Battery assembly and electric bicycle
By setting constraint and limiting components on the outer surface of the electric bicycle battery module, the problems of cumbersome and costly battery module fixing are solved, achieving the effects of lightweighting and preventing battery module bulging.
Patent Information
- Application Number
- CN202423030605.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2034-12-09
AI Technical Summary
The existing methods for fixing electric bicycle battery modules are cumbersome and costly, and their volume is prone to change during charge and discharge cycles, resulting in insufficient expansion restraint.
Constraints are used to surround the outer surface of the battery cell module, and limiting components are used to wrap the battery cell module and the constraints to avoid applying glue inside the shell. Lightweight and heat-resistant materials such as EPP and high-strength materials such as steel strips are used for fixation.
This reduces the weight of internal components and overall cost of the battery pack, while avoiding the bulging problem of the battery cell module during charge and discharge cycles.
Smart Images
Figure CN223757599U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] Embodiments of the present disclosure generally relate to the technical field of electric bicycles, and more particularly, to a battery assembly and an electric bicycle. BACKGROUND
[0002] In the field of electric bicycles, the conventional fixing of the battery module requires gluing inside the shell. Such gluing process is complicated and causes the weight of the internal components of the battery assembly to increase, and the cost is high. In addition, due to the insufficient expansion restraint force of the above fixing method, the volume of the conventional battery module is prone to change during the charging and discharging cycle. SUMMARY
[0003] The purpose of the present disclosure is to provide a battery assembly and an electric bicycle to at least partially solve the above problems.
[0004] In a first aspect of the present disclosure, a battery assembly is provided, comprising: a battery cylinder; a cover plate covering the battery cylinder to form a mounting chamber; a battery module arranged in the mounting chamber; and a restraint member arranged in the mounting chamber and having a closed structure, the restraint member being arranged on the outer surface of the battery module in the circumferential direction of the battery module.
[0005] According to embodiments of the present disclosure, the restraint member can pre-fix and constrain the battery module to exert sufficient expansion restraint force on the battery module, thereby avoiding the problem of easy bulging of the battery module during the charging and discharging cycle. In addition, since the gluing process inside the shell is avoided, the weight of the internal components of the battery assembly and the overall cost can be reduced.
[0006] In some embodiments, the battery module comprises a battery body and a pair of insulating supports, the pair of insulating supports being arranged around the battery body to wrap the battery body, and the restraint member being arranged on the outer surface of the pair of insulating supports in the circumferential direction of the battery module.
[0007] In some embodiments, the restraint member is arranged on the outer surface of the pair of insulating supports in one circle around the battery module.
[0008] In some embodiments, the battery assembly further comprises a pair of limiting members spaced apart from each other, each of the pair of limiting members wrapping a portion of the corresponding insulating support to limit the battery module.
[0009] In some embodiments, each of the pair of limiting members comprises a mounting groove and a limiting step arranged in the mounting groove, and a portion of each of the pair of insulating supports is arranged in the mounting groove and abuts against the limiting step.
[0010] In some embodiments, the insulating support includes a plurality of protrusions, the battery cell module further includes a circuit board disposed on an outer side of the battery cell body, the plurality of protrusions each penetrates through the circuit board, and the plurality of protrusions are located within the mounting groove and each spaced apart from the inner surface of the mounting groove.
[0011] In some embodiments, the constraint includes a pair of first portions spaced apart from each other and a pair of second portions, the pair of first portions each connected with the pair of second portions to constitute the enclosed structure.
[0012] In some embodiments, the pair of first portions each includes a main body portion and connecting portions located at both ends of the main body portion, the connecting portion of each of the pair of first portions extends toward the other first portion, one end of each of the pair of second portions is connected to an outer side of the corresponding connecting portion of one of the pair of first portions, and the other end of each of the pair of second portions is connected to an outer side of the corresponding connecting portion of the other of the pair of first portions.
[0013] In some embodiments, the pair of first portions are each welded to the pair of second portions to constitute the enclosed structure.
