CN111129386A - Foam type selection method for battery module and battery module - Google Patents
Foam type selection method for battery module and battery module Download PDFInfo
- Publication number
- CN111129386A CN111129386A CN201911380352.3A CN201911380352A CN111129386A CN 111129386 A CN111129386 A CN 111129386A CN 201911380352 A CN201911380352 A CN 201911380352A CN 111129386 A CN111129386 A CN 111129386A
- Authority
- CN
- China
- Prior art keywords
- foam
- cell
- battery
- battery module
- module
- 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.)
- Granted
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
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- 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
- H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
-
- 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
- H01M10/6554—Rods or plates
-
- 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
- H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention provides a foam type selection method for a battery module and the battery module. The battery module includes that electric core and bubble are cotton, satisfy following dimensional relationship between bubble cotton, electric core and the module: y x (1-x%) ═ a; y x (z% -x%) ═ phi; wherein A is the dimension of the foam after pre-tightening, y is the thickness dimension of the foam, x% is the pre-tightening compression amount of the foam, z% is the total compression amount of the foam, and phi is the cell expansion space; according to the dimensional relation defined by the equation, technicians can efficiently design the sizes of the module, the battery core and the foam to optimize the design flow of the battery module and improve the design efficiency of the module and the reliability of products.
Description
Technical Field
The invention belongs to the technical field of new energy, and relates to a foam type selection method for a battery module and the battery module.
Background
The soft package battery is one of power batteries, and is integrated in a battery system in a battery module mode and then widely applied to the electric automobile; in the process of actual use of the soft package battery, the performance of the battery is continuously attenuated and is accompanied with volume expansion.
Research shows that a certain pretightening force needs to be applied to the soft package battery during application, and meanwhile, a certain cell expansion space needs to be reserved (a certain pretightening force is applied to the soft package battery at the initial life stage, the performance (capacity and power) of the battery is slowly attenuated in the life period, and the expansion of the battery is slowed down in the life period); in order to better exert the performance of the battery cell, the common practice in the industry is to install foam between the battery cells during module design, apply a certain pretightening force to the battery cell and reserve a certain battery cell expansion space together with the module outer frame.
At present, when the foam is selected by technical personnel in the industry, the selection is generally carried out according to some physical and chemical properties of the foam, the size of a module product and the development experience of the product; but because of the wide variety of foam and the long verification period (generally, it is only determined at the end of the battery and module life whether the foam is properly selected).
Therefore, the unscientific and unscientific type selection method of the foam greatly influences the efficiency of the design work of the battery module and the reliability of the product; in the prior art, researches on the pretightening force of the soft package battery, the cell expansion space and a foam type selection method are few, and a scientific foam type selection method is introduced in unpublished documents or patents.
CN110336098A discloses a battery module with heating film, including heating film system assembly and electric core module, heating film system assembly includes PI heating film body, keeps apart the bubble cotton and bottom sprag bubble cotton, PI heating film body includes PI membrane and resistance wire, the last fretwork hole of having seted up of PI membrane, the fretwork hole is separated into the PI membrane at least two modules and is laid the district, adjacent module is laid and is connected through the PI membrane of fretwork hole both sides between the district, the resistance wire cladding is laid inside the district in the module, keep apart the bubble cotton and set up respectively on the PI membrane of fretwork hole both sides, bottom sprag bubble cotton sets up in the below of PI heating film body, the heat conduction bottom surface pressure of electric core module is located the module and is laid and distinguish.
CN206742405U discloses a box-type battery module, which includes a module box, battery cells, foam and insulating plates, wherein along the thickness direction of the battery cells, a plurality of battery cells and a plurality of foam are bonded together and then clamped between the insulating plates, the insulating plates assemble the plurality of battery cells and the plurality of foam of the battery cells to form a battery module, and the battery module is mounted in the module box in an extrusion manner; each electric core contacts with the module box through the heat conducting paste in the longitudinal direction.
