Battery pack and electric road roller

Abstract

The utility model provides a battery pack and an electric road roller, and relates to the technical field of batteries. The battery pack comprises a frame which comprises two first plate bodies oppositely arranged along a first direction and two second plate bodies oppositely arranged along a second direction; the two first plate bodies and the two second plate bodies are connected and define a containing space, and an opening is formed in at least one side of the frame in the third direction. The plurality of battery modules are independently arranged and are arranged in the accommodating space side by side along the second direction; the battery module is arranged in the accommodating space along a third direction through the opening; any battery module is detachably connected with the first plate body. According to the battery pack provided by the invention, any one or more battery modules can be replaced without replacing the whole battery or the whole pack, disassembling and assembling the battery bin frame and other batteries which do not need to be replaced, so that the battery replacement flexibility is improved, and the battery replacement efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a battery pack and an electric road roller. Background Technology

[0002] The battery capacity of an electric road roller directly affects its range.

[0003] In existing technologies, on the one hand, the battery compartment space is difficult to optimize due to the structural design of electric road rollers; on the other hand, the current coverage of charging piles is low, especially in newly built construction sites where there are almost no charging piles, and the charging efficiency is difficult to meet the demand. Therefore, battery swapping has become the key to breaking through the technical bottleneck.

[0004] However, the existing technology for electric rollers has low battery replacement flexibility and cannot achieve independent battery replacement for all battery modules, affecting the needs of different customer groups. Utility Model Content

[0005] In view of the above problems, this application provides a battery pack and an electric road roller to solve the problem that the battery replacement flexibility of the electric road roller in the prior art is low and that not all battery modules can be replaced independently.

[0006] To achieve the above objectives, the embodiments of this application provide the following technical solutions:

[0007] A first aspect of this application provides a battery pack, including:

[0008] The frame includes two first plates arranged opposite each other along a first direction and two second plates arranged opposite each other along a second direction; the two first plates and the two second plates are connected and enclosed to form an accommodating space, and an opening is formed on at least one side of the frame along a third direction;

[0009] Multiple battery modules, which are independently arranged, are built side by side into the receiving space along the second direction; the battery modules are inserted into the receiving space through an opening along the third direction.

[0010] Any battery module can be detachably connected to the first plate.

[0011] In one possible implementation, a first mounting hole is provided on the first plate; a second mounting hole is provided on the side of the battery module facing the first plate; the first mounting hole and the second mounting hole are arranged opposite to each other along a first direction;

[0012] The first connector has one end passing through the first mounting hole and threadedly engaging with the second mounting hole.

[0013] In one possible implementation, a gap is formed between two adjacent battery modules along a second direction.

[0014] In one possible implementation, the battery module includes two first surfaces disposed opposite to each other along a first direction, two second surfaces disposed opposite to each other along a second direction, and two third surfaces disposed opposite to each other along a third direction; the area of ​​the second surface is greater than the area of ​​the first surface, and the area of ​​the second surface is greater than the area of ​​the third surface.

[0015] A gap is formed between the second surfaces of two adjacent battery modules;

[0016] And / or, the width dimension of the gap along the second direction is W, where W satisfies 10mm≤W≤15mm.

[0017] In one possible implementation, a first through hole is formed on the first plate;

[0018] And / or, a second through hole is provided on the second plate.

[0019] In one possible implementation, the first mounting hole is an oblong hole; the first mounting hole has a length dimension along a second direction and a width dimension along a third direction, the length dimension being greater than the width dimension.

[0020] In one possible implementation, the first plate extends to both sides in a second direction to form a first connecting portion;

[0021] The battery pack also includes a shock absorber, which is located on the side of the first connection portion away from the second plate in the first direction;

[0022] The battery pack also includes a second connector that connects the shock absorber to the first connector.

[0023] In one possible implementation, the second plate is bent on both sides in the first direction to form a second connecting portion, which is connected to the first plate; a reinforcing rib is provided on the side of the second plate away from the battery module, and the two ends of the reinforcing rib abut against the second connecting portion along the first direction.

[0024] In one possible implementation, multiple battery modules are connected in parallel.

[0025] A second aspect of this application provides an electric road roller, including: a frame, and a battery pack as described above, the battery pack being mounted on the frame.

[0026] The battery pack provided in this application embodiment has a frame that forms a receiving space and an opening. Multiple battery modules are arranged side by side in the receiving space along a second direction, and each battery module is detachably connected to a first plate in a first direction. When swapping batteries, it is only necessary to unfix the battery module to the first plate, and then pull the battery module to be swapped out from the receiving space through the opening. Then, the fully charged battery module is placed into the designated position in the receiving space through the opening, and then the battery module is fixed to the first plate, thereby completing the battery swap. In this process, it is not necessary to replace the entire battery / pack, nor is it necessary to disassemble the battery compartment frame and other batteries that do not need to be replaced. Any one or more battery modules can be replaced, which improves the flexibility and efficiency of battery swapping.

[0027] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions as described above, other technical problems that can be solved by the battery pack and electric roller provided by the embodiments of this application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific implementation. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 An assembly drawing of the battery pack and the frame of the electric road roller provided in an embodiment of this application;

[0030] Figure 2 A first perspective view of the battery pack provided in an embodiment of this application;

[0031] Figure 3 A second perspective view of the battery pack provided in an embodiment of this application;

[0032] Figure 4 A perspective view of the battery module of the battery pack provided in an embodiment of this application;

[0033] Figure 5 A first perspective view of the battery pack provided in an embodiment of this application, with all battery modules and the first connector hidden;

[0034] Figure 6 A second perspective view of the battery pack provided in an embodiment of this application, with all battery modules and the first connector hidden;

[0035] Figure 7 A first perspective view of the battery pack provided in an embodiment of this application, with the battery module and the first connector partially hidden;

[0036] Figure 8 A second perspective view of the battery pack provided in the embodiments of this application, after partially concealing the battery module and the first connector.

[0037] Explanation of reference numerals in the attached figures:

[0038] 10-Frame; 101-Accommodation space; 102-Opening; 103-Gap;

[0039] 11-First plate; 111-First mounting hole; 112-First through hole; 113-First connecting part;

[0040] 12-Second plate; 121-Second through hole; 122-Second connecting part; 123-Reinforcing rib;

[0041] 20 - Battery module; 201 - Second mounting hole; 21 - First surface; 22 - Second surface; 23 - Third surface;

[0042] 31-First connector; 32-Second connector; 33-Third connector; 34-Connector base;

[0043] 40 - Shock absorber;

[0044] 50-frame;

[0045] X - First direction; Y - Second direction; Z - Third direction. Detailed Implementation

[0046] First, those skilled in the art should understand that these embodiments are merely for explaining the technical principles of this application and are not intended to limit the scope of protection of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0047] Secondly, it should be noted that, in the description of the embodiments of this application, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0048] As described in the background section, electric road rollers in related technologies suffer from low battery replacement flexibility. The inventors have discovered that this problem arises because the battery swapping structures in related technologies can only replace the entire battery or the entire battery pack, or require the disassembly and reassembly of at least part of the battery compartment frame, or the disassembly and reassembly of other batteries that do not need to be replaced. They cannot replace one or more batteries at will. Therefore, it is not possible to replace all battery modules independently, resulting in low battery replacement flexibility and low battery replacement efficiency.

[0049] To address the aforementioned technical problems, this application provides a battery pack and an electric road roller. The battery pack includes: a frame comprising two first plates disposed opposite each other along a first direction, and two second plates disposed opposite each other along a second direction; the two first plates and the two second plates are connected and enclosed to form an accommodating space, and an opening is formed on at least one side of the frame along a third direction; a plurality of battery modules disposed independently of each other are arranged side by side and built into the accommodating space along the second direction; the battery modules are inserted into the accommodating space through the opening along the third direction; any battery module is detachably connected to the first plate. The battery pack provided in this application embodiment has a frame that forms a receiving space and an opening. Multiple battery modules are arranged side by side in the receiving space along a second direction, and each battery module is detachably connected to a first plate in a first direction. When swapping batteries, it is only necessary to unfix the battery module to the first plate, and then pull the battery module to be swapped out from the receiving space through the opening. Then, the fully charged battery module is placed into the designated position in the receiving space through the opening, and then the battery module is fixed to the first plate, thereby completing the battery swap. In this process, it is not necessary to replace the entire battery / pack, nor is it necessary to disassemble the battery compartment frame and other batteries that do not need to be replaced. Any one or more battery modules can be replaced, which improves the flexibility and efficiency of battery swapping.

[0050] To make the above-mentioned objectives, features, and advantages of the embodiments of this application more apparent and understandable, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0051] Please refer to Figures 1-8 The first aspect of this application provides a battery pack, including:

[0052] The frame 10 includes two first plates 11 arranged opposite each other along a first direction X, and two second plates 12 arranged opposite each other along a second direction Y; the two first plates 11 and the two second plates 12 are connected and enclosed to form an accommodating space 101, and an opening 102 is formed on at least one side of the frame 10 along a third direction Z.

[0053] Multiple battery modules 20, which are independently arranged, are installed side by side in the receiving space 101 along the second direction Y; the battery modules 20 are inserted into the receiving space 101 through the opening 102 along the third direction Z.

[0054] Any battery module 20 can be detachably connected to the first plate 11.

[0055] It should be noted that, in the embodiments of this application, please refer to... Figure 2 and Figure 4 As shown, "first direction" refers to the height direction of battery module 20; "second direction" refers to the width direction of battery module 20; "third direction" refers to the length direction of battery module 20; the first direction, the second direction and the third direction intersect each other.

[0056] In this embodiment of the application, please refer to Figure 1 As shown, the battery pack is installed in the front frame space of the electric roller. The battery pack mainly includes a frame 10 and multiple battery modules 20; please refer to... Figure 2 As shown, the frame 10 includes two first plates 11 and two second plates 12, wherein the two first plates 11 are arranged opposite each other along a first direction X, and the two second plates 12 are arranged opposite each other along a second direction Y. Please refer to [link to relevant documentation]. Figure 5 As shown, two first plates 11 and two second plates 12 are connected end to end and enclose a receiving space 101. The receiving space 101 is suitable for accommodating battery modules 20. Multiple battery modules 20 are arranged side by side along the second direction Y within the receiving space 101. The frame 10 forms an opening 102 on at least one side along the third direction Z. The dimensions of the opening 102 along the first direction X and along the second direction Y are adapted to the external dimensions of the battery modules 20. Please refer to the diagram. Figure 7 and Figure 8 As shown, during the battery swapping process, any one or more battery modules 20 to be swapped can be pulled out from the receiving space 101 through the opening 102, and any one or more fully charged battery modules 20 can be placed into the receiving space 101 through the opening 102.

[0057] In this embodiment, the frame 10 forms a receiving space 101 and an opening 102. Multiple battery modules 20 are arranged side by side in the receiving space 101 along the second direction Y, and each battery module 20 is detachably connected to the first plate 11 in the first direction X. When swapping batteries, it is only necessary to unfix the battery module 20 to the first plate 11, and then the battery module 20 to be swapped can be pulled out from the receiving space 101 through the opening 102. Then, the fully charged battery module 20 is placed into the designated position in the receiving space 101 through the opening 102, and then the battery module 20 is fixed to the first plate 11 to complete the battery swapping. In this process, it is not necessary to replace the entire battery / pack, nor is it necessary to disassemble the battery compartment frame and other batteries that do not need to be replaced. Any one or more battery modules 20 can be replaced, which improves the flexibility and efficiency of battery swapping.

[0058] Furthermore, the battery module 20 and the first plate 11 can be detachably connected by bolts and / or screws, and the battery module 20 and the first plate 11 can also be connected by a snap-fit ​​structure.

[0059] In one possible implementation, the first plate 11 is provided with a first mounting hole 111; the battery module 20 is provided with a second mounting hole 201 on the side facing the first plate 11; the first mounting hole 111 and the second mounting hole 201 are arranged opposite to each other along the first direction X.

[0060] The first connector 31 has one end passing through the first mounting hole 111 and threadedly engaging with the second mounting hole 201.

[0061] In this embodiment of the application, please refer to Figure 5 As shown, the first mounting hole 111 is provided through the first plate 11 along the first direction X; please refer to Figure 4 As shown, the battery module 20 has a second mounting hole 201 on the side facing the first plate 11 along the first direction X. The second mounting hole 201 is a threaded hole. The first mounting hole 111 and the second mounting hole 201 are arranged opposite to each other along the first direction X. The first connector 31 is a screw, which includes a screw head and a threaded shank. During the battery swapping process, after the battery module 20 is placed in the designated position in the receiving space 101, the threaded shank of the first connector 31 passes through the first mounting hole 111 and is threadedly engaged with the second mounting hole 201. The screw head of the first connector 31 abuts against the side of the first plate 11 away from the battery module 20 along the first direction X, thereby fixing the battery module 20 to the first plate 11 and enhancing the stability of the battery pack. When swapping batteries, the first connector 31 can be detached from the second mounting hole 201 by screwing it, and then the battery module 20 to be swapped can be pulled out from the receiving space 101.

[0062] In one possible implementation, a gap 103 is formed between two adjacent battery modules 20 along the second direction Y.

[0063] In this embodiment of the application, please refer to Figure 2 and Figure 3 As shown, multiple battery modules 20 are arranged side by side along the second direction Y in the accommodating space 101, and a gap 103 is formed between two adjacent battery modules 20 along the second direction Y, thereby providing an air duct for battery heat dissipation and enhancing the heat dissipation effect.

[0064] In one possible implementation, please see Figure 4 As shown, the battery module 20 includes two first surfaces 21 arranged opposite each other along a first direction X, two second surfaces 22 arranged opposite each other along a second direction Y, and two third surfaces 23 arranged opposite each other along a third direction Z; the area of ​​the second surface 22 is larger than the area of ​​the first surface 21, and the area of ​​the second surface 22 is larger than the area of ​​the third surface 23.

[0065] The second surfaces 22 of two adjacent battery modules 20 are spaced apart to form a gap 103;

[0066] And / or, the width dimension of the gap 103 along the second direction Y is W, where W satisfies 10mm≤W≤15mm.

[0067] In this embodiment, the second surface 22 is the side with the largest area of ​​the battery module 20. By making the second surfaces 22 of two adjacent battery modules 20 form a gap 103, the side with the largest area of ​​the battery module 20 faces the heat dissipation channel, thereby increasing the heat dissipation area of ​​the battery module 20 and improving the heat dissipation effect.

[0068] The width W of the gap 103 along the second direction Y cannot be too small, otherwise it will easily increase the flow resistance and make it difficult to form a stable air duct, resulting in a decrease in heat dissipation efficiency. Therefore, W must satisfy W≥10mm. Since the space in the front frame of the electric roller is limited, the width W of the gap 103 along the second direction Y cannot be too large, otherwise it will be impossible to ensure that the space is compact, resulting in a decrease in the battery capacity of the electric roller. Therefore, W must also satisfy W≤15mm.

[0069] In one possible implementation, please see Figure 2 and Figure 5 As shown, a first through hole 112 is provided on the first plate 11;

[0070] And / or, a second through hole 121 is provided on the second plate 12.

[0071] In this embodiment of the application, by opening a first through hole 112 on the first plate 11 and / or opening a second through hole 121 on the second plate 12, the frame 10 forms a hollow structure, which can reduce the weight of the whole machine and enhance the heat dissipation effect, thus improving the battery energy efficiency.

[0072] Further, please see Figure 2 and Figure 5 As shown, the first through hole 112 is connected to the gap 103, and the orthographic projection of the first through hole 112 along the first direction X at least partially covers the first surface 21; the orthographic projection of the second through hole 121 along the second direction Y at least partially covers the second surface 22, which is beneficial to enhance the heat dissipation effect.

[0073] In one possible implementation, the first mounting hole 111 is an oblong hole; the first mounting hole 111 has a length dimension along the second direction Y and a width dimension along the third direction Z, the length dimension being greater than the width dimension.

[0074] In this embodiment, by setting the first mounting hole 111 as an oblong hole, the threaded rod of the first connector 31 can be moved and adjusted in the second direction Y within the first mounting hole 111 during the assembly process, thereby adjusting the size of the gap 103 between the battery modules 20 as needed, thereby achieving the purpose of changing the heat dissipation effect.

[0075] In one possible implementation, please see Figure 2 and Figure 5 As shown, the first plate 11 extends to both sides in the second direction Y to form the first connecting portion 113;

[0076] The battery pack also includes a shock absorber 40, which is disposed on the side of the first connecting portion 113 away from the second plate 12 along the first direction X.

[0077] The battery pack also includes a second connector 32, which connects the shock absorber 40 to the first connector 113.

[0078] It should be noted that the second connecting member 32 includes a bolt and a nut, the first connecting part 113 has a third mounting hole (not shown in the figure), and the shock absorber 40 has a fourth mounting hole (not shown in the figure). Please refer to [link to relevant documentation]. Figure 2 and Figure 5As shown, the battery pack also includes a connecting seat 34, which is located on the side of the shock absorber 40 away from the first connecting portion 113 along the first direction X. The connecting seat 34 has a fifth mounting hole (not shown in the figure). During assembly, bolts pass through the third mounting hole, the fourth mounting hole and the fifth mounting hole in sequence and are threaded with nuts, thereby fixing the shock absorber 40 and the connecting seat 34 together to the bottom of the frame 10 through the second connecting member 32. The connecting seat 34 includes two connecting ears, which can be connected to the frame 50 by bolts and / or screws, thereby fixing the battery pack to the frame 50 and providing vibration damping through the shock absorber 40.

[0079] In this embodiment, since the main application of the road roller is to compact the road surface by generating high-frequency vibration through its working device - the vibrating wheel assembly, the equipment is always in high-frequency vibration. Therefore, by setting a shock absorber 40 at the bottom of the frame 10, the high-frequency vibration is absorbed by the shock absorber 40, thus avoiding the impact of vibration on the battery pack.

[0080] Furthermore, the damping component 40 can be a rubber damping block.

[0081] Furthermore, hoisting holes can be provided on the frame 10 to facilitate the overall hoisting of the frame 10.

[0082] In one possible implementation, please see Figure 5 As shown, the second plate 12 is bent on both sides in the first direction X to form a second connecting part 122, and the second connecting part 122 is connected to the first plate 11;

[0083] Please see Figure 5 As shown, the second plate 12 is provided with a reinforcing rib 123 on the side away from the battery module 20, and the two ends of the reinforcing rib 123 along the first direction X abut against the second connecting part 122.

[0084] In this embodiment, the second plate 12 is a sheet metal part. The second plate 12 is bent on both sides in the first direction X to form a second connecting part 122. By setting a reinforcing rib 123 on the side of the second plate 12 away from the battery module 20, the strength of the frame 10 and the battery pack is guaranteed.

[0085] Furthermore, the reinforcing rib 123 can be welded to the second plate 12.

[0086] Furthermore, the battery pack also includes a third connector 33, which connects the second connecting portion 122 to the first plate 11. The third connector 33 can be a screw connector or a bolt and nut connector. The second connecting portion 122 is formed by bending the second plate 12 on both sides in the first direction X, and the second connecting portion 122 is detachably connected to the first plate 11 through the third connector 33, thereby facilitating disassembly, inspection and maintenance.

[0087] In one possible implementation, multiple battery modules 20 are connected in parallel.

[0088] In this embodiment, multiple battery modules 20 are connected in parallel. Adding or removing battery modules 20 will not change the voltage or affect the overall function of the device, ensuring that each battery module 20 can be replaced independently.

[0089] A second aspect of this application provides an electric road roller, including: a frame 50, and a battery pack as described above.

[0090] Since the electric roller in this embodiment includes the battery pack described in any of the above embodiments, the electric roller includes the battery pack and the beneficial effects, which will not be elaborated further in this embodiment.

[0091] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0092] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery pack, characterized in that, include: The frame includes two first plates arranged opposite each other along a first direction and two second plates arranged opposite each other along a second direction; the two first plates and the two second plates are connected and enclosed to form an accommodating space, and an opening is formed on at least one side of the frame along a third direction; Multiple battery modules, independently configured, are arranged side-by-side within the receiving space along a second direction; the battery modules are inserted into the receiving space via the opening along a third direction. Any of the battery modules is detachably connected to the first plate.

2. The battery pack according to claim 1, characterized in that, The first plate has a first mounting hole; the battery module has a second mounting hole on the side facing the first plate; the first mounting hole and the second mounting hole are arranged opposite to each other along a first direction; A first connector, one end of which passes through the first mounting hole and is threaded into the second mounting hole.

3. The battery pack according to claim 1, characterized in that, A gap is formed between two adjacent battery modules along the second direction.

4. The battery pack according to claim 3, characterized in that, The battery module includes two first surfaces arranged opposite each other along a first direction, two second surfaces arranged opposite each other along a second direction, and two third surfaces arranged opposite each other along a third direction; the area of ​​the second surface is greater than the area of ​​the first surface, and the area of ​​the second surface is greater than the area of ​​the third surface. The gap is formed by the second surface spacing between two adjacent battery modules; And / or, the width dimension of the gap along the second direction is W, where W satisfies 10mm≤W≤15mm.

5. The battery pack according to claim 1, characterized in that, The first plate has a first through hole; And / or, a second through hole is provided on the second plate.

6. The battery pack according to claim 2, characterized in that, The first mounting hole is an oblong hole; the first mounting hole has a length dimension along a second direction and a width dimension along a third direction, wherein the length dimension is greater than the width dimension.

7. The battery pack according to claim 1, characterized in that, The first plate extends to both sides in a second direction to form a first connecting portion; The battery pack also includes a shock absorber, which is disposed on the side of the first connecting portion away from the second plate along the first direction; The battery pack also includes a second connector that connects the shock absorber to the first connector.

8. The battery pack according to claim 1, characterized in that, The second plate is bent on both sides in the first direction to form a second connecting part, which is connected to the first plate; a reinforcing rib is provided on the side of the second plate away from the battery module, and the two ends of the reinforcing rib abut against the second connecting part along the first direction.

9. The battery pack according to any one of claims 1-8, characterized in that, The battery modules are connected in parallel.

10. An electric road roller, characterized in that, include: A vehicle frame, and a battery pack as described in any one of claims 1 to 9, the battery pack being mounted on the vehicle frame.

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