CN216720136U - Battery cell module, battery and electric bicycle - Google Patents

Abstract

The embodiment of the disclosure provides a battery cell module, a battery and an electric bicycle. According to the battery cell module, the battery cell is arranged in the sealing box, the sealing box is arranged in the sealing cavity of the heat-shrinkable sleeve, and the sealing cover is sealed to block the mounting opening of the heat-shrinkable sleeve and is in sealing connection with the heat-shrinkable sleeve, so that the sealing box is sealed in the sealing cavity, the heat-shrinkable sleeve and the sealing cover can protect the sealing box, rainwater entering the shell component is prevented from flowing onto the sealing box, and the possibility that the sealing box is invaded by rainwater is reduced; meanwhile, the sealing box can protect the battery cell to prevent rainwater entering the sealing cavity from flowing onto the battery cell. Generally speaking, the relation of being connected of heat shrinkage bush and closing cap has water-proof effects, and the seal box also has water-proof effects, even then the rainwater enters into the inside of shell subassembly, also is difficult to enter into sealed intracavity through the installing port, and then more is difficult to enter into in the seal box to be favorable to avoiding electric core to wet, solved electric core module and invaded by the rainwater and lead to the problem of damage.

Description

Battery cell module, battery and electric bicycle

Technical Field

The embodiment of the disclosure relates to a battery technology, in particular to a battery cell module, a battery and an electric bicycle.

Background

Compared with the traditional manpower bicycle, the electric bicycle has the advantages of high speed, labor saving and the like, so that the electric bicycle is favored by people. Wherein, some current batteries include shell subassembly and electric core module usually, have the installation cavity in the shell subassembly, and the electric core module is installed in the installation cavity.

However, a large number of electric bicycles are placed outdoors for a long time, and outside rainwater easily enters the shell component and invades the inside of the battery cell module, so that the battery is easily short-circuited and damaged.

SUMMERY OF THE UTILITY MODEL

The embodiment of the disclosure provides a battery cell module, a battery and an electric bicycle, which are used for solving the problem that the external rainwater easily enters into a shell component and invades into the battery cell module to cause the battery to be easily short-circuited and damaged.

In one aspect, an embodiment of the present disclosure provides an electric core module, including: a battery core, a heat-shrinkable sleeve, a sealing cover and a sealing box,

a sealing cavity is formed in the heat-shrinkable sleeve, one end of the heat-shrinkable sleeve is provided with an installation opening communicated with the sealing cavity, and the other end of the heat-shrinkable sleeve is sealed;

the sealing cover is used for sealing the mounting opening and is in sealing connection with the heat-shrinkable sleeve;

the sealing box is positioned in the sealing cavity, and a closed space is formed inside the sealing box;

the battery cell is provided with at least one, and at least one battery cell is installed in the airtight space.

In a possible implementation manner, the sealing box includes a first box body and a second box body, and the first box body and the second box body are fastened and connected and jointly enclose an enclosed space for installing the battery cell.

In a possible implementation manner, the first box body is opposite to the second box body along a first direction, and the first direction is a length direction or a width direction of the cell module.

In a possible implementation manner, the battery cell is a square battery cell, the battery cell is provided with a plurality of battery cells, the plurality of battery cells are stacked into a plurality of stacks, and each stack of the battery cells is stacked along the height direction of the battery cell module;

at least one first clapboard and at least one second clapboard are arranged in the first box body, the first clapboard extends along the height direction of the battery cell module, each first clapboard is positioned between two adjacent stacks of battery cells, the second clapboard is perpendicular to the first clapboard, and the second clapboard separates two adjacent battery cells in each stack.

In a possible implementation manner, multiple stacks of the battery cells are sequentially arranged along a second direction, the second direction is a length direction or a width direction of the battery cell module, and the second direction is perpendicular to the first direction.

In a possible implementation manner, the battery management system further comprises a battery management system circuit board arranged on the battery core, and the battery management system circuit board is located in the second box and is used for being connected with a connector of the battery through a cable;

the second box body comprises a first side wall and a second side wall which are oppositely arranged, the first side wall is provided with a first part and a second part, and the distance between the first part and the second side wall is smaller than the distance between the second part and the second side wall; the second part and the battery cell jointly enclose a containing space for accommodating the cable.

In a possible implementation manner, a clamping groove is formed in the outer surface of one of the first box body and the second box body, a buckle is arranged on the outer surface of the other one of the first box body and the second box body, and the buckle is connected with the clamping groove in a clamped mode.

In a possible implementation manner, the portable box further comprises a fastening belt, and the fastening belt is sleeved outside the butt joint of the first box body and the second box body.

In one possible implementation, the fastening strip is a steel strip made of a steel material, an iron strip made of an iron material or a titanium alloy strip made of a titanium alloy material; and/or at least one lightening hole is arranged on the fastening belt.

In another aspect, embodiments of the present disclosure provide a battery including: the battery cell module that an aspect of this disclosed embodiment provided is enclosed with the second shell to first shell, second shell, first shell, the battery cell module is installed in the installation cavity.

In a possible implementation manner, one of the annular surface where the first housing and the second housing are butted and the annular surface where the second housing and the first housing are butted is provided with a waterproof groove, and the other is provided with a protrusion, the first housing and the second housing are detachably connected, and the protrusion is inserted into the waterproof groove.

In a possible implementation manner, the protrusion is connected with the groove wall of the waterproof groove in a sealing manner through a sealant.

In a possible implementation manner, a first limiting rib and a second limiting rib are convexly arranged on the inner surface of the first shell, and a third limiting rib and a fourth limiting rib are convexly arranged on the inner surface of the second shell;

the heat-shrinkable tube of the battery cell module is provided with a first side face and a second side face, the first side face is opposite to the second side face, the first side face abuts against the first limiting rib and the third limiting rib, the second side face abuts against the second limiting rib and the fourth limiting rib, one end of the heat-shrinkable tube abuts against the bottom wall of the first shell, and the other end of the heat-shrinkable tube abuts against the top wall of the first shell.

In a possible implementation manner, a first side surface of the heat-shrinkable sleeve is connected with a first gasket, and the first gasket abuts against the first limiting rib and the third limiting rib;

the second side surface of the heat-shrinkable sleeve is connected with a second gasket, and the second gasket is abutted against the second limiting rib and the fourth limiting rib;

one end of the heat-shrinkable sleeve is connected with a third gasket, and the third gasket is abutted against the bottom wall of the first shell; the other end of the heat-shrinkable sleeve is connected with a fourth gasket, and the fourth gasket is abutted to the top wall of the first shell.

