative of a depleted battery; Said timer intermittently raising said voltage threshold, said raised voltage threshold causing termination of said electrical connection between said battery and said at least one load in the event at least one small load is excessively draining said battery, said at least one small load comprising the automatic battery safety switch. Neither we nor any third parties provide any warranty or guarantee as to the accuracy, timeliness, performance, completeness or suitability of the information and materials found or offered on this website for any particular purpose. Copyright 2012 - 2022 BlackboxMyCar. The voltage level where a relay becomes energized is the so called pull-in voltage, and is normally approximately 7 V in automotive systems. We are currently experiencing an increased volume of online orders, along with delays and general congestion within our freight and logistic networks. The second voltage divider defines a fractional voltage based on the battery voltage. Copyright 1995-2022 eBay Inc. All Rights Reserved. The voltage threshold at which this device disconnects non-essential loads is modified by the rate of discharge from the battery. The item you've selected was not added to your cart. The heavier the load the more a battery recovers. Some cases involve auxiliary equipment powered from, for example, the cigarette lighter plug. Make 4 payments of $9.18 over 8 weeks and get it now! It is however, impossible to prevent all accidental discharges by wiring changes alone. For example, opening the car door may be enough to trigger the comparator, 4, to turn the relay, 20, off. 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. Turning now to FIG. The second state shows how the threshold level is raised each time the timer reaches its time delay. 2) The operator returns to the vehicle and switches the ignition on. The first delay disregards temporary battery sags and the second delay eliminates sporadic transients emanating from door contacts etc.. Sheldrake also teaches the use of thresholds that are modified by a nominal current drain of various loads. The voltage reference, 2, becomes incapable of maintaining a regulated output voltage when the difference between the battery voltage and the rated regulator voltage becomes insignificant. 12V 3A Timer Module 2 Seconds to 23 minutes. Raising the threshold level makes the circuitry of the battery safety switch, 1, become more sensitive to noise. Hence, if you never want to deep cycle your battery the cutoff needs to be 80% or 90%. Our office is closed on Monday, Aug 1. The interior light also provides some degree of security in that it allows a vehicle operator to inspect the passenger compartment of the vehicle prior to entering. PROJECTA ODP500 BATTERY DISCHARGE PROTECTOR. 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. Narva Cigarette Plug Accessory Adapter 12V 12 24 V, Dual Surface Mount Cigarette and Twin USB Charger, Narva Flush Mount Merit Socket 12V DC Adapter, Narva 81056Bl Dual Cigarette Lighter & Usb Sockets, PARKSAFE Mercedes Benz LED Headlights Upgrade, Narva Dual Heavy Duty Merit Sockets Twin Fridge 12, Copyright 2022 TOOLS.COM PTY LTD Free format text: Wemhoner, Geman patent DE 3,742,312, describes a circuit in which a comparator actuates a relay subsequently to changing its state. However, there are no reset features and the systems themselves are allowed to drain the battery even though non-essential loads are disconnected. No. Help other tools.com users shop smarter by writing reviews for products you have purchased. 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. The interrupting voltage is adjustable from 10.4 to13.3 VDC. Contact us using the form below and we'll get back to you as soon as we can. This system does, however, provide for ease of installation but at the expense of versatility and cost. The parking lights, on the contrary, cannot be wired into the ignition circuit; an operator must be able to leave his vehicle unattended with the parking lights on. If you wish to insure, it will cost $1 for every $100 value or PART THEREOF. A ground terminal, 48, of the battery safety switch, 1, is connected to chassis ground, i.e. A current limiting circuit, 25, measures the current through the shunt resistor, 19, and maintains a current less than or equal to a preset limit. The majority of ourlogistics providers deliver to parcel lockers around Australia. The Australian PCT application AU89/00249, and the U.S. Pat. Unfortunately, this is resulting in delays getting some of your orders delivered to you on time. Zener diodes are unsuitable to most battery applications due to their high power consumption. The ignition switch unconditionally resets the automatic safety switch. The comparator is controlled by a voltage reference and by the voltage from the battery that the relay protects. View cart for details. 