CN206179944U discloses a battery module, which includes a plurality of single batteries, a plurality of fixing bases and an adhesive; each fixing base comprises a plurality of base units, and each base unit is provided with a containing cavity for containing a corresponding single battery; the plurality of base units of the fixed base are arranged in a central symmetry mode to form a plurality of rows, the number of the base units in each row is the same, and the connecting line of the central shafts of the base units in two adjacent rows is in a zigzag shape; the adhesive comprises foam and a cross-linking agent, wherein the foam comprises a plurality of uniformly distributed foam holes; the foam is rectangular and comprises a pair of parallel long edges, and the cross-linking agent is positioned on two sides of the foam close to the pair of long edges; two adjacent fixing bases are fixed together through the adhesive.
CN207490073U discloses power battery module liquid cooling and heating unit, including demountable installation water-cooling board and support frame together, the water-cooling board is kept away from support frame one side and is pasted and have heat conduction silica gel pad, and the water-cooling board is close to support frame one side and is pasted and have heat preservation bubble cotton and elastic support bubble cotton.
CN208690361U discloses a battery module with an expansion slow-release structure, which comprises a rectangular frame and battery cells placed in the frame, wherein the battery cells are plate-shaped, a plurality of battery cells are arranged side by side, plate-shaped expansion flame-retardant foam is arranged between two adjacent battery cells, and the side surfaces of the battery cells are attached to the expansion flame-retardant foam; and buffer springs are arranged between the outer side surfaces of the two electric cores at the outermost side and the side part of the frame.
Although the application uses the foam in the battery module, no effective foam type selection method is mentioned, so that no scientific basis and method are provided for foam type selection during module development.
Disclosure of Invention
In view of the above problems in the prior art, an object of the present invention is to provide a method for selecting a cell module by using foam and a cell module. The foam type selection method for the battery module provided by the invention can solve the problems of pre-tightening force of the battery and expansion space of the battery core in the module, improve the design efficiency of the module and the reliability of the product, and ensure that the structure of the module is reliable in the whole life cycle.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a design method of a battery module, which comprises a battery core and foam, wherein the foam, the battery core and the module satisfy the following dimensional relationship:
y×(1-x％)＝A；
y×(z％-x％)＝φ；
wherein, A is the dimension of the foam after pre-tightening, y is the thickness dimension of the foam, x% is the pre-tightening compression amount of the foam, z% is the total compression amount of the foam, and phi is the expansion space of the cell.
According to the dimensional relation that this equation was injectd, under the certain circumstances of module width dimension, electric core thickness size, according to the required pretightning force of electric core and electric core inflation space, bubble cotton pressure curve, can confirm the specification of bubble cotton.
Similarly, technical staff can determine the thickness of the battery cell according to the required pretightening force of the battery cell and the expansion space of the battery cell, the pressure curve of the foam and the thickness of the foam under the condition that the width size of the module is fixed, and the development and design of the battery cell are guided.
Further, under the condition that the size of the battery cell is determined, and the pretightening force and the expansion space of the battery cell are determined, the size of the module can be determined according to the thickness of the foam and the pressure curve of the foam, and the development and design of the module are guided.
In a second aspect, the present invention provides, as a particularly important part of the present invention, a method for selecting cell foam for a battery module, the method comprising the steps of:
(1) measuring the pre-tightening force F of the battery cell and the expansion space phi of the battery cell;
(2) determining the foam pre-tightening compression amount x% by using the cell pre-tightening force F and the foam pressure deformation characteristic in the step (1);
(3) obtaining the dimension A of the foam after pre-tightening, and utilizing an equation: calculating the thickness dimension y of the foam, wherein the y is multiplied by (1-x%) ═ A;
(4) using the equation: and (5) y (z% -x%) -phi, calculating the total compression amount z%, and selecting the type of the foam according to the pre-tightening compression amount x% of the foam in the step (2), the thickness y of the foam in the step (3) and the total compression amount z%.
In the method provided by the invention, the battery module is preferably a soft package battery module.