In a possible implementation manner, the first gasket, the second gasket, the third gasket, and the fourth gasket are all silica gel gaskets.

In a possible implementation manner, the battery management system further comprises a connector, a first half groove is formed in the bottom of the first shell, a second half groove is formed in the bottom of the second shell, a groove for installing the connector is defined by the first half groove and the second half groove together, and the connector is electrically connected with a circuit board of the battery management system of the battery cell module.

In one possible implementation, a sealing gasket is further included, the sealing gasket being located between the connector and the groove.

In one possible implementation, the connector is directly opposite the cover.

In one possible implementation, the first housing is opposite to the second housing along a second direction.

In another aspect, an embodiment of the present disclosure provides an electric bicycle including: the frame and the battery that another aspect of this disclosed embodiment provided.

The embodiment of the disclosure provides an electric core module, a battery and an electric bicycle, wherein the electric core module is characterized in that an electric core is arranged in a sealing box, the sealing box is arranged in a sealing cavity of a heat-shrinkable sleeve, and a sealing cover is used for plugging a mounting opening of the heat-shrinkable sleeve and is in sealing connection with the heat-shrinkable sleeve, so that the sealing box is sealed in the sealing cavity, the heat-shrinkable sleeve and the sealing cover can protect the sealing box to prevent rainwater entering the interior of a shell component from flowing onto the sealing box, and the possibility that the sealing box is invaded by the rainwater is reduced; meanwhile, the sealing box can protect the battery cell to prevent rainwater entering the sealing cavity from flowing onto the battery cell. Generally speaking, the relation of being connected of heat shrinkage bush and closing cap has water-proof effects, and the seal box also has water-proof effects, even then the rainwater enters into the inside of shell subassembly, also is difficult to enter into sealed intracavity through the installing port, and then more is difficult to enter into in the seal box to be favorable to avoiding electric core to wet, solved electric core module and invaded by the rainwater and lead to the problem of damage.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is an overall schematic view of an electric bicycle in an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a battery in an embodiment of the present disclosure;

FIG. 3 is an exploded view of a battery according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a cell module in an embodiment of the present disclosure;

fig. 5 is a first exploded schematic view of a cell module according to an embodiment of the present disclosure;

fig. 6 is a second exploded schematic view of a battery cell module according to an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of a battery coupled to a first housing according to an embodiment of the present disclosure;

fig. 8 is a front view of a battery coupled to a first housing in an embodiment of the disclosure.

Description of reference numerals:

100. an electric bicycle;

10. a frame; 11. a front fork; 12. a rear fork;

20. a front wheel;

30. a rear wheel;

40. a saddle;

50. a battery;

51. a housing assembly; 510. a first housing; 5100. a sixth side wall; 5101. a first enclosure wall;

5102. a waterproof groove; 511. a second housing; 5110. a seventh side wall; 5111. a second enclosure wall;

512. a first limiting rib; 513. a second limiting rib; 514. a first connecting column;

52. a battery cell module; 520. heat-shrinkable tubing; 521. sealing the cover; 522. a sealing box;

5220. a first case; 5220a, a first separator; 5220b, a second separator;

5221. a second box body; 5221a, a first portion; 5221b, a second part;

523. an electric core; 524. a battery management system circuit board; 525. a fastening tape;

5250. lightening holes; 526. a first gasket; 527. a second gasket; 528. a third gasket;

529. a fourth gasket;

53. a handle assembly;

54. a connector; 540. a cable; 541. and sealing the gasket.

Specific embodiments of the present disclosure have been shown by way of example in the drawings and will be described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

Just as the background art said, electric bicycle is because of placing in the open air for a long time, and the rainwater enters into in the shell easily and invades inside the electricity core module, leads to the easy short circuit of battery and damages.

In view of the above problems, researchers thought to design the cell module to have a waterproof capability so as to prevent rainwater entering the case assembly of the battery from invading the inside of the cell module. Based on this concept, researchers thought to design a sealing box, and set the battery cell in the sealing box, and then set the battery cell wrapped with the sealing box in the heat-shrinkable sleeve, and the heat-shrinkable sleeve is sealed by the sealing cover. Like this, the dual protection has been realized to electric core to heat shrinkage bush and seal box for electric core module has good waterproof performance, even in the rainwater enters into shell subassembly, also is difficult to invade inside the electric core module, in order to do benefit to and avoid electric core module short circuit to appear.

The following describes technical solutions of embodiments of the present disclosure and how to solve the above technical problems in detail with specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present disclosure will be described below with reference to the accompanying drawings.

It is to be understood that the terms "central," "radial," "axial," "inner," "outer," "front," "rear," "upper," "lower," and the like are used in the appended drawings to indicate orientations and positional relationships, and are used for convenience in description and simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the embodiments of the present disclosure.

Fig. 1 is an overall schematic view of an electric bicycle 100 according to an embodiment of the present disclosure. Referring to fig. 1, an embodiment of the present disclosure provides an electric bicycle 100, in which the electric bicycle 100 is driven by electricity, and compared to a conventional manual bicycle, the electric bicycle does not require a rider to pedal a pedal device for driving, and is convenient and labor-saving to use. It should be noted that the electric bicycle 100 provided in this embodiment may be used as a sharing bicycle to provide the user with the sharing service of the electric bicycle 100, so that the user can go out conveniently.

Specifically, electric bicycle 100 includes a frame 10, and a front wheel 20, a rear wheel 30, a battery 50, an electric drive device, and a saddle 40 mounted on frame 10, frame 10 providing support for front wheel 20, rear wheel 30, electric drive device, and saddle 40 for seating a rider.

Optionally, the electric driving device may include a motor, a center shaft, a flywheel, a chain wheel, and a chain, wherein a shaft hole is formed in the middle of the frame 10, the center shaft is installed in the shaft hole, the chain wheel is sleeved on the center shaft, the flywheel is sleeved on the rear wheel shaft, the chain is wound around the flywheel and the chain wheel in a straddling manner, and the motor is electrically connected to the battery 50 and is used for driving the center shaft to rotate. When the electric bicycle 100 runs, the battery 50 provides electric energy for the motor, the motor drives the middle shaft to rotate, the chain wheel sleeved on the middle shaft drives the flywheel to rotate through the chain, the flywheel drives the rear wheel shaft and the rear wheels 30 to rotate, the front wheels 20 rotate along with the flywheel, and therefore the electric bicycle 100 can quickly run to a destination.

