CN210733865U

CN210733865U - Electric vehicle charging protection device

Info

Publication number: CN210733865U
Application number: CN201921653147.5U
Authority: CN
Inventors: 卜胜; 李桉楠; 周雯雯; 季金强; 王锐
Original assignee: Yangzhou Yaxing Motor Coach Co ltd
Current assignee: Yangzhou Yaxing Motor Coach Co ltd
Priority date: 2019-09-29
Filing date: 2019-09-29
Publication date: 2020-06-12
Anticipated expiration: 2029-09-29

Abstract

The utility model belongs to the technical field of the vehicle charges, concretely relates to electric vehicle charging protection device. Including battery, first relay, master switch and low pressure load, the battery positive pole connects gradually the coil of first relay and master switch to the anodal of low pressure load, and the negative pole of low pressure load is connected to the battery negative pole and forms the return circuit, and the battery both ends still connect in parallel has BMS, still includes the rifle that charges, and the rifle that charges is connected to the end of awakening up of BMS through first relay, and first relay is used for switching the break-make of rifle and BMS that charges. The charging device is used for solving the problem that the electric equipment is damaged due to the fact that the main switch is forgotten to be turned off during charging; the utility model discloses a few hardware drops into, avoids the consumer online when making whole car charge, has protected the consumer, improves charge efficiency, and the input cost is low, has increased the security when charging.

Description

Electric vehicle charging protection device

Technical Field

The utility model belongs to the technical field of the vehicle charges, concretely relates to electric vehicle charging protection device.

Background

In recent years, new energy automobiles have been rapidly developed under the push of national policies due to the advantages of low emission and low pollution. But the nonstandard charging operation threatens the charging safety of the pure electric passenger car, and China also promulgates relevant standards in recent years to standardize the charging industry of the pure electric passenger car.

At present, the following steps should be followed when the pure electric bus executes the charging process: firstly, the key is turned to an OFF position, then a main power switch is disconnected, then a charging gun is connected, the charging gun charges the storage battery through a battery management system BMS (Battery management System), and after charging is finished, the charging gun is pulled out and put back to the original position after the charging pile displays that the charging gun is pulled out. However, in the actual situation, many charging personnel forget to turn off the main power switch during charging, and directly perform charging operation. Thus, electrical equipment can be damaged, and charging efficiency is not high and electric energy is wasted due to on-load charging. Meanwhile, as the main switch of the power supply is not disconnected, the key can still be twisted to carry out high voltage running when the whole vehicle is charged, and the potential safety hazard that the cable is broken by the vehicle exists.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in overcoming the not enough of prior art, provides an electric motor car protection device that charges for forget when solving and close the problem that master switch leads to electrical equipment to damage.

The utility model provides an above-mentioned technical problem's technical scheme as follows: the utility model provides an electric vehicle charging protection device, includes battery, first relay, master switch and low pressure load, the battery positive pole connects gradually the coil and the master switch of first relay extremely the anodal of low pressure load, the negative pole of low pressure load is connected to the battery negative pole forms the return circuit, the battery both ends still connect in parallel has BMS, still includes the rifle that charges, the rifle warp that charges first relay is connected to the end of awakening up of BMS, first relay is used for switching the rifle that charges with the break-make of BMS.

Further, the charging gun is connected with a common terminal of the first relay, and a normally closed terminal of the first relay is connected with a wake-up terminal of the BMS.

Further, still include second relay and key switch, the rifle that charges is connected to through the coil end of second relay the public end of first relay, the second relay still is connected between key switch and BMS, and key switch one end is connected to master switch keeps away from the one end of battery, and the other end is connected the second relay, the second relay is used for the control to switch the key switch with the break-make of BMS.

Further, the public end of the second relay is connected with the ON gear of the key switch, the normally closed end of the second relay is connected with the awakening end of the BMS, and the normally open end of the second relay is suspended.

