Storage battery system of two-wheeled electric vehicle

Abstract

The utility model provides a two-wheeled electric vehicle storage battery system which comprises a protection box upper shell, a protection box lower shell, a protection device assembly and a storage battery pack, the protection box upper shell is fixedly connected with the upper portion of the protection box lower shell through self-tapping screws, and the protection device assembly comprises a storage battery system protection device. A sunken groove is formed in the bottom of the inner side of the protection box lower shell, the storage battery system protection device is arranged in the sunken groove, a circle of supporting steps are arranged on the periphery of the middle of the inner side of the protection box lower shell, and the storage battery pack is arranged on the upper middle portion of the inner side of the protection box lower shell. A first heat dissipation gap is formed between the upper portion of the storage battery system protection device and the bottom of the storage battery pack, and a heat dissipation supporting assembly for isolating the bottom of the storage battery system protection device from the bottom of the sinking groove is arranged at the bottom of the sinking groove. The storage battery system is reasonable in wiring harness arrangement and has dustproof and waterproof functions, and the storage battery protection device has a heat dissipation space, so that stable operation of the storage battery system is effectively realized.

Description

Technical Field

[0001] The utility model relates to the technical field of production and manufacturing of two-wheeled electric vehicles, in particular to a battery system for a two-wheeled electric vehicle. Background Art

[0002] According to the document "Electrical Safety Requirements for Electric Bicycles" released on December 29, 2022, electric bicycle battery systems need to add a new protection device module to ensure that the voltage, current and temperature of the battery system are within the allowable range in real time.

[0003] The installation space and direction of the protection device are not only controlled by the structure of the battery pack, but also by the connection of the external line. If the protection device does not have enough heat dissipation space, there will be safety hazards; if the connection wires of the protection device are not planned and constrained, resulting in multiple wiring harnesses being entangled together, it will be inconvenient for the protection device to accurately diagnose the battery pack, and it will make the subsequent assembly of components difficult, time-consuming and labor-intensive; and considering that when the two-wheeled electric vehicle is riding on rainy days, rainwater may also penetrate into the protection box, which is not conducive to the safe operation of the battery system. How to solve the heat dissipation, waterproof and dustproof of the battery system protection device in the battery box and the reasonable layout of the wiring harness is an urgent problem to be solved. Utility Model Content

[0004] The utility model aims to provide a two-wheeled electric vehicle battery system, the battery system wiring harness is reasonably arranged, has dust and water proof functions, and the battery protection device has heat dissipation space, thereby effectively realizing the stable operation of the battery system.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a two-wheeled electric vehicle battery system, including a protective box upper shell, a protective box lower shell, a protective device assembly, and a battery pack, the protective box upper shell adopts self-tapping screws to achieve fixed connection with the upper part of the protective box lower shell, the protective device assembly includes a battery system protection device, a sinking groove is arranged at the bottom of the inner side of the protective box lower shell, the battery system protection device is arranged in the sinking groove, a circle of supporting steps is arranged around the middle part of the inner side of the protective box lower shell, the battery pack is arranged in the middle and upper part of the inner side of the protective box lower shell, and the supporting steps are used to support the bottom periphery of the battery pack, a first heat dissipation gap is arranged between the upper part of the battery system protection device and the bottom of the battery pack, and a heat dissipation support assembly is arranged at the bottom of the sinking groove to isolate the bottom of the battery system protection device from the bottom of the sinking groove.

[0006] Preferably, the bottom of the upper shell of the protective box is concave, and reinforcing ribs and positioning columns are provided at the bottom of the upper shell of the protective box. Several of the positioning columns are used to press on the upper part of the battery pack, and an upper shell wiring groove is provided on the left and right sides of the upper shell of the protective box.

[0007] Furthermore, a plurality of grooves are arranged on the bottom edge of the upper shell of the protection box, and convex edges corresponding to the grooves are arranged on the upper edge of the lower shell of the protection box.

[0008] Furthermore, a lower shell wiring groove corresponding to the upper shell wiring groove is respectively arranged on the left and right sides of the lower shell of the protection box.

