A 12v-14v battery-powered device

Abstract

This utility model relates to the field of battery power supply, specifically a 12V-14V battery power supply device, including two 12V batteries, one a discharging battery and the other a fully charged backup battery, used to provide DC voltage; two voltmeters V1 and V2 capable of acquiring voltages from 0 to 50V; one ammeter A capable of acquiring currents from 0 to 50A; three relays, namely a normally open relay K, a time-delay relay KT, and an undervoltage relay KM; a diode D capable of withstanding a 30A forward current; both batteries are reliably grounded; and a 12V controller and load under test, used to verify whether the system voltage meets the requirements during long-term operation. This utility model uses voltmeters to monitor voltage and ammeters to monitor current; the relays respectively control the on / off state of the circuit, delay disconnection, and undervoltage triggering; the diode is used to prevent false triggering of specific circuits. Through the coordinated work of all components, stable power supply switching and voltage maintenance are achieved.

Description

Technical Field

[0001] This utility model relates to the field of battery power supply technology, specifically a 12V-14V battery power supply device. Background Technology

[0002] In EMC testing of automotive components, controllers often need to undergo long-term operational tests to verify their performance stability under continuous operation. During these tests, the stability of the supply voltage is crucial, requiring it to be maintained between 12V and 14V.

[0003] Currently, a single battery is typically used to power the testing system. However, during long-term testing, the battery gradually discharges, causing the voltage to drop and making it difficult to maintain within the 12V to 14V range. This affects the accuracy and reliability of the test results. If the test is interrupted midway and the battery is replaced, it will not only affect the continuity of the test but may also lead to inaccurate test data if the test personnel do not notice the insufficient voltage in time.

[0004] In summary, to address the aforementioned problems, we propose a 12V-14V battery power supply device. Utility Model Content

[0005] This invention aims to solve the problem of unstable voltage and reduced test accuracy when using a single battery for long-term testing in the prior art. It provides a 12V-14V battery power supply device that can provide uninterrupted power supply, ensuring the power supply voltage is between 12V and 14V, and avoiding energy loss.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A 12V-14V battery-powered device, comprising:

[0008] Two 12V batteries, one a discharge battery and the other a fully charged backup battery, are used to provide DC voltage;

[0009] Two voltmeters, V1 and V2, capable of acquiring voltages from 0 to 50V;

[0010] An ammeter A capable of collecting currents from 0 to 50A;

[0011] The three relays are normally open relay K, energized delay relay KT, and undervoltage relay KM.

[0012] A diode D that can withstand a forward current of 30A;

[0013] Both batteries are reliably grounded;

[0014] And a 12V controller and load under test, used to verify whether the system voltage meets the requirements during long-term operation.

[0015] Preferably, the positive terminal of the discharge battery is connected in sequence to the positive terminal of the 12V controller and the load via the switch of the power-on delay relay KT and the ammeter A, and the negative terminal of the discharge battery is directly connected to the ground and the negative terminal of the 12V controller and the load, forming a power supply circuit from the discharge battery to the 12V controller and the load.

[0016] Preferably, the backup battery is connected in sequence to the positive terminal of the 12V controller and the load via the switch of the normally open relay K, the diode D, and the ammeter A. The negative terminal of the backup battery is directly connected to ground and the negative terminal of the 12V controller and the load, forming a power supply circuit from the backup battery to the 12V controller and the load.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This invention employs two batteries to provide DC voltage; a voltmeter to monitor voltage and an ammeter to monitor current; relays to control circuit opening and closing, delay disconnection, and undervoltage triggering; and diodes to prevent false triggering of specific circuits. Through the coordinated operation of these components, stable power supply switching and voltage maintenance are achieved.

[0019] This invention ensures that the power supply voltage to the 12V controller and load remains between 12V and 14V during long-term testing, thus ensuring the accuracy of the test and the reliability of the results.

[0020] This invention enables uninterrupted power supply from the discharging battery to the backup battery, avoiding interruptions in testing due to battery replacement.

[0021] This invention, through the cooperation of various relays and diodes, prevents energy loss caused by the backup battery charging the discharging battery, thereby improving the energy utilization rate of the battery.

[0022] This invention avoids the problem of the undervoltage relay closing again for a long time due to voltage recovery after the battery stops supplying power, thus ensuring the stability of the system. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1 A 12V-14V battery-powered device, comprising:

[0026] Two 12V batteries, one a discharge battery and the other a fully charged backup battery, are used to provide DC voltage;

[0027] Two voltmeters, V1 and V2, capable of collecting voltages from 0 to 50V, are used to monitor the voltages of the discharge battery and the backup battery, respectively.

