CN107946515B - Battery pack and sealing mechanism thereof - Google Patents
Battery pack and sealing mechanism thereof Download PDFInfo
- Publication number
- CN107946515B CN107946515B CN201711429675.8A CN201711429675A CN107946515B CN 107946515 B CN107946515 B CN 107946515B CN 201711429675 A CN201711429675 A CN 201711429675A CN 107946515 B CN107946515 B CN 107946515B
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- Prior art keywords
- sealing strip
- sealing
- shell
- battery pack
- fixing bolt
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a sealing mechanism of a battery pack, which comprises: sealing strips and fixing bolts. The shape of the sealing strip is matched with the outline of the joint of the upper shell and the lower shell of the battery pack, and the sealing strip is assembled between the upper shell and the lower shell. The fixing bolts penetrate through the upper shell, the sealing strip and the lower shell to fix the upper shell, the sealing strip and the lower shell together. The sealing strip is provided with a lip structure at the position corresponding to the fixing bolt. The invention also discloses a battery pack using the sealing mechanism. The sealing mechanism of the battery pack adopts an assembled sealing scheme and is assembled through bolts. The cross-section structure of the sealing strip forms a plurality of sealing surfaces, and the sealing is carried out by the structure auxiliary material, so that the requirement on the property of the material is reduced. The sealing strip is manufactured in a sectional splicing mode, and the sealing strip is provided with a limiting mechanism.
Description
Technical Field
The invention relates to the field of automobile parts, in particular to a battery pack structure of an electric automobile.
Background
The high-voltage battery of the electric automobile has higher requirements on the sealing capability of the system, particularly the battery pack, such as the requirement of IP67 for dust prevention and water prevention. The implementation of the battery pack sealing requirement depends on the sealing scheme of the battery pack at the assembly position of the upper and lower shells in addition to the sealing performance of the upper and lower shells.
In the prior art, the sealing scheme of the assembly part of the upper shell and the lower shell mainly comprises the following steps:
there are many existing technical routes, mainly:
1) The upper shell and the lower shell are directly glued by sealant. In this way, the upper and lower housings are bonded directly using a sealant. The mode has the advantages of strong adaptability and lower requirements on the machining precision of the upper shell and the lower shell. The disadvantage is that after-sales maintenance is difficult and the maintenance cost is high.
2) And the upper shell and the lower shell are sealed by forming an elastomer as a sealing strip after being solidified by single-component or double-component materials. The advantage of this approach is that it is relatively easy to handle, since the elastomer is already glued to the upper cover or lower housing during assembly. The sealing strip has the defects that the cross section structure of the used sealing strip is simpler, the sealing contact points are fewer, the sealing effect is mainly represented by the characteristics of the material rather than the structure, and therefore, the requirements on the material are mainly high in the requirements on the elasticity and the sealing property of the material.
3) The sealing strip is assembled by adopting a solid structure (the cross section is rectangular). According to this scheme, a plate-type rubber sealing material (foam rubber/solid rubber material) is cut and then bonded to form a closing seal strip. The sealing strip in the mode is simple to assemble and convenient to disassemble, and particularly has lower maintenance cost in the after-sales field. The disadvantage is that the sealing capacity of the sealing strip is completely dependent on the sealing properties of the material, for which high demands are made, the material with good sealing properties is relatively expensive. In addition, as the sealing material is of a uniform section, a block cementing mode is often adopted due to the economic consideration, and the structure causes the problem of inconsistent ageing speed of the sealing strip and the hidden trouble of local failure.
Disclosure of Invention
The invention aims to provide a sealing mechanism of a battery pack, which is convenient to manufacture and assemble and has a good sealing effect.
According to an embodiment of the present invention, there is provided a sealing mechanism of a battery pack, including: sealing strips and fixing bolts. The shape of the sealing strip is matched with the outline of the joint of the upper shell and the lower shell of the battery pack, and the sealing strip is assembled between the upper shell and the lower shell. The fixing bolts penetrate through the upper shell, the sealing strip and the lower shell to fix the upper shell, the sealing strip and the lower shell together. The sealing strip is provided with a lip structure at the position corresponding to the fixing bolt.
