CN114843658A - Battery core, battery module, battery assembly design method and vehicle - Google Patents

Battery core, battery module, battery assembly design method and vehicle Download PDF

Info

Publication number
CN114843658A
CN114843658A CN202210565339.0A CN202210565339A CN114843658A CN 114843658 A CN114843658 A CN 114843658A CN 202210565339 A CN202210565339 A CN 202210565339A CN 114843658 A CN114843658 A CN 114843658A
Authority
CN
China
Prior art keywords
battery
battery cell
liquid cooling
fixing hole
cell fixing
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
CN202210565339.0A
Other languages
Chinese (zh)
Inventor
卢军
于长虹
李黎黎
曹云飞
南海
陈蓓娜
尹芳芳
岳振东
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.)
FAW Group Corp
Original Assignee
FAW Group Corp
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 FAW Group Corp filed Critical FAW Group Corp
Priority to CN202210565339.0A priority Critical patent/CN114843658A/en
Publication of CN114843658A publication Critical patent/CN114843658A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/615—Heating or keeping warm
    • 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
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • 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
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • 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
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
    • 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
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
    • H01M50/103—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure prismatic or rectangular
    • 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
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • 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
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • 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 battery cell, a battery module, a battery assembly design method and a vehicle, wherein a main body of the battery cell is a cuboid, and the main body comprises a first side surface and a second side surface which are arranged at intervals along the height direction of the cuboid, a third side surface and a fourth side surface which are arranged at intervals along the length direction of the cuboid, and a fifth side surface and a sixth side surface which are arranged at intervals along the width direction of the cuboid; the electric core further comprises: the battery cell positive electrode and the battery cell negative electrode are arranged on the first side surface of the main body and are respectively close to the third side surface and the fourth side surface of the main body; two fixed punch combination of electric core, the setting is in the main part and about the central plane symmetry between third side and the fourth side, and each fixed punch combination of electric core wraps at least one electric core fixed orifices that runs through the width direction of cuboid, and each electric core fixed orifices all is used for supplying the liquid cold pipe to pass to solve among the prior art because of the fixed knot of electric core constructs and the comparatively complicated problem that leads to the thermal management performance relatively poor, battery assembly to integrate the efficiency lower with hot management structure.

