TWI504043B - Sealing structure for battery - Google Patents

Description

Battery module packaging structure

The present invention relates to a package structure, and more particularly to a package of a battery module.

As oil prices rise and environmental awareness rises, traffic vehicles that use battery modules as a source of power as a means of transportation may become a future development trend. The aforementioned traffic vehicle is an electric vehicle product such as an electric bicycle, an electric motor vehicle or a petrol electric vehicle.

However, in wet areas, battery modules used in transportation vehicles are susceptible to moisture, resulting in a shortened battery module life. Especially when these electric vehicles encounter rainy days during travel, or water in the road area, moisture can easily penetrate into the battery module and cause damage to the battery module.

The invention provides a package structure of a battery module, and the connecting portion utilized can make the package box easy to assemble.

One embodiment of the present invention provides a package structure of a battery module, including a battery module and a package box, and the package box includes a box body, a cover body, and a connecting portion. The casing includes a base, a first side wall and a second side wall, wherein the first side wall and the second side wall protrude from the bearing surface of the base, and the first side wall and the second side wall are adjacent to each other. The first side wall has a first top surface, the second side wall has a second top surface, and the second top surface is spaced from the bearing surface by a distance greater than a distance from the first top surface to the bearing surface. The cover body has a cover surface and a first slope surface, wherein the slope top of the first slope surface extends from one side of the cover surface, wherein the angle formed by the cover body between the cover surface and the first slope surface is greater than 90 degrees , less than 180 degrees. The connecting portion is connected to the first top surface and the first slope surface, and the connecting portion includes at least one bent portion. When the cover body is covered by the box body, the cover surface and the second top surface face each other.

The package structure of the battery module provided by the invention is used for isolating the water vapor of the battery module from the outside, and reducing the probability of water vapor invading the battery module.

In order to further understand the technology, method and effect of the present invention, the following detailed description and drawings of the present invention are believed to be The accompanying drawings are only for the purpose of illustration and description and are not intended to limit the invention.

1‧‧‧Package box

10‧‧‧Box

100‧‧‧Base

101‧‧‧First side wall

101a‧‧‧ first top

101b‧‧‧ inner wall

101c‧‧‧ outer wall

102‧‧‧second side wall

102a‧‧‧Second top

1021‧‧‧ joint surface

1022‧‧‧Second slope

103‧‧‧First opening

11‧‧‧ Cover

110‧‧‧ Covered surface

111‧‧‧First slope

112‧‧‧ second opening

12, 12’, 12” ‧ ‧ Connections

120‧‧‧Bends

121‧‧‧First board

122‧‧‧Second plate

O‧‧‧ ridgeline

Θ‧‧‧ angle

123‧‧‧Reflexion

124‧‧‧ breach

W‧‧‧ breach width

L1‧‧‧First side wall length

125, 126‧‧‧ Connection unit

12a, 12'a‧‧‧ concave surface

12b, 12’b‧‧‧ convex surface

3‧‧‧ Sealing strip

14‧‧‧Outlet hole

2‧‧‧Battery module

21‧‧‧Wire

22‧‧‧Connector

1023‧‧‧ first gap

1103‧‧‧ second gap

1A is a perspective view showing the package structure of the embodiment of the present invention before being sealed.

Figure 1B shows a schematic cross-sectional view along line I-I of Figure 1A.

Fig. 1C shows a partial enlarged view of the connecting portion in the area A of Fig. 1A.

2A is a perspective view showing the sealed package of the embodiment of the present invention.

Fig. 2B shows a partial enlarged view of the package of Fig. 2A at the joint.

Fig. 3A shows a side view of the package after sealing according to another embodiment of the present invention.

Fig. 3B is a partial enlarged view of the package of Fig. 3A at the connecting portion.

Fig. 4 is a perspective view showing the package before sealing according to another embodiment of the present invention.

