WO2021125409A1

WO2021125409A1 - Battery pack

Info

Publication number: WO2021125409A1
Application number: PCT/KR2019/018210
Authority: WO
Inventors: 이재상; 주승돈; 홍성진
Original assignee: 재상전자주식회사
Priority date: 2019-12-19
Filing date: 2019-12-20
Publication date: 2021-06-24
Also published as: KR102412009B1; KR20210079042A

Abstract

The present invention relates to a battery pack wherein a battery module (20) and a support plate (21) are received in a protection case (10) including an accommodation space (11) having open opposite sides and a first gasket (13) and a second gasket (23) installed at entrances of the accommodation space, and the opposite entrances of the accommodation space (11) are blocked by a support member (14) and an end case (25). In addition, circuit boards (22 and 24) are installed between the support plate (21) and the end case (25). According to the present invention, a primary waterproof structure is formed by the gaskets (13 and 23), and a secondary waterproof structure is formed by the support plate (21) and the end case (25), the distal ends of which are pressed, so that a double waterproof structure is applied to the circuit boards (22 and 24), and thus moisture is effectively prevented from being introduced to the circuit boards (22 and 24).

Description

battery pack

The present invention relates to a battery pack, and more particularly, to a battery pack in which first gaskets are provided on both sides of a battery module.

The number of transportation means having an internal combustion engine is gradually decreasing, and accordingly, the demand for hybrid vehicles and electric vehicles is increasing. In line with this trend, the demand for electric motorcycles and electric scooters that use only electric motors as driving power for two-wheeled vehicles used for short-distance movement is increasing, and the market is gradually expanding.

Conventionally, in order to charge the battery of an electric two-wheeled vehicle, a user rides the electric two-wheeled vehicle to a charging facility and then connects the charging cord to the battery to charge it, but there is a problem that the charging time takes a long time.

To solve this problem, a charging station equipped with a battery exchange device has been developed. The charging station is a module in which a plurality of battery exchange devices are installed in rows and columns, and batteries used in electric two-wheeled vehicles are inserted and charged in each exchange device.

The user removes the charged battery from the battery exchange device and replaces it with the battery of the electric motorcycle, and then inserts the battery taken out of the electric motorcycle into the battery exchange apparatus to charge it.

In the charging station of the above method, the user can save time for charging the battery of the electric two-wheeled vehicle because the charging station does not charge the battery and only needs to exchange the pre-charged battery with the discharged battery in the battery exchange device.

However, in such a battery, electronic components are also installed to prevent the cell installed inside the battery pack from exploding, but it is difficult to apply a waterproof structure to the electronic components installed outside the cell as well as the cell. there has been

In addition, the conventional battery pack has a problem in that the handle formed for replacement is fixed only to the case, so that it cannot withstand the weight of the battery pack itself and the connection portion between the handle and the case is damaged.

SUMMARY OF THE INVENTION An object of the present invention is to solve the conventional problems as described above, and to provide a battery pack having a waterproof structure so that moisture does not flow into a case in which a cylindrical cell is accommodated.

Another object of the present invention is to provide a battery pack having an improved structure of a handle for supporting the weight of the battery pack.

According to a feature of the present invention for achieving the object as described above, the present invention is provided with an accommodating space with open both sides, and a protective case in which a first gasket and a second gasket are respectively installed at the entrance of the accommodating space; a battery module accommodated in the accommodating space; a support member for pressing the first gasket by shielding one inlet of the accommodating space and supporting one side of the battery module; a support plate for supporting the other side of the battery module in the accommodating space; an end case for pressing the second gasket by shielding the other inlet of the receiving space and having a charging terminal; and a substrate installed between the support plate and the end plate.

A side wall protrudes along the edge of the support plate.

The end case has a shape corresponding to the cross-sectional shape of the protection case, is formed larger than the entrance of the accommodation space, shields one side of the entrance of the accommodation space, the end flange hung on the front end of the protection case; and an end adhesion rib that protrudes from the end flange toward the entrance of the accommodation space and is in close contact with the inner surface of the protective case, and the front end of the side wall and the tip of the end adhesion rib are in close contact to form a waterproof structure.