Description

Battery core, battery module, battery assembly design method and vehicle
Technical Field
The invention relates to the technical field of batteries, in particular to a battery core, a battery module, a battery assembly design method and a vehicle.
Background
Because the living standard of people is increasing day by day, automobiles become necessary articles for every family, however, with the increase of the number of gasoline vehicles, the pollution of pollutants such as harmful gases generated by the gasoline vehicles to the living environment of people is hard to bear, so that people must find new energy sources capable of replacing gasoline to a certain extent to relieve the environmental pressure of people.
Based on such current situation, new energy automobiles using power batteries become a new favorite for people with their obvious advantages. Firstly, compared with gasoline vehicles, the new energy vehicle using the power battery can save more cost; and secondly, because the battery does not have oxidation reaction with oxygen, no redundant waste gas is discharged in the charging and discharging process, and the pollution to the environment is effectively prevented.
In the new energy automobile industry, a power battery is an important component of the new energy automobile industry. The power battery is composed of at least one battery module, and the battery module is a structure which is formed by connecting a plurality of single battery cores in series and/or in parallel to meet the requirements of required voltage and electric quantity. At present, the shape of crust monomer electricity core is mainly square and cylindrical, in the battery block structure design and manufacturing process, square electricity core and the corresponding spare part in groups of cylindrical electricity core are inconsistent with production technology, the block structure of cylinder electricity core is comparatively stable, and anti-seismic performance is becoming mature day by day, square electricity core relies on at present mostly to extrude between electric core and the box and realizes the block structure, can produce like this at very big potential safety hazard, consequently, mechanisms such as each enterprise and colleges and universities are all still in the continuous process of exploring to the block mode of square electricity core.
The power battery is used as a core part of a new energy automobile (namely, an electric automobile), and the structural safety performance and the thermal management performance of the power battery are very important. At present, the scheme of the battery assembly adopting the square battery core is a battery assembly with a standard module or a CTP (computer to plate) configuration, the structures of the two schemes are complex, and two problems exist, namely firstly, the integration degree of the battery assembly is low due to the limitation of the height of vertical arrangement; secondly, the thermal management performance is poor, and the consistency of the temperature among a plurality of battery cores and the temperature inside the battery cores of the battery cannot be ensured.
Disclosure of Invention
The invention mainly aims to provide a battery core, a battery module, a battery assembly design method and a vehicle, and aims to solve the problems of poor heat management performance and low integration efficiency of the battery assembly caused by the fact that a fixing structure and a heat management structure of the battery core are complex in the prior art.
In order to achieve the above object, according to a first aspect of the present invention, there is provided a battery cell, a main body of the battery cell is a rectangular parallelepiped, the main body includes a first side surface and a second side surface which are arranged at intervals in a height direction of the rectangular parallelepiped, a third side surface and a fourth side surface which are arranged at intervals in a length direction of the rectangular parallelepiped, and a fifth side surface and a sixth side surface which are arranged at intervals in a width direction of the rectangular parallelepiped; the electric core further comprises: the battery cell positive electrode and the battery cell negative electrode are arranged on the first side face of the main body and are respectively close to the third side face and the fourth side face of the main body; the battery cell fixing hole groups are arranged on the main body and are symmetrically arranged about the central plane, each battery cell fixing hole group comprises at least one battery cell fixing hole which penetrates through the cuboid in the width direction, and each battery cell fixing hole is used for allowing a liquid cooling pipe to penetrate through; the central plane is positioned between the third side and the fourth side, the central plane and the third side and the fourth side are parallel to each other, and the third side and the fourth side are symmetrically arranged around the central plane.
Further, the battery cell fixing hole is a round hole.
Further, the diameter of the battery cell fixing hole ranges from 10mm to 20 mm; and/or the minimum value of the distance between the center line of the cell fixing hole and the third side face or the fourth side face is 8 mm.
Further, the battery cell includes: and the plurality of battery cell fins are fixed in the battery cell fixing holes and are arranged at intervals along the length direction of the battery cell fixing holes so as to be in contact with the liquid cooling tubes penetrating through the battery cell fixing holes.
According to a second aspect of the present invention, there is provided a battery module including: the battery cell fixing holes of the plurality of battery cells which are sequentially communicated along the preset direction jointly form a long mounting hole; wherein the predetermined direction is parallel to the width direction of the main body of the cell; the liquid cooling pipe is arranged in the installation long hole in a penetrating mode so as to dissipate heat of the plurality of battery cores.
Further, the liquid cooling pipe includes body and at least one baffle of setting inside the body to divide the body inside into a plurality of cavitys.
According to a third aspect of the present invention, there is provided a battery assembly comprising: the battery module is the battery module; the battery module comprises a lower box body and a lower box body frame which is at least partially arranged around the lower box body so as to jointly enclose a box body space for containing the battery module, wherein refrigerant circulation pipelines are respectively arranged inside the lower box body and the lower box body frame and comprise a refrigerant inflow pipeline and a refrigerant outflow pipeline; the refrigerant inflow joint and the refrigerant outflow joint are arranged on the lower box body or the frame of the lower box body and are respectively used for being connected with an inlet of a refrigerant inflow pipeline and an outlet of a refrigerant outflow pipeline; wherein, the both ends of the liquid cooling pipe among the battery module all with lower box frame fixed connection, the entry of liquid cooling pipe be used for with the exit linkage of refrigerant inflow pipeline, the export of liquid cooling pipe and the entry linkage of refrigerant outflow pipeline.
According to a fourth aspect of the present invention, there is provided a battery assembly designing method for designing the battery module, the battery assembly designing method including: determining the limit area S of the cell fixing hole according to the minimum allowable capacity CM and the process limit size GC of the cell, wherein S is CM and CC and GC is exp (A); wherein, CC is a capacity-related structural coefficient, and the value range of CC is 0.8 to 0.95; a is a weight compensation parameter, and the value range of A is-0.85 to 0; determining the aperture D of the cell fixing hole according to the limit area S of the cell fixing hole, wherein D is S/2/3; wherein GB is the process length limit size; e is a safe size coefficient, and the value range of E is 1.03 to 1.53; and performing simulation calculation on the battery assembly according to the parameters so as to perform feedback correction when the simulation result is unqualified.
Further, the thickness H of the partition plate in the liquid cooling pipe is determined according to the limit area S of the cell fixing hole, and H is S/a 0.92.
According to a fifth aspect of the present invention, there is provided a vehicle including the battery assembly described above.
