CN111554848A - Module box, soft packet of lithium cell module - Google Patents
Module box, soft packet of lithium cell module Download PDFInfo
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- CN111554848A CN111554848A CN202010418568.0A CN202010418568A CN111554848A CN 111554848 A CN111554848 A CN 111554848A CN 202010418568 A CN202010418568 A CN 202010418568A CN 111554848 A CN111554848 A CN 111554848A
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- plate
- bus bar
- bar support
- module
- cover plate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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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
- H01M50/531—Electrode connections inside a battery casing
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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 module box body and a soft package lithium battery module, wherein the module box body comprises: the device comprises a bottom plate, a cover plate, a pair of oppositely arranged end plates and a pair of oppositely arranged side plates, wherein the end plates and the side plates surround the periphery of the bottom plate to form a cavity, and the cover plate covers the tops of the end plates and the side plates; the cover plate and/or the side plate on at least one side are/is formed by a bus bar support plate; the bus bar support plate is provided with a bus bar, and the bus bar is provided with a plurality of tab connecting ports penetrating through the bus bar support. The invention saves the middle frame, reduces the structural members of the battery module, simplifies the structure, reduces the cost and the weight of the module, improves the structural strength and improves the bending resistance and the torsion resistance of the module along the length direction.
Description
Technical Field
The invention belongs to the technical field of power batteries, and particularly relates to a module box body and a soft package lithium battery module.
Background
Soft-packaged power battery has advantages such as the security performance is good, light in weight, capacious, internal resistance is little, and each big battery factory is all researching and developing soft-packaged electricity core at present, but soft-packaged electricity core's group structural design is more complicated, and structural influence factor that needs to consider is also relatively more.
The structural style that the laminate polymer battery module of present mainstream adopted is the soft packet of structure that has the center, is about to during electric core imbeds the center, and the center is plastic frame, and the center can protect electric core and provide the structural support, has inlayed the conducting strip on the center simultaneously, and the conducting strip contacts electric core, and the conducting strip is the passageway that electric core and external world carried out the heat exchange. Due to the use of a large number of middle frames, the module is high in weight and cost.
From this, in order to reduce the shared proportion of auxiliary structure such as center in module weight, the laminate polymer battery module structural design who has a few cancelled the center has appeared among the prior art. For example:
patent document with application number 201921421830.6 discloses a soft packet of lithium cell module structure, it includes electric core, and a housing, the shell includes the plate, lower plate, the after-fixing board, a front fixing board, the lower left corner of front and back fixed plate is provided with the injecting glue hole respectively, be provided with the heat conduction material on the lower plate, the heat conduction material upside is provided with the whole module of battery, upper portion is provided with the FPC bearing plate in the whole module of battery, FPC bearing plate downside is connected with the connection feeler, it is connected to the Busbar to connect the feeler downside, PCB bearing plate middle part is provided with the signal output connector, electric core unit connects in series and connects in parallel constitutes the module, the bus subassembly is connected at the module both ends, the bus subassembly includes insulating part and Busbar, the inside hole that is provided with of Busbar, the insulating part includes guide structure.
It can be seen that although the soft-package battery module structure does not contain the middle frame, the following serious defects exist:
firstly, the whole mechanical structure intensity of this module structure is whole to be guaranteed by outside shell (being the battery box), and parallelly connected electric core unit is parallelly connected to constitute the module after, wholly sets up in the shell, six of module all by the shell cladding, does not have connection structure between module and the shell, appears the clearance easily and takes place not hard up, causes the security problem.
Two, although the both sides of module are equipped with the Busbar subassembly, the Busbar subassembly includes insulating part and Busbar, but the Busbar can only play the electric connection effect, the insulating part also can only carry out certain support to the top seal position of parallelly connected two three electricity cores and fill, the Busbar subassembly of this module can not carry out mechanical connection to all electric core units and fix, it is whole to be guaranteed by outside shell to lead to the fixed connection between the adjacent electric core unit, it is unsafe, and both include the shell in the module structure, include Busbar subassembly (insulating part) again, it is still higher to lead to the shared weight proportion of structure, make still limited to the improvement of the energy density of soft packet of lithium cell module.