The substrate includes a first substrate installed inside the sidewall of the support plate, and a second substrate stacked with the first substrate inside the end adhesion rib of the end case and electrically connected to the charging terminal.

A fastening part into which a bolt is inserted is formed in the first gasket and the second gasket.

In the battery pack according to the present invention, the following effects can be obtained.

In the present invention, since the first and second gaskets coupled to both sides of the protective case are pressed in parallel to the installation direction, there is an effect of more effectively preventing moisture from flowing into the protective case.

In the present invention, a waterproof structure is formed in the first substrate and the second substrate by the second gasket, the partition wall of the support plate, and the close contact support rib of the end case. Accordingly, moisture flowing into the first substrate and the second substrate is effectively blocked.

In the present invention, the first substrate and the second substrate are formed to be stacked. Accordingly, there is an effect of increasing the efficiency of a narrow space within the battery pack having a shape extending to one side.

In the present invention, the fixing part of the handle is seated on the seating end of the support member fixed to the protective case, and the fixing part of the handle is fixed to the battery module and the protective case at the same time. Accordingly, the weight of the battery pack applied to the fixing part of the handle is evenly distributed to the support member, the protective case, and the battery module, thereby preventing the handle from being damaged, and stably supporting the weight of the battery pack.

1 is a perspective view of a battery pack of the present invention;

2 is an exploded perspective view of a battery pack constituting an embodiment of the present invention;

3 is a perspective view of a protective case constituting an embodiment of the present invention.

4 is a front view of a first gasket constituting an embodiment of the present invention;

5 is an exploded perspective view of the protective case and the support member constituting the embodiment of the present invention.

6 is an exploded perspective view of FIG. 5 viewed from another direction;

7 is an exploded perspective view of a support plate and a first substrate constituting an embodiment of the present invention;

8 is an exploded perspective view of a protective case and an end case constituting an embodiment of the present invention;

9 is an exploded perspective view of an end case and a second substrate constituting an embodiment of the present invention;

10 is an exploded perspective view of FIG. 9 viewed from another direction;

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same components are given the same reference numerals as much as possible even though they are indicated on different drawings. In addition, in describing the embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with the understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the components from other components, and the essence, order, or order of the components are not limited by the terms. When it is described that a component is “connected”, “coupled” or “connected” to another component, the component may be directly connected or connected to the other component, but another component is between each component. It will be understood that may also be "connected", "coupled" or "connected".

A preferred embodiment of the battery pack 1 of the present invention will be described with reference to the drawings.

First, the configuration of the battery pack 1 constituting the embodiment of the present invention will be described.

1 and 2, in the battery pack 1 of this embodiment, the protective case 10, the protective cover 10a, and the end cover 10b form the external appearance. A plurality of battery modules 20 are accommodated in the protective case 10, and a support member 14 having a handle 18 and a support plate 21 are installed on both sides of the plurality of battery modules 20, respectively. do. An end case 25 provided with a charging terminal 26 is further installed on the support plate 21 . The end case 25 may be formed integrally with the protective case 10 .

The protective cover 10a surrounds the outside of the support member 14 provided with the handle 18 , and the end cover 10b surrounds the outside of the end case 25 . The protective cover 10a and the end cover 10b may be uniformly formed of the same material and color as the protective case 10 for aesthetic elements. The battery pack 1 of the present invention does not necessarily require the protective cover 10a and the end cover 10b.

The protective case 10 has a hollow square pillar shape. The protective case 10 is provided with a receiving space 11 with both sides open. The battery module 20 and the support plate 21 are accommodated in the accommodating space 11 , and both open inlets of the protective case 10 are shielded by the support member 14 and the end case 25 . .

Referring to FIG. 3 , a plurality of fixing ribs 12 are formed on the inner surface of the protective case 10 . The fixing rib 12 protrudes toward the accommodating space 11 and is formed to be elongated in the longitudinal direction of the protective case 10 . The fixing rib 12 reinforces the strength of the protective case 10 . In addition, a bolt B1 is fastened to the front end of the fixing rib 12 to be coupled to the support member 14 .

A fixing groove 12a is formed at the front end of the fixing rib 12 . The bolt B1 is inserted into the fixing groove 12a so that the protective case 10 and the support member 14 are coupled. The fixing groove 12a may be formed over the entire fixing rib 12 as well as the tip of the fixing groove 12a.

