WO2022011513A1 - Module de batterie et véhicule - Google Patents

Module de batterie et véhicule Download PDF

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Publication number
WO2022011513A1
WO2022011513A1 PCT/CN2020/101708 CN2020101708W WO2022011513A1 WO 2022011513 A1 WO2022011513 A1 WO 2022011513A1 CN 2020101708 W CN2020101708 W CN 2020101708W WO 2022011513 A1 WO2022011513 A1 WO 2022011513A1
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WO
WIPO (PCT)
Prior art keywords
plate
battery
cooling
end plate
battery module
Prior art date
Application number
PCT/CN2020/101708
Other languages
English (en)
Chinese (zh)
Inventor
王安
于林
占莉
Original Assignee
威睿电动汽车技术(宁波)有限公司
浙江吉利控股集团有限公司
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 威睿电动汽车技术(宁波)有限公司, 浙江吉利控股集团有限公司 filed Critical 威睿电动汽车技术(宁波)有限公司
Priority to CN202080101362.3A priority Critical patent/CN115803948A/zh
Priority to PCT/CN2020/101708 priority patent/WO2022011513A1/fr
Publication of WO2022011513A1 publication Critical patent/WO2022011513A1/fr

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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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • 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

Definitions

  • the present invention relates to the technical field of batteries, in particular to a battery module and a vehicle.
  • the battery cell In the existing battery pack technology, the battery cell is its core component.
  • the cells are placed in various ways, such as individually arranged or designed as modules, and then fixed into the battery pack.
  • the cells In order to match the space of the power battery packs of different models of vehicles, the cells need to be selected in different sizes or specifications to meet the space requirements in the packs, which in turn results in repeated development of battery pack specifications and high development costs.
  • the cell when the cell is in the range of 20°C ⁇ 40°C, its charge and discharge performance is the best, and it is also most beneficial to the life of the cell.
  • the battery generates a large amount of heat. If the heat accumulates rapidly, causing local overheating or uneven temperature, it will easily lead to the decline of battery performance, the attenuation of capacity and life, and even the occurrence of thermal runaway of the battery. Therefore, in the prior art, a liquid-cooled heat dissipation device is often used to dissipate heat.
  • the heat dissipation device needs to have a volume suitable for the size of the battery cell to have better heat dissipation efficiency, which increases the volume of the battery pack.
  • the size of the cells is compressed, which is not easy to reconcile with the concept of increasing the number of cells to improve the energy density.
  • the battery cell will expand during the cycle of charging and discharging, so a certain space needs to be reserved when the battery cell is assembled. Otherwise, the cells may be squeezed against each other due to thermal expansion, or the cells may be squeezed against the casing frame of the battery pack, which may cause damage to the cells, leakage of the conductive liquid in the cells, and the risk of the casing frame falling apart.
  • the present application aims to provide a battery module and a vehicle, which can coordinate the problems between improving the energy density of the battery cells and providing the space for the arrangement of the cooling device and the thermal expansion of the power supply core, and without the need for Repeated development of battery cells will help reduce the cost of battery modules.
  • the purpose of the present invention is to provide a battery module, comprising a cell unit and a module frame structure, and the cell unit is arranged in the module frame structure;
  • the module frame structure includes a first end plate, a second end plate, a front cover plate, a rear cover plate and at least one middle reinforcing plate, the first end plate, the front cover plate, the second end plate and the rear
  • the cover plate is enclosed to form an accommodating space
  • each of the middle reinforcing plates is connected to the first end plate and the second end plate, and the middle reinforcing plate divides the accommodating space into at least two rows the volume of the cloth;
  • One of the battery cells is correspondingly arranged in each of the cavities, and each of the battery cells includes at least two single cells arranged from the first end plate to the second end plate, and each of the battery cells
  • the tabs of all the single cells in the unit face the same direction, and the tabs of the single cells face the front cover or the rear cover.
  • the battery module further includes a cooling structure, the cooling structure is arranged in the frame structure of the module, the cooling structure includes a first cooling plate, and the first cooling plate is located in two adjacent ones of the between cell units.
  • each of the single cells further includes two bonding surfaces, the two bonding surfaces are respectively connected with the two long sides of the top surface, and the two adjacent single cells The connection is made by bonding through the bonding surface.
