High-voltage connection structure of power battery integrated system and power battery integrated system

Abstract

The utility model relates to a high-voltage connection structure of a power battery integrated system, the power battery integrated system comprises a plurality of layers of battery packs which are stacked in sequence, and each battery pack comprises a plurality of modules which are stacked in sequence; the power battery integration system is divided into a plurality of areas in the module stacking direction; the high-voltage connecting structure of the power battery integrated system comprises a plurality of connecting branches and a high-voltage plug-in, the connecting branches correspond to a plurality of areas respectively, a plurality of modules in the same area are connected through the corresponding connecting branches, and the two ends of each connecting branch are connected to the high-voltage plug-in. According to the utility model, the plurality of modules in one area are electrically connected with the high-voltage plug-in through the connecting branches, the high-voltage connecting structure of the power battery integrated system is provided with the plurality of connecting branches, and different numbers of connecting branches are matched according to the use requirements of different electric quantity systems, so that the use requirements of different electric quantity systems can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a high-voltage connection structure of a power battery integrated system and a power battery integrated system. Background Art

[0002] The application of new energy technologies in the construction machinery sector has become an industry consensus, especially the development and application of power battery technology, which holds enormous potential and significant significance. Construction machinery is characterized by high power and high energy consumption. Currently, most electrification solutions in the construction machinery sector use standard box power batteries, but standard box power batteries can only be assembled into a single layer of battery modules. To improve their endurance, they are usually stacked to increase the total power, which results in low space utilization and energy density. The MTB (Module to Bracket) structural design integrates battery modules directly into the vehicle bracket or chassis, greatly improving the space utilization of construction vehicles, reducing the weight of the power battery system, and effectively increasing the energy density of the power battery system.

[0003] However, due to the large structure of the MTB power battery system, the high-voltage connection form of the power battery system is relatively complex, the copper busbar is long, the unit cost is high, and the high-voltage connection assembly process is poor, and after-sales maintenance is inconvenient. It does not meet the requirements of modular assembly and cannot achieve universal use of products with different power levels. Utility Model Content

[0004] Based on this, in view of the technical problems that the current MTB power battery system has a large structure, a complex high-voltage connection form, a long copper busbar, a high unit cost, poor high-voltage connection assembly processability, inconvenient after-sales maintenance, does not meet the requirements of modular assembly, and cannot achieve universal use of products with different power levels, the present utility model provides a power battery integrated system high-voltage connection structure and a power battery integrated system.

[0005] The present utility model provides a high-voltage connection structure for a power battery integrated system, wherein the power battery integrated system includes several layers of battery packs stacked in sequence, each battery pack includes multiple modules stacked in sequence; the power battery integrated system is divided into several areas along the module stacking direction; the high-voltage connection structure for the power battery integrated system includes several connecting branches and high-voltage plug-ins, and the several connecting branches correspond to the several areas respectively. Multiple modules in the same area are connected through corresponding connecting branches, and both ends of the connecting branches are connected to the high-voltage plug-ins.

[0006] The utility model realizes electrical connection between multiple modules in one area and the high-voltage plug-in through connecting branches, and arranges the high-voltage connection structure of the power battery integrated system into several connecting branches, which can meet the use requirements of different power systems.

[0007] As a further improvement of the above solution of the present invention, each connecting branch includes multiple layers of connecting copper busbars; in each area, any two adjacent modules in each battery pack are electrically connected through a layer of connecting copper busbars.

[0008] As a further improvement to the above-mentioned solution of the present invention, each connection branch also includes multiple interlayer copper busbars 1, arranged in an S-shaped pattern. Within each region, two modules at either end of each battery pack are connected to a layer copper busbar 2, and two layer copper busbars 2 at the same end of any two adjacent battery packs are electrically connected via an interlayer copper busbar 1. Depending on the number of battery packs, the connection branches are matched with different numbers of interlayer copper busbars 1 to meet the usage requirements of different power systems.

[0009] As a further improvement of the above-mentioned solution of the present invention, each connecting branch also includes an interlayer connecting copper bar 2; one end of the interlayer connecting copper bar 2 is connected to the layer connecting copper bar 2 in the battery pack at the bottom layer that is not connected to the interlayer connecting copper bar 1, and the other end of the interlayer connecting copper bar 2 is connected to the high-voltage plug-in.

[0010] As a further improvement of the above-mentioned scheme of the present invention, the power battery integrated system also includes a box body; multiple modules of the battery pack are assembled in the box body, and windows are opened on the box body at positions corresponding to each module to expose the end plate insulating column of the module; the interlayer connecting copper bar one and the layer connecting copper bar two are connected by mounting bolt one, and the mounting bolt one is fixed on an end plate insulating column; the interlayer connecting copper bar two and the layer connecting copper bar two are connected by mounting bolt two, and the mounting bolt two is fixed on an end plate insulating column.

[0011] As a further improvement of the above solution of the present invention, an insulating protective cover is detachably installed on the box body at a position outside each window.

[0012] As a further improvement of the above solution of the present invention, in each area, the layer connection copper bar 2 in the battery pack at the top layer that is not connected to the interlayer connection copper bar 1 is connected to the high-voltage plug-in.

[0013] The utility model provides a power battery integrated system, which includes the power battery integrated system high-voltage connection structure as described above.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The utility model realizes electrical connection between multiple modules in one area and the high-voltage plug-in through connecting branches, and sets the high-voltage connection structure of the power battery integrated system into several connecting branches, which can meet the use requirements of different power systems.

[0016] 2. In the connection branch of the present invention, the electrical connection between the two adjacent modules of each layer of battery pack is achieved through the layer connection copper busbar 1, and the connection between any two adjacent layers of battery pack is achieved through the interlayer connection copper busbar 2. Different numbers of interlayer connection copper busbars 1 can be matched according to the battery packs with different numbers of layers, which can not only meet the high-voltage connection of the single-layer battery system, but also meet the use requirements of different power systems; the segmented design of the connection copper busbars of each connection branch can reduce the types of copper busbars in the system, simplify the copper busbar structure, and reduce development costs.

[0017] 3. The utility model has windows on the box of each battery pack, and the interlayer connecting copper bar 1 and the interlayer connecting copper bar 2 are installed at the windows, which facilitates high-voltage connection and facilitates subsequent inspection and maintenance. After-sales maintenance can ensure the disassembly of the single-layer battery pack and reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of a power battery integration system proposed in an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of a high-voltage connection structure of a power battery integrated system proposed in an embodiment of the present utility model;

[0020] Figure 3 This is a schematic assembly diagram of a high-voltage connection structure for a power battery integration system proposed in an embodiment of the present utility model.

[0021] Figure numerals: 100, area; 101, module; 102, box; 103, window; 104, insulating protective cover; 200, connecting branch; 201, high-voltage plug-in; 202, layer connecting copper busbar 1; 203, interlayer connecting copper busbar 1; 204, layer connecting copper busbar 2; 205, interlayer connecting copper busbar 2; 206, mounting bolt 1; 207, mounting bolt 2. DETAILED DESCRIPTION

[0022] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to specific embodiments. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to facilitate a more thorough and comprehensive understanding of the disclosure of the present invention.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0024] This embodiment provides a high-voltage connection structure for a power battery integrated system, which is used in a power battery integrated system, such as Figure 1 As shown, the power battery integrated system mainly includes a box body 102 and several layers of battery packs stacked in the vertical direction in the box body 102, and each layer of battery packs includes multiple modules 101 stacked in the horizontal direction. Figure 2 The high-voltage connection structure of the power battery integrated system of this embodiment includes several connection branches 200 and a high-voltage plug-in 201.

[0025] In this embodiment, in order to facilitate the high voltage connection of the power battery integrated system, the power battery integrated system is divided into several areas 100 along the stacking direction of the modules 101. Figure 2 Taking a five-layer battery pack as an example, the power battery integrated system is divided into three regions 100 along the stacking direction of the modules 101. The multiple modules 101 of each layer of the battery pack are evenly distributed within the three regions 100. Corresponding to the three regions 100, the power battery integrated system high-voltage connection structure is equipped with three connecting branches 200. The three connecting branches 200 are respectively provided for the three regions 100. The multiple modules 101 in each region 100 are electrically connected to the high-voltage plug-in 201 through the corresponding connecting branches 200.

[0026] In this embodiment, each connection branch 200 includes a plurality of layer connection copper bars 1 202, a plurality of interlayer connection copper bars 1 203, a plurality of layer connection copper bars 204 and an interlayer connection copper bar 205. In each area 100: a layer connection copper bar 1 202 is provided between any two adjacent modules 101 in each battery pack, one end of the layer connection copper bar 1 202 is electrically connected to the positive end of an adjacent module 101 and the other end thereof is electrically connected to the negative end of another adjacent module 101; in the two modules 101 at the two ends of each battery pack, the positive end of one module 101 is electrically connected to a layer connection copper bar 2 204, and the negative end of the other module 101 is electrically connected to a layer connection copper bar 2 204; a plurality of interlayer connection copper bars 1 203 are distributed in an S shape and are provided between any two adjacent battery packs. There is an interlayer connecting copper bar 1 203, and the two interlayer connecting copper bars 204 at the same end in any two adjacent battery packs are respectively connected to the two ends of the interlayer connecting copper bar 1 203 through the mounting bolt 1 206; the layer connecting copper bar 204 in the battery pack at the bottom layer that is not connected to the interlayer connecting copper bar 1 203 is connected to one end of the interlayer connecting copper bar 205 through the mounting bolt 207, and the other end of the interlayer connecting copper bar 205 is connected to the high-voltage plug-in 201; the layer connecting copper bar 204 in the battery pack at the top layer that is not connected to the interlayer connecting copper bar 1 203 is connected to the high-voltage plug-in 201.

[0027] It should be noted that if the power battery integration system includes only one layer of battery pack, in each area 100: any two adjacent modules 101 are connected through the layer connection copper bus 1 202, and the layer connection copper bus 2 204 of the modules 101 at both ends are connected to the high-voltage plug-in 201, thereby completing the high-voltage connection of the single-layer battery system.

[0028] Through the above structural setting, multiple modules 101 in an area 100 are electrically connected to the high-voltage plug-in 201 through the connecting branch 200, and the high-voltage connection structure of the power battery integrated system is set into several connecting branches 200. Different connecting branches 200 are matched according to the use requirements of different power systems, and different numbers of interlayer connecting copper bars 203 are matched according to battery packs with different numbers of layers. This can meet the high-voltage connection of a single-layer battery system and the use requirements of different power systems; the segmented design of the connecting copper bars of each connecting branch 200 can reduce the types of copper bars in the system, simplify the copper bar structure, and reduce development costs.

[0029] In this embodiment, in order to facilitate the connection between two adjacent battery packs, Figure 3 A window 103 is provided on the box body 102 at a position corresponding to each module 101. An insulating protective cover 104 is detachably connected to the outside of the window 103 by bolts. When the insulating protective cover 104 is opened, the end plate insulating column of the module 101 can be exposed. Since the high-voltage connection between the modules 101 in the battery pack has been completed before the battery pack is assembled into a power battery integrated system, high-voltage assembly between the upper and lower battery packs is required when assembling the power battery integrated system. During assembly, open the two insulating protective covers 104 on the box body 102 corresponding to the modules 101 located at both ends of the area, and connect the interlayer connecting copper busbar 1 203 to the corresponding layer connecting copper busbar 2 204 through the mounting bolt 1 206 at the window 103, and fix the mounting bolt 1 206 on the end plate insulating column corresponding to the window 103. At the same time, connect the interlayer connecting copper busbar 2 205 to the corresponding layer connecting copper busbar 2 204 through the mounting bolt 207 at the window 103, and fix the mounting bolt 207 on the end plate insulating column corresponding to the window 103. This embodiment facilitates high-voltage connection by installing the interlayer connecting copper busbar 1 203 and the interlayer connecting copper busbar 2 205 at the window 103, and is also convenient for later inspection and maintenance. After-sales maintenance can ensure the disassembly of the single-layer battery pack and reduce maintenance costs.

[0030] With the above structural arrangement, the power battery integration system of this embodiment performs the following steps when performing high voltage connection:

[0031] (1) After the module 101 of the single-layer battery pack is assembled into the box 102, the high-voltage copper busbars between the modules 101 are assembled in the following order: the layer connection copper busbar 1 202 and the layer connection copper busbar 2 204 of each connecting branch are assembled in sequence;

[0032] (2) Stack several layers of battery packs from bottom to top, assemble interlayer copper busbar 1 203 and interlayer copper busbar 2 205 from the window 103 of the box body 102, use mounting bolt 1 206 and mounting bolt 2 207 to fix interlayer copper busbar 1 203 and interlayer copper busbar 2 205 on the end plate insulating column of the module 101 respectively, and assemble insulating protective cover 104 to cover the window 103; finally, connect interlayer copper busbar 2 205 and layer copper busbar 2 204 in the top battery pack that is not connected to interlayer copper busbar 1 203 to a high-voltage plug-in 201.

[0033] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component. When a component is considered to be "fixed to" another component, it may be directly fixed to the other component or there may be a central component.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are for the purpose of describing specific embodiments only and are not intended to limit this invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A high-voltage connection structure for a power battery integrated system, wherein the power battery integrated system comprises a plurality of battery packs stacked in sequence, each battery pack comprising a plurality of modules (101) stacked in sequence; characterized in that: The power battery integrated system is divided into a plurality of areas (100) along the stacking direction of the modules (101); the high-voltage connection structure of the power battery integrated system includes a plurality of connection branches (200) and a high-voltage plug-in (201); the plurality of connection branches (200) respectively correspond to the plurality of areas (100); a plurality of modules (101) in the same area (100) are connected via the corresponding connection branches (200); both ends of the connection branches (200) are connected to the high-voltage plug-in (201).

2. The high-voltage connection structure of the power battery integrated system according to claim 1, characterized in that: Each connection branch (200) includes a plurality of layer connection copper busbars (202); within each area (100), any two adjacent modules (101) in each battery pack are electrically connected via a layer connection copper busbar (202).

3. The high-voltage connection structure of the power battery integrated system according to claim 2, characterized in that: Each connecting branch (200) further comprises a plurality of interlayer connecting copper bars (203), and the plurality of interlayer connecting copper bars (203) are distributed in an S-shape; within each region (100), the two modules (101) at both ends of each battery pack are connected to a second layer connecting copper bar (204), and the two second layer connecting copper bars (204) at the same end of any two adjacent battery packs are electrically connected via an interlayer connecting copper bar (203).

4. The high-voltage connection structure of the power battery integrated system according to claim 3, characterized in that: Each connecting branch (200) further includes an interlayer connecting copper bar (205); one end of the interlayer connecting copper bar (205) is connected to a layer connecting copper bar (204) in the battery pack at the bottom layer that is not connected to the interlayer connecting copper bar (203), and the other end of the interlayer connecting copper bar (205) is connected to the high-voltage plug-in (201).

5. The high-voltage connection structure of the power battery integrated system according to claim 4, characterized in that: The power battery integrated system further comprises a box (102); a plurality of modules (101) of the battery pack are all assembled in the box (102); windows (103) are provided on the box (102) at positions corresponding to the modules (101) to expose the end plate insulating columns of the modules (101); the first interlayer connecting copper bar (203) and the second interlayer connecting copper bar (204) are connected by a first mounting bolt (206), and the first mounting bolt (206) is fixed on an end plate insulating column; the second interlayer connecting copper bar (205) and the second interlayer connecting copper bar (204) are connected by a second mounting bolt (207), and the second mounting bolt (207) is fixed on an end plate insulating column.

6. The high-voltage connection structure of the power battery integrated system according to claim 5, characterized in that: An insulating protective cover (104) is detachably mounted on the box body (102) at a position outside each window (103).

7. The high-voltage connection structure of the power battery integrated system according to claim 3, characterized in that: In each of the regions (100), the second layer connection copper bar (204) in the uppermost battery pack that is not connected to the first interlayer connection copper bar (203) is connected to the high-voltage plug-in (201).

8. A power battery integration system, characterized in that: It includes a power battery integrated system high-voltage connection structure as described in any one of claims 1 to 7.

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