CN115117564A - Battery core assembly connecting structure and connecting method thereof, battery core unit, battery module and system - Google Patents
Battery core assembly connecting structure and connecting method thereof, battery core unit, battery module and system Download PDFInfo
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- CN115117564A CN115117564A CN202210802304.4A CN202210802304A CN115117564A CN 115117564 A CN115117564 A CN 115117564A CN 202210802304 A CN202210802304 A CN 202210802304A CN 115117564 A CN115117564 A CN 115117564A
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- electric core
- busbar
- bus bar
- insulating
- electric
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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
- H01M50/505—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising a single busbar
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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
- H01M50/503—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
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
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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 provides a cell assembly connecting structure, a cell assembly connecting method, a cell unit, a cell module and a system, wherein the cell assembly connecting structure is used for connecting a first cell assembly and a second cell assembly, the first cell assembly comprises two first cells, and the second cell assembly comprises two second cells; the electric core assembly connecting structure comprises a busbar in a bending structure, a lead-out hole is formed in the bending part of the busbar, first insulating pieces are arranged on the opposite bending sides of the busbar, and a first tab of a first electric core is attached to the surface of the first insulating piece, penetrates out of the lead-out hole, is bent and attached to the surface of the adjacent busbar; one side of the first utmost point ear of busbar laminating is provided with the second insulating part, and the second utmost point ear of second electricity core is pasted and is located the second insulating part and keep away from a side surface of busbar to buckle press from both sides and establish to between second insulating part and the first utmost point ear with first utmost point ear electric connection, can realize electric core subassembly connection structure minimizing effect.
Description
Technical Field
The invention belongs to the technical field of battery production and preparation, and particularly relates to a cell assembly connecting structure and a connecting method thereof, a cell unit, a module and a system.
Background
In the battery assembling process, the specific energy of the battery is generally required to be improved by connecting a plurality of battery modules in series or in parallel, and when the battery modules are assembled, the lugs of a plurality of battery cells are often welded together through the bus bar, so that the series connection or the parallel connection of the battery cells in the battery modules is realized. The cell connection method is a common cell connection method in which a plurality of cells are connected in series along the length direction of the cells.
At present, generally, adopt to keep flat electric core and electric core, the lug of electric core piles up the back lug and welds the connected mode on the copper bar of establishing ties, realizes the extension of electric core on its length direction, though this kind of connected mode's technology is comparatively simple, but space utilization on electric core length direction is low, leads to its volume utilization to be lower for follow-up equipment obtains the volume energy density and the quality energy density of battery module and battery system all lower, and pack is with high costs. Therefore, it is necessary to develop a cell connection method to improve the space utilization rate of the cell when the cell is expanded in the length direction.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a battery core assembly connecting structure, a connecting method thereof, a battery core unit, a module and a system, wherein the battery core assembly connecting structure provided by the invention can effectively improve the volume utilization rate of an electric core length direction extension structure, so that the volume energy density and the mass energy density of the battery core unit, the battery module and the battery system are obviously improved, and the material cost of a pack structure is reduced.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides an electric core assembly connecting structure, which is used for connecting a first electric core assembly and a second electric core assembly, wherein the first electric core assembly comprises two first electric cores, the second electric core assembly comprises two second electric cores, and the first electric cores and the second electric cores are connected in a one-to-one correspondence manner.
The electric core subassembly connection structure is including being the busbar of the structure of buckling, the department of buckling of busbar has seted up and has run through the exit of busbar, the opposite side of buckling of busbar all is provided with first insulating part, two first electric core sets up one side of the department of buckling of busbar, two the second electric core sets up the opposite side of the department of buckling of busbar, the first utmost point ear subsides of first electric core are located the surface of first insulating part is worn out the exit to buckle and hug closely to being close the surface of busbar.
The busbar laminating one side of first utmost point ear is provided with the second insulator, the second utmost point ear subsides of second electric core are located the second insulator is kept away from a side surface of busbar to buckle press from both sides and establish extremely the second insulator with between the first utmost point ear, and with first utmost point ear electric connection.
