Battery pack and agricultural machine

Abstract

The battery pack comprises a shell, a battery module, a high-voltage assembly, an insulating cover and an MSD switch, the shell is provided with a cavity, the battery module is arranged in the cavity, the high-voltage assembly is arranged in the cavity, the high-voltage assembly is connected to the battery module, the high-voltage assembly comprises a copper bar, and the copper bar is arranged in the cavity. A cavity is formed in the shell, at least part of the insulation cover is located in the cavity, the insulation cover is connected to the shell, the insulation cover is provided with an isolation cavity, an MSD switch is installed on the shell and / or the insulation cover, at least part of the MSD switch extends into the isolation cavity, and a copper bar extends into the isolation cavity and is connected to the MSD switch. According to the embodiment of the invention, the connection part of the copper bar and the MSD switch is located in the insulating cover, the insulating cover plays a role in insulating isolation and heat insulation of the connection part of the copper bar and the MSD switch, the safety is improved, and the insulating cover also plays a role in enhancing the strength of the connection structure of the copper bar and the MSD switch.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery pack and agricultural machinery. BACKGROUND

[0002] In the related art, the battery system design in the field of heavy trucks, engineering machinery and agricultural machinery adopts a split layout, that is, a high-voltage power distribution unit (high-voltage box) is installed separately from the battery pack, and the electrical control function is realized through a wire harness connection. Although this design is convenient for maintenance, it occupies a large space and is difficult to meet the stringent requirements of agricultural machinery for compactness, lightweight and environmental adaptability. In recent years, with the accelerated application of new energy technology in the field of agricultural machinery, the demand for integration and compactness of electric agricultural machinery for power battery systems is significantly higher than that in the field of traditional heavy trucks and engineering machinery.

[0003] For example, the invention patent with application number 202410201848.4 provides a battery box, which includes a frame body, a battery pack and a high-voltage box. The battery pack is arranged at the middle position of the frame body, and the high-voltage box is arranged below the battery pack on the frame body. There is no direct connection relationship between the battery pack and the high-voltage box, and the two are connected through a cable. The entire battery box has a large volume. For another example, the utility model patent with application number 202420338475.0 provides an energy storage system, which includes a frame shell, a battery pack and a high-voltage box. The battery pack and the high-voltage box each have an independent shell, and the high-voltage box and the battery pack are located inside the frame shell. The two are connected through a cable. An MSD switch needs to be separately arranged on the high-voltage box for the purpose of facilitating maintenance by disconnecting the high-voltage circuit.

[0004] There are also some battery packs that are integrated with high-voltage boxes, that is, the high-voltage components in the high-voltage box and the battery modules are arranged in the same box. The copper bars and the MSD switch of the high-voltage components are connected inside the box. The copper bars are usually connected to the MSD switch through bolts. If the connection part is close to or in contact with the upper cover of the box, insulation failure is likely to occur. The end of the copper bar at the connection part is prone to overheating and ablation, and is likely to form an electrical gap and generate an electric arc, which may cause an electrical short circuit. Without isolation protection structure, it is easy to cause equipment damage and even fire accidents.

[0005] Therefore, the utility model is proposed. UTILITY MODEL CONTENT

[0006] To solve one of the above technical problems, the utility model provides a battery pack and agricultural machinery.

[0007] The application adopts the following technical solutions:

[0008] On the one hand, the application embodiment provides a battery pack, which comprises:

[0009] a shell having a cavity;

[0010] a battery module disposed in the cavity;

[0011] a high-voltage assembly disposed in the cavity, the high-voltage assembly being connected to the battery module, the high-voltage assembly comprising a copper bar;

[0012] an insulating cover at least partially located in the cavity, the insulating cover being connected to the shell, the insulating cover having an isolation cavity;

[0013] an MSD switch mounted on the shell and / or the insulating cover, the MSD switch extending at least partially into the isolation cavity;

[0014] the copper bar extending into the isolation cavity and being connected to the MSD switch.

[0015] Optionally, the insulating cover is provided with a lead port communicating the isolation cavity and the cavity;

[0016] the copper bar extending into the isolation cavity through the lead port to connect the MSD switch.

[0017] Optionally, the insulating cover has an end wall and a peripheral side wall provided around the periphery of the end wall;

[0018] the end wall and the inner wall of the shell have a gap, and the peripheral side wall extends from the end wall to the outside of the shell;

[0019] the lead port is provided on the peripheral side wall.