Please refer to FIG. 1A to FIG. 1C. 1A is a perspective view showing the package structure of the embodiment of the present invention before being sealed, and FIG. 1B is a cross-sectional view taken along line I-I of FIG. 1A. Fig. 1C shows a partial enlarged view of the connecting portion in the area A of Fig. 1A.

The package structure of the embodiment of the invention includes a package box 1 and a battery module 2. The structure of the package 1 before being sealed is described in detail below. The package 1 of the embodiment of the present invention is used for accommodating the battery module 2, and the package 1 includes a case 10, a cover 11, and a connecting portion 12. The material constituting the package 1 may be a plastic material, such as polyethylene (PE), polyethylene terephthalate (PET), polyvinyl Vinyl chloride (PVC), polypropylene (Polypropylene). , PP) and so on. The package 1 can be manufactured by injection molding, thermoforming, or compression molding, and the casing 10, the lid 11, and the connecting portion 12 are integrally molded.

Referring to FIGS. 1A and 1B , the casing 10 includes a base 100 , a first sidewall 101 , and a second sidewall 102 . The base 100 has a bearing surface (not shown). The bearing surface described in this embodiment refers to a plane having the lowest position inside the casing 10. The first side wall 101 and the second side wall 102 both protrude from the bearing surface, and the second side wall 102 and the first side wall 101 jointly surround the first opening 103. Moreover, in the embodiment of the present invention, the cover 11 has a second opening 112 at the cover surface 110. When the cover 11 is closed to the case 10, the first opening 103 and the second opening 112 together form an accommodation space. To accommodate the battery module 2. In another embodiment, the cover 11 is a plate that is directly covered by the casing 10.

As shown in FIG. 1B, the first side wall 101 has a first top surface 101a, an inner wall surface 101b, and an outer wall surface 101c. The inner wall surface 101b is adjacent to the bearing surface, and the outer wall surface 101c is opposed to the inner wall surface 101b. The first top surface 101a is connected between the inner wall surface 101b and the outer wall surface 101c.

Referring again to FIG. 1A, the second sidewall 102 is adjacent to the first sidewall 101, and the second sidewall 102 has a second top surface 102a. In an embodiment, the distance from the second top surface 102a to the bearing surface is greater than the distance from the first top surface 101a to the bearing surface. Referring to FIG. 1C, a partial enlarged view of a connecting portion of an embodiment of the present invention is shown. The second top surface 102a includes a joint surface 1021 and a second slope surface 1022, wherein the second slope surface 1022 is coupled between the joint surface 1021 and the first top surface 101a. That is, the top of the second slope 1022 extends from one side of the joint surface 1021, and the bottom of the second slope 1022 is connected to the first top surface 101a. The second slope 1022 can be a plane or a curved surface. That is, the angle formed by the second side wall 102 at the joint surface 1021 and the second slope surface 1022 is greater than 90 degrees and less than 180 degrees.

Referring to FIG. 1C , the cover body 11 has a cover surface 110 and a first slope surface 111 , and the slope top of the first slope surface 111 extends from one side of the cover surface 110 . In an embodiment, the cover surface 110 is a flat surface, and the first slope surface 111 may be a flat surface or a curved surface. When the cover surface 110 and the first slope surface 111 are planar, an angle θ is formed between the extending direction of the first slope surface 111 and the extending direction of the cover surface 110, and the angle θ is an obtuse angle. That is, the angle θ between the cover surface 110 and the first slope surface 111 of the cover 11 is greater than 90 degrees. And less than 180 degrees.

The connecting portion 12 is connected between the first top surface 101a and the first slope surface 111, and the connecting portion 12 includes at least one bent portion 120. Specifically, the connecting portion 12 is a slope bottom connected to the first slope surface 111 and a slope bottom portion of the second slope surface 1022. In the embodiment of the present invention, the connecting portion 12 includes a first plate body 121 and a second plate body 122, wherein the first plate body 121 is coupled to the first top surface 101a, and the second plate body 122 is coupled to the first slope surface 111. . Further, the first plate body 121 and the second plate body 122 are joined to form the aforementioned bent portion 120, and the bent portion 120 has a ridge line O.