By applying the technical scheme, the main body of the battery cell is a cuboid, the main body comprises a first side surface, a second side surface, a third side surface, a fourth side surface, a fifth side surface and a sixth side surface which jointly enclose the peripheral surface of the main body of the battery cell, the first side surface and the second side surface are oppositely arranged and are arranged at intervals along the height direction of the cuboid, the third side surface and the fourth side surface are oppositely arranged and are arranged at intervals along the length direction of the cuboid, and the fifth side surface and the sixth side surface are oppositely arranged and are arranged at intervals along the width direction of the cuboid; the main body of the battery cell is provided with a battery cell anode and a battery cell cathode, the battery cell anode and the battery cell cathode are both positioned on the first side face of the main body, the battery cell anode and the battery cell cathode are respectively positioned at the third side face and the fourth side face of the first side face, which are close to the main body, one end of the battery cell anode and one end of the battery cell cathode are connected with the inside of the main body of the battery cell, and the other end of the battery cell anode and the other end of the battery cell cathode extend towards the outside of the main body of the battery cell; the electric core further comprises: the two battery cell fixing hole groups are positioned on the main body and are symmetrically arranged about the central plane, each battery cell fixing hole group comprises at least one battery cell fixing hole which penetrates through the cuboid in the width direction, namely two ends of each battery cell fixing hole are respectively communicated with the fifth side surface and the sixth side surface, and each battery cell fixing hole is used for a liquid cooling pipe to pass through; the central plane is positioned between the third side and the fourth side, the central plane and the third side and the fourth side are parallel to each other, and the third side and the fourth side are symmetrically arranged around the central plane. Therefore, when a plurality of battery cores of the invention are adopted to form the battery module, the battery module can be fixed, cooled and heated only by arranging the liquid cooling pipes penetrating through the plurality of battery cores, the high integration of the battery thermal management system and the battery assembly of the power battery with the battery module is realized, the rapid cooling and rapid heating of the power battery are realized, the integral energy utilization rate of the power battery is improved, and the problems of poor thermal management performance and low integration efficiency of the battery assembly caused by the complexity of the fixing structure and the thermal management structure of the battery cores in the prior art are solved. In addition, a plurality of liquid cooling pipes wear to establish respectively about the central plane symmetry two electric core fixed orifices of two electric core fixed orifices groups in a plurality of electric core fixed orifices, reduced the inconsistency of the inside thermal behavior of electric core effectively, and realized the homogeneity of the inside atress of electric core, improved the security of electric core, guaranteed electric core life as far as possible.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a schematic structural diagram of an embodiment of a cell according to the invention;
fig. 2 shows a schematic structural diagram of a battery module having the battery cells shown in fig. 1;
fig. 3 is a schematic view illustrating a structure of a liquid-cooled tube of the battery module shown in fig. 2;
fig. 4 is a schematic view illustrating the structure of a battery assembly having the battery module shown in fig. 2;
fig. 5 is a schematic view illustrating the structure of the battery assembly shown in fig. 4 when the lower case frame is not included.
Wherein the figures include the following reference numerals:
1. a lower box body frame; 11. an outer frame body; 12. a middle cross beam; 2. a battery module; 20. an electric core; 200. a housing; 201. a battery cell fixing hole; 202. cell fins; 203. an explosion-proof valve; 204. a battery cell anode; 205. a battery cell cathode; 206. a top cover; 3. a lower box body; 4. a joint; 41. a refrigerant inflow joint; 42. a refrigerant outflow joint; 5. a liquid-cooled tube; 500. a pipe body; 501. a partition plate; 502. a cavity; 5021. the refrigerant flows into the cavity; 5022. the refrigerant flows out of the cavity.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. To facilitate an understanding of the invention, reference will now be made to the following more detailed description of the invention, taken in conjunction with the accompanying drawings. While the preferred embodiments of the present invention have been illustrated in the accompanying drawings, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
As shown in fig. 1, the invention provides an electric core, a main body of which is a cuboid, and the main body includes a first side surface and a second side surface that are arranged at intervals along a height direction of the cuboid, a third side surface and a fourth side surface that are arranged at intervals along a length direction of the cuboid, and a fifth side surface and a sixth side surface that are arranged at intervals along a width direction of the cuboid; the electric core further comprises: a cell positive electrode 204 and a cell negative electrode 205 disposed on the first side of the main body and respectively adjacent to the third side and the fourth side of the main body; the two battery cell fixing hole groups are arranged on the main body and are symmetrically arranged relative to a central plane between the third side face and the fourth side face, each battery cell fixing hole group comprises at least one battery cell fixing hole 201 which penetrates through the cuboid and is arranged in the width direction, and each battery cell fixing hole 201 is used for allowing the liquid cooling pipe 5 to penetrate through; the central plane is positioned between the third side and the fourth side, the central plane and the third side and the fourth side are parallel to each other, and the third side and the fourth side are symmetrically arranged around the central plane.
The main body of the battery cell is a cuboid, and comprises a first side face, a second side face, a third side face, a fourth side face, a fifth side face and a sixth side face which jointly enclose the peripheral surface of the main body of the battery cell, wherein the first side face and the second side face are oppositely arranged and are arranged at intervals along the height direction of the cuboid, the third side face and the fourth side face are oppositely arranged and are arranged at intervals along the length direction of the cuboid, and the fifth side face and the sixth side face are oppositely arranged and are arranged at intervals along the width direction of the cuboid; a cell anode 204 and a cell cathode 205 are arranged on a main body of the cell, the cell anode 204 and the cell cathode 205 are both located on a first side surface of the main body, the cell anode 204 and the cell cathode 205 are respectively located at positions, close to a third side surface and a fourth side surface of the main body, of the first side surface, one end of the cell anode 204 and one end of the cell cathode 205 are connected with the inside of the main body of the cell, and the other end of the cell anode 204 and the other end of the cell cathode 205 extend towards the outside of the main body of the cell; the electric core further comprises: the two battery cell fixing hole groups are positioned on the main body and are symmetrically arranged about the central plane, each battery cell fixing hole group comprises at least one battery cell fixing hole 201 which penetrates through the cuboid in the width direction, namely two ends of each battery cell fixing hole 201 are respectively communicated with the fifth side surface and the sixth side surface, and each battery cell fixing hole 201 is used for a liquid cooling pipe 5 to penetrate through; the central plane is positioned between the third side and the fourth side, the central plane and the third side and the fourth side are parallel to each other, and the third side and the fourth side are symmetrically arranged around the central plane.
Thus, when a plurality of battery cores of the invention are adopted to form the battery module, the battery module can be fixed, cooled and heated only by arranging the liquid cooling pipes 5 which penetrate through the plurality of battery cores, the high integration of the battery thermal management system and the battery assembly of the power battery with the battery module is realized, the rapid cooling and rapid heating of the power battery are realized, the integral energy utilization rate of the power battery is improved, and the problems of poor thermal management performance and low integration efficiency of the battery assembly caused by the complicated fixing structure and thermal management structure of the battery cores in the prior art are solved. In addition, a plurality of liquid cooling pipes 5 are respectively arranged in a plurality of battery cell fixing holes 201 of two battery cell fixing hole groups symmetrically arranged about the central plane in a penetrating manner, so that the inconsistency of the thermal performance inside the battery cell is effectively reduced, the uniformity of the stress inside the battery cell is realized, the safety of the battery cell is improved, and the service life of the battery cell is ensured as far as possible.
As shown in fig. 1, the three directions of the X direction, the Y direction and the Z direction are mutually perpendicular to each other two by two, the height direction of the rectangular parallelepiped is the Z direction in fig. 1, the length direction of the rectangular parallelepiped is the X direction in fig. 1, and the width direction of the rectangular parallelepiped is the Y direction in fig. 1.
Specifically, the cell refers to a single electrochemical cell having a positive electrode and a negative electrode, and is generally not used directly, but a plurality of cells are combined into a battery module for use.
The battery cell is a square battery cell and is processed by a winding process or a lamination process.
In the embodiment of the battery cell shown in fig. 1 of the present invention, each battery cell fixing hole group on the main body of the battery cell includes one battery cell fixing hole 201, that is, two battery cell fixing holes 201 are arranged on the main body of the battery cell, the two battery cell fixing holes 201 are symmetrically arranged with respect to the central plane, one battery cell fixing hole 201 is arranged near the third side, and the other battery cell fixing hole 201 is arranged near the fourth side.