[0020] Optionally, the peripheral side wall is provided with a plurality of holes, each of the holes being provided with a baffle, the baffle being connected to the peripheral side wall through a plurality of connecting portions, each of the connecting portions being arranged in sequence and spaced apart along the periphery of the baffle;

[0021] in a state where the baffle is separated from the peripheral side wall, the hole is open, forming a lead port communicating the cavity and the isolation cavity.

[0022] Optionally, the thickness of the baffle is less than the thickness of the peripheral side wall.

[0023] Optionally, the peripheral side wall has a plurality of side walls, each of the side walls being connected in sequence, and adjacent side walls having an included angle;

[0024] two lead ports are provided on one of the side walls;

[0025] two copper bars of the high-voltage assembly extend into the isolation cavity through the lead ports to connect the MSD switch.

[0026] Optionally, the peripheral side wall is provided with a partition rib.

[0027] The partitioning rib is located between two adjacent lead ports.

[0028] Optionally, the end wall is provided with a heat dissipation hole communicating with the isolation cavity.

[0029] Optionally, a flange part is arranged on the peripheral side edge of the insulating cover.

[0030] The insulating cover is arranged through the shell, and the flange part is attached to the outer surface of the shell.

[0031] The flange part is connected to the shell by a fastener.

[0032] Optionally, the insulating cover has an external shell exposed to the outside of the shell, the external shell has an external cavity, the external cavity communicates with the isolation cavity, and the MSD switch is at least partially structured to be accommodated in the external cavity.

[0033] In another aspect, the application provides an agricultural machine, comprising: a vehicle body and a battery pack, a walking mechanism is arranged on the vehicle body, and the battery pack is arranged on the vehicle body and electrically connected to the walking mechanism.

[0034] By adopting the above technical scheme, the application has the following beneficial effects:

[0035] In the embodiment of the application, the connection part of the copper bar and the MSD switch is located in the internal part of the insulating cover, the insulating cover plays a role of insulating and isolating the connection part of the copper bar and the MSD switch and heat insulation, and the safety is improved, and the insulating cover also plays a role of enhancing the strength of the connection structure of the copper bar and the MSD switch.

[0036] The specific implementation of the application will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0037] The accompanying drawings are part of the application and serve to provide a further understanding of the application, and the schematic embodiments of the application and the description thereof serve to explain the application, but do not constitute an improper limitation on the application. Obviously, the drawings described below are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings. In the drawings:

[0038] Figure 1 Fig. 1 shows a schematic diagram of the internal structure of the battery pack provided by the embodiment of the application;

[0039] Figure 2 Fig. 3 shows a schematic diagram of the cooperation structure of the internal shell, the insulating cover and the copper bar of the battery pack provided by the embodiment of the application;

[0040] Figure 3 Fig. 1 shows a schematic diagram of a partial structure inside a battery pack according to an embodiment of the present disclosure;

[0041] Figure 4 Fig. 2 shows a schematic diagram of a MSD switch and an insulating cover cooperation structure of a battery pack according to an embodiment of the present disclosure;

[0042] Figure 5 Fig. 3 shows a schematic diagram of a structure of an insulating cover on a battery pack according to an embodiment of the present disclosure;

[0043] Figure 6 Fig. 4 shows a schematic diagram of a cooperation structure of a MSD, an insulating cover and a copper bar on a battery pack according to an embodiment of the present disclosure;

[0044] Figure 7 Fig. 5 shows a schematic diagram of a structure of a battery pack arranged on an agricultural machine according to an embodiment of the present disclosure.

[0045] In the figures: 100, battery pack; 1, outer shell; 2, battery module; 3, copper bar; 4, insulating cover; 41, end wall; 411, heat dissipation hole; 42, circumferential wall; 420, lead port; 421, blocking piece; 422, separation rib; 43, outer shell; 431, flange part; 5, MSD switch; 6, fastener; 200, vehicle body; 210, hood.

[0046] It should be noted that the drawings and the written description are not intended to limit the scope of the present disclosure in any way, but to illustrate the concept of the present disclosure to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical scheme and advantages of the embodiments of the present disclosure clearer, the technical scheme in the embodiments will be described clearly and completely below with reference to the drawings of the embodiments of the present disclosure. The following embodiments are used to illustrate the present disclosure, but not to limit the scope of the present disclosure.

