CN215528646U

CN215528646U - High voltage distribution box, battery package and vehicle

Info

Publication number: CN215528646U
Application number: CN202121077816.6U
Authority: CN
Inventors: 华靖; 曹泽雾
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2022-01-14
Anticipated expiration: 2031-05-19

Abstract

The utility model relates to the technical field of batteries, and particularly discloses a high-voltage distribution box, a battery pack and a vehicle. The high-voltage distribution box comprises a positive circuit, a negative circuit, a heating circuit, a pre-charging circuit, a BMS control module, a DC/DC converter and an emergency power switch. An output of the DC/DC converter is electrically connected to a wake-up signal input of the BMS control module and is configured to provide a wake-up signal to the BMS control module. The emergency power switch is electrically connected with the input end of the DC/DC converter and is used for controlling the DC/DC converter to be powered off or powered on. The emergency power switch is additionally arranged at the input end of the DC/DC converter, so that the power failure between the DC/DC converter and the battery membrane group is realized, the static power consumption of the DC/DC converter is eliminated, and the over-discharge of the battery module is avoided.

Description

High voltage distribution box, battery package and vehicle

Technical Field

The utility model belongs to the technical field of batteries, and particularly relates to a high-voltage distribution box, a battery pack and a vehicle.

Background

In the power management system of the new energy engineering mechanical vehicle, the battery module is high-voltage electricity, and the battery module is electrically connected with the high-voltage distribution box, so that the high-voltage distribution box can safely distribute the high-voltage electricity of the battery module, and the safety of the main driving system and the auxiliary driving system is protected. The high-voltage distribution box is internally integrated with an electric switch such as a relay, and the high-voltage loop is connected or disconnected according to the control requirements of normal power on and off.

Since the BMS control module in the high voltage distribution box needs the 12V power wake-up signal for wake-up by discharging, a DC/DC converter is built in the high voltage distribution box for voltage conversion to provide the 12V power signal.

When the electric quantity of the battery is small, or the vehicle is not used for a long time or in the long-distance transportation process, the DC/DC converter cannot be in a self-dormancy state, the input end of the DC/DC converter is electrified all the time, no-load power consumption exists, the electric quantity of the battery module is over-discharged, the relay arranged in the box body cannot be disconnected, and the control can be realized only through the operation of an external manual switch.

Therefore, a high voltage distribution box, a battery pack, and a vehicle are required to solve the above problems.

SUMMERY OF THE UTILITY MODEL

One objective of the present invention is to provide a high voltage distribution box to cut off the power supply at the input end of a DC/DC converter, eliminate the static power consumption of the DC/DC converter, and avoid the over-discharge of a battery module.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a high-voltage distribution box, includes positive pole circuit, negative pole circuit, heating circuit and pre-charge circuit, high-voltage distribution box still includes:

a BMS control module;

a DC/DC converter having an output electrically connected to a wake-up signal input of a BMS control module and configured to provide a wake-up signal to the BMS control module;

the emergency power switch is electrically connected with the input end of the DC/DC converter and used for controlling the DC/DC converter to be powered off or powered on.

Further, an operation button of the emergency power switch is exposed outside the high-voltage distribution box.

Further, the emergency power switch is arranged opposite to the DC/DC converter.

Further, all install the connector on two relative first lateral walls that set up of high tension switchgear along its first direction, emergency power source switch install in high tension switchgear is along on its second lateral wall of second direction.

Further, the second side wall is provided with a mounting hole, and the emergency power switch is in threaded connection with the mounting hole.

Further, high tension switchgear still includes that the cover is located emergency power source switch's safety cover, the one end of safety cover articulate in on the second lateral wall.

Further, a seal is provided between the emergency power switch and the second side wall to provide the emergency power switch with a waterproof rating of IP 67.

Further, the emergency power switch is a normally closed switch.

Another objective of the present invention is to provide a battery pack to cut off the power supply at the input end of the DC/DC converter, so as to eliminate the static power consumption of the DC/DC converter and avoid the over-discharge of the battery module.

the battery pack comprises a battery module and the high-voltage distribution box, wherein the battery module is electrically connected with the high-voltage distribution box.

It is still another object of the present invention to provide a vehicle for cutting off power at an input terminal of a DC/DC converter, eliminating static power consumption of the DC/DC converter, and preventing over-discharge of a battery module.

a vehicle comprises the battery pack.