[0014] In a second aspect of the present disclosure, there is provided an electric bicycle, comprising any one of the battery assemblies according to the first aspect of the present disclosure.
[0015] It should be understood that the description in this section is not intended to define key or important features of embodiments of the present disclosure, nor is it used to limit the scope of the present disclosure. Other features of the present disclosure will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS
[0016] The above and other features, advantages, and aspects of embodiments of the present disclosure will become more apparent by describing in detail some embodiments thereof with reference to the attached drawings in which:
[0017] Figure 1 A structural schematic diagram of a battery assembly according to some embodiments of the present disclosure is shown;
[0018] Figure 2 An exploded view of a battery assembly is shown; Figure 1 An exploded view of a battery assembly is shown;
[0019] Figure 3 An exploded view of a battery assembly according to some embodiments of the present disclosure is shown;
[0020] Figure 4An exploded view of an electric cell module and a constraint according to some embodiments of the present disclosure is shown;
[0021] Figure 5 An exploded view of a constraint according to some embodiments of the present disclosure is shown;
[0022] Figure 6 A structural schematic view of an electric cell module, a constraint and a pair of limiters according to some embodiments of the present disclosure is shown;
[0023] Figure 7 A structural schematic view of a limiter according to some embodiments of the present disclosure is shown;
[0024] Figure 8 An enlarged schematic view of part A of the structure shown. Figure 6
[0025] BRIEF DESCRIPTION OF THE DRAWINGS
[0026] 100 is a battery assembly, 101 is a mounting chamber;
[0027] 1 is a battery cylinder, 11 is a base, 12 is a side plate;
[0028] 2 is a cover plate;
[0029] 3 is an electric cell module, 31 is an electric cell body, 32 is an insulating support, 321 is a protruding part, 33 is a circuit board;
[0030] 4 is a constraint, 41 is a first part, 411 is a main part, 412 is a connecting part, 42 is a second part;
[0031] 5 is a limiter, 51 is a mounting groove, 52 is a limiting step;
[0032] 6 is a first protection, 7 is a second protection. DETAILED DESCRIPTION
[0033] Preferred embodiments of the present disclosure will be described in more detail with reference to the drawings. Although preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure is more thoroughly and completely conveyed to those skilled in the art, and the scope of the present disclosure is fully conveyed to those skilled in the art.
[0034] The term "includes" and its variants are meant to cover non-exclusive inclusions, i.e., that the listed items are among a list of items but not exhaustive. The term "or" is meant to be inclusive, i.e., the term "or" means "and / or." The term "based on" means "based, at least in part, on." The terms "one example embodiment" and "an example embodiment" mean "at least one example embodiment." The term "another embodiment" means "at least one additional embodiment." The terms "a first," "a second," etc. do not mean "the" unless otherwise specifically stated.
[0035] Hereinafter, the principles of the present disclosure will be described with an electric bicycle as an example of an application environment of the battery assembly 100. However, it should be understood that such an application environment is only exemplary, and the battery assembly 100 according to embodiments of the present disclosure can also be applied to various vehicles.
[0036] Figure 1 A structural schematic diagram of the battery assembly 100 according to some embodiments of the present disclosure is shown. Figure 2 A structural schematic diagram of the battery assembly 100 according to some embodiments of the present disclosure is shown. Figure 1 An exploded view of the battery assembly 100 is shown. As shown in Figure 1 An exploded view of the battery assembly 100 is shown. As shown in Figure 2 As shown, the battery assembly 100 described herein generally includes a battery cylinder 1, a cover plate 2, a cell module 3, a constraint 4, a pair of limiters 5, a first protector 6, and a second protector 7 in structure.
[0037] Referring to Figure 1 As shown, the battery assembly 100 described herein generally includes a battery cylinder 1, a cover plate 2, a cell module 3, a constraint 4, a pair of limiters 5, a first protector 6, and a second protector 7 in structure. Figure 2 The cover plate 2 covers the battery cylinder 1 to constitute a mounting chamber 101, and the cell module 3, the constraint 4, the pair of limiters 5, the first protector 6, and the second protector 7 are all arranged in the mounting chamber 101. The battery cylinder 1 can include a base 11 and a pair of side plates 12. One end of each side plate 12 of the pair of side plates 12 can be connected with the base 11, and the other end of each side plate 12 of the pair of side plates 12 can be connected with the cover plate 2 to constitute the mounting chamber 101. The cover plate 2 can be pressed on the first protector 6, and the first protector 6 can be pressed on one end of the pair of limiters 5. The pair of limiters 5 wrap the whole of the cell module 3 and the constraint 4 to limit the whole of the cell module 3 and the constraint 4. The base 11 can support the second protector 7, and the second protector 7 can support the other end of the pair of limiters 5. In addition, the outer surface of the pair of limiters 5 can be in contact with the inner surface of the corresponding side plate 12, so that the pair of limiters 5 cooperates with the battery cylinder 1.
[0038] According to embodiments of the present disclosure, the pair of limit members 5 wrap and limit the whole of the battery cell module 3 and the restraint member 4, which is advantageous for weight reduction design and cost reduction design compared to the way of gluing in the shell to fix the battery cell module 3, and solves the problems of weight increase of internal parts of the battery assembly 100 and high overall cost. The principle of the pair of limit members 5 limiting the whole of the battery cell module 3 and the restraint member 4 will be described below in combination with Figure 3 , Figure 6 and Figure 7 .
[0039] The limit member 5 according to embodiments of the present disclosure can be made of various types of materials currently known or available in the future, as long as it has the characteristics of light weight, heat resistance, and small deformation under stress, and embodiments of the present disclosure do not limit the material. For example, in some embodiments, the limit member 5 can be made of expanded polypropylene (EPP) material. The specific gravity of the limit member 5 made of EPP material is light, which makes it have a significant advantage in reducing the weight of the product. In addition, the EPP material has strong heat resistance. In addition, the EPP material has high hardness and small deformation under stress.
[0040] Figure 3 An exploded view of the battery cell module 3, the restraint member 4, and the pair of limit members 5 according to some embodiments of the present disclosure is shown. Figure 4 An exploded view of the battery cell module 3 and the restraint member 4 according to some embodiments of the present disclosure is shown. As shown in Figure 3 and Figure 4 , in some embodiments, the restraint member 4 has a closed structure. The restraint member 4 is arranged on the outer surface of the battery cell module 3 in the circumferential direction of the battery cell module 3. In this way, the restraint member 4 can pre-fix the battery cell module 3 and constrain the battery cell module 3 to exert sufficient expansion restraint force on the battery cell module 3 to avoid the problem of easy bulging of the battery cell module during the charging and discharging cycle.
[0041] The restraint member 4 according to embodiments of the present disclosure can be made of various types of materials currently known or available in the future, as long as it has the characteristic of high strength, and embodiments of the present disclosure do not limit this. For example, in some embodiments, the restraint member 4 can be a steel belt. The restraint member 4 made of steel has high strength and small deformation under heat.
[0042] Referring to Figure 3 and Figure 4In some embodiments, if the constraint 4 is conductive, in order to avoid the constraint 4 short-circuiting the battery cell module 3, the battery cell module 3 can include the battery cell body 31 and a pair of insulating supports 32. The pair of insulating supports 32 can be detachably disposed around the battery cell body 31 to wrap the battery cell body 31, and it can be understood that the detachable design facilitates the assembly of the battery cell body 31 in the pair of insulating supports 32. The constraint 4 can be disposed around the pair of insulating supports 32 on the outer surface of the pair of insulating supports 32, and thus the pair of insulating supports 32 can avoid the constraint 4 short-circuiting the battery cell module 3. It should be understood that in other embodiments, the battery cell module 3 can adopt any other appropriate structure to cooperate with the constraint 4 to avoid the constraint 4 short-circuiting the battery cell module 3.