[0048] In the description of the present disclosure, it should be noted that the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the devices or components referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0049] In the description of the utility model, it is necessary to explain that, unless there are explicit provisions and limitations, the terms "mounting", "connection" should be understood broadly, for example, it can be fixed connection, can also be detachable connection, or integrally connected, can be mechanical connection, can also be electrical connection, can be directly connected, also can be indirectly connected through intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0050] As Figures 1 to 6 Indicated, the application embodiment provides a kind of battery pack, comprising: shell 1, battery module 2, high voltage component, insulating cover 4 and MSD switch 5.Shell 1 has cavity, battery module 2 is set in the cavity, high voltage component is each high voltage component in prior art in high voltage box, including copper bar 3 and cable etc..The specific structure of high voltage component is disclosed more in prior art, this application will not repeat here.High voltage component is set in the cavity, high voltage component and battery module 2 are located in the same shell 1.High voltage component is electrically connected to the battery module 2, the high voltage component includes copper bar 3, insulating cover 4 at least partially located in the cavity, the insulating cover 4 is connected to the shell 1, the insulating cover 4 has isolation chamber, MSD switch 5 is installed in the shell 1 and / or insulating cover 4, the MSD switch 5 at least partially extends into the isolation chamber, copper bar 3 extends into the isolation chamber and is connected to MSD switch 5.

[0051] In the application embodiment, high voltage component is integrated in battery pack, reduces or avoids the redundant space occupation problem of wire harness and connector existing in traditional split design, so that the overall volume of battery system is greatly reduced.In the application embodiment, high voltage component and battery pack are integrated and designed, which reduces the repeated parts of shell, which is beneficial to weight reduction.In the application embodiment, the connection part of copper bar 3 and MSD switch 5 is located inside the insulating cover 4, and the insulating cover 4 plays the role of insulating isolation and heat insulation for the connection part of copper bar 3 and MSD switch 5, which improves safety.When the connection part of copper bar 3 and MSD switch 5 is damaged due to overheating ablation, the insulating cover 4 can be removed to clean and maintain the connection part of copper bar 3 and MSD switch 5.The copper bar 3 and the MSD switch 5 can be connected by bolts at the connection part.In the event of connection failure at the connection part of copper bar 3 and MSD switch 5, the bolts can be removed and replaced or other operations can be performed for maintenance, so that the battery pack can quickly return to normal state.In addition, the insulating cover 4 also plays the role of enhancing the connection structure strength of copper bar 3 and MSD switch 5.

[0052] In some possible embodiments, in combination Figure 2 And Figure 6As shown in the drawings, the insulation cover 4 is provided with a lead port 420 which communicates the isolation cavity and the cavity, and the copper bar 3 extends into the isolation cavity through the lead port 420 to connect the MSD switch 5. The lead port 420 is formed on the insulation cover 4, and the end of the copper bar extends into the isolation cavity through the lead port 420.

[0053] In some possible embodiments, the insulation cover 4 has an end wall 41 and a peripheral side wall 42 which is arranged around the edge of the end wall 41, the end wall 41 and the inner wall of the shell 1 have a gap, the peripheral side wall 42 extends from the end wall 41 to the outside of the shell 1, and the lead port 420 is arranged on the peripheral side wall 42. The peripheral side wall 42 can be directly or indirectly connected to the shell 1, the lead port 420 is arranged on the peripheral side wall 42, and the end of the copper bar 3 can extend into the isolation cavity through the lead port 420 on the peripheral side wall 42 and be connected to the MSD switch 5 through a bolt. For example, the lead port 420 can be arranged on the side of the peripheral side wall 42 which is close to the bottom wall of the shell 1, and the copper bar 3 can be bent below the insulation cover 4 and then extend upward to extend into the isolation cavity.

[0054] One end of the copper bar 3 which extends into the isolation cavity can be provided with a nut, and a bolt can be screwed into the nut through part of the structure of the MSD switch from the end of the insulation cover 4 which is away from the end wall 41, so as to fix the copper bar and the MSD switch. It should be noted that the structure of the MSD switch and the connection structure of the MSD and the copper bar are mature prior art, and the MSD switch selected in the present application can be a product on sale.