The utility model has the beneficial effects that:

according to the high-voltage distribution box, the battery pack and the vehicle, the emergency power switch is additionally arranged at the input end of the DC/DC converter, so that the power failure between the DC/DC converter and the battery membrane group is realized, the static power consumption of the DC/DC converter is eliminated, and the over-discharge of the battery module is avoided.

Drawings

Fig. 1 is a schematic structural view of a high voltage distribution box according to an embodiment of the present invention;

fig. 2 is an exploded view of a high voltage distribution box according to an embodiment of the present invention.

The component names and designations in the drawings are as follows:

1. a BMS control module; 2. a DC/DC converter; 3. an emergency power switch; 4. a connector assembly; 5. a box body; 6. an upper cover; 7. an electrical component; 8. and (4) a bracket.

Detailed Description

In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.

The embodiment discloses a vehicle, which can be an engineering machinery vehicle, and uses a lithium battery as a power source.

Specifically, this vehicle includes the battery package, and the battery package includes battery module and high voltage distribution box, and high voltage distribution box includes box 5, upper cover 6 and electrical component 7. The electric element 7 mainly comprises a main relay, a main fuse, a shunt, a heating relay, a pre-charging set and the like, and the electric element 7 is installed in the box body 5 of the high-voltage distribution box through a support 8 and can form a positive circuit, a negative circuit, a heating circuit and a pre-charging circuit. The positive circuit comprises a main relay and a main fuse which are connected in series, the negative circuit comprises a shunt, the pre-charging circuit comprises a pre-charging relay and a pre-charging resistor which are connected in series, the pre-charging circuit is connected with the main relay in parallel, and the heating circuit comprises a heating relay. Since the high-voltage distribution box is a mature product in the field, detailed description of the specific structure and circuit distribution is omitted.

In addition, still have BMS control module 1 and DC/DC converter 2 in the high voltage distribution box, BMS control module 1 is used for managing and controlling the operating condition of battery module. Since the BMS control module 1 requires a 12V power wake-up signal for wake-up by discharging, the high voltage distribution box body 5 is further built with a DC/DC converter 2 for voltage conversion, and the DC/DC converter 2 converts the 48V voltage of the battery module into 12V to provide the BMS control module 1 with a matched power wake-up signal.

Because the DC/DC converter 2 cannot be in a self-sleep state and the input end of the DC/DC converter is always electrified, no-load power consumption exists, and the electric quantity of the battery module is over-discharged. To solve this problem, as shown in fig. 1 and 2, the present embodiment further discloses a high-voltage distribution box including the positive electrode circuit, the negative electrode circuit, the heating circuit, the precharge circuit, the BMS control module 1, and the DC/DC converter 2 described above, and further including an emergency power switch 3 for controlling the DC/DC converter 2 to be powered off or on.

Specifically, the output terminal of the DC/DC converter 2 is electrically connected to the wake-up signal input terminal of the BMS control module 1 for providing the wake-up signal to the BMS control module 1. The emergency power switch 3 is electrically connected to an input terminal of the DC/DC converter 2.

The emergency power switch 3 is additionally arranged at the input end of the DC/DC converter 2, so that the power failure between the DC/DC converter 2 and the battery module is realized, the static power consumption of the DC/DC converter 2 is eliminated, and the over-discharge of the battery module is avoided.

The emergency power switch 3 can be a purchased part, and cost is saved. The operating button of the emergency power switch 3 is exposed outside the high-voltage distribution box, so that the pressing operation of an operator is facilitated, and the emergency power switch has good operability. For installing emergency power switch 3 in the cockpit of vehicle, the risk of operating personnel maloperation has been eliminated to the high pressure of this embodiment join in marriage single case, is favorable to improving the security that the vehicle travel. Meanwhile, the emergency power switch 3 is arranged on the high-voltage distribution box, the side wall space of the high-voltage distribution box is reasonably utilized, the space utilization rate of the high-voltage distribution box is improved, and processing such as opening in a vehicle cab is not needed.

Preferably, the emergency power switch 3 is arranged opposite to the DC/DC converter 2, so as to avoid disorder of wiring in the high-voltage distribution box due to the length of the wiring harness between the emergency power switch and the DC/DC converter.

The emergency power switch 3 of this embodiment is a normally closed switch. When the emergency power switch 3 is not operated, the input terminal of the DC/DC converter 2 is always kept in a charged state. When long-time storage or transportation need be carried out, press emergency power switch 3's operating button, can make DC/DC converter 2 lose the power, avoid battery module to put excessively.

Continuing with fig. 1 and 2, connectors 4 are mounted on two oppositely disposed first side walls of the high-voltage distribution box along a first direction thereof, and the emergency power switch 3 is mounted on a second side wall of the high-voltage distribution box along a second direction thereof.

The high-voltage distribution box of this embodiment is a rectangular box body, and includes two first lateral walls and a continuous second lateral wall, and wherein two first lateral walls set up along first direction (the length direction of box 5) relatively, and two second lateral walls set up along second direction (the width direction of box 5) relatively. The number of the connectors 4 is multiple, and the types are different, and the connectors are respectively used for a charging switching port, a communication switching port, a heating switching port and the like. Multiple connector 4 is installed on two first lateral walls, and emergency power switch 3 and a plurality of connector 4 are installed respectively on the lateral wall of difference, make things convenient for emergency power switch 3's wiring and installation. Meanwhile, the misoperation of the emergency power switch 3 in the wiring process of the connector 4 is avoided.

Specifically, the second side wall of the high-voltage distribution box is provided with a mounting hole (not shown in the figure), and the emergency power switch 3 is in threaded connection with the mounting hole. Specifically, the mounting hole is the internal thread hole, and the external screw thread of emergency power switch 3 self cooperates with the mounting hole for emergency power switch 3 simple to operate, swift.

Preferably, the high-voltage distribution box further comprises a protective cover (not shown) covering the emergency power switch 3, one end of the protective cover being hinged to the second side wall. Specifically, the one end of safety cover passes through the articulated shaft rotatable setting on the second lateral wall, and emergency power switch 3's maloperation can be avoided to this safety cover, has waterproof, dirt-proof function simultaneously. When the emergency power switch 3 needs to be operated, the protective cover is only opened.

In order to ensure that the emergency power switch 3 reaches the IP67 waterproof grade to satisfy the operating condition, a sealing member is provided between the emergency power switch 3 and the second side wall to improve the sealing effect between the emergency power switch 3 and the second side wall of the box body 5.

In particular, the seal may be a sealing ring or a sealing gasket. Of course, the emergency power switch 3 and the second side wall may be glued to improve the connection strength and the sealing effect therebetween.

The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but rather is susceptible to various changes and modifications without departing from the spirit and scope of the utility model, which changes and modifications are within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a high-voltage distribution box, includes positive pole circuit, negative pole circuit, heating circuit and pre-charge circuit, its characterized in that, high-voltage distribution box still includes:

a BMS control module (1);

a DC/DC converter (2), an output of the DC/DC converter (2) being electrically connected with a wake-up signal input of a BMS control module (1) and configured to provide a wake-up signal to the BMS control module (1);

an emergency power switch (3), wherein the emergency power switch (3) is electrically connected with the input end of the DC/DC converter (2) and is used for controlling the DC/DC converter (2) to be powered off or powered on.

2. The high-voltage distribution box according to claim 1, characterized in that the operating button of said emergency power switch (3) is exposed to the outside of said high-voltage distribution box.

3. The high voltage distribution box according to claim 1, characterized in that said emergency power switch (3) is arranged directly opposite said DC/DC converter (2).

4. The high voltage distribution box according to claim 1, wherein said high voltage distribution box is provided with connectors (4) on two oppositely arranged first side walls in a first direction of said high voltage distribution box, and said emergency power switch (3) is provided on a second side wall in a second direction of said high voltage distribution box.

5. The high voltage distribution box according to claim 4, characterized in that said second side wall is provided with mounting holes, said emergency power switch (3) being screwed to said mounting holes.

6. The high-voltage distribution box according to claim 4, further comprising a protective cover covering said emergency power switch (3), said protective cover being hinged at one end to said second side wall.

7. The high voltage distribution cubicle according to claim 4, characterized in that there is a seal between said emergency power switch (3) and said second side wall to bring said emergency power switch (3) to the IP67 waterproof class.

8. The high voltage distribution cubicle according to any of the claims 1 to 6, characterized in that said emergency power switch (3) is a normally closed switch.

9. A battery pack comprising a battery module and the hv power distribution box of any of claims 1-8, the battery module being electrically connected to the hv power distribution box.

10. A vehicle characterized by comprising the battery pack according to claim 9.