[0043] Reference Figure 3 and Figure 4 In some embodiments, the constraint 4 can be disposed around the battery cell module 3 one turn on the outer surface of the pair of insulating supports 32. Thus, the constraint 4 can not only constrain the battery cell module 3, but also reduce the weight design. It should be understood that in other embodiments, the constraint 4 can also be disposed around the battery cell module 3 multiple turns on the outer surface of the pair of insulating supports 32.
[0044] Figure 5 An exploded view of the constraint 4 according to some embodiments of the present disclosure is shown. As Figure 3 to Figure 5 shown, in some embodiments, in order for the constraint 4 to constrain the battery cell module 3, the constraint 4 can include a pair of first portions 41 and a pair of second portions 42, wherein the pair of first portions 41 are spaced apart from each other and the pair of second portions 42 are spaced apart from each other. The pair of first portions 41 are each connected with the pair of second portions 42 to form a closed structure; thus, in the case that the pair of first portions 41 and the pair of second portions 42 are each in contact with the outer surface of the corresponding insulating support 32, the constraint 4 can constrain the battery cell module 3. It should be understood that in other embodiments, the constraint 4 can adopt any other appropriate structure to constrain the battery cell module 3.
[0045] Continuing to refer to Figure 4 and Figure 5 Further, each of the pair of first portions 41 can include a main body portion 411 and a connecting portion 412 located at both ends of the main body portion 411. The connecting portion 412 of each of the pair of first portions 41 can extend towards the other first portion 41. One end of each of the pair of second portions 42 is connected to the outer side surface of the corresponding connecting portion 412 of one of the pair of first portions 41, and the other end of each of the pair of second portions 42 is connected to the outer side surface of the corresponding connecting portion 412 of the other of the pair of first portions 41; thus, the constraint 4 can form a closed structure and constrain the battery cell module 3.
[0046] With reference back to Figure 4 and Figure 5 , in some embodiments, to make the connection between the pair of first portions 41 and the pair of second portions 42 not occupy a large amount of space inside, the pair of first portions 41 can each be welded to the pair of second portions 42 to form a closed structure; in addition, the welding cost is low, which is conducive to cost reduction design. It should be understood that in other embodiments, the pair of first portions 41 and the pair of second portions 42 can be assembled in any other appropriate connection manner to avoid occupying a large amount of space inside.
[0047] With reference back to Figure 5 , further, the pair of first portions 41 and / or the pair of second portions 42 can each be designed with a hole to reduce weight and cost.
[0048] Specifically, after the constraint 4 is assembled with the battery cell module 3, the pair of limiting members 5 can wrap and limit the whole of the battery cell module 3 and the constraint 4. Figure 6 A structural schematic diagram of the battery cell module 3, the constraint 4, and the pair of limiting members 5 according to some embodiments of the present disclosure is shown. As Figure 3 and Figure 6 shown, in some embodiments, the pair of limiting members 5 can be spaced apart from each other, and each of the pair of limiting members 5 can wrap a part of the corresponding insulating support 32 to limit the whole of the battery cell module 3 and the constraint 4. It can be understood that the pair of limiting members 5 being spaced apart from each other is conducive to heat dissipation design, and in addition, it is also convenient to assemble the whole of the battery cell module 3 and the constraint 4 in the pair of limiting members 5.
[0049] Figure 7 A structural schematic diagram of the limiting member 5 according to some embodiments of the present disclosure is shown. As Figure 3 , Figure 6 and Figure 7 shown, in some embodiments, to make the pair of limiting members 5 limit the battery cell module 3, each of the pair of limiting members 5 can include a mounting groove 51 and a limiting step 52 disposed in the mounting groove 51. A part of each of the pair of insulating supports 32 can be disposed in the mounting groove 51 and can abut against the limiting step 52. It should be understood that in other embodiments, the pair of limiting members 5 can adopt any other appropriate structure to limit the battery cell module 3.
[0050] Figure 8 An enlarged schematic diagram of part A of the structure shown in Figure 6 is shown. In some embodiments, referring to Figure 3 , the battery cell body 31 includes a plurality of battery cell monomers. The circuit board 33 is disposed on the outer side of the battery cell body 31, and the circuit board 33 can be electrically connected with the battery cell body 31. Correspondingly, referring toFigure 6 and Figure 8 The insulating support 32 can include a plurality of protrusions 321 which can limit the circuit board 33.
