CN115513606A - Battery module connecting structure - Google Patents
Battery module connecting structure Download PDFInfo
- Publication number
- CN115513606A CN115513606A CN202211190383.4A CN202211190383A CN115513606A CN 115513606 A CN115513606 A CN 115513606A CN 202211190383 A CN202211190383 A CN 202211190383A CN 115513606 A CN115513606 A CN 115513606A
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- Prior art keywords
- strip
- electric core
- battery module
- arc
- clamping
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Links
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 239000000178 monomer Substances 0.000 description 6
- 238000003466 welding Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
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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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
- H01M50/51—Connection only in series
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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)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention discloses a battery module connecting structure, which comprises a plurality of electric core groups; the battery core group comprises a plurality of single battery cores; electrodes at two ends of the electric core group are respectively and electrically connected with a first connecting sheet and a second connecting sheet; when at least two electric core groups are connected in series, the first connecting sheets and the second connecting sheets of the adjacent electric core groups are mutually fixed and form surface contact connection. According to the battery module connecting structure provided by the invention, the first connecting sheet and the second connecting sheet are arranged at the two ends of the electric core groups, when the electric core groups are connected in series, the first connecting sheet of one electric core group and the second connecting sheet of the other electric core group are fixed to form surface contact connection, so that the connecting area of the two electric core groups is increased, and therefore, compared with the traditional point contact mode, the battery module connecting structure can bear larger current, improves the current bearing capacity of the whole battery module, and is favorable for meeting the development requirements of new energy products on large current.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of batteries, in particular to a battery module connecting structure.
[ background ] A method for producing a semiconductor device
With the continuous development of battery technology and new energy vehicles, battery modules have been developed in the direction of high capacity and high current. Traditional battery module is when the equipment, constitutes parallelly connected electric core group one by one with a plurality of battery cells through the cylinder manifold, then welds the cylinder manifold of adjacent electric core group in order to form the series connection, and then assembles into the battery module that contains a plurality of electric core groups. However, with electric core group adoption welding belong to the electric connection mode of point contact, when the electric current of whole battery module output is great, very easily in the welding part of point contact because of too big electric current leads to generating heat too big and fusing to influence the use of whole battery module, be unfavorable for satisfying equipment such as new energy automobile to the demand of heavy current.
In view of the above, it is desirable to provide a battery module connecting structure to overcome the above-mentioned drawbacks.
[ summary of the invention ]
The invention aims to provide a battery module connecting structure, which aims to solve the problem that welding points in the existing battery module are difficult to bear overlarge current, and improve the electric contact area between adjacent electric core groups so as to improve the current bearing capacity of the whole battery module.
In order to achieve the above objects, the present invention provides a battery module connecting structure, which includes a plurality of electric core groups; the battery cell group comprises a plurality of single battery cells; electrodes at two ends of the electric core group are respectively and electrically connected with a first connecting sheet and a second connecting sheet; when at least two electric core groups are connected in series, the first connecting sheets and the second connecting sheets of the adjacent electric core groups are mutually fixed and form surface contact connection.
In a preferred embodiment, threaded columns are coaxially fixed on the electrodes at the two ends of the electric core group, and the first connecting sheet and the second connecting sheet are fixed on the corresponding threaded columns through nuts.
In a preferred embodiment, the first connecting piece comprises a first fixing piece and a first clamping part arranged on one side of the first fixing piece, which is far away from the side correspondingly connected with the electric core group; the second connecting piece comprises a second fixing piece and a second clamping part which is arranged on one side of the second fixing piece, far away from the side correspondingly connected with the electric core group; the second clamping part is clamped with the first clamping part to form surface contact connection.
In a preferred embodiment, the first engaging portion includes a first clamping strip, the first clamping strip includes a first supporting strip vertically connected to the first fixing plate, and two side edges of an end surface of the first supporting strip, which is far away from one end of the first fixing plate, extend outwards in an arc shape to form a first arc strip with a first opening; the second clamping part comprises a second clamping strip, the second clamping strip comprises a second supporting strip vertically connected to the second fixing piece, and edges of two sides of the end face of one end, far away from the second fixing piece, of the second supporting strip extend outwards to form second arc-shaped strips with second openings; the second arc-shaped strip is clamped into the first arc-shaped strip through the first opening, so that the outer surface of the second arc-shaped strip is in interference abutment with the inner surface of the first arc-shaped strip.
