New energy automobile and in-automobile discharging system thereof

Abstract

The utility model discloses a new energy vehicle and in-vehicle discharge system thereof, the system comprises a bidirectional vehicle-mounted charger and a power battery, the input end of the bidirectional vehicle-mounted charger is connected with the output end of the power battery, the bidirectional vehicle-mounted charger is internally provided with a first discharge loop and a second discharge loop, and the second discharge loop is connected with the output end of the power battery. The output end of the first discharging loop is connected with a first charging port, and the output end of the second discharging loop is connected with a second charging port; the first discharge loop and / or the second discharge loop are / is internally provided with a switch and a pre-charging loop connected to the two ends of the switch in parallel. The pre-charging loop is additionally arranged in the discharging loop of the system, so that the voltage difference between the two ends of a switch contact in the discharging loop is controlled within a reasonable range, and uninterruptible power switching from single-loop discharging to double-discharging loop is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy automobile field especially, and it relates to a new energy automobile and its in -vehicle discharge system. BACKGROUND

[0002] In prior art, the in-vehicle discharge system of new energy automobile is generally through bidirectional vehicle-mounted charger to convert high voltage direct current of power battery into alternating current, the method is to parallel another discharge circuit to the vehicle on the original discharge circuit, both discharge circuits are controlled to open and close through relay, when one way discharge has opened, the discharge circuit has already had 220V high voltage alternating current, if another discharge circuit needs to open discharge at this time, the inverter function of bidirectional vehicle-mounted charger needs to be stopped, thereby avoiding the relay in the discharge circuit to be attracted with high voltage, when being attracted with high voltage, two contacts have 220V voltage difference, arc will be generated, and large impact current will be generated, seriously influence the service life of relay. SUMMARY

[0003] The utility model embodiment provides a new energy automobile and its in-vehicle discharge system to solve the problem of short power failure caused by switching discharge circuit of existing in-vehicle discharge system, reduce user power experience.

[0004] In an embodiment, an in-vehicle discharge system of new energy automobile is provided, the in-vehicle discharge system comprises:

[0005] Bidirectional vehicle-mounted charger and power battery, the input end of bidirectional vehicle-mounted charger is connected to the output end of power battery, first discharge circuit and second discharge circuit are arranged in bidirectional vehicle-mounted charger, the output end of first discharge circuit is connected to first charging port, the output end of second discharge circuit is connected to second charging port, and switch and pre-charge circuit parallelly connected to both ends of the switch are arranged in first discharge circuit and / or second discharge circuit.

[0006] In an embodiment, first switch is arranged in first discharge circuit, and first pre-charge circuit is parallelly connected to both ends of first switch.

[0007] In an embodiment, second switch is arranged in second discharge circuit, and second pre-charge circuit is parallelly connected to both ends of second switch.

[0008] In an embodiment, the first pre-charge circuit includes a third switch and a first pre-charge resistor, which are connected in series.

[0009] In an embodiment, the second pre-charge circuit includes a fourth switch and a second pre-charge resistor, which are connected in series.

[0010] In an embodiment, the control end of the bidirectional on-board charger is connected to the vehicle controller, for obtaining the discharge instruction sent by the vehicle controller.

[0011] In an embodiment, the first charging port is an alternating current charging port, and the second charging port is an in-vehicle discharge socket.

[0012] In an embodiment, the output end of the first pre-charge circuit is connected to the first charging port, and the input end of the first pre-charge circuit is connected to the power supply output end of the bidirectional on-board charger.

[0013] In an embodiment, the output end of the second pre-charge circuit is connected to the second charging port, and the input end of the second pre-charge circuit is connected in parallel to the input end of the first pre-charge circuit.

[0014] In an embodiment, a new energy vehicle is provided, which includes a vehicle body and an in-vehicle discharge system arranged in the vehicle body.

