CN115084752B - Battery module light blocking structure and battery module - Google Patents
Battery module light blocking structure and battery module Download PDFInfo
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- CN115084752B CN115084752B CN202210566003.6A CN202210566003A CN115084752B CN 115084752 B CN115084752 B CN 115084752B CN 202210566003 A CN202210566003 A CN 202210566003A CN 115084752 B CN115084752 B CN 115084752B
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- light blocking
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- plate
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- 230000000903 blocking effect Effects 0.000 title claims abstract description 195
- 238000003466 welding Methods 0.000 claims abstract description 147
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 239000002390 adhesive tape Substances 0.000 claims description 25
- 239000000853 adhesive Substances 0.000 claims description 9
- 230000001070 adhesive effect Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 abstract description 8
- 201000009310 astigmatism Diseases 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 230000005489 elastic deformation Effects 0.000 description 4
- 230000013011 mating Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
Classifications
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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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- 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
- H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
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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
- H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
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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
Abstract
The invention discloses a battery module light blocking structure and a battery module, wherein the battery module light blocking structure comprises a module shell, a multistage light blocking component and a guiding limiting structure, the module shell is provided with a containing cavity for placing a power supply core, the module shell further comprises a fixed middle plate and a fixed end plate, the fixed end plate transversely extends to form one wall surface of the containing cavity, a longitudinally extending mounting hole is formed in the fixed end plate in a penetrating mode, the middle part of the fixed middle plate is positioned in the containing cavity, the fixed middle plate is provided with a welding end, the welding end is inserted and fixed in the mounting hole, a welding gap which extends vertically is formed between one side of the welding end and the inner wall of the mounting hole, the multistage light blocking component comprises a first light blocking part and a second light blocking part, the first light blocking part and the second light blocking part can both play a role of shielding the welding gap, therefore, the bonding effect of the middle plate and the end plate is guaranteed through the guiding limiting structure, and the comprehensive light blocking effect of the periphery is finally realized.
Description
Technical Field
The invention relates to the technical field of power battery packs, in particular to a battery module light blocking structure and a battery module.
Background
The double-row large module in the power battery pack is designed with a welding structure of a middle plate and an end plate, and the problem of poor insulation and voltage resistance caused by light leakage burning through a battery cell insulating film exists during laser welding. The common module medium plate and end plate welding light blocking structure is that a light blocking strip is attached to the medium plate or a rubber sleeve is sleeved on the medium plate, and meanwhile, the welding position of the medium plate and the end plate is pressed through a welding tool, so that a welding gap is as small as possible, the light leakage quantity is reduced, and meanwhile, the quality of a welding line is ensured.
Disclosure of Invention
The invention mainly aims to provide a light blocking structure of a battery module and the battery module, and aims to solve the problem that a battery cell insulating film is burnt through due to the fact that the current laser welding easily passes through the light blocking structure and strikes a battery cell.
In order to achieve the above object, the present invention provides a light blocking structure of a battery module, including:
the module shell is provided with a containing cavity for placing the power supply core, the module shell further comprises a fixed middle plate and a fixed end plate, the fixed end plate extends transversely to form one wall surface of the containing cavity, a longitudinally extending mounting hole is formed in the fixed end plate in a penetrating mode, the middle of the fixed middle plate is located in the containing cavity, the fixed middle plate is provided with a welding end, the welding end is used for being inserted and fixed in the mounting hole, and a welding gap extending vertically is formed between one side of the welding end and the inner wall of the mounting hole; the method comprises the steps of,
the multistage light blocking assembly comprises a first light blocking part and a second light blocking part, wherein the first light blocking part is arranged on one side of the welding end, which forms the welding gap, and the second light blocking part is arranged on one side of the first light blocking part, which is away from the fixed end plate, and is used for blocking laser together with the first light blocking part in a matched mode.
Optionally, a light blocking adhesive tape extending up and down is arranged on one side of the welding end forming the welding gap;
the first light blocking part comprises the light blocking adhesive tape.
Optionally, the length of the light blocking adhesive tape is L1, and the length of the welding gap along the up-down direction is L2, wherein L1 is more than or equal to L2.