In one embodiment, the upper shell is provided with a circular via hole, the lower shell is provided with a threaded hole, the sealing strip is provided with an elliptical hole, the positions of the via hole, the elliptical hole and the threaded hole are corresponding, and the corresponding via hole, elliptical hole, threaded hole and fixing bolt form a fixed point. The screw thread part of the fixing bolt penetrates through the through hole on the upper shell and the elliptical hole on the sealing strip and is screwed into the threaded hole on the lower shell, and the head of the fixing bolt is tightly pressed on the upper shell.
In one embodiment, no fixing points are provided at the corners of the upper housing, the sealing strip and the lower housing, which are convex or concave.
In one embodiment, the cross-sectional structure of the sealing strip comprises: a central portion, an edge portion, an upper lip and a lower lip. The central portion has a first thickness. The edge portion extends from the central portion to both sides, the edge portion having a second thickness. At the top of the sealing strip, at the junction of the central portion and the edge portion, an upwardly open bowl-shaped upper lip is formed. At the bottom of the sealing strip, at the interface of the central portion and the edge portion, a downwardly projecting lower lip is formed.
In one embodiment, the width of the central portion matches the size of the fixing bolt. The width of the edge portion of each side is 1/3 to 1/2 of the width of the central portion. The second thickness is 1/2-2/3 of the first thickness.
In one embodiment, the upper lip opens at an angle of 20 ° to 30 °. The lower lip is a hemisphere with a diameter of 1/8-1/6 of the first thickness. The height from the bottom of the lower lip to the top of the upper lip is 2-3 times the first thickness.
According to an embodiment of the present invention, there is provided a battery pack including: upper and lower shells, sealing strip, and fixing bolt. The upper case and the lower case are assembled with each other to form the outer case of the battery pack. The shape of the sealing strip is matched with the outline of the joint of the upper shell and the lower shell of the battery pack, and the sealing strip is assembled between the upper shell and the lower shell. The fixing bolts penetrate through the upper shell, the sealing strip and the lower shell to fix the upper shell, the sealing strip and the lower shell together. The sealing strip is provided with a lip structure at the position corresponding to the fixing bolt.
In one embodiment, the upper shell is provided with a circular via hole, the lower shell is provided with a threaded hole, the sealing strip is provided with an elliptical hole, the positions of the via hole, the elliptical hole and the threaded hole are corresponding, and the corresponding via hole, elliptical hole, threaded hole and fixing bolt form a fixed point. The screw thread part of the fixing bolt penetrates through the through hole on the upper shell and the elliptical hole on the sealing strip and is screwed into the threaded hole on the lower shell, and the head of the fixing bolt is tightly pressed on the upper shell. The upper shell or the lower shell is provided with a limiting piece, and the limiting piece limits the interval between the upper shell and the lower shell after the upper shell and the lower shell are assembled. No fixing points are arranged at the convex or concave corners of the upper shell, the sealing strip and the lower shell.
In one embodiment, the cross-sectional structure of the sealing strip comprises: a central portion, an edge portion, an upper lip and a lower lip. The central portion has a first thickness that matches the height of the stop, and the width of the central portion matches the size of the fixing bolt. The edge portions extend from the central portion to both sides, the width of the edge portion of each side being 1/3 to 1/2 of the width of the central portion, the edge portion having a second thickness, the second thickness being 1/2 to 2/3 of the first thickness. At the top of the sealing strip, a bowl-shaped upper lip edge which is opened upwards is formed at the junction of the central part and the edge part, and the opening angle of the upper lip edge is 20-30 degrees. At the junction of the bottom, the central part and the edge part of the sealing strip, a downward protruding lower lip is formed, the lower lip is a hemisphere, and the diameter is 1/8-1/6 of the first thickness. The height from the bottom of the lower lip to the top of the upper lip is 2-3 times the first thickness.
In one embodiment, the sealing strip is formed by splicing a plurality of straight line segments and a plurality of corner segments, the straight line segments are molded by a straight line mold, the corner segments are molded by a corner mold, and the corner segments are connected with the molded straight line segments by molding when the corner mold molds the corner segments.
The sealing mechanism of the battery pack adopts an assembled sealing scheme and is assembled through bolts. The cross-section structure of the sealing strip forms a plurality of sealing surfaces, and the sealing is carried out by the structure auxiliary material, so that the requirement on the property of the material is reduced. The sealing strip is manufactured in a sectional splicing mode, and the sealing strip is provided with a limiting mechanism.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description of embodiments taken in conjunction with the accompanying drawings in which like reference characters designate like features throughout the drawings, and in which:
fig. 1 discloses a schematic structure of a battery pack according to an embodiment of the present invention.
Fig. 2 discloses a schematic cross-sectional view of a sealing strip in a sealing mechanism of a battery pack according to an embodiment of the present invention.
Fig. 3 is a schematic view showing the structure of the sealing strip and the lower case in the sealing mechanism of the battery pack according to an embodiment of the present invention.
Fig. 4 is a schematic view showing the structure of the upper stopper of the lower case in the sealing mechanism of the battery pack according to an embodiment of the present invention.
Detailed Description
Referring to fig. 1, fig. 1 discloses a schematic structure of a battery pack according to an embodiment of the present invention. The battery pack includes: upper and lower housings 102, 104, sealing strip 106, and fixing bolt 108. The upper case 102 and the lower case 104 are assembled with each other to form the outer case of the battery pack. The upper housing 102 and the lower housing 104 have mating contours, particularly at the junction of the upper housing 102 and the lower housing 104, the contours of the upper housing 102 and the lower housing 104 match. The specific shape of the upper and lower cases 102 and 104 is determined according to the vehicle model to which it is applied, without limitation. The shape of the sealing strip 106 matches the contour of the junction of the upper case 102 and the lower case 104 of the battery pack, and the sealing strip 106 is fitted between the upper case 102 and the lower case 106. The upper housing 102, the sealing strip 106 and the lower housing 104 are assembled by fixing bolts 108. Specifically, the fixing bolts 108 pass through the upper case 102, the sealing strip 106, and the lower case 104, fixing the upper case 102, the sealing strip 106, and the lower case 104 together. The threaded portion of the fixing bolt 108 is threaded into the threaded hole in the lower housing 104 through the through hole in the upper housing 102 and the elliptical hole in the sealing strip 106, and the head of the fixing bolt 108 is pressed against the upper housing 102.
To achieve the fixing by the fixing bolt 108, in one embodiment, the upper housing 102 is provided with a circular via hole, the lower housing 104 is provided with a threaded hole, and the sealing strip 106 is provided with an elliptical hole. The positions of the through holes, the elliptical holes and the threaded holes are corresponding, and the corresponding through holes, elliptical holes, threaded holes and fixing bolts form a fixed point. The threaded portion of the fixing bolt 108 passes through the through hole on the upper housing and the elliptical hole on the sealing strip and is screwed into the threaded hole on the lower housing, and the head of the fixing bolt 108 is pressed on the upper housing 102. In view of the overall rigidity requirements of the upper and lower shells 102, 104, as shown with reference to fig. 1, no fixing points are provided at the corners of the upper and lower shells 102, 106 and 104, which are convex or concave. In one embodiment, the fixing bolts 108 are M5 bolts, i.e., bolts with a pre-tightening torque of 5 Nm. The diameter of the via hole provided in the upper housing 102 is 7mm and the size of the oval hole provided in the sealing strip 106 is 12.5mm x 16mm, depending on the size of the M5 bolt. The adoption of the elliptical hole on the sealing strip 106 mainly considers the limit structure (such as a limit member 141 to be described later) on the lower housing and the deformation control requirement of the material of the sealing strip itself. The size of the threaded hole on the lower housing 104 matches the threaded portion of the M5 bolt. In one embodiment, the spacing between the fixation points is less than 60mm.
The sealing strip 106 is located between the assembled upper and lower shells 102 and 104, and in order to avoid excessive extrusion of the sealing strip 106 caused by too tight assembly of the upper and lower shells 102 and 104, a limiting member is provided on the upper or lower shell, and limits the space between the upper and lower shells after the upper and lower shells are assembled. Fig. 4 is a schematic view showing the structure of the upper stopper of the lower case in the sealing mechanism of the battery pack according to an embodiment of the present invention. In the embodiment shown in fig. 4, the stopper 141 is mounted on the lower housing 104. The stopper 141 is a cylinder having a height of 3mm and a diameter of 12mm. A 3mm cylindrical stop is used so that the minimum spacing between the upper housing 102 and the lower housing 104 is 3mm after assembly. In one embodiment, the position of the limiting member 141 is aligned with the threaded hole on the lower housing 104, or the limiting member 141 performs the function of a threaded hole on the lower housing at the same time, i.e., a threaded hole is formed in the center of the limiting member 141. The elliptical hole on the sealing strip 106 is matched with the limiting piece 141, and the elliptical hole is sleeved on the limiting piece 141.