In the method provided by the invention, a method for acquiring key parameters (the pretightening compression amount x%, the thickness dimension y and the total compression amount z% of the foam) related in the foam type selection process is provided; through these parameters, can be with the cotton lectotype scheme scientific quantization of bubble to the cotton lectotype flow of very big reduction bubble improves the reliability of module design efficiency and product. According to the method provided by the invention, a proper foam can be selected through the finally obtained foam pre-tightening compression amount x%, the thickness dimension y of the foam and the total compression amount z%, so that the initial pre-tightening requirement and the expansion requirement in the service life of the battery cell in the module can be met, and the reliability of the module structure is ensured.
The model selection method provided by the invention can select the materials meeting the corresponding conditions from the database according to the determined parameters under the condition that the large class of materials is determined; the method avoids the dilemma that technicians have no scientific guidance basis and need to perform a large number of experiments during the selection of the foam.
The following is a preferred technical solution of the present invention, but not a limitation to the technical solution provided by the present invention, and the technical objects and advantageous effects of the present invention can be better achieved and achieved by the following preferred technical solution.
As a preferred technical solution of the present invention, the foam includes any one or a combination of at least two of Polyurethane (PU) foam, ethylene-vinyl acetate copolymer (EVA) foam, or Chloroprene Rubber (CR) foam, and preferably polyurethane foam.
Polyurethane (PU) foam can keep enough elasticity recovery ability under the long-time compression environment, is fit for being used for among the laminate polymer battery module.
As a preferable technical scheme of the invention, the cell pretightening force F and the cell expansion space phi in the step (1) are obtained by adopting a cell pretightening expansion detection device.
As a preferable technical scheme of the invention, the pressure deformation characteristic of the foam in the step (2) is obtained by measuring the strain magnitude of the foam under different stress conditions and fitting the result into a curve or a characteristic equation for simulation.
In the present invention, Matlab engineering software can be used as the fitting method, which is a conventional technique in the art and is not described herein again.
As a preferable technical solution of the present invention, the dimension a after the foam is pre-tightened in the step (3) is a difference between the width of the battery module and the total width occupied by other components.
In the present invention, the total width occupied by the other components refers to the total length of the other components located in the battery module in the width direction of the battery module. For example, if the rectangular solid cells are arranged in the battery module while standing, that is, the face of the rectangular solid cell having the smallest area is in contact with the bottom face of the battery module, the thickness of the cells is used as the length occupied in the width direction of the battery module.
As a preferred technical solution of the present invention, the total width occupied by the other components includes the total thickness of the battery cell.
This is the case when the rectangular cells are arranged in the battery module.
As a preferred technical solution of the present invention, the total width occupied by the other components further includes the width of any one or at least two of the battery core, the thermal insulation board, the thermal conductive plate, the frame and the glue. And the width space occupied by several parts in the battery module to be tested is calculated in the total width occupied by other parts. The total width occupied by the other parts is not limited to the parts, and other similar parts needing to occupy the width space can be also calculated if the battery module comprises the other parts. Here, the glue is referred to as an adhesive glue.
As a further preferable technical scheme of the battery module foam type selection method, the method comprises the following steps:
(1) measuring the pre-tightening force F of the battery cell and the expansion space phi of the battery cell;
(2) determining the foam pre-tightening compression amount x% by using the cell pre-tightening force F and the foam pressure deformation characteristic in the step (1);
(3) obtaining the dimension A of the foam after pre-tightening, and utilizing an equation: calculating the thickness dimension y of the foam, wherein the y is multiplied by (1-x%) ═ A;
(4) using the equation: calculating the total compression amount z% of the foam, and selecting the type of the foam according to the pre-tightening compression amount x% of the foam in the step (2), the thickness y of the foam in the step (3) and the total compression amount z% of the foam;
the cell pre-tightening force F and the cell expansion space phi adopt a cell pre-tightening expansion detection device;
the pressure deformation characteristic of the foam is obtained by measuring the strain of the foam under different stress conditions and fitting the result into a curve or a characteristic equation;
the size A after the cotton pretension of bubble is the difference of the width of battery module and the total width that other spare parts account for, the total width that other spare parts account for includes the total thickness of electric core and the width of heat insulating board, heat-conducting plate, frame or glue.
