Battery cell assembly, battery and electric two-wheeled vehicle

Abstract

The utility model discloses a battery cell subassembly, battery and electric two-wheeled vehicle relates to electric two-wheeled vehicle technical field, wherein the battery cell subassembly includes casing, mount and a plurality of battery cells, the casing forms the accommodation cavity, the top of accommodation cavity is open setting, mount is connected to the top of casing, a plurality of battery cells are accommodated in the accommodation cavity side by side, the battery cell is equipped with the battery cell. The top end of the battery cell is connected to the mounting rack and is borne on the shell through the mounting rack; according to the battery cell assembly, the battery and the electric two-wheeled vehicle disclosed by the utility model, bending deformation and even breakage caused by overlarge pressure borne by the bottom end of the battery cell can be prevented, so that the service life of the battery cell is longer.

Description

Technical Field

[0001] The utility model relates to the technical field of electric two-wheel vehicles, in particular to a battery cell assembly, a battery and an electric two-wheel vehicle. Background Art

[0002] In recent years, electric two-wheel vehicles have become one of the main means of transportation for the public's daily travel. The power source of an electric two-wheel vehicle is a battery, which generally includes a box body and a battery cell assembly. The battery cell assembly is accommodated in the box body. The battery cell assembly includes a mounting rack and a plurality of battery cells arranged on the mounting rack. Some batteries will also be provided with components such as a BMS module on the mounting rack. In the prior art, the battery cell assembly is directly placed in the box body and fixed by fixing parts. In this way, the bottom end of the battery cell bears the weight of the entire battery cell assembly, and the pressure borne by the bottom end of the battery cell is relatively large. During long-term use, the bottom end of the battery cell will be bent, deformed or even broken, resulting in a short service life of the battery cell. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides a battery cell assembly, which can prevent the bottom end of the battery cell from being subjected to excessive pressure and causing bending, deformation or even breakage, thereby making the battery cell have a longer service life.

[0004] The utility model also provides a battery having the above battery cell assembly.

[0005] The utility model also provides an electric two-wheel vehicle having the above battery.

[0006] According to the battery cell assembly of the first aspect embodiment of the utility model, it includes a housing, a mounting rack and a plurality of battery cells. The housing forms a receiving cavity, the top end of the receiving cavity is open, the mounting rack is connected to the top end of the housing, and the plurality of battery cells are arranged side by side in the receiving cavity. The top end of the battery cell is connected to the mounting rack so as to be carried on the housing through the mounting rack.

[0007] The battery cell assembly according to the embodiment of the utility model has at least the following beneficial effects:

[0008] In the present utility model, when assembling the battery, the tops of multiple battery cells are connected to the mounting frame, then the multiple battery cells are placed in the accommodating cavity of the housing, and then the mounting frame is connected to the top end of the housing to assemble a battery cell assembly, and finally the battery cell assembly is installed in the battery box. Compared with the existing battery, the overall weight of the battery cell assembly is borne by the bottom ends of the battery cells. In the battery cell assembly of the present utility model, the multiple battery cells are carried on the housing through the mounting frame at their tops, and then carried on the battery box through the housing. Thus, the bottom ends of the battery cells do not need to bear the overall weight of the battery cell assembly, and further, it is possible to prevent the bottom ends of the battery cells from being bent or even broken due to excessive pressure, thereby making the battery cells have a longer service life.

[0009] According to some embodiments of the present utility model, fixing parts are respectively provided at four corner positions of the top end of the housing, convex parts are correspondingly provided at four corner positions of the mounting frame, and the convex parts and the fixing parts are connected by fasteners.

[0010] According to some embodiments of the present utility model, the fixing part includes two perpendicular fixing plates. The end face of one of the fixing plates is attached to the outer side wall of the housing and is connected to the housing by fasteners, and the end face of the other fixing plate is attached to the bottom surface of the convex part and is connected to the convex part by fasteners.