In a preferred embodiment, the first and second arced strips are circular in cross section.
In a preferred embodiment, the first opening is opened at one end of the first arc-shaped strip far away from the first supporting strip; the second opening is formed in one end, far away from the second supporting strip, of the second arc-shaped strip.
In a preferred embodiment, the first engaging portion includes at least one first strip and at least one second strip; the second clamping part comprises at least one second clamping strip which is in one-to-one correspondence with the first clamping strips of the first clamping part, and at least one first clamping strip which is in one-to-one correspondence with the second clamping strips of the first clamping part.
In a preferred embodiment, the lengths of the first clamping strip, the first supporting strip, the second clamping strip and the second supporting strip are all consistent with the length of the electric core group along the extension direction of the cross section of the first clamping strip.
In a preferred embodiment, the first fixing piece and the second fixing piece are connected at two ends thereof by a pair of stopper pieces, respectively.
In a preferred embodiment, the first connecting piece and the second connecting piece are both aluminum sheets.
According to the battery module connecting structure provided by the invention, the first connecting sheet and the second connecting sheet are arranged at the two ends of the electric core groups, when the electric core groups are connected in series, the first connecting sheet of one electric core group and the second connecting sheet of the other electric core group are fixed to form surface contact connection, so that the connecting area of the two electric core groups is increased, and therefore, compared with the traditional point contact mode, the battery module connecting structure can bear larger current, improves the current bearing capacity of the whole battery module, and is favorable for meeting the development requirements of new energy products on large current.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a perspective view of a battery module connection structure according to the present invention;
fig. 2 is a perspective view of the battery module connecting structure shown in fig. 1 from another angle;
fig. 3 is a front view of the battery module connecting structure shown in fig. 1;
FIG. 4 is an enlarged view of the area within circle A of FIG. 3;
fig. 5 is a front exploded view of the battery module connecting structure shown in fig. 1;
fig. 6 is an enlarged view within circle B of fig. 5.
The reference numbers in the figures: 100. a battery module connecting structure; 1. the electric core group; 2. a single cell; 3. a threaded post; 4. a nut; 5. a screw; 6. a limiting sheet; 10. a first connecting piece; 11. a first fixing sheet; 12. a first engaging portion; 121. a first clip strip; 1211. a first support bar; 1212. a first opening; 1213. a first arcuate strip; 20. a second connecting sheet; 21. a second fixing piece; 22. a second engaging portion; 221. a second card strip; 2211. a second supporting strip; 2212. a second opening; 2213. a second arcuate strip.
[ detailed description ] A
In order to make the objects, technical solutions and advantageous technical effects of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
In an embodiment of the present invention, a battery module connecting structure 100 is provided for assembling a plurality of single batteries into a battery module to meet specific voltage and capacity requirements.
As shown in fig. 1, 2, 3 and 5, the battery module connecting structure 100 includes a plurality of electric core packs 1. The battery cell group 1 includes a plurality of unit battery cells 2. In this embodiment, the single battery cell 2 may be a circular lithium battery. Specifically, the monomer electric cores 2 in the electric core group 1 are stacked in double rows, and each row comprises a plurality of monomer electric cores 2 which are arranged on the same plane and have the same electrode direction. Furthermore, the electrodes at the two ends of the electric core group 1 are coaxially fixed with threaded columns 3. Both ends of every monomer electricity core 2 all are equipped with screw thread post 3, and wherein the mode of screw thread post 3 accessible welding or block is fixed at the both ends of monomer electricity core 2. The end of the threaded column 3 far away from the monomer electric core 2 can be provided with a thread groove or can be directly a cylinder body with threads matched with the nut 4.
The electrodes at the two ends of the electric core group 1 are respectively and electrically connected with a first connecting sheet 10 and a second connecting sheet 20. For example, the first connecting plate 10 is connected with the threaded posts 3 on all positive poles of the electric core group 1, and the second connecting plate 20 is connected with the threaded posts 3 on all negative poles of the electric core group 1. A plurality of through holes (not shown in the figure) corresponding to the threaded columns 3 one to one are formed in the first connecting sheet 10 and the second connecting sheet 20, one ends of the threaded columns 3 far away from the monomer electric cores 2 penetrate through the through holes, and then the first connecting sheet 10 and the second connecting sheet 20 are fixed on the corresponding threaded columns 3 through the matching effect of the nuts 4 and the threaded columns 3. In other embodiments, if a threaded hole is opened on the threaded column 3, the threaded hole is aligned with the corresponding through hole, and then the first connecting piece 10 and the second connecting piece 20 are pressed on both ends of the electric core group 1 through the matching of the screw 5 and the threaded hole.
In one embodiment, the first connecting piece 10 and the second connecting piece 20 are both aluminum sheets. Compared with the traditional copper bus plate, the aluminum sheet is adopted to converge the current of the electric core group 1, and on the premise of meeting the requirement of electric connection, the scheme of the aluminum sheet is adopted, so that the whole battery module is lighter in weight and lower in cost.
In the embodiment of the invention, when at least two electric core groups 1 are connected in series, the first connecting piece 10 and the second connecting piece 20 of the adjacent electric core groups 1 are fixed with each other and form surface contact connection, so that the two electric core groups 1 can be connected in series by clamping or surface welding and the like, and the electric connection area of the two electric core groups 1 is increased, thereby improving the current carrying capacity of the electric connection structure of the battery module.
Specifically, as shown in fig. 3-6, the first connecting piece 10 includes a first fixing piece 11 and a first engaging portion 12 disposed on a side of the first fixing piece 11 away from the corresponding connecting electric core set 1. The second connecting piece 20 comprises a second fixing piece 21 and a second clamping part 22 arranged on one side of the second fixing piece 21 far away from the corresponding connecting electric core group 1. Wherein, the first fixing plate 11 and the second fixing plate 21 are both used for fixedly connecting the threaded columns 3 on all the electrodes of the corresponding electric core group 1. The second engaging portion 22 engages with the first engaging portion 12 to form a surface contact connection, that is, the first engaging portion 12 and the second engaging portion 22 are detachably engaged, which facilitates subsequent maintenance work.
Furthermore, the two ends of the first fixing piece 11 and the second fixing piece 21 are respectively connected through a pair of limiting pieces 6. The both sides accessible welding of spacing piece 6 etc. are fixed in the one side that first stationary blade 11 and second stationary blade 21 are close to each other, take place lateral shifting when avoiding first block portion 12 and second block portion 22 joint to promote whole battery module connection structure 100's stability.
Specifically, as shown in fig. 4 and 6, the first engaging portion 12 includes a first locking strip 121. The first clamping strip 121 includes a first supporting strip 1211 connected to the first fixing plate 11 vertically, and two side edges of an end surface of the first supporting strip 1211, which is away from one end of the first fixing plate 11, extend outward in an arc shape to form a first arc strip 1213 with a first opening 1212. The first support strip 1211 is a rectangular strip having a length corresponding to the length of the first fixing piece 11, and is vertically fixed to a central axis of the first fixing piece 11 along the length direction. The two side edges of the top end of the first support strip 1211 extend along two arc lines of a circle to form a hollow cylinder with a first arc-shaped strip 1213 as a first opening 1212. The first opening 1212 is in the form of a linear strip and is parallel to the central axis of the first arcuate strip 1213.
The second engaging portion 22 includes a second engaging strip 221. The second fastening strip 221 includes a second supporting strip 2211 vertically connected to the second fixing piece 21, and two side edges of the end surface of one end of the second supporting strip 2211 far away from the second fixing piece 21 extend outwards to form a second arc strip 2213 with a second opening 2212. The second supporting strip 2211 is a rectangular strip, the length of which is consistent with the length of the second fixing piece 21, and is vertically fixed on the central axis of the second fixing piece 21 along the length direction. The two side edges of the top end of the second supporting strip 2211 respectively extend along two half arcs of a circle to form a hollow cylinder with a gap, the cylinder is the second arc-shaped strip 2213, and the gap is the second opening 2212. The second opening 2212 is in the shape of a linear strip and is parallel to the central axis of the second arc-shaped strip 2213.
The cross sections of the first arc-shaped strip 1213 and the second arc-shaped strip 2213 are circular. Specifically, the first arc-shaped strip 1213 and the second arc-shaped strip 2213 are circular with a certain thickness. It can be appreciated that in this cross-sectional configuration, the circular shape of the first and second arcuate strips 1213, 2213 exhibit corresponding gaps due to the presence of the first and second openings 1212, 2212.
Further, the first opening 1212 is opened at an end of the first arc strip 1213 away from the first support strip 1211. The second opening 2212 is formed at an end of the second arc-shaped strip 2213 far away from the second support strip 2211. The inner walls of the first opening 1212 and the second opening 2212 each have an outwardly flared trumpet-like configuration.
Further, the lengths of the first clamping strip 121, the first supporting strip 1211, the second clamping strip 221 and the second supporting strip 2211 are all consistent with the length of the electric core assembly 1 along the extension direction of the cross section of the first clamping strip 121, so as to improve the stability of connection between the adjacent electric core assemblies 1 and ensure the stress balance during connection.
In an embodiment of the present invention, the second arcuate strip 2213 snaps into the first arcuate strip 1213 through the first opening 1212, such that the outer surface of the second arcuate strip 2213 is in interference abutment with the inner surface of the first arcuate strip 1213. It can be appreciated that the distance of the first opening 1212 is slightly less than the diameter of the second arcuate strip 2213, and the outer circular diameter of the second arcuate strip 2213 is equal to or slightly greater than the inner circular diameter of the first arcuate strip 1213. The second arcuate strip 2213 may be snapped into the interior of the first arcuate strip 1213 by squeezing the first opening 1212 outward, at which point the second opening 2212 is correspondingly retracted to temporarily reduce the diameter of the second arcuate strip 2213, thereby allowing the second arcuate strip 2213 to be snapped into the first arcuate strip 1213 smoothly. The first opening 1212 contracts and the second opening 2212 recovers to the original state, so as to clamp the second arc-shaped strip 2213 in the first arc-shaped strip 1213 to form interference abutment, and further make the first arc-shaped strip 1213 and the second arc-shaped strip 2213 fully abut, and the contact area of the two is the outer circle part of the whole second arc-shaped strip 2213. Compared with the traditional bus bar connecting structure, the technical scheme of the invention improves the connecting area between the adjacent electric core groups 1, thereby correspondingly increasing the over-current capacity.
The widths of the first support strip 1211 and the second support strip 2211 can be increased adaptively, for example, the widths are larger than the inner diameter of the second arc-shaped strip 2213. In addition, the first connecting piece 10 and the second connecting piece 20 are both sheet-shaped structures, so that the heat dissipation performance among the electric core groups 1 can be improved.
In some embodiments, as shown in fig. 3 to 6, the first engaging portion 12 includes at least one first strip 121 and at least one second strip 221; the second engaging portion 22 includes at least one second engaging strip 221 corresponding to the first engaging strip 121 of the first engaging portion 12, and at least one first engaging strip 121 corresponding to the second engaging strip 221 of the first engaging portion 12. That is, the first engaging portion 12 may include the first strip 121, and may also include the second strip 221, and the corresponding second engaging portion 22 has the corresponding second strip 221 and first strip 121. In this embodiment, the first engaging portion 12 includes a first strip 121 and a second strip 221, and the second engaging portion 22 also includes a second strip 221 and a first strip 121, so that the first engaging portion 12 and the second engaging portion 22 are engaged with each other to increase the connecting strength of the two electric core sets 1, and further increase the electric connecting area of the two electric core sets 1.