Optionally, an adhesive is coated on the corresponding side of the welding end to form the light blocking adhesive tape after the adhesive is dried.
Optionally, the light blocking structure of the battery module further comprises an insulating sheet arranged in the accommodating cavity, the insulating sheet is made of flexible materials, and the insulating sheet comprises:
the movable piece is arranged corresponding to the mounting hole and is provided with a first end and a second end which are arranged oppositely along the transverse direction; the method comprises the steps of,
the matching piece is arranged on the periphery of the movable piece in a surrounding mode, and the side face, away from the fixed end plate, of the matching piece is used for covering the outer side of the battery cell;
the first end and the matching piece are connected into a whole, and the second end can be bent towards the direction of the fixed end plate after being stressed and is contacted with one side of the welding end forming the welding gap;
the second light blocking portion includes the movable piece.
Optionally, the light blocking structure of the battery module further comprises an insulating sheet arranged in the accommodating cavity, wherein the side surface of the insulating sheet, which is away from the fixed end plate, is used for covering the outer side of the battery cell, and the insulating sheet is provided with a through hole corresponding to the mounting hole for the welding end to pass through;
the second light blocking part comprises a light blocking sheet, the light blocking sheet is made of flexible materials, one end of the light blocking sheet in the transverse direction is fixed on the insulating sheet, and the other end of the light blocking sheet is bent to be in contact with one side of the welding end, where the welding gap is formed.
Optionally, the upper side surface and the lower side surface of the welding end are arranged in a step manner so as to form two step surfaces arranged towards the fixed end plate;
the inner cavity of the mounting hole is provided with two abutting surfaces corresponding to the two step surfaces so as to be in tight fit with the two step surfaces.
Optionally, the aperture of the mounting hole facing to one end of the fixed middle plate is larger than the height of the welding end and the first light blocking part after connection.
Optionally, an upper wall surface and a lower wall surface of one end of the mounting hole, which is away from the fixed middle plate, respectively form a first limit surface and a second limit surface, and the first limit surface and the second limit surface are respectively contacted with the upper side surface and the lower side surface of the welding end;
the upper end face of the fixed end plate is provided with a groove which is communicated with the mounting hole, the upper end and the lower end of the groove are all communicated, a side wall of the groove is convexly provided with a guide protrusion which is used for contacting with the side face of the welding end, which is away from the welding gap, a side wall of the groove, which is opposite to the guide protrusion, is provided with a guide inclined surface which extends transversely and inclines towards the fixed middle plate, and one end of the guide inclined surface in the transverse and longitudinal directions extends to the welding gap;
the guide limiting structure comprises the guide protrusion, the guide inclined plane, the first limiting surface and the second limiting surface.
The invention also provides a battery module, which comprises the battery module light blocking structure, wherein the battery module light blocking structure comprises:
the module shell is provided with a containing cavity for placing the power supply core, the module shell further comprises a fixed middle plate and a fixed end plate, the fixed end plate extends transversely to form one wall surface of the containing cavity, a longitudinally extending mounting hole is formed in the fixed end plate in a penetrating mode, the middle of the fixed middle plate is located in the containing cavity, the fixed middle plate is provided with a welding end, the welding end is used for being inserted and fixed in the mounting hole, and a welding gap extending vertically is formed between one side of the welding end and the inner wall of the mounting hole; the method comprises the steps of,
the multistage light blocking assembly comprises a first light blocking part and a second light blocking part, wherein the first light blocking part is arranged on one side of the welding end, which forms the welding gap, and the second light blocking part is arranged on one side of the first light blocking part, which is away from the fixed end plate, and is used for blocking laser together with the first light blocking part in a matched mode.