[0011] According to some embodiments of the present utility model, a clamping groove is provided at the top end of the side wall of the housing, and the mounting frame is provided with a clamping structure, and the clamping structure and the clamping groove are clamped with each other.

[0012] According to some embodiments of the present utility model, there are multiple clamping grooves. The clamping structure includes multiple first clamping members and multiple second clamping members. The multiple first clamping members are respectively provided on both sides of the mounting frame along a first horizontal direction. The first clamping member is located between two adjacent convex parts, and the first clamping member is clamped in the clamping groove. The multiple second clamping members are respectively provided on both sides of the mounting frame along a second horizontal direction. The second clamping member is located between two adjacent convex parts, and the second clamping member is clamped in the clamping groove. Among them, the first horizontal direction is perpendicular to the second horizontal direction.

[0013] According to some embodiments of the present utility model, the first clamping member includes a first connecting part and a first clamping part. The first connecting part is located outside the housing, and the first clamping part is connected to the first connecting part and is clamped in the clamping groove. The second clamping member includes a second connecting part and a second clamping part. The first connecting part is located inside the housing, and the second clamping part is connected to the second connecting part and is clamped in the clamping groove.

[0014] According to some embodiments of the present utility model, the mounting frame abuts against the top surface of the side wall of the housing.

[0015] According to some embodiments of the present utility model, a plurality of support columns are provided at the top of the mounting frame. The battery cell assembly further includes a BMS module, and the BMS module is connected to the top of the support columns. An annular insulating plate surrounding the BMS module is provided at the top of the mounting frame.

[0016] The battery according to the embodiment of the second aspect of the present utility model includes the battery cell assembly described in the embodiment of the first aspect above.

[0017] The battery according to the embodiment of the present utility model has at least the following beneficial effects:

[0018] By adopting the battery cell assembly of the embodiment of the first aspect of the present utility model, compared with the existing battery, in which the overall weight of the battery cell assembly is borne by the bottom end of the battery cell, in the battery cell assembly of the present utility model, a plurality of battery cells are carried on the housing through the mounting frame at their top ends, and then carried on the battery box through the housing. In this way, the bottom end of the battery cell does not need to bear the overall weight of the battery cell assembly, thereby preventing the bottom end of the battery cell from being subjected to excessive pressure and causing bending deformation or even fracture, so that the battery cell has a longer service life.

[0019] The electric two-wheeler according to the embodiment of the third aspect of the present utility model includes the battery described in the embodiment of the second aspect above.

[0020] The electric two-wheeler according to the embodiment of the present utility model has at least the following beneficial effects:

[0021] By adopting the battery described in the embodiment of the second aspect of the present utility model, compared with the existing battery, in which the overall weight of the battery cell assembly is borne by the bottom end of the battery cell, in the battery cell assembly of the present utility model, a plurality of battery cells are carried on the housing through the mounting frame at their top ends, and then carried on the battery box through the housing. In this way, the bottom end of the battery cell does not need to bear the overall weight of the battery cell assembly, thereby preventing the bottom end of the battery cell from being subjected to excessive pressure and causing bending deformation or even fracture, so that the battery cell has a longer service life.

[0022] The additional aspects and advantages of the present utility model will be partially given in the following description, and some advantages will become obvious from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following further describes the present utility model in conjunction with the drawings and embodiments, where:

[0024] Figure 1 is a schematic structural diagram of the battery cell assembly according to the embodiment of the present utility model;

[0025] Figure 2 is Figure 1 a schematic structural diagram of the housing in

[0026] Figure 3 is Figure 1 Schematic structural diagram after removing the housing;

[0027] Figure 4 is Figure 1 Enlarged view of part A in

[0028] Figure 5 is Figure 1 Enlarged view of part B in

[0029] Reference numerals in the drawings:

[0030] Housing 100; receiving cavity 101; fixing part 102; fixing plate 103; card slot 104;