[0028] An ammeter A, capable of collecting current from 0 to 50A, is used to monitor the current in the power supply circuit;

[0029] The three relays are normally open relay K, power-on delay relay KT (delay 1s), and undervoltage relay KM (triggered when voltage <12V).

[0030] A diode D that can withstand a forward current of 30A;

[0031] Both batteries are reliably grounded;

[0032] And a 12V controller and load under test, used to verify whether the system voltage meets the requirements during long-term operation.

[0033] The positive terminal of the discharge battery is connected in sequence to the positive terminal of the 12V controller and the load through the switch of the power-on delay relay KT and the ammeter A. The negative terminal of the discharge battery is directly connected to the ground and the negative terminal of the 12V controller and the load, forming a power supply circuit from the discharge battery to the 12V controller and the load.

[0034] The backup battery is connected in sequence to the positive terminal of the 12V controller and the load via the switch of the normally open relay K, the diode D, and the ammeter A. The negative terminal of the backup battery is directly connected to ground and the negative terminal of the 12V controller and the load, forming a power supply circuit from the backup battery to the 12V controller and the load.

[0035] The undervoltage relay coil KM is associated with the discharging battery and is used to monitor the voltage of the discharging battery.

[0036] The coil of the undervoltage relay KM is driven when the voltage of the discharging battery is less than 12V, causing the switch of the undervoltage relay KM to close. The backup battery supplies power to the coils of the normally open relay K and the energized time delay relay KT. The closing of the normally open relay K achieves self-locking, and the switch of the energized time delay relay KT opens after a 1-second delay, cutting off the positive terminal path of the discharging battery and keeping the positive terminal path of the backup battery connected. This achieves uninterrupted power supply to the 12V controller and load, and prevents the coil of the undervoltage relay KM from closing again for a long time due to voltage rise after the discharging battery stops supplying power for testing.

[0037] The diode D can prevent the coil of the normally open relay K and the coil of the energized delay relay KT from being driven when the battery is discharging.

[0038] The working process of this device is as follows:

[0039] During normal operation, the 12V controller and load are powered by the discharge battery. At this time, the presence of diode D ensures that the normally open relay coil K and the energized delay relay coil KT will not be driven when powered by the discharge battery.

[0040] When the voltage of the discharged battery is less than 12V, the undervoltage relay coil KM is driven and the KM switch is closed. At this time, the backup battery supplies power to the normally open relay coil K and the energized time delay relay coil KT. The normally open relay switch K closes immediately and achieves self-locking, ensuring the stable connection of the backup battery power supply circuit. At the same time, the energized time delay relay switch KT opens after a delay of 1 second, cutting off the positive terminal path of the discharged battery.

[0041] Through the above process, uninterrupted power supply from the discharging battery to the backup battery is achieved. Furthermore, the disconnection of the KT switch prevents energy loss caused by the backup battery charging the discharging battery. At the same time, the self-locking of the K switch avoids the problem of the KM switch disconnecting due to voltage rebound after the discharging battery stops supplying power, thus cutting off the power supply path to the backup battery. This ensures that the power supply voltage is always maintained between 12V and 14V, ensuring the smooth progress of the test.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A 12V-14V battery power supply device, characterized in that, include: Two 12V batteries, one a discharge battery and the other a fully charged backup battery, are used to provide DC voltage; Two voltmeters, V1 and V2, capable of acquiring voltages from 0 to 50V; An ammeter A capable of collecting currents from 0 to 50A; The three relays are normally open relay K, energized delay relay KT, and undervoltage relay KM. A diode D that can withstand a forward current of 30A; Both batteries are reliably grounded; And a 12V controller and load under test, used to verify whether the system voltage meets the requirements during long-term operation.

2. The 12V-14V battery power supply device according to claim 1, characterized in that, The positive terminal of the discharge battery is connected in sequence to the positive terminal of the 12V controller and the load through the switch of the power-on delay relay KT and the ammeter A. The negative terminal of the discharge battery is directly connected to the ground and the negative terminal of the 12V controller and the load, forming a power supply circuit from the discharge battery to the 12V controller and the load.

3. The 12V-14V battery power supply device according to claim 1, characterized in that, The backup battery is connected in sequence to the positive terminal of the 12V controller and the load via the switch of the normally open relay K, the diode D, and the ammeter A. The negative terminal of the backup battery is directly connected to ground and the negative terminal of the 12V controller and the load, forming a power supply circuit from the backup battery to the 12V controller and the load.

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