Referring to FIG. 4 , a first gasket 13 is installed at one end of the protective case 10 . Specifically, a bolt installed between the front end of the protective case 10 and the support member 14, pressed by the protective case 10 and the support member 14, and inserted through the fixing groove 12a ( It is fixed by B1). The first gasket 13 may be formed to correspond to a cross-sectional shape of the protective case 10 and coupled to the bolt B1. The first gasket 13 prevents the inflow of moisture and foreign substances between the support member 14 and the protective case 10 .

A fastening part 13a protrudes inwardly from the first gasket 13 . A hole is formed in the fastening part 13a so that the bolt B1 passes therethrough. The first gasket 13 is coupled to the front end surface of the protective case 10 through a bolt B1 passing through the fastening portion 13a. The first gasket 13 and the second gasket 23 to be described later have the same shape.

5 and 6 , the support member 14 includes a support flange 15 and a support adhesion rib 17 . The support flange 15 is formed in a shape corresponding to the cross-sectional shape of the protective case 10 to shield one side of the entrance of the accommodation space (11). The support flange 15 is formed to be larger than the entrance of the accommodation space 11 and is caught on the tip of the protective case 10 . Accordingly, the front end of the protective case 10 forming the entrance edge of the accommodation space 11 is covered.

A case fixing hole 15a is formed along the edge of the support flange 15 . The case fixing hole 15a is formed at a position corresponding to the position of the fixing rib 12 . When the bolt B1 is inserted into the case fixing hole 15a, it passes through the first gasket 13 and is inserted into the fixing groove 12a of the fixing rib 12, and the protective case 10, The first gasket 13 and the support member 14 are fixed as one.

A seating end 16 is formed on the support flange 15 . The handle 18 is seated and fixed to the seating end 16 . The seating end 16 may be visually distinguished by a physical partition. For example, a wall may be formed along the edge of the seating end 16 , or the seating end 16 may be formed to be recessed or protruded from the support flange 15 to be partitioned.

A plate fixing hole 16a is formed at the seating end 16 . A fastening device (not shown) inserted through the plate fixing hole 16a is coupled to the battery module 20 . That is, the support member 14 is coupled to the protective case 10 by the bolt B1 and to the battery module 20 by the fastening device (not shown) at the same time. At this time, the fastening device inserted into the plate fixing hole 16a is also inserted into the handle 18 . Therefore, the protective case 10, the handle 18, and the battery module 20 are combined with the support member 14 so that the weight of the battery pack 1 is evenly distributed without being concentrated only on the handle 18. There is an effect that the damage of the handle 18 is prevented.

Case fixing holes 15a may be further formed on both sides of the plate fixing holes 16a in the seating end 16 . However, the present invention is not limited thereto, and considering the weight of the battery pack 1 , the plate fixing hole 16a may be further formed instead of the case fixing hole 15a.

A support adhesion rib 17 protrudes from the support flange 15 toward the entrance of the accommodation space 11 . The support and adhesion rib 17 is formed so that the cross-sectional shape corresponds to the shape of the entrance of the receiving space 11 . The support adhesion rib 17 is closely attached to the inner surface of the protective case 10 to maintain airtightness between the protective case 10 and the support member 14 .

A handle 18 is installed at the seating end 16 of the support member 14 . A user can lift the battery pack 1 by holding the handle 18 . Fixing portions 19 are formed at both ends of the handle 18 . The fixing part 19 has a hole in the shape corresponding to the plate fixing hole 16a and the case fixing hole 15a formed in the seating end 16 . The handle 18 is coupled to the support member 14 and the battery module 20 by a bolt B1 and a fastening device.

A plurality of battery modules 20 are accommodated in the accommodating space 11 of the protective case 10 . The battery module 20 is formed by gathering a plurality of cylindrical cells, and each cylindrical cell is connected in series or parallel to generate power. In the present invention, since the battery module 20 is not a main feature, a description thereof will be omitted.

One side of the battery module 20 is supported by the support member 14 , and the other side is supported by the support plate 21 . The support plate 21 has a shape corresponding to the cross-sectional shape of the accommodation space 11 . A temperature sensor, a humidity sensor, a current sensor, etc. for detecting an abnormality of the battery module 20 may be installed on the support plate 21 . The support plate 21 is coupled to the other side of the battery module 20 .