[0031] Mounting bracket 200; convex part 201; clamping structure 202; first clamping part 203; second clamping part 204; first connecting part 205; first buckle part 206; second connecting part 207; second buckle part 208; support column 209; annular insulating plate 210;

[0032] Electric core 300;

[0033] BMS module 400. Specific embodiments

[0034] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0035] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up and down is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0036] In the description of the present invention, "a plurality of" means two or more. If the first and second are described, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0037] In the description of the present utility model, unless otherwise clearly defined, terms such as "arrangement", "installation", "connection", etc. should be understood in a broad sense, and those skilled in the relevant technical field can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0038] Reference is made below to Figures 1 to 5 describe a battery cell assembly, a battery, and an electric two-wheeler according to an embodiment of the present utility model.

[0039] The battery cell assembly according to the first aspect embodiment of the present utility model, as Figures 1 to 3 shown, includes a housing 100, a mounting frame 200, and a plurality of battery cells 300.

[0040] Among them, the housing 100 can be square, the housing 100 is formed with a receiving cavity 101, the top end of the receiving cavity 101 is open, and the housing 100 can be made of an electrically insulating material to reduce the risk of electric leakage and short circuit. Of course, the housing 100 can also be made of other suitable materials.

[0041] The mounting frame 200 is connected to the top end of the housing 100. The mounting frame 200 can be connected to the top end of the housing 100 by fasteners, snap connections, or other suitable means. The mounting frame 200 can cover the top end of the receiving cavity 101.

[0042] A plurality of battery cells 300 are accommodated side by side in the receiving cavity 101. The top end of the battery cell 300 is connected to the mounting frame 200. For example, the mounting frame 200 can be provided with a plurality of busbars, the top end of the battery cell 300 can be provided with tabs, the tabs are connected to the busbars, the bottom end of the battery cell 300 can be in contact with the bottom end of the receiving cavity 101 of the housing 100, or there can be a gap reserved. The battery cell 300 is carried on the mounting frame 200 and indirectly carried on the housing 100 through the mounting frame 200.

[0043] In the present utility model, when assembling the battery, the top ends of a plurality of battery cells 300 are connected to the mounting frame 200, then the plurality of battery cells 300 are placed in the receiving cavity 101 of the housing 100, and then the mounting frame 200 is connected to the top end of the housing 100 to assemble the battery cell assembly. Finally, the battery cell assembly is installed in the battery box.

[0044] Compared with existing batteries, in which the overall weight of the battery cell assembly is borne by the bottom end of the battery cell 300, in the battery cell assembly of the present utility model, a plurality of battery cells 300 are carried on the housing 100 through the mounting frame 200 at their top ends, and then carried on the battery box through the housing 100. In this way, the bottom end of the battery cell 300 does not need to bear the overall weight of the battery cell assembly, thereby preventing the bottom end of the battery cell 300 from being subjected to excessive pressure and causing bending deformation or even fracture, so that the battery cell 300 has a longer service life.

[0045] Reference is made toFigures 1 to 3 As shown, in some embodiments of the present utility model, fixing parts 102 are respectively provided at four corner positions at the top end of the side wall of the housing 100, convex parts 201 are correspondingly provided at four corner positions of the mounting bracket 200, and the convex parts 201 and the fixing parts 102 are connected by fasteners. In this embodiment, the detachable connection between the mounting bracket 200 and the housing 100 can be realized through the fastener connection between the four convex parts 201 of the mounting bracket 200 and the four fixing parts 102 of the housing 100. The connection is relatively convenient. Moreover, the four convex parts 201 are respectively located at the four corner positions of the mounting bracket 200, and the four fixing parts 102 are respectively located at the four corner positions at the top end of the housing 100. Such a setting makes the connection between the mounting bracket 200 and the housing 100 more stable and reduces the vibration of the mounting bracket 200.

[0046] It should be noted that in some other embodiments of the present utility model, the fixing parts 102 can also be provided at other positions of the housing 100, and the convex parts 201 can also be provided at other positions of the mounting bracket 200.