  • the battery module further includes a wire harness isolation unit, and the wire harness isolation unit is disposed between the battery cell unit and the front cover and/or between the battery cell and the rear cover And/or between the cell unit and the middle reinforcing plate, a flexible circuit board and a cell busbar are integrated on the wire harness isolation unit, and the flexible circuit board is connected to the positive electrode tab and the negative electrode. ear connected.
  • the positive electrode tabs and the negative electrode tabs are respectively welded to the cell busbars so that the cell cell units are fixedly connected to the wire harness isolation unit. .
  • the wire harness isolation unit is provided with a positive electrode through hole that matches the positive electrode tab, and the positive electrode through hole is used for the positive electrode tab to pass through; the wire harness isolation unit is also provided with a The negative electrode through holes are matched with the negative electrode tabs, and the negative electrode through holes are used for the negative electrode tabs to pass through.
  • an acquisition processor is also included, the acquisition processor is used to monitor the cell unit, and the cell unit and the acquisition processor are connected through the flexible circuit board.
  • the middle reinforcing plate is provided with a stepped structure, and the stepped structure is arranged at one end of the middle reinforcing plate close to the first end plate and an end close to the second end plate; the first end plate and the second end plate are provided with a snap groove, the snap groove matches the step structure, the first end plate and the middle reinforcing plate, the second end plate and the middle The reinforcing plates are all connected with the clamping groove through the stepped structure.
  • a side of the first end plate close to the middle reinforcing plate and a side of the second end plate close to the middle reinforcing plate are provided with a concave structure, and the concave structure is connected to the clamping groove.
  • the recessed structures are arranged at intervals, and the recessed structures are opposite to the battery cell units.
  • the module frame structure further includes an upper fixing plate and a lower fixing plate
  • the upper fixing plate is located on one side of the cell unit, and four sides of the upper fixing plate are respectively connected to the first end
  • the plate, the front cover, the second end plate and the rear cover are connected
  • the lower fixing plate is located on the side of the cell unit away from the upper fixing plate, and the four sides of the lower fixing plate are respectively It is connected with the first end plate, the front cover plate, the second end plate and the rear cover plate.
  • the upper fixing plate includes an upper fixing plate body and a first flange, the first flanges are located on both sides of the upper fixing plate body, and the first flange faces the direction of the lower fixing plate extending;
  • the lower fixing plate includes a lower fixing plate body and a second flange, the second flanges are located on both sides of the lower fixing plate body, and the second flange extends in the direction of the upper fixing plate .
  • reinforcing ribs are provided on the surface of the upper fixing plate and the surface of the lower fixing plate.
  • the cooling structure further includes a second cooling plate and a third cooling plate, the second cooling plate is arranged between the battery cell unit and the upper fixing plate, and the third cooling plate is arranged at the Between the battery cell unit and the lower fixing plate, the first cooling plate, the second cooling plate and the third cooling plate are communicated through a cooling liquid circulation pipe.
  • glue is applied between the cell unit and the first cooling plate, between the cell unit and the second cooling plate, and between the cell unit and the third cooling plate Treatment, glue is applied between the middle reinforcing plate and the first cooling plate and between the middle reinforcing plate and the battery cell unit.
  • the bus bar includes a battery module bus bar and a battery cell unit bus bar
  • the battery cell unit bus bar is used to connect each of the battery cell units to form a whole
  • the battery module bus bar The set of bus bars is used to connect the whole of the battery cells to the positive and negative pole seats.
  • a buffer structure is also included, and the buffer structure is disposed between two adjacent single cells.
  • Another aspect of the present invention protects a vehicle including the battery module described in the above technical solution.
  • the present invention has the following beneficial effects:
  • the present invention provides a battery module, which is specially provided with a module frame structure for the battery cell units placed on the side.
  • the cavities are arranged so that the battery cells will not be over-fitted, which is beneficial to avoid mutual extrusion caused by thermal expansion of the battery cells, and is beneficial to avoid the risk of short circuit between the battery cells.
  • the present invention provides a battery module, which does not need to repeatedly develop the size of the battery cell, and can make full use of the size of the side discharge core to match the internal space of the battery pack, which is beneficial to reduce the cost of the battery module.
  • the cooling structure arranged on the basis of the frame structure of the module can fit the battery cell unit to improve the cooling effect on the battery core unit, and provide a suitable battery cell unit.