[0015] The new energy vehicle and the in-vehicle discharge system thereof increase the pre-charge circuit in the discharge circuit of the system, thereby controlling the voltage difference between the two ends of the switch contact in the discharge circuit within a reasonable range, realizing the uninterrupted switching of single-circuit discharge to double-discharge circuit, solving the pain point of in-vehicle discharge mode switching of high-end vehicles, realizing the switching of one-way discharge to two-way discharge without stopping the inverter power supply, ensuring the service life of the relay while improving the user experience, and achieving low cost and large-scale application on the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0017] Figure 1 is the in-vehicle discharge system circuit schematic diagram of the new energy vehicle in an embodiment of the present application.

[0018] The symbols are explained as follows:

[0019] 10 bidirectional vehicle charger; 20 power battery; 30 first pre-charge circuit; 40 second pre-charge circuit; 50 vehicle controller; 60 first charging port; 70 second charging port. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] It should be understood that the present application can be implemented in different forms and should not be interpreted as being limited to the embodiments presented herein. On the contrary, these embodiments are provided to make the disclosure complete and full and to fully convey the scope of the present application to those skilled in the art. In the drawings, the sizes and relative sizes of layers and regions may be exaggerated for clarity throughout the drawings the same reference numbers represent the same elements.

[0022] It should be understood that when an element or layer is referred to as being "on", "adjacent", "connected to", or "coupled to" another element or layer, it can be directly on, adjacent, connected or coupled to the other element or layer, or intervening elements or layers can be present. In contrast, when an element is referred to as being "directly on", "directly adjacent", "directly connected to", or "directly coupled to" another element or layer, then there are no intervening elements or layers present. It will be understood that, although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present application.

[0023] Spatial relation terms such as “below,” “under,” “below,” “under,” “above,” “above,” etc., are used herein for convenience of description to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms are intended to also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, then the element or feature described as “below,” “under,” or “below” other elements or features will be oriented “above” other elements or features. Therefore, the exemplary terms “below” and “under” can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or otherwise) and the spatial descriptive terms used herein will be interpreted accordingly.

[0024] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. When used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising” and / or “including,” when used in this specification, identify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups. When used herein, the term “and / or” includes any and all combinations of the associated listed items.

[0025] To fully understand this utility model, detailed structures and steps will be presented in the following description to illustrate the technical solution proposed by this utility model. Preferred embodiments of this utility model are described in detail below; however, in addition to these detailed descriptions, this utility model may have other embodiments.

[0026] In one embodiment, such as Figure 1 As shown, an in-vehicle discharge system for a new energy vehicle is provided, the in-vehicle discharge system comprising:

[0027] The bidirectional on-board charger 10 and the power battery 20 are provided. The input end of the bidirectional on-board charger 10 is connected to the output end of the power battery 20. The bidirectional on-board charger 10 is provided with a first discharge circuit and a second discharge circuit. The output end of the first discharge circuit is connected to a first charging port 60, and the output end of the second discharge circuit is connected to a second charging port 70. The first discharge circuit and the second discharge circuit are respectively provided with a switch and a pre-charge circuit connected in parallel across the two ends of the switch.

[0028] The AC L level and the AC N level of the first charging port 60 are connected to the AC L level and the AC N level of the bidirectional vehicle charger 10 through a high-voltage wire harness, and the AC L level and the AC N level of the second charging port 70 are connected in parallel to the L level and the N level of the first AC charging port and the high-voltage wire harness connected to the bidirectional vehicle charger 10; the input end of the vehicle charger includes a DC positive pole DC+ and a DC negative pole DC-, which are respectively connected to the output end of the power battery 20, i.e., the DC positive pole DC+ and the DC negative pole DC- through a high-voltage wire harness. Figure 1 The PE line (i.e., the protective grounding line) of the first charging port 60 and the second charging port 70 is connected to the vehicle body together with the shell of the bidirectional vehicle charger 10 to achieve safe grounding.

[0029] The working principle of the above-mentioned in-vehicle discharging system is as follows:

[0030] When only the first discharging circuit of the bidirectional vehicle charger 10 needs to work, the first discharging circuit is controlled to be turned on, i.e., the power battery 20 is discharged to the user equipment connected to the first charging port 60 through the first discharging circuit of the bidirectional vehicle charger 10. During the working process of the first discharging circuit, when the second discharging circuit of the bidirectional vehicle charger 10 needs to work, the pre-charging circuit in the second discharging circuit is first controlled to be turned on, and then the switch connected in parallel to the pre-charging circuit is controlled to be turned on, i.e., the power battery 20 is discharged to the user equipment connected to the second charging port 70 through the second discharging circuit of the bidirectional vehicle charger 10.

