阅读说明：本技术 一种高安全性电动自行车用锂电池组 (Lithium battery pack for high-safety electric bicycle ) 是由 项卫胜 都伟云 骆峻 于可 姚伟 于 2021-07-19 设计创作，主要内容包括：本发明公开了一种高安全性电动自行车用锂电池组,包括：电池组外壳、位于电池组外壳内部的内胆,位于内胆内的电池模组,位于内胆外电池组外壳内的的保护电路,能够通过电路保护电池安全,避免因为元器件失效导致电池失控,所述保护电路包括放电保险丝、机械电源锁、充电保险丝、充电口以及放电口;能够保护受到外力挤压的电池组,避免了电池组受到挤压碰撞时电池受到强外力导致的失控；具有多重保护电路,降低因为元器件失效导致电池失控的风险；内胆塑料阻燃等级UL-94V0级,安全性更高。(The invention discloses a lithium battery pack for a high-safety electric bicycle, which comprises: the battery pack comprises a battery pack shell, an inner container positioned in the battery pack shell, a battery module positioned in the inner container and a protection circuit positioned outside the inner container and in the battery pack shell, wherein the protection circuit can protect the safety of the battery through a circuit and avoid the out-of-control of the battery caused by the failure of components, and comprises a discharge fuse, a mechanical power lock, a charge fuse, a charge port and a discharge port; the battery protection circuit has multiple protection circuits, and the risk of battery runaway caused by component failure is reduced; the flame retardant rating of the liner plastic is UL-94V0 grade, and the safety is higher.)

1. A lithium battery pack for a high-safety electric bicycle is characterized by comprising: the battery pack comprises a battery pack shell, an inner container positioned in the battery pack shell, a battery module positioned in the inner container and a protection circuit positioned outside the inner container and in the battery pack shell, wherein the protection circuit comprises a discharging fuse, a mechanical power lock, a charging fuse, a charging port and a discharging port;

the first end of the discharging fuse is connected with the battery module, the second end of the discharging fuse is connected with the first end of the mechanical power supply lock, the second end of the mechanical power supply lock is connected with the first end of the discharging port, the second end of the discharging port is connected with the battery module, the first end of the fuse is connected with the first end of the charging port, and the second end of the fuse and the second end of the charging port are respectively connected with the battery pack.

2. The lithium battery pack for the high-safety electric bicycle according to claim 1, wherein the battery module comprises two identical battery pack supports arranged symmetrically, a plurality of staggered circular through holes are formed in the battery pack supports, the diameter of each circular through hole is slightly smaller than that of each battery, two damping pieces arranged symmetrically are arranged between every two circular through holes, the damping pieces at the edges of the battery pack supports are larger than the damping pieces inside the battery pack supports, and the batteries are respectively arranged in the circular through holes.

3. The lithium battery pack for the high-safety electric bicycle according to claim 2, wherein the battery module further comprises a battery connecting mechanism located at the front side of the battery pack support, the battery connecting mechanism comprises two lead-out pieces, the lead-out pieces are respectively connected to the same-side electrodes of a row of batteries at the ends of the upper side and the lower side of the battery module, the battery connecting mechanism further comprises a plurality of connecting pieces, each connecting piece can be connected to the same-side electrodes of the two rows of batteries, and a connecting piece head extending to the outer end of the battery pack support is arranged at the left side of each connecting piece.

4. The lithium battery pack for the high-safety electric bicycle according to claim 2, wherein the battery module further comprises a discharge terminal mechanism located on the lower side of the battery pack support, the discharge port is located on the upper side of the discharge terminal mechanism, the discharge terminal mechanism comprises a discharge terminal housing, a discharge terminal hole penetrating through the discharge terminal housing is formed in the lower side of the discharge terminal housing, and a discharge terminal fixedly connected with the discharge port is arranged on the upper side of the discharge terminal hole.

5. The lithium battery pack for the high-safety electric bicycle according to claim 1, wherein the battery pack shell comprises an upper cover, a metal shell and a lower cover, a key hole is formed in the left side of the upper cover, the mechanical power lock is located in the key hole, the charging port is located in the right side of the upper cover, a U-shaped handle with an upward opening is arranged in front of the charging port and the key hole in the front side of the upper cover, the upper end of the U-shaped handle is rotatably connected with the upper cover, the rotary connection position of the U-shaped handle and the upper cover is located in front of the left side of the charging port, and a fixedly connected lock catch is arranged on the lower side of the upper cover.

6. The lithium battery pack for the high-safety electric bicycle according to claim 5, wherein the lower cover is provided with a discharge terminal cavity corresponding to the discharge terminal hole and penetrating through the lower cover.

7. The lithium battery pack for the high-safety electric bicycle according to claim 1, wherein the protection circuit further comprises a charge indicator board, a first end of the charge indicator board is connected with the charging fuse, and a second end of the charge indicator board is connected with a second end of the mechanical power lock.

8. The lithium battery pack for the high-safety electric bicycle according to claim 3, wherein the lead-out sheet and the connecting sheet are made of nickel-plated steel strips.

9. The lithium battery pack for the high-safety electric bicycle of claim 1, wherein the inner container is made of flame-retardant ABS.

Technical Field

The invention relates to the technical field of power electronics, in particular to a lithium battery pack for a high-safety electric bicycle.

Background

Lithium batteries are a type of battery using a nonaqueous electrolyte solution and using lithium metal or a lithium alloy as a negative electrode material, and can be roughly classified into two types: lithium metal batteries and lithium ion batteries. The lithium ion battery is characterized by containing no metallic lithium and having the chargeable characteristic, and the latest lithium metal battery has better safety, specific capacity, self-discharge rate and cost performance ratio than the lithium ion battery.

The lithium battery is widely seen in our lives, and is remarkably applied to electric bicycles, for example, a lithium battery for electric bicycles disclosed in chinese patent literature, whose publication number "CN 106450055A" includes a plurality of brackets closely arranged, so that a battery pack is quickly assembled, but the safety is not high due to unreasonable structural arrangement.

Disclosure of Invention

Therefore, the embodiment of the invention provides a high-safety lithium battery pack for an electric bicycle, which can protect the safety of the battery pack from a circuit and a battery pack structure and avoid the battery from being out of control.

In order to achieve the above object, an embodiment of the present invention provides the following:

a lithium battery pack for a high-safety electric bicycle includes: the battery pack comprises a battery pack shell, an inner container positioned in the battery pack shell, a battery module positioned in the inner container and a protection circuit positioned outside the inner container and in the battery pack shell, wherein the protection circuit can protect the safety of a battery through a circuit and avoid the out-of-control battery caused by the failure of components, and comprises a discharging fuse, a mechanical power lock, a charging fuse, a charging port and a discharging port;

the first end of the discharging fuse is connected with the battery module, the second end of the discharging fuse is connected with the first end of the mechanical power supply lock, the second end of the mechanical power supply lock is connected with the first end of the discharging port, the second end of the discharging port is connected with the battery module, the first end of the fuse is connected with the first end of the charging port, and the second end of the fuse and the second end of the charging port are respectively connected with the battery pack.

Preferably, the battery module includes two the same symmetrical arrangement's group battery support, be equipped with a plurality of staggered arrangement's circular through-hole on the group battery support, circular through-hole diameter slightly is less than the battery diameter, is equipped with two shock attenuation pieces of symmetrical arrangement between per two circular through-holes, and the shock attenuation piece size that is located group battery support edge is greater than the shock attenuation piece that is located group battery support inside, and the battery is adorned respectively in circular through-hole, can protect the group battery that receives external force extrusion, and the battery receives out of control that strong external force leads to when having avoided the group battery to receive extrusion collision.

Preferably, the battery module further comprises a battery connecting mechanism located on the front side of the battery pack support, the battery connecting mechanism comprises two lead-out pieces, the lead-out pieces are respectively connected to electrodes on the same side of a row of batteries at the tail ends of the upper side and the lower side of the battery module, the battery connecting mechanism further comprises a plurality of connecting pieces, each connecting piece can be connected to electrodes on the same side of the upper row of batteries and the lower row of batteries, and a connecting piece head extending to the outer end of the battery pack support is arranged on the left side of each connecting piece.

Preferably, the battery module further comprises a discharge terminal mechanism located on the lower side of the battery pack support, the discharge port is located on the upper side of the discharge terminal mechanism, the discharge terminal mechanism comprises a discharge terminal shell, a discharge terminal hole penetrating through the discharge terminal shell is formed in the left side of the discharge terminal shell, and a discharge terminal fixedly connected with the discharge port is arranged on the upper side of the discharge terminal hole.

Preferably, the battery pack shell comprises an upper cover, a metal shell and a lower cover, a key hole is formed in the left side of the upper cover, the mechanical power lock is located in the key hole, the charging port is located in the right side of the upper cover, the front side of the upper cover is located a U-shaped handle with an upward opening is arranged in front of the charging port and the key hole, the tail end of the upper side of the U-shaped handle is rotatably connected with the upper cover, the connecting position of the U-shaped handle and the upper cover is located in the left front side of the charging port, a lock catch fixedly connected is arranged on the lower side of the upper cover, a user can conveniently carry the battery pack shell for use, and the safety of the multiple locks is higher.

Preferably, the lower cover is provided with a discharge terminal cavity which penetrates through the lower cover and corresponds to the discharge terminal hole.

Preferably, the protection circuit further comprises an electric quantity indicating plate, wherein the first end of the electric quantity indicating plate is connected with the charging fuse, and the second end of the electric quantity indicating plate is connected with the second end of the mechanical power lock, so that a user can read the electric quantity conveniently.

Preferably, the lead-out sheet and the connecting sheet are both made of nickel-plated steel strips.

Preferably, the inner container is made of flame-retardant ABS, so that the flame-retardant grade can reach UL-94V0, and the safety is higher.

The embodiment of the invention has the following advantages:

(1) the battery pack extruded by external force can be protected, and the battery is prevented from being out of control caused by strong external force when the battery pack is extruded and collided; (2) the battery protection circuit has multiple protection circuits, and the risk of battery runaway caused by component failure is reduced; (3) the inner container plastic has the flame retardant rating of UL-94V0, the safety is higher (4), and the safety is higher by adding a balance design.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the invention, and do not limit the limit conditions of the invention, so that the invention has no technical essence, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the technical contents disclosed in the invention without affecting the efficacy and the achievable purpose of the invention.

Fig. 1 is a schematic diagram of a protection circuit of the present invention.

Fig. 2 is a schematic structural view of a battery module according to the present invention.

Fig. 3 is a schematic view of the structure of the discharge terminal housing of the present invention.

Fig. 4 is a schematic structural view of the upper cover of the present invention.

Fig. 5 is a bottom view of fig. 4.

Fig. 6 is a schematic structural view of the lower cover of the present invention.

Fig. 7 is a schematic structural view of the metal case of the present invention.

In the figure:

1-a battery module; 2-a discharge fuse; 3-mechanical power lock; 4-discharge port; 5-a charging port; 6-electric quantity display board; 7-a charging fuse; 8-a battery; 9-connecting pieces; 10-leading out a sheet; 11-a battery pack holder; 12-a discharge terminal housing; 13-discharge terminal holes; 14-a discharge terminal; 15-upper cover; 16-a keyhole; 17-U-shaped handles; 18-a charging port; 19-locking; 20-lower cover; 21-a discharge terminal cavity; 22-a metal housing; 23-damping sheet.

Detailed Description

While embodiments of the present invention will be described with reference to particular embodiments, those skilled in the art will readily appreciate that the present invention has additional advantages and benefits that may be realized from the teachings herein, and that the embodiments described are only a few, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In a first embodiment, as shown in fig. 1 to 7, the present invention provides a lithium battery pack for a high safety electric bicycle, including: the battery pack comprises a battery pack shell, an inner container positioned in the battery pack shell, a battery module 1 positioned in the inner container and a protection circuit positioned outside the inner container and in the battery pack shell, wherein the battery safety can be protected through the circuit, the battery is prevented from being out of control due to failure of components, and the protection circuit comprises a discharging fuse 2, a mechanical power lock 3, a charging fuse 7, a charging port 18 and a discharging port 4;

the first end of discharging fuse 2 links to each other with battery module 1, the second end of discharging fuse 2 links to each other with the first end of mechanical power lock 3, the second end of mechanical power lock 3 links to each other with the first end of discharge port 4, the second end of discharge port 4 links to each other with battery module 1, the first end of fuse links to each other with the first end of the mouth 18 that charges, the second end of fuse and the second end of the mouth 18 that charges link to each other with the group battery respectively, disconnection protection battery when circuit voltage is too big or electric current is too big.

Battery module 1 includes two the same symmetrical arrangement's group battery support 11, be equipped with a plurality of staggered arrangement's circular through-hole on group battery support 11, circular through-hole diameter slightly is less than the battery diameter, be equipped with two shock attenuation pieces 23 of symmetrical arrangement between per two circular through-holes, the shock attenuation piece 23 size that is located 11 edges of group battery support is greater than the shock attenuation piece 23 that is located 11 insides of group battery support, can effectually play the effect of bradyseism when receiving external force collision vibrations, the successive layer reduces the intensity of vibrations, protect inside battery, the battery is adorned respectively in circular through-hole, can protect the extruded group battery of receiving external force, the battery receives the out of control that strong external force leads to when having avoided the group battery to receive extrusion collision.

Battery module 1 is still including the battery coupling mechanism who is located 11 front sides of group battery support, battery coupling mechanism includes two and draws forth piece 10, it connects respectively on the homonymy electrode of the terminal row of battery in both sides about battery module 1 to draw forth piece 10, battery coupling mechanism still includes a plurality of connection pieces 9, the homonymy electrode of two rows of batteries about every connection piece 9 can be connected, every connection piece 9 left side is equipped with the connection piece head 24 that extends to 11 outer ends of group battery support, can connect the battery of certain figure, when some batteries break down, do not influence holistic use.

The battery module 1 further comprises a discharge terminal mechanism located on the lower side of the battery pack support 11, the discharge port 4 is located on the upper side of the discharge terminal mechanism, the discharge terminal mechanism comprises a discharge terminal shell 12, a discharge terminal hole 13 penetrating through the discharge terminal shell 12 is formed in the left side of the discharge terminal shell 12, and a discharge terminal 14 fixedly connected with the discharge port 4 is arranged on the upper side of the discharge terminal hole 13.

The battery pack shell comprises an upper cover 15, a metal shell 22 and a lower cover 20, a key hole 16 is formed in the left side of the upper cover 15, a mechanical power supply lock 3 is located in the key hole 16, a charging port 185 is located in the right side of the upper cover 15, a U-shaped handle 17 with an upward opening is formed in the front of the charging port 18 and the key hole 16 in the front of the front side of the upper cover 15, the upper end of the upper side of the U-shaped handle 17 is rotatably connected with the upper cover 15, the rotary connection position of the U-shaped handle 17 and the upper cover 15 is located in the left front side of the charging port 185, a lock catch 19 fixedly connected with the lower side of the upper cover 15 is arranged on the lower side of the upper cover 15, a user can conveniently carry and use the multiple lock is higher in safety.

The lower cap 20 is provided with a discharge terminal cavity 21 corresponding to the discharge terminal hole 13 and penetrating the lower cap 20.

Protection circuit still includes the electric quantity indicator board, and the first end of electric quantity indicator board links to each other with charging fuse 7, and the second end of electric quantity indicator board links to each other with the second end of mechanical power lock 3, and the person of facilitating the use reads the electric quantity.

The lead-out piece 10 and the connecting piece 9 are both made of nickel-plated steel strips.

The inner container is made of flame-retardant ABS, so that the flame-retardant grade can reach UL-94V0, and the safety is higher.

In a second embodiment, the battery housing is made of plastic and metal, and has a fire rating of UL94-V0, the discharge terminal housing 12 is made of PC/ABS and has a fire rating of UL94-V0, and the metal housing 22 is made of aluminum.

When the electric bicycle is used, the lithium battery pack is placed on the battery seat of the electric bicycle by using the U-shaped handle, the lock catch is opened, the mechanical power lock is opened by using the key, the lithium battery starts to discharge through the discharge port, the electric quantity indicating plate is lightened, current flows out from the battery through the connecting sheet and the leading-out sheet, and when the voltage or the current of a circuit is overlarge, the discharge fuse is fused and protects the battery; when charging is needed, the battery is charged through the charging port, and when the voltage or current of the circuit is overlarge, the charging fuse is fused to protect the battery; when one row of batteries is invalid, the other batteries continue to work through the connecting sheet and the leading-out sheet; when the extrusion collision happens, the shock absorption sheet plays a role in buffering, and the battery is protected from being damaged by hard collision.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.