  • the working temperature environment avoids local overheating or thermal runaway caused by the huge heat generation of the battery module; it realizes the coordination between providing space for the arrangement of cooling devices, space for thermal expansion of the power supply core and improving the energy density of the battery pack.
  • FIG. 1 is an exploded schematic diagram of a battery module provided by an embodiment of the present invention.
  • FIG. 2 is an exploded schematic diagram of another battery module provided by an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of the single cell in the embodiment of the present invention.
  • Fig. 6 is the structural representation of described module frame structure
  • Figure 7 is a top view of the first end plate/second end plate
  • Fig. 8 is the structural representation of the upper fixing plate
  • FIG. 9 is a schematic diagram of the structure of the wire harness isolation unit.
  • 10-cell unit 101-single battery, 101a-positive tab, 101b-negative tab, 101c-explosion-proof valve, 20-module frame structure, 21a-first end plate, 21b-second End plate, 211-clamping groove, 212-depressed structure, 213-first opening, 22-front cover plate, 23-rear cover plate, 24-intermediate reinforcing plate, 241-step structure, 25-upper fixing plate, 251-first flange, 252-reinforcing rib, 253-second opening, 26-lower fixing plate, 261-second flange, 30-cooling structure, 31-first cooling plate, 32-second cooling plate , 33-Third cooling plate, 40- Harness isolation unit, 41-Cell busbar, 42-Flexible circuit board, 50-Busbar, 51-Battery module busbar, 52-Cell unit busbar, 60- Acquisition processor, 70-positive and negative pole seat, 80-buffer structure.
  • this embodiment provides a battery module including a battery cell unit 10 , a module frame structure 20 and a cooling structure 30 , the battery cell unit 10 and the cooling structure 30 are both arranged in the Inside the module frame structure 20;
  • the module frame structure 20 includes a first end plate 21a, a second end plate 21b, a front cover plate 22, a rear cover plate 23 and at least one middle reinforcing plate 24.
  • the first end plate 21a, the front cover plate 22, The second end plate 21b and the rear cover plate 23 are enclosed to form an accommodating space. Both ends of the middle reinforcing plate 24 are respectively connected to the first end plate 21a and the second end plate 21b.
  • the middle reinforcing plate 24 divides the accommodating space into at least two cavities arranged in a row; that is, in the embodiment of this specification, the first end plate 21a and the second end plate 21b are disposed opposite to each other, and the The front cover plate 22 and the rear cover plate 23 are arranged opposite to each other; and preferably, the middle reinforcing plates 24 are evenly distributed in the accommodating space, and the accommodating space is evenly divided into two or two the above volume;
  • One of the cell units 10 is correspondingly disposed in each of the cavities, that is, the number of the cell units 10 is equal to the number of the cavities, and each of the cell units 10 includes at least two The single cells 101 arranged from the first end plate 21a to the second end plate 21b, the tabs of all the single cells 101 in each cell unit 10 are oriented in the same direction, and the single cells 101 are arranged in the same direction.
  • the tabs of the battery 101 face the front cover 22 or the rear cover 23 .
  • the cooling structure 30 includes a first cooling plate 31 , and the first cooling plate 31 is located between two adjacent battery cells 10 .
  • the tabs of the single cells 101 in the same cell unit 10 are oriented in the same direction, which facilitates series-parallel wiring between the single cells and reduces the difficulty and complexity of wiring. And can play the role of compact structure and space saving.
  • the cooling plate since the cell unit 10 generally has a larger size, that is, the cell unit 10 has a longer distance along the direction from the first end plate 21a to the second end plate 21b, the cooling plate also usually needs to be designed Available in larger sizes for cooling needs.
  • the length of the water-cooling plate is long, a large gap is likely to exist between the middle section of the water-cooling plate and the battery module due to the influence of gravity, and the water-cooling plate cannot be closely attached to the battery module, thereby reducing the cooling effect. If the water-cooling plate is fixedly connected to the battery module by means of fasteners or welding, the circulation of the cooling liquid inside the water-cooling plate will be affected.
  • the first cooling plate 31 since the first cooling plate 31 is disposed between the two adjacent battery cells 10, the first cooling plate 31 can be sandwiched by the two adjacent battery cells and is The battery cells remain in contact, thus providing cooling for both battery cells 10 at the same time.
  • the single cell 101 includes a top surface, a bottom surface, two bonding surfaces and two adjoining surfaces, and the top surface and the bottom surface are disposed opposite to each other.
  • the top surface is a rectangle, and the top surface includes two oppositely arranged long sides and two oppositely arranged short sides; the two said bonding surfaces are arranged oppositely, and the two said bonding surfaces are The long sides of the top surface are connected; the two adjoining surfaces are arranged opposite to each other, and the two adjoining surfaces are connected with the short sides of the top surface.
  • the tabs are arranged on the top surface of the unit cell 101, and the tabs include a positive tab 101a and a negative tab 101b, and the positive tab 101a and the negative tab 101b are located along the top surface. lengthwise arrangement.
  • the two adjacent single cells 101 are attached and connected through the bonding surface, so that the single cells 101 are arranged from the first end plate 21a to the second end plate 21b, and the single cells 101 stack in the thickness direction.
  • the single battery 101 is further provided with an explosion-proof valve 101c, and the explosion-proof valve 101c is disposed between the positive electrode tab 101a and the negative electrode tab 101b.
  • the single cells in each battery unit 10 are placed laterally (as shown in FIG. 1 or 2 ), which can be adapted to a battery pack with a higher height.
  • the height of the battery pack is basically the same as the length of the single battery.
  • the method of placing the single battery on the side as provided in this application is used to make full use of the height space of the battery pack; multiple rows of battery cells are arranged in the battery pack to make full use of the length and width space of the battery pack, so that there is limited space in the battery pack. space is fully utilized.
  • a battery module provided in the embodiment of this specification further includes a wire harness isolation unit 40 , and the wire harness isolation unit 40 is disposed between the battery cell unit 10 and the front cover 22 and/or the battery cell unit 10 and the rear cover plate 23 and/or between the battery cell unit 10 and the middle reinforcing plate 24 .
  • the wire harness isolation unit 40 is integrated with a flexible printed circuit board (Flexible Printed Circuit) and a cell bus bar, and the flexible printed circuit board and the cell bus bar are respectively connected with each unit cell 101 in the adjacent cell unit.
  • the positive electrode tab 101a and the negative electrode tab 101b are connected to collect the low voltage signal of each single battery and connect the power.
  • the wire harness isolation unit 40 can play an insulating role to avoid short circuit between the single cells 101 in the battery cell unit 10 .
  • the number of the wire harness isolation units 40 is the same as the number of the battery cell units 10 . When the number of cell units 10 is greater than two, the tab of one cell unit 10 must face the middle reinforcing plate 24 , so the wire harness isolation unit 40 is disposed between the middle reinforcing plate 24 and the cell unit. between 10.
  • the wire harness isolation unit 40 is provided with a positive electrode through hole matching the positive electrode tab 101a, and the positive electrode through hole is used for the positive electrode tab to pass through.
  • the matching of the positive electrode tabs 101a means that the shape and size of the positive electrode through-holes match the shape and size of the positive electrode tabs 101a, and the number of the positive electrode through-holes is the same as that of each single cell in the cell unit 10.
  • the number of the positive electrode through holes is matched, and the positions of the positive electrode through holes on the wire harness isolation unit 40 match the positions of the positive electrode tabs 101 a relative to the battery cell unit 10 .
  • the wire harness isolation unit 40 is further provided with a negative electrode through hole matching the negative electrode tab 101b, and the negative electrode through hole is used for the negative electrode tab 101b to pass through.
  • the wire harness isolation unit 40 is further provided with an explosion-proof valve through hole, and the explosion-proof valve through hole is used for the explosion-proof valve 101c to pass through.
  • the wire harness isolation unit 40 and the battery cell unit 10 are welded and fixed to the battery core unit tabs through the battery core bus bar 41, and the battery cells are fixed after fixing.
  • the positive electrode tab 101a and the negative electrode tab 101b of each unit cell in the unit 10 extend out and are electrically connected to the flexible circuit board integrated on the wire harness isolation unit 40; the flexible circuit board is electrically connected to the tabs of each unit battery , which is conducive to reducing the number of wiring harnesses in the package and realizing a highly integrated design of large modules.
  • the side of the wire harness isolation unit 40 close to the cell unit 10 is fixed by welding the cell bus bar to the cell tabs, so that the wire harness isolation unit 40 and the cell unit are fixed. 10
  • the connection is stable, thereby ensuring the stability of the wiring line connection.
  • a battery module provided in the embodiment of this specification further includes a collection processor 60, and the collection processor 60 is connected to each of the battery cells 10 through the flexible circuit board, so that the collection processor 60 can be connected to each of the battery cells 10.
  • the collection processor 60 can be connected to each of the battery cells 10.
  • On the positive electrode tab 101a and the negative electrode tab 101b of the single battery 101 to monitor the output voltage, current, and battery temperature of each cell unit 10 and other indicators, and provide the battery management unit with information on battery efficiency and usage status , so that the battery module can be maintained, repaired or replaced in time when it is detected that the battery module is in a poor state.
  • the intermediate reinforcing plate 24 is provided with a stepped structure 241 , and the stepped structure 241 is provided at one end of the intermediate reinforcing plate 24 close to the first end plate 21 a and close to the first end plate 21 a .
  • the matching between the snap groove 211 and the stepped structure 241 means that the depth, width and length of the snap groove 211 match the three-dimensional size of the stepped structure 241 . ;
  • the number of the snap grooves 211 matches the number of the middle reinforcing plates 24; in addition, the The opening position corresponds to the position of the middle reinforcing plate 24 in the accommodating space.
  • the intermediate reinforcing plate 24 is connected to the first end plate 21a and the second end plate 21b by means of the stepped structure 24 and the clamping groove 211, the intermediate reinforcing plate 24 is also welded to the first end plate 21a and the second end plate 21b.
  • the stepped structure 24 is integrally connected with the first end plate 21a and the second end plate 21b, so that the module frame structure 20 is firmly connected.
  • the depth of the engaging groove 211 matches the stepped structure 241 , and the engaging groove 211 may be opened on the inner side of the first end plate 21 a (the inner side of the second end plate 21 b ), or it may be It is a through groove which penetrates the said 1st end plate 21a (2nd end plate 21b).
  • a side of the first end plate 21 a close to the middle reinforcing plate 24 and a side of the second end plate 21 b close to the middle reinforcing plate 24 are provided with recessed structures 212 .
  • the recessed structure 212 is spaced apart from the engaging groove 211 , and the recessed structure 212 is opposite to the battery cell unit 10 . Since the cell unit 10 may expand during the charge-discharge cycle, the recessed structure 212 can reserve a space required for thermal expansion of the cell unit 10 .
  • the module frame structure 20 further includes an upper fixing plate 25 and a lower fixing plate 26.
  • the upper fixing plate 25 is located at the On one side of the cell unit 10, the four sides of the upper fixing plate 25 are connected to the first end plate 21a, the front cover plate 22, the second end plate 21b and the rear cover plate 23.
  • the lower fixing plate 26 is located on the side of the cell unit 10 away from the upper fixing plate 25 .
  • the plate 21b is connected to the rear cover plate 23 . That is, the upper fixing plate 25 and the lower fixing plate 26 are respectively attached and connected to the two adjoining surfaces of each unit cell 101 .
  • the upper fixing plate 25 includes an upper fixing plate body and a first flange 251 , the first flanges 251 are located on both sides of the upper fixing plate body, and the first flanges 251 face the lower fixing plate 26 .
  • the first flange 251 is used to connect with the first end plate 21a and the second end plate 21b;
  • the lower fixing plate 26 includes a fixing plate body and a second flange 261, so
  • the second flanges 261 are located on both sides of the lower fixing plate body, the second flanges 261 extend toward the direction of the upper fixing plate 25, and the second flanges 261 are used for connecting with the first end
  • the plate 21a and the second end plate 21b are connected; the first flange 251 and the second flange 261 can improve the structural strength of the upper fixing plate 25 and the lower fixing plate 26 respectively, and also The connection strength of the module frame structure 20 can be improved.
  • the surface of the upper fixing plate 25 is further provided with reinforcing ribs 252 to improve the structural strength of the upper fixing plate 25 .
  • each single cell 101 faces the front cover 22 or the rear cover 23 , and the adjoining surface of each single cell 101 faces the upper
  • the fixing plate 24 or the lower fixing plate 26 each unit cell 101 faces the first end plate 21a or the second end plate 21b, and the bonding surfaces of two adjacent unit cells 101 are attached to each other.
  • the arrangement directions of the positive electrode tabs and the negative electrode tabs of the single cells 101 in the cell unit 10 are the same.
  • the positive electrode tabs of the single cells 101 101a are arranged close to the upper fixing plate 25, and the negative tabs 101b of the single cells 101 are arranged close to the lower fixing plate 26, which facilitates series-parallel cable connection after being stacked and arranged in the module frame structure.
  • the directions of the positive electrode tabs 101a and the negative electrode tabs 101b may be opposite to the above directions, and the directions of the tabs in different cell units 10 may be different.
  • the cooling structure 30 may further include a second cooling plate 32 and a third cooling plate 33 , and the second cooling plate 32 is disposed between the battery cell unit 10 and the upper fixing plate 25 , the third cooling plate 33 is disposed between the cell unit 10 and the lower fixing plate 26 . It should be noted that the size of the second cooling plate 32 and the third cooling plate 33 is large enough to be in sufficient contact with each cell unit 10 to achieve temperature adjustment of the cell unit 10 .
  • the first cooling plate 31 , the second cooling plate 32 and the third cooling plate 33 are communicated with each other through cooling liquid circulation pipes.
  • the second cooling plate 32 is disposed between the battery cell unit 10 and the upper fixing plate 25, therefore, under the action of its own gravity, the second cooling plate 32 can The adjoining surfaces of the single cells in the core unit 10 are attached to each other; the third cooling plate 33 is arranged between the battery core unit 10 and the lower fixing plate 26 , and the lower fixing plate 26 can support the first cooling plate 26 .
  • Three cooling plates 33 , and the third cooling plate 33 is attached to the other adjacent surface of the single battery in each cell unit 10 ; and the first cooling plate 31 is arranged between the adjacent cell units 10 .
  • each single cell 101 can be connected from the bottom surface to the two Each of the adjacent surfaces receives the cooling effect of the cooling structure 30 to improve the temperature management efficiency of the cell unit 10 .
  • glue is applied between the cell unit 10 and the first cooling plate 31 , and the cell unit 10 and the second cooling plate 32 are glued. Also, glue is applied between the cell unit 10 and the third cooling plate 33 . Since an intermediate reinforcing plate 24 may be disposed between the cell unit 10 and the first cooling plate 31 , at this time, between the cell unit 10 and the intermediate reinforcing plate 24 , the intermediate reinforcing plate 24 is reinforced. A glue coating process is performed between the plate 24 and the first cooling plate 31 .
  • the battery module provided in the embodiment of the present specification further includes a bus bar 50, the bus bar 50 includes a battery module bus bar 51 and a cell unit bus bar 52, and the cell unit bus bar 52 is used to connect each cell unit Connected to form a whole, the battery module bus bar 51 is used to connect the whole formed by the battery cells 10 to the positive and negative bases 70 .
  • each of the single cells 101 in the cell unit 10 realizes series-parallel connection through the flexible circuit board integrated in the wire harness isolation unit 40, and each cell unit 10 finally outputs a positive electrode and a negative electrode.
  • the battery cell unit bus bar 52 connects the battery cell units 10 to finally realize the output of the battery module as a positive electrode and a negative electrode.
  • the battery module bus bar 51 includes a battery module positive electrode bus bar and a battery module negative electrode bus bar, and the battery module positive electrode bus bar and the battery module negative electrode bus bar respectively connect the positive and negative electrodes output by the battery module. lead out, so as to realize the series-parallel connection between multiple battery modules.
  • one end of the cell unit bus bar 52 is connected to the positive electrode of the first cell unit 10, and the other end of the cell unit bus bar 52 is connected to the negative electrode of the second cell unit 10; the battery One end of the positive bus bar of the module is connected to the negative electrode of the first cell unit 10, and the other end is connected to the positive terminal of the positive and negative electrode base 70; one end of the negative bus bar of the battery module is connected to the second cell unit 10.
  • the positive pole of the battery module is connected to the positive pole of the battery module, and the other end of the negative pole busbar of the battery module is connected to the negative pole terminal of the positive and negative pole seat 70;
  • the battery cells 10 can be connected in series and parallel to each other through two or more battery cell unit bus bars 52 .
  • the positive and negative electrode holders 70 are disposed on the side of the upper fixing plate 25 close to the first end plate 21 a.
  • the positive and negative bases 70 include a support plate and a locking plate, the support plate and the locking plate are locked and connected by connecting pieces, and a positive electrode groove is provided on the support plate and a negative electrode groove, the positive electrode groove is used for connecting with the positive busbar of the battery module, and the negative electrode groove is used for connecting with the negative electrode busbar of the battery module.
  • the side of the first end plate 21a close to the upper fixing plate 25 is provided with a first opening 213, and the end of the upper fixing plate 25 close to the first end plate 21a is provided with a second opening 253, so The second opening 253 is matched with the first opening 213, and the end of the positive bus bar of the battery module that is connected to the positive electrode slot is provided with a third opening, and the connecting piece passes through the third opening in sequence.
  • the hole, the opening at the positive electrode slot, the second opening and the first opening firmly connect the battery module positive bus bar, the support plate, the upper fixing plate 25 and the first end plate 21a, and the battery module
  • One end of the set of positive bus bars is clamped between the positive groove of the support plate and the locking plate to form the positive terminal of the positive and negative base 70 .
  • a fourth opening is formed at one end of the negative electrode busbar of the battery module connected to the negative electrode slot, and the connecting piece passes through the fourth opening, the opening at the negative electrode slot, the second opening 253 and the first opening in sequence.
  • the opening 213 firmly connects the negative bus bar of the battery module, the supporting plate, the upper fixing plate 25 and the first end plate 21a, and one end of the negative bus bar of the battery module is clamped in the positive groove of the supporting plate and the lock.
  • the negative terminals of the positive and negative bases 70 are formed between the tight plates.
  • the positive and negative bases 70 are stably connected to the module frame structure 20 , and a series-parallel connection between a plurality of battery modules can be achieved through the respective positive and negative bases 70 .
  • connection method adopted by the positive and negative electrode holders 70 and the relative positional relationship with the module frame structure are only exemplary, and the positive and negative electrode holders 70 may also adopt other
  • set the positive and negative pole seat 70 on the end of the upper fixing plate 25 close to the second end plate 21b, or set the positive and negative pole socket 70 on the first end plate 21a is away from the side of the intermediate reinforcing plate 24 and so on.
  • connection structures are used to realize the Assembly of battery modules.
  • the battery module further includes a buffer structure 80 , the buffer structure 80 is disposed between two adjacent single cells 101 , and the buffer structure 80 is used for the battery cell unit. 10.
  • the thermal expansion generated during the charge-discharge cycle acts as a buffer to avoid battery damage caused by the extrusion of each single battery in the thermal expansion process, which is beneficial to improve battery service life.
  • the buffer structure 80 may be arranged at intervals from the unit cells 101 ; it may also be arranged as shown in FIG. 1 , each two unit cells 101 form a pair, and the buffer structure 80 is located between the pair of unit cells. between.
  • each buffer structure 80 in FIG. 1 is shown protruding from the single battery 101.
  • the buffer structure 80 is flush with the adjoining surface of each unit cell 101 .
  • Embodiments of the present specification further provide a vehicle, including the battery module described in the foregoing technical method.
  • a battery module provided by the embodiments of this specification is specially provided with a module frame structure for the battery cell unit that is placed sideways (referring to the battery cell unit whose tabs are not placed upward or downward), wherein the middle reinforcing plate is provided with a module frame structure.
  • the cooling structure arranged on the basis of the frame structure of the module can provide effective cooling and cooling effect for the battery cell unit, realize the provision of space for the arrangement of the cooling device and the thermal expansion space of the power supply core, and at the same time improve the energy density of the battery pack. In addition, there is no need to repeatedly develop batteries, which is beneficial to reduce the cost of battery modules.
  • the combination of the buffer structure 80 and the recessed structure 212 is adopted to provide sufficient thermal expansion space for the cell unit 80; Provide a suitable working temperature environment for the battery module to avoid local overheating or thermal runaway caused by the huge heat generation of the battery module; thus avoiding the damage of the single battery and the leakage of the conductive liquid in the single battery caused by the thermal expansion of the single battery. Risk, and avoid the extrusion of the module frame structure caused by the thermal expansion of the battery cell unit, avoid the risk of the module frame structure falling apart, and help prolong the service life of the battery module.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Mounting, Suspending (AREA)
  • Secondary Cells (AREA)

Abstract

Module de batterie, comprenant des unités d'élément de batterie et une structure de cadre de module, les unités d'élément de batterie étant agencées dans la structure de cadre de module; la structure de cadre de module comprend une première plaque d'extrémité, une seconde plaque d'extrémité, une plaque de couverture avant, une plaque de couverture arrière et au moins une plaque de renfort intermédiaire; la première plaque d'extrémité, la plaque de recouvrement avant, la seconde plaque d'extrémité et la plaque de recouvrement arrière entourent un espace de réception; la plaque de renfort intermédiaire est reliée à la première plaque d'extrémité et à la seconde plaque d'extrémité pour diviser l'espace de réception en cavités agencées en colonnes; les unités d'élément de batterie sont disposées de manière correspondante dans les cavités; l'unité d'élément de batterie comprend au moins deux éléments disposés de la première plaque d'extrémité à la seconde plaque d'extrémité; des languettes des éléments dans chaque unité d'élément de batterie sont tournées dans la même direction; et les languettes des éléments font face à la plaque de couverture avant ou à la plaque de couverture arrière. Selon la présente demande, une structure de cadre de module est spécifiquement fournie pour des unités d'élément de batterie disposées latéralement, de telle sorte que la taille des éléments de batterie disposés latéralement peut être complètement utilisée pour correspondre à un espace à l'intérieur d'un bloc-batterie, et par conséquent, il n'est pas nécessaire de développer de manière répétée des unités d'élément de batterie, ce qui permet de réduire le coût du module de batterie.
PCT/CN2020/101708 2020-07-13 2020-07-13 Module de batterie et véhicule WO2022011513A1 (fr)

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CN202080101362.3A CN115803948A (zh) 2020-07-13 2020-07-13 一种电池模组及车辆
PCT/CN2020/101708 WO2022011513A1 (fr) 2020-07-13 2020-07-13 Module de batterie et véhicule

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CN115117540A (zh) * 2022-06-27 2022-09-27 楚能新能源股份有限公司 一种pack箱体结构
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CN115377622A (zh) * 2022-08-09 2022-11-22 合肥国轩高科动力能源有限公司 一种电芯堆极耳串联模组
CN115882155A (zh) * 2023-03-08 2023-03-31 广汽埃安新能源汽车股份有限公司 一种线束隔离板及其电池包
CN116053680A (zh) * 2023-02-14 2023-05-02 厦门海辰储能科技股份有限公司 一种电池模组及用电设备
CN116093514A (zh) * 2023-03-31 2023-05-09 乌海市君泽科技有限公司 一种锂电池组保护调节装置
CN116454468A (zh) * 2023-06-16 2023-07-18 深圳海辰储能控制技术有限公司 电池模组及储能装置

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CN114709547A (zh) * 2022-01-27 2022-07-05 浙江锋锂新能源科技有限公司 一种锂金属负极固态电池模组
CN115312983A (zh) * 2022-02-22 2022-11-08 上海奥威科技开发有限公司 一种储能模组及其储能包
CN115117540A (zh) * 2022-06-27 2022-09-27 楚能新能源股份有限公司 一种pack箱体结构
CN115117540B (zh) * 2022-06-27 2023-04-14 楚能新能源股份有限公司 一种pack箱体结构
CN115377622A (zh) * 2022-08-09 2022-11-22 合肥国轩高科动力能源有限公司 一种电芯堆极耳串联模组
CN116053680A (zh) * 2023-02-14 2023-05-02 厦门海辰储能科技股份有限公司 一种电池模组及用电设备
CN115882155A (zh) * 2023-03-08 2023-03-31 广汽埃安新能源汽车股份有限公司 一种线束隔离板及其电池包
CN115882155B (zh) * 2023-03-08 2023-05-26 广汽埃安新能源汽车股份有限公司 一种线束隔离板及其电池包
CN116093514A (zh) * 2023-03-31 2023-05-09 乌海市君泽科技有限公司 一种锂电池组保护调节装置
CN116093514B (zh) * 2023-03-31 2023-06-06 乌海市君泽科技有限公司 一种锂电池组保护调节装置
CN116454468A (zh) * 2023-06-16 2023-07-18 深圳海辰储能控制技术有限公司 电池模组及储能装置
CN116454468B (zh) * 2023-06-16 2023-09-12 深圳海辰储能控制技术有限公司 电池模组及储能装置

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