Motor home power supply system

Abstract

The utility model discloses a motor home power supply system which comprises a main storage battery, an auxiliary storage battery, a double-storage-battery isolator, a storage battery low-voltage protector, a 48V lithium battery pack, a direct-current transformer and a one-way isolator. Wherein the positive electrode of the auxiliary storage battery is connected with the direct-current generator and the positive electrode of the main storage battery, and the double-storage-battery isolator is connected in series between the positive electrode of the auxiliary storage battery and the positive electrode of the main storage battery; the storage battery low-voltage protector is connected in series between the first load and the positive electrode of the auxiliary storage battery, and the storage battery low-voltage protector is also connected in series between the first load and the double-storage-battery isolator; the 48V lithium battery pack is connected with the main side of the direct-current transformer; the positive electrode of the auxiliary storage battery and the second load are connected in parallel on the secondary side of the direct-current transformer; the one-way isolator is connected in series between the positive electrode of the auxiliary storage battery and the secondary side of the direct-current transformer, so that current unidirectionally flows from the secondary side of the direct-current transformer to the auxiliary storage battery.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, in particular to a power supply system for a recreational vehicle. Background Art

[0002] RVs, also known as motorhomes, can be parked on beaches, lakeshores, grasslands, hillsides, and forests far away from the city, while enjoying the lifestyle of the city. RVs are like smaller versions of houses, and can be roughly divided into two types: self-propelled and trailer-type. Self-propelled RVs can be divided into self-propelled A-type, B-type, and C-type, and trailer-type RVs can be divided into trailer-type A-type, B-type, C-type, D-type, and mobile villas. RVs generally have bedrooms, bathrooms with toilets, washstands, and bathtubs, living rooms, and open kitchens.

[0003] RV, also known as home on wheels, has both functions of house and car, but its attribute is still a car. It is a movable type of vehicle with basic facilities necessary for home. RV is a fashionable vehicle introduced from abroad, which can be divided into living area, bedroom area, sanitary area, kitchen area, etc. RV integrates clothing, food, housing and transportation, realizing travel in life and life while traveling. With the rapid development of China's economy, the popularity of RVs in China will become higher and higher.

[0004] The power supply system of an RV generally includes a main battery and a slave battery. The main battery is generally charged by an on-board DC generator, but the slave battery is mostly charged by an external charger. There are problems such as untimely recharging of the slave battery and difficulty in charging. Utility Model Content

[0005] In view of the defects in the prior art, the utility model provides a motorhome power supply system to solve the technical problems raised in the background technology.

[0006] A motorhome power supply system includes a main battery and a secondary battery, wherein the positive electrode of the main battery is connected to a vehicle-mounted DC generator, and further includes a dual battery isolator, a battery low-voltage protector, a 48V lithium battery pack, a DC transformer, and a unidirectional isolator; wherein:

[0007] The positive electrode of the auxiliary battery is connected to the positive electrode of the DC generator and the positive electrode of the main battery, and the dual battery isolator is connected in series between the positive electrode of the auxiliary battery and the positive electrode of the main battery;

[0008] The battery low voltage protector is connected in series between the first load and the positive electrode of the auxiliary battery, and the battery low voltage protector is also connected in series between the first load and the dual battery isolator;

[0009] The 48V lithium battery pack is connected to the primary side of the DC transformer, and the positive electrode of the secondary battery and the second load are connected in parallel to the secondary side of the DC transformer;

[0010] The unidirectional isolator is connected in series between the positive electrode of the auxiliary battery and the secondary side of the DC transformer, so that the current flows unidirectionally from the secondary side of the DC transformer to the auxiliary battery.

[0011] Furthermore, the unidirectional isolator is a diode.

[0012] Furthermore, the DC transformer is a DC48-DC12 transformer.

[0013] Furthermore, a first fuse is connected in series between the dual battery isolator and the positive electrode of the main battery.

[0014] Furthermore, the model of the first fuse is S150A.

[0015] Furthermore, a second fuse is connected in series between the battery low voltage protector and the first load.

[0016] Furthermore, the model of the second fuse is S100A.

[0017] Furthermore, the dual-battery isolator is also connected to an emergency power-borrowing switch.

[0018] The beneficial effects of the utility model are embodied in:

[0019] The utility model provides a motorhome power supply system. When the motorhome engine is in a starting state, the on-board DC generator charges the main battery first. When the voltage of the main battery exceeds 13.8V, the dual battery isolator automatically connects to the auxiliary battery to charge the 12V auxiliary battery.

[0020] When the switch of the 48V lithium battery pack is turned on, the DC48-DC12 transformer actually outputs a 14V voltage to charge the 12V auxiliary battery through the unidirectional isolator and supply power to the first load.

[0021] The unidirectional isolator has the function of unidirectional current isolation. When the switch of the 48V lithium battery pack is turned off, the auxiliary battery current will not flow back to supply power to the second load.

[0022] The battery low-voltage protector is used to protect the auxiliary battery. When the vehicle is not used for a long time and there is no charging source, the auxiliary battery voltage will drop to 12.5V and the auxiliary battery output load will be automatically cut off to prevent the auxiliary battery from excessive power loss and extend the life of the auxiliary battery.

[0023] Therefore, the RV power supply system provided by the utility model can charge the auxiliary battery when the vehicle is driving or parked; and when the main battery is low on power, the emergency power switch is turned on, and the auxiliary battery can reversely charge the main battery to start the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0025] The accompanying drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application. For ordinary technicians in this field, other accompanying drawings can also be obtained based on these accompanying drawings without paying creative labor.