In a preferred embodiment of the present invention, the first insulating members disposed on the opposite sides of the bent portion of the busbar are connected to each other to form a bent integrated first insulating member, the integrated first insulating member is engaged with the busbar, a through hole penetrating through the integrated first insulating member is formed at the bent portion of the integrated first insulating member, and the through hole corresponds to the lead-out hole.
Preferably, the second insulating members disposed on the back sides of the bent portions of the bus bar are connected to each other to form a bent integral second insulating member, and the integral second insulating member is engaged with the bus bar.
As a preferable aspect of the present invention, the bus bar includes a first bus bar and a second bus bar that are butted at an angle, a joint of the first bus bar and the second bus bar is a bent portion of the bus bar, the first bus bar and the second bus bar are integrally formed, and the lead-out hole is opened at a joint of the first bus bar and the second bus bar.
Preferably, the busbar includes the end plate, the relative both sides of end plate dog-ear respectively are connected with first busbar and second busbar, the end plate does the department of buckling of busbar, the end plate first busbar with second busbar integrated into one piece, the derivation hole is seted up in on the end plate.
Preferably, after the first tabs of the two first battery cells penetrate through the outlet hole, the first tabs are respectively attached to one side surface of the first busbar away from the first insulating member and one side surface of the second busbar away from the first insulating member, and the second tabs of the two second battery cells are respectively electrically connected with the two first tabs.
In a second aspect, the present invention provides a method for connecting the electric core assembly connecting structure of the first aspect, wherein the connecting method comprises:
after the first tab of first electric core pastes the surface of locating first insulating part and wears out the exit hole in first electric core subassembly, buckle and hug closely to the surface of close busbar, with two second electric cores respectively the level place in the both sides of first electric core subassembly, the second tab of second electric core with close first tab electric connection, first tab with the connection face of second tab coats and is stamped the second insulating part, follows afterwards second electric core the second insulating part carries out the fifty percent discount, forms electric core subassembly connection structure.
As a preferred technical solution of the present invention, the first tabs of the two first battery cells are respectively attached to the surfaces of the bent opposite sides of the integrated first insulating member, and after sequentially passing through the through holes on the integrated first insulating member and the lead-out holes on the busbars, are bent and attached to the surfaces of the adjacent busbars;
preferably, the integrated second insulator is used for covering the connection surface of the first tab and the second tab.
In a third aspect, the invention provides a battery cell unit, along the length direction of the battery cell unit, the battery cell unit includes at least two battery core assemblies connected in sequence, along the thickness direction of the battery cell unit, each battery core assembly includes two battery cores placed in parallel, and adjacent battery core assemblies are connected by the battery core assembly connection structure of the first aspect.
As a preferable technical scheme of the invention, the electric core components are sequentially connected to form a main body part, and a heat dissipation part is further arranged inside the main body part.
Preferably, the heat dissipation member is disposed between two battery cores in the battery core assembly, and the heat dissipation member is of an integrated structure and penetrates through the main body portion.
Preferably, the heat dissipation member is provided with a hollow area corresponding to the connection structure, and the connection structure spans the hollow area to realize connection of the adjacent electric core assemblies.
As a preferable technical scheme of the invention, the electric core components are sequentially connected to form a main body part, and the heat dissipation part is wrapped on the periphery of the main body part.
Preferably, the heat dissipation member is along the both ends of the length direction of electric core unit are uncovered, or the heat dissipation member is along the both ends of the length direction of electric core unit are uncovered, just the heat dissipation member is along the one end of the thickness direction of electric core unit is uncovered.
In a fourth aspect, the invention provides a battery module, which includes the battery cell unit of the third aspect.
In a fifth aspect, the present invention provides a battery system including the battery module according to any one of the above aspects.
Compared with the prior art, the invention has the beneficial effects that:
the electric core assembly connecting structure provided by the invention has the advantages that through the matching of the first insulating part, the bus bar and the second insulating part, the connecting part between the electric core assembly and the electric core assembly is minimized, the volume utilization rate of the electric core length direction extension structure is effectively improved, the volume energy density and the mass energy density of the electric core unit, the battery module and the battery system are obviously improved, and the material cost of a pack structure is reduced.