Please refer to FIG. 2A and FIG. 2B. 2A is a perspective view of a package of the embodiment of the present invention, and the battery module 2 is housed in the package 1. Fig. 2B shows a partial enlarged view of the connecting portion of the B region of Fig. 2A.

As shown in FIG. 2B, when the cover body 11 is covered by the casing 10, the second plate body 122 is pivoted by the ridge line O, and the cover body 11 is turned over until the cover surface 110 and the second top surface 102a face each other. Specifically, the cover surface 110 faces the joint surface 1021 , and the first slope surface 111 faces the second slope surface 1022 . In addition, as shown in FIG. 2B, in the embodiment of the present invention, after the cover 11 is covered by the casing 10, a folded portion 123 is formed at the junction between the first plate 121 and the second plate 122.

It should be particularly noted that the foregoing second slope surface 1022 of the casing 10 and the first slope surface 111 of the cover body 11 can provide the connection portion 12 receiving space after the cover body 11 is covered by the casing 10. The connecting portion 12 is not caused to protrude too much from the outer wall surface 101c of the first side wall 101. In detail, in the closed state, the connecting portion 12 includes a concave curved surface 12a and a convex curved surface 12b opposed to the concave curved surface 12a, and the convex curved surface 12b is adjacent to the outer wall surface 110c.

Since the lid body 11, the casing 10 and the connecting portion 12 are integrally formed in the present embodiment, the folded portion 123 is usually subjected to a large stress after the lid body 11 is closed. Further, if the folded portion 123 protrudes from the outer wall surface 101c, it is also more susceptible to abrasion. Over time, it is possible to break at the fold-back portion 123 and reduce the effect of blocking moisture intrusion. In the embodiment of the present invention, the convex curved surface 12b has a large radius of curvature and can be dispersed and folded. The stress that 123 is subjected to. Further, the convex curved surface 12b is slightly convex on the outer wall surface 101c and the outer surface of the lid body 11, and the probability of the convex curved surface 12b being worn is reduced, thereby prolonging the time during which the material structure of the folding portion 123 is weakened.

Referring to FIGS. 1A and 2B, the package 1 may further include a sealing portion for completely sealing the package 1. In one embodiment, the sealing portion includes a sealing strip 3 that is disposed between the lid body 11 and the casing 10 when the lid body 11 is covered by the casing 10. Specifically, the weather strip 3 is interposed between the cover surface 110 and the second top surface 102a, and the first plate body 121, the second plate body 122, the first slope surface 111, and the second slope surface 1022 are formed. In the gap, the water vapor intrusion into the battery module 2 can be further reduced. The weather strip 3 is made of, for example, a material such as silicone or plastic.

Further, after the battery module 2 is placed in the package 1, the package 1 is sealed, for example, by a local heating method, and the joint between the lid 11 and the casing 10 is welded and sealed. The sealing of the package 1 can also provide energy to the joint surface 1021 and the cover surface 110 of the package 1 in a non-physical contact manner, so that the cover 11 and the joint of the case 10 are welded and sealed, and the non-physical contact is made. The manner may be an ultrasonic bonding technique, a laser welding technique, a heat-filling technique, or any combination of the above. In the foregoing embodiment, the material constituting the package 1 is a thermoplastic material. In another embodiment, the sealing portion further includes a waterproof glue filled in the gap formed between the cover 11, the case 10 and the connecting portion 12.

It should be particularly noted that in another embodiment, the package structure of the battery module may further include a container. A container, such as a waterproof bag or a waterproof case, is used to accommodate the sealed package 1 and provide further protection of the battery module in the package. In an embodiment, the waterproof case and the package of the embodiment of the present invention are the same in shape but different in size. In another embodiment, the cover of the waterproof case and the case are separable from each other, that is, the cover of the waterproof case and the case are not connected to each other as in the present case. In other embodiments, the battery module 2 can also be placed in a waterproof bag or a waterproof case, placed in the package 1 and sealed.

