CN218702804U - Vehicle charging system and vehicle - Google Patents

Abstract

The utility model discloses a vehicle charging system and vehicle. The vehicle charging system includes: the charging interface, the charging module and the charging control module; the charging module includes: the battery pack comprises a first battery module, a second battery module, a first switch unit, a second switch unit and a third switch unit; the first switch unit, the first battery module, the second battery module and the second switch unit are sequentially connected in series between a first charging port and a second charging port of the charging interface; defining a connection node between the first battery module and the second battery module as a first node, wherein a first end of a third switch unit is electrically connected with the first node, a second end of the third switch unit is electrically connected with a first charging port of a charging interface, and a third end of the third switch unit is electrically connected with a second charging port of the charging interface; the charging control module is electrically connected with each switch unit respectively. The utility model discloses can improve the vehicle and fill electric pile's compatibility to different voltage classes.

Description

Vehicle charging system and vehicle

Technical Field

The utility model relates to an electric automobile technical field especially relates to a vehicle charging system and vehicle.

Background

With the rapid development of electric vehicle technology, the voltage level of a high-voltage system in an electric vehicle is continuously increased, an 800V system is developed and distributed, and the charging rate is also continuously increased, so that the endurance anxiety of electric vehicle users is relieved and the problem of long charging time is solved for the pain points of the users. However, the existing passenger vehicle for the electric automobile mainly uses a 400V platform, correspondingly, charging piles on the market are generally low-voltage charging piles with a voltage grade of 400V, charging facilities are limited by factors such as cost and the like, cannot be upgraded and modified in time, and are difficult to popularize in a short time when the high-voltage charging piles with 800V are built, so that the charging facilities cannot adapt to rapid change of the voltage grade of a high-voltage system in the electric automobile. Therefore, the compatibility of the existing electric automobile and the charging pile is poor, the electric automobile with high voltage level is easy to charge the charging pile without correspondence, and the embarrassing situation that the electric automobile cannot be charged by the pile exists.

SUMMERY OF THE UTILITY MODEL

The utility model provides a vehicle charging system and vehicle to improve the vehicle and to filling the compatibility of electric pile, make the electric automobile of high voltage level both can adopt the low pressure to fill electric pile and charge, also can adopt the high pressure to fill electric pile and charge.

In a first aspect, an embodiment of the present invention provides a vehicle charging system, including: the charging interface, the charging module and the charging control module;

the charging module includes: the battery pack comprises a first battery module, a second battery module, a first switch unit, a second switch unit and a third switch unit;

the first switch unit, the first battery module, the second battery module and the second switch unit are sequentially connected in series between a first charging port and a second charging port of the charging interface; defining a connection node between the first battery module and the second battery module as a first node, wherein a first end of a third switch unit is electrically connected with the first node, a second end of the third switch unit is electrically connected with a first charging port of the charging interface, and a third end of the third switch unit is electrically connected with a second charging port of the charging interface;

the charging control module is respectively electrically connected with the first switch unit, the second switch unit and the third switch unit, and is used for controlling the on-off states of the first switch unit, the second switch unit and the third switch unit according to the voltage level of a charging pile connected with the charging interface.

Optionally, the first switching unit includes: a first relay; and the static contact of the first relay is electrically connected with a first charging port of the charging interface, and the movable contact of the first relay is electrically connected with the first battery module.

Optionally, the second switching unit includes: a second relay; and the static contact of the second relay is electrically connected with a second charging port of the charging interface, and the movable contact of the second relay is electrically connected with the second battery module.

Optionally, the third switching unit includes: a third relay;

the movable contact of the third relay is electrically connected with the first node, the first stationary contact of the third relay is electrically connected with the first charging port of the charging interface, and the second stationary contact of the third relay is electrically connected with the second charging port of the charging interface.

Optionally, the third switching unit includes: a fourth relay and a fifth relay;

the movable contact of the fourth relay and the movable contact of the fifth relay are both electrically connected with the first node, the static contact of the fourth relay is electrically connected with the first charging port of the charging interface, and the static contact of the fifth relay is electrically connected with the second charging port of the charging interface.

Optionally, the charging module further comprises: and the first overcurrent protection unit is connected between the first switch unit and the first battery module.

Optionally, the charging module further comprises: and the second overcurrent protection unit is connected between the first node and the first end of the third switching unit.