Referring to FIG. 7 , partition walls 21a are formed along the edge of the support plate 21 . The partition wall 21a protrudes in a direction perpendicular to the support plate 21, and when the support plate 21 is inserted into the accommodation space 11 to support the battery module 20, the partition wall ( 21a) is in close contact with the inner surface.

A seating space 21b having one side open is formed in the support plate 21 surrounded by one surface of the support plate 21 and the partition wall 21a. The first substrate 22 is seated in the seating space 21b.

A concave groove 21c is formed along the edge of the support plate 21 . The concave groove 21c is formed to prevent the fixing rib 12 formed inside the protective case 10 from interfering with the support plate 21 . That is, the concave groove 21c is formed so that the support plate 21 can be in close contact with the inner surface of the protective case 10 .

A wire passage groove 21d may be further formed at an edge of the support plate 21 . The wire passage groove 21d may allow a wire extending from the battery module 20 to pass through the support plate 21 and be electrically connected to a first substrate 22 or a second substrate 24 to be described later. The wire passage groove 21d serves to guide the wire and at the same time be in close contact with the outer surface of the wire to prevent vibration of the wire.

A pressure reducing groove 21e may be further formed at an edge of the support plate 21 . The pressure reducing groove 21e may be formed by recessing a portion of an edge of the support plate 21 or may have a structure in which a hole is drilled in the support plate 21 . The pressure reducing groove 21e has a problem in that when the support plate 21 enters the receiving space 11 of the protective case 10, the internal pressure increases and the support plate 21 is not properly fixed. formed to prevent it from happening.

A fastening hole 21f is formed in the support plate 21 . The fastening hole 21f is a hole into which a fastening device (not shown) is inserted to be coupled to the first substrate 22 . When only one fastening hole 21f is formed, the first substrate 22 can rotate relative to the support plate 21 with the fastening hole 21f as an axis, so that at least two fastening holes 21f are provided. It is preferable to form more than one.

A first substrate 22 is mounted on the support plate 21 . The first substrate 22 is disposed to face the entrance of the accommodation space 11 . That is, the support plate 21 is positioned between the first substrate 22 and the battery module 20 . Various electronic components are mounted on the first substrate 22 , and are connected to a connector provided on a wire extending from the battery module 20 . The first substrate 22 may sense temperature, humidity, current, voltage, etc. to the battery module 20 together with a second substrate 24 to be described later. In addition, a protection circuit, a fuse, or a resistor for protecting the battery module 20 from overvoltage and overcurrent may be further provided on the first substrate 22 .

Referring to FIG. 8 , a second gasket 23 is installed at the other end of the protective case 10 . Specifically, a bolt installed between the front end of the protective case 10 and the end case 25, pressed by the protective case 10 and the end case 25, and inserted through the fixing groove 12a ( It is fixed by B2). The second gasket 23 may be formed to correspond to a cross-sectional shape of the protective case 10 and coupled to the bolt B2. The second gasket 23 prevents the inflow of moisture and foreign substances between the end case 25 and the protective case 10 . The second gasket 23 has the same shape as the first gasket 13 and performs the same function.

The second substrate 24 is electrically connected to the first substrate 22 . The first substrate 22 and the second substrate 24 may be stacked and electrically connected by a vertical connector (not shown). When sufficient space is not secured inside the battery pack 1 , a plurality of substrates may be stacked and used. The second substrate 24 is electrically connected to the first substrate 22 . Like the first substrate 22 , the second substrate 24 may sense temperature, humidity, current, voltage, etc. to the battery module 20 . In addition, a protection circuit, a fuse, or a resistor for protecting the battery module 20 from overvoltage and overcurrent may be further provided on the second substrate 24 .

The end case 25 is mechanically and electrically connected to the support plate 21 . A charging terminal 26 and a second substrate 24 are mounted on the end case 25 . In addition, the end case 25 is also coupled to the protective case 10 to form the exterior of the battery pack (1). The end case 25 may be coupled in the same manner as the support member 14 is coupled to the protective case 10 .