In a third aspect, the invention provides a battery module, which comprises a battery core and foam, wherein the foam is selected according to the foam type selection method of the battery module in the first aspect.
The battery module obtained by adopting the method for foam-cotton type selection solves the problems of the pre-tightening force of the battery and the expansion space of the battery core in the module, improves the design efficiency of the module and the reliability of the product, and ensures the reliability of the structure of the module in the whole life cycle.
As a preferable technical scheme of the present invention, the battery module is a pouch battery module.
In a fourth aspect, the invention provides a battery module, which comprises a battery core and foam, wherein the foam and the module satisfy the following dimensional relationship:
y×(1-x％)＝A；
y×(z％-x％)＝φ；
wherein, A is the dimension of the foam after pre-tightening, y is the thickness dimension of the foam, x% is the pre-tightening compression amount of the foam, z% is the total compression amount of the foam, and phi is the expansion space of the cell.
Compared with the prior art, the invention has the following beneficial effects:
(1) the foam type selection method for the battery module provided by the invention is used as a technical type selection scheme, can guide the foam type selection of the battery module, can scientifically quantize the foam type selection scheme so as to optimize the foam type selection process, improve the design efficiency of the module and the reliability of products, and solve the problems of pre-tightening force of the battery in the module and expansion space of a battery core.
(2) The battery module adopting the foam-cotton type selection method for the battery module to perform foam-cotton type selection has more excellent electrical performance, particularly the capacity and power of the module are more slowly attenuated, and the internal resistance is more slowly increased; the module structure is more reliable and more stable, can not lead to module frame to warp because of electric core inflation and cause the inefficacy.
Drawings
Fig. 1 is a schematic structural diagram of a cell pretensioning expansion detection apparatus for determining a cell pretensioning force F and a cell expansion space phi in embodiment 1;
FIG. 2 is a front view of a battery cell testing apparatus for determining cell pre-load force F and cell expansion space φ in example 1;
the device comprises a screw, a top plate, a pressure plate, an elastic component, a displacement sensor, an upper clamping plate, a lower clamping plate, a bottom plate, a supporting rod, a buffer layer, a pressure sensor and a cell, wherein the screw is 1-screw, the top plate is 2-3-pressure plate, the elastic component is 4-displacement sensor, the displacement sensor is 6-upper clamping plate, the lower clamping plate is 7-lower clamping plate, the bottom plate is 8-bottom;
FIG. 3 is a PU foam stress-strain fit curve used to calculate x% of the foam pretension compression in example 1.
Detailed Description
In order to better illustrate the present invention and facilitate the understanding of the technical solutions of the present invention, the present invention is further described in detail below. The following examples are merely illustrative of the present invention and do not represent or limit the scope of the claims, which are defined by the claims.
The following are typical but non-limiting examples of the invention:
example 1
In this example, foam selection was performed as follows:
the present embodiment uses a VDA355 module with the module size: 355 multiplied by 151 multiplied by 108.5mm, and the cell size is as follows: 310X 102X 11 mm; module width: 151mm, all cell thicknesses: 11 × 12 ═ 132mm, sum of thicknesses of other parts (insulation board and adhesive): 9 mm.
(1) The cell pre-tightening force F and the cell expansion space phi were tested using the battery cell test apparatus shown in fig. 1 and 2. The optimum pretension force F of the cell was measured to be 30KPa and the cell expansion space phi was 5%.