In the example shown in fig. 1, a pillar and a front fork 11 connected to a bottom end of the pillar are provided on the frame 10, and a front wheel shaft is provided at a wheel center of the front wheel 20, and the front wheel shaft is rotatably mounted on the front fork 11. The rear part of the frame 10 is connected with a rear fork 12, the wheel center of the rear wheel 30 is provided with a rear wheel shaft, and the rear wheel shaft is rotatably arranged on the rear fork 12. The frame 10 may further be provided with a battery compartment for accommodating the battery 50, and the battery compartment protects the battery 50. Wherein the battery compartment may be disposed below the saddle 40 and connected to the rear fork 12.

Fig. 2 is a schematic structural diagram of a battery 50 in an embodiment of the present disclosure, and fig. 3 is an exploded schematic diagram of the battery 50 in an embodiment of the present disclosure. Referring to fig. 2 and 3, embodiments of the present disclosure provide a battery 50, and the battery 50 may be a lithium battery or a lead-acid battery.

Above-mentioned battery 50 includes electric core module 52, shell subassembly 51 and handle subassembly 53, has the installation cavity in the shell subassembly 51, and electric core module 52 is installed in the installation cavity, and shell subassembly 51 is used for protecting the electric core module 52 of installing inside, and when battery 50 fell, shell subassembly 51 can protect electric core module 52 to avoid direct striking, and handle subassembly 53 is used for the user to grip to in battery 50 of taking. It should be noted that, in the embodiments of the present disclosure, the directions of the X axis, the Y axis, and the Z axis respectively represent the width direction, the length direction, and the height direction of the battery 50. Further, the width direction, the length direction, and the height direction of the cell module 52 coincide with those of the battery 50, and therefore, the directions of the X axis, the Y axis, and the Z axis also represent the width direction, the length direction, and the height direction of the cell module 52, respectively.

Fig. 4 is a schematic structural diagram of the cell module 52 in the embodiment of the present disclosure, fig. 5 is a first exploded schematic diagram of the cell module 52 in the embodiment of the present disclosure, and fig. 6 is a second exploded schematic diagram of the cell module 52 in the embodiment of the present disclosure. Referring to fig. 4 to 6, an embodiment of the present disclosure also provides a battery cell module 52, where the battery cell module 52 includes a battery cell 523 and a sealing box 522.

The battery cell 523 can store electric energy to supply power to a motor electrically connected to the battery 50. Here, when the battery 50 is a lithium battery, the battery cell 523 may be classified into a soft package battery cell, a square battery cell, or a cylindrical battery cell according to the structural shape. For example, in fig. 6, the cell 523 is square, that is, a square cell. The number of the battery cells 523 may be one or multiple. When the battery cell 523 is multiple, the battery cells 523 may be connected in parallel or in series, so that the battery 50 has more electric power.

The inside of the sealing box 522 has a sealed space, and the battery cell 523 is installed in the sealed space, so that the battery cell 523 can be completely wrapped by the sealing box 522. It can be seen that, a sealing box 522 is designed to wrap outside the battery cell 523, so that rainwater entering the casing assembly 51 cannot directly fall on the battery cell 523, and the battery cell module 52 can have waterproof performance. The shape and the size of the sealed box 522 are respectively adapted to the shape and the size of the battery cell 523, so that the sealed space in the sealed box 522 can be fully utilized. For example, when the battery cell 523 has a square shape, the sealing box 522 may have a rectangular parallelepiped shape.

In order to further improve the waterproof performance of the battery cell module 52, the battery cell module 52 may further include a heat-shrinkable sleeve 520 and a cover 521. Wherein, the inside of the heat-shrinkable sleeve 520 has a sealed cavity, and the battery cell 523 placed in the sealed box 522 is installed in the sealed cavity. That is, the heat shrink sleeve 520 surrounds the sealing box 522, and the sealing box 522 surrounds the battery cell 523.

And, the one end of heat shrinkage bush 520 is seted up the installing port with sealed chamber intercommunication, and the other end of heat shrinkage bush 520 is sealed, and the installing port is plugged up to closing cap 521, and closing cap 521 and heat shrinkage bush 520 sealing connection. So set up, sealed chamber is totally enclosed for seal box 522 is sealed at sealed intracavity completely, and like this, sealed chamber and seal box 522 have realized dual protection to electric core 523. Therefore, even when rainwater in the external environment enters the shell assembly 51, the rainwater is difficult to invade the inside of the sealed cavity, and then the rainwater is more difficult to invade the sealing box 522, so that the waterproof performance of the battery cell module 52 is greatly improved, and the problem that the battery cell 523 is damaged by the invasion of the rainwater is favorably solved.

It should be noted that the heat shrinkable sleeve 520 has the property of shrinking when exposed to heat; in addition, at normal temperature, the sealing box 522 can pass through the mounting port of the heat shrink sleeve 520, so that the sealing box 522 covering the battery cell 523 can be mounted in the heat shrink sleeve 520. Therefore, during installation, the battery cell 523 can be installed in the sealing box 522, the sealing box 522 with the battery cell 523 can be placed into the heat-shrinkable sleeve 520 from the installation opening, then the heat-shrinkable sleeve 520 is heated, the heat-shrinkable sleeve 520 is heated and shrunk, and then the sealing cover 521 and the heat-shrinkable sleeve 520 are hermetically connected.

Wherein the heat shrink 520 may have a shape that matches the shape of the capsule 522. For example, when the sealing case 522 has a rectangular parallelepiped shape, the heat shrinkable sleeve 520 may have a rectangular parallelepiped shape. Therefore, no gap exists between the heat-shrinkable sleeve 520 after being heated and shrunk and the sealing box 522, or the gap between the heat-shrinkable sleeve 520 after being heated and shrunk and the sealing box 522 can be smaller, and the gap between the sealing box 522 and the heat-shrinkable sleeve 520 can be filled with sealant.

Design like this, on the one hand, even lose the leakproofness between heat shrinkage bush 520 and the closing cap 521, do not have the space between seal box 522 and the heat shrinkage bush 520 yet and supply the rainwater to flow, then the rainwater is difficult to enter into the sealed intracavity, and then has reduced the risk in the rainwater invasion seal box 522, and on the other hand, seal box 522 is difficult to rock in the sealed intracavity, and then is favorable to reducing electric core 523 because of the possibility that the vibration leads to the damage.