[0031] When only the second discharging circuit of the bidirectional vehicle charger 10 needs to work, the second discharging circuit is controlled to be turned on, i.e., the power battery 20 is discharged to the user equipment connected to the second charging port 70 through the second discharging circuit of the bidirectional vehicle charger 10. During the working process of the second discharging circuit, when the first discharging circuit of the bidirectional vehicle charger 10 needs to work, the pre-charging circuit in the first discharging circuit is first controlled to be turned on, and then the switch connected in parallel to the pre-charging circuit is controlled to be turned on, i.e., the power battery 20 is discharged to the user equipment connected to the first charging port 60 through the first discharging circuit of the bidirectional vehicle charger 10.

[0032] In other embodiments, when only the second discharging circuit of the bidirectional vehicle charger 10 needs to be controlled to work during the working process of the first discharging circuit, a pre-charging circuit connected in parallel to the switch in the second discharging circuit can be arranged, and a pre-charging circuit in the first discharging circuit does not need to be arranged; similarly, when only the first discharging circuit of the bidirectional vehicle charger 10 needs to be controlled to work during the working process of the second discharging circuit, a pre-charging circuit connected in parallel to the switch in the first discharging circuit can be arranged, and a pre-charging circuit in the second discharging circuit does not need to be arranged.

[0033] The in-vehicle discharge system of the embodiment adds a pre-charge circuit in the discharge circuit, when the pre-charge circuit is turned on, the voltage difference between the two ends of the switch (K1 or K3) is the voltage difference between the two ends of the resistor in the pre-charge circuit, and since the voltage difference between the two ends of the resistor in the pre-charge circuit is small, the voltage difference between the two ends of the switch (K1 or K3) in the discharge circuit can be controlled within a reasonable range, realizing the uninterrupted switching of single-circuit discharge to double-discharge circuit, solving the pain point of in-vehicle discharge mode switching of high-end vehicles, realizing the switching of one-way discharge to two-way discharge without stopping the inverter power supply, ensuring the service life of the relay while improving the user experience, and at the same time, the cost is low, and it can be widely applied in vehicles.

[0034] In an embodiment, as shown in Figure 1 The first switch K1 is connected in series in the first discharge circuit, and the first pre-charge circuit 30 is connected in parallel across the two ends of the first switch K1.

[0035] In the working process of the second discharge circuit, when the first discharge circuit of the bidirectional on-board charger 10 needs to work, the first pre-charge circuit in the first discharge circuit is first controlled to be turned on, and then the first switch K1 is controlled to be turned on, so that the power battery 20 discharges to the user equipment connected to the first charging port 60 through the first discharge circuit of the bidirectional on-board charger 10.

[0036] In an embodiment, as shown in Figure 1 The second switch K3 is connected in series in the second discharge circuit, and the second pre-charge circuit 40 is connected in parallel across the two ends of the second switch K3.

[0037] In the working process of the first discharge circuit, when the second discharge circuit of the bidirectional on-board charger 10 needs to work, the second pre-charge circuit in the second discharge circuit is first controlled to be turned on, and then the second switch K3 is controlled to be turned on, so that the power battery 20 discharges to the user equipment connected to the second charging port 70 through the second discharge circuit of the bidirectional on-board charger 10.

[0038] In an embodiment, the first pre-charge circuit 30 includes a third switch K2 and a first pre-charge resistor, and the third switch K2 and the first pre-charge resistor are connected in series.

[0039] In the working process of the second discharge circuit, when the first discharge circuit of the bidirectional on-board charger 10 needs to work, the third switch K2 in the first discharge circuit is first controlled to be closed to make the first pre-charge circuit conductive, and then the first switch K1 is controlled to be turned on, so that the first switch K1 bears the voltage difference between the two ends of the first pre-charge resistor, the voltage difference is small, and the reliability is high, realizing that the power battery 20 discharges to the user equipment connected to the first charging port 60 through the first discharge circuit of the bidirectional on-board charger 10.