Furthermore, the first relay is also connected with an alarm module, and the alarm module is connected to the normally open contact of the first relay.

Furthermore, the alarm module is a sound and light alarm module.

The utility model has the advantages that:

1. under the condition that a main switch is not disconnected, when a charging gun is inserted for charging, the first relay is switched to a normally open end and is not connected with a wake-up end of the BMS, the BMS does not work, and therefore the whole vehicle cannot be charged;

2. the normally opened end of the first relay is also connected with an audible and visual alarm module, when the main switch is closed for charging, the charging gun is connected with the audible and visual alarm module for alarming, the main switch is not switched off at the moment, and the electric equipment is electrified to play a role in reminding;

3. a second relay is additionally arranged between the key switch and the BMS, when the vehicle is driven, the key switch and the awakening end of the BMS are connected, the BMS can be awakened to work through the key switch, when a charging gun needs to be charged and inserted, the second relay is switched to a normally open end to be suspended, the key switch cannot awaken the BMS to work and charge, and safety accidents caused by power-on driving due to the fact that the key switch is connected by mistake are avoided;

4. through the access of a small amount of components and parts, avoid the consumer online when making whole car charge, protected the consumer, improve charge efficiency, the input cost is low, has increased the security when charging.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a block diagram of the overall structure according to embodiment 1 of the present invention;

fig. 2 is a block diagram of the overall structure according to embodiment 2 of the present invention.

Reference numerals:

1-a storage battery; 2-BMS; 3-a first relay; 4-a master switch; 5-low voltage load; 6-a charging gun; 7-a second relay; 8-key switch; 9-acousto-optic alarm module.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience of description and simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Example 1

As shown in fig. 1, the utility model provides an electric vehicle charging protection device, including battery 1, first relay 3, master switch 4 and low voltage load 5, battery 1 is anodal to connect gradually the coil of first relay 3 and the positive pole of master switch 4 to low voltage load 5, the negative pole of low voltage load 5 is connected to battery 1 negative pole and forms the return circuit, battery 1 both ends still connect in parallel has BMS2, wherein battery 1 is 24V battery 1, still include charging gun 6, charging gun 6 is connected to the end of awakening up of BMS2 through first relay 3, first relay 3 is used for switching charging gun 6 and BMS 2's break-make. Wherein, the normally closed route of rifle 6 through first relay 3 connects to the end of awakening up of BMS2, the common port of first relay 3 is connected to rifle 6 promptly charges, the end of awakening up of BMS2 is connected to the normally closed end of first relay 3, the end of opening normally of first relay 3 is connected with alarm module, concrete alarm module is acousto-optic warning module 9, when master switch 4 disconnection, first relay 3 just connects the end of awakening up of normally closed route switch-on rifle 6 and BMS2, can charge, when master switch 4 closure, first relay 3 switches to the end of opening normally, make rifle 6 switch-on acousto-optic warning module 9 charges, send alarm signal, remind operating personnel to break off master switch 4 otherwise can't charge, simultaneously discontiguous BMS 2's end of awakening up, battery 1 can't charge.

Example 2

As shown in fig. 2, based on embodiment 1, embodiment 2 further includes a second relay 7 and a key switch 8, the charging gun 6 is connected to the common terminal of the first relay 3 via a coil terminal of the second relay 7, the second relay 7 is further connected between the key switch 8 and the BMS2, and the key switch 8 is connected at one end to the end of the main switch 4 away from the battery 1 and at the other end to the second relay 7, and the second relay 7 is used for controlling the switching of the key switch 8 and the BMS 2. Wherein, the key switch 8 is connected to the awakening end of the BMS2 through the normally closed path of the second relay 7, that is, the common end of the second relay 7 is connected to the ON-gear of the key switch 8, the normally closed end of the second relay 7 is connected to the awakening end of the BMS2, and the normally open end of the second relay 7 is suspended.

