Multi-branch high-voltage box and new energy vehicle

Abstract

The utility model provides a multi-branch high-voltage box, which comprises a battery pack positive electrode interface and a battery pack negative electrode interface, the battery pack positive electrode interface can be connected with the positive electrode of a battery pack, and the battery pack negative electrode interface can be connected with the negative electrode of the battery pack; according to the multi-branch high-voltage box and the new energy vehicle, the electrical architecture of a multi-branch battery system is optimized, the parallel loop at the battery end is simplified, the power consumption of the battery system is reduced, the power consumption of the battery system is reduced, the power consumption of the battery system is reduced, and the power consumption of the battery system is reduced. Under the condition that normal functions of the high-voltage box are guaranteed, the number of manual maintenance switches in the high-voltage box of the system is reduced, and under the condition that original functions are not affected, the material consumption and the assembly difficulty of the system are reduced, so that the purpose of reducing material cost and labor cost is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy field especially relates to a multi-branch high voltage box and new energy vehicle. BACKGROUND

[0002] At present, in the field of new energy heavy load engineering machinery, due to the demand of load and endurance, the demand of multi-branch battery system will exist, by increasing branch parallel connection, increasing the electric quantity to increase the endurance mileage, and the vehicle end will also be designed with double motor and double gun charging to improve the driving ability and charging efficiency of the whole vehicle. The high voltage box arrangement mode is to insert a manual maintenance switch (MSD) in series on each branch to achieve the purpose of safe breaking protection, but when the number of branches is large, the amount of MSD is large, the material cost is high, and the manual assembly cost is also increased accordingly. SUMMARY

[0003] The utility model discloses a multi-branch high voltage box and new energy vehicle, which realizes the reduction of the amount of MSD in the system high voltage box.

[0004] In order to achieve the above purpose, the utility model provides the following technical scheme: a multi-branch high voltage box, comprising: a battery pack positive electrode interface and a battery pack negative electrode interface, the battery pack positive electrode interface can be connected with the positive electrode of the battery pack, and the battery pack negative electrode interface can be connected with the negative electrode of the battery pack;At least two charge-discharge interfaces, the positive electrode of each charge-discharge interface is connected with all the battery pack positive electrode interfaces through a manual maintenance switch.

[0005] Further, the charge-discharge interface includes a charging positive electrode interface and a discharging positive electrode interface, the discharging positive electrode interface is connected with the manual maintenance switch, and the charging positive electrode interface is connected with the manual maintenance switch through a first relay.

[0006] Further, the charge-discharge interface further includes a charging negative electrode interface and a discharging negative electrode interface, and the charging negative electrode interface and the discharging negative electrode interface are connected with the battery pack negative electrode interface.

[0007] Further, the high voltage box further includes a TMS interface, the TMS interface can be connected with a thermal management system, the positive electrode of the TMS interface is connected with the battery pack positive electrode interface, the charging positive electrode interface and the discharging positive electrode interface, and the negative electrode of the TMS interface is connected with the battery pack negative electrode interface, the charging negative electrode interface and the discharging negative electrode interface.

[0008] Further, the charging negative electrode interface is connected with the battery pack negative electrode interface through a second relay, and the discharging negative electrode interface is connected with the battery pack negative electrode interface through a third relay.

[0009] Further, the positive pole of the TMS interface is connected with the battery pack positive pole interface through the fourth relay.

[0010] Further, a fuse is arranged between the battery pack positive pole interface and the fourth relay.

[0011] Further, the number of the battery pack positive pole interface and the battery pack negative pole interface is multiple, and each battery pack positive pole interface corresponds to one battery pack negative pole interface.

[0012] Further, the high-voltage box further comprises a current sensor, the current sensor is connected with the battery pack negative pole interface, and the current sensor can detect the input current size of the battery pack.

[0013] In another aspect, a new energy vehicle is provided, and the new energy vehicle applies the high-voltage box as described above.

[0014] It can be analyzed that the utility model discloses a kind of multi-branch high-voltage box and new energy vehicle, and the application is simplified battery end and loop by the electrical architecture optimization of multi-branch battery system, under the guarantee of the normal function of high-voltage box, the number of manual maintenance switch in system high-voltage box is reduced, under the condition of not affecting original function, system material consumption and assembly difficulty are reduced, to reach the purpose of reducing material cost and labor cost. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings accompanying the specification provide further understanding of the present application, and the illustrative embodiments of the present application and the description thereof serve to explain the present application, and do not constitute improper limitation on the present application. Among them:

[0016] Figure 1 The structural schematic diagram of an embodiment of the utility model.