In an unillustrated embodiment of the battery cell of the present invention, each of the battery cell fixing hole groups on the main body of the battery cell includes a plurality of battery cell fixing holes 201, the plurality of battery cell fixing holes 201 in one battery cell fixing hole group and the plurality of battery cell fixing holes 201 in another battery cell fixing hole group are symmetrical with respect to the central plane one by one, the plurality of battery cell fixing holes 201 in one battery cell fixing hole group are all located on one side of the central plane close to the third side surface, and the plurality of battery cell fixing holes 201 in another battery cell fixing hole group are all located on one side of the central plane close to the fourth side surface; the plurality of battery cell fixing holes 201 in each battery cell fixing hole group are sequentially arranged at intervals along the height direction of the cuboid.
In an unillustrated embodiment of the battery cell of the present invention, each of the battery cell fixing hole groups on the main body of the battery cell includes a plurality of battery cell fixing holes 201, the plurality of battery cell fixing holes 201 in one battery cell fixing hole group and the plurality of battery cell fixing holes 201 in another battery cell fixing hole group are symmetrical with respect to the central plane one by one, the plurality of battery cell fixing holes 201 in one battery cell fixing hole group are all located on one side of the central plane close to the third side surface, and the plurality of battery cell fixing holes 201 in another battery cell fixing hole group are all located on one side of the central plane close to the fourth side surface; the plurality of battery cell fixing holes 201 in each battery cell fixing hole group are sequentially arranged at intervals along the length direction of the cuboid.
In an unillustrated embodiment of the battery cell of the present invention, each of the battery cell fixing hole groups on the main body of the battery cell includes a plurality of battery cell fixing holes 201, the plurality of battery cell fixing holes 201 in one battery cell fixing hole group and the plurality of battery cell fixing holes 201 in another battery cell fixing hole group are symmetrical with respect to the central plane one by one, the plurality of battery cell fixing holes 201 in one battery cell fixing hole group are all located on one side of the central plane close to the third side surface, and the plurality of battery cell fixing holes 201 in another battery cell fixing hole group are all located on one side of the central plane close to the fourth side surface; in each battery cell fixing hole group, a part of the battery cell fixing holes 201 are sequentially arranged at intervals along the height direction of the cuboid, and the other part of the battery cell fixing holes 201 are sequentially arranged at intervals along the length direction of the cuboid.
In an unillustrated embodiment of the battery cell of the present invention, each of the battery cell fixing hole groups on the main body of the battery cell includes a plurality of battery cell fixing holes 201, the plurality of battery cell fixing holes 201 in one battery cell fixing hole group and the plurality of battery cell fixing holes 201 in another battery cell fixing hole group are symmetrical with respect to the central plane one by one, the plurality of battery cell fixing holes 201 in one battery cell fixing hole group are all located on one side of the central plane close to the third side surface, and the plurality of battery cell fixing holes 201 in another battery cell fixing hole group are all located on one side of the central plane close to the fourth side surface; the plurality of cell fixing holes 201 in each cell fixing hole group are arranged in a rectangular array, a circular array or a triangular array.
In an unillustrated embodiment of the battery cell of the present invention, each of the battery cell fixing hole groups on the main body of the battery cell includes a plurality of battery cell fixing holes 201, the plurality of battery cell fixing holes 201 in one battery cell fixing hole group and the plurality of battery cell fixing holes 201 in another battery cell fixing hole group are symmetrical with respect to the central plane one by one, the plurality of battery cell fixing holes 201 in one battery cell fixing hole group are all located on one side of the central plane close to the third side surface, and the plurality of battery cell fixing holes 201 in another battery cell fixing hole group are all located on one side of the central plane close to the fourth side surface; the plurality of battery cell fixing holes 201 in each battery cell fixing hole group are sequentially arranged at intervals along a preset direction, and the preset direction is not parallel to the length direction and the height direction of the cuboid.
In an unillustrated embodiment of the battery cell of the present invention, each of the battery cell fixing hole groups on the main body of the battery cell includes a plurality of battery cell fixing holes 201, the plurality of battery cell fixing holes 201 in one battery cell fixing hole group and the plurality of battery cell fixing holes 201 in another battery cell fixing hole group are symmetrical with respect to the central plane one by one, the plurality of battery cell fixing holes 201 in one battery cell fixing hole group are all located on one side of the central plane close to the third side surface, and the plurality of battery cell fixing holes 201 in another battery cell fixing hole group are all located on one side of the central plane close to the fourth side surface; a plurality of battery cell fixing holes 201 in each battery cell fixing hole group are arranged in an irregular state.
As shown in fig. 1, the main body of the battery cell of the present invention includes a casing, the casing is composed of a casing 200 and a top cover 206, the casing 200 includes a receiving cavity for receiving a pole group and other structures and an opening portion located above the receiving cavity, the top cover 206 covers the opening portion to close the receiving cavity in the casing 200, wherein the first side, the second side, the third side, the fourth side and the fifth side of the main body are located on the casing 200, and the sixth side of the main body is located on the top cover 206.
As shown in fig. 1, the battery cell of the present invention further includes a battery cell explosion-proof valve 203, the battery cell explosion-proof valve 203 is disposed on the first side surface of the main body, the battery cell positive electrode 204 is located on one side of the battery cell explosion-proof valve 203 close to the third side surface of the main body, and the battery cell negative electrode 205 is located on one side of the battery cell explosion-proof valve 203 close to the fourth side surface of the main body; the battery cell explosion-proof valve 203 is used for releasing pressure in time when the air pressure in the battery cell rises sharply so as to maintain the balance of the air pressure inside and outside the battery cell, avoid the explosion of the battery cell and reduce potential safety hazards.
Preferably, the battery cell fixing hole 201 is a circular hole to ensure the uniformity of the stress inside the battery cell fixed by the liquid cooling tube 5 penetrating through the battery cell fixing hole 201, and avoid the premature damage of the battery cell caused by uneven stress.
Optionally, the cell fixing holes 201 may also be triangular holes, square holes, elliptical holes, or other regular or irregular holes, but these holes have no round holes in terms of ensuring uniformity of stress inside the cell.
Further preferably, the diameter of the cell fixing hole 201 ranges from 10mm to 20 mm.
Further preferably, the minimum value of the distance between the center line of the cell fixing hole 201 and the third side surface or the fourth side surface is 8 mm.
When the cell fixing hole 201 is disposed near the third side surface, the minimum value of the distance between the center line of the cell fixing hole 201 and the third side surface is 8 mm.
When the cell fixing hole 201 is disposed near the fourth side, the minimum value of the distance between the center line of the cell fixing hole 201 and the fourth side is 8 mm.
As shown in fig. 1, the cell includes: a plurality of electric core fins 202, a plurality of electric core fins 202 are fixed in electric core fixed orifices 201 and set up along the length direction interval of electric core fixed orifices 201 to be used for with wear to establish the contact of liquid cooling pipe 5 in electric core fixed orifices 201.
Specifically, because liquid cooling pipe 5 need wear to establish in electric core fixed orifices 201, in order to realize this action of wearing to establish, need set up the internal diameter of electric core fixed orifices 201 to be greater than the external diameter of liquid cooling pipe 5, even clearance fit between electric core fixed orifices 201 and liquid cooling pipe 5.
Meanwhile, in order to ensure the heat transfer effect between the main body of the battery cell and the liquid cooling pipe 5 and improve the heat transfer efficiency, a plurality of battery cell fins 202 are arranged in the battery cell fixing hole 201, each battery cell fin 202 is set to be at least part of a circular plate body, the outer peripheral surface of each battery cell fin 202 is fixedly connected with the inner wall surface of the corresponding battery cell fixing hole 201, the inner peripheral surface of each battery cell fin 202 is contacted with the outer wall surface of the corresponding liquid cooling pipe 5, so that the heat transfer speed between the liquid cooling pipe 5 and the main body of the battery cell is improved, the friction force between the liquid cooling pipe 5 and the main body of the battery cell is enhanced, and the deformation of the battery cell caused by expansion is reduced.