According to the technical scheme, laser acts on the welding gap, so that the welding end and the fixed end plate are welded into a whole, the fixed end plate and the fixed middle plate extend along the transverse direction and the longitudinal direction respectively, during laser welding, the first light blocking part and the second light blocking part can play a role in shielding the welding gap, so that the effect of secondary blocking is achieved during laser injection, the first light blocking part can block the laser first, the second light blocking part can play a secondary blocking role of light leakage, the whole battery module has a better light blocking effect, the guide limiting structure plays a role in installation guide and position limiting, and the situation that the light leakage is increased due to the fact that the fixed middle plate and the fixed end plate are not tightly attached is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic perspective exploded view of an embodiment of a light blocking structure of a battery module according to the present invention;
fig. 2 is a schematic perspective view of an embodiment of a light blocking structure of the battery module of fig. 1;
FIG. 3 is an enlarged partial schematic view of the stationary end plate of FIG. 1;
FIG. 4 is a schematic perspective view of the fixed middle plate and the light blocking adhesive tape in FIG. 1;
FIG. 5 is a schematic perspective view of the insulating sheet of FIG. 1;
FIG. 6 is a schematic perspective view of the fixed middle plate and the insulating sheet in FIG. 1;
fig. 7 is a schematic perspective view of the fixed middle plate and the insulating sheet in fig. 1 (at another angle).
Reference numerals illustrate:
| reference numerals | Name of the name | Reference numerals | Name of the name |
| 100 | Light blocking structure of battery module | 22 | Second light blocking part |
| 11 | Fixed middle plate | 3 | Insulating sheet |
| 11a | Welding end | 31 | Movable plate |
| 111 | Step surface | 32 | Matching sheet |
| 12 | Fixed end plate | 4 | Light blocking vertical edge |
| 121 | Mounting hole | 51 | First limitFlour with a plurality of grooves |
| 122 | Groove | 52 | Second limiting surface |
| 1221 | Guide projection | 53 | Guiding inclined plane |
| 21 | A first light blocking part | a | Welding seam |
| 211 | Light blocking adhesive tape |
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the case where a directional instruction is involved in the embodiment of the present invention, the directional instruction is merely used to explain the relative positional relationship, movement condition, etc. between the components in a specific posture, and if the specific posture is changed, the directional instruction is changed accordingly.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The double-row large module in the power battery pack is designed with a welding structure of a middle plate and an end plate, and the problem of poor insulation and voltage resistance caused by light leakage burning through a battery cell insulating film exists during laser welding. The common module medium plate and end plate welding light blocking structure is that a light blocking strip is attached to the medium plate or a rubber sleeve is sleeved on the medium plate, and meanwhile, the welding position of the medium plate and the end plate is pressed through a welding tool, so that a welding gap is as small as possible, the light leakage quantity is reduced, and meanwhile, the quality of a welding line is ensured.
In view of the above, the present invention provides a light blocking structure of a battery module and a battery module, and fig. 1 to 7 are embodiments of the light blocking structure of a battery module.
Referring to fig. 1 to 4, the battery module light blocking structure 100 includes a module housing and a multi-stage light blocking assembly, the module housing has a receiving cavity for receiving a power supply, the module housing further includes a fixing middle plate 11 and a fixing end plate 12, the fixing end plate 12 extends in a lateral direction to form one wall surface of the receiving cavity, a mounting hole 121 extending in a longitudinal direction is formed in the fixing end plate 12, a middle portion of the fixing middle plate 11 is disposed in the receiving cavity, the fixing middle plate 11 has a welding end 11a, the welding end 11a is configured to be inserted and fixed in the mounting hole 121, a welding gap a extending in an up-down direction is formed between one side of the welding end 11a and an inner wall of the mounting hole 121, the multi-stage light blocking assembly includes a first light blocking portion 21 and a second light blocking portion 22, the first light blocking portion 21 is disposed on a side of the welding gap a formed by the first light blocking portion 21, and the second light blocking portion 22 is disposed on a side of the first portion 21 facing away from the fixing end plate 12, for co-blocking with the first light blocking portion 21.
In the technical scheme of the invention, laser acts on the welding gap a, so that the welding end 11a and the fixed end plate 12 are welded into a whole, the fixed end plate 12 and the fixed middle plate 11 respectively extend along the transverse direction and the longitudinal direction, during laser welding, the first light blocking part 21 and the second light blocking part 22 can both play a role of shielding the welding gap a, so that a secondary blocking effect is achieved during laser injection, the first light blocking part 21 blocks the laser first, the second light blocking part 22 can play a secondary blocking effect of light leakage, so that the whole battery module has a better light blocking effect, the guide limiting structure plays roles of installation guide and position limiting, and the situation that the light leakage is increased due to the fact that the fixed middle plate 11 is not tightly attached to the fixed end plate 12 is avoided.
Specifically, the present invention is not limited to the specific structure of the first light blocking portion 21 and the second light blocking portion 22, and in order to achieve the light blocking effect, in an embodiment, referring to fig. 4, a light blocking adhesive tape 211 extending vertically is disposed on a side of the welding end 11a where the welding gap a is formed, and the first light blocking portion 21 includes the light blocking adhesive tape 211. In this embodiment, when the laser beam enters the welding gap a, the light is blocked by the light blocking adhesive tape 211 first, so as to achieve the first light blocking effect. Specifically, the light blocking adhesive tape 211 may be adhered to the welding end 11a by adhesion, or may be fastened by providing a corresponding fastening groove on the welding end 11 a.
In this embodiment, an adhesive with a certain thickness is coated on the side corresponding to the welding end 11a to form the light-blocking adhesive tape 211 after drying. The adhesive can be structural adhesive, anaerobic adhesive and the like, is coated on the fixed middle plate 11 in advance, can be integrated with the fixed middle plate 11 after being dried, has a light blocking effect, can be well attached to the surface of the fixed middle plate 11, has no gap, is stable in connection effect, cannot float, is not influenced by deformation of the fixed middle plate 11 and flatness of the surface, and can reduce the processing requirement on the welding end 11 a.
In other embodiments, the first light blocking portion 21 may be provided by an interference fastening manner of a rubber sleeve, but considering that the fixed middle plate 11 has deformation and poor flatness processing, the local adhesion of the rubber sleeve may be not tight, and there is a risk of light leakage, so that the requirement on the flatness of the welding end 11a is high.
In order to ensure the light blocking effect of the light blocking adhesive tape 211, the length of the light blocking adhesive tape 211 is L1, and the length of the welding gap a along the up-down direction is L2, wherein L1 is more than or equal to L2. That is, the length of the light blocking adhesive tape 211 should be at least consistent with the length of the welding gap a, but considering the problems of light leakage due to astigmatism and laser incidence angle deviation during welding, it is preferable that the length of the light blocking adhesive tape 211 is consistent with the height of the fixing middle plate 11 in the up-down direction, and it is understood that the size of the light blocking adhesive tape 211 should be set to be capable of completely shielding the welding gap a, so that when the light blocking adhesive tape 211 is a circular arc interface, there is a certain requirement on the outer diameter thereof, and when in actual use, budget needs to be performed according to the size actually reached by the welding gap a, and then adhesive coating with corresponding thickness is performed.
In the actual use process, the first light blocking portion 21 is inserted into the mounting hole 121 along with the welding end 11a, and considering that the inner cavities of the mounting hole 121 of the fixing middle plate 11 and the fixing end plate 12 belong to clearance fit, the inner cavity of the mounting hole 121 is larger than the size of the welding end 11a, so that the assembly feasibility is provided, and therefore, the second light blocking portion 22 is arranged outside the mounting hole 121, can be directly arranged at the welding end 11a, or can be arranged in the module housing.
In order to achieve the further shielding effect of the second light blocking portion 22, in an embodiment, referring to fig. 5 to 6, the light blocking structure 100 of a battery module further includes an insulating sheet 3 disposed in the accommodating cavity, the insulating sheet 3 is made of a flexible material, the insulating sheet 3 includes a movable sheet 31 and a mating sheet 32, the movable sheet 31 is disposed corresponding to the mounting hole 121, the movable sheet 31 has a first end and a second end which are disposed opposite to each other in a transverse direction, the mating sheet 32 is disposed around the periphery of the movable sheet 31, a side surface of the mating sheet 32 facing away from the fixed end plate 12 is used for covering the outside of the battery cell, wherein the first end and the mating sheet 32 are integrally connected, the second end can be bent in a direction of the fixed end plate 12 after being stressed, and contacts with one side of the welding end 11a to form the welding gap a, and the second light blocking portion 22 includes the movable sheet 31. It can be understood that the movable sheet 31 and the matching sheet 32 are formed together to form the insulating sheet 3, and during actual processing, the insulating sheet 3 is obtained as a whole, the corresponding portion of the insulating sheet 3 is cut, and a U-shaped incision is carved, so that the incision is thin and narrow, the fitting force is large after the movable sheet and the fixed middle sheet 11 are assembled, and the incision is set into a U-shape, so that interference with the light blocking adhesive tape 22 during the assembly process can be avoided.
Therefore, the fitting sheet 32 playing a role in fitting and the movable sheet 31 capable of being deformed by external force and changing relative to the position of the fitting sheet 32 are obtained, the material of the insulating sheet 3 is generally a plastic sheet, the thickness is 0.5mm, the insulating sheet 3 has better elastic deformation capability, before the insulating sheet 3 is assembled with the fixed middle plate 11, the movable sheet 31 is in a natural state and is flush with the fitting sheet 32, only a narrower incision can be seen at the position corresponding to the assembly position of the fixed middle plate 11, during assembly, the welding end 11a supports the movable sheet 31 to deform and bend along with the change of the relative position of the insulating sheet 3 and the fixed middle plate 11, and the second end of the movable sheet 31 is tightly adhered to the surface corresponding to the welding end 11a due to the action of the deformation force, so that an arc-shaped structure is formed after the assembly is completed, the insulating sheet has a larger shielding range and plays a better role in blocking light. The second end can be abutted against or spaced from the first light blocking portion 21, and the positions of the movable sheet 31 and the light blocking adhesive tape 211 are related to the actual design size of the movable sheet 31 and the setting position of the light blocking adhesive tape 211.
In other embodiments, the light blocking structure 100 of the battery module further includes an insulating sheet 3 disposed in the accommodating cavity, the insulating sheet 3 is away from the side surface of the fixed end plate 12 and is used for covering the outer side of the electric core, the insulating sheet 3 is provided with a via hole corresponding to the mounting hole 121, so that the welding end 11a passes through the insulating sheet 3, at this time, the insulating sheet 3 is separately disposed, a via hole for the fixed middle plate 11 to pass through needs to be cut out, the second light blocking portion 22 includes a light blocking sheet, the light blocking sheet is made of a flexible material, one end of the light blocking sheet along the transverse direction is fixed to the insulating sheet 3, the other end of the light blocking sheet is bent to form one side contact of the welding gap a with the welding end 11a, at this time, the light blocking sheet is a part processed separately, the material can be different from the insulating sheet 3, the light blocking sheet is mounted in a pasting manner, the light blocking sheet can be attached before the fixed 11 is assembled, the light blocking sheet is set horizontally, the light blocking sheet can be deformed, at least, the position of the light blocking sheet can be deformed at least, the position of the light blocking sheet is deformed at the same time, and the opposite to the middle plate 11 is deformed, and the light blocking sheet has a shape corresponding to the welding position, and the two ends are deformed relatively, and the light blocking sheet 11 is deformed, and the light blocking sheet is deformed. The light blocking sheet can be attached after the fixed middle plate 11 is assembled, at this time, the positions of the fixed middle plate 11 and the insulating sheet 3 are fixed, and the deformation of the light blocking sheet needs to be controlled by an operator during installation.
Further, the upper side and the lower side of the welding end 11a are respectively stepped to form two stepped surfaces 111 facing the fixed end plate 12, and the inner cavity of the mounting hole 121 is provided with two abutment surfaces corresponding to the two stepped surfaces 111 to be in tight fit with the two stepped surfaces 111. The inner cavity of the mounting hole 121 is not in a regular column shape, after assembly, the two step surfaces 111 are abutted against the two abutting surfaces, the part of the welding end 11a protruding out of the step surface 111 is inserted into the rest hole section of the mounting hole 121, and the step of the welding end 11a plays a limiting role during assembly, and meanwhile, the effect of blocking light can be achieved.
The welding process requires that the smaller the gap between the welding position of the fixed middle plate 11 and the fixed end plate 12 is, the better the gap is, therefore, it is common practice to press the fixed middle plate 11 at the welding position by using a tool before welding, so that the fixed middle plate 11 and the fixed end plate 12 are tightly attached to each other, and thus, it is ensured that a higher welding quality is obtained, specifically, the aperture of one end of the mounting hole 121 facing the fixed middle plate 11 is larger than the aperture of the other end of the mounting hole 121. Thereby facilitating the loading of the welding end 11a with the first light blocking portion 21, and at the same time, the size of the welding gap a can be adjusted to be minimum, thereby meeting the requirements of the welding process.
And, the aperture of the mounting hole 12 toward the end of the fixed middle plate 11 is larger than the height of the welded end 11a and the first light blocking portion 21 after being connected. Therefore, the width of the inner cavity of the mounting hole 121 is larger than the size of the fixed middle plate 11 after being glued, which is beneficial to assembly, and meanwhile, the problem that the glue overflows to cause unable assembly can be prevented.
Furthermore, referring to fig. 3 again, the upper wall surface and the lower wall surface of the end of the mounting hole 121 facing away from the fixed middle plate 11 form a first limiting surface 51 and a second limiting surface 52 respectively, the first limiting surface 51 and the second limiting surface 52 are respectively in contact with the upper side surface and the lower side surface of the welding end 11a, so that the fixed middle plate 11 can be limited at the upper end and the lower end, a groove 122 is formed in the upper end surface of the fixed end plate 12, the groove 122 is communicated with the mounting hole 121, the upper end and the lower end of the groove 122 are all penetrated, a guide protrusion 1221 extending along the upper direction and the lower direction is convexly formed on one side wall of the groove 122, the guide protrusion 1221 is used for contacting with the side surface of the welding end 11a facing away from the welding gap a, a guide inclined surface 53 extending along the transverse direction and tilting towards the fixed middle plate 11 is formed on the side wall of the groove 122 opposite to the guide protrusion 1221, one end of the guide inclined surface 53 extending along the transverse direction to the welding gap a, and the guide protrusion 122 comprises the guide protrusion 1221 and the guide protrusion 1221 facing towards the first end surface and the fixed middle plate 11. The guiding protrusions 1221 cooperate with the inner cavity of the mounting hole 121 to play a role in guiding the insertion of the fixed middle plate 11, and simultaneously, an external force is provided for the fixed middle plate 11 to enable the fixed middle plate 11 to be automatically attached after being assembled, so that the welding end 11a can be close to one side of the welding gap a, the welding gap a is smaller, welding quality is guaranteed, meanwhile, the guiding protrusions 1221 can also serve as light blocking parts, during welding, astigmatism of laser on one side deviating from the welding gap a is blocked, the guiding inclined plane 53 extends to the position of the welding gap a, so that the fixed middle plate 11 can be conveniently inserted and guided, and the space of the inner cavity of the mounting hole 121 is guaranteed to be enough to accommodate, and the end face of the fixed end plate 12, which faces the fixed middle plate 11, can enable the second light blocking part 22 to resist and even flatten, so that the attaching force of the fixed middle plate 11 and the second light blocking part 22 is larger. The problems that the laser quantity leaked to the first light blocking part 21 and the second light blocking part 22 is increased and the quality of welding seams is difficult to guarantee due to the fact that the fixing middle plate 11 is not tightly attached to the fixing end plate 12 are solved. The guiding and limiting structure has the function of blocking lateral astigmatism and is matched with the multi-stage light blocking assembly to jointly block light.
When the second light blocking portion 22 is the movable plate 31, it is preferable that the fixed end plate 12 flattens the movable plate 31 toward the end surface of the fixed middle plate 11 after assembly, and the guide protrusions 1221 are provided so that the fixed middle plate 11 is not pressed by a pressing device alone during assembly. The position of the guide projection 1221 needs to be reasonably designed at the time of setting, and if it is designed to be far from the welding gap a, the effect of pressing is reduced; if it is designed on the right opposite side of the welding gap a, the fixing middle plate 11 loses the space of local deformation, and the final assembly is difficult, so the position of the design in the drawing is optimal, the guiding protrusion 1221 spans two adjacent wall surfaces of the groove 122 at the same time and is located on one side far from the welding gap a, and a certain interval exists between the guiding protrusion 1221 and the part of the welding end 11a exposed from the mounting hole 121 after assembly.