The sealing strip must meet all sealing requirements in the development process in the theoretical state, the under-pressure state (0.5 mm) and the over-pressure state (0.5 mm). In order to meet the sealing requirement, the cross-section structure of the sealing strip forms a plurality of sealing surfaces. In addition, in the region where the fixing bolts are located, since it is unavoidable that external liquid penetrates into the sealing surface through the respective openings, the sealing strip of the present invention has a lip structure at a position corresponding to the fixing bolts to control the external liquid penetration to be controlled around the respective opening regions. Fig. 2 discloses a schematic cross-sectional view of a sealing strip in a sealing mechanism of a battery pack according to an embodiment of the present invention. Referring to fig. 2, the cross-sectional structure of the weather strip 106 includes: a central portion 161, an edge portion 162, an upper lip 163, and a lower lip 164. The central portion 161 has a first thickness. The first thickness matches the height of the stop 141 and the width of the central portion 161 matches the size of the fixing bolt (and thus the size of the oval hole in the sealing strip), the width of the central portion 161 being slightly greater than the width of the oval hole in the sealing strip. The edge portions 162 extend from the central portion 161 to both sides, and the width of the edge portion 162 of each side is 1/3 to 1/2 of the width of the central portion 161. The edge portion 162 has a second thickness that is 1/2 to 2/3 of the first thickness. At the top of the seal, at the interface of the central portion and the edge portion, an upwardly opening bowl-shaped upper lip 163 is formed. The upper lip 163 opens at an angle of 20 deg. to 30 deg., and the upper lip 163 extends upwardly a sufficient height to fully wrap around the location of the anchor bolt. The height of the upper lip 163 is required to meet the packing and sealing requirements for the fixing bolt in all of the theoretical, under-pressure and over-pressure conditions. At the top of the sealing strip, at the interface of the central portion and the edge portion, a downwardly projecting lower lip 164 is formed. In the illustrated embodiment, the lower lip 164 is a hemisphere having a diameter of 1/8 to 1/6 of the first thickness. In the embodiment using a stop member on the lower housing, the sealing strip is sleeved on the stop member as the fixing bolt is screwed into the stop member. The limiting piece and the lower shell are integrally formed, so that the sealing requirement on the bottom of the sealing strip is relatively low because the limiting piece and the lower shell are not needed to be sealed, and the lower lip 164 is realized by a hemispherical body with a small diameter. In the illustrated embodiment, the height from the bottom of the lower lip to the top of the upper lip is 2-3 times the first thickness. It should be noted that if the embodiment of the stopper on the upper housing is used, the stopper and the upper housing are integrally formed so that the sealing requirement of the top is low and the sealing requirement of the bottom is high. In this case the upper lip may be realized by a hemisphere, while the lower lip is bowl-shaped and extends downwards in a sufficient detail, it being understood that the sealing strip shown in fig. 2 is used upside down, but both are actually of the same cross-sectional structure. Fig. 3 is a schematic view showing the structure of the sealing strip and the lower case in the sealing mechanism of the battery pack according to an embodiment of the present invention. In the embodiment shown in fig. 3, it can be seen that when the sealing strip 106 is mounted to the lower housing 104, an oval aperture (not shown) in the sealing strip is placed over the stop 141 on the lower housing, and an upper lip 163 on the sealing strip is wrapped around the stop 141.
In the embodiment shown in fig. 2, the central portion 161, edge portion 162, upper lip 163 and lower lip 164 of the cross section of the seal strip each have the following specific dimensions:
the width of the central portion 161 is 12.6mm, corresponding to an elliptical aperture of 12.5mm width. The first thickness of the central portion 161 is 3.5mm, corresponding to a stop of 3mm height. The width of the edge portion 162 of each side is 7.7mm. The total width of the weather strip (the combination of the widths of the central portion and the edge portions on both sides) was 28mm. The second thickness of the edge portion 162 is 2mm. The upper lip 163 extends upwardly from two sections of the central portion 161 and is inclined outwardly, the top width of the upper lip 163 being 22.7mm. The lower lips 164 are located 7.5mm each from the midline at the bottom of the seal, the lower lips 164 being two hemispheres of 0.5mm radius, the two hemispheres being 15mm apart. The height from the bottom of the lower lip 164 to the top of the upper lip 163 is 7.4mm.