Here, the capping 521 should be broadly construed to block the mounting opening. In one embodiment, it may be understood that the cap 521 is installed in the mounting opening and the cap 521 is sealingly connected to the inner wall of the mounting opening. In this embodiment, the shape and size of the cover 521 match the shape and size of the mounting opening. In another embodiment, it may also be understood that a cap 521 covers the mounting opening and sealingly engages the heat shrink 520. The sealing connection between the cover 521 and the heat shrinkable sleeve 520 may be achieved by providing an adhesive layer, and the sealing level between the cover 521 and the heat shrinkable sleeve 520 may reach, for example, IP54 protection level.

In summary, the battery cell module 52 provided by the embodiment of the present disclosure sets the battery cell 523 in the sealing box 522, and sets the sealing box 522 in the sealing cavity of the heat-shrinkable sleeve 520, and the sealing cover 521 blocks the mounting opening of the heat-shrinkable sleeve 520 and is connected to the heat-shrinkable sleeve 520 in a sealing manner, so that the sealing box 522 is sealed in the sealing cavity, and then the heat-shrinkable sleeve 520 and the sealing cover 521 can protect the sealing box 522 to prevent the rainwater entering the inside of the housing assembly 51 from flowing onto the sealing box 522, thereby reducing the possibility of the sealing box 522 being invaded by the rainwater; meanwhile, the sealing box 522 can protect the battery cell 523 to prevent rainwater entering the sealing cavity from flowing onto the battery cell 523. Generally speaking, the relation of connection of heat shrinkage bush 520 and closing cap 521 has water-proof effects, and seal box 522 also has water-proof effects, then even the rainwater enters into shell subassembly 51's inside, also is difficult to enter into sealed intracavity through the installing port, and then more is difficult to enter into in the seal box 522 to be favorable to avoiding electric core 523 to wet, solved electric core module 52 and invaded and lead to the problem of damage by the rainwater.

In fig. 6, when the battery cell 523 is plural, the battery cells 523 may be stacked in plural stacks, and each stack of the battery cells 523 may be stacked along a height direction (a Z-axis direction in fig. 6) of the battery cell module 52. That is to say, a plurality of batteries 523 are stacked and stacked in a stack along the height direction of the battery module 52, and a plurality of stacks of batteries 523 are provided in the sealing case 522. Thus, in fig. 6, when the number of the battery cells 523 in each stack is greater than the number of the stacks of the battery cells 523, the height of the battery cell module 52 is large, and the space of the installation cavity in the height direction is fully utilized, so that when the battery 50 is inserted into the battery compartment along the height direction, the projection area of the battery compartment on the horizontal plane is small, and the size of the electric bicycle 100 in the front-back direction or the left-right direction is small, so that the electric bicycle 100 has a good visual effect. The stacks of battery cells 523 may be sequentially disposed along the length direction of the battery cell module 52, or sequentially disposed along the width direction of the battery cell module 52 (for example, as shown in fig. 6), which is not limited in this embodiment.

The sealing box 522 may specifically include a first box 5220 and a second box 5221, where the first box 5220 and the second box 5221 are butted together, and they jointly enclose a sealed space for installing the battery cells 523.

The first case 5220 and the second case 5221 may be detachably coupled. Therefore, the first box 5220 and the second box 5221 can be detached from each other, and the battery cell 523 can be taken out of the sealed space, so as to facilitate maintenance and replacement.

In a first possibility, the first case 5220 and the second case 5221 may be butted in the height direction of the cell module 52, and the first case 5220 may be covered on the second case 5221. In a second possibility, the first case 5220 and the second case 5221 may be butted in the width direction of the cell module 52. In a third possibility, the first case 5220 and the second case 5221 may be butted along the length direction of the cell module 52. When the height of the cell module 52 is greater than the length and width of the cell module 52, each stack of stacked cells 523 is large, the depth of the first box 5220 and the second box 5221 in the first possibility is large, and the depth of the first box 5220 and the second box 5221 in the second possibility and the third possibility is small, so that the sealing box 522 is more easily sleeved outside the cells 523 in the second possibility and the third possibility.

The direction in which the first box 5220 and the second box 5221 are butted may be perpendicular to the direction in which the stacks of battery cells 523 are sequentially arranged. Specifically, when the first case 5220 and the second case 5221 are butted along the first direction, the stacks of battery cells 523 are sequentially arranged along the second direction, the first direction and the second direction are the width direction or the length direction of the battery cell module 52, and the first direction is perpendicular to the second direction. Exemplarily, in fig. 6, the first direction is a length direction of the cell module 52, and the second direction is a width direction of the cell module 52.

When the direction in which the first box 5220 and the second box 5221 are abutted is the same as the direction in which the multiple stacks of battery cells 523 are sequentially arranged, taking the example that the sealing box 522 is provided with two stacks, one stack of battery cells 523 in the two stacks can be completely accommodated in the first box 5220, and the other stack of battery cells 523 in the two stacks can be completely accommodated in the second box 5221. In this way, when the first box 5220 and the second box 5221 are disassembled, the stack of battery cells 523 is easily moved away from the other stack of battery cells 523 along with the first box 5220, so that the two stacks of battery cells 523 are easily disassembled. In the embodiment, the direction in which the first box body 5220 and the second box body 5221 are butted is designed to be perpendicular to the direction in which the stacks of the electric cells 523 are sequentially arranged, so that each electric cell 523 can be simultaneously located in the first box body 5220 and the second box body 5221, when the first box body 5220 and the second box body 5221 are disassembled, the stacks of the electric cells 523 cannot be separated along with the movement of the first box body 5220 or the second box body 5221, and the plurality of electric cells 523 can still form a whole, so that the connection relationship between the electric cells 523 is not damaged due to the separation of the stacked electric cells 523.

As described above, the sealing case 522 may have a rectangular shape, and accordingly, the opposite sides of the first case 5220 and the second case 5221 may have an open opening, and both the opening of the first case 5220 and the opening of the second case 5221 may have a rectangular shape. Specifically, the second box 5221 may include a first sidewall and a second sidewall opposite to each other, a third sidewall and a fourth sidewall opposite to each other, and a fifth sidewall opposite to the opening, wherein the third sidewall and the fourth sidewall are located between the first sidewall and the second sidewall.

When the sealing box 522 is rectangular, at least one first partition 5220a may be further disposed in the first box body 5220, the first partition 5220a extends along the height direction of the cell module 52, and each first partition 5220a is located between two adjacent stacks of cells 523, that is, the first partition 5220a separates two adjacent stacks of cells 523. At least one second separator 5220b may be further disposed in the first case 5220, wherein the second separator 5220b is perpendicular to the first separator 5220a, and the second separator 5220b is located between two adjacent cells 523 in each stack to separate the two adjacent cells 523 in each stack. For example, when two stacks of battery cells 523 are disposed in the sealed box 522, and four battery cells 523 are stacked in each stack, there are at least one first partition 5220a and at most three second partitions 5220 b.

With the above arrangement, the first partition 5220a and the second partition 5220b together partition the interior of the first case 5220 into a plurality of cavities, and a part of the battery cells 523 in each stack of battery cells 523 can be confined in one cavity, so that the battery cells 523 can be more tightly mounted in the sealed case 522.

In an implementation manner, the first case 5220 and the second case 5221 can be connected by a snap-fit manner. Exemplarily, a clamping groove is formed in an outer surface of one of the first box body 5220 and the second box body 5221, a buckle is arranged on an outer surface of one of the first box body 5220 and the second box body 5221, and the buckle can be clamped into the clamping groove and also can be separated from the clamping groove, so that the first box body 5220 and the second box body 5221 can be clamped together. Wherein, the buckle can be a plurality of, corresponding, the draw-in groove also can be a plurality of, a plurality of buckles and a plurality of draw-in grooves one-to-one, the joint relation increases, has strengthened the compactness of being connected of first box body 5220 and second box body 5221.

Specifically, referring to fig. 6, the battery cell module 52 may further include a fastening tape 525, and the fastening tape 525 is sleeved outside a joint of the first box 5220 and the second box 5221. Thus, in addition to the detachable connection manner, the first case 5220 and the second case 5221 can be fastened together by the fastening tape 525, which improves the reliability of the connection relationship between the first case 5220 and the second case 5221. Moreover, the fastening tape 525 is designed to fit over the interface between the first case 5220 and the second case 5221, as opposed to the fastening tape 525 encircling the entire peripheral side of the sealed case 522, which is advantageous in preventing the first case 5220 from disengaging from the second case 5221. Through the design fastening area 525, in the implementation scheme that there is less clearance and this clearance intussuseption is filled with sealed glue between heat shrinkable sleeve 520 and the seal box 522 after the shrink of being heated, fastening area 525 has occupied the partial clearance between seal box 522 and the heat shrinkable sleeve 520 for the sealed glue's that need fill volume in the clearance reduces, and then is favorable to reduce cost.

The material of the fastening tape 525 is not limited. For example, the fastening strip 525 may be made of a metal material such as steel, iron, titanium, or a titanium alloy. Thus, the fastening strap 525 has high structural strength, so that the fastening strap 525 can firmly fix the first case 5220 and the second case 5221. In addition, can also be equipped with at least one lightening hole 5250 on the fastening area 525 to do benefit to and alleviate the weight of fastening area 525, and then be favorable to avoiding electric core module 52 to lead to weight too big because of being equipped with fastening area 525.

The Battery cell module 52 may further include a Battery Management System (BMS) circuit board 524, and the BMS circuit board 524 is disposed on the Battery cell 523 and is configured to manage the Battery 50. Specifically, the battery 50 has a connector 54, the battery management system circuit board 524 may be connected to the connector 54 through a cable 540, and the connector 54 is configured to be detachably connected to a connector on the electric bicycle 100, so that the battery 50 is electrically connected to the motor through the connector 54 and the connector, thereby supplying power to the electric bicycle 100.

The sealing box 522 may have a first through hole, the heat shrink sleeve 520 may have a second through hole, one end of the cable 540 is connected to the battery management system circuit board 524, and the other end of the cable 540 sequentially extends out of the sealing cavity through the first through hole and the second through hole to be connected to the connector 54. It will be appreciated that a sealing ring is provided between the cable 540 and the first bore and between the cable 540 and the second bore, such that the sealing chamber and the sealing box 522 are both sealed.

In addition, the battery management system circuit board 524 may be located in the second case 5221, and the first sidewall of the second case 5221 has a first portion 5221a and a second portion 5221b, and the distance between the first portion 5221a and the second sidewall is smaller than the distance between the second portion 5221b and the second sidewall. Like this, when battery cell 523 is lived to seal box 522 parcel, battery cell 523 hugs closely with first part 5221a, has the accommodation space who supplies cable 540 holding between battery cell 523 and the second part 5221b, and then cable 540 between battery management system circuit board 524 and the connector 54 can be longer, and redundant cable 540 can be accomodate in accommodation space, is favorable to avoiding cable 540 too scattered.

In fig. 6, the first portion 5221a can be disposed adjacent to the opening of the first case 5220, and the second portion 5221b can be disposed adjacent to the fifth sidewall. In this example, the fastening tape 525 may contact the first portion 5221a of the first sidewall, and in this case, the fastening tape 525 may have a rectangular shape.

In the above embodiment, the housing assembly 51 may include the first housing 510 and the second housing 511, the first housing 510 and the second housing 511 are butted to each other, and the first housing 510 and the second housing 511 are detachably connected and jointly enclose the installation cavity. Thus, the first housing 510 and the second housing 511 can be detached, so that the battery 50 can be taken out of the mounting cavity to facilitate maintenance and replacement of the battery 50.

Fig. 7 is a schematic structural diagram illustrating the connection between the battery 50 and the first housing 510 according to the embodiment of the present disclosure, and fig. 8 is a front view illustrating the connection between the battery 50 and the first housing 510 according to the embodiment of the present disclosure. Referring to fig. 7 and 8, a waterproof groove 5102 is concavely formed on an annular surface of the first housing 510 facing the second housing 511 and abutting against the second housing 511, and a protrusion is convexly provided on an annular surface of the second housing 511 facing the first housing 510 and abutting against the first housing 510. When the first housing 510 and the second housing 511 are coupled together, the protrusion is inserted into the waterproof groove 5102.

Specifically, the side of the first housing 510 facing the second housing 511 has an opening, the first housing 510 includes a sixth side wall 5100 and a first surrounding wall 5101, the sixth side wall 5100 faces the opening of the first housing 510, the first surrounding wall 5101 is connected to a peripheral edge of the sixth side wall 5100, and a waterproof groove 5102 is provided on a side of the first surrounding wall 5101 facing the second housing 511. Similarly, the side of the second housing 511 facing the first housing 510 has an opening, the second housing 511 includes a seventh side wall 5110 and a second peripheral wall 5111, the seventh side wall 5110 faces the opening of the second housing 511, the second peripheral wall 5111 is connected to the peripheral edge of the seventh side wall 5110, and the protrusion is disposed on the side of the second peripheral wall 5111 facing the first housing 510.

Compared with the case that the abutting surface of the first housing 510 and the second housing 511 is a plane, in the present embodiment, the protrusion is formed on the abutting surface of the second housing 511, the waterproof groove 5102 matched with the protrusion is formed on the abutting surface of the first housing 510, and the matching relationship between the waterproof groove 5102 and the protrusion can also play a waterproof role, so that rainwater is not easy to flow into the installation cavity from between the waterproof groove 5102 and the contact surface of the protrusion.

Further, the protrusion is hermetically connected with the wall of the waterproof groove 5102 by a sealant. The sealant may be disposed on the wall of the waterproof trough 5102, or may be disposed on the protrusion. Alternatively, in some embodiments, the walls and protrusions of waterproof channel 5102 may be provided with a sealant.

So design, when first shell 510 links to each other with second shell 511, protruding cartridge is in waterproof groove 5102, and has sealed glue between protruding and waterproof groove 5102's the contact surface, sealed glue can prevent that the rainwater in the external environment from getting into the installation cavity between protruding and waterproof groove 5102's the contact surface, then shell subassembly 51's sealing performance is good, can realize waterproofly, like this, the rainwater is more difficult to enter into the inside of electric core module 52.

It can be understood that, the battery 50 in the embodiment improves the battery cell module 52, so that the battery cell module 52 has good waterproof performance, and also improves the casing assembly 51, so that the casing assembly 51 can also have good waterproof performance, so as to reduce the possibility that rainwater enters the casing assembly 51, and further, the problem that the battery 50 is damaged due to the fact that rainwater entering the casing assembly 51 invades the battery cell module 52 is solved.

The connection between the protrusion and the wall of the waterproof groove 5102 by the sealant should be understood in a broad sense, that is, the protrusion and the entire wall of the waterproof groove 5102 are connected by the sealant, and the joint between the first housing 510 and the second housing 511 is sealed by the sealant.

Alternatively, it is also understood that the protrusion is connected to a part of the wall of the waterproof groove 5102 by a sealant. Illustratively, only a portion of the waterproof groove 5102 near the upper portion of the cell module 52 in the height direction of the battery 50 is filled with the sealant, for example, the portion of the waterproof groove 5102 enclosed by a dashed line frame in fig. 8 is filled with the sealant. Thus, only a partial region of the first housing 510 is bonded to the second housing 511 by the sealant. The sealant can be filled in the waterproof groove 5102 by using a dispensing process.

The sealant can be, for example, a structural adhesive. By the design, the structural adhesive has the advantages of high strength and good durability, so that the sealing performance of the sealant is not easy to lose, and the shell assembly 51 can maintain the waterproof performance. The sealing grade between the first housing 510 and the second housing 511 can reach IP67 protection grade, for example.

In other embodiments of the present disclosure, the waterproof groove 5102 may also be formed on the annular face where the second housing 511 is butted against the first housing 510, that is, the waterproof groove 5102 is provided on the second peripheral wall 5111. At this time, a protrusion is correspondingly formed on the annular face where the first housing 510 and the second housing 511 are butted, that is, the protrusion is provided on the first surrounding wall 5101.

The present embodiment does not limit the connection manner of the first housing 510 and the second housing 511, for example, the first housing 510 and the second housing 511 may be screwed together by screws. As shown in fig. 3 and 8, a first connecting column 514 is disposed on the first housing 510, a second connecting column is disposed on the second housing 511, a through hole is disposed in the center of one of the first connecting column 514 and the second connecting column, a threaded hole is disposed in the center of the other of the first connecting column 514 and the second connecting column, and the central axes of the through hole and the threaded hole are parallel to the butt joint direction of the first housing 510 and the second housing 511. When the first housing 510 and the second housing 511 are butted, the through hole is coaxial with the threaded hole, and a screw passes through the through hole and then is matched with the threaded hole, so that the first housing 510 and the second housing 511 are screwed.

It should be noted that in the embodiment where the first housing 510 is screwed with the second housing 511 and the waterproof groove 5102 is filled with the sealant only in a partial area close to the top of the battery 50, if the housing assembly 51 needs to be detached, the screw can be screwed off first, and since only a partial area of the first housing 510 is bonded to the second housing 511 by the sealant, a force can be applied to the bottom of the first housing 510, so that the bottom of the first housing 510 moves away from the second housing 511 to separate the bottom of the first housing 510 from the bottom of the second housing 511, and the sealant of the first housing 510 is pulled to be easily detached from the second housing 511, thereby achieving detachment.

Wherein, first spliced pole 514 and second spliced pole all can be equipped with a plurality ofly, and a plurality of first spliced poles 514 set up along the circumference interval of first enclosure wall 5101, and a plurality of second spliced poles set up along the circumference interval of second enclosure wall 5111, a plurality of first spliced poles 514 and a plurality of second spliced pole one-to-one. Also, the first connecting column 514 is located within the first wall 5101, and the second connecting column is located within the second wall 5111.

The protrusion is provided with first spacing muscle 512 and the spacing muscle 513 of second on the internal surface of first shell 510, and first spacing muscle 512 and the spacing muscle 513 of second are located two relative walls of first shell 510, and first spacing muscle 512, the spacing muscle 513 of second, the roof of first shell 510 and the diapire of first shell 510 construct first spacing space jointly. The inner surface of the second housing 511 is convexly provided with a third limiting rib and a fourth limiting rib, the third limiting rib and the fourth limiting rib are positioned on two opposite walls of the second housing 511, and the third limiting rib, the fourth limiting rib, the top wall of the second housing 511 and the bottom wall of the second housing 511 form a second limiting space together.

