Lithium battery assembly for electric tricycle

Abstract

The utility model discloses a lithium battery assembly for an electro-tricycle, which comprises a box body and a locking mechanism, a plurality of battery packs distributed in a whole row are carried in an inner cavity where the box body is located, electrodes of two adjacent battery packs are connected with each other through a flexible wire harness, and positive and negative electrode output interfaces communicated with the battery packs are arranged on the outer side of the box body; first locking rods of the locking mechanism are fixed in the transverse direction, second locking rods of the locking mechanism are fixed in the longitudinal direction, and a plurality of groups of first locking rods and second locking rods are distributed in a crossed manner, so that a front end cover of a plurality of battery packs is integrally formed; and a cover plate covers the open surface of the upper part of the box body to form a sealing cover for the inner cavity of the box body. According to the whole device, the battery packs borne in the inner cavity of the box body are completely wrapped through the positioning plates, mutual shaking between the adjacent battery packs can be reduced or reduced, normal power supply between the battery packs is guaranteed, and then the upper surfaces of the battery packs are fixed through the locking mechanisms.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium battery packs, and in particular relates to a lithium battery assembly for an electric tricycle. Background Art

[0002] Lithium batteries are increasingly used in electric tricycles due to their high energy density, long lifespan, and low maintenance requirements. Compared to traditional lead-acid batteries, lithium batteries are lighter and more environmentally friendly, contributing to improved performance and market competitiveness of electric tricycles. With the continuous advancement of lithium battery technology and its decreasing cost, lithium batteries are becoming more widely used in electric tricycles. Furthermore, the development of lithium battery management systems has also improved the safety and reliability of lithium batteries. The application prospects of lithium battery components in electric tricycles are promising, and with technological advancements and growing market demand, their widespread adoption is expected to occur in the coming years.

[0003] In Chinese patent application publication number CN213878293U, a lithium battery for electric tricycles that is easy to disassemble is disclosed, including a housing, a lithium battery, and a desiccant box. The right end of the housing is hingedly connected to a box cover, which is slidably connected to a fixed block located at the right end. The inner side of the housing is slidably connected to a fixed block, which is slidably connected to the lithium battery. The outer side of the fixed block is fixedly connected to positioning blocks at the front and rear ends. This structure can be used in the field of electric tricycles. However, since the battery fixing component is only connected by the fixed block, and the gaps between adjacent battery packs are large, they are prone to shaking, which is particularly prone to failure of the connecting lines (or solder joints) between adjacent battery packs. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a lithium battery assembly for an electric tricycle, which solves the above-mentioned technical problems in the prior art.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A lithium battery assembly for an electric tricycle, comprising a box body, a locking mechanism,

[0007] The box body presents a box-like structure with an open top, and carries multiple battery packs distributed in an array in the inner cavity of the box structure, with the contact electrodes of the multiple battery packs all facing outward, and the electrodes of two adjacent battery packs are interconnected by a flexible wiring harness. Positive and negative output interfaces connected to the battery packs are provided on the outside of the box body, and power is supplied to the electric tricycle through the positive and negative output interfaces;

[0008] The locking mechanism includes a first locking rod and a second locking rod, wherein the first locking rod forms a transverse fixation, and the second locking rod forms a longitudinal fixation, and the first locking rod and the second locking rod are arranged in a cross-distributed manner in a plurality of groups, so that the whole forms a front end cover for multiple battery packs;

[0009] The upper open surface of the box body is covered with a cover plate to form a cover for the inner cavity of the box body.

[0010] Furthermore, the battery pack carried in the box body is fixed on all sides by positioning plates, and the cross-section of the positioning plates is a U-shaped structure, and the area surrounded by the positioning plates on all sides forms a wrapping for the entire periphery of the battery pack.

[0011] Furthermore, several groups of deduplication holes are provided on the first locking rod and the second locking rod, and connection holes are provided at both ends of the first locking rod and the second locking rod respectively, and the connection holes are used to form a locking fixation with the upper part of the positioning plate, thereby wrapping the area where the battery pack is located.

[0012] Furthermore, the sides of the two adjacent groups of positioning plates are locked together through positioning holes, and the area formed by the positioning plates on one side and the inner cavity of the box body is used to carry electronic components.

[0013] Furthermore, the cover plate is fixed to the opening edge of the box body by means of bolt connection.

[0014] Furthermore, a base member is provided at the bottom of the box body and is symmetrically arranged. One side of the base member supports the bottom of the box body as a whole, and the other side extends outward and is provided with multiple reinforcing ribs, and the bolt holes opened on the other side fix the base member as a whole.

[0015] Furthermore, the bottom of the box body and the position between the two groups of base members are filled with shock-absorbing foam, so that the shock-absorbing foam forms support for the bottom of the box body.

[0016] Furthermore, hooks are symmetrically arranged on both sides of the upper edge of the box body.

[0017] Furthermore, a secondary output interface is provided on the outside of the box body, and power is supplied to an external power supply through the secondary output interface.

[0018] Beneficial effects of the utility model:

[0019] 1. This device uses a positioning plate to completely wrap the battery pack carried in the inner cavity of the box body, which can reduce or minimize the mutual shaking between adjacent battery packs. The two adjacent battery packs are electrically connected by a soft connection to ensure normal power supply between the battery packs. The upper surface of the battery pack is then fixed by a locking mechanism.

[0020] 2. The positioning plate used in this device completely wraps the battery pack, and the cross-section of the positioning plate presents a U-shaped structure, so it can effectively absorb energy and provide protection when impacted.

[0021] 3. The first locking rod and the second locking rod used in this device are provided with deweighting holes, which can reduce the overall counterweight without affecting the structural strength, thereby improving the convenience of carrying the entire equipment.

[0022] 4. The device is provided with a base at the bottom of the box body for support, and the area between the bases is filled with shock-absorbing foam, which can reduce the amplitude of bumps that occur for a long time during riding. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for describing the embodiments or the prior art.

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0025] Figure 2 It is a schematic diagram of the internal structure of an embodiment of the utility model;

[0026] Figure 3 This is an embodiment of the utility model Figure 2 Schematic diagram of the partial structure at A in the middle;

[0027] Figure 4 This is a schematic diagram of the top view of the structure of an embodiment of the utility model;

[0028] Figure 5 It is a schematic diagram of the cross-sectional structure of an embodiment of the present utility model;

[0029] Figure 6 It is a schematic structural diagram of a positioning plate according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0030] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] like Figure 1 、 Figure 2 As shown, the embodiment of the present invention provides a lithium battery assembly for an electric tricycle, including a box body 1 and a locking mechanism 2. The box body 1 presents a box-like structure with an open top. This structure has high strength and can effectively resist external impacts. At the same time, positioning plates 13 are respectively provided around the box body 1 (see Figure 6 As shown in the figure, the area enclosed by the positioning plates 13 on all sides is used to wrap the entire battery pack 3. The cross-section of the positioning plates 13 is a U-shaped structure (i.e., the two sides extend outward and the middle is a panel-like structure). This means that the battery pack 3 is not in direct contact with the four walls of the inner cavity where the box body 1 is located (so that the gap area between the inner wall of the box body 1 and the positioning plates 13 forms an energy-absorbing part). Even when the box body 1 is subjected to a large impact, it can still play a good buffering role. The sides of the two adjacent groups of positioning plates 13 are locked and connected to each other through positioning holes, which is very firm. Of course, for other electronic components that need to be assembled, in this application, they can be placed in a reserved space between the positioning plates 13 and the inner cavity where the box body 1 is located to ensure the integrity of the overall appearance.

[0032] The box-like structure houses multiple battery packs 3 arranged in rows within its inner cavity, with the contact electrodes facing outward. Adjacent battery packs 3 are connected by flexible wiring harnesses. This design differs from conventional welding methods for battery packs 3. Even if the battery packs 3 are impacted, the flexible wiring harnesses connecting the electrodes of adjacent battery packs 3 prevent them from becoming detached. Positive and negative output interfaces 101, connected to the battery packs 3, are located on the outside of the box body 1. These interfaces provide power to the electric tricycle's motor.

[0033] And as needed, an auxiliary output interface 102 is provided on the outside of the box body 1, and power is supplied to the external power supply through the auxiliary output interface 102. This auxiliary output interface 102 can be set in multiple models to adapt to different external electrical appliances, and can also be controlled by a button switch, a self-locking switch, or a socket switch.

[0034] The upper open surface of the box body 1 is covered with a cover plate 4 to form a cover for the inner cavity of the box body 1. In order to facilitate installation, the cover plate 4 is fixed to the opening edge of the box body 1 by bolt connection, which ensures its overall structural strength while also achieving overall aesthetics.

[0035] like Figure 3As shown, the locking mechanism 2 includes a first locking rod 21 and a second locking rod 22. The first locking rod 21 forms a horizontal fixation, while the second locking rod 22 forms a longitudinal fixation. The first locking rod 21 and the second locking rod 22 are arranged in a cross-distributed manner in several groups, so that the whole body forms a cover for the upper end surface of multiple battery packs 3. That is, when the first locking rod 21 and the second locking rod 22 are fixed to the positioning plates 13 on all sides, they are not only fixed from all directions, but also located on the upper surface of the battery pack 3. The cross-distribution of the first locking rod 21 and the second locking rod 22 also forms a fixation to the upper surface, ensuring that the battery pack 3 can form a complete whole and reduce the shaking between adjacent battery packs 3. Of course, when the first locking rod 21 and the second locking rod 22 cover and fix the upper surface of the battery pack 3, they will avoid the pressure relief valve provided by the battery pack 3, ensuring the safety of normal pressure relief of the batteries.

[0036] like Figure 4 、 Figure 5 As shown, several groups of weight removal holes 201 are provided on the first locking rod 21 and the second locking rod 22 (which can reduce the overall counterweight weight without affecting the structural strength), and connecting holes 202 are provided at both ends of the first locking rod 21 and the second locking rod 22, respectively, to form a locking fixation with the upper part of the positioning plate 13 through the connecting holes 202 (at this time, corresponding holes are also provided on the upper part of the positioning plate 13 to adapt to each other), and according to needs, the connecting holes 202 are distributed in multiple groups, which can adapt to the usage status of different sizes surrounded by the positioning plate 13.

[0037] A base member 11 is provided at the bottom of the box body 1 and is symmetrically arranged. One side of the base member 11 supports the bottom of the box body 1 as a whole, and the other side extends outward and is provided with multiple reinforcing ribs 111 (the structural arrangement of the reinforcing ribs 111 can improve its overall structural strength), and the bolt holes opened on the other side are used to fix the base member 11 as a whole, that is, after being connected to the vehicle body through the bolt holes, the box body 1 as a whole is placed in the middle position of the two groups of base members 11, and the position at the bottom of the box body 1 and between the two groups of base members 11 is filled with shock-absorbing foam 112, so that the shock-absorbing foam 112 forms a support for the bottom of the box body 1. At this time, the shock-absorbing foam 112 is about 2 mm higher than the bottom height of the box body 1 supported by the inner side of the base member 11, so it can play an effective shock-absorbing role, that is, the smaller bumps during riding of the electric tricycle will not affect the amplitude of the battery pack 3 in the box body 1.

[0038] Hooks 12 are symmetrically provided on both sides of the upper edge of the box body 1 , and the entire box can be carried by the hooks 12 , making it easy to disassemble and assemble.

[0039] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A lithium battery assembly for an electric tricycle, comprising a box body (1) and a locking mechanism (2), characterized in that: The box body (1) presents a box-like structure with an open top, and carries a plurality of battery packs (3) distributed in a row in the inner cavity of the box structure, and the contact electrodes of the plurality of battery packs (3) are all facing outwards, and the electrodes of two adjacent battery packs (3) are connected to each other by a soft wire harness, and a positive and negative output interface (101) in communication with the battery pack (3) is provided on the outside of the box body (1), and power is supplied to the electric tricycle via the positive and negative output interface (101); The locking mechanism (2) includes a first locking rod (21) and a second locking rod (22), wherein the first locking rod (21) forms a transverse fixation, and the second locking rod (22) forms a longitudinal fixation, and the first locking rod (21) and the second locking rod (22) are arranged in a cross-distributed manner in a plurality of groups, so that the whole forms a front end cover for a plurality of battery packs (3); The upper open surface of the box body (1) is covered with a cover plate (4) to form a cover for the inner cavity of the box body (1).

2. The lithium battery assembly for an electric tricycle according to claim 1, characterized in that: The battery pack (3) carried in the box body (1) is fixed on all four sides by positioning plates (13), and the cross section of the positioning plates (13) is a U-shaped structure, and the area surrounded by the positioning plates (13) on all four sides forms a wrapping around the entire periphery of the battery pack (3).

3. The lithium battery assembly for an electric tricycle according to claim 2, characterized in that: The first locking rod (21) and the second locking rod (22) are provided with a plurality of groups of deduplication holes (201), and connecting holes (202) are provided at both ends of the first locking rod (21) and the second locking rod (22). The connecting holes (202) are used to form a locking fixation with the upper part of the positioning plate (13), thereby wrapping the area where the battery pack (3) is located.

4. The lithium battery assembly for an electric tricycle according to claim 2, characterized in that: The sides of the two adjacent groups of positioning plates (13) are locked together through positioning holes, and the area formed by the positioning plates (13) on one side and the inner cavity of the box body (1) is used to carry electronic components.

5. The lithium battery assembly for an electric tricycle according to claim 1, characterized in that: The cover plate (4) is fixed to the opening edge of the box body (1) by means of bolt connection.

6. The lithium battery assembly for an electric tricycle according to claim 1, characterized in that: A base member (11) is provided at the bottom of the box body (1) and is symmetrically arranged. One side of the base member (11) is used to support the bottom of the box body (1) as a whole, and the other side extends outward and is provided with a plurality of reinforcing ribs (111). Bolt holes are provided on the other side to fix the base member (11) as a whole.

7. The lithium battery assembly for an electric tricycle according to claim 6, characterized in that: The position located at the bottom of the box body (1) and between the two groups of base members (11) is filled with shock-absorbing foam (112), so that the shock-absorbing foam (112) forms support for the bottom of the box body (1).

8. The lithium battery assembly for an electric tricycle according to claim 1, characterized in that: Hooking parts (12) are symmetrically arranged on both sides of the upper edge of the box body (1).

9. The lithium battery assembly for an electric tricycle according to claim 1, characterized in that: An auxiliary output interface (102) is provided on the outside of the box body (1), and power is supplied to an external power supply via the auxiliary output interface (102).

Images