The battery cell detection device sequentially comprises a screw rod 1, a pressurizing plate 3, an elastic component 4, an upper clamping plate 6, a lower clamping plate 7 and a pressure sensor 11 from top to bottom, and a displacement sensor 5 is arranged at the edge of the upper clamping plate 6; the bottom of screw rod 1 contacts with increased pressure board 3, sets up in the intermediate position of increased pressure board 3, elastic component 4 has four at least, evenly sets up between increased pressure board 3 and punch holder 6, punch holder 6 and the parallel interval setting of lower plate 7, pressure sensor 11 has four at least, evenly sets up in lower plate 7 below. The screw rod 1 is a mechanical screw rod and comprises a rotating part and a pressing part, wherein the rotating part is arranged at the top of the pressing part and is vertical to the pressing part. The elastic assembly 4 comprises six springs. The number of the displacement sensors 5 is four, the displacement sensors 5 are not in contact with the pressurizing plate 3, and the displacement sensors 5 adopt push rod type displacement sensors. The surface subsides of punch holder 6 and lower plate 7 have the polytetrafluoroethylene layer, the lower surface of punch holder 6 and the upper surface of lower plate 7 are equipped with buffer layer 10 again, buffer layer 10 is the rubber buffer layer, and the thickness of two-layer buffer layer 10 is 5 mm. The device also comprises a top plate 2 and a bottom plate 8, wherein the top plate 2 is positioned above the pressurizing plate 3, the screw rod 1 penetrates through the top plate 2, the bottom plate 8 is positioned below the lower clamping plate 7, and the pressure sensor 11 is arranged on the bottom plate 8. Supporting rods 9 are arranged between the top plate 2 and the bottom plate 8, the supporting rods 9 are vertically arranged at the edges of the top plate 2 and the bottom plate 8, and the number of the supporting rods is four. The supporting rod 9 penetrates through the upper clamping plate 6 and the lower clamping plate 7, the upper clamping plate 6 can move along the supporting rod 9, and the lower clamping plate 7 is fixed. The battery cell 12 has the following dimensions: 310X 102X 11mm, placed between the cushioning layers 10 on the upper and lower clamping plates 6 and 7.
When the battery cell detection device is used for detecting the battery cell, the strip-shaped battery cell is placed between the buffer layers of the upper clamping plate and the lower clamping plate, the position of the upper clamping plate is adjusted, the buffer layer on the upper clamping plate is contacted with the battery cell, pressure is applied to the pressurizing plate through the rotating mechanical screw rod, and then the pressure is transmitted to the upper clamping plate through the spring; and testing the battery cell, recording the readings of each displacement sensor and each pressure sensor, and obtaining the change of the pressure and the thickness of the battery cell.
(2) A stress-strain curve is fitted according to stress-strain data of the PU foam, and the curve is shown in fig. 3 (the ordinate is stress, and the abscissa is strain), and it can be determined from the curve that when the stress is 30KPa (0.03MPa), the foam pretension compression amount x% is 15%.
(3) And subtracting the sum of the thicknesses of all the battery cores and the thicknesses of other parts except the battery cores from the width of the module to obtain the dimension A (151-132-9) of the pre-tightened foam which is 10 mm. Using the equation: y x (1-x%) ═ a, and the foam thickness dimension y calculated to be 11.76 mm.
(4) Using the equation: and (5) y x (z% -x%) ═ phi, calculating the total foam compression z% (-) 71%, and selecting PU foam according to the foam pre-tightening compression x% in the step (2), the thickness y of the foam in the step (3) and the total foam compression z%.
Because there are 7 cotton bubbles in this embodiment module, therefore the thickness of each cotton bubble is: y/7 is 1.68 mm.
Finally, the specification of the foam in the module is as follows: thickness: 1.68mm, compressible amount: the compression amount of 71% corresponds to 30KPa at 15%.
According to the embodiment, the foam type selection method for the battery module provided by the invention is used as a technical type selection scheme, can guide the foam type selection of the soft package battery module, can scientifically quantize the foam type selection scheme, greatly reduces the foam type selection process, improves the design efficiency of the battery cell and the reliability of the product, and solves the problems of the pre-tightening force of the battery in the module and the expansion space of the battery cell.