Referring to FIG. 2A again, in the embodiment of the present invention, the package 1 further includes a wire exit hole 14 for extending a wire 21 of the battery module 2 through the wire exit hole 14 to the outside of the package box 1. In an embodiment, the wire 21 and the hole wall of the outlet hole 14 are closely arranged to each other. Specifically, referring again to FIG. 1A, the battery module 2 includes a connector 22, and the wire 21 is, for example, a voltage line connected to the connector 22. The outlet hole 14 and the connector 22 may be located on the same side of the battery module 2 in consideration of wiring convenience. For example, the connector 22 is disposed at the bottom end of the battery module 22, and the outlet hole 14 is also located at the bottom of the package box 1. In addition, the package 1 may further include a glue material that is filled between the wire 21 and the gap formed by the wall of the outlet hole 14. The rubber material is, for example, an epoxy type encapsulant, an organic encapsulant, a polyurethane encapsulant, and an ultraviolet curing adhesive.

In the embodiment of the present invention, a recessed first notch 1023 is formed on the second top surface 102a, and a recessed second notch 1103 is formed on the cover surface 110 of the cover 11. The second notch 1103 corresponds to the position of the first notch 1023. When the cover 11 is covered by the case 10, the first notch 1023 and the second notch 1103 are combined to form the aforementioned outlet hole 14. When the gap between the cover body 11 and the casing 10 is sealed by the waterproof rubber, the gap between the wire 21 and the hole wall of the outlet hole 14 can be sealed.

Please refer to FIG. 3A and FIG. 3B. Fig. 3A shows a side view of the package after sealing according to another embodiment of the present invention. Fig. 3B is a partial enlarged view showing the connecting portion of the package in the C area of Fig. 3A. The same components in the embodiment as the previous embodiment will not be described again, and only the different portions will be described in detail. In the present embodiment, the connecting portion 12' includes a concave curved surface 12'a and a convex curved surface 12'b opposed to the concave curved surface 12'a. Unlike the previous embodiment, when the cover 11 is covered by the casing 10, the concave curved surface 12'a is adjacent to the outer wall surface 101c. In the present embodiment, the connecting portion 12' does not protrude from the side surface or the outer wall surface 101c of the lid body 11, and thus is less susceptible to abrasion.

Referring to FIG. 4, a perspective view of a package before sealing according to another embodiment of the present invention is shown. In the present embodiment, only the portions different from the previous embodiment will be described in detail. In this embodiment, the connecting portion 12" has at least one opening 124, and the width W of the breaking portion 124 is smaller than the length L1 of the first top surface 101a. In this embodiment, the breaking portion 124 is located in the cover body. 11 is at the junction with the first side wall 101, and the connecting portion 12" is divided into at least two connecting units 125, 126. Moreover, the two connecting units 125, 126 are disposed on the first top surface 101a of the first side wall 101. The front and rear ends are adjacent to the first side wall 101 and the second side wall 102.

In summary, the package of the battery module provided by the embodiment of the invention is used for isolating the water vapor of the battery module from the outside, and reducing the probability of moisture invading the battery module. Moreover, the cover body of the package box and the case body are connected by a connecting portion. When the cover body is closed to the case body, the cover body is easily aligned with the case body, which increases the convenience in assembly. In addition, since the lid body, the box body and the connecting portion are integrally formed, the connecting portion can assist in isolating moisture.

While the present invention has been described above by way of a preferred embodiment, it is not intended to limit the invention, and the equivalents of the modification and retouching are still in the present invention without departing from the spirit and scope of the invention. Within the scope of patent protection.