[0040] In an embodiment, the second pre-charge circuit 40 comprises a fourth switch K4 and a second pre-charge resistor, which are connected in series.

[0041] In the working process of the first discharge circuit, when the second discharge circuit of the bidirectional on-board charger 10 needs to work, the fourth switch K4 in the second discharge circuit is first controlled to be closed, so that the second pre-charge circuit is turned on, and then the second switch K3 is controlled to be turned on, so that the second switch K3 bears a voltage difference across the second pre-charge resistor, the voltage difference is small, and the reliability is high, thereby realizing the discharge of the power battery 20 to the user equipment connected to the second charging port 70 through the second discharge circuit of the bidirectional on-board charger 10.

[0042] In an embodiment, as shown in Figure 1 The control end of the bidirectional on-board charger 10 is connected to the vehicle controller 50, and is used to obtain the discharge instruction sent by the vehicle controller 50.

[0043] The vehicle controller 50 is connected to the control end of the bidirectional on-board charger 10 and the control end of the power battery 20 through a signal line, so as to control the bidirectional on-board charger 10 and the power battery 20 to enter or exit the discharge mode.

[0044] The working principle of the above-mentioned in-vehicle discharge system is as follows:

[0045] The vehicle controller 50 controls the vehicle to enter or exit the off-vehicle discharge mode, the in-vehicle discharge mode, or switch from the single-path discharge mode to the double-path simultaneous discharge mode according to the condition of the vehicle and the operation of the user.

[0046] When the vehicle controller 50 instructs to enter the off-vehicle discharge mode, the bidirectional on-board charger 10 controls the first switch K1 to be closed, and the remaining switches are kept open, and then the bidirectional on-board charger enters the inverter mode to invert the high-voltage direct current of the power battery 20 into 220V alternating current, so that the electric appliance can take power from the alternating current charging port; when the vehicle controller 50 instructs to exit the off-vehicle discharge, the bidirectional on-board charger 10 stops inverting, and then controls the first switch K1 to be opened.

[0047] When the vehicle controller 50 instructs to enter the in-vehicle discharge mode, the bidirectional on-board charger 10 controls the second switch K3 to be closed, and the remaining switches are kept open, and then the bidirectional on-board charger enters the inverter mode to invert the high-voltage direct current of the power battery 20 into 220V alternating current, so that the electric appliance can take power from the alternating current charging port. When the vehicle controller 50 instructs to exit the off-vehicle discharge, the bidirectional on-board charger 10 stops inverting, and then controls the second switch K3 to be opened.

[0048] When the whole vehicle is in the off-board discharging mode, the first switch K1 is closed, and the off-board discharging circuit is turned on. At this time, the whole vehicle simultaneously starts the on-board discharging circuit, and the bidirectional vehicle-mounted charger 10 controls the fourth switch K4 to be closed. Due to the existence of the pre-charging resistor R2, the impact current is greatly reduced at the moment of closing, and the closing attraction of the fourth switch K4 can be realized. After the second pre-charging circuit 40 is turned on, the voltage difference of the second switch K3 is the voltage difference between the two ends of the second pre-charging resistor, which is relatively small compared with 220V. The voltage difference can be controlled within a reasonable range. At this time, the second switch K3 can be directly closed to realize the uninterrupted switching of the single-circuit discharging to the double-circuit discharging. The switching from the on-board discharging mode to the double-circuit simultaneous discharging mode is the same, and will not be described here.

[0049] In this embodiment, the discharge mode switching of the bidirectional vehicle-mounted charger 10 is controlled by the whole vehicle controller 50, the voltage difference between the two ends of the switch contact in the discharging circuit is controlled within a reasonable range, and the uninterrupted switching from the single-circuit discharging to the double-circuit discharging is realized.

[0050] In an embodiment, the first charging port 60 is an alternating current charging port, and the second charging port 70 is an on-board discharging socket.

[0051] Among them, the alternating current charging port is suitable for camping scene to use the first discharging circuit to supply power to the induction cooker, at this time, the user rests in the car, uses the on-board discharging socket to supply power to the user's electronic equipment by using the second discharging circuit. Due to the effect of the pre-charging resistor in the pre-charging circuit, there will be no temporary power failure outside, and the induction cooker will not stop working.