[0026] Figure 1 A circuit schematic diagram of a motorhome power supply system provided in an embodiment of the utility model.

[0027] The realization of the purpose, functional features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. The above-mentioned drawings have shown clear embodiments of this application, which will be described in more detail later. These drawings and textual descriptions are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0028] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0029] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0030] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0031] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0032] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] like Figure 1 As shown, the utility model provides a motorhome power supply system, including a main battery E1 and a sub-battery E2, and the main battery E1 and the sub-battery E2 are both 12V batteries. The positive electrode of the main battery E1 is connected to the vehicle-mounted DC generator G, and also includes a dual battery isolator Q1, a battery low voltage protector Q2, a 48V lithium battery pack E3, a DC transformer Q3 and a unidirectional isolator D. Among them, the positive electrode of the sub-battery E2 is connected to the DC generator G and the positive electrode of the main battery E1, and the dual battery isolator Q1 is connected in series between the positive electrode of the sub-battery E2 and the positive electrode of the main battery E1.

[0035] When the engine of the RV is in the starting state, the on-board DC generator G gives priority to charging the main battery E1; when the voltage of the main battery E1 exceeds 13.8V, the dual battery isolator Q1 automatically connects to the slave battery E2 to charge the slave battery E2.

[0036] The battery low voltage protector Q2 is connected in series between the first load L1 and the positive electrode of the auxiliary battery E2, and the battery low voltage protector Q2 is also connected in series between the first load L1 and the dual battery isolator Q1. When the voltage of the auxiliary battery E2 drops to the set voltage, the battery low voltage protector Q2 is automatically disconnected to protect the auxiliary battery E2, prevent the auxiliary battery E2 from running out of power, and extend the life of the auxiliary battery E2.

[0037] The 48V lithium battery pack E3 is connected to the primary side of the DC transformer Q3, the positive electrode of the auxiliary battery E2 and the second load L2 are connected in parallel to the secondary side of the DC transformer Q3, and the second load L2 is powered by the 48V lithium battery pack E3. The unidirectional isolator D is connected in series between the positive electrode of the auxiliary battery E2 and the secondary side of the DC transformer Q3, so that the current flows unidirectionally from the secondary side of the DC transformer Q3 to the auxiliary battery E2.

[0038] In this embodiment, the unidirectional isolator D is a diode. The DC transformer Q3 is a DC48-DC12 transformer. When the switch of the 48V lithium battery pack E3 is turned on, the DC48-DC12 transformer actually outputs a 14V voltage to charge the auxiliary battery E2 through the unidirectional isolator and supply power to the first load L1. The unidirectional isolator D plays a role in unidirectional current isolation. When the switch of the 48V lithium battery pack E3 is turned off, the current of the auxiliary battery E2 will not flow back to supply power to the second load L2.

[0039] Furthermore, a first fuse is connected in series between the dual battery isolator Q1 and the positive electrode of the main battery E1. The model of the first fuse is S150A. A second fuse is connected in series between the battery low voltage protector Q2 and the first load L1. The model of the second fuse is S100A.

[0040] Furthermore, the dual battery isolator Q1 is also connected to an emergency power switch K. When the main battery E1 is low on power, the emergency power switch K is turned on, and the auxiliary battery E2 can reversely charge the main battery E1 to start the engine.

[0041] In summary, the RV power supply system provided by the utility model can charge the auxiliary battery when the vehicle is driving or parked.

[0042] Finally, it should be noted that the various technical features of the technical solution of the present application can be combined arbitrarily. In order to make the description concise, not all possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of the present application.

[0043] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments may still be modified, or some or all of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and should all be included in the scope of the claims and specification of the present invention.

Claims

1. A motorhome power supply system, comprising a main battery and a secondary battery, wherein the positive electrode of the main battery is connected to a DC generator on board, characterized in that: It also includes dual battery isolators, battery low voltage protectors, 48V lithium battery packs, DC transformers and unidirectional isolators; among them, The positive electrode of the auxiliary battery is connected to the positive electrode of the DC generator and the positive electrode of the main battery, and the dual battery isolator is connected in series between the positive electrode of the auxiliary battery and the positive electrode of the main battery; The battery low voltage protector is connected in series between the first load and the positive electrode of the auxiliary battery, and the battery low voltage protector is also connected in series between the first load and the dual battery isolator; The 48V lithium battery pack is connected to the primary side of the DC transformer, and the positive electrode of the secondary battery and the second load are connected in parallel to the secondary side of the DC transformer; The unidirectional isolator is connected in series between the positive electrode of the auxiliary battery and the secondary side of the DC transformer, so that the current flows unidirectionally from the secondary side of the DC transformer to the auxiliary battery.

2. A motorhome power supply system according to claim 1, characterized in that: The unidirectional isolator is a diode.

3. The RV power supply system according to claim 1, characterized in that: The DC transformer is a DC48-DC12 transformer.

4. The RV power supply system according to claim 1, characterized in that: A first fuse is connected in series between the dual battery isolator and the positive electrode of the main battery.

5. A motorhome power supply system according to claim 4, characterized in that: The model of the first fuse is S150A.

6. The RV power supply system according to claim 1, characterized in that: A second fuse is connected in series between the battery low voltage protector and the first load.

7. A motorhome power supply system according to claim 6, characterized in that: The model of the second fuse is S100A.

8. The RV power supply system according to claim 1, characterized in that: The dual battery isolator is also connected with an emergency power-borrowing switch.

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