CN112848330A - Hot plate welding process for cover plate of lithium battery box - Google Patents
Hot plate welding process for cover plate of lithium battery box Download PDFInfo
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- CN112848330A CN112848330A CN202011598140.5A CN202011598140A CN112848330A CN 112848330 A CN112848330 A CN 112848330A CN 202011598140 A CN202011598140 A CN 202011598140A CN 112848330 A CN112848330 A CN 112848330A
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- welding
- hot plate
- inner shell
- outer shell
- plate welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
- B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention provides a hot plate welding process for a cover plate of a lithium battery box, and relates to the technical field of welding of battery box cover plates. The hot plate welding process for the cover plate of the lithium battery box comprises the following steps of: s1, preparing welding materials: the battery box upper cover consists of an inner shell and an outer shell, the inner shell and the outer shell are both obtained by injection molding of modified PP materials, an auxiliary structure required by welding is added on the basis of an original product, and the internal rib positions of the inner shell and the outer shell are increased by 1-2mm for hot melting during injection molding; s2, detecting materials before butt welding: 1) checking whether excessive glue sites influencing welding exist; 2) and checking whether the embedded workpiece needing to be embedded into the bin cover is installed in place. Compared with the original bonding process, the invention avoids the problems that the weight of the product is increased due to the fixation of screws and the product is rusted after a long time; compared with glue adhesion, the phenomenon that the glue is aged and falls off after a long time is improved.
Description
Technical Field
The invention relates to the technical field of battery box cover plate welding, in particular to a hot plate welding process for a cover plate of a lithium battery box.
Background
In daily life, among people's vehicles, the electric motor car is more and more popular, and the indispensable subassembly of electric motor car is rechargeable battery, therefore the battery case of fixed rechargeable battery is also indispensable, and rechargeable battery's service environment must be dry, so the performance of battery case needs to be stronger.
At present, the ectotheca of traditional battery case upper cover generally adopts the veneer connected mode to fix, can cooperate some screws to further fix simultaneously, but uses the screw fixation can increase product weight, can appear rusty problem after the time of having a specified duration simultaneously, and the phenomenon that drops is produced in the ageing of glue after can leading to product time for a long time to traditional glue adhesive's mode to just reduced the life of product, there is certain limitation.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a hot plate welding process for a cover plate of a lithium battery box, which solves the problems that the weight of a product is increased due to the use of screws for fixation, and rusting occurs after a long time, and the phenomenon that the glue is aged and falls off after the product is used for a long time due to the traditional glue bonding mode, so that the service life of the product is shortened.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a hot plate welding process for a cover plate of a battery case for a lithium battery, the process comprising the steps of:
s1, preparing welding materials: the battery box upper cover consists of an inner shell and an outer shell, the inner shell and the outer shell are both obtained by injection molding of modified PP materials, an auxiliary structure required by welding is added on the basis of an original product, and the internal rib positions of the inner shell and the outer shell are increased by 1-2mm for hot melting during injection molding;
s2, detecting materials before butt welding:
1) checking whether excessive glue sites influencing welding exist;
2) checking whether an embedded workpiece needing to be embedded into the bin cover is installed in place;
s3, respectively placing the inner shell and the outer shell into positioning jigs of an upper positioning plate and a lower positioning plate in a hot plate welding machine, placing the outer shell into the upper positioning jig, and placing the inner shell into the lower positioning jig;
s4, debugging the position of the inner shell and the outer shell in a hot plate welding machine, adjusting the position of the inner shell in the hot plate welding machine through a positioning and guiding mechanism in the hot plate welding machine according to the basic position of product assembly, simulating the opening and closing action of the hot plate welding to verify the position and the movement stroke of the inner shell, finally determining the final standard position, and fixing the upper and lower fixing jigs and the middle heating plate;
s5, starting a hot plate welding machine, operating the upper and lower positioning plates to move to the middle heating plate to be closed to melt ribs after the temperature of the heating plate reaches a set temperature, wherein the rib melting time is 3S, separating the upper and lower positioning plates after the time is up, retreating the heating plate, closing the upper and lower positioning plates again, and completing welding after 6S;
and S6, after welding, opening the upper and lower positioning plates again, and taking out the welded finished product.
Preferably, the fixing mode of the inner shell and the outer shell in the step 3 is that the inner shell and the outer shell are fixed through a cylinder sucker in a hot plate welding machine in an adsorption mode.
Preferably, the temperature of the heating plate in the step 5 is set to 300 +/-10 ℃.
(III) advantageous effects
The invention provides a hot plate welding process for a cover plate of a lithium battery box. The method has the following beneficial effects:
1. compared with the original bonding process, the invention avoids the problems that the weight of the product is increased due to the fixation of screws and the product is rusted after a long time; compared with glue adhesion, the phenomenon that the glue is aged and falls off after a long time is improved.
2. According to the invention, through a hot plate welding process, a tension test between two shells after welding can reach more than 1000N, on the premise of meeting the structure and appearance of a product, the effect of sealing and waterproofing can be achieved, the production automation is facilitated, the production efficiency is improved, and the production cost is reduced.
Drawings
FIG. 1 is a schematic structural diagram of a battery case upper cover shell according to the present invention;
FIG. 2 is a schematic view of the inner case structure of the upper cover of the battery case according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b):
as shown in fig. 1-2, an embodiment of the present invention provides a hot plate welding process for a cap plate of a battery case for a lithium battery, the process comprising the steps of:
s1, preparing welding materials: the battery box upper cover consists of an inner shell and an outer shell, the inner shell and the outer shell are both obtained by injection molding of modified PP materials, an auxiliary structure required by welding is added on the basis of an original product, all rib positions in the inner shell and the outer shell have the original functions of only supporting the product and increasing the strength of the integral battery box upper cover, but after the battery box upper cover is applied to a hot plate welding process, the rib positions in the inner shell become the welding positions of the inner shell and the outer shell, and the rib positions in the inner shell and the outer shell are increased by 1-2mm for hot melting during injection molding;
s2, detecting materials before butt welding:
1) checking whether excessive glue sites influencing welding exist;
2) whether an embedded workpiece needing to be embedded into the bin cover is installed in place is checked, and because of the requirement of the overall function, a magnet and a limiting clamping groove are embedded into the inner shell before the battery box is welded;
s3, respectively arranging the inner shell and the outer shell into positioning jigs of an upper positioning plate and a lower positioning plate in a hot plate welding machine, arranging the outer shell into the upper positioning jig, arranging the inner shell into the lower positioning jig, and fixing the inner shell and the outer shell in a way of adsorption and fixation through a cylinder sucker in the hot plate welding machine;
s4, debugging the position of the inner shell and the outer shell in a hot plate welding machine, adjusting the position of the inner shell in the hot plate welding machine through a positioning and guiding mechanism in the hot plate welding machine according to the basic position of product assembly, simulating the opening and closing action of the hot plate welding to verify the position and the movement stroke of the inner shell, finally determining the final standard position, and fixing the upper and lower fixing jigs and the middle heating plate;
s5, starting a hot plate welding machine, setting the temperature of the middle heating plate to be 300 +/-10 ℃, operating the upper and lower positioning plates to move to the middle heating plate to be closed to melt ribs after the temperature of the heating plate reaches the set temperature, wherein the rib melting time is 3S, separating the upper and lower positioning plates after the time is up, retreating the heating plate, closing the upper and lower positioning plates again, and completing welding after 6S;
and S6, after welding, opening the upper and lower positioning plates again, and taking out the welded finished product.
Compared with the original bonding process, the invention avoids the problems that the weight of the product is increased due to the fixation of screws and the product is rusted after a long time; compared with glue adhesion, the phenomenon that the glue is aged and falls off after a long time is improved; through hot plate welding process, tensile test between two shells can reach more than 1000N after the welding, satisfies under the prerequisite of product structure and outward appearance, can reach sealed waterproof effect again, and is favorable to production automation, improves production efficiency, reduction in production cost.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a reference structure" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. The utility model provides a hot plate welding process for apron of lithium cell battery case which characterized in that: the process comprises the following steps:
s1, preparing welding materials: the battery box upper cover consists of an inner shell and an outer shell, the inner shell and the outer shell are both obtained by injection molding of modified PP materials, an auxiliary structure required by welding is added on the basis of an original product, and the internal rib positions of the inner shell and the outer shell are increased by 1-2mm for hot melting during injection molding;
s2, detecting materials before butt welding:
1) checking whether excessive glue sites influencing welding exist;
2) checking whether an embedded workpiece needing to be embedded into the bin cover is installed in place;
s3, respectively placing the inner shell and the outer shell into positioning jigs of an upper positioning plate and a lower positioning plate in a hot plate welding machine, placing the outer shell into the upper positioning jig, and placing the inner shell into the lower positioning jig;
s4, debugging the position of the inner shell and the outer shell in a hot plate welding machine, adjusting the position of the inner shell in the hot plate welding machine through a positioning and guiding mechanism in the hot plate welding machine according to the basic position of product assembly, simulating the opening and closing action of the hot plate welding to verify the position and the movement stroke of the inner shell, finally determining the final standard position, and fixing the upper and lower fixing jigs and the middle heating plate;
s5, starting a hot plate welding machine, operating the upper and lower positioning plates to move to the middle heating plate to be closed to melt ribs after the temperature of the heating plate reaches a set temperature, wherein the rib melting time is 3S, separating the upper and lower positioning plates after the time is up, retreating the heating plate, closing the upper and lower positioning plates again, and completing welding after 6S;
and S6, after welding, opening the upper and lower positioning plates again, and taking out the welded finished product.
2. The hot plate welding process of a cap plate for a battery case of a lithium battery as claimed in claim 1, wherein: and in the step 3, the inner shell and the outer shell are fixed in a fixing mode through a cylinder sucker in a hot plate welding machine in an adsorption mode.
3. The hot plate welding process of a cap plate for a battery case of a lithium battery as claimed in claim 1, wherein: the heating plate temperature in step 5 is set to 300 + -10 deg.C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011598140.5A CN112848330A (en) | 2020-12-30 | 2020-12-30 | Hot plate welding process for cover plate of lithium battery box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011598140.5A CN112848330A (en) | 2020-12-30 | 2020-12-30 | Hot plate welding process for cover plate of lithium battery box |
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| CN112848330A true CN112848330A (en) | 2021-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011598140.5A Pending CN112848330A (en) | 2020-12-30 | 2020-12-30 | Hot plate welding process for cover plate of lithium battery box |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2897842Y (en) * | 2006-04-19 | 2007-05-09 | 苏州良才科技有限公司 | Plastic unit-connected turnover box |
| CN201371581Y (en) * | 2009-03-11 | 2009-12-30 | 深圳市科信超声焊接设备有限公司 | Highlight material flat-plate television casing welding machine |
| CN107672188A (en) * | 2016-08-01 | 2018-02-09 | 合肥国荣科技洗涤设备有限公司 | A kind of welding procedure of washing machine transmission case |
| CN207549516U (en) * | 2017-10-12 | 2018-06-29 | 无锡市鹏得塑料制品有限公司 | A kind of sweat soldering mold of detergent box |
-
2020
- 2020-12-30 CN CN202011598140.5A patent/CN112848330A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2897842Y (en) * | 2006-04-19 | 2007-05-09 | 苏州良才科技有限公司 | Plastic unit-connected turnover box |
| CN201371581Y (en) * | 2009-03-11 | 2009-12-30 | 深圳市科信超声焊接设备有限公司 | Highlight material flat-plate television casing welding machine |
| CN107672188A (en) * | 2016-08-01 | 2018-02-09 | 合肥国荣科技洗涤设备有限公司 | A kind of welding procedure of washing machine transmission case |
| CN207549516U (en) * | 2017-10-12 | 2018-06-29 | 无锡市鹏得塑料制品有限公司 | A kind of sweat soldering mold of detergent box |
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Application publication date: 20210528 |