CN116581484A - Integrated busbar assembly and battery module - Google Patents

Integrated busbar assembly and battery module Download PDF

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Publication number
CN116581484A
CN116581484A CN202310799482.0A CN202310799482A CN116581484A CN 116581484 A CN116581484 A CN 116581484A CN 202310799482 A CN202310799482 A CN 202310799482A CN 116581484 A CN116581484 A CN 116581484A
Authority
CN
China
Prior art keywords
busbar
circuit board
printed circuit
flexible printed
integrated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310799482.0A
Other languages
Chinese (zh)
Inventor
申曜维
李新澎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lishen Qingdao New Energy Co Ltd
Original Assignee
Lishen Qingdao New Energy Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lishen Qingdao New Energy Co Ltd filed Critical Lishen Qingdao New Energy Co Ltd
Priority to CN202310799482.0A priority Critical patent/CN116581484A/en
Publication of CN116581484A publication Critical patent/CN116581484A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/258—Modular batteries; Casings provided with means for assembling
    • 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
    • H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
    • 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
    • H01M50/519—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising printed circuit boards [PCB]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The invention discloses an integrated busbar assembly and a battery module, wherein the integrated busbar assembly comprises a flexible printed circuit board, a busbar combination and an integrated busbar bracket which are sequentially overlapped from top to bottom; a flexible printed circuit board connector is arranged on a connector fixing bracket at the bottom of one end of the integrated busbar bracket; the top of the integrated busbar bracket is provided with a busbar combination; the busbar combination comprises a total negative busbar, a series busbar and a total positive busbar which are distributed at intervals; the flexible printed circuit board is arranged at the top of the busbar combination; a plurality of connecting sheets arranged on the flexible printed circuit board are connected with the busbar combination; the total negative bus bar and the total positive bus bar are electrically connected to one external bus bar, respectively. The integrated busbar assembly and the battery module provided by the invention can safely and reliably connect a plurality of large cylindrical batteries in the battery module together, and ensure the connection strength and reliability.

Description

Integrated busbar assembly and battery module
Technical Field
The invention relates to the technical field of batteries, in particular to an integrated busbar assembly and a battery module.
Background
The lithium ion battery has the advantages of high specific energy, multiple recycling times, long storage time and the like, is widely applied to portable electronic equipment (such as mobile phones, digital cameras and portable computers) and is widely applied to large and medium-sized electric equipment such as electric automobiles, electric bicycles, electric tools and the like, so that the performance requirement on the lithium ion battery is higher and higher.
Currently, for large cylindrical batteries, such as 4680 and 4695, the cruising ability, the power output and the energy are greatly improved and the production cost is effectively reduced compared with the common cylindrical batteries (such as 18650 cylindrical batteries).
The 4680 large cylindrical battery is a cylindrical battery with a cell diameter of 46mm and a height of 80 mm; the 4695 large cylindrical battery is a cylindrical battery with a cell diameter of 46mm and a height of 95 mm.
In order to better meet the use demands of customers in the fields of electric automobiles and the like, a plurality of large cylindrical batteries are required to be assembled into a large cylindrical battery module.
However, for the existing large cylindrical battery module, the connection structure between the large cylindrical batteries is not firm enough, which affects the overall service life and safe operation of the large cylindrical battery module.
Disclosure of Invention
The invention aims at solving the technical defects existing in the prior art and provides an integrated busbar assembly and a battery module.
The invention provides an integrated busbar assembly, which comprises a flexible printed circuit board, a busbar combination and an integrated busbar bracket, wherein the flexible printed circuit board, the busbar combination and the integrated busbar bracket are sequentially overlapped from top to bottom;
a connector fixing bracket is arranged at the bottom of one end of the integrated busbar bracket;
the top of the integrated busbar bracket is provided with a busbar combination;
the busbar combination comprises total negative busbars, series busbars and total positive busbars which are distributed at intervals;
the top of the busbar assembly is provided with a flexible printed circuit board;
a plurality of connecting sheets arranged on the flexible printed circuit board and connected with the busbar combination;
the total negative bus bar and the total positive bus bar are respectively connected with one external bus bar in a conductive way;
one end of the flexible printed circuit board is provided with a flexible printed circuit board connector;
the flexible printed circuit board connector is inserted into the connector fixing bracket.
The invention also provides a battery module, which comprises at least one battery serial combination;
each battery series combination comprises a plurality of batteries which are connected in series;
the plurality of cells in each cell series combination are connected in series by the series bus in the integrated bus assembly described above.
Compared with the prior art, the integrated busbar assembly and the battery module are scientific in design, and can safely and reliably connect a plurality of large cylindrical batteries in the battery module together, so that the connection strength and reliability are ensured.
Through inspection, the integrated busbar assembly and the battery module provided by the invention can bear larger external extrusion force, can effectively improve the safety performance of the large cylindrical battery module, and prolong the overall service life of the large cylindrical battery module.
Drawings
Fig. 1 is an exploded perspective view of an integrated busbar assembly according to the present invention;
fig. 2 is a schematic enlarged view of a left end of an integrated busbar assembly according to the present invention;
fig. 3 is a schematic enlarged view of a left end of an integrated busbar assembly when placed upside down;
fig. 4 is an enlarged schematic view of a three-dimensional structure of a connector fixing bracket in an integrated busbar assembly according to the present invention;
fig. 5 is a schematic view of a three-dimensional exploded structure of a battery module according to the present invention;
fig. 6 is a schematic perspective view of a battery module according to the present invention;
fig. 7 is a schematic structural diagram of a battery module without an integrated busbar assembly according to the present invention;
fig. 8 is a left side view of the battery module shown in fig. 5 in a battery module case;
fig. 9 is a schematic view of a structure in which eight batteries (partial batteries) included in the battery module shown in fig. 5 are connected by a serial bus bar;
fig. 10 is a schematic view showing the positional relationship of eight batteries (partial batteries) included in the battery module shown in fig. 5, which are connected by a series bus bar;
fig. 11 is a schematic view showing a connection structure between a total negative bus bar and a negative cover plate of an adjacent battery in the battery module according to the present invention;
fig. 12 is a schematic view showing a connection structure between a total positive bus bar and a positive electrode post of an adjacent battery in the battery module according to the present invention;
fig. 13 is a schematic view showing the positions of three thermistors disposed on a flexible printed circuit board of a battery module according to the present invention.
In the figure, 1. An integrated busbar bracket; 2. a connector fixing bracket; 3. a total negative bus; 4. a serial bus; 5. total positive bus bar;
6. a flexible printed circuit board; 7. a flexible printed circuit board connector; 8. a hot melt column; 9. a connecting sheet; 12. the water cooling plate, 13, the battery, 14, the water inlet, 15, the water outlet and 16, the thermistor;
100. the batteries are combined in series, a clamping block, a limiting guide boss guide groove and a battery positioning open groove are formed in the front end of the battery;
200. the integrated busbar assembly comprises a busbar assembly body, a clamping block accommodating groove, a limiting guide boss, a limiting block, a connector inserting limiting block, a connector limiting inserting groove, a limiting guide groove and a stop block, wherein the clamping block accommodating groove is formed in the busbar assembly body, the limiting guide boss is formed in the clamping block accommodating groove, the connector is inserted into the limiting block, and the connector is limited and inserted into the limiting guide groove and the limiting guide groove is formed in the clamping block accommodating groove;
300. battery module case 601, bent plate, 1301, positive electrode post, 1302, negative electrode cover plate.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of this patent, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "disposed" are to be construed broadly, and may be fixedly connected, disposed, detachably connected, disposed, or integrally connected, disposed, for example. The specific meaning of the terms in this patent will be understood by those of ordinary skill in the art as the case may be.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Referring to fig. 1 to 13, the present invention provides an integrated busbar assembly comprising a flexible printed circuit board 6, a serial busbar 4, an integrated busbar holder 1 and a busbar combination which are stacked in this order from top to bottom;
the bottom of one end of the integrated busbar bracket 1 is provided with a connector fixing bracket 2;
the top of the integrated busbar bracket 1 is provided with a busbar combination;
the busbar combination comprises a total negative busbar 3, a series busbar 4 and a total positive busbar 5 which are distributed at intervals;
a flexible printed circuit board 6 is arranged on the top of the busbar assembly;
a plurality of connection pieces 9 provided on the flexible printed circuit board 6 and connected to the busbar assembly;
the total negative bus bar 3 and the total positive bus bar 5 are respectively connected with one external bus bar in a conductive way;
one end of the flexible printed circuit board 6 is provided with a flexible printed circuit board connector 7;
the flexible printed circuit board connector 7 is inserted into the connector fixing bracket 2.
In the present invention, in particular, one end of the flexible printed circuit board 6 is provided with a bending plate 601 which is bent downward;
the side of the flexible printed circuit board connector 7 facing the bending plate 601 is provided with a reinforcing plate;
the reinforcing plate is bonded to the bending plate 601.
The serial bus bar 4 is used for connecting a plurality of batteries 13 included in one battery module in series, that is, positive electrodes and negative electrodes of the plurality of batteries are connected together in a designed serial manner, and specifically may be connected (e.g. welded) with positive electrode posts 1301 (i.e. positive electrode posts at the center of the top of a battery cover) or negative electrode cover plates 1302 (i.e. other separated regions of the top of a battery case except for the positions of the positive electrode posts 1301) of the plurality of batteries 13; the positive electrode pole 1301 of any one battery 13 in the battery module can be connected with the negative electrode cover plate 1302 of other batteries through the serial bus bar 4 to realize serial connection, namely, the positive electrode and the negative electrode of the batteries are connected in sequence; when a plurality of batteries are provided, the specific connection mode of the series connection and the connection sequence of the batteries are various, and are known in the prior art, and are not described herein.