Thirdly, because of the light-weight design requirement of the battery module and the height restriction of the module, the upper plate and the lower plate in the shell can not be too thick and heavy, and the module is formed by stacking a plurality of battery cell units in sequence, when the number of the battery cell units is increased, along the stacking direction of the battery cell units, the lengths of the upper plate, the lower plate, the front fixing plate and the rear fixing plate of the shell are correspondingly lengthened, the strength of the square frame formed by the upper plate, the lower plate, the front fixing plate and the rear fixing plate is weaker, the more the number of the battery cell units, the poorer the bending resistance and the torsion resistance of the square frame are, and the structural strength of the battery module in the.
Disclosure of Invention
The invention mainly aims to provide a module box body and a soft-package lithium battery module, and aims to solve the problem that a structural member in the existing soft-package lithium battery module is large in weight and proportion.
In order to achieve the above object, the present invention provides a module box for a soft package lithium battery, including: the device comprises a bottom plate, a cover plate, a pair of oppositely arranged end plates and a pair of oppositely arranged side plates, wherein the end plates and the side plates surround the periphery of the bottom plate to form a cavity, and the cover plate covers the tops of the end plates and the side plates; the cover plate and/or the side plate on at least one side are/is formed by a bus bar support plate; the bus bar support plate is provided with a bus bar, and the bus bar is provided with a plurality of tab connecting ports penetrating through the bus bar support.
Preferably, the cover plate and/or the side plate on at least one side are formed by a plurality of bus bar support plates arranged side by side, and the arrangement direction of the bus bar support plates is consistent with the arrangement direction of the soft package battery core.
Preferably, two the curb plate comprises a plurality of busbar mounting panels of arranging side by side, the up end of busbar mounting panel, terminal surface all are equipped with the screw hole down, the relative both sides of apron are equipped with apron screw via hole, the relative both sides of bottom plate are equipped with bottom plate screw via hole, apron screw via hole bottom plate screw via hole with screw hole position one-to-one, busbar mounting panel with apron and bottom plate pass through screw fixed connection.
Preferably, a top clamping piece is arranged on the upper end surface of the busbar support plate, a top clamping opening is formed between the top clamping piece and the busbar support plate, and two sides of the cover plate are clamped in the top clamping opening; the lower terminal surface of busbar mounting plate is equipped with bottom buckle piece, bottom buckle piece with form the bottom bayonet socket between the busbar mounting plate, the bottom plate both sides card is located in the bottom bayonet socket.
Preferably, the busbar mounting plate is made of plastic materials, an insulating protective cover is arranged on the outer side of the busbar, and the insulating protective cover is connected with the busbar mounting plate in a buckling mode.
Preferably, the cover plate and the bottom plate are both made of metal, and the end plate comprises: the outer end plate is made of metal materials, the plastic insulating plate is made of plastic materials, the outer end plate is bonded to the outer side of the plastic insulating plate, or the outer end plate and the plastic insulating plate are integrally formed through injection molding; the cover plate and the bottom plate are both welded with the outer end plate.
Preferably, two sides of the cover plate close to the busbar support are bent to form first cover plate wrapping edges, two sides of the cover plate close to the end plate are bent to form second cover plate wrapping edges, two sides of the upper end surface of the end plate close to the busbar support are recessed to form first buckling parts, the outer side of the upper end surface of the end plate is recessed to form fourth buckling parts, the first cover plate wrapping edges are buckled with the first buckling parts, and the second cover plate wrapping edges are buckled with the fourth buckling parts; the utility model discloses a bus bar support, including bottom plate, bus bar support, bottom plate, the inboard protrusion of bottom plate is formed with the convex part, being close to of the lower terminal surface of end plate the both sides of bus bar support are sunken to be formed with the second buckling parts, the middle sunken third buckling parts that is formed with of the lower terminal surface of end plate, bottom plate cladding limit with second buckling parts lock, the convex part with third buckling parts lock.
The invention also provides a soft package lithium battery module, which comprises:
the module case of any of the above;
the battery module, including a plurality of laminate polymer battery cores that pile up in proper order, the battery module is located in the module box, laminate polymer battery core's utmost point ear passes utmost point ear connector, utmost point ear with the busbar welding.
Preferably, foam is clamped between the soft package battery cores; the bottom end of the soft package battery cell is bonded on the bottom plate through a heat conduction structure adhesive.
Preferably, the end plate is provided with a pole, and the two busbars at the tail ends of the positive electrode and the negative electrode are respectively connected with the two poles; soft packet of lithium battery module still includes: the FPC gathers the circuit, FPC gathers the circuit with the busbar is connected.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
firstly, the invention designs a novel module box body structure of a soft package battery cell, a busbar support plate for installing a busbar is directly used as a cover plate or a side plate of the box body, the busbar is fixed on a busbar support, and a battery cell tab in the box body can be directly connected to the box body through a tab connecting port.
Secondly, in some embodiments of the present invention, one or both sides of the module box body may adopt a single bus bar support plate, or may adopt a plurality of bus bar support plates arranged side by side, when one side of the module box body is composed of a plurality of bus bar support plates, each bus bar support plate is connected with an adjacent cover plate or side plate, that is, a multi-point connection structure is realized, when the number of battery cells in the battery module is increased and the length of the box body is increased, the multi-point connection structure is adopted to increase the overall structural strength of the box body and the bending and torsion resistance of the box body along the stacking direction of the battery cells;
moreover, on the basis of improving the structural strength of the box body through multipoint connection, the inner side of the bus bar support plate can be hollowed out, and the cover plate used for insulating and sealing on the outer side of the bus bar support plate can also be processed to be thin, so that compared with the box body structure with heavy weight due to the fact that the side plate and the bus bar support of the existing box body are both thick, the weight of the whole box body can be reduced, and the light weight of the box body is achieved.
Thirdly, the arrangement direction of the bus bar support plates is the same as the stacking direction of each soft-package battery cell, each soft-package battery cell is clamped between two end plates, because a structure that a plurality of bus bar support plates are arranged side by side is adopted, each bus bar support plate is provided with a single bus bar with a corresponding specification, when the number of the soft package battery cores is increased and the length of the module needs to be lengthened correspondingly, the invention adopts a square frame formed by connecting a plurality of bus bar support plates with side plates and/or cover plates and a bottom plate in a multi-point way, the bending resistance and torsion resistance are better, the feasibility of expanding and lengthening the module in the length direction is improved, and, when the soft-packaged electrical core quantity changed, through the quantity of corresponding change busbar mounting panel, and/or the corresponding width specification who changes single busbar mounting panel, just can correspond the length that changes the module box, more convenient flexibility when making module series-parallel number increase or reduce.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is an exploded view of a structure of a soft package lithium battery module according to an embodiment of the present invention;
fig. 2 is an exploded view of a module box in the soft-package lithium battery module set shown in fig. 1;
fig. 3 is a structural diagram of a bus bar support plate in the soft-package lithium battery module set shown in fig. 1;
fig. 4 is another structural diagram of a bus bar support plate in the soft package lithium battery module set forth in fig. 1;
fig. 5 is a connection structure diagram of a cover plate, a bottom plate and an end plate in the soft package lithium battery module set shown in fig. 1;
FIG. 6 is an exploded view of FIG. 5;
fig. 7 is a structural diagram of a position of a heat-conducting structural adhesive in the soft-package lithium battery module set forth in fig. 1;
fig. 8 is a schematic structural diagram of a soft package battery cell in a soft package lithium battery module according to another embodiment of the present invention.
The invention is illustrated by the reference numerals:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 1 | Cover plate | 1-1 | Cover plate screw through hole |
| 1-2 | First cover plate coating edge | 1-3 | Second cover |
| 2 | Base plate | 2-1 | Through hole of bottom plate screw |
| 2-2 | Baseboard coating edge | 2-3 | Convex |
| 3 | End plate | 3-1 | First buckling part |
| 3-2 | Second fastening part | 3-3 | Third buckling part |
| 3-4 | The fourth buckling |
4 | Bus bar support plate |
| 4-1 | Screw hole | 4-2 | Top buckle piece |
| 4-3 | Top bayonet | 4-4 | Bottom fastener |
| 4-5 | |
5 | Bus bar |
| 5-1 | |
6 | Insulation |
| 7 | Soft-packaged battery cell | 7-1 | Tab for fixing a |
| 8 | |
9 | Heat-conducting |
| 10 | Pole post | 11 | FPC acquisition circuit |
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.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a module box body and a soft package lithium battery module adopting the module box body.
Soft packet of lithium cell module includes: the module box with locate the battery module in the module box, the battery module is piled up in proper order by a plurality of laminate polymer electric cores and is constituted. For convenience of description, both ends of the soft packing cell in the stacking direction thereof are defined as front and rear ends.
The module box includes: be located respectively, the apron of lower position, the bottom plate, be located respectively before, the both ends board of back position, and be located respectively left, the both sides board of right side position, the apron, the bottom plate, synthetic cavity is enclosed to both ends board and both sides board, wherein, the apron, one or arbitrary both in the both sides board comprise the busbar mounting panel, be fixed with the busbar on the busbar mounting panel, be used for connecting electric core utmost point ear, a plurality of laminate polymer core stack in proper order into the battery module and place in the cavity, laminate polymer core's positive pole utmost point ear and negative pole utmost point ear can be established in the same one side of electric core, also can establish respectively in the both sides of electric core.
In some embodiments, one or both sides of the module box body can adopt a whole bus bar support plate or a plurality of bus bar support plates arranged side by side, and the battery cell tabs can be directly connected to the box body through the tab connectors by the design of the bus bar support plates.
When one side of the module box body is composed of a plurality of bus bar support plates, each bus bar support plate is connected with the adjacent cover plate or side plate, namely, a multipoint connection structure is realized, and when the number of the battery cells in the battery module is increased and the length of the box body is increased, the multipoint connection structure is adopted to increase the overall structural strength of the box body and the bending resistance and the torsion resistance of the box body along the stacking direction of the battery cells; moreover, on the basis of improving the structural strength of the box body through multipoint connection, the inner side of the bus bar support plate can be hollowed out, and the cover plate used for insulating and sealing on the outer side of the bus bar support plate can also be processed to be thin, so that compared with the box body structure with heavy weight due to the fact that the side plate and the bus bar support of the existing box body are both thick, the weight of the whole box body can be reduced, and the light weight of the box body is achieved.
Please refer to fig. 1 to 7, the soft package battery cell 7 in fig. 1 has its positive electrode tab and negative electrode tab respectively led out from the opposite two sides of the battery cell, corresponding to the soft package battery cell of this structure, in the module box, the two side plates are two rows of bus bar support plates 4, the bus bar support plates 4 are plate-shaped, each bus bar support plate 4 in each bus bar support plate 4 is arranged side by side along the front-back direction, the bottom ends of the end plate 3 and the bus bar support plates 4 are fixed on the bottom plate 2, the cover plate 1 covers the top ends of the end plate 3 and the bus bar support plates 4, and the battery is accommodated in the module cavity.
The bus bar 5 is fixed on the outer side of the bus bar support plate 4, the bus bar 5 can be combined with the bus bar support plate 4 into a whole in an injection molding mode, a bonding mode or a hot melting mode, the bus bar 5 is provided with a lug connecting port 5-1, and the bus bar support plate 4 is provided with a lug passing port corresponding to the lug connecting port 5-1 in position, so that the lug connecting port 5-1 can penetrate through the bus bar support plate 4. When the battery module is installed in the module box body, the tabs 7-1 on the two sides of the soft-package battery cell 7 can be just inserted into the tab connecting ports 5-1 and welded on the outer side surface of the bus bar 3.
Each bus bar support 4 corresponds to the corresponding bus bar 5 in size and specification, the bus bar supports 4 with different specifications correspond to the lug connectors 5-1 with different quantities, and the bus bar supports 4 with different specifications are selected, so that the soft package battery cells 7 can be electrically connected according to the designed series-parallel connection relationship.
