CN117458069A - Power battery assembly and vehicle with same - Google Patents

Power battery assembly and vehicle with same Download PDF

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Publication number
CN117458069A
CN117458069A CN202311435528.7A CN202311435528A CN117458069A CN 117458069 A CN117458069 A CN 117458069A CN 202311435528 A CN202311435528 A CN 202311435528A CN 117458069 A CN117458069 A CN 117458069A
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CN
China
Prior art keywords
cell
battery
heating
battery cell
cell stacks
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
CN202311435528.7A
Other languages
Chinese (zh)
Inventor
董淑玲
孙焕丽
张占江
曹云飞
曹海月
孙博
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
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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 CN202311435528.7A priority Critical patent/CN117458069A/en
Publication of CN117458069A publication Critical patent/CN117458069A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • 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
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
    • H01M10/6571—Resistive heaters
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Secondary Cells (AREA)

Abstract

The invention provides a power battery assembly and a vehicle with the same. The power battery assembly comprises a battery box body, wherein the battery box body is provided with a containing cavity; the battery cell stacking body is arranged in the accommodating cavity and comprises a plurality of battery cell units stacked in the thickness direction, each battery cell unit comprises a battery cell body and a heating film, the heating film coats the battery cell body along the circumferential direction of the battery cell body so that the heating film forms a blue film of the battery cell body, and a resistance wire is arranged in the heating film so as to heat the battery cell body; at least one matching structure is arranged on the heating films, so that two adjacent heating films are connected in series through the matching structure. By applying the technical scheme of the invention, the heating film coats the battery core body along the circumferential direction of the battery core body and forms the blue film of the battery core body, so that the insulation effect can be achieved, the contact area between the heating film and the battery core is increased, the heating efficiency is improved, and the problem of low heating efficiency caused by limited contact area between the heating film and the battery core in the prior art is solved.