It is to be understood that the guide protrusions 1221 are respectively located on opposite sides of the welding end 11a from the first light blocking portion 21, and the two step surfaces 111 are located on upper and lower sides of the welding end 11a, thereby playing a combined light blocking effect in the circumferential direction.
In addition, referring to fig. 7, after the movable plate 31 is lifted, an opening is exposed on the matching plate, and after the fixed middle plate 11 is installed, a side edge of the opening opposite to the first end extending along a longitudinal direction and a part of the matching plate at the periphery of the opening form a light blocking vertical edge 4 together, and the light blocking vertical edge 4 can be tightly attached to the fixed middle plate 11 due to the elastic deformation force of the movable plate 31, when the guiding protrusion 1221 on the fixed end plate 12 cannot completely block the astigmatism, the light blocking vertical edge 4 can play a role of blocking the light, so as to improve the effectiveness of blocking the astigmatism.
Similarly, in the embodiment in which the via hole is provided on the insulating sheet 3 and the light blocking sheet is adhered separately, a side edge extending in the longitudinal direction, opposite to the adhering end of the light blocking sheet, of the via hole and a part of the insulating sheet at the periphery of the via hole may also form a light blocking vertical edge 4, and the light blocking vertical edge 4 may also be adhered to the fixed middle plate 11 due to the elastic deformation force of the light blocking sheet, so as to play a role in light blocking.
In this embodiment, the light blocking adhesive tape 211 obtained by coating the adhesive on the fixed middle plate 11 is a main light blocking structure, so as to replace a light blocking strip or a rubber sleeve in the prior art, the movable sheet 31 is obtained by locally cutting the insulating sheet 3, and the light blocking adhesive tape is used as a secondary light blocking structure, and can be tightly attached to the fixed end plate 12 by the action of elastic deformation force of plastic, and the inner cavity local adjustment guide protrusion 1221 of the mounting hole 121 of the fixed end plate 12 and the two strip sections 111 respectively form a light blocking structure and a guide limiting structure, so that the welding position of the fixed middle plate 11 and the fixed end plate 12 can be tightly attached to the welding seam position without the help of the compaction action of an external tool, the light leakage quantity is reduced, and the welding seam quality is ensured. The invention optimizes the structure based on the existing parts, has the double light blocking function of the whole structure, and the guide protrusions 1221 enable the welding positions of the fixed middle plate 11 and the fixed end plate 12 to be automatically attached after assembly, so that the light blocking efficiency is greatly improved.
It should be noted that, the module housing includes two fixed end plates 12, which are separately disposed on two sides of the fixed middle plate 11 along the longitudinal direction, and correspondingly, the fixed middle plate 11 has two welding ends 11a that are disposed opposite to each other, the insulating sheet 3 is correspondingly disposed two, the multistage light blocking component is correspondingly disposed two, and it should be noted that, two welding gaps a that are correspondingly formed are separately disposed on two sides of the welding ends 11a that are away from each other, that is, two protruding directions of the light blocking adhesive tapes 211 are disposed opposite to each other.