[0047] Reference Figure 1 and Figure 2 As shown, in some embodiments of the present utility model, the fixing part 102 includes two fixing plates 103 that are perpendicular to each other. The end face of one of the fixing plates 103 is attached to the outer side wall of the housing 100 and is connected to the housing 100 by fasteners, and the end face of the other fixing plate 103 is attached to the bottom surface of the convex part 201 and is connected to the convex part 201 by fasteners. In this embodiment, the fixing part 102 is provided as two connected and perpendicular fixing plates 103, and the plate surfaces of the two fixing plates 103 are respectively attached to the outer side wall of the housing 100 and the bottom surface of the convex part 201. In this way, not only is it more convenient to install the fasteners, but also the overall structural strength of the fixing part 102 is higher, it is less likely to be damaged, and the service life is longer.

[0048] Reference Figures 1 to 5 As shown, in some embodiments of the present utility model, a card slot 104 is provided at the top end of the side wall of the housing 100, and the mounting bracket 200 is provided with a clamping structure 202, and the clamping structure 202 and the card slot 104 are clamped with each other. In addition to being connected by fasteners between the fixing part 102 and the convex part 201, the mounting bracket 200 and the housing 100 are also clamped with each other through the cooperation of the clamping structure 202 and the card slot 104. In this way, the connection between the mounting bracket 200 and the housing 100 is made more stable.

[0049] Reference Figures 1 to 5As shown, in some embodiments of the present utility model, there are multiple card slots 104. The clamping structure 202 includes multiple first clamping members 203 and multiple second clamping members 204. The multiple first clamping members 203 are respectively arranged on both sides of the mounting bracket 200 along the first horizontal direction. The first clamping member 203 is located between two adjacent convex portions 201, and the first clamping member 203 is clamped in the card slot 104. The multiple second clamping members 204 are respectively arranged on both sides of the mounting bracket 200 along the second horizontal direction. The second clamping member 204 is located between two adjacent convex portions 201, and the second clamping member 204 is clamped in the card slot 104. Among them, the first horizontal direction is perpendicular to the second horizontal direction. That is, clamping members are provided on all four sides of the mounting bracket 200. In this way, the clamping between the mounting bracket 200 and the housing 100 is more stable. Moreover, the clamping member is located between two adjacent convex portions 201. For example, it can be located at the middle position of the top end of the side wall of the housing 100. In this way, in addition to the connection between the corner position of the mounting bracket 200 and the corner position of the housing 100, the position near the middle of the side wall of the mounting bracket 200 is also connected to the position near the middle of the side wall of the housing 100, thereby making the connection between the mounting bracket 200 and the housing 100 more stable.

[0050] Reference Figure 4 and Figure 5 As shown, in some embodiments of the present utility model, the first clamping member 203 includes a first connecting portion 205 and a first clamping portion 206. The first connecting portion 205 is located outside the housing 100, and the first clamping portion 206 is connected to the first connecting portion 205 and is clamped in the card slot 104. The second clamping member 204 includes a second connecting portion 207 and a second clamping portion 208. The second connecting portion 207 is located inside the housing 100, and the second clamping portion 208 is connected to the second connecting portion 207 and is clamped in the card slot 104.