The applicant states that the present invention is illustrated in detail by the above examples, but the present invention is not limited to the above detailed methods, i.e. it is not meant that the present invention must rely on the above detailed methods for its implementation. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
Claims (10)
1. A battery module foam type selection method is characterized by comprising the following steps:
(1) measuring the pre-tightening force F of the battery cell and the expansion space phi of the battery cell;
(2) determining the foam pre-tightening compression amount x% by using the cell pre-tightening force F and the foam pressure deformation characteristic in the step (1);
(3) obtaining the dimension A of the foam after pre-tightening, and utilizing an equation: calculating the thickness dimension y of the foam, wherein the y is multiplied by (1-x%) ═ A;
(4) using the equation: and (5) y x (z% -x%) -phi, calculating the total compression amount z%, and selecting the type of the foam according to the pre-tightening compression amount x% of the foam in the step (2), the thickness y of the foam in the step (3) and the total compression amount z%.
2. The method for selecting the cell module foam according to claim 1, wherein the foam comprises any one of polyurethane foam, ethylene-vinyl acetate copolymer foam or chloroprene rubber foam or a combination of at least two of the polyurethane foam, the ethylene-vinyl acetate copolymer foam and the chloroprene rubber foam.
3. The type selection method for battery module foam cotton according to claim 1 or 2, wherein the cell pretightening force F and the cell expansion space phi in the step (1) are obtained by testing with a cell pretightening expansion detection device.
4. The type selection method for battery module foam according to any one of claims 1-3, wherein the foam pressure deformation characteristic in the step (2) is obtained by measuring the strain magnitude of the foam under different stress conditions and fitting the result to a curve or a characteristic equation.
5. The type selection method for battery module foam according to any one of claims 1-4, wherein the dimension A after the foam is pre-tightened in the step (3) is the difference between the width of the battery module and the total width occupied by other parts.
6. The foam type selection method for the battery module according to claim 5, wherein the total width occupied by the other parts comprises the total thickness of the battery core.
7. The method for selecting the cell module foam according to claim 6, wherein the total width occupied by the other parts further comprises the width of any one or at least two of a heat insulation plate, a heat conduction plate, a frame or glue.
8. The method for selecting foam in a pool module according to any one of claims 1 to 7, wherein the method comprises the following steps:
(1) measuring the pre-tightening force F of the battery cell and the expansion space phi of the battery cell;
(2) determining the foam pre-tightening compression amount x% by using the cell pre-tightening force F and the foam pressure deformation characteristic in the step (1);
(3) obtaining the dimension A of the foam after pre-tightening, and utilizing an equation: calculating the thickness dimension y of the foam, wherein the y is multiplied by (1-x%) ═ A;
(4) using the equation: calculating the total compression amount z% of the foam, and selecting the type of the foam according to the pre-tightening compression amount x% of the foam in the step (2), the thickness y of the foam in the step (3) and the total compression amount z% of the foam;
the cell pretightening force F and the cell expansion space phi are obtained by testing with a cell pretightening expansion detection device;
the pressure deformation characteristic of the foam is obtained by measuring the strain of the foam under different stress conditions and fitting the result into a curve or a characteristic equation;
the size A after the foam is pre-tightened is the difference between the width of the battery module and the total width occupied by other parts, and the total width occupied by other parts comprises the width of a battery core, a heat insulation plate, a heat conduction plate, a frame or glue.
9. A battery module is characterized in that the battery module comprises a battery core and foam, and the foam is selected according to the foam type selection method of the battery module as claimed in any one of claims 1 to 8.