As shown in fig. 2, the present invention provides a battery module including: the battery cell structure comprises a plurality of battery cells 20, wherein each battery cell 20 is the battery cell, the battery cells 20 are sequentially arranged along a preset direction, and the battery cell fixing holes 201 of the battery cells 20, which are sequentially communicated along the preset direction, jointly form a long mounting hole; wherein the predetermined direction is parallel to the width direction of the main body of the cell; and the liquid cooling pipe 5 is arranged in the installation long hole in a penetrating manner so as to radiate the heat of the plurality of battery cores 20.
Specifically, each cell fixing hole group on the main body of each cell 20 includes one cell fixing hole 201; the cell fixing holes 201 of the plurality of cells 20, which are arranged near the third side, are sequentially communicated along a predetermined direction, the cell fixing holes 201 of the plurality of cells 20, which are arranged near the fourth side, are also sequentially communicated along the predetermined direction to form two installation long holes, and a liquid cooling pipe 5 is arranged in each installation long hole in a penetrating manner; the two liquid-cooled tubes 5 are symmetrically arranged about the central plane of each cell 20.
As shown in fig. 3, the liquid-cooling pipe 5 includes a pipe body 500 and at least one partition 501 disposed inside the pipe body 500 to divide the inside of the pipe body 500 into a plurality of cavities 502, so as to increase the strength of the liquid-cooling pipe 5, improve the heat transfer capacity of the liquid-cooling pipe 5, and enhance the cooling and heating effects of the liquid-cooling pipe 5.
Wherein the ratio of the thickness of the partition plate 501 to the outer diameter of the liquid cooling pipe 5 is 0.1 to 0.5.
Preferably, the outer diameter of the liquid cooling pipe 5 ranges from 2mm to 5 mm.
Preferably, the thickness of the separator 501 ranges from 0.2mm to 2.5 mm.
In the embodiment shown in fig. 1 to 5 of the present invention, the battery cell fixing hole 201 is a circular hole, the liquid cooling tube 5 is also a circular tube matched with the circular hole, and a partition plate 501 is disposed inside a tube body 500 of the liquid cooling tube 5 to divide the inside of the tube body 500 into two cavities 502, so that the cross section of the liquid cooling tube forms a "ri" shaped structure similar to a circular edge; wherein, the first end of liquid cooling pipe 5 is provided with the refrigerant entry, and the second end of liquid cooling pipe 5 is provided with the refrigerant export, and the one end that is close to the first end of liquid cooling pipe 5 of each cavity 502 is the refrigerant entry, and the one end that is close to the second end of liquid cooling pipe 5 of each cavity 502 is the refrigerant export.
In the first embodiment of the liquid-cooling pipe 5 of the present invention, not shown, the partition 501 is not provided inside the pipe body 500 of the liquid-cooling pipe 5; the first end of the liquid cooling pipe 5 is a refrigerant inlet, and the second end of the liquid cooling pipe 5 is a refrigerant outlet.
In a second embodiment of the liquid cooling tube 5 of the present invention, which is not shown in the drawings, a plurality of partition plates 501 are disposed inside the tube body 500 of the liquid cooling tube 5, the number of the partition plates 501 is odd, the plurality of partition plates 501 are sequentially disposed at intervals along a predetermined direction to divide the inside of the tube body 500 into a plurality of cavities 502, and the number of the cavities 502 is even; wherein, the first end of liquid cooling pipe 5 is provided with the refrigerant entry, and the second end of liquid cooling pipe 5 is provided with the refrigerant export, and the one end that is close to the first end of liquid cooling pipe 5 of each cavity 502 is the refrigerant entry, and the one end that is close to the second end of liquid cooling pipe 5 of each cavity 502 is the refrigerant export.
In a third embodiment of the liquid cooling tube 5 of the present invention, which is not shown in the drawings, a plurality of partition plates 501 are disposed inside a tube body 500 of the liquid cooling tube 5, the number of the partition plates 501 is odd, the plurality of partition plates 501 are sequentially disposed at intervals along a predetermined direction to divide the inside of the tube body 500 into a plurality of cavities 502 that are sequentially communicated end to end, and the number of the cavities 502 is even; wherein, the first end of liquid cooling pipe 5 is provided with refrigerant entry and refrigerant export, and the second end of liquid cooling pipe 5 is sealed, and a plurality of cavitys 502 include that the refrigerant flows into cavity 5021, and the one end that is close to the first end of liquid cooling pipe 5 that the refrigerant flows into cavity 5021 is the refrigerant entry, and a plurality of cavitys 502 include that the refrigerant flows out cavity 5022, and the one end that is close to the first end of liquid cooling pipe 5 that the refrigerant flows out cavity 5022 is the refrigerant export.
In a fourth embodiment of the liquid cooling tube 5 of the present invention, which is not shown in the drawings, a plurality of partition plates 501 are disposed inside a tube body 500 of the liquid cooling tube 5, the number of the partition plates 501 is even, the plurality of partition plates 501 are sequentially disposed at intervals along a predetermined direction to divide the inside of the tube body 500 into a plurality of cavities 502 that are sequentially communicated end to end, and the number of the cavities 502 is odd; wherein, the first end of liquid cooling pipe 5 is provided with the refrigerant entry, and the second end of liquid cooling pipe 5 is provided with the refrigerant export, and a plurality of cavitys 502 include that the refrigerant flows into cavity 5021, and the one end that is close to the first end of liquid cooling pipe 5 that the refrigerant flows into cavity 5021 is the refrigerant entry, and a plurality of cavitys 502 include that the refrigerant flows out cavity 5022, and the one end that is close to the second end of liquid cooling pipe 5 that the refrigerant flows out cavity 5022 is the refrigerant export.
In a fifth embodiment of the liquid-cooling pipe 5 of the present invention, which is not shown in the drawings, a plurality of partition plates 501 are provided inside the pipe body 500 of the liquid-cooling pipe 5 to divide the inside of the pipe body 500 into a plurality of cavities 502; the first end of the liquid cooling pipe 5 is provided with a refrigerant inlet and a refrigerant outlet, and the second end of the liquid cooling pipe 5 is also provided with a refrigerant inlet and a refrigerant outlet; two ends of at least one cavity 502 are respectively communicated with a refrigerant inlet at the first end of the liquid cooling pipe 5 and a refrigerant outlet at the second end of the liquid cooling pipe 5; the at least two cavities 502 are connected end to form a structure comprising a refrigerant inflow cavity 5021 and a refrigerant outflow cavity 5022, the refrigerant inflow cavity 5021 is communicated with a refrigerant inlet of the first end or the second end of the liquid cooling pipe 5, and the refrigerant outflow cavity 5022 is communicated with a refrigerant outlet of the first end or the second end of the liquid cooling pipe 5.
As shown in fig. 4, the present invention provides a battery assembly including: the battery module 2, the battery module 2 is the above-mentioned battery module; the battery module comprises a lower box body 3 and a lower box body frame 1 which is at least partially arranged around the lower box body 3 so as to jointly enclose a box body space for containing the battery module 2, wherein refrigerant circulation pipelines are respectively arranged inside the lower box body 3 and the lower box body frame 1 and comprise a refrigerant inflow pipeline and a refrigerant outflow pipeline; the refrigerant inflow joint 41 and the refrigerant outflow joint 42 are arranged on the lower box body 3 or the lower box body frame 1 and are respectively used for being connected with an inlet of a refrigerant inflow pipeline and an outlet of a refrigerant outflow pipeline; wherein, the both ends of liquid cooling pipe 5 among the battery module 2 all with 1 fixed connection of lower box frame, the entry of liquid cooling pipe 5 be used for with the exit linkage of refrigerant inflow pipeline, the exit linkage of liquid cooling pipe 5 and the entry linkage of refrigerant outflow pipeline.
As shown in fig. 4, the lower case frame 1 includes an outer frame 11 and a middle beam 12, the outer frame 11 is disposed around the lower case 3, the middle beam 12 is disposed above the lower case 3 and located in the middle of the lower case 3 to divide the case space enclosed between the outer frame 11 and the lower case 3 into two separate spaces, a plurality of battery modules 2 are sequentially disposed in each separate space at intervals along the length direction of the corresponding separate space, one end of the liquid cooling pipe 5 of each battery module 2 is fixed to the outer frame 11, and the other end of the liquid cooling pipe 5 of each battery module 2 is fixed to the middle beam 12.
Specifically, the lower case 3 of the battery assembly of the present invention is a metal thin plate for supporting the battery module 2 and sealing the bottom of the frame 1 of the lower case.