[0009] Furthermore, a first wire card and a wiring hole are provided at the lower inner part of the wiring groove of the lower shell, and the wiring hole is located diagonally above the first wire card. Two second wire cards distributed up and down are provided in the wiring groove of the lower shell located on the left side of the lower shell of the protective box, and the second wire cards are located above the corresponding wiring holes.

[0010] Furthermore, the protection device assembly also includes a DC wiring harness, a battery positive wiring harness, a battery negative wiring harness, and a charging wiring harness; the DC wiring harness, the battery positive wiring harness, the battery negative wiring harness, and the charging wiring harness are all electrically connected to the battery system protection device.

[0011] Preferably, the heat dissipation support assembly includes a hollow support member, the hollow support member is in a field shape, and the hollow support member is fixedly arranged at the middle position of the bottom of the sinking groove.

[0012] A supporting plate is provided at each of the four top corners of the hollow supporting member, and the upper plane of the supporting plate is flush with the upper plane of the supporting step, and the vertical gap between the upper plane of the supporting plate and the battery system protection device constitutes the first heat dissipation gap.

[0013] The beneficial effects of the utility model are as follows: the utility model has a simple structure and is easy to manufacture; wire grooves are arranged in both the upper shell and the lower shell of the protection box, and at the same time, a number of wire clips are arranged in the wire grooves in the lower shell of the protection box, so as to facilitate the reasonable layout of the wiring harness of the battery system; the support vertical plate can be used to isolate the upper part of the battery protection device from the bottom of the battery pack, thereby forming a certain upper heat dissipation space, and further, the bottom of the battery system protection device is isolated from the bottom of the sunken groove by a hollow support member, and the hollow support member is hollow, which also facilitates the heat dissipation of the bottom of the battery system protection device; the convex edge is inserted into the groove to realize the waterproof and dustproof function of the closed space composed of the upper shell of the protection box and the lower shell of the protection box. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some preferred embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is the overall structural front view of the utility model;

[0017] Figure 3 for Figure 2 Longitudinal section view along AA axis;

[0018] Figure 4 It is a side view of the lower shell of the protective box;

[0019] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0020] Figure 6 for Figure 4 Enlarged view of point B in the middle;

[0021] Figure 7 It is a top view of the lower shell of the protective box;

[0022] Figure 8 for Figure 7 Longitudinal section view along the BB axis;

[0023] Fig. 9 for Figure 8 Enlarged view of point C in the middle;

[0024] Fig.10 It is a schematic diagram of the structure of the battery system protection device components;

[0025] Fig.11 A top view of the distribution of battery system protection device components in the lower shell of the protection box;

[0026] Fig.12 A side view showing the distribution of the battery system protection device components in the lower shell of the protection box;

[0027] Fig.13 This is a schematic diagram of the upper shell of the protective box;

[0028] Fig.14 for Fig.13 Enlarged view of point D in the middle;

[0029] Fig.15 It is a schematic diagram of the battery pack structure;

[0030] Fig.16 This is a schematic diagram of installing the battery pack in the lower shell of the protective box;

[0031] In the figure: 1 protective box upper shell, 11 positioning column, 12 upper shell through hole, 13 upper shell wiring groove, 14 reinforcing rib, 15 groove, 2 protective box lower shell, 20 convex edge, 21 lower shell mounting hole, 22 hollow support, 23 support vertical plate, 24 first wire clamp, 241 wire clamp plate, 242 inclined sliding surface, 25 wiring hole, 26 second wire clamp, 27 lower shell through hole, 28 lower shell wiring groove, 3 battery system protection device assembly, 31 battery positive electrode wiring harness, 32 charging wiring harness, 33 battery negative electrode wiring harness, 34 DC wiring harness, 35 battery system protection device, 351 screw mounting hole, 4 battery pack, 41 battery, 5 self-tapping screws, 6 pan head screws, 101 first heat dissipation gap, 102 support step. DETAILED DESCRIPTION

[0032] The following will be combined with specific embodiments and attached Figure 1-16 , the technical solutions in the embodiments of the utility model are clearly and completely described. Obviously, the described embodiments are only part of the preferred embodiments of the utility model, not all of the embodiments. Those skilled in the art can make similar modifications without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0033] The utility model provides a two-wheeled electric vehicle battery system (such as Figure 1As shown), it includes a protective box upper shell 1, a protective box lower shell 2, a protective device assembly 3, and a battery pack 4. The protective box upper shell 1 and the protective box lower shell 2 can be made of plastic material through an injection molding process, which is conducive to achieving structural standardization while improving production and processing efficiency. The protective box upper shell 1 adopts self-tapping screws 5 to achieve a fixed connection with the upper part of the protective box lower shell 2. Specifically, four upper shell through holes 12 are provided around the protective box upper shell 1, and lower shell through holes 27 corresponding to the upper shell through holes 12 are provided around the protective box lower shell 2. Automatic screws The screw passes through the upper shell through hole 12 and is tightened in the lower shell through hole 27 to realize the fixed connection between the upper shell 1 of the protection box and the lower shell 2 of the protection box. In order to facilitate the fixation of the lower shell 2 of the protection box on the electric vehicle frame, four lower shell mounting holes 21 are provided at the bottom of the lower shell 2 of the protection box. A pan head screw 6 is provided in each lower shell mounting hole 21, and the pan head screw 6 is used to realize the fixed connection with the electric vehicle frame; the protection device assembly 3 includes a battery system protection device 35, and the battery system protection device 35 is a known technical product in the art. Here, the structure of the battery system protection device 35 is no longer described in detail. A sinking groove is provided at the bottom inner side of the protection box lower shell 2, and the battery system protection device 35 is provided in the sinking groove. A circle of supporting steps 102 is provided around the middle inner side of the protection box lower shell 2. The battery pack 4 is provided in the middle and upper inner side of the protection box lower shell 2, and the supporting steps are used to support the bottom periphery of the battery pack 4. A first heat dissipation gap 101 is provided between the upper part of the battery system protection device 35 and the bottom of the battery pack 4. In actual applications, the first heat dissipation gap 101 is utilized to effectively isolate the battery pack 4 from the battery system protection device 35, thereby facilitating effective heat dissipation of the upper part of the battery system protection device 35. A heat dissipation support component is provided at the bottom of the sinking groove to isolate the bottom of the battery system protection device 35 from the bottom of the sinking groove. The heat dissipation support component is utilized to support the bottom of the battery system protection device 35, thereby achieving effective heat dissipation of the bottom of the battery system protection device 35. Both the bottom and the top of the battery system protection device 35 can effectively dissipate heat, thereby achieving effective heat dissipation protection of the battery system protection device 35 .

[0034] On the basis of the above-mentioned embodiment, the specific implementation method of realizing the waterproof and dustproof connection of the protective box upper shell 1 and the protective box lower shell 2 is as follows: the bottom of the protective box upper shell 1 is concave, and a reinforcing rib 14 and a positioning column 11 are arranged at the bottom of the protective box upper shell 1. The reinforcing rib 14 is used to improve the structural strength of the protective box upper shell 1. A plurality of the positioning columns 11 are used to press on the upper part of the battery pack 4. In this specific embodiment, the battery pack 4 is composed of four batteries 41. In order to facilitate the top pressing and fixing of each battery 41, each battery 41 is positioned by two positioning columns 11 to achieve top pressing and positioning. An upper shell 14 is arranged on the left and right sides of the protective box upper shell 1. The wiring groove 13 is used to realize the reasonable routing of the wiring harness on the side of the upper shell 1 of the protective box. A plurality of grooves 15 are arranged on the bottom edge of the upper shell 1 of the protective box, and a convex edge 20 corresponding to the groove 15 is arranged on the upper edge of the lower shell 2 of the protective box. When the upper shell 1 of the protective box is buckled on the lower shell 2 of the protective box, the convex edge 20 is just inserted into the corresponding groove 15, so that the waterproof and dustproof function is realized by the matching relationship between the groove 15 and the convex edge 20. Furthermore, in order to facilitate the layout of the wiring harness in the lower shell 2 of the protective box, a lower shell wiring groove 28 corresponding to the upper shell wiring groove 13 is respectively arranged on the left and right sides of the lower shell 2 of the protective box.

[0035] On the basis of the above embodiment, in order to facilitate the fixation and smooth lead-out of the wiring harness in the lower shell wiring groove 28, a first wire card 24 and a wiring hole 25 are provided at the inner lower part of the lower shell wiring groove 28, and the wiring hole 25 is located obliquely above the first wire card 24. Two second wire cards 26 distributed up and down are provided in the lower shell wiring groove 28 located on the left side of the lower shell 2 of the protective box, and the second wire card 26 is located above the corresponding wiring hole 25. In this specific embodiment, the first wire card 24 and the second wire card 26 have the same structure, but the size is different. Specifically, the specific structure of the first wire card 24 is The two first wire clips 24 include two relatively arranged wire clip plates 241, and the wire clip plates 241 are L-shaped. A wire clip groove is formed between the two wire clip plates 241. The upper part of the wire clip groove is located at the entrance of the wire clip groove. The wire harness is pressed into the wire clip groove through the entrance of the wire clip groove. In order to facilitate the stable constraint of the wire harness by the wire clip groove, the width of the entrance of the wire clip groove can be made 1-2mm smaller than the diameter of the wire harness. Furthermore, in order to facilitate the smooth pressing of the wire harness into the entrance of the wire clip groove, an inclined sliding surface 242 is provided on the upper edge of the upper horizontal plate of the wire clip plate 241. The inclined sliding surface 242 is used to guide the wire harness to be smoothly inserted into the entrance of the slot and then enter the wire clip groove.

[0036] On the basis of the above embodiment, the protection device assembly 3 also includes a DC harness 34, a battery positive harness 31, a battery negative harness 33, and a charging harness 32; the DC harness 34, the battery positive harness 31, the battery negative harness 33 and the charging harness 32 are all electrically connected to the battery system protection device 35, and the DC harness 34 is used to transmit signals such as battery overtemperature and instrument power, and is connected to the external main line; the battery positive harness 31 and the battery negative harness 33 are connected to the battery pack 4, and the charging harness 32 is used to Connect an external charger; further, after the battery positive wiring harness 31, the battery negative wiring harness 33 and the charging wiring harness 32 are led out from the battery system protection device 35, the three wiring harnesses are first fixed by using the first wire clip 24 on the right, and then the charging wiring harness 32 is led out from the corresponding wiring hole 25, and the battery positive wiring harness 31 and the battery negative wiring harness 33 are then clamped and constrained by using two second wire clips 26, and the DC wiring harness 34 is clamped and fixed by using the first wire clip 24 on the left, and then led out from the wiring hole 25.

[0037] On the basis of the above embodiments, the specific implementation method of the heat dissipation support assembly is as follows: the heat dissipation support assembly includes a hollow support member 22, and the hollow support member 22 is in a field shape. The hollow support member 22 is fixedly arranged in the middle position of the bottom of the sunken groove, and the hollow characteristics of the hollow support member 22 are utilized to realize the isolation and heat dissipation of the bottom of the battery system protection device 35. The specific method of fixing the battery system protection device 35 on the hollow support member 22 is as follows: a mounting hole 351 is set at the upper left corner and the lower right corner of the bottom plate of the battery system protection device 35, and an internal threaded column corresponding to the mounting hole 351 is set on the hollow support member 22, and the bolt passes through the mounting hole 351 and is tightened in the internal threaded column to realize the fixation of the battery system protection device 35.

[0038] Furthermore, in order to facilitate the effective formation of the first heat dissipation gap 101, a supporting upright plate 23 is provided at each of the four top corners of the hollow support member 22, and the upper plane of the supporting upright plate 23 is flush with the upper plane of the supporting step 102. The supporting upright plate 23 and the supporting step 102 are used to realize the bottom support of the battery 41, and the upper and lower support limits of the battery 41 are realized by the combination of the positioning column 11, the supporting upright plate 23 and the supporting step 102. The vertical gap between the upper plane of the supporting upright plate 23 and the battery system protection device 35 constitutes the first heat dissipation gap 101.

[0039] In the present utility model, "upper", "lower", "front", "back", "left" and "right" are relative positions used to conveniently describe positional relationships, and therefore cannot be understood as absolute positions to limit the scope of protection.

[0040] Except for the technical features described in the specification, all other technical features are known technologies to those skilled in the art.

[0041] The above description in combination with the accompanying drawings has detailed the preferred implementation modes and embodiments of the utility model, but the utility model is not limited to the above implementation modes and embodiments. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the concept of the utility model, and these improvements and modifications should also be regarded as the protection scope of the utility model.

Claims

1. A two-wheeled electric vehicle battery system, characterized in that: It includes a protective box upper shell, a protective box lower shell, a protective device assembly, and a battery pack. The protective box upper shell adopts self-tapping screws to achieve fixed connection with the upper part of the protective box lower shell. The protective device assembly includes a battery system protection device. A sunken groove is arranged at the bottom of the inner side of the protective box lower shell. The battery system protection device is arranged in the sunken groove. A circle of supporting steps is arranged around the middle part of the inner side of the protective box lower shell. The battery pack is arranged in the middle and upper part of the inner side of the protective box lower shell, and the supporting steps are used to support the bottom periphery of the battery pack. A first heat dissipation gap is arranged between the upper part of the battery system protection device and the bottom of the battery pack. A heat dissipation support assembly is arranged at the bottom of the sunken groove to isolate the bottom of the battery system protection device from the bottom of the sunken groove.

2. A two-wheeled electric vehicle battery system according to claim 1, characterized in that: The bottom of the upper shell of the protection box is concave, and reinforcing ribs and positioning columns are arranged at the bottom of the upper shell of the protection box. Several of the positioning columns are used to press on the upper part of the battery pack, and an upper shell wiring groove is arranged on the left and right sides of the upper shell of the protection box.

3. A two-wheeled electric vehicle battery system according to claim 2, characterized in that A plurality of grooves are arranged on the bottom edge of the upper shell of the protection box, and convex edges corresponding to the grooves are arranged on the upper edge of the lower shell of the protection box.

4. A two-wheeled electric vehicle battery system according to claim 2, characterized in that A lower shell wiring groove corresponding to the upper shell wiring groove is respectively arranged on the left side and the right side of the lower shell of the protection box.

5. A two-wheeled electric vehicle battery system according to claim 4, characterized in that: A first wire card and a wiring hole are arranged at the lower inner part of the wiring groove of the lower shell, and the wiring hole is located obliquely above the first wire card. Two second wire cards distributed up and down are arranged in the wiring groove of the lower shell located on the left side of the lower shell of the protective box, and the second wire cards are located above the corresponding wiring holes.

6. A two-wheeled electric vehicle battery system according to claim 5, characterized in that: The protection device assembly also includes a DC wiring harness, a battery positive wiring harness, a battery negative wiring harness, and a charging wiring harness; the DC wiring harness, the battery positive wiring harness, the battery negative wiring harness, and the charging wiring harness are all electrically connected to the battery system protection device.

7. A two-wheeled electric vehicle battery system according to claim 1, characterized in that: The heat dissipation support assembly includes a hollow support member, which is in a field shape and is fixedly arranged at the middle position of the bottom of the sinking groove.

8. A two-wheeled electric vehicle battery system according to claim 7, characterized in that: A supporting plate is provided at each of the four top corners of the hollow supporting member, and the upper plane of the supporting plate is flush with the upper plane of the supporting step, and the vertical gap between the upper plane of the supporting plate and the battery system protection device constitutes the first heat dissipation gap.

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