The first limit space is communicated with the second limit space, and the battery cell module 52 is limited in the first limit space and the second limit space. With such an arrangement, when the battery cell module 52 is installed in the housing assembly 51, the first side surface of the heat-shrinkable sleeve 520 abuts against the first limiting rib 512 and the third limiting rib, the second side surface of the heat-shrinkable sleeve 520 abuts against the second limiting rib 513 and the fourth limiting rib, and the first side surface is opposite to the second side surface; meanwhile, the bottom end of the heat shrink sleeve 520 abuts against the bottom walls of the first and second housings 510 and 511, and the top end of the heat shrink sleeve 520 abuts against the top walls of the first and second housings 510 and 511. Thus, the cell module 52 can easily find the mounting position inside the casing assembly 51. Moreover, the battery cell module 52 is restricted in first spacing space and second spacing space for the battery cell module 52 is difficult to rock in the shell subassembly 51, so as to avoid the battery cell module 52 to lead to the damage because of the vibration.

Further, a first gasket 526 is further connected to a first side surface of the heat-shrinkable tube 520, so that when the battery 50 is installed in the first limiting space and the second limiting space, the first gasket 526 replaces the first side surface of the heat-shrinkable tube 520 to abut against the first limiting rib 512 and the third limiting rib. The second side of the heat-shrinkable sleeve 520 is further connected with a second gasket 527, so that when the battery cell module 52 is installed in the first limiting space and the second limiting space, the second gasket 527 replaces the second side of the heat-shrinkable sleeve 520 to abut against the second limiting rib 513 and the fourth limiting rib.

And, the bottom end of the heat-shrinkable sleeve 520 is connected with a third gasket 528, so that when the battery cell module 52 is installed in the first limiting space and the second limiting space, the third gasket 528 abuts against the bottom walls of the first housing 510 and the second housing 511. A fourth gasket 529 is attached to the top end of the heat shrink 520, and the fourth gasket 529 abuts against the top walls of the first and second housings 510 and 511.

Set up like this, above-mentioned gasket 526, 527, 528, 529 can prevent that the battery cell module 52 from becoming flexible for the battery cell module 52 can the chucking in first spacing space and the spacing space of second, has improved the installation stability of battery cell module 52.

The first gasket 526, the second gasket 527, the third gasket 528, and the fourth gasket 529 may be metal gaskets made of metal materials, or may be flexible gaskets (for example, silicone gaskets or plastic gaskets) made of flexible materials. Compare with the metal gasket, the light in weight of flexible gasket is favorable to alleviateing battery 50's weight, and is difficult for taking place the scratch between the internal surface of electric core module 52 and shell subassembly 51.

A plurality of first shims 526, second shims 527, third shims 528, and fourth shims 529 may be provided. From this, the locking effect of above-mentioned gasket 526, 527, 528, 529 to the battery cell module 52 can strengthen to further improve the installation stability of battery cell module 52 at shell subassembly 51. Specifically, in fig. 4 to 6, four first pads 526, four second pads 527, four third pads 528, and four fourth pads 529 are provided, where the four first pads 526 are located at four corner ends of the first side surface, the four second pads 527 are located at four corner ends of the second side surface, the four third pads 528 are located at four corner ends of the bottom wall of the heat shrinkable sleeve 520, and the four fourth pads 529 are located at four corner ends of the top wall of the heat shrinkable sleeve 520.

Furthermore, in one possible embodiment of the present disclosure, the first shim 526 and the third shim 528 may be securely connected, and both may be configured as "L" shaped shims. By joining the first shim 526 and the third shim 528 together, the strength of the first shim 526 and the third shim 528 may be advantageously increased. And the first gasket 526 and the third gasket 528 can be integrally formed into a whole, so that firstly, the process of assembling the first gasket 526 and the third gasket 528 is omitted, and secondly, the strength of the first gasket 526 and the third gasket 528 is improved on the premise of not increasing the cost. Of course, in some embodiments, the first shim 526 may also be connected to the fourth shim 529 and configured as an "L" shaped shim.

The second shim 527 and the fourth shim 529 can be securely attached, and can be configured as "L" shaped shims. By joining second shim 527 and fourth shim 529 together, it is advantageous to increase the strength of second shim 527 and fourth shim 529. And second gasket 527 and fourth gasket 529 can adopt integrated into one piece, like this, firstly saved the process of equipment second gasket 527 and fourth gasket 529, secondly under the prerequisite that does not increase the cost, be favorable to improving the intensity of second gasket 527 and fourth gasket 529. Of course, in some embodiments, the second and third shims 527, 528 may be configured as "L" shaped shims.

The first housing 510 and the second housing 511 may be opposite to each other in the width direction of the battery 50, or may be opposite to each other in the length direction of the battery 50. In one example of the present disclosure, the docking direction of the first housing 510 and the second housing 511 and the docking direction of the first case 5220 and the second case 5221 are perpendicular. That is, the first case 5220 and the second case 5221 are opposite in a first direction, and the first housing 510 and the second housing 511 are opposite in a second direction. For example, referring to fig. 3 and fig. 6, the first direction is a length direction of the cell module 52, and the second direction is a width direction of the cell module 52.

With continued reference to fig. 3, 7, and 8, the battery 50 may further include a connector 54, the connector 54 being electrically connected to the battery management system circuit board 524 via a cable 540, the connector 54 also being connected to a connection on the electric bicycle 100 that is intermediate the motor of the electric bicycle 100 and the battery 50 to enable the battery 50 to provide power to the motor. Illustratively, as shown in fig. 8, the bottom of the first housing 510 may be provided with a first half-groove, and the bottom of the second housing 511 may be provided with a second half-groove, the first half-groove and the second half-groove together defining a groove for the connector 54 to be mounted. So configured, the connector 54 is mounted to the bottom of the battery 50.

The connector 54 may be directly opposite to the cover 521 of the battery cell module 52. That is, along the height direction of the battery 50, the connector 54 is located at the bottom of the battery 50, and the cover 521 is also located at the bottom of the battery cell module 52. Like this, when battery 50 was along its direction of height cartridge in the battery compartment, even the rainwater can invade the installation intracavity from the top of shell subassembly 51, because the closing cap 521 is located the bottom of electric core module 52, consequently, the rainwater that gets into shell subassembly 51 also is difficult to invade the sealed intracavity from the mounting opening, is favorable to improving battery 50's waterproof performance. The cover 521 may also be recessed to form an avoiding groove, which is beneficial to avoiding the interference between the connector 54 and the cover 521.

Further, the battery 50 may further include a sealing gasket 541, the sealing gasket 541 being located between the connector 54 and the groove to close a gap between the connector 54 and the groove. Through setting up sealing gasket 541, sealing gasket 541 has played sealed effect, is favorable to avoiding the rainwater to invade the installation intracavity from the gap between connector 54 and the recess, has improved shell subassembly 51's waterproof performance to make the rainwater difficult inside of invading electric core module 52 from shell subassembly 51, so as to avoid electric core module 52 to wet the damage.

Wherein, the top of first shell 510 is equipped with the third half groove, and the top of second shell 511 is equipped with the fourth half groove, and the third half groove sets up with the fourth half groove relatively, and handle component 53 installs in the space that third half groove and fourth half groove were injectd jointly.

It should be further noted that, when the waterproof groove 5102 is provided on the first housing 510, as shown in fig. 8, since the first half groove is provided at the bottom of the first housing 510 and the third half groove is provided at the top of the first housing 510, the waterproof groove 5102 is interrupted by the first half groove and the third half groove, and the waterproof groove 5102 is divided into two grooves in a "U" shape. Similarly, when the waterproof trough 5102 is disposed on the second housing 511, the waterproof trough 5102 is broken by the second half-trough and the fourth half-trough because the second half-trough is disposed at the bottom of the second housing 511, and the fourth half-trough is disposed at the top of the second housing 511, so that the waterproof trough 5102 is also divided into two U-shaped troughs.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. The embodiments of the disclosure are intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (20)

1. The utility model provides a battery cell module for the battery, its characterized in that includes: a battery core, a heat-shrinkable sleeve, a sealing cover and a sealing box,

a sealing cavity is formed in the heat-shrinkable sleeve, one end of the heat-shrinkable sleeve is provided with an installation opening communicated with the sealing cavity, and the other end of the heat-shrinkable sleeve is sealed;

the sealing cover is used for sealing the mounting opening and is in sealing connection with the heat-shrinkable sleeve;

the sealing box is positioned in the sealing cavity, and a closed space is formed inside the sealing box;

the battery cell is provided with at least one, and at least one battery cell is installed in the airtight space.

2. The battery cell module of claim 1, wherein the sealing box comprises a first box body and a second box body, and the first box body and the second box body are fastened and connected to form a closed space for mounting the battery cell.

3. The cell module of claim 2, wherein the first casing and the second casing are opposite to each other along a first direction, and the first direction is a length direction or a width direction of the cell module.

4. The battery cell module of claim 3, wherein the battery cell is a square battery cell, the battery cell is provided with a plurality of battery cells, the plurality of battery cells are stacked in a plurality of stacks, and each stack of battery cells is stacked along the height direction of the battery cell module;

at least one first clapboard and at least one second clapboard are arranged in the first box body, the first clapboard extends along the height direction of the battery cell module, each first clapboard is positioned between two adjacent stacks of battery cells, the second clapboard is perpendicular to the first clapboard, and the second clapboard separates two adjacent battery cells in each stack.

5. The cell module of claim 4, wherein a plurality of stacks of the cells are sequentially arranged along a second direction, the second direction is a length direction or a width direction of the cell module, and the second direction is perpendicular to the first direction.

6. The battery cell module of claim 2, further comprising a battery management system circuit board disposed on the battery cell, the battery management system circuit board being located in the second casing and configured to be connected to a connector of the battery via a cable;

the second box body comprises a first side wall and a second side wall which are oppositely arranged, the first side wall is provided with a first part and a second part, and the distance between the first part and the second side wall is smaller than the distance between the second part and the second side wall; the second part and the battery cell jointly enclose a containing space for accommodating the cable.

7. The battery cell module of claim 2, wherein a clamping groove is formed in an outer surface of one of the first box body and the second box body, and a buckle is arranged on an outer surface of the other one of the first box body and the second box body and clamped with the clamping groove.

8. The battery cell module of any one of claims 2 to 7, further comprising a fastening tape, wherein the fastening tape is sleeved outside a joint of the first box body and the second box body.

9. The battery cell module of claim 8, wherein the fastening belt is a steel belt made of a steel material, an iron belt made of an iron material, or a titanium alloy belt made of a titanium alloy material; and/or at least one lightening hole is arranged on the fastening belt.

10. A battery, comprising: the battery cell module comprises a first shell, a second shell and the battery cell module as claimed in any one of claims 1 to 9, wherein the first shell and the second shell together enclose a mounting cavity, and the battery cell module is mounted in the mounting cavity.

11. The battery of claim 10, wherein one of the annular surface of the first housing abutting against the second housing and the annular surface of the second housing abutting against the first housing is provided with a waterproof groove, and the other is provided with a protrusion, the first housing is detachably connected with the second housing, and the protrusion is inserted into the waterproof groove.

12. The battery of claim 11, wherein the protrusion is connected with the wall of the waterproof groove in a sealing manner by a sealant.

13. The battery of claim 10, wherein a first limiting rib and a second limiting rib are convexly arranged on the inner surface of the first shell, and a third limiting rib and a fourth limiting rib are convexly arranged on the inner surface of the second shell;

the heat-shrinkable sleeve of the battery cell module is provided with a first side face and a second side face, the first side face is opposite to the second side face, the first side face abuts against the first limiting rib and the third limiting rib, the second side face abuts against the second limiting rib and the fourth limiting rib, one end of the heat-shrinkable sleeve abuts against the bottom wall of the first shell, and the other end of the heat-shrinkable sleeve abuts against the top wall of the first shell.

14. The battery of claim 13, wherein a first gasket is connected to the first side of the heat shrinkable sleeve, and the first gasket abuts against the first limiting rib and the third limiting rib;

the second side surface of the heat-shrinkable sleeve is connected with a second gasket, and the second gasket is abutted against the second limiting rib and the fourth limiting rib;

one end of the heat-shrinkable sleeve is connected with a third gasket, and the third gasket is abutted against the bottom wall of the first shell; the other end of the heat-shrinkable sleeve is connected with a fourth gasket, and the fourth gasket is abutted to the top wall of the first shell.

15. The battery of claim 14, wherein the first gasket, the second gasket, the third gasket, and the fourth gasket are silicone gaskets.

16. The battery of claim 10, further comprising a connector, wherein a first half groove is formed in a bottom of the first casing, a second half groove is formed in a bottom of the second casing, the first half groove and the second half groove together define a groove for mounting the connector, and the connector is electrically connected to a battery management system circuit board of the cell module.

17. The battery of claim 16, further comprising a sealing gasket located between the connector and the groove.

18. The battery of claim 16, wherein the connector is directly opposite the cover.

19. The battery of any of claims 10-18, wherein the first housing is opposite the second housing along a second direction.

20. An electric bicycle, comprising: a vehicle frame and a battery as claimed in any one of claims 10 to 19.

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