The invention also provides a battery module, which comprises the battery module light blocking structure 100, and the battery module comprises all the technical characteristics of the battery module light blocking structure 100, so that the battery module has the technical effects brought by all the technical characteristics, and the technical effects are not repeated here.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (9)
1. The utility model provides a battery module structure of blocking light which characterized in that includes:
the module shell is provided with a containing cavity for placing the power supply core, the module shell further comprises a fixed middle plate and a fixed end plate, the fixed end plate extends transversely to form one wall surface of the containing cavity, a longitudinally extending mounting hole is formed in the fixed end plate in a penetrating mode, the middle of the fixed middle plate is located in the containing cavity, the fixed middle plate is provided with a welding end, the welding end is used for being inserted and fixed in the mounting hole, and a welding gap extending vertically is formed between one side of the welding end and the inner wall of the mounting hole;
the multistage light blocking assembly comprises a first light blocking part and a second light blocking part, the first light blocking part is arranged on one side of the welding end forming the welding gap, and the second light blocking part is arranged on one side of the first light blocking part away from the fixed end plate and is used for blocking laser together with the first light blocking part in a matched mode; the method comprises the steps of,
the guide limiting structure is arranged on the fixed end plate and used for guiding and limiting the position of the welding end in the mounting hole when the welding end is mounted;
the upper wall surface and the lower wall surface of one end of the mounting hole, which is away from the fixed middle plate, respectively form a first limit surface and a second limit surface, and the first limit surface and the second limit surface are respectively contacted with the upper side surface and the lower side surface of the welding end;
the upper end face of the fixed end plate is provided with a groove which is communicated with the mounting hole, the upper end and the lower end of the groove are all communicated, a side wall of the groove is convexly provided with a guide protrusion which is used for contacting with the side face of the welding end, which is away from the welding gap, a side wall of the groove, which is opposite to the guide protrusion, is provided with a guide inclined surface which extends transversely and inclines towards the fixed middle plate, and one end of the guide inclined surface in the transverse and longitudinal directions extends to the welding gap;
the guide limiting structure comprises the guide protrusion, the guide inclined plane, the end face of the fixed end plate, which faces the fixed middle plate, the first limiting surface and the second limiting surface;
the guide protrusion spans two adjacent wall surfaces of the groove and is located at one side far away from the welding gap, and a certain interval exists between the guide protrusion and the part of the welding end, which is exposed to the mounting hole, after assembly.
2. The light blocking structure of a battery module according to claim 1, wherein a light blocking rubber strip extending up and down is provided at one side of the welding end where the welding gap is formed;
the first light blocking part comprises the light blocking adhesive tape.
3. The light blocking structure of claim 2, wherein the length of the light blocking adhesive tape is L1, and the length of the welding gap in the up-down direction is L2, wherein L1 is greater than or equal to L2.
4. The light blocking structure of a battery module as set forth in claim 2, wherein an adhesive is coated on a side corresponding to the welding end to form the light blocking strip after it is dried.
5. The light blocking structure of claim 1, further comprising an insulating sheet disposed in the accommodating cavity, the insulating sheet being made of a flexible material, the insulating sheet comprising:
the movable piece is arranged corresponding to the mounting hole and is provided with a first end and a second end which are arranged oppositely along the transverse direction; the method comprises the steps of,
the matching piece is arranged on the periphery of the movable piece in a surrounding mode, and the side face, away from the fixed end plate, of the matching piece is used for covering the outer side of the battery cell;
the first end and the matching piece are connected into a whole, and the second end can be bent towards the direction of the fixed end plate after being stressed and is contacted with one side of the welding end forming the welding gap;
the second light blocking portion includes the movable piece.
6. The battery module light blocking structure according to claim 1, further comprising an insulating sheet arranged in the accommodating cavity, wherein the side surface of the insulating sheet, which is away from the fixed end plate, is used for covering the outer side of the battery cell, and a through hole corresponding to the mounting hole is formed in the insulating sheet for the welding end to penetrate;
the second light blocking part comprises a light blocking sheet, the light blocking sheet is made of flexible materials, one end of the light blocking sheet in the transverse direction is fixed on the insulating sheet, and the other end of the light blocking sheet is bent to be in contact with one side of the welding end, where the welding gap is formed.
7. The battery module light blocking structure according to claim 1, wherein the upper side and the lower side of the welding end are each stepped to form two stepped surfaces provided toward the fixed end plate;
the inner cavity of the mounting hole is provided with two abutting surfaces corresponding to the two step surfaces so as to be in tight fit with the two step surfaces.
8. The light blocking structure of claim 1, wherein an aperture of the mounting hole toward one end of the fixing middle plate is greater than a height of the welding end after the connection with the first light blocking portion.
9. A battery module comprising the battery module light blocking structure according to any one of claims 1 to 8.
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| CN202210566003.6A CN115084752B (en) | 2022-05-23 | 2022-05-23 | Battery module light blocking structure and battery module |
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| CN115084752A (en) | 2022-09-20 |
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