Description

Power battery assembly and vehicle with same
Technical Field
The invention relates to the technical field of vehicle batteries, in particular to a power battery assembly and a vehicle with the same.
Background
The battery system of the new energy automobile has low working efficiency when encountering lower external environment temperature, so that the battery is required to be heated by adopting a heating film, so that the self temperature of the battery can reach the level of normal charge and discharge.
At present, the mode of heating of the battery of mainstream is the heating membrane that heating efficiency is high, and the heating membrane divide into to arrange in electric core bottom and electric core side at the current arrangement mode of battery package, and two kinds of arrangement scheme heating membrane and electric core area of contact are limited, have reduced heating membrane heating efficiency. For example, the heating film is arranged on the bottom surface of the battery cell, namely, the heating film is stuck on the upper plate of the cooling plate, and heat conduction structural adhesive is coated between the bottom of the battery cell and the heating film, so that the heating film is not in direct contact with the cooling plate, and the heating film and the cooling plate transfer heat through the heat conduction structural adhesive, so that the heating efficiency is low due to heat loss. And the small contact area between the bottom of the battery cell and the heating film also leads to low heating efficiency. For another example, the heating film is arranged on the side surface of the battery cell, and the contact area between the heating film and the battery cell is increased compared with the arrangement of the heating film on the bottom of the battery cell, but the heating film only heats one side of the battery cell. The risk of dry combustion method still can appear in electric core and electric core junction, simultaneously, because battery package space structure is limited, heating membrane junction still need connect line position, pencil and add plug-in components etc. need occupy battery package layout space, further restrict the application of heating membrane.
Aiming at the technical problem of low heating efficiency caused by limited contact area between the heating film and the battery cell, no effective solution is proposed at present.
Disclosure of Invention
The invention mainly aims to provide a power battery assembly and a vehicle with the same, so as to solve the problem of low heating efficiency caused by limited contact area between a heating film and an electric core in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided a power battery assembly comprising: the battery box body is provided with a containing cavity; the battery cell stacking body is arranged in the accommodating cavity, at least one battery cell stacking body is arranged, the battery cell stacking body comprises a plurality of battery cell units which are stacked along the thickness direction, each battery cell unit comprises a battery cell body and a heating film, the heating film coats the battery cell body along the circumferential direction of the battery cell body so that the heating film forms a blue film of the battery cell body, and a resistance wire is arranged in the heating film so as to heat the battery cell body; at least one matching structure is arranged on the heating films, so that two adjacent heating films are connected in series through the matching structure.
Further, the circumference of electric core body includes two big faces of electric core and two electric core facets, and two big faces of electric core set up relatively, and two electric core facets set up relatively, and electric core facet's width direction is the thickness direction of electric core body, and electric core big face's length direction is the length direction of electric core body, and the heating film includes first heating film and second heating film, and first heating film cladding electric core is big, and second heating film cladding electric core facet all is provided with the cooperation structure on two adjacent first heating films in the electric core stack to establish ties adjacent heating film in the same electric core stack.
Further, the plurality of cell stacks are arranged side by side to form a first set of cell stacks and a second set of cell stacks, wherein the first set of cell stacks and the second set of cell stacks are arranged in series, and at least one of the first set of cell stacks and the second set of cell stacks comprises one or more cell units.
Further, the serial path of the plurality of cell stacks is S-shaped.
Further, the first group of cell stacks and the second group of cell stacks comprise cell stacks arranged in pairs, the first ends of the second group of cell stacks and the second ends of the first group of cell stacks are located on the same side, the second ends of the second group of cell stacks and the first ends of the first group of cell stacks are located on the same side, the oppositely arranged second heating films of the two cell units located at the first ends of the first group of cell stacks are provided with matching structures, the second heating films of the two cell units located at the second ends of the first group of cell stacks are provided with matching structures, the second heating film of one cell unit adjacent to the second group of cell stacks is provided with matching structures, the second heating film of one cell unit adjacent to the second end of the first group of cell stacks is provided with matching structures, and the second heating films of the two cell units located at the second ends of the second group of cell stacks are provided with matching structures.