The end case 25 is formed in a shape similar to that of the support member 14 . Specifically, the end case 25 is configured to include an end flange 25a and an end adhesion rib 25b. The end flange (25a) is formed in a shape corresponding to the cross-sectional shape of the protective case (10) to shield the other side of the entrance of the receiving space (11). The end flange (25a) is formed larger than the entrance of the receiving space (11) is caught on the front end of the protective case (10). At this time, the second gasket 23 is installed and pressed between the front end of the protective case 10 and the end flange 25a, and the protective case is secured by the bolt B2 fastened from the end flange 25a. (10), the second gasket 23 and the end flange 25a are coupled and fixed.

From the end flange (25a) toward the entrance of the receiving space (11), the end adhesion rib (25b) protrudes. The end adhesion rib 25b is formed to have a cross-sectional shape corresponding to the inlet shape of the receiving space 11 . The end adhesion rib 25b is closely attached to the inner surface of the protective case 10 to maintain airtightness between the protective case 10 and the end case 25 . The front end of the end contact rib 25b may be in close contact with the front end of the partition wall 21a of the support plate 21 in the receiving space 11 . With this structure, the first and

second substrates

22 and 24 installed between the support plate 21 and the end case 25 are protected by a double waterproof structure. Specifically, the structure in which the second gasket 23 is pressed against the protective case 10 and the end flange 25a serves as the first waterproof structure, and the partition wall 21a of the support plate 21 and the end case The structure in which the end adhesion ribs 25b of the are in close contact with each other may act as a second waterproof structure. In order to increase the effect of such a waterproof structure, a seal member may be further formed at the tip of the end adhesion rib 25b.

A terminal hole 25c is formed in the center of the end case 25 . A charging terminal 26 electrically connected to the second substrate 24 is inserted into the terminal hole 25c and exposed to the outside of the battery pack 1 so as to be coupled to the opposite terminal of the charging device.

Terminal fixing parts

25d and 19 are formed at the edge of the terminal hole 25c. The

terminal fixing parts

25d and 19 are formed inside the end case 25 . The mounting portion of the charging terminal 26 is seated on the

terminal fixing portions

25d and 19 and is fixed with a bolt B3.

Referring to FIG. 10 , a housing seating part 25e is formed on the opposite side of the end case 25 on which the

terminal fixing parts

25d and 19 are formed. The housing seating part 25e is formed on the outer surface of the end case 25, and the periphery of the terminal hole 25c is recessed. As the housing seating portion 25e is formed to be recessed, even if the terminal housing 27 is coupled to the end case 25 , the terminal housing 27 does not protrude from the outer surface of the end case 25 . .

The charging terminal 26 is exposed to the outside through the terminal hole 25c of the end case 25 . The charging terminal 26 is coupled to the opposite terminal of the charging device to charge the power of the battery module 20, or comes into contact with the opposite terminal of the vehicle to supply power to the vehicle. A mounting part for fixing the bus bar of the charging terminal 26 is integrally injection-molded on the charging part, and the mounting part is coupled to the

terminal fixing parts

25d and 19 with bolts B3. At the same time, the charging terminal 26 is seated in the mounting hole 24a formed in the second substrate 24 to be electrically connected to the second substrate 24 .

The terminal housing 27 is seated on the housing seating portion 25e of the end case 25 . The terminal housing 27 protects the charging terminal 26 exposed through the end case 25 . The terminal housing 27 has a central hole 27a formed in the center, is coupled to the end case 25 so as to communicate with the terminal hole 25c, and surrounds the edge of the charging terminal 26 .

Next, an assembling process of the battery pack 1 constituting the embodiment of the present invention will be described.

The battery module 20, the support member 14, and the handle 18 are coupled in order. Specifically, the battery module 20 is fitted inside the support and adhesion ribs 17 of the support member 14 , and the fixing part of the handle 18 is attached to the seating end 16 of the support member 14 . When (19) is seated, the fastening device (not shown) passes through the fixing part 19 and is fixed to the battery module 20 . Through the above process, the handle 18 is coupled to the battery module 20 with the support member 14 interposed therebetween, and the support member 14 is coupled to the protective case 10 . Accordingly, the support member 14, the handle 18, and the battery module 20 are all combined to form one component.