In terms of the material of the sealing strip 106, the sealing strip may be Ethylene Propylene Diene Monomer (EPDM), nitrile rubber (NBR), or silicone rubber. In view of the high requirements and reliability of the seal, in one embodiment the material used for the sealing strip is silicone rubber. The basic performance requirements are as follows:
hardness (Shore a): 60-65;
breaking strength: 8-8.2 MPa;
elongation at break: ca.250%;
operating temperature: -55 to 150oc;
permanent set at normal temperature: 90%;
ozone resistance test (15% tensile, 40oc,72 hours): no cracking.
In order to ensure the air tightness, the sealed rubber material adopts a compact rubber structure and does not contain air holes.
In practical applications, the sealing strip 106 is a closed loop structure with a length of approximately 6 meters due to the large size of the battery pack, and if a one-time molding process is used, the length of approximately 6 meters makes the mold development and processing costs very high. Therefore, the invention adopts the processes of segment splicing and secondary mould pressing when manufacturing the sealing strip. The sealing strip is formed by splicing a plurality of straight line segments and a plurality of corner segments. The straight line subsection is formed by compression molding of a straight line mould, the straight line subsection adopts an integral rubber mould compression molding mode, and an elliptical hole is directly formed in the mould so as to ensure the matching of the elliptical hole and the upper and lower shells. The molding of the straight segment is a one-time molding. The corner section is formed by compression molding of a corner mold, wherein when the corner mold is used for compression molding of the corner section, the corner section is connected with the formed linear section by compression molding. And for the corner section, adopting a corner mold for molding, and connecting the corner section with the molded linear section while molding the corner section. The molding of the corner segment is secondary molding, and the connection of the corner segment and the straight line segment is realized at the same time of the secondary molding. The size and the number of the die can be greatly reduced by the process, and the effect of reducing the cost is achieved.
The sealing mechanism of the battery pack adopts an assembled sealing scheme and is assembled through bolts. The cross-section structure of the sealing strip forms a plurality of sealing surfaces, and the sealing is carried out by the structure auxiliary material, so that the requirement on the property of the material is reduced. The sealing strip is manufactured in a sectional splicing mode, and the sealing strip is provided with a limiting mechanism.
The embodiments described above are intended to provide those skilled in the art with a full range of modifications and variations to the embodiments described above without departing from the inventive concept thereof, and therefore the scope of the invention is not limited by the embodiments described above, but is to be accorded the broadest scope consistent with the innovative features recited in the claims.
Claims (7)
1. A sealing mechanism for a battery pack, comprising:
the shape of the sealing strip is matched with the outline of the joint of the upper shell and the lower shell of the battery pack, and the sealing strip is assembled between the upper shell and the lower shell;
the fixing bolt penetrates through the upper shell, the sealing strip and the lower shell to fix the upper shell, the sealing strip and the lower shell together;
the sealing strip comprises a sealing strip, a fixing bolt and a sealing strip, wherein the cross section structure of the sealing strip forms a plurality of sealing surfaces, and the sealing strip is provided with a lip structure at a position corresponding to the fixing bolt;
wherein, the cross-sectional structure of sealing strip includes:
a central portion having a first thickness;
an edge portion extending from the central portion to both sides, having a second thickness;
forming an upwardly open bowl-shaped upper lip at the juncture of the top, central portion and edge portion of the seal strip;
forming a downwardly projecting lower lip at the juncture of the bottom, central portion and edge portion of the sealing strip;
wherein the opening angle of the upper lip edge is 20-30 degrees;
the lower lip is a hemisphere, and the diameter is 1/8-1/6 of the first thickness;
the height from the bottom of the lower lip to the top of the upper lip is 2-3 times the first thickness.
2. The sealing mechanism of a battery pack as recited in claim 1, wherein,
the upper shell is provided with a round via hole, the lower shell is provided with a threaded hole, the sealing strip is provided with an elliptical hole, the positions of the via hole, the elliptical hole and the threaded hole correspond to each other, and the corresponding via hole, elliptical hole, threaded hole and fixing bolt form a fixed point;
the screw thread part of the fixing bolt penetrates through the through hole on the upper shell and the elliptical hole on the sealing strip and is screwed into the threaded hole on the lower shell, and the head of the fixing bolt is tightly pressed on the upper shell.