[0052] In an embodiment, as shown in Figure 1 The output end of the first pre-charging circuit 30 is connected to the first charging port 60, and the input end of the first pre-charging circuit 30 is connected to the power supply output end L of the bidirectional vehicle-mounted charger. By controlling the first pre-charging circuit in the first discharging circuit to be turned on, and then controlling the first switch K1 to be turned on, the power battery 20 discharges to the user equipment connected to the first charging port 60 through the first electric circuit of the bidirectional vehicle-mounted charger 10.

[0053] In an embodiment, as shown in Figure 1 The output end of the second pre-charging circuit 40 is connected to the second charging port 70, and the input end of the second pre-charging circuit 40 is connected in parallel with the input end of the first pre-charging circuit 30. By controlling the second pre-charging circuit 40 in the second discharging circuit to be turned on, and then controlling the second switch K3 to be turned on, the power battery 20 discharges to the user equipment connected to the second charging port 70 through the second discharging circuit of the bidirectional vehicle-mounted charger 10.

[0054] In an embodiment, the first switch K1 and the second switch K3 are relays. That is, a first relay is arranged in the first discharging circuit, and a second relay is arranged in the second discharging circuit, and the first relay and the second relay are used as main relays to control the on-off of the discharging circuits. The fourth switch K4 and the third switch K2 are relays. That is, a third relay is arranged in the first pre-charging circuit 30, and a fourth relay is arranged in the second pre-charging circuit 40, and the third relay and the fourth relay are used to control the on-off of the respective pre-charging circuits.

[0055] In an embodiment, a new energy vehicle is provided, which comprises a vehicle body and an in-vehicle discharging system arranged in the vehicle body, and the in-vehicle discharging system can be the in-vehicle discharging system in any one of the preceding embodiments.

[0056] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalent ones; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. An in-vehicle discharge system for a new energy vehicle, characterized in that, The in-vehicle discharge system includes: The bidirectional on-board charger and the power battery are provided. The input end of the bidirectional on-board charger is connected to the output end of the power battery. The bidirectional on-board charger is provided with a first discharge circuit and a second discharge circuit. The output end of the first discharge circuit is connected to a first charging port, and the output end of the second discharge circuit is connected to a second charging port. The first discharge circuit and / or the second discharge circuit are provided with a switch and a pre-charge circuit connected in parallel across the switch.

2. The in-vehicle discharge system according to claim 1, characterized in that, A first switch is connected in series in the first discharge circuit, and a first pre-charge circuit is connected in parallel across the two ends of the first switch.

3. The in-vehicle discharge system according to claim 2, characterized in that, A second switch is connected in series in the second discharge circuit, and a second pre-charge circuit is connected in parallel across the two ends of the second switch.

4. The in-vehicle discharge system according to claim 2, characterized in that, The first pre-charge circuit includes a third switch and a first pre-charge resistor, which are connected in series.

5. The in-vehicle discharge system according to claim 3, characterized in that, The second precharge circuit includes a fourth switch and a second precharge resistor, which are connected in series.

6. The in-vehicle discharge system according to claim 1, characterized in that, The control terminal of the bidirectional on-board charger is connected to the vehicle controller and is used to obtain the discharge command sent by the vehicle controller.

7. The in-vehicle discharge system according to claim 1, characterized in that, The first charging port is an AC charging port, and the second charging port is an in-vehicle discharge socket.

8. The in-vehicle discharge system according to claim 3, characterized in that, The output terminal of the first pre-charge circuit is connected to the first charging port, and the input terminal of the first pre-charge circuit is connected to the power supply output terminal of the bidirectional on-board charger.

9. The in-vehicle discharge system according to claim 8, characterized in that, The output terminal of the second precharge circuit is connected to the second charging port, and the input terminal of the second precharge circuit is connected in parallel with the input terminal of the first precharge circuit.

10. A new energy vehicle, characterized in that, The new energy vehicle includes a vehicle body and an in-vehicle discharge system as described in any one of claims 1 to 9, which is installed in the vehicle body.

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