As shown in fig. 4 and 5, a portion of the refrigerant circulation pipeline is disposed inside the lower box 3, and another portion of the refrigerant circulation pipeline is disposed inside the lower box frame 1; at least two pipe joints 4 are arranged on one side of the lower box body 3, and the at least two pipe joints 4 comprise a refrigerant inflow joint 41 and a refrigerant outflow joint 42; one end of the refrigerant inflow joint 41 is connected with an inlet of the refrigerant inflow pipeline, and the other end of the refrigerant inflow joint 41 is used for being connected with an external liquid supply device; one end of the refrigerant outflow joint 42 is connected to an outlet of the refrigerant outflow pipeline, and the other end of the refrigerant outflow joint 42 is used for connecting to an external refrigerant recovery cooling pipeline.
In this way, the coolant circulation pipelines inside the lower box frame 1 and the lower box 3 and the liquid cooling pipes 5 in the plurality of battery modules 2 form coolant channels together, and are connected with the coolant inflow connector 41 and the coolant outflow connector 42 to form a closed loop together with an external liquid supply device and a coolant recovery cooling pipeline, and the coolant circulates in the closed loop to continuously cool or dissipate heat of each battery module 2.
When the first end of the liquid cooling pipe 5 is provided with a refrigerant inlet, the second end of the liquid cooling pipe 5 is provided with a refrigerant outlet, the first end of the liquid cooling pipe 5 is connected with the outer frame 11, and the second end of the liquid cooling pipe 5 is connected with the middle cross beam 12, the refrigerant inlet of the liquid cooling pipe 5 is connected with a refrigerant inflow pipeline of a refrigerant circulation pipeline in the outer frame 11, and the refrigerant outlet of the liquid cooling pipe 5 is connected with a refrigerant outflow pipeline of the refrigerant circulation pipeline in the middle cross beam 12.
When the first end of the liquid cooling pipe 5 is provided with a refrigerant inlet, the second end of the liquid cooling pipe 5 is provided with a refrigerant outlet, the first end of the liquid cooling pipe 5 is connected with the middle cross beam 12, and the second end of the liquid cooling pipe 5 is connected with the outer frame body 11, the refrigerant inlet of the liquid cooling pipe 5 is connected with a refrigerant inflow pipeline of a refrigerant circulation pipeline in the middle cross beam 12, and the refrigerant outlet of the liquid cooling pipe 5 is connected with a refrigerant outflow pipeline of the refrigerant circulation pipeline in the outer frame body 11.
When the first end of the liquid cooling pipe 5 is provided with a refrigerant inlet and a refrigerant outlet, the second end of the liquid cooling pipe 5 is sealed, the first end of the liquid cooling pipe 5 is connected with the outer frame body 11, and the second end of the liquid cooling pipe 5 is connected with the middle cross beam 12, the refrigerant inlet of the liquid cooling pipe 5 is connected with a refrigerant inflow pipeline of a refrigerant circulation pipeline in the outer frame body 11, and the refrigerant outlet of the liquid cooling pipe 5 is connected with a refrigerant outflow pipeline of the refrigerant circulation pipeline in the outer frame body 11.
When the first end of the liquid cooling pipe 5 is provided with a refrigerant inlet and a refrigerant outlet, the second end of the liquid cooling pipe 5 is closed, the first end of the liquid cooling pipe 5 is connected with the middle cross beam 12, and the second end of the liquid cooling pipe 5 is connected with the outer frame 11, the refrigerant inlet of the liquid cooling pipe 5 is connected with a refrigerant inflow pipeline of a refrigerant circulation pipeline in the middle cross beam 12, and the refrigerant outlet of the liquid cooling pipe 5 is connected with a refrigerant outflow pipeline of the refrigerant circulation pipeline in the middle cross beam 12.
When the first end of the liquid cooling pipe 5 is provided with a refrigerant inlet and a refrigerant outlet, the second end of the liquid cooling pipe 5 is also provided with a refrigerant inlet and a refrigerant outlet, the first end of the liquid cooling pipe 5 is connected with the outer frame 11, and the second end of the liquid cooling pipe 5 is connected with the middle cross beam 12, the refrigerant inlet and the refrigerant outlet of the first end of the liquid cooling pipe 5 are respectively connected with a refrigerant inflow pipeline and a refrigerant outflow pipeline of a refrigerant circulation pipeline in the outer frame 11, and the refrigerant inlet and the refrigerant outlet of the second end of the liquid cooling pipe 5 are respectively connected with a refrigerant inflow pipeline and a refrigerant outflow pipeline of a refrigerant circulation pipeline in the middle cross beam 12.
When the first end of the liquid cooling pipe 5 is provided with a refrigerant inlet and a refrigerant outlet, the second end of the liquid cooling pipe 5 is also provided with a refrigerant inlet and a refrigerant outlet, the first end of the liquid cooling pipe 5 is connected with the middle cross beam 12, and the second end of the liquid cooling pipe 5 is connected with the outer frame body 11, the refrigerant inlet and the refrigerant outlet of the first end of the liquid cooling pipe 5 are respectively connected with a refrigerant inflow pipeline and a refrigerant outflow pipeline of a refrigerant circulation pipeline in the middle cross beam 12, and the refrigerant inlet and the refrigerant outlet of the second end of the liquid cooling pipe 5 are respectively connected with a refrigerant inflow pipeline and a refrigerant outflow pipeline of a refrigerant circulation pipeline in the outer frame body 11.
The invention provides a battery assembly design method, which is used for designing the battery module, and the battery assembly design method comprises the following steps: determining a limit area S of the cell fixing hole 201 according to the minimum allowable capacity CM and the process limit size GC of the cell 20, wherein S is CM CC GC exp (a); wherein, CC is a capacity-related structural coefficient, and the value range of CC is 0.8 to 0.95; a is a weight compensation parameter, and the value range of A is-0.85 to 0; determining the aperture D of the cell fixing hole 201 according to the limit area S of the cell fixing hole 201, wherein D is S/GB E2/3; wherein GB is the process length limit size; e is a safe size coefficient, and the value range of E is 1.03 to 1.53; and performing simulation calculation on the battery assembly according to the parameters so as to perform feedback correction when the simulation result is unqualified.
Specifically, when the simulation calculation is performed on the battery assembly, the CAE software is adopted to perform the simulation calculation so as to obtain the structural strength, the mode and the frequency of the battery assembly under the parameters, and the related structural design is strengthened when the simulation result is unqualified.
The battery assembly design method of the present invention further comprises: the thickness H of the partition 501 in the liquid cooling tube 5 is determined according to the limit area S of the cell fixing hole 201, where H is S/a 0.92. Meanwhile, the thickness H of the separator 501 here also needs to be added to the contents of the simulation calculation of the battery assembly described above.
In the battery assembly design method of the present invention, the minimum allowable capacity CM of the battery cell 20 refers to the minimum value of the amount of electricity that the battery cell 20 needs to store, and the unit thereof is "mAh", i.e., milliampere hours.
In the battery assembly design method of the present invention, the process limit size GC of the battery cell 20 refers to the minimum size that the battery cell 20 can be processed to while ensuring the minimum allowable capacity CM.
In the battery assembly designing method of the present invention, the process length limit dimension GB is a maximum value of a center distance at which two cell fixing holes 201 are symmetrically provided about a center plane on the main body of the cell 20.
The invention also provides a vehicle comprising the battery assembly.
The vehicle can be a pure electric vehicle, the pure electric vehicle is a vehicle driven by the motor, the power battery of the pure electric vehicle comprises the battery assembly, the power battery provides electric energy for the motor, the motor converts the electric energy of the power battery into mechanical energy, and the wheels and the working device are driven by the transmission device or directly.
The vehicle of the present invention may also be a hybrid vehicle, which means a vehicle capable of obtaining power from at least two types of vehicle-mounted stored energy: one is a consumable fuel, such as a gasoline or diesel engine; the second is a rechargeable energy/energy storage device, such as a power cell including the above-described battery assembly.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
