A reverse power supply device with built-in boost constant voltage and constant current charger for vehicles

Abstract

The utility model provides a reverse power supply device with a built-in vehicle-mounted boost constant voltage constant current charger, which is used in a power supply system in a car. The power supply system is connected to a main battery, which supplies power to the power supply system, including a DC / DC power module A connected in parallel with the main battery, the DC / DC power module A is connected in parallel with an auxiliary power supply system, the auxiliary power supply system contains an auxiliary battery 4, and the DC / DC power module A is provided with input and output terminals, the input and output terminals of the DC / DC power module A are connected in parallel with a self-locking normally open switch, the self-locking normally open switch is connected to the main battery through a parallel switch, and the parallel switch is connected in parallel to the input and output terminals of the DC / DC power module A. The utility model realizes a direct parallel interconnected power supply relationship between the auxiliary battery and the main battery, which is conducive to and convenient for the car owner to better start the generator under different environmental conditions, thereby better satisfying the normal use of the car owner, and better using the original car function for a longer time when the generator is turned off and parked.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle-mounted power supply systems, in particular to a vehicle-mounted boost type constant voltage and constant current charger built-in reverse power supply device. Background Art

[0002] At present, in order to solve the problem of electricity consumption during travel, car owners have installed a vehicle-mounted auxiliary battery power supply system in RV and bed cars. The system is composed of a large-capacity energy storage auxiliary battery, an inverter, a driving charger, a mains charger and a solar panel charger. The auxiliary battery is assembled with a safer lithium iron phosphate battery (called an auxiliary battery). There are many ways to charge the auxiliary battery: driving charging, mains AC charging and solar panel charging. Among these three charging methods, driving charging is the most popular charging method for car owners in the RV bed car travel life power supply system because of its fast charging and high efficiency. At present, driving charging devices have become standard in the power supply equipment of self-driving RV beds. The principle of the driving charging method is to use the original car's own generator to collect the surplus power supply energy of the original car generator during driving, and charge the auxiliary battery safely, continuously and stably through the "boost constant voltage and constant current charging module" and line connection. As long as the car can drive, there is electricity on the car.

[0003] The charging current of the constant voltage and constant current charging module related products on the market is unidirectional. The relationship between the car starting battery (called the main battery) and the car generator circuit in the car power supply circuit is a parallel circuit. The charging of the main battery is powered by the car generator. The driving charging power supply circuit of the auxiliary battery collects electricity from the main battery, which flows from the main battery to the auxiliary battery. The current flows in one direction, and then completes the charging of the auxiliary battery. This kind of car often cannot start the generator due to the following reasons: First, when the temperature is too low, the starting ability of the original car's starting battery (main battery) decreases; second, the owner uses it improperly, and long-term continuous power consumption causes the main battery to lose power; third, the main battery has been used for too long and the starting performance has decreased. It can be seen that these will cause the main battery to fail to start the generator, making the vehicle unable to be used normally, so improvements are urgently needed. Utility Model Content

[0004] 1. Technical issues that need to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a vehicle-mounted boost-type constant voltage and constant current charger with a built-in reverse power supply device, which realizes the parallel power supply of the auxiliary battery to the main battery, which is more convenient for the car owner to better start the generator, thereby better satisfying the normal use of the car owner, and better use of the original car functions for a longer time when the generator is turned off and parked.

[0006] 2. Technical solutions that need to be adopted

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A vehicle-mounted boost constant voltage constant current charger built-in reverse power supply device is used for a power supply system in a car, the power supply system is connected to a main battery, the main battery supplies power to the power supply system, and includes a DC / DC power supply module A connected in parallel with the main battery, the DC / DC power supply module A is connected in parallel with an auxiliary power supply system, the auxiliary power supply system contains a secondary battery, the DC / DC power supply module A is provided with input and output terminals, the input and output terminals of the DC / DC power supply module A are connected in parallel with a self-locking normally open switch, the self-locking normally open switch is connected to the main battery via a parallel switch, and the parallel switch is connected in parallel to the input and output terminals of the DC / DC power supply module A.

[0009] Preferably, the power supply system includes a generator B in the car and a linkage switch connected to the generator B, the generator B is connected in parallel with the main battery, and a driving charging switch and a fuse box in the car are connected between the parallel switch and the main battery.

[0010] Preferably, the self-locking normally open switch includes a normally open button switch connected to the positive electrode of the DC / DC power module A and the positive electrode of the auxiliary battery, the normally open button switch is connected to an electromagnetic relay, and the electromagnetic relay is connected to the parallel switch.

[0011] Preferably, the electromagnetic relay is connected in parallel with an LED indicator light.

[0012] Preferably, the auxiliary battery is a 12V lithium iron phosphate battery, and the voltage range of the auxiliary battery is consistent with that of the main battery.