10. The utility model provides a battery module, is cotton including electric core and bubble, its characterized in that, satisfy following dimensional relationship between bubble cotton and the module:
y×(1-x％)＝A；
y×(z％-x％)＝φ；
wherein, A is the dimension of the foam after pre-tightening, y is the thickness dimension of the foam, x% is the pre-tightening compression amount of the foam, z% is the total compression amount of the foam, and phi is the expansion space of the cell.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911380352.3A CN111129386B (en) | 2019-12-27 | 2019-12-27 | Foam type selection method for battery module and battery module |
| PCT/CN2020/126082 WO2021129163A1 (en) | 2019-12-27 | 2020-11-03 | Battery module foam selection method and battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911380352.3A CN111129386B (en) | 2019-12-27 | 2019-12-27 | Foam type selection method for battery module and battery module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111129386A true CN111129386A (en) | 2020-05-08 |
| CN111129386B CN111129386B (en) | 2020-08-11 |
Family
ID=70504501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911380352.3A Active CN111129386B (en) | 2019-12-27 | 2019-12-27 | Foam type selection method for battery module and battery module |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111129386B (en) |
| WO (1) | WO2021129163A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112665548A (en) * | 2020-12-14 | 2021-04-16 | 天津市捷威动力工业有限公司 | Method for quantitatively determining flatness of battery core |
| CN112765790A (en) * | 2020-12-31 | 2021-05-07 | 东软睿驰汽车技术（沈阳）有限公司 | Method and device for determining rebound force of foam and computer equipment |
| CN112784466A (en) * | 2021-02-01 | 2021-05-11 | 恒大新能源汽车投资控股集团有限公司 | Method and device for determining structural parameters of battery module and electronic equipment |
| CN112784443A (en) * | 2021-03-02 | 2021-05-11 | 英业达科技有限公司 | Stress-strain curve simulation method |
| CN113013539A (en) * | 2021-02-08 | 2021-06-22 | 的卢技术有限公司 | Soft package battery large module structure design method |
| WO2021129163A1 (en) * | 2019-12-27 | 2021-07-01 | 苏州清陶新能源科技有限公司 | Battery module foam selection method and battery module |
| CN114035069A (en) * | 2021-11-03 | 2022-02-11 | 元能科技（厦门）有限公司 | Lithium battery full SOC compression modulus evaluation method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018098074A (en) * | 2016-12-14 | 2018-06-21 | 三菱自動車工業株式会社 | Battery pack |
| CN208690361U (en) * | 2018-10-25 | 2019-04-02 | 台州钱江新能源研究院有限公司 | A kind of battery modules with expansion release structures |
| CN208860509U (en) * | 2018-10-19 | 2019-05-14 | 惠州亿纬锂能股份有限公司 | A kind of expansion force test device |
| CN208860510U (en) * | 2018-10-19 | 2019-05-14 | 惠州亿纬锂能股份有限公司 | A kind of expansive force and swell increment test device |
| CN209804771U (en) * | 2019-06-28 | 2019-12-17 | 中信国安盟固利动力科技有限公司 | High energy density ratio lithium battery module |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012018036A1 (en) * | 2012-09-13 | 2014-03-13 | Daimler Ag | Battery e.g. lithium-ion-battery, for use as traction battery in e.g. hybrid vehicle, has stack of individual cells arranged in stack housing, and foamed plastic material i.e. polyurethane foam, provided between cell frames and housing |
| CN206541873U (en) * | 2017-03-21 | 2017-10-03 | 宁德时代新能源科技股份有限公司 | Battery modules |
| CN111129386B (en) * | 2019-12-27 | 2020-08-11 | 苏州清陶新能源科技有限公司 | Foam type selection method for battery module and battery module |
| CN111341954B (en) * | 2020-03-13 | 2021-01-01 | 苏州清陶新能源科技有限公司 | Soft package battery module and assembly method thereof |
-
2019
- 2019-12-27 CN CN201911380352.3A patent/CN111129386B/en active Active
-
2020
- 2020-11-03 WO PCT/CN2020/126082 patent/WO2021129163A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018098074A (en) * | 2016-12-14 | 2018-06-21 | 三菱自動車工業株式会社 | Battery pack |
| CN208860509U (en) * | 2018-10-19 | 2019-05-14 | 惠州亿纬锂能股份有限公司 | A kind of expansion force test device |