[0051] Compared with the situation where all the clamping components are located outside the housing 100, in this embodiment, the second connecting portion 207 of the second clamping component 204 is located inside the housing 100. The battery cell 300 can limit the second connecting portion 207, preventing the second connecting portion 207 from deforming and swinging inward with too large an amplitude. In this way, the second clamping portion 208 on the second connecting portion 207 can be tightly clamped in the corresponding card slot 104, making the connection between the mounting bracket 200 and the housing 100 more stable. Compared with the situation where all the clamping components are located inside the housing 100, in this embodiment, the first connecting portion 205 of the first clamping component 203 is located outside the housing 100. Thus, it is convenient for the first connecting portion 205 to swing outward. When it is necessary to separate the mounting bracket 200 from the housing 100, the first connecting portion 205 can be first swung outward to separate the first clamping portion 206 on the first connecting portion 205 from the corresponding card slot 104, and then the second clamping portion 208 on the second connecting portion 207 can be separated from the corresponding card slot 104. It is more convenient, time-saving and labor-saving to disassemble the mounting bracket 200. In this embodiment, the first clamping component 203 and the second clamping component 204 are arranged in this way, which not only ensures the firm clamping of the mounting bracket 200 and the housing 100, but also facilitates the disassembly of the mounting bracket 200, with better practicability.

[0052] Reference Figure 5 As shown, in some embodiments of the present utility model, the mounting bracket 200 abuts against the top surface of the side wall of the housing 100. In this way, the overall weight of the mounting bracket 200 and the battery cell 300 is directly borne by the mounting bracket 200 itself on the side wall of the housing 100, rather than being borne by the convex portion 201 or the clamping structure 202 on the side wall of the housing 100. Thus, it can be avoided that the convex portion 201 or the clamping structure 202 is damaged due to excessive acting force.

[0053] Reference Figure 1 and Figure 3As shown in the figure, in some embodiments of the present invention, multiple support columns 209 are provided at the top of the mounting bracket 200. The battery cell assembly further includes a BMS module 400, which is connected to the top of the support column 209. An annular insulating plate 210 surrounding the BMS module 400 is provided at the top of the mounting bracket 200. The BMS module 400 may include a mounting substrate and a battery management system provided on the mounting substrate. BMS is the English abbreviation of the battery management system. The BMS module 400 can improve the utilization rate of the battery, prevent the battery from overcharging and over-discharging, extend the service life of the battery, and monitor the state of the battery. The power line, balance wire harness, sampling wire harness, and communication wire harness of the battery pack can all be connected to the BMS module 400. In addition, by providing multiple support columns 209 on the mounting bracket 200, the BMS module 400 can be connected to the top of the support column 209 through fasteners or directly welded to the top of the support column 209. In this way, not only is the installation of the BMS module 400 relatively convenient, but also a gap can be formed between the BMS module 400 and the mounting bracket 200, thereby making the heat dissipation effect better. In addition, the mounting bracket 200 is provided with an annular insulating plate 210 surrounding the BMS module 400. The annular insulating plate 210 can be made of an electrically insulating material, which can reduce the risk of electric leakage and short circuit and has better safety performance.

[0054] The battery according to the second aspect embodiment of the present invention includes the battery cell assembly of the first aspect embodiment described above.

[0055] For example, the battery may further include a box body, and the battery cell assembly can be installed in the box body.

[0056] By adopting the battery cell assembly of the first aspect embodiment of the present invention, compared with the existing battery, in which the overall weight of the battery cell assembly is borne by the bottom end of the battery cell 300, in the battery cell assembly of the present invention, multiple battery cells 300 are carried on the housing 100 through the mounting bracket 200 at their top ends, and then carried on the box body of the battery through the housing 100. In this way, the bottom end of the battery cell 300 does not need to bear the overall weight of the battery cell assembly, thereby preventing the bottom end of the battery cell 300 from being subjected to excessive pressure and causing bending deformation or even fracture, so that the battery cell 300 has a longer service life.

[0057] It should be noted that since the battery can adopt all the technical solutions of the battery cell assembly of the first aspect embodiment described above, it has at least all the beneficial effects brought by the technical solutions of the first aspect embodiment. These additional beneficial effects will not be elaborated here.

[0058] It can be understood that the other components and operations of the battery according to the embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail here.

[0059] The electric two-wheeler according to the third aspect embodiment of the present utility model includes the battery of the second aspect embodiment described above.