[0055] In some possible embodiments, in combination with Figure 2 、 Figure 4 、 Figure 5 and Figure 6 As shown in the drawings, the peripheral side wall 42 is provided with a plurality of holes, each of which is provided with a baffle 421, the baffle 421 is connected to the peripheral side wall 42 through a plurality of connecting parts, each of which is arranged in sequence and spaced apart along the edge of the baffle 421, and in the state that the baffle 421 is separated from the peripheral side wall 42, the hole is open, forming a lead port 420 which communicates the cavity and the isolation cavity.

[0056] The holes are arranged on the peripheral side wall 42, and in the unassembled state, each hole is closed by the baffle 421, and the peripheral edge of the baffle 421 is connected through intermittent connecting points. The baffle 421 is arranged in a structure which is easy to tear off, and in the assembly process, the baffle 421 at a suitable position can be selected and torn off according to actual needs.

[0057] In some possible embodiments, the thickness of the baffle 421 is less than the thickness of the peripheral side wall 42. The thickness of the baffle 421 is small, and the peripheral side is intermittently connected to the thicker peripheral side wall 42 through the connecting portion. The baffle 421 is light and thin in structure, and is easy to be torn off, which facilitates the assembly personnel to tear off the corresponding baffle 421 according to the actual situation.

[0058] In some possible embodiments, the peripheral side wall 42 is provided with a plurality of side walls, and the side walls are sequentially connected. Adjacent side walls have an included angle. Two lead ports 420 are arranged on one side wall. Two copper bars 3 of the high-voltage assembly respectively extend into the isolation cavity through the lead ports 420 to connect the MSD switch 5. Figures 3 to 6 As shown in the drawings, the peripheral side wall 42 has a plurality of side walls, and the side walls are sequentially connected. Adjacent side walls have an included angle. Two lead ports 420 are arranged on one side wall. Two copper bars 3 of the high-voltage assembly respectively extend into the isolation cavity through the lead ports 420 to connect the MSD switch 5.

[0059] The MSD switch 5 needs to be connected with two copper bars 3. By arranging two lead ports 420 on the same side wall, two parallel copper bars 3 can respectively extend into the isolation cavity through the two lead ports 420 on the same side wall to connect the MSD switch 5. The bending shape and extension track of the two copper bars 3 are basically consistent, and the two copper bars 3 are orderly arranged.

[0060] In some possible embodiments, as shown in the drawings, Figure 6 As shown in the drawings, the peripheral side wall 42 is provided with a partition rib 422 located between two adjacent lead ports 420.

[0061] The partition rib 422 can be arranged between the two lead ports 420 on the same side wall of the peripheral side wall 42. The partition rib 422 separates the two copper bars 3, so that the two copper bars 3 are not too close to each other and are prevented from malfunctioning, thereby improving safety.

[0062] In some possible embodiments, as shown in the drawings, Figure 2 As shown in the drawings, the end wall 41 is provided with a heat dissipation hole 411 communicating with the isolation cavity. When the connection part of the copper bar 3 and the MSD switch 5 is overheated, heat can be released from the heat dissipation hole 411 to the outside of the isolation cavity, so as to prevent the inside of the insulation cover 4 from being too hot. The insulation cover 4 can be made of insulating and high-temperature-resistant materials.

[0063] In some possible embodiments, the peripheral side edge of the insulation cover 4 is provided with a flange portion 431. The insulation cover 4 penetrates through the shell 1, and the flange portion 431 is attached to the outer surface of the shell 1. The flange portion 431 is connected to the shell 1 through a fastener 6.

[0064] In this embodiment, the flange portion 431 can be provided with a relief hole. The fastener 6 can be a bolt. The shank of the bolt is threadedly connected to the shell 1 through the relief hole, and the cap of the bolt is limited on the flange portion 431.

[0065] In some possible embodiments, the insulation cover 4 has an outer shell 43 exposed outside the outer shell 1, the outer shell 43 has an outer cavity, the outer cavity communicates with the isolation cavity, and the MSD switch 5 is at least partially structured to be accommodated in the outer cavity.

[0066] By setting the insulation cover 4 to extend out of the outer shell 43, the MSD switch 5 can be conveniently set, so that the MSD switch 5 is far away from the battery module 2 in the outer shell 1, and the safety is improved. Part of the structure of the MSD switch 5 extends into the outer cavity and extends to the isolation cavity, so as to facilitate connection with the copper bar 3, and part of the structure of the MSD switch 5 extends out of the outer cavity, facilitating plugging and unplugging of the MSD switch 5.

