High-voltage battery pack of unmanned aerial vehicle

Abstract

The utility model relates to an unmanned aerial vehicle high-voltage battery pack which comprises a plurality of battery modules, and each battery module is divided into a first row of modules and a second row of modules which are arranged left and right. The first row of modules comprises a first battery module positioned on the front side, at least one second battery module positioned in the middle and a third battery module positioned on the rear side; the second row of modules comprises a fourth battery module positioned on the front side, at least one fifth battery module positioned in the middle and a sixth battery module positioned on the rear side; a total positive electrode is arranged on the third battery module, and a total negative electrode is arranged on the sixth battery module; each battery module is provided with a positive electrode and a negative electrode in the front-back direction, and every two adjacent battery modules connected in series are connected through a copper bar. The battery module structure and layout of the battery pack are optimally designed, the number of the battery modules can be conveniently increased or decreased according to the capacity requirement of the battery pack, the expansibility is high, and the reliability and the safety are also improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a high-voltage battery pack for drones. Background Technology

[0002] To meet voltage and capacity requirements, battery packs typically require multiple battery modules connected in series or parallel, with copper busbars directly linking the modules. Currently, the battery module tabs are located on the sidewalls of the battery modules, causing interference to the copper busbar connection direction. Due to limited internal space within the battery pack, the connections between battery modules involve multiple directions, requiring special attention to ensure the positive and negative terminals are not connected incorrectly. Furthermore, the modules lack versatility, making it difficult to expand the battery pack's design once finalized. Utility Model Content

[0003] The purpose of this invention is to provide a high-voltage battery pack for drones, which improves the ease of assembly and expandability of the battery pack.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] The high-voltage battery pack for drones includes several battery modules. Each battery module is divided into a first row of modules arranged left and right and a second row of modules. The first row of modules includes a first battery module located at the front, at least one second battery module located in the middle, and a third battery module located at the rear. The second row of modules includes a fourth battery module located at the front, at least one fifth battery module located in the middle, and a sixth battery module located at the rear. The third battery module is provided with a total positive or a total negative terminal, and the sixth battery module is provided with a total negative or a total positive terminal. Each battery module is provided with a positive terminal and a negative terminal in the front-to-back direction, and two adjacent battery modules connected in series are connected by a copper busbar.

[0006] Furthermore, one of the two adjacent battery modules has a positioning protrusion on its upper part, and the other battery module has a positioning groove on its upper part that engages with the positioning protrusion.

[0007] Furthermore, the first battery module has at least a positioning protrusion or a positioning groove on its rear side, and the fourth battery module has at least a positioning protrusion or a positioning groove on its rear side.

[0008] Furthermore, the right side of the first battery module is provided with a positioning protrusion or a positioning groove, and the left side of the first battery module is provided with a positioning groove or a positioning protrusion.

[0009] Furthermore, the second battery module has positioning protrusions or positioning grooves on both the front and rear sides, and the fifth battery module has positioning grooves or positioning protrusions on both the front and rear sides.

[0010] Furthermore, the second battery module has a positioning protrusion or positioning groove on its right side, and the fifth battery module has a positioning groove or positioning protrusion on its left side.

[0011] Furthermore, the third battery module has at least a positioning protrusion or a positioning groove on the front side, and the sixth battery module has at least a positioning groove or a positioning protrusion on the front side.

[0012] Furthermore, the battery modules are connected in series. The first and fourth battery modules each have two different copper busbar slots, defined as the first copper busbar slot and the second copper busbar slot, which are arranged in an L-shape. The first and fourth battery modules are connected through the first copper busbar located in the first copper busbar slot. The second and fifth battery modules each have two identical third copper busbar slots. The two third copper busbar slots of each of the second and fifth battery modules are arranged in a straight line. Adjacent second battery modules and adjacent fifth battery modules are connected through the second copper busbar. The first and second copper busbars are connected to the positive terminal at one end and to the negative terminal at the other end.

[0013] Furthermore, it also includes a control box, which is located on top of the third battery module and the sixth battery module.

[0014] Furthermore, it also includes a control box located above the third and sixth battery modules. The first row of modules includes a first battery module at the front, at least one second battery module in the middle, and a third battery module at the rear. The second row of modules includes a fourth battery module at the front, at least one fifth battery module in the middle, and a sixth battery module at the rear. The battery modules in the first row are connected in series, and the battery modules in the second row are connected in series. The first and second rows of modules are in parallel. The total positive terminal is defined as the first total positive terminal, and the control box also has a first total negative terminal. The total negative terminal on the sixth battery module is defined as the second total negative terminal, and the control box also has a second total positive terminal. Each battery module has a positive terminal and a negative terminal in the front-rear direction, and two adjacent battery modules connected in series are connected by a copper busbar.

[0015] The beneficial effects of this utility model are:

[0016] The positive and negative terminals of each battery module are spaced apart in the front-to-back direction, and adjacent battery modules are connected by copper busbars. The middle battery modules in the same row have the same structure, and the number of battery modules can be increased or decreased according to the capacity requirements of the battery pack without changing the original structural design of the battery modules, thus improving the scalability of the battery pack.

[0017] One of the two adjacent battery modules has a positioning protrusion on its upper part, and the other battery module has a positioning groove on its upper part that engages with the positioning protrusion. The positioning protrusion and the positioning groove work together to provide positioning during assembly, making assembly convenient and quick, and also preventing the battery modules from being installed backwards.

[0018] The top cover of the battery module has copper busbar grooves and wire grooves. The copper busbars and signal lines are located in the grooves. After laying the insulating strip, the upper side of the battery pack is basically flat, which not only improves the structural compactness, but also improves the safety of the battery pack.

[0019] The battery modules can be connected in series to form a battery pack; or they can be divided into two parallel groups, which serve as backups for each other. If one group fails, the other group will take over, providing uninterrupted power to the drone, thereby improving reliability and safety. Attached Figure Description

[0020] Figure 1 This is a perspective view of Embodiment 1 of the high-voltage battery pack for unmanned aerial vehicles of this utility model;

[0021] Figure 2 This is a 3D view of the first battery module;

[0022] Figure 3 This is a 3D view of the second battery module;

[0023] Figure 4 This is a diagram showing the interaction between the third and sixth battery modules;

[0024] Figure 5 This is a top view of Embodiment 2 of the high-voltage battery pack for unmanned aerial vehicles according to this utility model.

[0025] 1. First battery module; 11. First positioning groove; 2. Second battery module; 21. Second positioning protrusion; 22. Second positioning groove; 23. Wire groove; 3. Third battery module; 31. Third positioning protrusion; 4. Fourth battery module; 5. Fifth battery module; 6. Sixth battery module; 61. Sixth positioning groove; 62. Sixth positioning protrusion; 7. Control box; 81. First copper busbar; 82. Second copper busbar; 83. First copper busbar groove; 84. Second copper busbar groove; 85. Third copper busbar groove; 91. Positive copper post; 92. Negative copper post. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art are within the protection scope of the present utility model.

[0027] Embodiment 1 of this utility model:

[0028] like Figures 1-4 As shown, the high-voltage battery pack for the drone includes several battery modules connected in series. Each battery module is divided into a first row of modules arranged on the left and right and a second row of modules. The first row of modules includes a first battery module 1 located on the front side, at least one second battery module 2 located in the middle, and a third battery module 3 located on the rear side. The second row of modules includes a fourth battery module 4 located on the front side, at least one fifth battery module 5 located in the middle, and a sixth battery module 6 located on the rear side.

[0029] In this embodiment, there are two second battery modules 2 and two fourth battery modules 4. Each battery module has a positive and a negative electrode in the front-to-back direction, respectively. The positive electrode on the third battery module 3 is the overall positive electrode, and the negative electrode on the sixth battery module 6 is the overall negative electrode. The battery modules are connected in series, with the overall positive and negative electrodes serving as the output terminals of the battery pack. Adjacent battery modules connected in series are connected by copper busbars.

[0030] One of two adjacent battery modules has a positioning protrusion on its upper part, and the other battery module has a positioning groove on its upper part that engages with the positioning protrusion. The positioning protrusion and groove work together to provide positioning during assembly, allowing for convenient and quick assembly. After insertion, the positioning protrusion and groove are connected using vertically positioned screws. In this embodiment, there are eight battery modules. Depending on their placement, the location and number of positioning protrusions and grooves vary slightly, resulting in four different external structures, as detailed below:

[0031] In this embodiment, the positioning protrusions or grooves of each battery module have the same structure. For easy differentiation, the positioning protrusions or grooves of different battery modules are marked. Both the positioning protrusions and grooves are located on the top cover of the battery module. The bottom shell of the battery module has an opening at the top for inserting several series-connected battery cells. In this embodiment, the battery pack is divided into several battery modules, which are then connected in series, allowing for the direct output of a higher DC voltage. The battery pack is mounted on the drone to power it.

[0032] In this embodiment, as Figure 2 As shown, the first battery module 1 has positioning grooves on both the rear and right sides, denoted as the first positioning groove 11; the fourth battery module 4 has positioning protrusions on both the rear and left sides, denoted as the fourth positioning protrusion; the positioning protrusion on the left side of the fourth battery module 4 is inserted into the positioning groove on the right side of the first battery module 1. In other embodiments, the positions can be reversed, with the first battery module 1 having positioning protrusions and the fourth battery module 4 having positioning grooves.

[0033] like Figure 3As shown, the front side of the second battery module 2 is provided with a positioning protrusion, referred to as the second positioning protrusion 21; the rear side and the right side of the second battery module 2 are provided with positioning grooves, referred to as the second positioning grooves 22.

[0034] The fifth battery module 5 has positioning protrusions on its rear and left sides, referred to as the fifth positioning protrusions. The fifth battery module 5 has a positioning groove on its front side, referred to as the fifth positioning groove.

[0035] like Figure 4 As shown, the third battery module 3 has a positioning protrusion on the front side, denoted as the third positioning protrusion 31; and a positioning groove on the right side, denoted as the third positioning groove.

[0036] like Figure 4 As shown, the sixth battery module 6 has a positioning groove on the front side, denoted as the sixth positioning groove 61; and a positioning protrusion on the left side, denoted as the sixth positioning protrusion 62.

[0037] In this embodiment, the second battery module 2 and the fifth battery module 5 are general-purpose battery modules, and their number can be increased or decreased as needed, exhibiting good scalability. Similarly, they are arranged in two rows; the second battery module 2 can be arranged in three or four units in the front-to-back direction, and the fifth battery module 5 can also be arranged in three or four units in the front-to-back direction. The addition of the second battery module 2 and the fifth battery module 5 is very convenient, similar to the principle of building blocks. Because one side is raised and the other side is recessed in the front-to-back direction, adjacent battery modules are not easily installed backwards, serving as a foolproof design.

[0038] There are gaps between the bottom shells of adjacent battery modules to form heat dissipation channels.

[0039] In this embodiment, the front sides of the first battery module 1 and the fourth battery module 4 have neither positioning protrusions nor positioning grooves. The left side of the second battery module 2 and the right side of the fifth battery module 5 have neither positioning protrusions nor positioning grooves. The left and rear sides of the third battery module 3 and the right and rear sides of the sixth battery module 6 have neither positioning protrusions nor positioning grooves. This structural design, while satisfying the easy expandability of the battery modules, makes the overall volume of the battery pack more compact, with no unnecessary structures on the outer edges. In other embodiments, the distribution of positioning protrusions and positioning grooves in some battery modules can also be designed to be consistent, such as the first battery module 1 and the second battery module 2 having the same structure, and the fourth battery module 4 and the fifth battery module 5 having the same structure.

[0040] Both the first battery module 1 and the fourth battery module 4 are provided with two different copper busbar slots, defined as the first copper busbar slot 83 and the second copper busbar slot 84, which are distributed in an L-shape. The negative electrode of the first battery module 1 and the positive electrode of the fourth battery module 4 are connected through the first copper busbar 81 located in the first copper busbar slot 83.

[0041] Both the second battery module 2 and the fifth battery module 5 have two identical third copper busbar slots 85. These slots are arranged in a straight line and are structurally identical to the second copper busbar slots 84, allowing them to be connected. Adjacent second battery modules 2 and adjacent fifth battery modules 5 are connected via second copper busbars 82. Both the first copper busbar 81 and the second copper busbar 82 have one end connected to the positive terminal and the other end connected to the negative terminal. After the copper busbars are connected, an insulating strip is attached to the top, its sheet-like structure fitting into a shallow groove along the upper edge of the copper busbar slot.

[0042] A positive copper post 91 is connected to the main positive terminal, and a negative copper post 92 is connected to the main negative terminal, which can withstand large currents.

[0043] It also includes a control box 7, located above the third battery module 3 and the sixth battery module 6. Each battery module has a wire slot 23 on one side of the copper busbar groove for accommodating signal lines, using 6-pin wires. The signal lines connect each battery to the BMS board inside the control box 7. The improvement of this invention lies in the layout of the battery modules, not in the principle of the control box 7; existing control methods can be used, such as using the control box 7 to control the output of the battery pack.

[0044] Embodiment 2 of this utility model:

[0045] The design features and layout of the battery module structure provided in Example 1 are applicable not only to scenarios where battery modules are connected in series, but also to the following backup scenarios.

[0046] Figure 5 As shown, the first row of modules includes a first battery module 1 located at the front, two second battery modules 2 located in the middle, and a third battery module 3 located at the rear. The second row of modules includes a fourth battery module 4 located at the front, two fifth battery modules 5 located in the middle, and a sixth battery module 6 located at the rear. Each battery module has a positive and a negative terminal in the front-rear direction. The battery modules in the first row of modules 1 are connected in series via copper busbars; the battery modules in the second row of modules 2 are also connected in series via copper busbars. The main difference from Embodiment 1 is that the first row of modules 1 and the second row of modules 2 are in a parallel relationship, meaning that the first battery module 1 and the fourth battery module 4 are no longer connected in series via the first copper busbar. The first row of modules 1 and the second row of modules 2 serve as backups for each other. If one group fails, the control box can switch to the other group to ensure uninterrupted power supply to the drone during flight, improving reliability.

[0047] The positive terminal of the third battery module 3 is defined as the first overall positive terminal, and the control box also contains a first overall negative terminal; the negative terminal of the sixth battery module 6 is defined as the second overall positive terminal, and the control box also contains a second overall negative terminal. The outputs of the two rows of modules are identical: the first overall positive and negative terminals serve as the output terminals of the first row of modules, and the second overall positive and negative terminals serve as the output terminals of the second row of modules. The positive terminal of the first battery module is connected to the first overall positive terminal in the control box via a copper busbar, and the positive terminal of the fourth battery module is connected to the second overall positive terminal in the control box 7 via a copper busbar.

[0048] In Example 2, adjacent battery modules are still positioned and fitted together by positioning protrusions and positioning grooves.

[0049] Figure 5 The top view of the battery pack shown shows that insulating strips have been installed in the copper busbar and wire grooves. The copper busbars and signal lines are all located in the grooves. After the insulating strips are laid, the upper side of the battery pack is basically flat, which not only improves the structural compactness but also enhances the safety of the battery pack.

Claims

1. A high-voltage battery pack for unmanned aerial vehicles, characterized in that: It includes several battery modules, each battery module is divided into a first row of modules arranged left and right and a second row of modules. The first row of modules includes a first battery module located on the front side, at least one second battery module located in the middle, and a third battery module located on the rear side. The second row of modules includes a fourth battery module located on the front side, at least one fifth battery module located in the middle, and a sixth battery module located on the rear side. The third battery module is provided with a total positive electrode or a total negative electrode, and the sixth battery module is provided with a total negative electrode or a total positive electrode. Each battery module is provided with a positive electrode and a negative electrode in the front-back direction, and two adjacent battery modules connected in series are connected by a copper busbar.

2. The high-voltage battery pack for unmanned aerial vehicles according to claim 1, characterized in that: One of the two adjacent battery modules has a positioning protrusion on its upper part, and the other battery module has a positioning groove on its upper part that is inserted and engaged with the positioning protrusion.

3. The high-voltage battery pack for unmanned aerial vehicles according to claim 2, characterized in that: The first battery module has at least a positioning protrusion or a positioning groove on the rear side, and the fourth battery module has at least a positioning protrusion or a positioning groove on the rear side.

4. The high-voltage battery pack for unmanned aerial vehicles according to claim 3, characterized in that: The right side of the first battery module is provided with a positioning protrusion or positioning groove, and the left side of the first battery module is provided with a positioning groove or positioning protrusion.

5. The high-voltage battery pack for unmanned aerial vehicles according to claim 2, characterized in that: The second battery module has positioning protrusions or positioning grooves on both the front and rear sides, and the fifth battery module has positioning grooves or positioning protrusions on both the front and rear sides.

6. The high-voltage battery pack for unmanned aerial vehicles according to claim 5, characterized in that: The second battery module has a positioning protrusion or positioning groove on its right side, and the fifth battery module has a positioning groove or positioning protrusion on its left side.

7. The high-voltage battery pack for unmanned aerial vehicles according to claim 2, characterized in that: The third battery module has a positioning protrusion or positioning groove on the front side at least, and the sixth battery module has a positioning groove or positioning protrusion on the front side at least.

8. The high-voltage battery pack for unmanned aerial vehicles according to claim 1, characterized in that: The battery modules are connected in series. The first and fourth battery modules each have two different copper busbar slots, defined as the first copper busbar slot and the second copper busbar slot, which are arranged in an L-shape. The first and fourth battery modules are connected by the first copper busbar located in the first copper busbar slot. The second and fifth battery modules each have two identical third copper busbar slots. The two third copper busbar slots of each of the second and fifth battery modules are arranged in a straight line. Adjacent second battery modules and adjacent fifth battery modules are connected by the second copper busbar. The first and second copper busbars are connected to the positive terminal at one end and to the negative terminal at the other end.

9. The high-voltage battery pack for unmanned aerial vehicles according to claim 1, characterized in that: It also includes a control box, which is located on top of the third and sixth battery modules.

10. The high-voltage battery pack for unmanned aerial vehicles according to claim 1, characterized in that: It also includes a control box located above the third and sixth battery modules. The first row of modules includes a first battery module at the front, at least one second battery module in the middle, and a third battery module at the rear. The second row of modules includes a fourth battery module at the front, at least one fifth battery module in the middle, and a sixth battery module at the rear. The battery modules in the first row are connected in series, and the battery modules in the second row are connected in series. The first and second rows of modules are in parallel. The total positive terminal is defined as the first total positive terminal, and the control box also has a first total negative terminal. The total negative terminal on the sixth battery module is defined as the second total negative terminal, and the control box also has a second total positive terminal. Each battery module has a positive terminal and a negative terminal in the front-rear direction, and two adjacent battery modules connected in series are connected by a copper busbar.

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