[0017] Explanation of reference numerals: 1, battery pack positive pole interface; 2, manual maintenance switch; 3, charging positive pole interface; 4, discharging positive pole interface; 5, first relay; 6, fourth relay; 7, fuse; 8, battery pack negative pole interface; 9, charging negative pole interface; 10, discharging negative pole interface; 11, second relay; 12, third relay; 13, TMS interface; 14, current sensor; 15, shell. DETAILED DESCRIPTION

[0018] The utility model will be described below in detail with reference to the drawings and in conjunction with embodiments. Each example is provided by way of illustration of the utility model and does not limit the utility model. In fact, those skilled in the art will clearly understand that modifications and variations can be made in the utility model without departing from the scope or spirit of the utility model. For example, features shown as or described as part of one embodiment can be used in another embodiment to produce yet another embodiment. Therefore, it is expected that the utility model includes such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0019] In the description of the utility model, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and does not require the utility model to be necessarily constructed and operated in a particular orientation, so it cannot be understood as a limitation on the utility model. The terms "connected", "connected", "provided" used in the utility model should be understood broadly, for example, it can be fixed connection, can also be detachable connection; it can be directly connected, or indirectly connected through an intermediate part; it can be wired electrical connection, wireless electrical connection, or wireless communication signal connection, and those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0020] One or more examples of the utility model are shown in the accompanying drawings. The detailed description uses numerical and letter marks to refer to features in the drawings. Similar or like marks in the drawings and description have been used to refer to similar or like parts of the utility model. As used herein, the words "first", "second", "third", and "fourth" are used interchangeably to distinguish one member from another, and are not intended to denote the position or importance of the individual members.

[0021] As Figure 1 As shown in the utility model, according to the embodiment of the utility model, a multi-branch high-voltage box is provided, comprising: a battery pack positive terminal 1 and a battery pack negative terminal 8, the battery pack positive terminal 1 can be connected with the positive terminal of the battery pack, the battery pack negative terminal 8 can be connected with the negative terminal of the battery pack, the number of the battery pack positive terminal 1 and the battery pack negative terminal 8 is multiple, each battery pack positive terminal 1 corresponds to one battery pack negative terminal 8; at least two charge-discharge interfaces, the positive terminal of each charge-discharge interface is connected with all battery pack positive terminals 1 through a manual maintenance switch 2.

[0022] Specifically, the battery pack positive electrode interface 1 and the battery pack negative electrode interface 8 are arranged on the outer wall of the outer shell 15 of the high-voltage box, and the battery pack is connected with the high-voltage box through the battery pack positive electrode interface 1 and the battery pack negative electrode interface 8 to provide power input for the high-voltage box. The charging and discharging interface is also arranged on the outer wall of the outer shell 15, and the high-voltage box is connected with the external power supply or power consumption equipment through the charging and discharging interface.

[0023] Specifically, the application significantly reduces the number of manual maintenance switches 2 (MSD) by optimizing the electrical architecture, so that the total number of manual maintenance switches 2 matches the two charging and discharging interfaces.

[0024] The battery pack is composed of multiple parallel branches, and each branch independently configures a battery module to meet the high power demand of new energy heavy machinery. The positive electrode of at least two charging and discharging interfaces is connected with the positive electrode of all battery packs through an independent manual maintenance switch 2 (MSD). By centrally arranging the MSD in the loop of each charging and discharging interface, the MSD is replaced by the conventional independent installation of the MSD of each battery pack positive electrode interface 1. In general vehicle use, the number of charging and discharging interfaces of the high-voltage box is 2, so that the number of MSDs in the high-voltage box is reduced to 2, significantly reducing the material and assembly cost.

[0025] Specifically, in actual application, the operator can quickly operate the MSD through the external handle to realize emergency breaking of the system, ensuring safety and maintenance convenience.

[0026] The charging and discharging interface includes a charging positive electrode interface 3 and a discharging positive electrode interface 4, and the discharging positive electrode interface 4 is connected with the manual maintenance switch 2, and the charging positive electrode interface 3 is connected with the manual maintenance switch 2 through the first relay 5.

[0027] Specifically, the charging and discharging interface is further divided into a charging positive electrode interface 3 and a discharging positive electrode interface 4, which are independently designed to avoid interference between the charging and discharging circuits. The discharging positive electrode interface 4 is directly connected with the output end of the manual maintenance switch 2, supporting the instantaneous high current demand of the vehicle driving system. The charging positive electrode interface 3 is connected with the manual maintenance switch 2 through the first relay 5. In the charging circuit, the first relay 5 is usually controlled by the vehicle controller and is closed only in the charging mode, ensuring the physical isolation of the charging and discharging circuits. The application covers the charging and discharging double-loop protection through a single manual maintenance switch 2, avoiding the redundancy problem of configuring an independent manual maintenance switch 2 for each branch in the traditional scheme.

[0028] The charging and discharging interface also includes a charging negative electrode interface 9 and a discharging negative electrode interface 10, and the charging negative electrode interface 9 and the discharging negative electrode interface 10 are connected with the battery pack negative electrode interface 8.

[0029] Specifically, the negative part of the charging and discharging interface includes a charging negative electrode interface 9 and a discharging negative electrode interface 10, which can be directly connected to the battery pack common negative electrode interface through a low-impedance copper bar.