The battery module 20 is accommodated inside the receiving space 11 of the protective case 10 . In addition, the support flange 15 of the support member 14 is seated on one end of the protective case 10 , and the support adhesion rib 17 is in close contact with the inner surface of the protective case 10 . At this time, the first gasket 13 is inserted between the support flange 15 of the support member 14 and the tip of the protective case 10 and pressed.

When the support flange 15 is seated on the tip of the protective case 10 , a bolt B1 is inserted through the case fixing hole 15a to couple the support member 14 and the protective case 10 . When the support member 14 and the protective case 10 are completely coupled, the battery module 20 is attached to the support member 14 and the support plate 21 in the receiving space 11 of the protective case 10 . supported by

Meanwhile, the support plate 21 is assembled on the other side of the battery module 20 and inserted into the accommodation space 11 together with the battery module 20 . At this time, the first substrate 22 is seated in the seating space 21b of the support plate 21, and the wire extending from the battery module 20 is a wire through groove 21d of the support plate 21. It is electrically connected to the first substrate 22 through the .

As shown in FIG. 8 , when the support plate 21 is accommodated in the protective case 10 , the second gasket 23 and the second case are sequentially coupled to the other end of the protective case 10 . do.

Specifically, the charging terminal 26 is first coupled to the end case 25 through the terminal hole 25c, and the second substrate 24 and the terminal housing 27 are coupled in this order. When the assembly of the second substrate 24, the charging terminal 26, and the terminal housing 27 to the end case 25 is completed, the end of the end case 25 is located at the other end of the protective case 10. The flange 25a is seated, and the end contact rib 25b is in close contact with the inner surface of the protective case 10 . At this time, the second gasket 23 is inserted and pressed between the end flange 25a and the protective case 10, and the first substrate 22 and the second substrate 24 are connected to a substrate connector (not shown). electrically connected by

When the end flange (25a) is seated on the tip of the protective case (10), a bolt (B2) is inserted through a fixing hole (not shown) formed in the end case (25), and the end case (25), the second Both the gasket 23 and the protective case 10 are coupled. When the end case 25 and the protective case 10 are completely coupled, the protective cover 10a and the end cover 10b are coupled to the outer surface of the battery pack 1 to complete the assembly of the battery pack 1 . do.

In the above, even though all components constituting the embodiment according to the present invention have been described as being combined or operated in combination as one, the present invention is not necessarily limited to this embodiment. That is, within the scope of the object of the present invention, all the components may operate by selectively combining one or more. In addition, terms such as "comprises", "comprises" or "have" described above mean that the corresponding component may be inherent, unless otherwise stated, excluding other components. Rather, it should be construed as being able to further include other components. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless otherwise defined. Commonly used terms such as terms defined in the dictionary should be interpreted as being consistent with the contextual meaning of the related art, and are not interpreted in an ideal or excessively formal meaning unless explicitly defined in the present invention.

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

Claims

a protective case having an accommodating space opened at both sides and having a first gasket and a second gasket installed at an entrance of the accommodating space, respectively;

a battery module accommodated in the accommodating space;

a support member for pressing the first gasket by shielding one inlet of the accommodating space and supporting one side of the battery module;

a support plate for supporting the other side of the battery module in the accommodating space;

an end case for pressing the second gasket by shielding the other inlet of the receiving space and having a charging terminal;

A battery pack comprising a; a substrate installed between the support plate and the end plate.
The battery pack according to claim 1, wherein a side wall protrudes along an edge of the support plate.
The method of claim 2, wherein the end case is

an end flange formed to be larger than the entrance of the accommodating space in a shape corresponding to the cross-sectional shape of the protective case to shield one of the entrances of the accommodating space, and hung on the tip of the protective case;

and an end adhesion rib that protrudes from the end flange toward the entrance of the accommodation space and is in close contact with the inner surface of the protective case,

A battery pack in which a front end of the side wall and a front end of the end adhesion rib are in close contact to form a waterproof structure.
4. The method of claim 3, wherein the substrate is

a first substrate installed inside the side wall of the support plate;

and a second substrate stacked with the first substrate inside the end adhesion rib of the end case and electrically connected to the charging terminal.
The battery pack according to any one of claims 1 to 4, wherein a fastening part into which a bolt is inserted is formed in the first gasket and the second gasket.