In practical application, the whole charging protection device comprises a first relay 3, a second relay 7 and a key switch 8, and a 24V storage battery 1 supplies power to a BMS2 and a low-voltage load 5; BMS2 for battery management; the first relay is used for controlling the awakening BMS2 and controlling the sound-light alarm module 9 to work; the main switch 4 controls the on-off of the low voltage electricity of the whole vehicle; the A +24V voltage signal of the direct current charging gun 6 is used for waking up the BMS2 and also can supply power for the sound and light alarm module 9; the second relay is used to control the key switch 8 to wake up the BMS 2. When the driving process need not charge, because master switch 4 is closed and rifle 6 that charges does not insert, the normal start end of first relay 3 switch-on does not awaken up BMS2, BMS2 is connected to second relay 7 switch-on normal close end, the ascending edge signal that sends when starting through key switch 8 awakens up BMS2 work, can awaken up BMS2 work through key switch 8 during the driving and guarantee normal driving, owing to do not insert rifle 6 that charges at this moment, then acousto-optic warning module 9 does not break up out of work. When the vehicle need charge, if closed master switch 4, first relay work this moment, the normally closed contact a disconnection of first relay 3, normally open contact b is closed, and after inserting charging gun 6, A + signal access, BMS2 can not awaken up, and acousto-optic warning module 9 works simultaneously, reminds the personnel of charging to close master switch 4. At this in-process, the work of second relay, the normally open a contact closure of second relay 7, the disconnection of normally closed b contact, wrench movement key switch 8 to the ON shelves this moment, BMS2 likewise can not awaken up, can not carry out the flow of charging, when guaranteeing that master switch 4 is closed, first relay 3 and second relay 7 can not awaken up BMS 2. After master switch 4 breaks off, first relay 3 falls the power failure and does not work, and normally closed contact a of first relay 3 is closed, and normally open contact b disconnection is inserted and is charged rifle 6, and BMS2 is awaken up this moment, begins the flow of charging, and acousto-optic warning module 9 no longer works simultaneously. In the charging process, because master switch 4 closes, and second relay 7 works, the normally closed contact b of second relay 7 breaks off, and normally open contact a is closed, and the key switch 8 is twisted to this moment, and the whole car can not go up the high pressure and the driving, when guaranteeing to charge, prevents the incident that the mistake touched key switch 8 and produced.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention 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 described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The utility model provides an electric motor car protection device that charges which characterized in that: including battery, first relay, master switch and low pressure load, the battery positive pole connects gradually the coil and the master switch of first relay extremely the anodal of low pressure load, the negative pole of low pressure load is connected to the battery negative pole forms the return circuit, the battery both ends are still parallelly connected to have BMS, still include the rifle that charges, the rifle warp that charges first relay is connected to the end of awakening up of BMS, first relay is used for switching the rifle that charges with the break-make of BMS.

2. The charging protection device for the electric vehicle according to claim 1, wherein: the charging gun is connected with a common end of the first relay, and a normally closed end of the first relay is connected with a wake-up end of the BMS.

3. The charging protection device for the electric vehicle according to claim 2, wherein: still include second relay and key switch, the rifle that charges is through the coil end of second relay is connected to the common terminal of first relay, the second relay is still connected between key switch and BMS, just key switch one end is connected to master switch keeps away from the one end of battery, and the other end is connected the second relay, the second relay is used for the control to switch key switch with the break-make of BMS.

4. The charging protection device for electric vehicle as claimed in claim 3, wherein: the public end of the second relay is connected with the ON gear of the key switch, the normally closed end of the second relay is connected with the awakening end of the BMS, and the normally open end of the second relay is suspended.

5. The charging protection device for the electric vehicle according to claim 2, wherein: the first relay is further connected with an alarm module, and the alarm module is connected to the normally open contact of the first relay.

6. The charging protection device for the electric vehicle according to claim 5, wherein: the alarm module is a sound and light alarm module.