Optionally, the first overcurrent protection unit includes: the first fuse is connected between the first switch unit and the first battery module; the second overcurrent protection unit includes: a second fuse connected between the first node and a first end of the third switching unit;

the rated voltage of the second fuse is half of the rated voltage of the first fuse.

Optionally, the vehicle charging system further includes: and the current sensor is arranged between the charging interface and the charging module.

In a second aspect, the embodiment of the present invention further provides a vehicle, including: the utility model discloses arbitrary embodiment provides a vehicle charging system.

The embodiment of the utility model provides an among the vehicle charging system, be provided with the interface that charges, the control module that charges and the module of charging, based on the control of the control module that charges each switch unit in to the module of charging, can change vehicle battery's charging route and the mode of charging for the vehicle of high voltage level both can the adaptation high pressure fill electric pile, but the electric pile is filled to adaptation low pressure again, is favorable to improving vehicle convenience of use, is favorable to promoting the using widely of high voltage level vehicle. And, the embodiment of the utility model provides an original interface structure of vehicle battery is not changed, and the interface that charges still only includes a pair of port that charges, only adds the switch unit in the module inside that charges, can realize the improvement to the vehicle suitability with lower cost. Therefore, compare in prior art, the embodiment of the utility model provides a can improve the vehicle and fill electric pile's compatibility to different voltage classes.

It should be understood that the statements herein are not intended to identify key or critical features of any embodiment of the present invention, nor are they intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.

Drawings

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

Fig. 1 is a schematic structural diagram of a vehicle charging system provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of another vehicle charging system provided in the embodiment of the present invention;

fig. 3 is a schematic structural diagram of another vehicle charging system according to an embodiment of the present invention.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

The embodiment of the utility model provides a vehicle charging system. Fig. 1 is a schematic structural diagram of a vehicle charging system according to an embodiment of the present invention. Referring to fig. 1, the vehicle charging system includes: charging interface 10, charging control module 20 and charging module 30. The charging module 30 includes: a first battery module E1, a second battery module E2, a first switching unit 31, a second switching unit 32, and a third switching unit 33. The charging interface 10 includes a first charging port P1 and a second charging port P2.

The first switch unit 31, the first battery module E1, the second battery module E2, and the second switch unit 32 are sequentially connected in series between the first charging port P1 and the second charging port P2 of the charging interface 10. A connection node between the first battery module E1 and the second battery module E2 is defined as a first node N1. A first end of the third switching unit 33 is electrically connected to the first node N1, a second end of the third switching unit 33 is electrically connected to the first charging port P1 of the charging interface 10, and a third end of the third switching unit 33 is electrically connected to the second charging port P2 of the charging interface 10. The charging control module 20 is electrically connected to the first switch unit 31, the second switch unit 32, and the third switch unit 33, respectively, and the charging control module 20 is configured to control the switching states of the first switch unit 31, the second switch unit 32, and the third switch unit 33 according to the voltage class of the charging pile to which the charging interface 10 is connected.

For example, the charging Control module 20 may be an onboard controller such as a VCU Vehicle Control Unit (VCU) or a BMS Battery Management System (Battery Management System) for controlling the charging and discharging processes of each Battery module. When the charging interface 10 is connected to the charging pile, the first charging port P1 and the second charging port P2 are respectively connected to the positive and negative output ports of the charging pile. Illustratively, the charging interface 10 may further include a communication port Pc connected to the charging control module 20. Then, when the charging interface 10 is connected to the charging pile, the communication port Pc can be connected to the communication port of the charging pile, so that the charging control module 20 communicates with the charging pile. The charging control module 20 can analyze the voltage level of the charging pile through an identification message, such as a handshake message, between the charging pile and the charging pile, and accordingly control the on-off state of each switch unit, so as to realize control of the charging process of each battery module.

Illustratively, the first battery module E1 and the second battery module E2 are battery modules having the same rated voltage and capacity, for example, battery modules each having a voltage of 400V. Each charging module can be formed by combining a plurality of single batteries in series and parallel, and the structure of the battery module is not limited here. Illustratively, the first charging port P1 of the charging interface 10 is a positive input terminal of the battery pack, and the second charging port P2 is a negative input terminal of the battery pack. Then, the specific connection manner of the series structure from the first charging port P1 to the second charging port P2 may be: a first end of the first switch unit 31 is electrically connected to the first charging port P1, a second end of the first switch unit 31 is electrically connected to an anode of the first battery module E1, a cathode of the first battery module E1 is electrically connected to an anode of the second battery module E1, a cathode of the second battery module E1 is electrically connected to a first end of the second switch unit 32, and a second end of the second switch unit 32 is electrically connected to the second connection port P2. Each switch unit may be composed of a controllable switch device such as a transistor or a relay, and a peripheral circuit thereof.

Illustratively, when charging piles of different voltage levels are connected, the charging modes of the vehicle charging system are respectively as follows:

1. when a high-voltage charging pile, such as an 800V charging pile, is connected, the charging control module 20 controls the first switch unit 31 to be connected, controls the second switch unit 32 to be connected, controls the first end and the second end of the third switch unit 33 to be disconnected, and controls the first end and the third end of the third switch unit 33 to be disconnected, so that the first battery module E1 and the second battery module E2 form a series structure, and the two battery modules are charged simultaneously.

2. When a low-voltage charging pile, such as a 400V charging pile, is connected, first, the charging control module 20 controls the first switch unit 31 to be connected, controls the first end and the third end of the third switch unit 33 to be connected, controls the second switch unit 32 to be disconnected, and controls the first end and the second end of the third switch unit 33 to be disconnected, so that a charging path from the first charging port P1 to the second charging port P2 through the first battery module E1 is formed, and the charging pile charges the first battery module E1.

After the first battery module E1 is charged for the preset time, the charging control module 20 firstly controls the first switch unit 31 to be turned off, and controls the first end and the third end of the third switch unit 33 to be turned off, so as to stop the charging process; and then the second switch unit 32 is controlled to be conducted, and the first end and the second end of the third switch unit 33 are controlled to be conducted, so that a charging path from the first charging port P1 to the second charging port P2 through the second battery module E2 is formed, and the charging pile is safely switched to charge the second battery module E2.

After the second battery module E2 is charged for the preset time, the charging control module 20 switches the on-off state of each switch unit again, so that the charging pile is safely switched to charge the first battery module E1. Like this in turn charges two battery module, and it is all full of to be all full of up to two battery module, perhaps the car owner stops to charge. Illustratively, the preset time may be set between 10 minutes and 30 minutes, such as 10 minutes, 15 minutes, 20 minutes, 25 minutes, or 30 minutes. The benefit of this arrangement is: the charging method can avoid overlarge voltage and electric quantity difference of the two battery modules caused by overlong single-module charging time, and can also avoid overlow charging efficiency caused by too frequent switching due to too short single-module charging time.

To sum up, the embodiment of the utility model provides an among the vehicle charging system, be provided with the interface 10 that charges, the control module 20 that charges and the module 30 that charges, based on the control of the control module 20 to each switch unit in the module 30 that charges, can change vehicle battery's the route of charging and the mode of charging for the vehicle of high voltage level both can the adaptation high pressure fill electric pile, but the electric pile is filled to adaptation low pressure again, is favorable to improving vehicle convenience of use, is favorable to promoting the using widely of high voltage level vehicle. And, the embodiment of the utility model provides an original interface structure of vehicle battery is not changed, and interface 10 that charges still only includes a pair of port that charges, only is charging the inside switch unit that adds of module 30, can realize the improvement to the vehicle suitability with lower cost. Therefore, compare in prior art, the embodiment of the utility model provides a can realize the improvement of the compatibility of vehicle to different voltage class charging pile with lower cost.

On the basis of the above embodiments, optionally, during the charging period of the low-voltage-level charging pile, a discharging loop of the vehicle can be locked through a self-locking function in the charging control module, and the vehicle is prohibited from performing high-voltage discharging, so as to avoid damage to the vehicle due to different charging and discharging voltage levels.

The above embodiments exemplarily describe the operation process of each functional module in the vehicle charging system, and the following describes the possible structure of each functional module, but the invention is not limited thereto.

Fig. 2 is a schematic structural diagram of another vehicle charging system provided in the embodiment of the present invention. Referring to fig. 2, in one embodiment, the first switching unit 31 optionally includes: a first relay K1; the static contact of the first relay K1 is electrically connected with the first charging port P1 of the charging interface, and the movable contact of the first relay K1 is electrically connected with the first battery module E1. The second switching unit 32 includes: a second relay K2; the static contact of the second relay K2 is electrically connected with the second charging port P2 of the charging interface, and the movable contact of the second relay K2 is electrically connected with the second battery module E1.

Specifically, when the first charging port P1 is used as a positive input end and the second charging port P2 is used as a negative input end, the movable contact of the first relay K1 is electrically connected with the positive electrode of the first battery module E1; and the negative electrode of the second battery module E2 is electrically connected with the movable contact of the second relay K2.

For example, the first relay K1 and the second relay K2 are single-pole single-throw switch relays, and the movable contact of the relays may be in contact with or not in contact with the stationary contact under the control of the charging control module, so as to achieve the on and off of the corresponding switch units. It should be noted that fig. 2 mainly shows the connection relationship of the contacts of the relay in the high-voltage charging circuit, and the connection of the weak current control portion of the relay (for example, the connection between each relay coil and the charging control module) is not shown.

With continued reference to fig. 2, in one embodiment, the third switching unit 33 optionally includes: and a third relay K3. The third relay K3 is a single-pole double-throw switch relay. Specifically, a movable contact of the third relay K3 is electrically connected to the first node N1, a first stationary contact of the third relay K3 is electrically connected to the first charging port P1 of the charging interface, and a second stationary contact of the third relay K3 is electrically connected to the second charging port P2 of the charging interface. The movable contact of the third relay K3 can be contacted with the first fixed contact under the control of the charging control module, or contacted with the second fixed contact, or suspended and not contacted with the two fixed contacts, thereby realizing the control of the on-off state of the third switch unit.

The above embodiments exemplarily illustrate that the third switching unit 33 is formed by a single-pole double-throw switching relay, but not as a limitation to the present invention. In other embodiments, the third switching unit 33 may have other structures.

Fig. 3 is a schematic structural diagram of another vehicle charging system according to an embodiment of the present invention. Fig. 3 also mainly shows the connection relationship of the contacts of the relay in the high-voltage charging circuit, and the connection of the weak current control part of the relay is not shown. Referring to fig. 3, in another embodiment, optionally, the third switching unit 33 includes: a fourth relay K4 and a fifth relay K5. The movable contact of the fourth relay K4 and the movable contact of the fifth relay K5 are both electrically connected with the first node N1, the stationary contact of the fourth relay K4 is electrically connected with the first charging port P1 of the charging interface, and the stationary contact of the fifth relay K5 is electrically connected with the second charging port P5 of the charging interface.

In this embodiment, the fourth relay K4 and the fifth relay K5 may be single-pole single-throw switch relays, the moving contacts of the two relays may be in contact with the stationary contacts or not under the control of the charging control module, and the switching state of the third switching unit 33 may be controlled by the matching of the switching states of the two relays.

With continued reference to fig. 3, on the basis of the above embodiments, optionally, the charging module 30 further includes: and the first overcurrent protection unit 34 is connected between the first switch unit 31 and the first battery module E1, and is used for realizing overcurrent protection in the charging mode of the high-voltage charging pile. For example, the first overcurrent protection unit 34 may be formed of an overcurrent protection element such as a fuse.

Further, the charging module further includes: the second overcurrent protection unit 35 is connected between the first node N1 and the first end of the third switching unit 33. Because the transmission path between the connection node N1 and the first end of the third switching unit 33 is a common transmission path of the two battery module charging circuits in the low-voltage charging pile charging mode, and the second overcurrent protection unit 35 is disposed on the common transmission path, overcurrent protection of the two battery module charging circuits in the low-voltage charging pile charging mode can be realized, so that the number of overcurrent protection units is reduced, and cost reduction is facilitated.

With continued reference to fig. 3, on the basis of the above embodiments, optionally, the first overcurrent protection unit 34 includes: the first fuse F1 is connected between the first switching unit 31 and the first battery module E1. And, the second overcurrent protection unit 35 includes: the second fuse F2 is connected between the first node N1 and the first end of the third switching unit 33. Since the charging voltage of the low-voltage charging pile charging mode is half that of the high-voltage charging pile charging mode, the specification of the second fuse F2, for example, the rated voltage is also set to be half that of the first fuse F1.

With continued reference to fig. 3, on the basis of the foregoing embodiments, optionally, the vehicle charging system further includes: the current sensor 40 is disposed between the charging interface and the charging module 30, and specifically may be disposed between the first charging port P1 and the first switch unit 31, or between the second charging port P2 and the second switch unit 32. The output of the current sensor 40 may be electrically connected to the charging control module so that the charging control module controls the charging mode in real time according to the charging current.

In this embodiment, the current sensor 40 is disposed between the charging interface and the charging module 30, which is equivalent to disposing the current sensor 40 near the outer end of the battery pack and at the common portion of the charging loop in the high-voltage and low-voltage charging modes, so that only one current sensor 40 is disposed to achieve current collection in different charging modes, thereby reducing the number of current sensors 40 and facilitating cost reduction.

In addition to the above embodiments, alternatively, during actual use, SOC (State of Charge) calculation may be performed on the first battery module E1 and the second battery module E2 individually, and the battery module with a smaller SOC may be used as the effective SOC of the entire battery pack to the outside, and the vehicle operating State may be controlled accordingly.

To sum up, the embodiment of the utility model provides a vehicle charging system adopts the standard interface that charges of former car, on the basis that does not change the charging circuit design of whole car, only through increasing 2 relays and 1 fuse for the vehicle can be compatible 400V and two kinds of electric pile that fill of 800V, improves the suitability of vehicle.

The embodiment of the utility model provides a vehicle is still provided, include the utility model discloses the vehicle charging system that arbitrary embodiment provided possesses corresponding beneficial effect. The vehicle provided with the vehicle charging system can be charged by adopting charging equipment with different voltage levels, thereby effectively improving the universality of the vehicle and the sharing property of the charging equipment and reducing the construction cost of the charging equipment special for the vehicle.

The above detailed description does not limit the scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A vehicle charging system, comprising: the charging interface, the charging module and the charging control module;

the charging module includes: the battery pack comprises a first battery module, a second battery module, a first switch unit, a second switch unit and a third switch unit;

the first switch unit, the first battery module, the second battery module and the second switch unit are sequentially connected in series between a first charging port and a second charging port of the charging interface; defining a connection node between the first battery module and the second battery module as a first node, wherein a first end of a third switch unit is electrically connected with the first node, a second end of the third switch unit is electrically connected with a first charging port of the charging interface, and a third end of the third switch unit is electrically connected with a second charging port of the charging interface;

the charging control module is respectively electrically connected with the first switch unit, the second switch unit and the third switch unit, and is used for controlling the on-off states of the first switch unit, the second switch unit and the third switch unit according to the voltage level of a charging pile connected with the charging interface.

2. The vehicle charging system according to claim 1, wherein the first switching unit includes: a first relay; and the static contact of the first relay is electrically connected with a first charging port of the charging interface, and the movable contact of the first relay is electrically connected with the first battery module.

3. The vehicle charging system according to claim 1, wherein the second switching unit includes: a second relay; and the static contact of the second relay is electrically connected with a second charging port of the charging interface, and the movable contact of the second relay is electrically connected with the second battery module.

4. The vehicle charging system according to claim 1, wherein the third switching unit includes: a third relay;

the movable contact of the third relay is electrically connected with the first node, the first stationary contact of the third relay is electrically connected with the first charging port of the charging interface, and the second stationary contact of the third relay is electrically connected with the second charging port of the charging interface.

5. The vehicle charging system according to claim 1, wherein the third switching unit includes: a fourth relay and a fifth relay;

the movable contact of the fourth relay and the movable contact of the fifth relay are electrically connected with the first node, the static contact of the fourth relay is electrically connected with the first charging port of the charging interface, and the static contact of the fifth relay is electrically connected with the second charging port of the charging interface.

6. The vehicle charging system of claim 1, wherein the charging module further comprises: and the first overcurrent protection unit is connected between the first switch unit and the first battery module.

7. The vehicle charging system of claim 6, wherein the charging module further comprises: and the second overcurrent protection unit is connected between the first node and the first end of the third switching unit.

8. The vehicle charging system according to claim 7, wherein the first overcurrent protection unit includes: the first fuse is connected between the first switch unit and the first battery module; the second overcurrent protection unit includes: a second fuse connected between the first node and a first end of the third switching unit;

the rated voltage of the second fuse is half of the rated voltage of the first fuse.

9. The vehicle charging system according to claim 1, further comprising: and the current sensor is arranged between the charging interface and the charging module.

10. A vehicle, characterized by comprising: the vehicle charging system of any of claims 1-9.

Images