Drawings
Fig. 1 is a schematic view of a connection structure of an electric core assembly according to an embodiment of the present invention.
Fig. 2 is an enlarged view of the area a in fig. 1.
Fig. 3 is an exploded view of a connection structure of a cell module according to an embodiment of the present invention.
Fig. 4 is an exploded view of a connection structure of a current core assembly according to an embodiment of the present invention.
Fig. 5 is a schematic view illustrating a connection process of a connection structure of an electric core assembly according to an embodiment of the present invention.
Fig. 6 is an exploded schematic view of a battery cell unit according to an embodiment of the present invention.
Fig. 7 is an exploded view of a battery cell unit according to an embodiment of the present invention.
Fig. 8 is an exploded view of a battery cell unit according to an embodiment of the present invention.
Wherein, 10-a first electric core assembly; 11-a first cell; 20-a second electric core assembly; 21-a second cell; 30-electric core component connecting structure; 31-a busbar; 32-a one-piece first insulator; 33-a one-piece second insulator; 40-a heat sink; 41-hollowed-out area.
Detailed Description
It is to be understood that in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be taken as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only 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," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
It should be noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected" and "connected" in the description of the present invention are to be construed broadly and may include, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
In one embodiment, the present invention provides an electric core assembly connecting structure 30, as shown in fig. 1, the electric core assembly connecting structure 30 is used for connecting a first electric core assembly 10 and a second electric core assembly 20, the first electric core assembly 10 includes two first electric cores 11, the second electric core assembly 20 includes two second electric cores 21, and the first electric cores 11 and the second electric cores 21 are connected in a one-to-one correspondence.
As shown in fig. 2, the electric core assembly connection structure 30 includes a busbar 31 having a bending structure, a lead-out hole penetrating through the busbar 31 is formed at a bending position of the busbar 31, first insulating members are disposed on opposite bending sides of the busbar 31, two first electric cores 11 are disposed on one side of the bending position of the busbar 31, two second electric cores 21 are disposed on the other side of the bending position of the busbar 31, and a first tab of a first electric core 11 is attached to a surface of a first insulating member and penetrates through the lead-out hole, and is bent and attached to a surface of the adjacent busbar 31.
One side of the first tab attached to the busbar 31 is provided with a second insulating member, and the second tab of the second battery cell 21 is attached to one side surface of the second insulating member far away from the busbar 31, bent and clamped between the second insulating member and the first tab, and electrically connected with the first tab.
The invention designs the bus bar 31 into a bending structure, and the bending part is provided with the leading-out hole, meanwhile, the first insulating piece is arranged at the opposite side of the bending of the bus bar 31, and the second insulating piece is arranged at the back side of the bending of the bus bar 31, thus realizing the electric connection mode of folding and lapping between the first pole ear in the first electric core assembly 10 and the second pole ear in the second electric core assembly 20, and further minimizing the connection structure between the electric core assemblies; meanwhile, the first insulating part and the second insulating part are arranged in a folding and lapping mode to provide insulation protection, and the safety and the stability of the connecting structure are guaranteed.
The electric core assembly connecting structure 30 provided by the invention minimizes the connecting part between the electric core assembly and the electric core assembly through the matching of the first insulating member, the bus bar 31 and the second insulating member, effectively improves the volume utilization rate of the electric core length direction extension structure, obviously improves the volume energy density and the mass energy density of the electric core unit, the battery module and the battery system, and simultaneously reduces the material cost of a pack structure.
In one embodiment, two first cells 11 are placed in parallel along the thickness direction of the first cell assembly 10; along the thickness direction of the second battery cell assembly 20, two second battery cells 21 are arranged in parallel, and each first battery cell 11 is connected with one second battery cell 21 in a one-to-one correspondence manner.