3 illustrates a so called signal flow graph of the process implemented by the battery safety switch. This load connection, 47, attaches to one or more fuses in the fuse box. on vehicle, Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. We will provide you with the opportunity to unsubscribe from any future electronic communication. It is therefore, possible for the battery safety switch, 1, to remain in its low threshold voltage state most of the time. This level may be between 0.5 V and 3 V depending on the particular voltage reference chosen. These linked sites are not under the control of tools.com, and we are not responsible for the conduct of companies or organisations linked to our website. We will not disclose your personal information to any individual, company or organisation (except as required by law). The relay, 20, controls the current flow from the battery, not shown, to external loads, not shown. In addition, the battery safety switch is maintained in the first state as long as the ignition is turned on. An automatic safety switch provides an automotive battery with protection against accidental discharge due to operator neglect. This material includes, but is not limited to, the design, layout, look, appearance and graphics. The third terminal, 24, connects to external loads. Gayler also teaches the use of alternator and various other connections that are regarded as redundant or unnecessary by applicant. The timer, 28, is normally preset for a time delay in the range of 4 to 12 hours. Hence, the timer provides brief time periods during which it is possible to determine if the internal power consumption of the battery safety switch itself is draining the battery beyond a safe charge level. Note that these voltages are approximate estimates based on an unloaded battery (not when charging). The last connection of the battery safety switch is the ignition switch connection, 50. Will get back to you ASAP. The cigarette lighter is often used to power accessories, such as portable computers and cellular equipment that continuously monitor incoming communications. We hope the following statement outlines clearly how we collect, use and protect the personal information which you provide to us. That being said while the multi-safer is a better option for modern start/stop equipped vehicles, it's still not the best. No. 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. ** Same/Next day not available in all locations or on all products and may be limited to stock availability. The reset signal is generated by the ignition switch, and is unconditional, i.e. A vehicle operator would have difficulty in finding the ignition lock without the interior light at night. Lead Acid start batteries typically found it vehicles should not be routinely deep cycled or that will reduce the life of the battery. The choice of power cable is made based on where the circuits to be protected are connected inside the fuse box itself. A relay is disengaged subsequently to detecting a battery voltage that is of lower magnitude than the reference. All orders placed over the weekend will be processed on Tuesday, Aug 2. In this state, vehicles equipped with this device function identically to those vehicle that ar not equipped with this device. The threshold sets the level of charge at which the battery is disconnected from one or more loads. This voltage is normally in the 11 V range. transistors, as opposed to relays. The first terminal, 14, connects to the positive battery pole, and the second terminal, 16, to the ground or negative battery pole. No. This fuse provides a suitable location for the ignition switch connection, 50. Normally an incoming power cord, 46, leading to the fuse box, 44, is cut just before entering the fuse box, 44, itself. The battery recovery is recognized by a slowly increasing battery voltage. For instance, it may be more desirable to keep hazard lights on rather than saving the battery. A timer, 28, is reset and started every time the ignition of a vehicle equipped with the battery safety switch, 1, is turned off. Small electrical loads disturb the chemical equilibrium of a battery by only a small amount--hence, only a minimal recovery is to be expected. The ignition switch is used as a reset means, and a safety precaution. The relay, 20, completes a circuit between the first terminal, 14, and a third terminal, 24. This process is described by using three separate states. * Freight delivery times stated are for average volume items with total order weight under 5kg for metro areas in eastern states. The first capacitor, 13, forms a filter network with the second voltage divider, thereby reducing noise and other signal contaminants. Protects your battery against excessive discharge when using 12V accessories ensuring the battery retains enough power for the next start. It should be noted that the battery is protected from being depleted of charge to such an extent that permanent damage occurs. The current limit is normally chosen low enough to engage the current limiting circuit, 25, during a substantial portion of the time the relay, 20, is engaged. The fact that the voltage reference, 2, provides a voltage substantially lower than the battery voltage is advantageous during abnormal operating conditions. Von Brimer, U.S. Pat. The first voltage divider determines a first threshold at which the comparator, 4, changes its output from a high voltage state to a low voltage state. No. It shall be your own responsibility to ensure that any products, services or information available through this website meet your specific requirements. It is subject to change without notice. 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. Morland, U.S. Pat. This re-energizes the same loads that were earlier turned off by the battery safety switch.

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