Further, the plurality of cell stacks are arranged in pairs along the length direction of the cell units, and in each pair of two adjacent cell stacks, the second heating films of the cell units at the middle end parts of the cell stacks at the same side are provided with matching structures so as to connect the heating films in the two adjacent cell stacks in series.
Further, in the battery case, all the heating films are connected in series.
Further, the cooperation structure includes first cooperation portion and second cooperation portion, and one of them adjacent two heating membranes is provided with first cooperation portion, and another is provided with second cooperation portion, and adjacent two heating membranes pass through first cooperation portion, second cooperation portion cooperation connection.
Further, the first mating portion is a protruding structure, the second mating portion is a groove structure, and two adjacent heating films are connected in series by inserting the protruding structure into the groove structure.
Further, two mating structures are provided on the heating film, the two mating structures being provided at a distance.
Further, two matching structures are arranged on the heating film, wherein one matching structure is a first matching part, and the other matching structure is a second matching part.
Further, the power cell assembly further includes: the cooling plate is arranged in the accommodating cavity and is arranged at the bottom of the battery cell stacking body; the water inlet pipe is connected with the battery box body, the first end of the water inlet pipe is communicated with the cooling plate, and the second end of the water inlet pipe is communicated with external liquid storage equipment through a water inlet formed in the battery box body; the water outlet pipe is connected with the battery box body, the first end of the water outlet pipe is communicated with the cooling plate, and the second end of the water outlet pipe is communicated with external liquid storage equipment through a water outlet formed in the battery box body.
According to another aspect of the present invention, there is provided a vehicle having a power cell assembly as described above.
By applying the technical scheme of the invention, the heating film coats the battery cell body along the circumferential direction of the battery cell body and forms the blue film of the battery cell body, so that the insulation effect can be achieved, the contact area between the heating film and the battery cell is increased, the heating efficiency is improved, the problem of low heating efficiency caused by limited contact area between the heating film and the battery cell in the prior art is solved, and two adjacent heating films are connected in series through the matching structure, so that the plug-in and wire harnesses inside the battery pack can be reduced, the space in the battery pack can be saved, and the safety of the battery can be improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
fig. 1 shows a schematic structural view of a first embodiment of a cell unit according to the present invention;
fig. 2 shows a schematic structural diagram of a second embodiment of a cell unit according to the present invention;
fig. 3 shows a schematic structural view of a first embodiment of a second heating film according to the present invention;
fig. 4 shows a schematic structural view of a second embodiment of a second heating film according to the present invention;
fig. 5 shows a schematic structural view of an embodiment of a first mating portion according to the present invention;
fig. 6 shows a schematic structural view of an embodiment of a second mating portion according to the present invention;
fig. 7 shows a schematic structural diagram of a third embodiment of a cell unit according to the present invention;
fig. 8 shows a schematic structural view of an embodiment of two adjacent cell units according to the present invention;
fig. 9 shows a schematic structural view of an embodiment of two adjacent cell units according to the present invention;
fig. 10 shows a schematic structural view of an embodiment of a cell stack according to the present invention;
fig. 11 shows a schematic structural view of an embodiment of a power cell assembly according to the present invention.
Wherein the above figures include the following reference numerals:
1. heating the film; 11. a first heating film; 12. a second heating film;
2. a mating structure; 21. a first mating portion; 22. a second mating portion;
3. a cell body;
4. a battery box.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
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 in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art, that in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and that identical reference numerals are used to designate identical devices, and thus descriptions thereof will be omitted.
As shown in connection with fig. 1-11, a power cell assembly is provided according to an embodiment of the present application.
Specifically, the power battery assembly comprises a battery box body 4 and an electric core stacking body, wherein the battery box body 4 is provided with a containing cavity; the battery cell stacking body is arranged in the accommodating cavity, at least one battery cell stacking body is arranged, the battery cell stacking body comprises a plurality of battery cell units stacked in the thickness direction, each battery cell unit comprises a battery cell body 3 and a heating film 1, the heating films 1 wrap the battery cell bodies 3 along the circumferential direction of the battery cell bodies 3 so that the heating films 1 form blue films of the battery cell bodies 3, and resistance wires are arranged in the heating films 1 so as to heat the battery cell bodies 3; wherein, at least one matching structure 2 is arranged on the heating films 1, so that two adjacent heating films 1 are connected in series through the matching structure 2.
By applying the technical scheme of the embodiment, the heating film 1 is used for coating the battery core body 3 along the circumferential direction of the battery core body 3 and forming a blue film of the battery core body 3, so that the insulation effect can be achieved, the contact area between the heating film 1 and the battery core is increased, the heating efficiency is improved, the problem of low heating efficiency caused by limited contact area between the heating film and the battery core in the prior art is solved, two adjacent heating films 1 are connected in series through the matching structure 2, the internal plug-in components and wiring harnesses of a battery pack can be reduced, the space in the pack is saved, and the safety of the battery is improved.
In one exemplary embodiment of the present application, the heating film 1 is bonded to the cell body 3.
In an exemplary embodiment of the present application, the heating film 1 is a PI heating film, and resistance wires are distributed inside the PI heating film, and an outer PI film of the heating film 1 may replace a cell blue film to wrap a cell.
In one exemplary embodiment of the present application, the cell body 3 is a high-rate fast-charge cell or a general cell.
In an exemplary embodiment of the application, the battery box 4 is a profile extrusion box, the frame of the box is connected with the longitudinal beam through friction stir welding and argon arc welding, no transverse longitudinal beam exists in the box, the heating films 1 in the box are guaranteed to be connected in series, and the battery cell stacking body is adhered to the bottom of the battery box 4 through heat conduction structural adhesive.
Specifically, the circumference of electric core body 3 includes two big faces of electric core and two electric core facets, and two big faces of electric core set up relatively, and two electric core facets set up relatively, and the width direction of electric core facet is the thickness direction of electric core body 3, and the length direction of big face of electric core is the length direction of electric core body 3, and heating film 1 includes first heating film 11 and second heating film 12, and first heating film 11 cladding electric core is big, and the cladding of second heating film 12 is electric core facet, all is provided with cooperation structure 2 on two adjacent first heating films 11 in the electric core stack to establish ties adjacent heating film 1 in the same electric core stack. Through setting up first heating film 11 and second heating film 12, can realize the circumference heating to electric core body 3, increase heating area, and then promote battery heating efficiency.
As shown in fig. 8, the top of the electric core body 3 is provided with a polar terminal, the bottom of the electric core body 3 is connected with the bottom of the battery box 4, in an exemplary embodiment of the application, the first heating film 11 and the second heating film 12 are integrally provided, and resistance wires capable of being heated are arranged in the first heating film 11 and the second heating film 12, so as to realize circumferential heating of the electric core body 3, increase the heating area, and the resistance wires in the first heating film 11 and the second heating film 12 are connected in series.
Preferably, the plurality of cell stacks are arranged side by side to form a first set of cell stacks and a second set of cell stacks, wherein the first set of cell stacks and the second set of cell stacks are arranged in series, and at least one of the first set of cell stacks and the second set of cell stacks comprises one or more cell units. By connecting the adjacent first group of cell stacks and the second group of cell stacks in series, the heating control of the heating film 1 in the first group of cell stacks and the second group of cell stacks can be facilitated, and further the heat preservation heating control of a plurality of cell units is realized.
Preferably, the series path of the plurality of cell stacks is S-shaped. The arrangement makes all heating films 1 in the same series circuit, is convenient for subsequent heating control, reduces the power of the whole circuit, and avoids the problem of battery loss caused by overlarge power.
Specifically, the first group of cell stacks and the second group of cell stacks each include a cell stack body arranged in pairs, the first group of cell stacks and the second group of cell stacks are alternately arranged, the first ends of the second group of cell stacks and the second ends of the first group of cell stacks are located on the same side, the second ends of the second group of cell stacks and the first ends of the first group of cell stacks are located on the same side, the oppositely arranged second heating films 12 of the two cell units located at the first ends of the first group of cell stacks are provided with matching structures 2, the second heating films 12 of the one cell unit located at the second ends of the first group of cell stacks are provided with matching structures 2, the second heating films 12 of the one cell unit located at the first ends of the second group of cell stacks are adjacent to the second ends of the first group of cell stacks are provided with matching structures 2, and the second heating films 12 of the two cell units located at the second ends of the second group of cell stacks are provided with matching structures 2.
In this embodiment, the series connection of the heating films 1 of the two cell stacks in the first group of cell stacks is achieved by providing the mating structures 2 on the oppositely disposed second heating films 12 of the two cell units located at the first end of the first group of cell stacks. By arranging the mating structure 2 on the second heating film 12 of one cell unit located at the second end of the first group of cell stacks and adjacent to the second group of cell stacks, and the mating structure 2 on the second heating film 12 of one cell unit located at the first end of the second group of cell stacks and adjacent to the second end of the first group of cell stacks, the adjacent second group of cell stacks can be connected in series with the heating film 1 in the first group of cell stacks. By providing the mating structures 2 on the second heating films 12 of the two cell units at the second end of the second set of cell stacks, the heating films 1 of the two cell stacks in the second set of cell stacks are connected in series. The embodiment can finally realize the series connection of all the heating films 1 in the battery box body 4, and the heating films 1 are in a serpentine structure after being connected in series.
It should be understood by those skilled in the art that, according to actual needs, the connection of the heating films 1 between different cell stacks may have different forms, for example, a preset number of cell stacks may be connected in series to form a plurality of series units, then the plurality of series units are connected in parallel, and the cell stacks may be connected in parallel, or the internal space of the battery case 4 may be divided into areas, where the heating films 1 of the cell units in each area are arranged in series, and the heating films 1 of different areas are arranged in parallel, so as to achieve the technical effects of heating a single cell stack or a single group of cell stacks, heating the cell units at specified positions in the battery case, and so on.
Optionally, the plurality of cell stacks are arranged in pairs along the length direction of the cell units, and in each pair of two adjacent cell stacks, the second heating films 12 of the cell units at the middle end parts of the cell stacks on the same side are all provided with the matching structures 2 so as to connect the heating films 1 in the two adjacent cell stacks in series.
Preferably, all the heating films 1 are connected in series in the battery case 4. The arrangement can be beneficial to realizing the integral heating control of the power battery assembly.
Specifically, the fitting structure 2 includes a first fitting portion 21 and a second fitting portion 22, one of the adjacent two heating films 1 is provided with the first fitting portion 21, the other is provided with the second fitting portion 22, and the adjacent two heating films 1 are connected by the first fitting portion 21, the second fitting portion 22. By arranging the first matching part 21 and the second matching part 22 respectively, the positioning can be performed quickly during assembly, and the assembly efficiency is improved.
Preferably, the first fitting portion 21 is a convex structure, and the second fitting portion 22 is a concave structure, and two adjacent heating films 1 are connected in series by inserting the convex structure into the concave structure. Set up protruding structure and groove structure and cooperate and be connected, can make the assembly more convenient.
In an exemplary embodiment of the present application, as shown in fig. 5, the first mating portion 21 is a protruding structure, the protruding structure includes 3 protruding points uniformly arranged along the circumferential direction, as shown in fig. 6, the second mating portion 22 is a groove structure, and the groove structure includes three grooves uniformly arranged along the circumferential direction, and when the first mating portion 21 is mated with the second mating portion 22, the protruding points are inserted into the corresponding grooves. In this embodiment, the bump and the groove, that is, the connection terminal of the resistance wire of the heating film 1, after the bump is inserted into the groove, the two heating films 1 are connected in series, and meanwhile, the outer wall of the groove has the function of protecting the internal connection structure.
Preferably, two mating structures 2 are provided on the heating film 1, the two mating structures 2 being arranged at a distance. As shown in fig. 1 and 2, the provision of two mating structures 2 may make the connection between two adjacent heating films 1 more stable.
Preferably, two mating structures 2 are provided on the heating film 1, wherein one mating structure 2 is a first mating portion 21 and the other mating structure 2 is a second mating portion 22. This arrangement makes the connection between the heating films 1 stronger, as shown in fig. 1 and 2.
Further, the power battery assembly further comprises a cooling plate, a water inlet pipe and a water outlet pipe, wherein the cooling plate is arranged in the accommodating cavity, and the cooling plate is arranged at the bottom of the electric core stacking body; the water inlet pipe is connected with the battery box body 4, the first end of the water inlet pipe is communicated with the cooling plate, and the second end of the water inlet pipe is communicated with external liquid storage equipment through a water inlet formed in the battery box body 4; the water outlet pipe is connected with the battery box body 4, the first end of the water outlet pipe is communicated with the cooling plate, and the second end of the water outlet pipe is communicated with external liquid storage equipment through a water outlet arranged on the battery box body 4.
In one exemplary embodiment of the present application, the cooling plate is a stamped braze cooling plate that is connected to the cell unit by a thermally conductive structural adhesive.
In an exemplary embodiment of the present application, the inlet tube is connected with the battery box 4 through a welding manner, the inlet tube adopts a quick-connect connector form, 1 inlet tube is arranged in the power battery assembly altogether, and the inlet tube is communicated with the left frame and the adjacent cross beam of the battery box 4.
In an exemplary embodiment of the present application, the water outlet pipe is connected with the battery box 4 by a welding manner, the water outlet pipe adopts a quick-plug connector form, and 1 water outlet pipe is arranged in the power battery assembly.
According to another embodiment of the present application, there is provided a vehicle having a power battery assembly as in the above embodiment.
Preferably, the vehicle can be new energy vehicles such as pure electric vehicles and hybrid electric vehicles, and through adopting the power battery assembly in the embodiment, the running capacity and the endurance mileage of the vehicle can be improved, so that the efficient running of the electric vehicles is ensured, and meanwhile, the power battery assembly with better heating effect also enables the vehicle to be more suitable for the temperature environment with high altitude, large temperature difference and extremely cold, and the practicability of the vehicle is improved.
The application also provides a preferred embodiment of the power battery assembly, mainly relating to a heating film 1 adhered to the surface of a battery cell body 3 for increasing the heating area; the heating films 1 are connected through terminals, no plug-in components and wiring harnesses are added in the battery pack, so that the space structure can occupy the smallest space structure to achieve the highest heating efficiency, and the problem that the battery cannot be used in the high-altitude, large-temperature-difference and extremely cold temperature environment is solved.
Specifically, the heating film 1 is a PI heating film, resistance wires are distributed in the PI heating film, and an outer PI film replaces a cell blue film to play an insulating role; the heating films 1 are connected in series through terminals (namely the matching structure 2 comprises a groove structure and a convex structure); the battery core body 3 can be a high-rate quick-charging core or a common battery core, and is adhered to the bottom of the battery box body through heat conduction structural adhesive; the cooling plate can be a stamping brazing cooling plate, and is connected with the battery core body 3 through heat conduction structural adhesive; the battery box body 4 is a profile extrusion box body, the frame of the box body is connected with the longitudinal beam through friction stir welding and argon arc welding, and no transverse longitudinal beam exists in the box body, so that the heating films 1 can be connected in series; the water inlet pipe is connected with the box body in a welding way, the water inlet pipe adopts a quick-connect connector mode, 1 water inlet pipe is shared, and the water inlet pipe is communicated with the left frame and the cross beam of the battery box body 4; the water outlet pipe is connected with the box body in a welding mode, adopts a quick-connect connector mode, and has 1 water outlet pipe in total.
In the technical scheme of the embodiment, the heating film 1 is adhered on the surface of the battery cell instead of the blue film on the surface of the battery cell, the contact area between the heating film 1 and the battery cell body 3 is more than 95%, and the heating efficiency is improved while the heating film can replace the blue film on the surface of the battery cell, so that the problem of battery pack cost is also solved; the heating films 1 are connected by concave-convex terminals, and the heating films 1 are connected in series in the battery pack. Adopt the terminal to connect, there is not wiring harness and add parts such as plug-in components, there is little newly-increased spare part in the battery package, do not increase battery package weight and cost, solve the limited difficult problem of arranging the heating film in battery package space, promote battery package space utilization, the effectual heating film arrangement can ensure to obtain the highest heating efficiency when taking minimum battery package space, can prolong power battery's life, improve electric automobile's operational ability and range, thereby ensure the efficient operation of electric automobile.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative 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 in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition to the foregoing, references in the specification to "one embodiment," "another embodiment," "an embodiment," etc., mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described in general terms in the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is intended that such feature, structure, or characteristic be implemented within the scope of the invention.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (13)

1. A power cell assembly, comprising:
a battery box body (4), wherein the battery box body (4) is provided with a containing cavity;
the battery cell stacking body is arranged in the accommodating cavity, at least one battery cell stacking body is arranged, the battery cell stacking body comprises a plurality of battery cell units stacked in the thickness direction, each battery cell unit comprises a battery cell body (3) and a heating film (1), the heating films (1) wrap the battery cell bodies (3) along the circumferential direction of the battery cell bodies (3), so that the heating films (1) form a blue film of the battery cell bodies (3), and resistance wires are arranged in the heating films (1) to heat the battery cell bodies (3);
at least one matching structure (2) is arranged on the heating films (1), so that two adjacent heating films (1) are connected in series through the matching structures (2).
2. The power battery assembly according to claim 1, wherein the periphery of the battery cell body (3) comprises two large battery cell surfaces and two small battery cell surfaces, the two large battery cell surfaces are oppositely arranged, the two small battery cell surfaces are oppositely arranged, the width direction of the small battery cell surface is the thickness direction of the battery cell body (3), the length direction of the large battery cell surface is the length direction of the battery cell body (3), the heating film (1) comprises a first heating film (11) and a second heating film (12), the first heating film (11) covers the large battery cell surface, the second heating film (12) covers the small battery cell surface, and the matching structures (2) are arranged on two adjacent first heating films (11) in the battery cell stack body so as to connect the adjacent heating films (1) in the same battery cell stack body in series.
3. The power cell assembly of claim 2, wherein the plurality of cell stacks are arranged side-by-side to form a first set of cell stacks and a second set of cell stacks, wherein the first set of cell stacks and the second set of cell stacks are arranged in series, at least one of the first set of cell stacks and the second set of cell stacks comprising one or more of the cell units.
4. The power cell assembly of claim 3 wherein the series path of the plurality of cell stacks is S-shaped.
5. The power cell assembly according to claim 3 or 4, wherein the first and second sets of cell stacks each comprise the cell stacks arranged in pairs, the first set of cell stacks being arranged alternately with the second set of cell stacks, the first ends of the second set of cell stacks being on the same side as the second ends of the first set of cell stacks, the second ends of the second set of cell stacks being on the same side as the first ends of the first set of cell stacks, the mating structures (2) being arranged on the oppositely arranged second heating films (12) of two of the cell units at the first ends of the first set of cell stacks, the first ends of the second set of cell stacks being arranged at the second ends of the first set of cell stacks, and the second ends of the second set of cell stacks being arranged at the second ends of the second set of cell stacks (12).
6. The power battery assembly according to claim 2, wherein a plurality of the cell stacks are arranged in pairs along the length direction of the cell units, the second heating films (12) of the cell units located at the ends of the cell stacks on the same side in each pair of two adjacent cell stacks are each provided with the fitting structure (2) so as to connect the heating films (1) in the two adjacent cell stacks in series.
7. A power cell assembly according to claim 1 or 2, characterized in that all the heating films (1) are connected in series within the cell housing (4).
8. The power battery assembly according to claim 1, characterized in that the mating structure (2) comprises a first mating portion (21) and a second mating portion (22), one of two adjacent heating films (1) is provided with the first mating portion (21), the other is provided with the second mating portion (22), and two adjacent heating films (1) are connected in a mating manner through the first mating portion (21) and the second mating portion (22).
9. The power cell assembly according to claim 8, characterized in that the first mating portion (21) is a protruding structure and the second mating portion (22) is a recessed structure, two adjacent heating films (1) being connected in series by inserting the protruding structure into the recessed structure.
10. The power cell assembly according to claim 9, characterized in that two of the mating structures (2) are provided on the heating film (1), the two mating structures (2) being arranged at a distance.
11. The power battery assembly according to claim 8 or 9, characterized in that two of the mating structures (2) are provided on the heating film (1), wherein one of the mating structures (2) is the first mating portion (21) and the other mating structure (2) is the second mating portion (22).
12. The power cell assembly of claim 1, further comprising:
the cooling plate is arranged in the accommodating cavity and is arranged at the bottom of the battery cell stacking body;
the water inlet pipe is connected with the battery box body (4), the first end of the water inlet pipe is communicated with the cooling plate, and the second end of the water inlet pipe is communicated with external liquid storage equipment through a water inlet formed in the battery box body (4);
the water outlet pipe is connected with the battery box body (4), the first end of the water outlet pipe is communicated with the cooling plate, and the second end of the water outlet pipe is communicated with the external liquid storage equipment through a water outlet formed in the battery box body (4).
13. A vehicle having a power cell assembly as claimed in any one of claims 1 to 12.
CN202311435528.7A 2023-10-31 2023-10-31 Power battery assembly and vehicle with same Pending CN117458069A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311435528.7A CN117458069A (en) 2023-10-31 2023-10-31 Power battery assembly and vehicle with same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311435528.7A CN117458069A (en) 2023-10-31 2023-10-31 Power battery assembly and vehicle with same

Publications (1)

Publication Number Publication Date
CN117458069A true CN117458069A (en) 2024-01-26

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311435528.7A Pending CN117458069A (en) 2023-10-31 2023-10-31 Power battery assembly and vehicle with same

Country Status (1)

Country Link
CN (1) CN117458069A (en)

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