Thereby enabling the user to make a decision,
firstly, the invention creatively designs a novel module box body structure, a bus bar support plate 4 for mounting a bus bar 5 is directly used as a side plate of the box body, and the bus bar support plate 4, an end plate 3, a bottom plate 2 and a cover plate 1 are enclosed together to form the box body structure.
Secondly, a middle frame is arranged in the module box body in the prior art, so as to wrap the battery cell through the middle frame for protection, and each bus bar support plate 4 in the embodiment is connected with the cover plate 1 and the bottom plate 2, namely, the plurality of bus bar support plates 4 are connected with the cover plate 1 and the bottom plate 2 at multiple points, so that the formed closed cuboid box body is high in overall structural strength, and the soft package battery cell 7 can be protected without the middle frame;
and, because the upper and lower both ends of busbar mounting plate 4 can carry out fine connection fixedly with apron 1, bottom plate 2 respectively, make utmost point ear connector 5-1 on busbar 5 fixed in the position of whole module box, after the both ends cartridge of soft-packaged electrical core 7 is located and is welded to utmost point ear connector 5-1, can guarantee the rigidity of each soft-packaged electrical core 7 promptly, make each soft-packaged electrical core 7 need not to install the box through the center again, also make from this and save the center, further reduce the structure of whole battery module, the structure is simplified, the cost and the weight of module have been reduced, energy density is improved.
Thirdly, the arrangement direction of the bus bar support plates 4 is the same as the stacking direction of each soft-package battery cell 7, when the number of the soft-package battery cells 7 is increased and the length of the module needs to be lengthened correspondingly, compared with a square frame structure formed by surrounding four simple plates, in the embodiment, the square frame formed by connecting a plurality of bus bar support plates 4, the cover plate 1 and the bottom plate 2 in a multi-point manner is better in bending resistance and torsion resistance, and the feasibility of extending and lengthening the module in the length direction is improved;
and, when 7 quantity of soft-packaged electrical core change, through the quantity of corresponding change busbar mounting plate 4, and/or the corresponding width specification that changes single busbar mounting plate 4 (correspond every busbar 5 can parallelly connected soft-packaged electrical core quantity increase), just can correspond the length that changes the module box, more convenient nimble when making module series-parallel number increase or reduce.
Furthermore, in the module box body, the bottom plate 2 and the cover plate 1 are made of metal materials; the bus bar support plate 4 is made of plastic materials, an insulating protective cover 6 is arranged on the outer side of a bus bar 5 of the bus bar support plate 4, and the insulating protective cover 6 is connected with the bus bar support plate 4 in a buckling mode; the end plate 3 is composed of an outer end plate 3-4 and a plastic insulating plate 3-5, the outer end plate 3-4 is made of metal, the plastic insulating plate 3-5 is made of plastic, and the outer end plate 3-4 is integrally connected with the plastic insulating plate 3-5 through a bonding mode or integrally formed with the plastic insulating plate 3-5 through an injection molding mode.
The left side and the right side of the bottom plate 2 are provided with bottom plate screw through holes 2-1, and the lower end face of the bus bar support plate 4 is provided with screw holes 4-1. Two end plates 3 and two busbar mounting plates 4 enclose into the quadrangle and then are arranged on the upper surface of the bottom plate 2, the busbar mounting plates 4 and the bottom plate 2 are fixed through screws, and the end plates 3 and the bottom plate 2 are fixed through welding. Cover plate screw through holes 1-1 are formed in the left side and the right side of the cover plate 1, screw holes 4-1 are formed in the upper end face of the bus bar support plate 4, the cover plate 1 is buckled on the tops of the end plate 3 and the bus bar support plate 4, the bus bar support plate 4 and the cover plate 1 are fixed through screws, and the end plate 3 and the cover plate 1 are fixed through welding.
Furthermore, the upper end face of the busbar support plate 4 is provided with a top clamping piece 4-2, a top bayonet 4-3 is formed between the top clamping piece 4-2 and the busbar support plate 4, the top bayonets 4-3 of the two rows of busbar support plates 4 face each other, and the left side and the right side of the cover plate 1 are inserted into the top bayonet 4-3. The lower end face of the busbar support plate 4 is provided with bottom clamping pieces 4-4, bottom bayonets 4-5 are formed between the bottom clamping pieces 4-4 and the busbar support plate 4, the bottom bayonets 4-5 of the two rows of busbar support plates 4 face each other, and the left side and the right side of the bottom plate 2 are inserted into the bottom bayonets 4-5. Make, made things convenient for and carried out screwed connection with busbar mounting panel 4 and apron 1 and bottom plate 2 fixed, also made the structure of module box more firm.
In order to further improve the connection strength of the cover plate 1, the end plate 3 and the bus bar support plate 4, the left side and the right side of the cover plate 1 are bent downwards to form a first cover plate coating edge 1-2, a cover plate screw hole 1-1 is arranged on the first cover plate coating edge 1-2, the front side and the rear side of the cover plate 1 are bent downwards to form a vertical second cover plate coating edge 1-3, correspondingly, the left side and the right side of the upper end surface of the end plate 3 are sunken to form a first buckling part 3-1, the outer side of the upper end surface of the end plate 3 is sunken to form a fourth buckling part 3-4, the first cover plate coating edge 1-2 is buckled with the first buckling part 3-1, and the second cover plate coating edge 1-3 is buckled with the fourth buckling part 3-4. In order to further improve the connection strength of the bottom plate 2, the end plate 3 and the bus bar support plate 4, the left side and the right side of the bottom plate 2 are bent upwards to form bottom plate coating edges 2-2, bottom plate screw through holes 2-1 are formed in the bottom plate coating edges 2-2, the inner side of the bottom plate 2 protrudes upwards to form convex portions 2-3, the left side and the right side of the lower end face of the end plate 3 are sunken to form second buckling portions 3-2, the middle of the lower end face of the end plate 3 is sunken to form third buckling portions 3-3, the bottom plate coating edges 2-2 are buckled with the second buckling portions 3-2, and the convex portions 2-3 are buckled with the third buckling portions 3-3. From this, the holistic structure steadiness of module box has further been improved.
Further, because soft-packaged electrical core 7 can produce the inflation at the charge-discharge in-process, consequently press from both sides the cotton 8 of bubble of establishing a certain amount between soft-packaged electrical core 7, bubble cotton 8 can play the cushioning effect. Because soft-packaged electrical core 7 mainly carries out the heat exchange through metal material's bottom plate 2 and external, consequently still be equipped with the heat conduction structure between soft-packaged electrical core 7 and bottom plate 2 and glue 9, soft-packaged electrical core 7's no banding side is glued 9 bonds on bottom plate 2 through the heat conduction structure, improves the heat dispersion of module.
Further, the battery module still includes: utmost point post 10, FPC acquisition line 11, utmost point post 10 include anodal utmost point post and negative pole utmost point post, establish respectively on two end plates 3, are located two terminal busbar 5 of positive negative pole and are connected with the utmost point post 10 that corresponds respectively, and the voltage that soft-packaged electrical core 7 produced exports through utmost point post 10. The FPC collection line 11 is connected to the bus bar 5, and is used to transmit collected voltage signals and the like to the module management system.
Refer to fig. 8, the laminate polymer core in fig. 8, positive pole ear and negative pole ear are established in the same one side of electric core, to the laminate polymer core of this kind of structure, apron in the module box adopts a plurality of busbar mounting plates to arrange side by side and constitutes, the direction of arranging of busbar mounting plate also is unanimous with the arrangement direction of laminate polymer core in the module box, the bottom plate of module box, synthetic cavity is enclosed to a pair of end plate and a pair of curb plate, laminate polymer core piles up and constitutes battery module back holding in the module box, again with the top of a plurality of busbar mounting plates fixed connection at end plate and curb plate, busbar on the busbar mounting plate respectively with the utmost point ear welding of corresponding position.
Thereby enabling the user to make a decision,
firstly, a bus bar support plate for mounting a bus bar is directly adopted to form the box body, so that a bus bar mounting support is omitted compared with the existing module box body, the structural member of a battery module is saved, and the weight of the box body is reduced;
secondly, each bus bar support plate positioned at the top is connected with the side plate, so that the overall strength of the box body is improved in a multi-point connection mode, a middle frame can be omitted, and the cost and the weight of the box body are greatly reduced;
thirdly, in order to ensure the sealing performance of the box body of the whole module, the area size and the thickness size of a small cover plate arranged at the bus bar mounting position of a bus bar support plate are much smaller than those of the cover plate of the existing box body, the weight of the bus bar support plate and the small cover plate is also reduced compared with the overall weight of the existing bus bar mounting support and the cover plate, and the weight of the box body is further reduced;
fourthly, when the quantity of soft-packaged electrical core increases, if adopt current module box structure, the bending resistance and the torsional resistance of the mouth style of calligraphy frame that constitutes by apron, bottom plate and both sides board of current box are enough not enough, make the bulk strength of box not enough, and in this embodiment, because the multiple spot connected mode of busbar mounting panel and curb plate can improve the bending resistance and the torsional resistance of box in electric core stacking direction, improve the bulk strength of module.
Further, in order to guarantee that the soft-packaged battery cell is stably positioned in the module box body, the non-tab side glue of the soft-packaged battery cell can be glued in the box body.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The utility model provides a module box for soft packet of lithium cell, its characterized in that includes: the device comprises a bottom plate, a cover plate, a pair of oppositely arranged end plates and a pair of oppositely arranged side plates, wherein the end plates and the side plates surround the periphery of the bottom plate to form a cavity, and the cover plate covers the tops of the end plates and the side plates; the cover plate and/or the side plate on at least one side are/is formed by a bus bar support plate; the bus bar support plate is provided with a bus bar, and the bus bar is provided with a plurality of tab connecting ports penetrating through the bus bar support.
2. The module box body as claimed in claim 1, wherein the cover plate and/or at least one side plate is formed by a plurality of bus bar support plates arranged side by side, and the arrangement direction of the bus bar support plates is consistent with the arrangement direction of the soft package cells.
3. The module box body as claimed in claim 2, wherein the two side plates are composed of a plurality of bus bar support plates arranged side by side, screw holes are formed on the upper end surface and the lower end surface of each bus bar support plate, cover plate screw through holes are formed on two opposite sides of the cover plate, base plate screw through holes are formed on two opposite sides of the base plate, the positions of the cover plate screw through holes, the positions of the base plate screw through holes and the screw holes are in one-to-one correspondence, and the bus bar support plates are fixedly connected with the cover plate and the base plate through screws.
4. The module box body as claimed in claim 2, wherein the upper end surface of the busbar support plate is provided with a top snap piece, a top bayonet is formed between the top snap piece and the busbar support plate, and two sides of the cover plate are snapped in the top bayonet;
the lower terminal surface of busbar mounting plate is equipped with bottom buckle piece, bottom buckle piece with form the bottom bayonet socket between the busbar mounting plate, the bottom plate both sides card is located in the bottom bayonet socket.
5. The module housing as claimed in any one of claims 1 to 4, wherein the bus bar support plate is made of plastic material, and an insulating protective cover is provided on the outer side of the bus bar, and the insulating protective cover is connected with the bus bar support plate in a snap-fit manner.
6. The modular cabinet of claim 5, wherein the cover and the base are made of metal, and the end plate comprises: the outer end plate is made of metal materials, the plastic insulating plate is made of plastic materials, the outer end plate is bonded to the outer side of the plastic insulating plate, or the outer end plate and the plastic insulating plate are integrally formed through injection molding; the cover plate and the bottom plate are both welded with the outer end plate.
7. The modular cabinet of claim 6,
two sides of the cover plate close to the bus bar support are bent to form first cover plate coating edges,
two sides of the cover plate close to the end plate are bent to form second cover plate coating sides,
two sides of the upper end surface of the end plate, which are close to the bus bar support, are concavely provided with first buckling parts,
a fourth buckling part is concavely formed on the outer side of the upper end surface of the end plate,
the first cover plate is buckled with the first buckling part, and the second cover plate is buckled with the fourth buckling part;
two sides of the bottom plate close to the bus bar support are bent to form bottom plate coating edges,
a convex part is convexly formed on the inner side of the bottom plate,
two sides of the lower end surface of the end plate, which are close to the bus bar support, are concavely provided with second buckling parts,
a third buckling part is concavely formed in the middle of the lower end surface of the end plate,
the bottom plate coating edge is buckled with the second buckling part, and the convex part is buckled with the third buckling part.
8. The utility model provides a soft packet of lithium cell module which characterized in that includes:
the modular case of any one of claims 1 to 7;
the battery module, including a plurality of laminate polymer battery cores that pile up in proper order, the battery module is located in the module box, laminate polymer battery core's utmost point ear passes utmost point ear connector, utmost point ear with the busbar welding.
9. The soft-package lithium battery module of claim 8, wherein foam is sandwiched between the soft-package cells; the bottom end of the soft package battery cell is bonded on the bottom plate through a heat conduction structure adhesive.
10. The soft-package lithium battery module according to claim 8 or 9, wherein the end plate is provided with a terminal post, and the two busbars at the tail ends of the positive electrode and the negative electrode are respectively connected with the two terminal posts; soft packet of lithium battery module still includes: the FPC gathers the circuit, FPC gathers the circuit with the busbar is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010418568.0A CN111554848A (en) | 2020-05-18 | 2020-05-18 | Module box, soft packet of lithium cell module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010418568.0A CN111554848A (en) | 2020-05-18 | 2020-05-18 | Module box, soft packet of lithium cell module |
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| Publication Number | Publication Date |
|---|---|
| CN111554848A true CN111554848A (en) | 2020-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010418568.0A Pending CN111554848A (en) | 2020-05-18 | 2020-05-18 | Module box, soft packet of lithium cell module |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113224436A (en) * | 2021-04-29 | 2021-08-06 | 珠海冠宇动力电池有限公司 | Battery module |
| CN115051095A (en) * | 2022-06-30 | 2022-09-13 | 东莞新能安科技有限公司 | Electrochemical device, charging system, and power consumption device |
| CN115241592A (en) * | 2022-07-21 | 2022-10-25 | 中国第一汽车股份有限公司 | Solid-state battery module |
| CN115312983A (en) * | 2022-02-22 | 2022-11-08 | 上海奥威科技开发有限公司 | Energy storage module and energy storage bag thereof |
-
2020
- 2020-05-18 CN CN202010418568.0A patent/CN111554848A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113224436A (en) * | 2021-04-29 | 2021-08-06 | 珠海冠宇动力电池有限公司 | Battery module |
| CN115312983A (en) * | 2022-02-22 | 2022-11-08 | 上海奥威科技开发有限公司 | Energy storage module and energy storage bag thereof |
| CN115051095A (en) * | 2022-06-30 | 2022-09-13 | 东莞新能安科技有限公司 | Electrochemical device, charging system, and power consumption device |
| CN115051095B (en) * | 2022-06-30 | 2024-02-13 | 东莞新能安科技有限公司 | Electrochemical device, charging system and electric equipment |
| CN115241592A (en) * | 2022-07-21 | 2022-10-25 | 中国第一汽车股份有限公司 | Solid-state battery module |
| WO2024016876A1 (en) * | 2022-07-21 | 2024-01-25 | 中国第一汽车股份有限公司 | Solid-state battery module |
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Effective date of registration: 20230920 Address after: No. 46, Qingfu Anshijia, Guoxiangqiao Village, Lanjiang Street, Yuyao City, Ningbo City, Zhejiang Province, 315402 Applicant after: Yuyao Haitai Trading Co.,Ltd. Address before: Room g0232, headquarters building, Changsha Zhongdian Software Park, No. 39, Jianshan Road, high tech Development Zone, Changsha City, Hunan Province, 410013 Applicant before: Thornton New Energy Technology (Changsha) Co.,Ltd. |