In summary, according to the battery module connecting structure 100 provided by the invention, the first connecting piece 10 and the second connecting piece 20 are arranged at the two ends of the electric core groups 1, when the electric core groups 1 are connected in series, the first connecting piece 10 of one electric core group 1 and the second connecting piece 20 of the other electric core group 1 are fixed to form surface contact connection, so that the connecting area of the two electric core groups 1 is increased, and thus, compared with the conventional point contact mode, the battery module connecting structure can bear larger current, the current bearing capacity of the whole battery module is improved, and the development requirement of new energy products on large current is favorably met.
The invention is not limited solely to that described in the specification and embodiments, and additional advantages and modifications will readily occur to those skilled in the art, so that the invention is not limited to the specific details, representative apparatus, and illustrative examples shown and described herein, without departing from the spirit and scope of the general concept as defined by the appended claims and their equivalents.
Claims (10)
1. A battery module connecting structure is characterized by comprising a plurality of electric core groups; the battery cell group comprises a plurality of single battery cells; electrodes at two ends of the electric core group are respectively and electrically connected with a first connecting sheet and a second connecting sheet; when at least two electric core groups are connected in series, the first connecting sheets and the second connecting sheets of the adjacent electric core groups are mutually fixed and form surface contact connection.
2. The battery module connecting structure according to claim 1, wherein threaded posts are coaxially fixed to the electrodes at both ends of the electric core pack, and the first connecting piece and the second connecting piece are fixed to the corresponding threaded posts through nuts.
3. The battery module connecting structure according to claim 1, wherein the first connecting piece includes a first fixing piece and a first engaging portion provided at a side of the first fixing piece away from the corresponding side to which the battery cell pack is connected; the second connecting piece comprises a second fixing piece and a second clamping part which is arranged on one side of the second fixing piece, far away from the side correspondingly connected with the electric core group; the second clamping part is clamped with the first clamping part to form surface contact connection.
4. The battery module connecting structure according to claim 3, wherein the first engaging portion comprises a first engaging strip, the first engaging strip comprises a first supporting strip vertically connected to the first fixing plate, and two side edges of an end surface of the first supporting strip, which is away from one end of the first fixing plate, extend outward in an arc shape to form a first arc-shaped strip with a first opening; the second clamping part comprises a second clamping strip, the second clamping strip comprises a second supporting strip vertically connected to the second fixing piece, and edges of two sides of the end face of one end, far away from the second fixing piece, of the second supporting strip extend outwards to form second arc-shaped strips with second openings; the second arc-shaped strip is clamped into the first arc-shaped strip through the first opening, so that the outer surface of the second arc-shaped strip is in interference abutment with the inner surface of the first arc-shaped strip.
5. The battery module connecting structure according to claim 4, wherein the first and second arc-shaped bars are circular in cross section.
6. The battery module connecting structure according to claim 4, wherein the first opening is formed at an end of the first arc-shaped bar away from the first support bar; the second opening is arranged at one end, far away from the second supporting bar, of the second arc-shaped bar.
7. The battery module connecting structure according to claim 4, wherein the first engaging portion includes at least one of the first and second engaging strips; the second clamping part comprises at least one second clamping strip which is in one-to-one correspondence with the first clamping strips of the first clamping part, and at least one first clamping strip which is in one-to-one correspondence with the second clamping strips of the first clamping part.
8. The battery module connecting structure according to claim 4, wherein the first clamping strips, the first supporting strips, the second clamping strips and the second supporting strips have lengths corresponding to the lengths of the electric core packs in the cross-sectional extending direction of the first clamping strips.
9. The battery module connecting structure according to claim 3, wherein both ends of the first fixing piece and the second fixing piece are connected by a pair of stopper pieces, respectively.
10. The battery module connecting structure according to any one of claims 1 to 9, wherein the first connecting tab and the second connecting tab are each an aluminum sheet.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211190383.4A CN115513606B (en) | 2022-09-28 | 2022-09-28 | Battery module connecting structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211190383.4A CN115513606B (en) | 2022-09-28 | 2022-09-28 | Battery module connecting structure |
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| CN115513606A true CN115513606A (en) | 2022-12-23 |
| CN115513606B CN115513606B (en) | 2024-04-05 |
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