the main body of the battery cell is a cuboid, and comprises a first side face, a second side face, a third side face, a fourth side face, a fifth side face and a sixth side face which jointly enclose the peripheral surface of the main body of the battery cell, wherein the first side face and the second side face are oppositely arranged and are arranged at intervals along the height direction of the cuboid, the third side face and the fourth side face are oppositely arranged and are arranged at intervals along the length direction of the cuboid, and the fifth side face and the sixth side face are oppositely arranged and are arranged at intervals along the width direction of the cuboid; a cell anode 204 and a cell cathode 205 are arranged on a main body of the cell, the cell anode 204 and the cell cathode 205 are both located on a first side surface of the main body, the cell anode 204 and the cell cathode 205 are respectively located at positions, close to a third side surface and a fourth side surface of the main body, of the first side surface, one end of the cell anode 204 and one end of the cell cathode 205 are connected with the inside of the main body of the cell, and the other end of the cell anode 204 and the other end of the cell cathode 205 extend towards the outside of the main body of the cell; the electric core further comprises: the two battery cell fixing hole groups are positioned on the main body and are symmetrically arranged around the central plane, each battery cell fixing hole group comprises at least one battery cell fixing hole 201 which penetrates through the cuboid in the width direction, namely two ends of each battery cell fixing hole 201 are respectively communicated with the fifth side surface and the sixth side surface, and each battery cell fixing hole 201 is used for a liquid cooling pipe 5 to penetrate through; the central plane is positioned between the third side and the fourth side, the central plane and the third side and the fourth side are parallel to each other, and the third side and the fourth side are symmetrically arranged around the central plane. Thus, when a plurality of battery cores of the invention are adopted to form the battery module, the battery module can be fixed, cooled and heated only by arranging the liquid cooling pipes 5 which penetrate through the plurality of battery cores, the high integration of the battery thermal management system and the battery assembly of the power battery with the battery module is realized, the rapid cooling and rapid heating of the power battery are realized, the integral energy utilization rate of the power battery is improved, and the problems of poor thermal management performance and low integration efficiency of the battery assembly caused by the complicated fixing structure and thermal management structure of the battery cores in the prior art are solved. In addition, a plurality of liquid cooling pipes 5 are respectively arranged in a plurality of battery cell fixing holes 201 of two battery cell fixing hole groups symmetrically arranged about the central plane in a penetrating manner, so that the inconsistency of the thermal performance inside the battery cell is effectively reduced, the uniformity of the stress inside the battery cell is realized, the safety of the battery cell is improved, and the service life of the battery cell is ensured as far as possible.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … … surface," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.
For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "provided," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited.
The above-mentioned embodiments only express several embodiments of the present invention, and the description is more specific and detailed, and the present invention uses the above-mentioned embodiments to explain the structure and method of the present invention in detail, but the present invention is not limited to the above-mentioned detailed method, but it should not be understood as the limitation of the invention patent scope, that is, it does not mean that the present invention must be implemented by the above-mentioned detailed method.
It should be noted that all other embodiments, including several variations and modifications made by those skilled in the art without making any inventive step, could be made by those skilled in the art without departing from the spirit and the scope of the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and the principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. An electric core is characterized in that the main body of the electric core is a cuboid, and the main body comprises a first side surface and a second side surface which are arranged at intervals along the height direction of the cuboid, a third side surface and a fourth side surface which are arranged at intervals along the length direction of the cuboid, and a fifth side surface and a sixth side surface which are arranged at intervals along the width direction of the cuboid; the battery cell further comprises:
a cell positive electrode (204) and a cell negative electrode (205) disposed on the first side of the body and disposed proximate to the third side and the fourth side of the body, respectively;
the two battery cell fixing hole groups are arranged on the main body and are symmetrically arranged about a central plane, each battery cell fixing hole group comprises at least one battery cell fixing hole (201) which penetrates through the cuboid in the width direction, and each battery cell fixing hole (201) is used for a liquid cooling pipe (5) to penetrate through;
wherein the central plane is located between the third side and the fourth side, the central plane and the third side and the fourth side are parallel to each other, and the third side and the fourth side are symmetrically arranged with respect to the central plane.
2. The cell of claim 1, wherein the cell fixing hole (201) is a circular hole.
3. The electrical core of claim 2,
the diameter of the battery cell fixing hole (201) ranges from 10mm to 20 mm; and/or
The minimum value of the distance between the center line of the cell fixing hole (201) and the third side face or the fourth side face is 8 mm.
4. The cell of claim 1, wherein the cell comprises:
the battery cell fin structure comprises a plurality of battery cell fins (202), wherein the battery cell fins (202) are fixed in battery cell fixing holes (201) and are arranged at intervals along the length direction of the battery cell fixing holes (201) so as to be in contact with liquid cooling pipes (5) penetrating through the battery cell fixing holes (201).
5. A battery module, comprising:
a plurality of battery cells (20), wherein each battery cell (20) is the battery cell of any one of claims 1 to 4, the battery cells (20) are arranged in sequence along a predetermined direction, and the battery cell fixing holes (201) of the battery cells (20) which are communicated in sequence along the predetermined direction jointly form a long mounting hole; wherein the predetermined direction is parallel to a width direction of a main body of the cell;
and the liquid cooling pipe (5) is arranged in the mounting long hole in a penetrating manner so as to dissipate heat of the plurality of battery cells (20).
6. The battery module according to claim 5, wherein the liquid-cooled tube (5) comprises a tube body (500) and at least one partition (501) provided inside the tube body (500) to divide the inside of the tube body (500) into a plurality of cavities (502).
7. A battery assembly, comprising:
a battery module (2), the battery module (2) being the battery module according to claim 5 or 6;
the battery module comprises a lower box body (3) and a lower box body frame (1) which is at least partially arranged around the lower box body (3) to jointly enclose a box body space for containing the battery module (2), wherein refrigerant circulation pipelines are respectively arranged inside the lower box body (3) and the lower box body frame (1), and each refrigerant circulation pipeline comprises a refrigerant inflow pipeline and a refrigerant outflow pipeline;
the refrigerant inflow joint (41) and the refrigerant outflow joint (42) are arranged on the lower box body (3) or the lower box body frame (1) and are respectively used for being connected with an inlet of the refrigerant inflow pipeline and an outlet of the refrigerant outflow pipeline;
the two ends of a liquid cooling pipe (5) in the battery module (2) are fixedly connected with the lower box body frame (1), an inlet of the liquid cooling pipe (5) is used for being connected with an outlet of the refrigerant inflow pipeline, and an outlet of the liquid cooling pipe (5) is connected with an inlet of the refrigerant outflow pipeline.
8. A battery assembly design method for designing the battery assembly of claim 7, the battery assembly design method comprising:
determining a limit area S, S ═ CM × CC × GC × exp (A) of the cell fastening hole (201) according to a minimum allowable capacity CM and a process limit size GC of the cell (20); wherein, CC is a capacity-related structural coefficient, and the value range of CC is 0.8 to 0.95; a is a weight compensation parameter, and the value range of A is-0.85 to 0;
determining the aperture D of the cell fixing hole (201) according to the limit area S of the cell fixing hole (201), wherein D is S/(GB E) 2/3; wherein GB is the process length limit size; e is a safe size coefficient, and the value range of E is 1.03 to 1.53;
and performing simulation calculation on the battery assembly according to the parameters so as to perform feedback correction when the simulation result is unqualified.
9. The battery assembly design method according to claim 8, characterized in that the thickness H of the separator (501) in the liquid cooling tube (5) is determined according to the limiting area S of the cell fixing hole (201), and H is S/A0.92.
10. A vehicle comprising the battery assembly of claim 7.
CN202210565339.0A 2022-05-23 2022-05-23 Battery core, battery module, battery assembly design method and vehicle Pending CN114843658A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210565339.0A CN114843658A (en) 2022-05-23 2022-05-23 Battery core, battery module, battery assembly design method and vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210565339.0A CN114843658A (en) 2022-05-23 2022-05-23 Battery core, battery module, battery assembly design method and vehicle