1‧‧‧Package box

10‧‧‧Box

100‧‧‧Base

101‧‧‧First side wall

102‧‧‧second side wall

102a‧‧‧Second top

103‧‧‧First opening

11‧‧‧ Cover

110‧‧‧ Covered surface

112‧‧‧ second opening

12‧‧‧Connecting Department

3‧‧‧ Sealing strip

2‧‧‧Battery module

21‧‧‧Wire

22‧‧‧Connector

1023‧‧‧ first gap

1103‧‧‧ second gap

Claims (17)

The package structure of the battery module comprises: a battery module; a package box for placing the battery module, wherein the package comprises: a box body, the box body comprises a base, a first side wall and a a second side wall, wherein the base has a bearing surface, and the first side wall and the second side wall protrude from the bearing surface, the second side wall is adjacent to the first side wall, wherein the second side wall a distance from the top surface to the bearing surface is greater than a distance from a first top surface of the first side wall to the bearing surface; a cover body having a cover surface and a first slope surface, the first The slope surface extends from one side of the cover surface, wherein the cover body has an angle between the cover surface and the first slope surface greater than 90 degrees, less than 180 degrees; and a connecting portion, the connection portion is connected to Between the first top surface and the first slope surface, the connecting portion includes a bent portion. When the cover body is covered by the box body, the cover surface and the second top surface face each other. The package structure of the battery module of claim 1, wherein the first side wall has an outer wall surface and an inner wall surface, and the first top surface is connected between the outer wall surface and the inner wall surface, when the cover body cover When the box is assembled, the connecting portion includes a concave curved surface and a convex curved surface opposite to the concave curved surface, and the convex curved surface is adjacent to the outer wall surface. The package structure of the battery module of claim 1, wherein the first side wall has an outer wall surface and an inner wall surface, and the first top surface is connected between the outer wall surface and the inner wall surface, when the cover body cover When the box is assembled, the connecting portion includes a concave curved surface and a convex curved surface opposite to the concave curved surface, and the concave curved surface is adjacent to the outer wall surface. The package structure of the battery module of claim 1, wherein the second top surface comprises a joint surface and a second slope surface, and the second slope surface is connected between the joint surface and the first top surface. The package structure of the battery module of claim 4, wherein the first slope surface and the second slope surface are curved surfaces or planes. The package structure of the battery module of claim 1, further comprising a sealing strip, the sealing strip being sandwiched between the cover surface and the second top surface when the cover is covered by the cover , so that the package of the battery module forms a waterproof structure. The sealing structure of the battery module according to claim 6, wherein the sealing strip is further sandwiched between the connecting portion, the first slope surface and the second slope surface. The package structure of the battery module of claim 1, wherein the connecting portion has at least one opening, the width of the opening is smaller than the length of the first top surface, and the opening is located at the cover body and the first side wall The junction between. The package structure of the battery module according to claim 8, wherein the breaking portion divides the connecting portion into at least two connecting units. The package structure of the battery module of claim 1, wherein the second side wall and the first side wall are coaxially connected with a first opening, and the cover mask has a second opening, when the cover is covered In the case of the casing, the first opening communicates with the second opening to form an accommodation space. The package structure of the battery module of claim 10, wherein the package further comprises an outlet hole, and when the battery module is placed in the accommodating space, a wire of the battery module passes through the outlet The holes extend outside the package. The package structure of the battery module of claim 11, further comprising a glue material, the glue material is filled in the hole and the hole wall of the outlet hole when the cover body is covered by the cover body Between the gaps. The package structure of the battery module of claim 1, further comprising a sealing portion, the sealing portion is located between the cover body and the box body when the cover body is covered by the box body, so that the battery module is The set of package boxes form a waterproof structure. The package structure of the battery module of claim 13, wherein the sealing portion further comprises a waterproof glue, the waterproof glue is filled in the case, the cover body and the cover body when the cover body is covered by the cover body Between the gaps formed by the connecting portions. The package structure of the battery module according to claim 13, wherein the sealing portion is formed by welding the case body and the cover body. The package structure of the battery module of claim 15, wherein the sealing portion is formed by providing energy fusion of the case and the cover in a non-physical contact manner. The package structure of the battery module of claim 1, further comprising a container for accommodating the package.