3. The sealing mechanism of the battery pack according to claim 2, wherein no fixing points are provided at the corners of the upper case, the sealing strip and the lower case, which are convex or concave.
4. The sealing mechanism of a battery pack as recited in claim 1, wherein,
the width of the central part is matched with the size of the fixing bolt;
the width of the edge part of each side is 1/3-1/2 of the width of the central part;
the second thickness is 1/2-2/3 of the first thickness.
5. A battery pack, comprising:
an upper case and a lower case assembled with each other to form a case of the battery pack;
the shape of the sealing strip is matched with the outline of the joint of the upper shell and the lower shell of the battery pack, and the sealing strip is assembled between the upper shell and the lower shell;
the fixing bolt penetrates through the upper shell, the sealing strip and the lower shell to fix the upper shell, the sealing strip and the lower shell together;
the sealing strip comprises a sealing strip, a fixing bolt and a sealing strip, wherein the cross section structure of the sealing strip forms a plurality of sealing surfaces, and the sealing strip is provided with a lip structure at a position corresponding to the fixing bolt;
wherein, the cross-sectional structure of sealing strip includes:
a central portion having a first thickness matching a height of a stopper provided on the upper case or the lower case, a width of the central portion matching a size of the fixing bolt;
edge portions extending from the central portion to both sides, the width of the edge portion of each side being 1/3 to 1/2 of the width of the central portion, the edge portion having a second thickness, the second thickness being 1/2 to 2/3 of the first thickness;
a bowl-shaped upper lip edge which is opened upwards is formed at the junction of the central part and the edge part at the top of the sealing strip, and the opening angle of the upper lip edge is 20-30 degrees;
forming a downward protruding lower lip at the junction of the central part and the edge part at the bottom of the sealing strip, wherein the lower lip is a hemisphere, and the diameter is 1/8-1/6 of the first thickness;
the height from the bottom of the lower lip to the top of the upper lip is 2-3 times the first thickness.
6. The battery pack of claim 5, wherein the battery pack comprises a plurality of battery cells,
the upper shell is provided with a round via hole, the lower shell is provided with a threaded hole, the sealing strip is provided with an elliptical hole, the positions of the via hole, the elliptical hole and the threaded hole correspond to each other, and the corresponding via hole, elliptical hole, threaded hole and fixing bolt form a fixed point;
the thread part of the fixing bolt passes through the through hole on the upper shell and the elliptical hole on the sealing strip and is screwed into the threaded hole on the lower shell, and the head part of the fixing bolt is tightly pressed on the upper shell;
the limiting piece limits the interval between the upper shell and the lower shell after the upper shell and the lower shell are assembled;
no fixing points are arranged at the convex or concave corners of the upper shell, the sealing strip and the lower shell.
7. The battery pack of claim 6, wherein the sealing strip is formed by splicing a plurality of straight line segments and a plurality of corner segments, the straight line segments are molded by a straight line mold, the corner segments are molded by a corner mold, and wherein the corner mold is used for molding the corner segments, and the corner segments are connected with the molded straight line segments.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711429675.8A CN107946515B (en) | 2017-12-26 | 2017-12-26 | Battery pack and sealing mechanism thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711429675.8A CN107946515B (en) | 2017-12-26 | 2017-12-26 | Battery pack and sealing mechanism thereof |
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| Publication Number | Publication Date |
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| CN107946515A CN107946515A (en) | 2018-04-20 |
| CN107946515B true CN107946515B (en) | 2023-07-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109178632A (en) * | 2018-10-24 | 2019-01-11 | 南京德荣包装制品有限公司 | A kind of hardware tool moisture-proof plastic packing box and preparation method thereof |
| CN109573345A (en) * | 2018-11-06 | 2019-04-05 | 南京德荣包装制品有限公司 | Reinforce moisture-proof stamping parts plastic packing box |
| FR3122041B1 (en) | 2021-04-19 | 2023-12-29 | Renault Sas | Waterproof electric battery cover |
| CN113690532A (en) * | 2021-07-07 | 2021-11-23 | 浙江零跑科技股份有限公司 | Battery tray seal structure |
| CN115275474B (en) * | 2022-09-19 | 2023-01-24 | 蜂巢能源科技股份有限公司 | Battery box structure and battery package |
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