The total negative bus bar 3 and the total positive bus bar 5 are used to connect the negative output head ends and the positive output tail ends of the plurality of cells 13 connected in series by the series bus bar 4, respectively.
It should be noted that, after the integrated busbar assembly is installed in a matched manner, one battery module can form a battery system through two external buses connected with the integrated busbar assembly in a serial-parallel connection manner with other battery modules. Of course, the power supply device may be connected to the positive electrode and the negative electrode of the load to supply power to the load.
The load refers to a device for receiving electric energy in a circuit, and is a generic term for various electric appliances. For example, common loads are air conditioning, electric power consuming electrical equipment such as motors on electric vehicles, and the like.
In the present invention, the connection piece 9 may be a metal sheet, such as a copper sheet, a nickel sheet, or preferably a nickel sheet, which is easy to conduct and transmit signals.
In the invention, the connector fixing bracket 2 is clamped with a clamping groove arranged at the bottom of one end of the integrated busbar bracket 1 through a buckle.
In the present invention, the connector fixing bracket 2 protrudes downward from the bottom of the integrated busbar bracket 1.
In the invention, the total negative bus bar 3, the serial bus bar 4 and the total positive bus bar 5 are fixedly arranged at the top of the integrated bus bar bracket 1 in a hot melting mode;
the flexible printed circuit board 6 is fixed above the integrated busbar bracket 1 in a hot melting mode and is positioned at the top of the busbar combination;
a plurality of gaps are reserved in the busbar combination and are respectively used for passing through a plurality of hot melt connecting pieces.
Preferably, the hot melt connection is a hot melt post 8;
the top of the integrated busbar support 1 is provided with a plurality of hot melt columns 8.
Preferably, the top of the integrated busbar holder 1 is provided with a total negative busbar accommodating groove, a series busbar accommodating groove and a total positive busbar accommodating groove, respectively, at positions corresponding to one end of the total negative busbar 3, the entirety of the series busbar 4 and one end of the total positive busbar 5.
In the present invention, a plurality of connection pieces 9 provided on the flexible printed circuit board 6 are soldered to the total positive bus bar, the series bus bar, and the total negative bus bar, respectively.
The total positive bus bar, the series bus bar, and the total negative bus bar are soldered to the connection pads 9 on the flexible printed circuit board 6.
In the present invention, in particular, a plurality of (e.g., two) cartridge receiving grooves 201 are provided in parallel at the top of the connector fixing bracket 2;
one clamping block 101 is respectively arranged at the bottom of one end of the integrated busbar bracket 1 and at the position corresponding to each clamping block accommodating groove 201 at the top of the connector fixing bracket 2;
each clamping block 101 is respectively and correspondingly clamped with one clamping block accommodating groove 201.
In particular, a limit guide boss 202 is respectively arranged on the front side and the rear side of the top of the connector fixing bracket 2;
two limit guide boss guide grooves 102 are formed in the bottom of one end of the integrated busbar support 1 at positions corresponding to the two limit guide bosses 202;
each limit guide boss 202 is respectively clamped with one limit guide boss guide groove 102.
The clamping block 101 and the limit guide boss guide groove 102 are both arranged at the bottom of the integrated busbar support 1. Namely, the integrated busbar bracket 1 adopts a sinking design, so that the design of the whole height can be reduced, and a space is provided for installing the busbar among modules.
In the concrete implementation, two connector insertion limiting blocks 203 which are symmetrically distributed in the front-back direction are arranged on the outer side of the connector fixing support 2;
the opposite sides of the two connector insertion limiting blocks 203 are provided with connector limiting insertion grooves 204 which are vertically distributed;
the front and rear sides of the flexible printed circuit board connector 7 are inserted into the two connector limit insertion grooves 204.
Preferably, the outer side of the connector fixing bracket 2 is further provided with a limit guide groove 205 at a position where two connectors are inserted between the limit blocks 203;
the flexible printed circuit board connector 7 is provided with a stopper at a position corresponding to the stopper guide groove 205;
the limiting block is clamped with the limiting guide groove 205.
Preferably, a stopper 206 is provided immediately below the limit guide groove 205.
In the present invention, one end of the flexible printed circuit board 6 is bent vertically in the direction of the flexible printed circuit board connector 7 and then connected to the flexible printed circuit board connector 7.
In the invention, in particular implementation, a plurality of battery positioning open slots 103 are arranged at the bottom of the integrated busbar bracket 1;
the plurality of battery positioning open grooves 103 are correspondingly arranged on the top ends (namely the top of the battery cover) of the plurality of batteries in the battery module (particularly the large cylindrical battery module) to be assembled;
each battery is positioned in an open slot 103 for insertion into the top of a battery.
Based on the integrated busbar assembly provided by the invention, referring to fig. 5 to 13, the invention also provides a battery module (i.e. a large cylindrical battery module) comprising at least one battery serial combination 100;
each of the battery serial combinations 100 includes a plurality of batteries 13 connected in series with each other;
the plurality of cells 13 in each cell series combination 100 are connected in series by the series bus 4 in the integrated bus assembly 200 described above.
In a specific implementation of the present invention, when the battery module includes more than two battery serial combinations 100, the more than two battery serial combinations 100 are connected in parallel, in series, or in series-parallel.
Preferably, referring to fig. 5 and 6, the battery module includes two battery serial combinations 100;
the two cells are connected in parallel in series combination 100.
Preferably, each cell series combination 100 comprises two rows of cells connected in series by a series bus 4 in the integrated bus assembly 200;
each row of cells comprises a plurality of cells 13 (e.g. eight) distributed laterally;
each cell series assembly 100 includes two rows of cells separated on opposite sides by a water cooled plate 12;
in particular, two battery serial combinations 100 are located in a battery module case 300.
In particular, the flexible printed circuit board connector 7 is located in the gap between the two water cooled plates 12.
In particular, each water cooling plate 12 is closely attached to the side surface of the adjacent battery 13.
Preferably, each water cooling plate 12 is a hollow cavity, and the right end of the hollow cavity is provided with a water inlet 14 and a water outlet 15.
The water inlet 14 and the water outlet 15 are connected to the existing external liquid cooling device through hollow connecting pipes, respectively. For example: the water inlet 14 and the water outlet 15 are respectively communicated with a liquid outlet and a liquid inlet of an external cooling pump (such as a water pump) through hollow connecting pipelines, and cooling liquid is injected into the connecting pipelines in advance.
The cooling liquid is flame-retardant cooling liquid or water. Wherein the external cooling pump (such as a water pump) is used for providing circulating power for the cooling liquid, thereby ensuring that the cooling liquid can flow in the relevant connecting pipe and controlling the flow speed of the cooling liquid. In particular, a radiator and a heater may be installed on a connection pipe between the water inlet 14 and the water outlet 15 and an external cooling pump (e.g., a water pump) to facilitate heat dissipation treatment of the cooling liquid in summer and heat treatment of the cooling liquid in winter.
In particular, the battery is a cylindrical battery, preferably a large cylindrical battery, such as 4680, 4695 and other types of large cylindrical batteries.
Since one end of the flexible printed circuit board 6 is bent toward the flexible printed circuit board connector 7 and the flexible printed circuit board connector 7 is fixed by the connector fixing bracket 2, the fixing of the flexible printed circuit board connector 7 is achieved by a narrow space between two water-cooled plates, as shown in fig. 8.
In the present invention, for the cylindrical battery 13, only the top cylindrical positive electrode post 1301 is the positive electrode, and the rest of the battery case is the negative electrode (i.e., the negative electrode cap plate).
In the present invention, the total negative bus bar, the series bus bar and the total positive bus bar are all current carrying, each connecting the connecting piece 9 (e.g., nickel piece) and the battery 13, the plurality of connecting pieces 9 are welded to the total negative bus bar 3, the series bus bar 4 and the total positive bus bar 5, and the total negative bus bar 3, the series bus bar 4 and the total positive bus bar 5 are welded to the battery 13.
In the present invention, the flexible printed circuit board 6 is used for taking charge of the communication of the circuit and the acquisition of the information (such as voltage) and temperature of the battery through a plurality of connecting pieces 9 (such as nickel pieces) which are connected with an external temperature acquisition device and are arranged on the flexible printed circuit board.
In particular, the flexible printed circuit board 6 is connected with an external temperature collector through the flexible printed circuit board connector 7 and an external wire harness end connector.
Referring to fig. 13, a plurality of (e.g., three) thermistors 16 are provided on the flexible printed circuit board 6 for contact with the top of the battery for temperature acquisition.
In addition, it should be noted that, with the integrated busbar assembly provided by the present invention, the following functions can be exerted in the battery module:
1. the plurality of individual cells 13 are connected together by a busbar assembly on the integrated busbar assembly to form a module, while the busbar assembly provides current carrying.
2. In the integrated busbar assembly, the functions of battery information and temperature acquisition can be realized through the connecting sheet 9 (such as a nickel sheet) and the connected external temperature acquisition device.
3. The connector fixing support is used for fixing the flexible printed circuit board connector, so that the structure is stable.
4. And the integrated busbar bracket is used for taking charge of the supporting function of each part in the whole integrated busbar assembly.
In summary, the technical solution of the present invention can provide a fixing manner of the flexible printed circuit board connector 7 and a serial-parallel scheme of the cylindrical battery module in a narrow space without affecting the distribution of the cylindrical battery.
In particular, referring to fig. 10, the pointing position of the a circle is that the serial bus bar 4 is welded with the positive electrode (specifically, the positive electrode post) at the center position of the top of the four batteries 13, the pointing position of the B circle is that the serial bus bar 4 is welded with the negative electrode cover plate of the four batteries 13, wherein, the cylindrical batteries 13 only have the positive electrode post at the top of the cylindrical batteries as the positive electrode, the other battery cases are all negative electrodes (specifically, the negative electrode cover plate separated from the positive electrode post), and the orientation of each battery 13 is the same, so that the mutual serial connection of a plurality of batteries 13 (specifically, four batteries, paired with the other four batteries respectively, can be realized. In the case that the total negative bus bars and the total positive bus bars at the two ends are not involved, the connection of the middle batteries of the battery module is shown by referring to fig. 9, and the connection of the total negative bus bars and the total positive bus bars is shown by referring to fig. 11 and 12, wherein the total negative bus bars are not contacted with the positive pole post at the center of the top of the battery 13, but are contacted with the negative pole part of the battery 13; and the total positive bus bar is only the positive pole that contacts the top center of the cell 13. In the current scheme, the total number of batteries is even. And can be adjusted to be odd according to the needs of users.
Based on the above technical scheme, the application of the invention is beneficial to reliably fixing and limiting the flexible printed circuit board connector 7, solves the problem that the traditional large-cylinder battery core module cannot reliably fix the flexible printed circuit board connector sometimes due to space limitation, and ensures the service life of the flexible printed circuit board connector.
By the application of the invention, the invention can be suitable for different large-cylinder battery modules by adjusting the partial size of the integrated busbar assembly and the serial connection and parallel connection quantity of batteries.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims (10)

1. The integrated busbar assembly is characterized by comprising a flexible printed circuit board (6) and a busbar combination and integrated busbar bracket (1) which are sequentially overlapped from top to bottom;
a connector fixing bracket (2) is arranged at the bottom of one end of the integrated busbar bracket (1);
the top of the integrated busbar bracket (1) is provided with a busbar combination;
the busbar combination comprises a total negative busbar (3), a series busbar (4) and a total positive busbar (5) which are distributed at intervals;
a flexible printed circuit board (6) is arranged at the top of the busbar assembly;
a plurality of connecting pieces (9) arranged on the flexible printed circuit board (6) are connected with the busbar combination;
a total negative busbar (3) and a total positive busbar (5) which are respectively connected with an external busbar in an electrically conductive manner;
one end of the flexible printed circuit board (6) is provided with a flexible printed circuit board connector (7);
the flexible printed circuit board connector (7) is inserted into the connector fixing bracket (2).
2. An integrated busbar assembly according to claim 1, wherein one end of the flexible printed circuit board (6) is provided with a bent plate (601) bent downward;
a reinforcing plate is arranged on one side of the flexible printed circuit board connector (7) facing the bending plate (601);
the reinforcing plate is adhered to the bending plate (601);
and/or the connector fixing support (2) is clamped with a clamping groove arranged at the bottom of one end of the integrated busbar support (1) through a buckle.
3. The integrated busbar assembly according to claim 1, wherein the total negative busbar (3), the series busbar (4) and the total positive busbar (5) are fixedly arranged on top of the integrated busbar bracket (1) by means of hot melting;
the flexible printed circuit board (6) is fixed above the integrated busbar bracket (1) in a hot melting mode and is positioned at the top of the busbar combination;
a plurality of gaps are reserved in the busbar combination and are respectively used for passing through a plurality of hot melt connecting pieces.
4. An integrated busbar assembly according to claim 3, wherein the hot melt connection is a hot melt post (8);
a plurality of hot melting columns (8) are arranged at the top of the integrated busbar bracket (1);
and/or, the top of the integrated busbar bracket (1) is respectively provided with a total negative busbar placing groove, a series busbar placing groove and a total positive busbar converging groove at positions corresponding to one end of the total negative busbar (3), the whole of the series busbar (4) and one end of the total positive busbar (5);
and/or a plurality of connecting pieces (9) arranged on the flexible printed circuit board (6) are respectively welded with the total positive bus bar, the serial bus bar and the total negative bus bar.
5. The integrated busbar assembly according to claim 1, wherein a plurality of clip receiving grooves (201) are provided in parallel at the top of the connector fixing bracket (2);
one end bottom of the integrated busbar bracket (1) is provided with a clamping block (101) at a position corresponding to each clamping block accommodating groove (201) at the top of the connector fixing bracket (2);
each clamping block (101) is respectively and correspondingly clamped with one clamping block accommodating groove (201).
6. The integrated busbar assembly according to claim 5, wherein the front and rear sides of the top of the connector fixing bracket (2) are further provided with a limit guide boss (202), respectively;
two limit guide boss guide grooves (102) are formed in the bottom of one end of the integrated busbar support (1) at positions corresponding to the two limit guide bosses (202);
each limit guide boss (202) is correspondingly clamped with one limit guide boss guide groove (102).
7. The integrated busbar assembly according to claim 5, wherein two connector insertion limiting blocks (203) symmetrically distributed front and back are arranged on the outer side of the connector fixing bracket (2);
one side of the two connector inserting limiting blocks (203) opposite to each other is provided with connector limiting inserting grooves (204) which are vertically distributed;
the front side and the rear side of the flexible printed circuit board connector (7) are spliced with two connector limiting insertion grooves (204);
and/or, the outside of the connector fixing bracket (2) is provided with a limit guide groove (205) at the position between the two connectors inserted into the limit blocks (203);
a flexible printed circuit board connector (7) provided with a stopper at a position corresponding to the stopper guide groove (205);
the limiting block is clamped with the limiting guide groove (205);
and/or, a stop block (206) is arranged right below the limit guide groove (205).
8. The integrated busbar assembly according to claim 1, wherein one end of the flexible printed circuit board (6) is bent perpendicularly to the direction of the flexible printed circuit board connector (7) and connected to the flexible printed circuit board connector (7);
and/or, the bottom of the integrated busbar bracket (1) is provided with a plurality of battery positioning open slots (103);
and the battery positioning open grooves (103) are arranged corresponding to the top ends of the batteries in the battery module.
9. A battery module characterized by comprising at least one battery series combination (100);
each cell series combination (100) comprises a plurality of cells (13) connected in series with each other;
a plurality of cells (13) in each cell series combination (100) are connected in series by a series bus (4) in an integrated bus assembly (200) as claimed in any one of claims 1 to 8.
10. The battery module according to claim 9, wherein when the battery module includes two or more battery series combinations (100), the two or more battery series combinations (100) are connected in parallel, in series, or in series-parallel;
and/or each cell series combination (100) comprising two rows of cells connected in series by a series bus (4) in an integrated busbar assembly (200);
each row of cells comprises a plurality of cells (13) distributed transversely;
each cell series (100) includes two rows of cells separated on opposite sides by a water cooled plate (12).
CN202310799482.0A 2023-06-30 2023-06-30 Integrated busbar assembly and battery module Pending CN116581484A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310799482.0A CN116581484A (en) 2023-06-30 2023-06-30 Integrated busbar assembly and battery module

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310799482.0A CN116581484A (en) 2023-06-30 2023-06-30 Integrated busbar assembly and battery module

Publications (1)

Publication Number Publication Date
CN116581484A true CN116581484A (en) 2023-08-11

Family

ID=87545534

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310799482.0A Pending CN116581484A (en) 2023-06-30 2023-06-30 Integrated busbar assembly and battery module

Country Status (1)

Country Link
CN (1) CN116581484A (en)

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