In one embodiment, along the thickness direction of the first cell assembly 10 or the second cell assembly 20, the size of the cell assembly connecting structure 30 is smaller than or equal to the size of the first cell assembly 10/the second cell assembly 20, so as to avoid the situation that the cell assembly connecting structure 30 causes the low space utilization rate in the thickness direction.
In one embodiment, the first tabs at the same end of the two first cells 11 are respectively attached to the surfaces of the first insulating members disposed at the opposite sides of the bent bus bar 31, and then penetrate through the lead-out holes, and then are bent back to be respectively attached to the opposite sides of the bent bus bar 31.
In a specific embodiment, the second tabs at the same end of the two second battery cells 21 are respectively attached to the surface of the second insulating member disposed on the opposite side of the bending portion of the busbar 31, and are bent and clamped between the second insulating member and the first tabs, and the second tabs of the two second battery cells 21 are respectively overlapped with the adjacent first tabs to be electrically connected in a stacked manner, that is, one first tab is electrically connected to one second tab.
In a specific embodiment, the first insulating members are respectively disposed on opposite sides of the bending of the busbar 31, that is, the split first insulating members are adopted to respectively ensure the insulating effect after the two first tabs are folded, and at this time, the first tabs of the two first battery cells 11 are respectively attached to the surfaces of the two first insulating members and penetrate out of the lead-out holes, and then are bent back to be respectively attached to opposite sides of the bending of the busbar 31.
In one embodiment, as shown in fig. 3 and 4, the first insulating members disposed on the opposite sides of the bent portions of the bus bar 31 are connected to each other to form a bent integrated first insulating member 32, the integrated first insulating member 32 is engaged with the bus bar 31, and the bent portion of the integrated first insulating member 32 is provided with a through hole penetrating through the integrated first insulating member 32, and the through hole corresponds to the lead-out hole.
Namely, the invention can also arrange the integrated first insulating member 32 at the opposite side of the bent busbar 31, that is, the integrated first insulating member 32 is adopted to ensure the insulating effect after the two first tabs are folded, in order to make the first tabs smoothly pass through the lead-out holes, through holes corresponding to the positions of the lead-out holes need to be arranged on the integrated first insulating member 32; at this time, the first tabs of the two first cells 11 are respectively attached to the opposite side surfaces of the bent integrated first insulating member 32, and are bent back after sequentially passing through the through hole and the lead-out hole to be respectively attached to the back sides of the bent bus bar 31.
In a specific embodiment, the second insulating members are respectively disposed on the bent back sides of the bus bar 31, that is, the split second insulating members are respectively adopted to ensure the insulating effect after the two second electrode tabs are folded, at this time, the second electrode tabs of the two second battery cells 21 are respectively attached to a side surface of the two second insulating members away from the bus bar 31, and are bent and clamped between the second insulating members and the first electrode tabs, and the two second electrode tabs are respectively electrically connected with the adjacent first electrode tabs.
In one embodiment, the second insulating members disposed on the opposite sides of the bent portions of the bus bar 31 are connected to each other to form a bent integral second insulating member 33, and the integral second insulating member 33 is engaged with the bus bar 31.
That is, in the present invention, the integral second insulating member 33 may be disposed on the bent opposite side of the busbar 31, that is, the integral second insulating member 33 is adopted to simultaneously ensure the insulating effect after the two second electrode tabs are folded, at this time, the second electrode tabs of the two second battery cells 21 are respectively attached to the bent opposite side surfaces of the integral second insulating member 33, and are bent and clamped between the second insulating member and the first electrode tab, and the two second electrode tabs are respectively electrically connected to the adjacent first electrode tabs.
In one embodiment, the bus bar 31 includes a first bus bar and a second bus bar that are jointed at an angle, the joint of the first bus bar and the second bus bar is a bent part of the bus bar 31, the first bus bar and the second bus bar are integrally formed, and the lead-out hole is opened at the joint of the first bus bar and the second bus bar.
The bus bar 31 formed by the angle butt joint of the first bus bar and the second bus bar has a V-shaped structure.