Publications (1)

Publication Number Publication Date
CN114843658A true CN114843658A (en) 2022-08-02

Family

ID=82573120

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210565339.0A Pending CN114843658A (en) 2022-05-23 2022-05-23 Battery core, battery module, battery assembly design method and vehicle

Country Status (1)

Country Link
CN (1) CN114843658A (en)

Similar Documents

Publication Publication Date Title
EP3907774B1 (en) Single cell, power battery pack, and electric vehicle
CN216872114U (en) Battery and electric equipment
CN217182265U (en) Battery and electric equipment
KR102202417B1 (en) The cartridge, Battery module including the cartridge, Battery pack
CN116802890A (en) Tubular battery pack and integrated tubular battery with thermal management and safety relief system
WO2023078187A1 (en) Battery pack, thermal management system of battery, and electric device
US20240088477A1 (en) Battery, power consumption device, and method and device for producing battery
CN112582703B (en) Novel battery cooling structure based on coupling of heat pipe and liquid cooling plate
CN102237548B (en) Assembled cell having built-in liquid cooling structure
CN219303836U (en) Secondary battery, battery module and battery pack
US20230071423A1 (en) Battery, apparatus using battery, and preparation method and preparation device of battery
CN216698599U (en) Box, battery and power consumption device
WO2023155207A1 (en) Battery, electrical device, and battery preparation method and device
CN114843658A (en) Battery core, battery module, battery assembly design method and vehicle
CN113823865A (en) Square battery shell, battery with same, battery pack and automobile
CN216213695U (en) Square battery shell, battery with same, battery pack and automobile
CN219393554U (en) Battery pack structure, battery system and vehicle
CN219610552U (en) Battery module, battery pack and vehicle
CN217334228U (en) Water-cooling structure, battery and consumer
CN218586077U (en) Side cooling module for battery
CN219497895U (en) Battery shell and battery
EP4254609A1 (en) Battery, electric device, and method and device for preparing battery
US20240039071A1 (en) Battery housing, lithium-ion secondary battery, and electric vehicle
WO2023130455A1 (en) Mounting assembly, battery, electric device, battery manufacturing method and manufacturing apparatus
CN116315243A (en) Immersion type thermal management combined cell structure

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination