Battery pack and two-wheeled electric vehicle with same

Abstract

The utility model discloses a battery pack and a two-wheeled electric vehicle with the battery pack, the battery pack is used for the two-wheeled electric vehicle and comprises a shell, a plurality of cold plates and a plurality of battery modules, and the shell defines an accommodating space; the multiple cold plates are sequentially arranged at intervals in the vertical direction and arranged in the containing space. Each battery module is arranged between two adjacent cold plates, each battery module comprises a plurality of VDA battery cells, and pole columns of the VDA battery cells are placed towards the upper side. According to the battery pack disclosed by the utility model, the plurality of battery modules are stacked, so that the energy density of the battery pack is relatively high. The pole columns of the VDA battery cells are placed towards the upper side, the orientation of the pole columns of the VDA battery cells is uniform, the upper end faces of the pole columns of the VDA battery cells are all attached to the cold plate, the cooling effect of the cold plate can be utilized, heat generated by the VDA battery cells can be rapidly taken away, the temperature of the battery is reduced, balanced transfer of the heat can be achieved, and the heat management efficiency is improved.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of batteries, and in particular to a battery pack and a two-wheeled electric vehicle having the same. Background Art

[0002] In the existing technology, two-wheeled electric vehicles have become the main mode of transportation for people to travel short distances. The power of two-wheeled electric vehicles mainly comes from on-board lithium-ion batteries, which mainly use cylindrical battery cells. The capacity of the battery cells is low and the heat dissipation effect is poor. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a battery pack having a high energy density and high thermal management efficiency.

[0004] The present invention also provides a two-wheeled electric vehicle, which includes the above-mentioned battery pack.

[0005] According to an embodiment of the present invention, the battery pack is used for a two-wheeled electric vehicle and includes a shell, multiple cold plates and multiple battery modules, the shell defines a storage space; the multiple cold plates are arranged in sequence along the up and down directions and are arranged in the storage space; each battery module is arranged between two adjacent cold plates, and the battery module includes multiple VDA battery cells, and the poles of the VDA battery cells are placed facing upward.

[0006] According to the battery pack of the present invention, each battery module is positioned between two adjacent cold plates arranged vertically and spaced apart within a storage space. The battery modules comprise multiple VDA cells, and the stacked arrangement of the multiple battery modules results in a higher energy density. Furthermore, the VDA cells are positioned with their poles facing upward, their poles are oriented in a relatively uniform manner, and their upper end surfaces are aligned with the cold plates. The cooling effect of the cold plates can be utilized to quickly remove heat generated by the VDA cells, reducing battery temperature, facilitating balanced heat transfer, and improving thermal management efficiency.

[0007] In some embodiments of the present invention, the shell includes a shell body and a cover plate, the upper end of the shell body is open; and the cover plate is arranged at the open end of the shell body.

[0008] In some embodiments of the present invention, the shell body includes a bottom plate and a plurality of side plates, the lower ends of the plurality of side plates are connected to the bottom plate, and the cold plate is fixedly connected to the plurality of side plates.

[0009] In some embodiments of the present invention, the cold plate and each of the side plates are connected via fasteners.

[0010] In some embodiments of the present invention, a flow channel is provided in the cold plate, and a heat exchange medium flows through the flow channel.

[0011] In some embodiments of the present invention, a water pipe is provided between two adjacent cold plates in the vertical direction, and the water pipe connects the flow channels of the two adjacent cold plates.

[0012] In some embodiments of the present invention, the water pipe extends in an up-down direction, and both ends of the water pipe in an axial direction are respectively connected to two adjacent cold plates in the up-down direction.

[0013] In some embodiments of the present invention, the battery pack further includes a water inlet nozzle and a water outlet nozzle. In the up-down direction, the water inlet nozzle is provided on one of the uppermost or lowermost cold plates and is connected to the flow channel, so as to input heat exchange medium into the flow channel; in the up-down direction, the water outlet nozzle is provided on the other of the uppermost or lowermost cold plates and is connected to the flow channel, so as to allow the flow channel to flow out heat exchange medium to the outside.

[0014] In some embodiments of the present invention, an insulating layer is provided on the upper and lower end surfaces of the cold plate.

[0015] The two-wheeled electric vehicle according to the embodiment of the present invention includes the above-mentioned battery pack.

[0016] According to an embodiment of the two-wheeled electric vehicle of the present invention, each battery module is positioned between two adjacent cold plates spaced vertically and arranged within a storage space. The battery modules comprise multiple VDA cells, and the stacked arrangement of the multiple battery modules results in a higher energy density for the battery pack. Furthermore, the poles of the VDA cells are positioned upward, with the poles oriented in a relatively uniform direction. The upper end surfaces of the poles of the VDA cells are all in contact with the cold plates, allowing the cooling effect of the cold plates to quickly dissipate heat generated by the VDA cells, lowering battery temperature, facilitating balanced heat transfer, and improving thermal management efficiency.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is an exploded view of a battery pack according to an embodiment of the present utility model;

[0020] Figure 2is a three-dimensional diagram of a battery module and a portion of a cold plate of a battery pack according to an embodiment of the present invention;

[0021] Figure 3 It is a three-dimensional diagram of the cold plate, water inlet nozzle and water outlet nozzle of the battery pack according to an embodiment of the present utility model.

[0022] Reference numerals:

[0023] 100. Battery pack;

[0024] 1. Shell; 11. Shell body; 111. Bottom plate; 112. Side plate; 12. Cover plate; 13. Accommodation space;

[0025] 2. Cold plate; 21. Water pipe; 22. Fasteners;

[0026] 3. Battery module; 31. VDA battery cell; 32. Terminal;

[0027] 4. Water inlet spout; 5. Water outlet spout. DETAILED DESCRIPTION

[0028] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0030] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0031] Reference below Figure 1-Figure 3 A battery pack 100 according to an embodiment of the present invention is described.

[0032] like Figure 1 As shown, a battery pack 100 according to an embodiment of the present invention is used in a two-wheeled electric vehicle and includes a housing 1 , a plurality of cold plates 2 and a plurality of battery modules 3 .

[0033] Specifically, if Figure 1 As shown, the shell 1 defines a receiving space 13 , and other components of the battery pack 100 can be arranged in the receiving space 13 . The shell 1 can protect the components in the receiving space 13 and prevent other components in the receiving space 13 from being damaged by external forces.

[0034] like Figure 1 and Figure 3 As shown, multiple cold plates 2 are arranged in the vertical direction (such as Figure 1 The battery modules 3 are arranged in sequence in the upper and lower directions as shown in the figure and are arranged in the accommodating space 13. Each battery module 3 is arranged between two adjacent cold plates 2. The cold plate 2 can effectively absorb the heat emitted by the battery module 3 and take away the heat generated by the battery module 3, thereby achieving effective heat dissipation and ensuring that the battery module 3 operates within a suitable temperature range. The heat dissipation effect of the cold plate 2 on each battery module 3 is relatively uniform.

[0035] like Figure 1 and Figure 2 As shown, the battery module 3 includes multiple VDA (Verband der Automobi lindustrie, German Association of the Automotive Industry) cells 31 (which adhere to the standard specifications set by the German Association of the Automotive Industry). These cells have a high energy density, enabling longer driving range and faster charging. Furthermore, due to their use of advanced battery materials and manufacturing processes, the VDA cells 31 have a relatively long service life. VDA cells 31 are widely used in electric vehicles, electric buses, electric logistics vehicles, and other devices requiring high energy storage and fast charging.

[0036] At this time, multiple battery modules 3 are stacked, and the energy density of the battery pack 100 is relatively high.

[0037] The poles 32 of the VDA cells 31 are positioned upward, facilitating the wiring harness layout for the high-voltage connection and low-voltage sampling of the battery pack 100, making connections between the VDA cells 31 more convenient and direct. The poles 32 of the VDA cells 31 are now oriented in a relatively uniform manner, and the upper end surfaces of the poles 32 of the VDA cells 31 all align with the cold plate 2. The cooling effect of the cold plate 2 can be utilized to quickly remove heat generated by the VDA cells 31, reducing battery temperature, facilitating balanced heat transfer, and improving thermal management efficiency.

[0038] For example, the cold plate 2 is provided with structures adapted to the poles 32 , such as grooves, protrusions, etc., to ensure close contact between the cold plate 2 and the poles 32 .

[0039] According to the battery pack 100 of the present embodiment, each battery module 3 is positioned between two adjacent cold plates 2 that are spaced apart vertically and disposed within the storage space 13. The battery modules 3 include multiple VDA cells 31, and the multiple battery modules 3 are stacked. This results in a high energy density for the battery pack 100. Furthermore, the poles 32 of the VDA cells 31 are positioned upward, with the poles 32 of the VDA cells 31 oriented in a relatively uniform manner. The upper end surfaces of the poles 32 of the VDA cells 31 all align with the cold plates 2. The cooling effect of the cold plates 2 can be utilized to quickly remove heat generated by the VDA cells 31, reducing battery temperature, facilitating balanced heat transfer, and improving thermal management efficiency.

[0040] In some embodiments of the present invention, Figure 1 As shown, the shell 1 includes a shell body 11 and a cover plate 12. The upper end of the shell body 11 is open, and multiple cold plates 2 and multiple battery modules 3 can be loaded into the accommodating space 13 through the opening at the upper end of the shell body 11. The cover plate 12 is arranged at the opening of the shell body 11, which can effectively block the intrusion of harmful substances such as moisture, dust, corrosive substances, etc. from the outside, thereby protecting the VDA battery cells 31, electrical modules, cooling modules and other key components inside the battery pack 100 from damage. In addition, the shell body 11 and the cover plate 12 have a certain degree of hardness and rigidity, which can provide stable external support for the battery pack 100 and prevent the battery pack 100 from deformation or breakage during use. When the battery pack 100 is subjected to external impact, the shell 1 can disperse and absorb energy, protecting the battery modules 3 inside the battery pack 100 from damage, thereby reducing the risk of accidents.

[0041] Furthermore, if Figure 1As shown, the housing 11 includes a bottom plate 111 and multiple side plates 112. The bottom plate 111 provides support for the cold plate 2 and battery module 3, increasing their stability. The lower ends of the multiple side plates 112 are connected to the bottom plate 111, and the cold plate 2 is fixedly connected to the multiple side plates 112. The cold plate 2 has multiple connection points with the housing 1, which can increase the position reliability of the cold plate 2, thereby improving the reliability of the cooling system of the battery pack 100.

[0042] Furthermore, if Figure 1 and Figure 2 As shown, the cold plate 2 and each side plate 112 are connected by fasteners 22 . The connection between the cold plate 2 and the side plates 112 is simple and reliable, and the cold plate 2 and the side plates 112 can be easily disassembled and assembled.

[0043] In some embodiments of the present invention, a flow channel is provided within the cold plate 2, through which a heat exchange medium flows. This heat exchange medium exchanges heat with the VDA cells 31, removing heat from the VDA cells 31 and enhancing the thermal safety of the battery pack 100. Furthermore, when the weather is cold outside, a higher temperature heat exchange medium can flow into the flow channel to raise the temperature of the VDA cells 31, preventing damage to the electrolyte within the VDA cells 31 and thus reducing the lifespan of the battery pack 100.

[0044] Furthermore, if Figure 2 and Figure 3 As shown, a water pipe 21 is provided between two adjacent cold plates 2 in the vertical direction, connecting the flow channels of the two adjacent cold plates 2. The water pipe 21 can connect multiple cold plates 2 into an integrated multi-layer cold plate 2, improving the stability of the heat exchange medium flow through the multiple cold plates 2 and enhancing the thermal management capabilities of the battery pack 100.

[0045] Furthermore, the water pipe 21 extends in the up-down direction, and the two ends of the axial direction of the water pipe 21 are respectively connected to the two adjacent cold plates 2 in the up-down direction. The water pipe 21 can support the two adjacent cold plates 2 in the up-down direction to a certain extent, increase the reliability of the position of the cold plate 2, and thereby increase the overall strength of the battery pack 100.

[0046] Furthermore, if Figure 1 and Figure 3 As shown, the battery pack 100 also includes a water inlet nozzle 4 and a water outlet nozzle 5. Along the up-down direction, the water inlet nozzle 4 is provided on one of the uppermost or lowermost cold plates 2 and is connected to the flow channel for inputting heat exchange medium into the flow channel; along the up-down direction, the water outlet nozzle 5 is provided on the other of the uppermost or lowermost cold plates 2 and is connected to the flow channel for the flow channel to discharge heat exchange medium to the outside, so as to realize two circulations of heat exchange medium from top to bottom and from bottom to top in multiple cold plates 2.

[0047] When the temperature of the battery module 3 is high, the water inlet nozzle 4 introduces a heat exchange medium with a lower temperature into the flow channel. The temperature of the heat exchange medium in the flow channel is low, and the heat exchange plate transfers the cold of the heat exchange medium in the flow channel to the VDA battery cell 31, and transfers the heat of the VDA battery cell 31 to the heat exchange medium, thereby realizing heat exchange between the heat exchange medium and the VDA battery cell 31. At this time, the heat exchange medium with a higher temperature flows out of the cold plate 2 through the water outlet nozzle 5; when the external ambient temperature is low, the temperature of the VDA battery cell 31 is low, and the water inlet nozzle 4 introduces a heat exchange medium with a higher temperature into the flow channel. The temperature of the heat exchange medium in the flow channel is high, and the heat exchange plate transfers the heat of the heat exchange medium in the flow channel to the VDA battery cell 31, and transfers the cold of the VDA battery cell 31 to the heat exchange medium, thereby realizing heat exchange between the heat exchange medium and the VDA battery cell 31. At this time, the heat exchange medium with a lower temperature flows out of the cold plate 2 through the water outlet nozzle 5.

[0048] When the battery module 3 is used in a vehicle, the water inlet nozzle 4 and the water outlet nozzle 5 are respectively connected to the intercooler on the vehicle. The higher temperature heat exchange medium flowing out of the water outlet nozzle 5 is finally returned to the intercooler on the vehicle through the pipeline for cooling, thereby circulating the heat exchange medium.

[0049] In some embodiments of the present invention, an insulating layer is provided on the upper and lower end surfaces of the cold plate 2 to achieve insulation between the cold plate 2 and the VDA battery cells 31 and avoid short circuiting of the battery module 3 .

[0050] Furthermore, the insulating layer is an insulating varnish layer. The insulating varnish can maintain insulation even in high-temperature environments, maintaining insulation between the VDA cell 31 and the cold plate 2 even after the VDA cell 31 heats up. Furthermore, the insulating varnish has excellent insulation properties, providing a good insulation effect between the VDA cell 31 and the cold plate 2.

[0051] The two-wheeled electric vehicle according to the embodiment of the present invention includes the battery pack 100 described above.

[0052] According to the two-wheeled electric vehicle of the present invention, each battery module 3 is disposed between two adjacent cold plates 2 that are spaced apart in the vertical direction and disposed within the storage space 13. The battery modules 3 include multiple VDA cells 31. Multiple battery modules 3 are stacked, resulting in a high energy density for the battery pack 100. Furthermore, the poles 32 of the VDA cells 31 are positioned upward, with the poles 32 of the VDA cells 31 oriented in a relatively uniform direction. The upper end surfaces of the poles 32 of the VDA cells 31 are all in contact with the cold plates 2. The cooling effect of the cold plates 2 can be utilized to quickly remove heat generated by the VDA cells 31, reducing battery temperature, facilitating balanced heat transfer, and improving thermal management efficiency.

[0053] Other structures and operations of the battery pack 100 and the two-wheeled electric vehicle having the same according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0054] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0055] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that: For two-wheeled electric vehicles and comprising: a housing defining a receiving space; A plurality of cold plates, the plurality of cold plates being arranged in sequence and spaced apart in the vertical direction and disposed in the accommodation space; A plurality of battery modules are provided, each of the battery modules is arranged between two adjacent cold plates, the battery module comprises a plurality of VDA cells, and the poles of the VDA cells are placed upward.

2. The battery pack according to claim 1, wherein: The housing comprises: a shell body, wherein the upper end of the shell body is open; A cover plate is arranged at the opening of the shell body.

3. The battery pack according to claim 2, wherein: The shell body comprises: base plate; A plurality of side plates are provided, wherein lower ends of the plurality of side plates are connected to the bottom plate, and the cold plate is fixedly connected to the plurality of side plates.

4. The battery pack according to claim 3, wherein: The cold plate and each of the side plates are connected via fasteners.

5. The battery pack according to claim 1, wherein: A flow channel is provided in the cold plate, and a heat exchange medium flows in the flow channel.

6. The battery pack according to claim 5, characterized in that: A water pipe is provided between two adjacent cold plates in the vertical direction, and the water pipe connects the flow channels of the two adjacent cold plates.

7. The battery pack according to claim 6, characterized in that: The water pipe extends in an up-down direction, and along the up-down direction, two ends of the water pipe in an axial direction are respectively connected to two adjacent cold plates.

8. The battery pack according to claim 5, characterized in that: Also includes: a water inlet nozzle, arranged on one of the uppermost or lowermost cold plates in the vertical direction and connected to the flow channel, for inputting heat exchange medium into the flow channel; A water outlet nozzle is provided on the other of the uppermost or lowermost cold plates along the up-down direction and is communicated with the flow channel, so as to allow the flow channel to discharge heat exchange medium to the outside.

9. The battery pack according to claim 1, wherein: The upper and lower end surfaces of the cold plate are provided with insulation layers.

10. A two-wheeled electric vehicle, characterized in that: include: The battery pack according to any one of claims 1 to 9.

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