In one embodiment, the bus bar 31 includes an end plate, the two opposite sides of the end plate are respectively connected with a first bus bar and a second bus bar in a bent manner, the end plate is a bent portion of the bus bar, the end plate, the first bus bar and the second bus bar are integrally formed, and the leading-out hole is opened on the end plate.
The bus bar 31 formed by the end surface, the first bus bar and the second bus bar has a U-shaped structure
It should be noted that, the size and shape of the lead-out hole are not specifically required and limited, and the first tab of the first electrical core 11 is bent after passing through the lead-out hole, so as to implement the bending of the first tab, and a person skilled in the art can adjust the size and shape of the lead-out hole according to the actual bus bar 31 and the size of the tab.
In one embodiment, after the first tabs of the two first battery cells 11 penetrate through the lead-out holes, the first tabs are respectively attached to a side surface of the first bus bar away from the first insulating member and a side surface of the second bus bar away from the first insulating member, and the second tabs of the two second battery cells 21 are respectively electrically connected with the two first tabs.
In one embodiment, the present invention provides a method for connecting the electric core assembly connecting structure 30 in one embodiment, the method comprises:
after the first tab of the first cell 11 in the first cell assembly 10 is attached to the surface of the first insulating member and passes through the lead-out hole, the first tab is bent to be attached to the surface of the adjacent busbar 31, as shown in fig. 5, two second cells 21 are respectively horizontally placed on two sides of the first cell assembly 10, the second tab of the second cell 21 is electrically connected with the adjacent first tab, the connecting surface of the first tab and the second tab is covered with the second insulating member, and then the second cell 21 is folded along the second insulating member to form a connecting structure of the cell assembly.
In the invention, the second tab and the first tab are electrically connected after being overlapped, so that a connecting surface is formed on the side surface of the busbar 31 opposite to the bending side, the second battery cell 21 is integrally folded into the second battery cell assembly 20 after the second insulating piece is pressed on the connecting surface, and in the folding process, the second tab is bent and then attached to one side surface of the second insulating piece far away from the busbar 31, so that the integral folding of the second battery cell 21 is realized.
The connection method provided by the invention is simple to operate, and the effect of minimizing the battery cell assembly connection structure 30 can be realized through the operations of folding the tabs and folding the battery cells.
In one embodiment, the first tab and the second tab are overlapped and then electrically connected by welding.
In a particular embodiment, the welding comprises laser welding.
In one embodiment, prior to welding, a support member is snapped between the bent opposite sides of the busbar 31, the support member conforming to both the shape and size of the busbar 31, and a first insulator is positioned between the busbar 31 and the support member.
In the welding process, the support piece supports the bus bar 31 and the first pole lug and the second pole lug laminated on the surface of the bus bar 31, so that the two layers of pole lugs are tightly pressed with the bus bar 31 in the welding process.
In a specific embodiment, a split type first insulating member is adopted, and after the first tabs of the two first electric cores 11 are respectively attached to the surfaces of the two first insulating members and penetrate out of the lead-out holes, the first tabs are bent back to back and respectively attached to the back sides of the bending portions of the busbar 31.
In one embodiment, the first tabs of the two first battery cells 11 are respectively attached to the surfaces of the bent opposite sides of the integrated first insulating member 32, sequentially pass through the through holes on the integrated first insulating member 32 and the lead-out holes on the bus bars 31, and then are bent to be attached to the surfaces of the adjacent bus bars 31.
Namely, the first electrode tabs of the two first cells 11 are respectively attached to the opposite side surfaces of the bent first insulating member 32, and are bent back after sequentially passing through the through holes and the lead-out holes to be respectively attached to the bent opposite sides of the busbar 31.
In one embodiment, the two second insulating members are used to cover the connecting surfaces formed on the opposite sides of the bent bus bar 31, and then the two second cells 21 are folded along the two second insulating members to form the cell assembly connecting structure 30.
In one embodiment, the connecting surface of the first tab and the second tab is covered with an integral second insulator 33; the two battery cells are folded back to the back along the bending side of the integrated second insulating part 33 respectively to form a battery cell assembly connecting structure 30.
In one embodiment, the present invention provides a cell unit, wherein the cell unit includes at least two cell assemblies connected in sequence along a length direction of the cell unit, each group of cell assemblies includes two cells disposed in parallel along a thickness direction of the cell unit, and adjacent cell assemblies are connected by the cell assembly connection structure 30 in one embodiment.
By adopting the cell component connecting structure 30 provided by the invention to connect a plurality of cell units in the cell units, the volume utilization rate of the cell units in the length direction is effectively improved, so that the volume energy density and the mass energy density of the cell units are obviously improved, and the material cost of a pack structure is correspondingly saved.
In one embodiment, adjacent cell assemblies are connected in series, and two cells in each cell assembly are connected in parallel.
In one embodiment, as shown in fig. 6 and 7, the electric core assemblies are sequentially connected to form a main body, and a heat dissipation member 40 is further disposed inside the main body.
In a specific embodiment, the heat dissipation member 40 is disposed between two battery cells in the battery cell assembly, and the heat dissipation member 40 is an integrated structure and penetrates through the main body portion.
In the invention, two battery cores of each battery core assembly are respectively fixed on the two side surfaces of the heat radiating part 40, namely, along the length direction of the battery core units, the heat radiating plate penetrates through each battery core assembly, so that the heat radiating plate penetrates through the main body part.
In one embodiment, two cells in the cell assembly may be fixed to two side surfaces of the heat sink 40 by means of adhesion.
In one embodiment, heat sink 40 comprises a heat sink plate.
In one embodiment, the heat radiating plate includes any one of a T-shaped heat radiating plate, an i-shaped heat radiating plate, or a line-shaped heat radiating plate.
In one embodiment, the heat dissipation member 40 is formed with a hollow area 41 corresponding to the connection structure, and the connection structure crosses the hollow area 41 to connect the adjacent core assemblies.
The main body part and the heat radiating part 40 of the battery cell unit are assembled simultaneously, firstly, two battery cells (marked as: a battery cell A and a battery cell B) are respectively fixed on the surfaces of two sides of the heat radiating part 40, a busbar 31 crosses a hollow area 41 on the heat radiating part 40, so that busbars on two sides of a bent part of the busbar 31 are respectively positioned on two sides of the heat radiating part 40, after a first insulating part is fixed on the opposite bent side of the busbar 31, lugs on the same end of the battery cell A and the battery cell B are attached to the surface of the first insulating part and penetrate out of a guide hole, and are bent backwards to be respectively attached to the direct bent opposite sides of the busbar; then, the other two cells (marked as cell C and cell D) are respectively and horizontally placed on the sides of the cell a and the cell B away from the heat sink 40, the tabs on the same ends of the cell C and the cell D are respectively and electrically connected with the tabs of the cell a and the cell B, a connecting surface is formed on the bending opposite side of the busbar 31, a second insulating member is pressed on the connecting surface, and the cell C and the cell D are respectively fixed on the surfaces of the two sides of the heat sink 40 after being folded along the second insulating member. In addition, when the integrated first insulating member 32 and the integrated second insulating member 33 are used, both the integrated first insulating member 32 and the integrated second insulating member 33 need to cross the hollow-out area 41.
In one embodiment, as shown in fig. 8, the electric core assemblies are connected in sequence to form a main body portion, and the heat dissipation member 40 is wrapped around the main body portion.
In a specific embodiment, the two ends of the heat dissipation member 40 along the length direction of the battery cell unit are open, or the two ends of the heat dissipation member 40 along the length direction of the battery cell unit are open, and one end of the heat dissipation member 40 along the thickness direction of the battery cell unit is open.
When the heat sink 40 disposed on the outer periphery of the main body is used in the present invention, the main body is assembled and then placed inside the heat sink 40. Further, the heat sink 40 may have a gate-shaped structure or a port-shaped structure.
In a specific embodiment, the battery cell unit further includes a collection detection device.
In one embodiment, the collecting and detecting device is disposed on the bus bar 31 or the battery tab.
In one embodiment, the collection detection device comprises a voltage collection detection device and/or a temperature collection detection device.
In one embodiment, the battery module includes the battery cell unit in one embodiment described above.
In one embodiment, the battery module includes at least two battery cell units connected in series or in parallel.
In one embodiment, a battery system includes the battery module of one embodiment described above.
In one embodiment, the battery system includes at least two battery modules connected in series or in parallel.
A system refers to an equipment system, a device system, or a production device.
The applicant declares that the above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.
Claims (10)
1. The electric core assembly connecting structure is characterized in that the electric core assembly connecting structure is used for connecting a first electric core assembly and a second electric core assembly, the first electric core assembly comprises two first electric cores, the second electric core assembly comprises two second electric cores, and the first electric cores and the second electric cores are connected in a one-to-one correspondence manner;
the electric core assembly connecting structure comprises a busbar with a bending structure, wherein a leading-out hole penetrating through the busbar is formed in the bending position of the busbar, first insulating pieces are arranged on the opposite bending sides of the busbar, two first electric cores are arranged on one side of the bending position of the busbar, two second electric cores are arranged on the other side of the bending position of the busbar, and a first tab of each first electric core is attached to the surface of each first insulating piece, penetrates out of the leading-out hole and is bent and attached to the surface of the adjacent busbar;
the busbar laminating one side of first utmost point ear is provided with the second insulating part, the subsides of second utmost point ear of second electricity core are located the second insulating part is kept away from a side surface of busbar to buckle press from both sides and establish to the second insulating part with between the first utmost point ear, and with first utmost point ear electric connection.
2. The electric core assembly connecting structure according to claim 1, wherein the first insulating members disposed at opposite sides of the bent portions of the bus bars are connected to each other to form a bent integral first insulating member, the integral first insulating member is engaged with the bus bars, and a through hole is formed at the bent portion of the integral first insulating member and penetrates through the integral first insulating member, the through hole corresponding to the lead-out hole;
preferably, the second insulating members disposed on the back sides of the bent portions of the bus bar are connected to each other to form a bent integral second insulating member, and the integral second insulating member is engaged with the bus bar.
3. The electric core assembly connecting structure according to claim 1 or 2, wherein the bus bars comprise a first bus bar and a second bus bar which are in folded angle butt joint, the butt joint of the first bus bar and the second bus bar is a bent part of the bus bars, the first bus bar and the second bus bar are integrally formed, and the leading-out hole is formed at the butt joint of the first bus bar and the second bus bar;
preferably, the bus bar comprises an end plate, the two opposite sides of the end plate are respectively connected with a first bus bar and a second bus bar in a folded manner, the end plate is a bent part of the bus bar, the end plate, the first bus bar and the second bus bar are integrally formed, and the leading-out hole is formed in the end plate;
preferably, after the first tabs of the two first battery cells penetrate through the outlet hole, the first tabs are respectively attached to one side surface of the first busbar away from the first insulating member and one side surface of the second busbar away from the first insulating member, and the second tabs of the two second battery cells are respectively electrically connected with the two first tabs.
4. A method for connecting the structure for connecting the cell modules according to any one of claims 1 to 3, wherein the method for connecting comprises:
after the first tab of first electric core pastes the surface of locating first insulating part and wears out the exit hole in first electric core subassembly, buckle and hug closely to the surface of close busbar, with two second electric cores respectively the level place in the both sides of first electric core subassembly, the second tab of second electric core with close first tab electric connection, first tab with the connection face of second tab coats and is stamped the second insulating part, follows afterwards second electric core the second insulating part carries out the fifty percent discount, forms electric core subassembly connection structure.
5. The connecting method according to claim 4, wherein the first tabs of the two first battery cells are respectively attached to the surfaces of the bent opposite sides of the integrated first insulating member, sequentially pass through the through holes in the integrated first insulating member and the lead-out holes in the busbars, and then are bent and attached to the surfaces of the adjacent busbars;
preferably, the integrated second insulator is used for covering the connection surface of the first tab and the second tab.
6. An electric core unit, characterized in that, along the length direction of the electric core unit, the electric core unit comprises at least two electric core assemblies connected in sequence, along the thickness direction of the electric core unit, each group of the electric core assemblies comprises two electric cores placed in parallel, and the adjacent electric core assemblies are connected by the electric core assembly connecting structure of any one of claims 1-3.
7. The cell unit of claim 6, wherein the cell assemblies are sequentially connected to form a main body part, and a heat dissipation part is further arranged inside the main body part;
preferably, the heat dissipation member is disposed between two battery cells in the battery cell assembly, and the heat dissipation member is of an integrated structure and penetrates through the main body portion;
preferably, the heat dissipation member is provided with a hollow area corresponding to the connection structure, and the connection structure spans the hollow area to realize connection of the adjacent electric core assemblies.
8. The cell unit of claim 6, wherein the cell core assemblies are sequentially connected to form a main body part, and a heat dissipation part is wrapped on the periphery of the main body part;
preferably, the heat dissipation member is along the both ends of the length direction of electric core unit are uncovered, or the heat dissipation member is along the both ends of the length direction of electric core unit are uncovered, just the heat dissipation member is along the one end of the thickness direction of electric core unit is uncovered.
9. A battery module, characterized in that the battery module comprises the battery cell unit of any one of claims 6-8.
10. A battery system, characterized in that the battery system comprises the battery module according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210802304.4A CN115117564B (en) | 2022-07-07 | 2022-07-07 | Battery cell assembly connection structure, connection method thereof, battery cell unit, module and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210802304.4A CN115117564B (en) | 2022-07-07 | 2022-07-07 | Battery cell assembly connection structure, connection method thereof, battery cell unit, module and system |
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| CN115117564A true CN115117564A (en) | 2022-09-27 |
| CN115117564B CN115117564B (en) | 2023-07-07 |
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| CN210379226U (en) * | 2019-07-05 | 2020-04-21 | 恒大新能源科技集团有限公司 | No busbar battery module structure |
| CN210897456U (en) * | 2019-12-05 | 2020-06-30 | 昆山宝创新能源科技有限公司 | Battery module |
| CN112510322A (en) * | 2020-11-23 | 2021-03-16 | 上海卡耐新能源有限公司 | Battery module and battery pack |
| CN113067108A (en) * | 2021-03-23 | 2021-07-02 | 远景动力技术(江苏)有限公司 | Busbar subassembly, battery module and vehicle |
| CN215933713U (en) * | 2021-08-25 | 2022-03-01 | 远景动力技术(江苏)有限公司 | Battery module |
| WO2022067693A1 (en) * | 2020-09-30 | 2022-04-07 | 东莞新能安科技有限公司 | Battery module, battery pack, and electronic device |
| CN216597892U (en) * | 2021-10-09 | 2022-05-24 | 恒大新能源技术(深圳)有限公司 | Connection structure of electricity core module, electricity core module and battery |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210379226U (en) * | 2019-07-05 | 2020-04-21 | 恒大新能源科技集团有限公司 | No busbar battery module structure |
| CN210897456U (en) * | 2019-12-05 | 2020-06-30 | 昆山宝创新能源科技有限公司 | Battery module |
| WO2022067693A1 (en) * | 2020-09-30 | 2022-04-07 | 东莞新能安科技有限公司 | Battery module, battery pack, and electronic device |
| CN112510322A (en) * | 2020-11-23 | 2021-03-16 | 上海卡耐新能源有限公司 | Battery module and battery pack |
| CN113067108A (en) * | 2021-03-23 | 2021-07-02 | 远景动力技术(江苏)有限公司 | Busbar subassembly, battery module and vehicle |
| CN215933713U (en) * | 2021-08-25 | 2022-03-01 | 远景动力技术(江苏)有限公司 | Battery module |
| CN216597892U (en) * | 2021-10-09 | 2022-05-24 | 恒大新能源技术(深圳)有限公司 | Connection structure of electricity core module, electricity core module and battery |
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| CN115117564B (en) | 2023-07-07 |
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