[0030] The high-voltage box further comprises a TMS interface 13, which is capable of being connected with a thermal management system (TMS), and a positive pole of the TMS interface 13 is connected with the battery pack positive pole interface 1, the charging positive pole interface 3 and the discharging positive pole interface 4, and a negative pole of the TMS interface 13 is connected with the battery pack negative pole interface 8, the charging negative pole interface 9 and the discharging negative pole interface 10.

[0031] The positive pole of the TMS interface 13 is connected with the battery pack positive pole interface 1 through the fourth relay 6.

[0032] Specifically, the control logic of the fourth relay 6 is triggered by the BMS (Battery Management System) in real time after monitoring the battery temperature.

[0033] The battery pack positive pole interface 1 is further provided with a fuse 7 between the battery pack positive pole interface 1 and the fourth relay 6.

[0034] Specifically, the fuse 7 is arranged between the battery pack positive pole interface 1 and the fourth relay 6, and a high breaking capacity type fuse is usually selected. The fuse 7 is used for quickly fusing and cutting off the fault current when overcurrent or short circuit occurs in the TMS loop, so as to protect the thermal management system and the relay from being damaged. The state of the fuse 7 can be fed back to the BMS through the built-in micro switch, so as to realize remote alarm of the fault and improve the maintainability of the system.

[0035] The charging negative pole interface 9 is connected with the battery pack negative pole interface 8 through the second relay 11, and the discharging negative pole interface 10 is connected with the battery pack negative pole interface 8 through the third relay 12.

[0036] The high-voltage box further comprises a current sensor 14, which is connected with the battery pack negative pole interface 8 and is capable of detecting the current size of the battery pack.

[0037] Specifically, the high-voltage box is provided with the current sensor 14, which is used for monitoring the total current of the battery pack in real time. The BMS can realize the branch equalization state diagnosis by comparing the difference between the branch currents and the total current. The sensor shell is usually shielded, and the anti-electromagnetic interference capacity reaches 100 dB, so as to ensure the accuracy of data acquisition.

[0038] The utility model further discloses a new energy vehicle, and the new energy vehicle applies the high-voltage box as above.

[0039] From the above description, it can be seen that the above-mentioned embodiments of the utility model realize the following technical effects: the application simplifies the battery end return circuit, integrates the whole vehicle end charging and discharging circuit, reduces the number of manual maintenance switches in the system high-pressure box, reduces the system material consumption and assembly difficulty without affecting the original function, so as to achieve the purpose of reducing material cost and labor cost.

[0040] The above only describes the preferred embodiments of the utility model and is not used to limit the utility model, and the utility model can have various changes and variations for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A multi-leg high pressure tank, characterized by, The high-voltage box comprises: a battery pack positive electrode interface and a battery pack negative electrode interface, the battery pack positive electrode interface being capable of being connected with a positive electrode of a battery pack, and the battery pack negative electrode interface being capable of being connected with a negative electrode of the battery pack; at least two charge-discharge interfaces, a positive electrode of each of the charge-discharge interfaces being connected with all the battery pack positive electrode interfaces through a manual maintenance switch.

2. The multi-leg high pressure tank of claim 1, wherein, The charge-discharge interface comprises a charging positive electrode interface and a discharging positive electrode interface, the discharging positive electrode interface being connected with the manual maintenance switch, and the charging positive electrode interface being connected with the manual maintenance switch through a first relay.

3. A multi-branch high-pressure tank according to claim 2, characterized in that The charge-discharge interface further comprises a charging negative electrode interface and a discharging negative electrode interface, the charging negative electrode interface and the discharging negative electrode interface being connected with the battery pack negative electrode interface.

4. The multi-leg high pressure tank of claim 1, wherein, The high-voltage box further comprises a TMS interface, the TMS interface being capable of being connected with a thermal management system, a positive electrode of the TMS interface being connected with the battery pack positive electrode interface, the charging positive electrode interface and the discharging positive electrode interface, and a negative electrode of the TMS interface being connected with the battery pack negative electrode interface, the charging negative electrode interface and the discharging negative electrode interface.

5. The multi-leg high pressure tank of claim 3, wherein, The charging negative electrode interface is connected with the battery pack negative electrode interface through a second relay, and the discharging negative electrode interface is connected with the battery pack negative electrode interface through a third relay.

6. A multi-branch high-pressure tank according to claim 4, characterized in that The positive electrode of the TMS interface is connected with the battery pack positive electrode interface through a fourth relay.

7. A multi-branch high-pressure tank according to claim 6, characterized in that A fuse is further arranged between the battery pack positive electrode interface and the fourth relay.

8. The multi-leg high pressure box of claim 3, wherein, The number of the battery pack positive electrode interfaces and the battery pack negative electrode interfaces is plural, and each of the battery pack positive electrode interfaces corresponds to one of the battery pack negative electrode interfaces.

9. The multi-leg high pressure box of claim 3, wherein, The high-voltage box further comprises a current sensor, the current sensor being connected with the battery pack negative electrode interface, and the current sensor being capable of detecting the current of the battery pack.

10. A new energy vehicle, characterized in that, The new energy vehicle applies the high-voltage box according to any one of claims 1 to 9.

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