[0060] For the electric two-wheeler according to the embodiment of the present utility model, by adopting the battery of the second aspect embodiment of the present utility model, compared with the existing battery where the overall weight of the cell assembly is borne by the bottom end of the cell 300, in the cell assembly of the present utility model, multiple cells 300 are carried on the housing 100 through the mounting frame 200 at their top ends, and then carried on the battery box through the housing 100. In this way, the bottom end of the cell 300 does not need to bear the overall weight of the cell assembly, thereby preventing the bottom end of the cell 300 from being bent or even broken due to excessive pressure, and thus making the service life of the cell 300 longer.

[0061] It should be noted that since the electric two-wheeler can adopt all the technical solutions of the cell assembly of the first aspect embodiment described above, it has at least all the beneficial effects brought by the technical solutions of the first aspect embodiment described above. These additional beneficial effects will not be elaborated here.

[0062] It can be understood that the other components and operations of the electric two-wheeler according to the embodiment of the present utility model are known to those of ordinary skill in the art, and will not be described in detail here.

[0063] The embodiments of the present utility model have been described in detail above with reference to the drawings, but the present utility model is not limited to the above embodiments. Various changes can be made without departing from the spirit of the present utility model within the knowledge scope of those of ordinary skill in the art.

Claims

1. A battery cell assembly, characterized in that: include: The housing is formed with a receiving cavity, and the top of the receiving cavity is open; A mounting frame connected to the top of the housing; A plurality of battery cells are accommodated side by side in the accommodation cavity, and the top ends of the battery cells are connected to the mounting frame so as to be supported on the shell through the mounting frame.

2. The battery cell assembly according to claim 1, characterized in that: The four corner positions of the top of the shell are respectively provided with fixing parts, and the four corner positions of the mounting frame are correspondingly provided with convex parts, and the convex parts are connected to the fixing parts through fasteners.

3. The battery cell assembly according to claim 2, characterized in that: The fixing portion includes two perpendicular fixing plates, wherein the end surface of one of the fixing plates is attached to the outer wall of the shell and connected to the shell via fasteners, and the end surface of the other fixing plate is attached to the bottom surface of the protrusion and connected to the protrusion via fasteners.

4. The battery cell assembly according to claim 2, characterized in that: A clamping slot is provided at the top end of the side wall of the shell, and a clamping structure is provided on the mounting frame, and the clamping structure and the clamping slot are clamped with each other.

5. The battery cell assembly according to claim 4, characterized in that: The card slots are provided with a plurality of slots, and the card connection structure comprises: A plurality of first clamping members, respectively disposed on both sides of the mounting frame along a first horizontal direction, the first clamping member being located between two adjacent protrusions, and the first clamping member being clamped in the clamping slot; A plurality of second clamping members, respectively disposed on both sides of the mounting frame along a second horizontal direction, the second clamping member being located between two adjacent protrusions, and the second clamping member being clamped in the clamping slot; The first horizontal direction is perpendicular to the second horizontal direction.

6. The battery cell assembly according to claim 5, characterized in that: The first clamping member includes a first connecting portion and a first buckle portion, the first connecting portion is located outside the housing, and the first buckle portion is connected to the first connecting portion and is clamped in the clamping slot; The second clamping member includes a second connecting portion and a second buckle portion, the second connecting portion is located at the inner side of the shell, and the second buckle portion is connected to the second connecting portion and is clamped in the clamping slot.

7. The battery cell assembly according to any one of claims 1 to 6, characterized in that: The mounting bracket abuts against the top surface of the side wall of the shell.

8. The battery cell assembly according to any one of claims 1 to 6, characterized in that: A plurality of support columns are provided at the top of the mounting frame, and the battery core assembly further comprises: The BMS module is connected to the top of the support column, and the top of the mounting frame is provided with an annular insulating plate surrounding the BMS module.

9. A battery, characterized in that: Comprising the battery core assembly as claimed in any one of claims 1 to 8.

10. An electric two-wheeled vehicle, characterized in that: Comprising the battery as claimed in claim 9.

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