[0067] The high-voltage assembly and the battery module 2 integrated battery pack of the application can be applied to a new energy tractor as a battery of the new energy tractor, because the battery module 2 and the high-voltage assembly are integrated and designed, the space is fully utilized, and the endurance is increased, and the application also provides a more stable and safer battery pack for the new energy tractor.

[0068] As shown in Figure 7 The application also provides an agricultural machine, which comprises a vehicle body 200 and the battery pack 100. A walking mechanism is arranged on the vehicle body 200, and the battery pack 100 is arranged on the vehicle body 200 and electrically connected to the walking mechanism to provide walking power for the walking mechanism. The walking mechanism can comprise a motor and a wheel. The vehicle body 200 comprises a vehicle body 200 and a hood 210, the walking mechanism is arranged on the vehicle body, and the battery pack 100 can be mounted on the top of the vehicle body, and the hood 210 can be mounted on the vehicle body 200 and cover the battery pack 100 to protect the battery pack 100.

[0069] It should be noted that the battery pack 100 is located inside the hood 210 and is shielded by the hood 210, Figure 7 The setting position of the battery pack 100 is shown by a dashed line box.

[0070] The above only describes the preferred embodiments of the application, and does not limit the application in any form. Although the application has been disclosed as above, it is not intended to limit the application. Any person skilled in the art can make some changes or modifications to the above-mentioned technical content without departing from the technical solution of the application, and equivalent embodiments with equivalent changes and modifications are equivalent. Any simple modification, equivalent change and modification of the above embodiments based on the technical essence of the application are still within the scope of the application.

Claims

1. A battery pack, characterized in that, include: The outer casing has a cavity; A battery module, wherein the battery module is disposed within the cavity; A high-voltage component is disposed within the cavity and connected to the battery module. The high-voltage component includes a copper busbar. An insulating cover, at least partially located in the cavity, the insulating cover being connected to the outer shell, the insulating cover having an isolation cavity; MSD switch, wherein the MSD switch is mounted on the housing and / or insulating cover, and the MSD switch extends at least partially into the isolation cavity; The copper busbar extends into the isolation cavity and is connected to the MSD switch.

2. The battery pack according to claim 1, characterized in that, The insulating cover is provided with a lead-in port that connects the isolation cavity and the cavity; The copper busbar extends into the isolation cavity from the lead port to connect to the MSD switch.

3. The battery pack according to claim 2, characterized in that, The insulating cover has an end wall and a peripheral side wall disposed around the edge of the end wall; The end wall and the inner wall of the outer shell have a gap, and the peripheral sidewall extends from the end wall to the outside of the outer shell; The lead hole is provided on the peripheral sidewall.

4. The battery pack according to claim 3, characterized in that, Multiple openings are provided on the peripheral sidewall, and a baffle is provided in each opening. The baffle is connected to the peripheral sidewall through multiple connecting parts, and the connecting parts are arranged sequentially at intervals along the edge of the baffle. When the baffle plate is detached from the peripheral sidewall, the opening is open, forming a lead-in port connecting the cavity and the isolation cavity.

5. The battery pack according to claim 4, characterized in that, The thickness of the baffle is less than the thickness of the peripheral sidewall.

6. The battery pack according to claim 3, characterized in that, The peripheral sidewall has multiple sidewalls, which are connected in sequence, and adjacent sidewalls have an included angle. Two lead ports are provided on the side wall described above; The two copper busbars of the high-voltage component extend into the isolation cavity through the lead port to connect to the MSD switch.

7. The battery pack according to claim 6, characterized in that, The peripheral sidewall is provided with partition ribs; The separator rib is located between two adjacent lead ports.

8. The battery pack according to claim 3, characterized in that, The end wall is provided with heat dissipation holes that connect to the isolation cavity.

9. The battery pack according to any one of claims 1-8, characterized in that, The insulating cover is provided with a flange along its peripheral edge; The insulating cover extends through the outer shell, and the flange portion is attached to the outer surface of the outer shell; The flange is connected to the housing by fasteners.

10. The battery pack according to any one of claims 1-8, characterized in that, The insulating cover has an outer shell exposed outside the housing, the outer shell having an outer cavity communicating with the isolation cavity, and the MSD switch having at least a portion of its structure housed in the outer cavity.

11. An agricultural machine, characterized in that, include: Vehicle body, on which a traveling mechanism is provided; The battery pack as described in any of claims 1-10 is disposed on the vehicle body and electrically connected to the running gear.

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