[0013] 3. Technical effects to be achieved

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model is used for a power supply system in an automobile. The power supply system is connected with a main battery, which supplies power to the power supply system and includes a DC / DC power module A connected in parallel with the main battery. The DC / DC power module A is connected in parallel with an auxiliary power supply system, which contains a secondary battery. The DC / DC power module A is provided with input and output terminals, and the input and output terminals of the DC / DC power module A are connected in parallel with a self-locking normally open switch. The self-locking normally open switch is connected to the main battery through a parallel switch, and the parallel switch is connected in parallel to the input and output terminals of the DC / DC power module A, so that the secondary battery supplies power to the main battery in parallel, which is more conducive to and convenient for the car owner to better start the generator, thereby better satisfying the normal use of the car owner, and in the generator off parking state, the original car function can be better used for a longer time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the utility model.

[0017] In the figure: 2, main battery; 3, DC / DC power module A; 4, auxiliary battery; 5, self-locking normally open switch; 6, parallel switch; 11, generator B; 12, linkage switch; 13, driving charging switch; 14, fuse box; 51, normally open push button switch; 52, electromagnetic relay; 53, LED indicator light. DETAILED DESCRIPTION

[0018] In the description of the present utility model, it should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0019] In the description of the present utility model, it should be noted that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third" and the like are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0020] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail through the accompanying drawings and embodiments. However, it should be understood that the specific embodiment 1 described here is only used to explain the utility model and is not used to limit the scope of the utility model. In addition, in the following description, the description of the known structure and technology is omitted to avoid unnecessary confusion of the concept of the utility model.

[0022] Example 1: See Figure 1A vehicle-mounted boost constant voltage constant current charger built-in reverse power supply device, used for a power supply system in a car, the power supply system is connected to a main battery 2, the main battery 2 supplies power to the power supply system, including a DC / DC power supply module A3 connected in parallel with the main battery 2, the DC / DC power supply module A3 is connected in parallel with an auxiliary power supply system, the auxiliary power supply system contains a secondary battery 4, the DC / DC power supply module A3 is provided with input and output ends, the input and output ends of the DC / DC power supply module A3 are connected in parallel with a self-locking normally open switch 5, the self-locking normally open switch 5 is connected to the main battery 2 through a parallel switch 6, and the parallel switch 6 is connected in parallel to the input and output ends of the DC / DC power supply module A3. The utility model realizes that the auxiliary battery 4 (direction) and the main battery 3 are in a direct parallel power supply (electricity) relationship (parallel power supply), which is more conducive to and convenient for the car owner to better start the generator under different environmental conditions, thereby better satisfying the normal use of the car owner, and better use of the original car function for a longer time when the generator is turned off and parked.

[0023] The utility model charges the auxiliary battery 4 through the boost charging function of the main battery 2 and the DC / DC power module A3. When the power of the main battery 2 is insufficient, the parallel switch 6 is connected and conducted through the triggering connection operation of the self-locking normally open switch 5. In this way, the auxiliary battery 4 and the main battery 2 are in a direct parallel interconnection relationship, thereby finally realizing power supply, and finally realizing power supply for the power supply system of the entire vehicle. This utility model can realize the function of charging while driving.

[0024] Embodiment 2: It can be explained on the basis of embodiment 1, such as Figure 1 As shown, the power supply system includes a generator B11 in the car (a generator linked to the original car generator) and a linkage switch 12 connected to the generator B11. The generator 11B is connected in parallel with the main battery 2. The main battery 2 can supply power to the generator B11, and the linkage switch 12 can also be controlled, which is convenient for the owner to operate and use. The parallel switch 6 and the main battery 2 are connected with the driving charging switch 13 and the fuse box 14 in the car, which greatly improves the safety of circuit use. It is worth noting that the driving charging switch 13 uses a manual switch or a linkage switch triggered by the car ACC signal, as well as other remote controls, remote triggering switch devices, so that the auxiliary battery 4 is connected in parallel with the main battery 3 to provide sufficient power for starting the generator.

[0025] Embodiment 3: It can be described on the basis of Embodiment 1 or Embodiment 2, such as Figure 1As shown, the self-locking normally open switch 5 includes a normally open button switch 51 connected to the positive pole of the DC / DC power module A3 and the positive pole of the auxiliary battery 4. The normally open button switch 51 is connected to an electromagnetic relay 52, and the electromagnetic relay 52 is connected to a parallel switch 6. The normally open button switch 51 is normally open, and when needed, it only needs to be pressed to be in the on state. At this time, the coil in the electromagnetic relay 52 is energized and attracted, which will make the parallel switch 6 connected. At this time, the auxiliary battery 4 and the main battery 2 form a direct parallel power supply relationship. It is worth noting that the electromagnetic relay 52 is connected in parallel with an LED indicator 53, which is helpful for the car owner to see more intuitively whether the electromagnetic relay 52 is turned on.

[0026] When the power of the main battery 2 is insufficient, the parallel switch 6 is connected and conducted through the triggering connection operation of the self-locking normally open switch 5. Specifically, the normally open button switch 51 is normally open, and when needed, it is in the on state by just pressing. At this time, the coil in the electromagnetic relay 52 is energized and attracted, which makes the parallel switch 6 connected. In this way, the auxiliary battery 4 and the main battery 2 are in a direct parallel interconnection relationship, thereby finally realizing power supply, and finally realizing power supply for the power supply system of the entire vehicle.

[0027] Embodiment 4: It can be described on the basis of Embodiment 1, Embodiment 2 or Embodiment 3, such as Figure 1 As shown, the auxiliary battery 4 is a 12V lithium iron phosphate battery (original vehicle voltage or other voltages of 24V or 48V, etc.), the auxiliary battery 4 is consistent with the voltage range of the main battery 2, and the charging voltage range is a matching charging voltage range.

[0028] At present, after the automobile generator is started, the direction of the charging current remains unchanged during the entire charging process, and when the automobile generator B11 stops, the rated voltage of the charged auxiliary battery 4 is 13.2 volts, which is higher than the voltage of the main battery 2 (12 volts), and there will be no current backflow. The boost-type constant voltage and constant current charger has unidirectional isolation performance, has outstanding substance and practicality, and is more conducive to meeting usage needs. Since the auxiliary battery 4 is a (12V) lithium iron phosphate battery, this source is wide and easy to implement.

[0029] like Figure 1As shown, in normal use, the main battery 2 generally supplies power to the power supply system, and when the main battery 2 is low on power, it only needs to be pressed (and other remote controls, remote trigger switch devices) to be in the on state. At this time, the coil in the electromagnetic relay 52 is energized and attracted, which will make the parallel switch 6 connected. At this time, the auxiliary battery 4 can supply power to the main battery 2. Due to the normally open button switch 51 connected to the positive pole of the DC / DC power module A3 and the positive pole of the auxiliary battery 4, the auxiliary battery 4 can supply power to the main battery 2 through the parallel switch 6, thereby realizing power supply for the power supply system of the entire vehicle. In the utility model, the owner can charge the main battery 2 with the auxiliary battery 4 through simple operations in the car, and start the engine (generator B11) at the same time. The device of the present invention can use the auxiliary battery 4 to start the car (generator B11), and the auxiliary battery 4 with a larger capacity can also be used to supply power to the entire car power supply system, so as to achieve better use of the original car function for a longer time when the engine (generator B11) is turned off. The generator B11 in the utility model is an engine linked to the original vehicle engine.

[0030] The standard parts used in this application document can all be purchased from the market, and the specific connection methods of each part adopt conventional means such as mature standard parts bolts and rivets in the prior art. The internal components of the switch and processor all adopt conventional models in the prior art, and their internal structures belong to the prior art structure. Workers can complete normal operation of them according to the existing technical manual. In addition, the circuit connection adopts the conventional connection method in the prior art, and no specific description is given here.

[0031] It should be noted that although the above embodiments have been described in this article, this does not limit the scope of patent protection of the utility model. Therefore, based on the innovative concept of the utility model, changes and modifications to the embodiments described in this article, or equivalent structural or equivalent process changes made using the contents of the utility model specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields are all included in the scope of protection of the utility model patent.

Claims

1. A vehicle-mounted boost type constant voltage constant current charger built-in reverse power supply device, used for a power supply system in a vehicle, the power supply system being connected to a main battery (2), the main battery (2) supplying power to the power supply system, comprising a DC / DC power supply module A (3) connected in parallel with the main battery (2), the DC / DC power supply module A (3) being connected in parallel to an auxiliary power supply system, the auxiliary power supply system comprising a secondary battery (4), the DC / DC power supply module A (3) being provided with input and output terminals, the input and output terminals of the DC / DC power supply module A (3) being connected in parallel to a self-locking normally open switch (5), the self-locking normally open switch (5) being connected to the main battery (2) via a parallel switch (6), the parallel switch (6) being connected in parallel to the input and output terminals of the DC / DC power supply module A (3).

2. The vehicle-mounted boost constant voltage constant current charger built-in reverse power supply device as claimed in claim 1, characterized in that: The power supply system comprises a generator B (11) in a car and a linkage switch (12) connected to the generator B (11); the generator B (11) is connected in parallel with the main battery (2); and a driving charging switch (13) and a fuse box (14) in the car are connected between the parallel switch (6) and the main battery (2).

3. The vehicle-mounted boost constant voltage constant current charger built-in reverse power supply device as claimed in claim 1 or 2, characterized in that: The self-locking normally open switch (5) comprises a normally open push button switch (51) connected to the positive electrode of the DC / DC power module A (3) and the positive electrode of the auxiliary battery (4), the normally open push button switch (51) being connected to an electromagnetic relay (52), and the electromagnetic relay (52) being connected to the parallel switch (6).

4. The vehicle-mounted boost constant voltage constant current charger built-in reverse power supply device as claimed in claim 3, characterized in that: The electromagnetic relay (52) is connected in parallel with an LED indicator light (53).

5. The vehicle-mounted boost constant voltage constant current charger built-in reverse power supply device as claimed in claim 1, 2 or 4, characterized in that: The auxiliary battery (4) is a 12V lithium iron phosphate battery, and the voltage range of the auxiliary battery (4) is consistent with that of the main battery (2).

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