| CN208860510U (en) * | 2018-10-19 | 2019-05-14 | 惠州亿纬锂能股份有限公司 | A kind of expansive force and swell increment test device |
| CN208690361U (en) * | 2018-10-25 | 2019-04-02 | 台州钱江新能源研究院有限公司 | A kind of battery modules with expansion release structures |
| CN209804771U (en) * | 2019-06-28 | 2019-12-17 | 中信国安盟固利动力科技有限公司 | High energy density ratio lithium battery module |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021129163A1 (en) * | 2019-12-27 | 2021-07-01 | 苏州清陶新能源科技有限公司 | Battery module foam selection method and battery module |
| CN112665548A (en) * | 2020-12-14 | 2021-04-16 | 天津市捷威动力工业有限公司 | Method for quantitatively determining flatness of battery core |
| CN112665548B (en) * | 2020-12-14 | 2022-05-10 | 天津市捷威动力工业有限公司 | Method for quantitatively determining flatness of battery core |
| CN112765790A (en) * | 2020-12-31 | 2021-05-07 | 东软睿驰汽车技术（沈阳）有限公司 | Method and device for determining rebound force of foam and computer equipment |
| CN112784466A (en) * | 2021-02-01 | 2021-05-11 | 恒大新能源汽车投资控股集团有限公司 | Method and device for determining structural parameters of battery module and electronic equipment |
| CN113013539A (en) * | 2021-02-08 | 2021-06-22 | 的卢技术有限公司 | Soft package battery large module structure design method |
| CN113013539B (en) * | 2021-02-08 | 2023-09-26 | 的卢技术有限公司 | Structure design method for large module of soft package battery |
| CN112784443A (en) * | 2021-03-02 | 2021-05-11 | 英业达科技有限公司 | Stress-strain curve simulation method |
| CN112784443B (en) * | 2021-03-02 | 2022-07-05 | 英业达科技有限公司 | Stress-strain curve simulation method |
| CN114035069A (en) * | 2021-11-03 | 2022-02-11 | 元能科技（厦门）有限公司 | Lithium battery full SOC compression modulus evaluation method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111129386B (en) | 2020-08-11 |
| WO2021129163A1 (en) | 2021-07-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111129386B (en) | Foam type selection method for battery module and battery module | |
| JP5533317B2 (en) | Laminate battery pressurizer | |
| TWI653456B (en) | Battery cell formation device and probe support structure thereof | |
| CN111446510A (en) | Battery expansion force measuring device and measuring method | |
| CN103151574A (en) | Battery module heating equipment for electric vehicle | |
| CN208860509U (en) | A kind of expansion force test device | |
| CN207883842U (en) | Long-life rectangular lithium ion battery | |
| CN105842072A (en) | Integrated testing device and method for compression rigidity and bending rigidity of metal bipolar plate | |
| WO2002009216A8 (en) | Method and apparatus for measuring displacement of a fuel cell stack during assembly | |
| CN206399729U (en) | Eccentric compression member loading device | |
| CN109473744B (en) | Battery liquid cooling test device | |
| CN106053515A (en) | High-temperature thermal buckling thermal-mechanical loading experimental apparatus for porous sandwich plate | |
| CN218727867U (en) | Online quantitative testing device for gas production of soft package battery | |
| CN205985249U (en) | Batteries of electric vehicle module temperature detect structure | |
| CN206332074U (en) | Detachable electrokinetic cell module frock available for battery detecting | |
| CN212007128U (en) | High-precision cell expansion displacement testing device | |
| CN116337608A (en) | Battery expansion distribution force monitoring system and method | |
| CN102749354A (en) | Composite material structure thermal excitation system and thermal excitation method thereof | |
| CN113725505A (en) | Module expansion safety assessment method | |
| CN212723246U (en) | Battery insulation detection system | |
| CN218548690U (en) | Battery module | |
| CN218512594U (en) | Battery expansion testing device | |
| CN221102159U (en) | Battery pressurizing device and battery production system | |
| CN219455330U (en) | Be used for electric core temperature to gather board | |
| CN216928692U (en) | Battery module |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |