CN220447660U

CN220447660U - BDU high-voltage electric framework of battery pack of passenger car

Info

Publication number: CN220447660U
Application number: CN202321887732.8U
Authority: CN
Inventors: 杨利国
Original assignee: Chuneng New Energy Co Ltd
Current assignee: Chuneng New Energy Co Ltd
Priority date: 2023-07-17
Filing date: 2023-07-17
Publication date: 2024-02-06
Anticipated expiration: 2033-07-17

Abstract

The utility model provides a high-voltage electric framework of a battery BDU of a passenger car, which comprises the following components: the discharging loop and the charging loop are connected in series; the discharging loop comprises a battery, a main positive relay, a pre-charging relay and a pre-charging resistor, one end of the main positive relay is connected with the positive electrode of the battery, the other end of the main positive relay is connected with one end of the charging loop, and the pre-charging relay and the pre-charging resistor are connected in series and then connected with the main positive relay in parallel. The utility model covers the high-voltage architecture of most battery packs of passenger cars, reduces BDU development types and reduces BDU development cost; the BDU is internally provided with an intelligent fuse, so that when a dangerous accident occurs to the automobile, the BDU can timely disconnect a power supply, and the probability of dangerous occurrence is reduced; the electric high-voltage framework can be compatible with a single-double motor scheme of a whole vehicle client and various quick-charging schemes, and has high practicability.

Description

BDU high-voltage electric framework of battery pack of passenger car

Technical Field

The utility model relates to the field of battery management, in particular to a BDU high-voltage electric framework of a battery pack of a passenger car.

Background

BDU, collectively Battery Disconnect Unit, battery pack disconnect unit, is an important accessory in the high voltage circuit of new energy vehicles, which was originally derived from the power distribution unit (Power Distribution Unit, PDU) of the power system. The BDU is directly connected with the power battery through the high-voltage plug-in unit, controls the charging and discharging processes of the electric automobile, and is an important component in a high-voltage loop. Through the development of the electric automobile industry, the device has the characteristics of small volume, multiple loops, high assembly precision, excellent insulating property, good vibration resistance effect, capability of bearing larger load and the like

The prior electrical high-voltage architecture inside the battery pack BDU is mainly input by a whole vehicle client, and different whole vehicle client requirements are inconsistent, namely the battery pack high-voltage architecture is also five-door, and the types and the numbers of electrical components are different, for example, the application number is CN202120666824.8, and a battery pack high-voltage architecture is disclosed in patents with patent names of high-voltage electrical architecture systems and vehicles. Although the framework can meet the requirements of charging and discharging, the suitability of the framework is poor, the requirements of some vehicle structures cannot be met, in order to meet the requirements of whole vehicle users, PACK factories need to develop BDUs of different styles, appearance structures are different from internal electric parts in arrangement, various dies (upper covers and lower shells) need to be opened for the BDUs, the BDU development cost is high, the verification period is relatively long, and project progress is influenced.

Disclosure of Invention

The utility model aims to provide a BDU high-voltage electric framework of a battery pack of a passenger car, which realizes the compatibility of various battery packs of the passenger car.

In order to achieve the above object, the present utility model provides the following technical solutions: a passenger car battery BDU high voltage electrical architecture comprising: a discharge loop and a charge loop, the discharge loop being in series with the charge loop; the discharging loop comprises a battery, a main positive relay, a pre-charging relay and a pre-charging resistor, one end of the main positive relay is connected with the positive electrode of the battery, the other end of the main positive relay is connected with one end of the charging loop, and the pre-charging relay and the pre-charging resistor are connected in series and then connected with the main positive relay in parallel.

Further, the discharging circuit further comprises a main fuse, one end of the main fuse is connected with the positive electrode of the battery, and the other end of the main fuse is connected with one end of the main positive relay.

Further, the discharging circuit further comprises an excitation fuse, the excitation fuse is located between the main fuse and the battery, one end of the excitation fuse is connected with the positive electrode of the battery, and the other end of the excitation fuse is connected with one end of the main fuse.

Further, the charging loop comprises a fast charging positive relay and a fast charging negative relay, one end of the fast charging positive relay is connected with the other end of the main positive relay, the other end of the fast charging positive relay is connected with a fast charging positive interface, one end of the fast charging negative relay is connected with the battery negative electrode, and the other end of the fast charging negative relay is connected with a fast charging negative interface.

Further, the discharging loop further comprises a main negative relay, one end of the main negative relay is connected with the negative electrode of the battery, and the other end of the main negative relay is connected with one end of the quick charging relay.

Further, the discharging loop further comprises a current sensor, one end of the current sensor is connected with the battery, and the other end of the current sensor is connected with the main negative relay.

Further, the device also comprises a positive electrode precursor joint, a positive electrode rear drive joint, a negative electrode precursor joint and a negative electrode rear drive joint; the positive electrode precursor joint and the positive electrode rear drive joint are connected with a node between the main positive relay and the quick charging positive relay; the negative electrode precursor joint and the negative electrode rear drive joint are connected with the nodes between the main negative relay and the quick charge negative relay.

Further, the circuit further comprises a first shell, and the exciting fuse, the main positive relay, the pre-charging resistor, the fast charging positive relay, the fast charging negative relay, the main negative relay and the current sensor are all located in the first shell.

Further, the battery also comprises a second housing, the first housing is positioned in the second housing, and the battery is positioned between the first housing and the second housing.

Further, the low-voltage communication module is arranged on the second shell.

Analysis shows that the utility model discloses a BDU high-voltage electric framework of a battery pack of a passenger car, which covers the high-voltage framework of most battery packs of the passenger car, reduces the development variety of the BDU and reduces the development cost of the BDU; the BDU is internally provided with an intelligent fuse, so that when a dangerous accident occurs to the automobile, the BDU can timely disconnect a power supply, and the probability of dangerous occurrence is reduced; the electric high-voltage framework can be compatible with a single-double motor scheme of a whole vehicle client and various quick-charging schemes, and has high practicability.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. Wherein:

FIG. 1 is a schematic diagram of an embodiment of the present utility model.

Reference numerals illustrate: 1. energizing the fuse; 2. a main fuse; 3. a main positive relay; 4. pre-charging a relay; 5. pre-charging a resistor; 6. charging a positive relay; 7. a fast charge negative relay; 8. a main negative relay; 9. a current sensor; 10. a battery, 11, a first housing; 12. a second housing; 13. a fast charging positive electrode interface; 14. a fast charging negative electrode interface; 15. a positive electrode rear drive joint; 16. a negative electrode rear-drive joint; 17. a positive electrode precursor joint; 18. a negative electrode precursor joint; 19. and a low-voltage communication module.

Detailed Description

The utility model will be described in detail below with reference to the drawings in connection with embodiments. The examples are provided by way of explanation of the utility model and not limitation of the utility model. Indeed, it will be apparent to those skilled in the art that modifications and variations can be made in the present utility model without departing from the scope or spirit of the utility model. For example, features illustrated or described as part of one embodiment can be used on another embodiment to yield still a further embodiment. Accordingly, it is intended that the present utility model encompass such modifications and variations as fall within the scope of the appended claims and their equivalents.

In the description of the present utility model, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. refer to the orientation or positional relationship based on that shown in the drawings, merely for convenience of description of the present utility model and do not require that the present utility model must be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. The terms "coupled," "connected," and "configured" as used herein are to be construed broadly and may be, for example, fixedly connected or detachably connected; can be directly connected or indirectly connected through an intermediate component; either a wired electrical connection, a radio connection or a wireless communication signal connection, the specific meaning of which terms will be understood by those of ordinary skill in the art as the case may be.

One or more examples of the utility model are illustrated in the accompanying drawings. The detailed description uses numerical and letter designations to refer to features in the drawings. Like or similar designations in the drawings and description have been used to refer to like or similar parts of the utility model. As used herein, the terms "first," "second," "third," and "fourth," etc. are used interchangeably to distinguish one component from another and are not intended to represent the location or importance of the individual components.

As shown in fig. 1, according to an embodiment of the present utility model, there is provided a passenger car battery 10 including a BDU high-voltage electric power architecture including: the discharging loop and the charging loop are connected in series; the discharging loop comprises a battery 10, a main positive relay 3, a pre-charging relay 4 and a pre-charging resistor 5, one end of the main positive relay 3 is connected with the positive pole of the battery 10, the other end of the main positive relay 3 is connected with one end of the charging loop, the pre-charging relay 4 and the pre-charging resistor 5 are connected in parallel with the main positive relay 3 after being connected in series, the main positive relay 3 is driven by a BMS to conduct and cut off a high-voltage loop, the pre-charging relay 4 and the pre-charging resistor 5 play a role of protecting a circuit, if the pre-charging relay 4 and the pre-charging resistor 5 are not in a protective circuit, the high-voltage system relay is suddenly closed at the moment of connecting the circuit due to capacitive load in the electric automobile power supply loop, the electric quantity of a capacitor is zero, the capacitor is equivalent to a short circuit according to the transient characteristic of the circuit, and the transient current of the loop resistor (including the internal resistance of the battery 10, the high-voltage line resistor, the contact resistance of each contact point, the internal resistance of a fuse and the like) is about tens of milliohm, the transient current of the high-voltage system becomes large, so that a large current of a large impact is generated, if the electric equipment is not in a protective circuit, the electric equipment is not in a full-charge loop is also can be completely damaged due to the fact that the electric pile is completely to the full-charge and the full-charge loop is completely-charged, and the full-charge is not in the protective circuit, and the full-charge of the utility model is damaged, and the electric equipment is also can be damaged.

Preferably, the discharging circuit further comprises a main fuse 2, one end of the main fuse 2 is connected with the positive electrode of the battery 10, the other end of the main fuse 2 is connected with one end of the main positive relay 3, and the main fuse 2 can effectively cut off the circuit when overload or short circuit occurs in the circuit, so that the battery 10 module is protected, and further larger loss is avoided.

Preferably, the discharge circuit further comprises an energizing fuse 1, the energizing fuse 1 being located between the main fuse 2 and the battery 10, one end of the energizing fuse 1 being connected to the positive pole of the battery 10, the other end of the energizing fuse 1 being connected to one end of the main fuse 2.

Preferably, the charging loop comprises a fast charging positive relay 6 and a fast charging negative relay 7, one end of the fast charging positive relay 6 is connected with the other end of the main positive relay 3, the other end of the fast charging positive relay 6 is connected with a fast charging positive interface 13, one end of the fast charging negative relay 7 is connected with the negative electrode of the battery 10, the other end of the fast charging negative relay 7 is connected with a fast charging negative interface 14, the implementation of fast charging in the current common battery 10 package structure comprises the following schemes, firstly, the fast charging positive relay 6 and the fast charging negative relay 7 are not arranged in the battery 10 package; the battery 10 is provided with a fast charging positive relay 6 and a fast charging positive and negative relay 7; the utility model realizes the compatibility of the three schemes by simultaneously arranging the fast charge positive relay 6 and the fast charge negative relay 7, and meanwhile, the whole vehicle has a single motor scheme and a double motor scheme commonly, so that the battery 10 is provided with two high-voltage discharge interfaces, and the two whole vehicle technical schemes can be compatible by arranging the fast charge positive interface 13 and the fast charge negative interface 14.

Preferably, the discharging loop further comprises a main negative relay 8, one end of the main negative relay 8 is connected with the negative electrode of the battery 10, the other end of the main negative relay 8 is connected with one end of the quick charging relay, and the main negative relay 8 and the main positive relay 3 have the same function and play roles in conducting and cutting off a circuit.

Preferably, the discharging circuit further comprises a current sensor 9, one end of the current sensor 9 is connected with the battery 10, the other end of the current sensor 9 is connected with the main negative relay 8, and the current sensor 9 is used for monitoring the current state of the battery 10 group so as to ensure the safety and performance of the battery 10 group. The current sensor 9 typically operates by inducing a current to generate a voltage signal.

Preferably, the positive electrode precursor joint 17, the positive electrode rear drive joint 15, the negative electrode precursor joint 18 and the negative electrode rear drive joint 16 are further included; the positive electrode precursor joint 17 and the positive electrode rear drive joint 15 are connected with the nodes between the main positive relay 3 and the quick charging positive relay 6; the negative electrode precursor joint 18 and the negative electrode rear drive joint 16 are connected with the nodes between the main negative relay 8 and the quick charge negative relay 7, and the positive electrode precursor joint 17, the positive electrode rear drive joint 15, the negative electrode precursor joint 18, the negative electrode rear drive joint 16, the quick charge positive electrode interface 13 and the quick charge negative electrode interface 14 are arranged on the second shell 12.

Preferably, the device further comprises a first housing 11, wherein the exciting fuse 1, the main fuse 2, the main positive relay 3, the pre-charging relay 4, the pre-charging resistor 5, the fast-charging positive relay 6, the fast-charging negative relay 7, the main negative relay 8 and the current sensor 9 are all positioned in the first housing 11, and the first housing 11 is a housing of the BDU, and the electronic device is separated from the external environment through the housing of the BDU.

Preferably, the battery pack further comprises a second housing 12, the first housing 11 is located in the second housing 12, the battery 10 is located between the first housing 11 and the second housing 12, the second housing 12 is a housing of the whole battery 10 pack, the electrode precursor joint, the positive electrode precursor joint 15, the negative electrode precursor joint 18, the negative electrode precursor joint 16, the fast charge positive electrode interface 13 and the fast charge negative electrode interface 14 are arranged on the second housing 12, so that a user can conveniently connect external devices, in fig. 1, B+ is the total positive electrode of the whole battery 10 pack module, B+ is the total negative electrode of the whole battery 10 pack module, FC+ is the positive electrode of the fast charge interface, FC-is the negative electrode of the fast charge interface, BD+ is the positive electrode of the rear drive interface, BD-is the negative electrode of the rear drive interface, FD+ is the positive electrode of the precursor interface, and FD+ is the negative electrode of the precursor interface.

Preferably, the vehicle further comprises a low-voltage communication module 19, the low-voltage communication module 19 is arranged on the second housing 12, and the low-voltage communication module 19 is used for vehicle communication.

From the above description, it can be seen that the present utility model covers the circuit architecture of most battery packs of passenger cars, reduces the types of BDU development, and reduces the cost of BDU development; the BDU is internally provided with an intelligent fuse, so that when a dangerous accident occurs to the automobile, the BDU can timely disconnect a power supply, and the probability of dangerous occurrence is reduced; the electric high-voltage framework can be compatible with a single-double motor scheme of a whole vehicle client and various quick-charging schemes, has high practicability and can be used for standard BDU development.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A passenger car battery pack BDU high voltage electrical architecture comprising:

a discharge loop and a charge loop, the discharge loop being in series with the charge loop;

the discharging circuit comprises a battery (10), a main positive relay (3), a pre-charging relay (4) and a pre-charging resistor (5), one end of the main positive relay (3) is connected with the positive electrode of the battery (10), the other end of the main positive relay (3) is connected with one end of the charging circuit, and the pre-charging relay (4) and the pre-charging resistor (5) are connected in series and then connected with the main positive relay (3) in parallel.

2. A high voltage power architecture of a battery pack BDU for a passenger car according to claim 1, characterized in that the discharge circuit further comprises a main fuse (2), one end of the main fuse (2) being connected to the positive pole of the battery (10), the other end of the main fuse (2) being connected to one end of the main positive relay (3).

3. A passenger car battery pack BDU high voltage electrical architecture according to claim 2 characterized in that the discharge circuit further comprises an excitation fuse (1), the excitation fuse (1) being located between the main fuse (2) and the battery (10), one end of the excitation fuse (1) being connected with the positive pole of the battery (10), the other end of the excitation fuse (1) being connected with one end of the main fuse (2).

4. A passenger car battery pack BDU high-voltage electrical architecture according to claim 3, characterized in that the charging loop comprises a fast charging positive relay (6) and a fast charging negative relay (7), one end of the fast charging positive relay (6) is connected with the other end of the main positive relay (3), the other end of the fast charging positive relay (6) is connected with a fast charging positive electrode interface (13), one end of the fast charging negative relay (7) is connected with the negative electrode of the battery (10), and the other end of the fast charging negative relay (7) is connected with a fast charging negative electrode interface (14).

5. A high voltage battery pack BDU structure for a passenger car according to claim 4 characterized in that the discharging circuit further comprises a main negative relay (8), one end of the main negative relay (8) is connected with the negative electrode of the battery (10), and the other end of the main negative relay (8) is connected with one end of the fast charge negative relay (7).

6. A passenger car battery pack BDU high-voltage electrical architecture according to claim 5 characterized in that the discharge loop further comprises a current sensor (9), one end of the current sensor (9) is connected to the battery (10), and the other end of the current sensor (9) is connected to the main negative relay (8).

7. A passenger car battery pack BDU high voltage electrical architecture according to claim 6, further comprising a positive precursor joint (17), a positive rear precursor joint (15), a negative precursor joint (18) and a negative rear precursor joint (16);

the positive electrode precursor joint (17) and the positive electrode rear drive joint (15) are connected with a node between the main positive relay (3) and the quick charge positive relay (6);

the negative electrode precursor joint (18) and the negative electrode rear drive joint (16) are connected with a node between the main negative relay (8) and the quick charge negative relay (7).

8. A passenger car battery pack BDU high-voltage electrical architecture according to claim 5, further comprising a first housing (11), wherein the excitation fuse (1), the main fuse (2), the main positive relay (3), the pre-charge relay (4), the pre-charge resistor (5), the fast-charge positive relay (6), the fast-charge negative relay (7), the main negative relay (8) and the current sensor (9) are all located within the first housing (11).

9. A passenger car battery pack BDU high voltage electrical architecture according to claim 8 further comprising a second housing (12), the first housing (11) being located within the second housing (12), the battery (10) being located between the first housing (11) and the second housing (12).

10. A high voltage power architecture for a battery pack BDU of a passenger vehicle according to claim 9, further comprising a low voltage communication module (19), said low voltage communication module (19) being provided on said second housing (12).