[0051] With reference to Figure 6 to Figure 8 In some embodiments, the plurality of protrusions 321 can be located within the mounting groove 51 and disposed adjacent to the limiting step 52. Since the pair of limiters 5 can be deformed by being impacted, in order to avoid the pair of limiters 5 being impacted on the components on the circuit board 33 after being impacted by the impact force F as shown in Figure 8 In order to avoid the pair of limiters 5 being impacted on the components on the circuit board 33 after being impacted by the impact force F as shown in
[0052] Embodiments of the present disclosure also provide an electric bicycle comprising any one of the battery assemblies 100 as described above.
[0053] Embodiments of the present disclosure have been described above with the understanding that the above description is exemplary only and is not exhaustive and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The choice of words in this document is intended to best explain the principles of the embodiments, practical application, or improvement to the art in the market, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein.
Claims
1. A battery assembly (100) characterized by, The battery assembly (100) comprises: a battery cylinder (1); a cover plate (2) covering the battery cylinder (1) to form a mounting cavity (101); a battery cell module (3) arranged in the mounting cavity (101); and a restraint member (4) arranged in the mounting cavity (101) and having a closed structure, the restraint member (4) being arranged on an outer surface of the battery cell module (3) in a circumferential direction of the battery cell module (3).
2. The battery assembly (100) according to claim 1, characterized in that The battery cell module (3) comprises a battery cell body (31) and a pair of insulation supports (32) which are detachably arranged around the battery cell body (31) to wrap the battery cell body (31), and the restraint member (4) is arranged on an outer surface of the pair of insulation supports (32) in a circumferential direction of the pair of insulation supports (32).
3. The battery assembly (100) of claim 2, characterized in that, The restraint member (4) is arranged on the outer surface of the pair of insulation supports (32) in a circumferential direction of the battery cell module (3).
4. The battery assembly (100) of claim 2, wherein, The battery assembly (100) further comprises a pair of limiting members (5) which are spaced apart from each other, and each of the pair of limiting members (5) wraps a part of a corresponding insulation support (32) to limit the battery cell module (3).
5. The battery assembly (100) of claim 4, characterized in that Each of the pair of limiting members (5) comprises a mounting groove (51) and a limiting step (52) arranged in the mounting groove (51), and a part of each of the pair of insulation supports (32) is arranged in the mounting groove (51) and abuts against the limiting step (52).
6. The battery assembly (100) of claim 5, characterized in that The insulation support (32) comprises a plurality of protrusions (321), the battery cell module (3) further comprises a circuit board (33) arranged on an outer side of the battery cell body (31), each of the plurality of protrusions (321) penetrates through the circuit board (33), and each of the plurality of protrusions (321) is located in the mounting groove (51) and spaced apart from an inner surface of the mounting groove (51).
7. The battery assembly (100) of claim 1, wherein, The restraint member (4) comprises a pair of first portions (41) and a pair of second portions (42) which are spaced apart from each other, each of the pair of first portions (41) is connected to the pair of second portions (42) to form the closed structure.
8. The battery assembly (100) of claim 7, characterized in that Each of the pair of first portions (41) comprises a main portion (411) and a connecting portion (412) located at two ends of the main portion (411), the connecting portion (412) of each of the pair of first portions (41) extends towards the other first portion (41), one end of each of the pair of second portions (42) is connected to an outer side of a corresponding connecting portion (412) of one of the pair of first portions (41), and the other end of each of the pair of second portions (42) is connected to an outer side of a corresponding connecting portion (412) of the other of the pair of first portions (41).
9. The battery assembly (100) of claim 7, wherein, Each of the pair of first portions (41) is welded to the pair of second portions (42) to form the closed structure.
10. An electric bicycle, characterized by The electric bicycle comprises: The battery assembly (100) according to any one of claims 1 to 9.