CN114883658A - Rechargeable battery and rechargeable battery module - Google Patents
Rechargeable battery and rechargeable battery module Download PDFInfo
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- CN114883658A CN114883658A CN202210648679.XA CN202210648679A CN114883658A CN 114883658 A CN114883658 A CN 114883658A CN 202210648679 A CN202210648679 A CN 202210648679A CN 114883658 A CN114883658 A CN 114883658A
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- 239000007773 negative electrode material Substances 0.000 claims abstract description 30
- 239000002245 particle Substances 0.000 claims abstract description 23
- 230000001186 cumulative effect Effects 0.000 claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 238000013461 design Methods 0.000 abstract description 11
- 238000011161 development Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
-
- 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
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/258—Modular batteries; Casings provided with means for assembling
-
- 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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- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a rechargeable battery and a rechargeable battery module, which comprise a shell and a battery cell positioned in the shell, wherein the battery cell comprises a negative active material, the unit conversion coefficient gamma, the capacity Q of the battery cell, the corresponding particle size D50 negative when the cumulative volume percentage of the negative active material reaches 50%, the surface area to volume ratio S of the shell and the heat conductivity lambda of the shell satisfy the following relational expression: the (gamma. Q. D50 minus)/(S. lambda.) is not more than 0.05 and not more than 20. The invention ensures that the rechargeable battery has excellent rapid charging capability as long as the rechargeable battery is ensured to meet the specific relational expression when the rechargeable battery is designed, reduces the design difficulty of the rechargeable battery, shortens the development cycle of the rechargeable battery and is beneficial to the further popularization of the rechargeable battery.
Description
Technical Field
The present invention relates to the field of battery technologies, and in particular, to a rechargeable battery and a rechargeable battery module.
Background
Rechargeable batteries, also called secondary batteries, have the outstanding characteristics of light weight, high energy density, no pollution, no memory effect, long service life and the like, and are widely applied to the fields of mobile phones, computers, household appliances, electric tools and the like.
At present, the charging time and service life of the rechargeable battery are more and more emphasized by the terminal consumers, and are also important factors limiting the further popularization of the rechargeable battery.
In order to shorten the charging time, rechargeable batteries with a fast charging capability are developed and continuously put on the market, which brings great convenience to the end consumers.
Generally, from the technical principle, the key to determine the charging speed of the rechargeable battery is the negative electrode sheet, and the particle size distribution of the negative active material is critical in the design of the negative electrode sheet. Later research has also shown that the rate of charging of rechargeable batteries is also related to heat dissipation. Therefore, in the prior art, when designing a rechargeable battery with a fast charging capability, it often takes a lot of time to adjust each factor and perform repeated experimental verification, so that the design and development period of the rechargeable battery is long, and there may be a case that the fast charging capability of the designed rechargeable battery is always not satisfactory.
Therefore, how to rapidly design a rechargeable battery with excellent rapid charging capability is a problem to be solved.
The above information is given as background information only to aid in understanding the present disclosure, and no determination or admission is made as to whether any of the above is available as prior art against the present disclosure.
Disclosure of Invention
The invention provides a rechargeable battery and a rechargeable battery module, which are used for solving the defects in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
in a first aspect, an embodiment of the present invention provides a rechargeable battery, including a casing and a battery cell located in the casing, where the battery cell includes a negative active material, and the rechargeable battery satisfies the following relationship:
the (gamma. Q. D50 minus)/(S. lambda) is more than or equal to 0.05 and less than or equal to 20;
wherein,
gamma is a unit conversion coefficient;
q is the capacity of the battery cell;
d50 is minus the corresponding particle size when the cumulative volume percentage of the negative electrode active material reaches 50 percent;
s is the ratio of the surface area to the volume of the shell;
λ is the thermal conductivity of the housing.
Further, in the rechargeable battery, the rechargeable battery satisfies the following relationship:
the (gamma. Q. D50 minus)/(S. lambda.) is not more than 0.07 but not more than 10.
Further, in the rechargeable battery, the capacity Q of the battery cell satisfies the following relation:
5Ah≤Q≤250Ah。
further, in the rechargeable battery, the particle size D50 corresponding to the cumulative volume percentage of the negative electrode active material reaching 50% negatively satisfies the following relation:
d50 with the diameter of 4 mu m or less and the negative diameter of 20 mu m or less.
Further, in the rechargeable battery, the particle size D50 corresponding to the cumulative volume percentage of the negative electrode active material reaching 50% negatively satisfies the following relation:
d50 with the diameter of 6 mu m or more and the negative diameter of 16 mu m or less.
Further, in the rechargeable battery, a surface area to volume ratio S of the case satisfies the following relationship:
50m -1 ≤S≤1000m -1 。
further, in the rechargeable battery, a surface area to volume ratio S of the case satisfies the following relation:
60m -1 ≤S≤250m -1 。
further, in the rechargeable battery, the thermal conductivity λ of the case satisfies the following relational expression:
λ≥10W/(m·K)。
further, in the rechargeable battery, the thermal conductivity λ of the case satisfies the following relational expression:
200W/(m·K)≤λ≤400W/(m·K)。
in a second aspect, an embodiment of the present invention provides a rechargeable battery module, which includes at least two rechargeable batteries, where the rechargeable batteries are the rechargeable batteries described in the first aspect.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
according to the rechargeable battery and the rechargeable battery module provided by the embodiment of the invention, by reasonably matching the relationship among the unit conversion coefficient, the capacity of the battery cell, the corresponding particle size when the cumulative volume percentage of the negative active material reaches 50%, the ratio of the surface area to the volume of the shell and the heat conductivity of the shell, when the rechargeable battery is designed, the rechargeable battery can be ensured to have excellent rapid charging capability as long as the rechargeable battery is ensured to meet a specific relational expression, the design difficulty of the rechargeable battery is reduced, the development cycle of the rechargeable battery is shortened, and the further popularization of the rechargeable battery is facilitated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a rechargeable battery (a casing and a battery cell) according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a negative electrode active material according to a first embodiment of the present invention.
Reference numerals:
the battery comprises a shell 1, a battery core 2 and a negative active material 3.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.
Furthermore, the terms "long", "short", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention, but do not indicate or imply that the referred devices or elements must have the specific orientations, be configured to operate in the specific orientations, and thus are not to be construed as limitations of the present invention.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Example one
In view of the above-mentioned drawbacks of the conventional fast rechargeable battery charging technology, the applicant of the present invention is based on practical experience and professional knowledge that are abundant over many years in the design and manufacture of such products, and actively develops and innovates in combination with the application of theory, so as to hopefully create a technology capable of solving the drawbacks of the prior art, and make the fast rechargeable battery charging technology more practical. After continuous research and design and repeated trial production and improvement, the invention with practical value is finally created.
Referring to fig. 1-2, an embodiment of the present invention provides a rechargeable battery, including a casing 1 and a battery cell 2 located in the casing 1, where the battery cell 2 includes a negative electrode plate, the negative electrode plate includes a negative electrode current collector and a negative electrode active material layer coated on at least one surface of the negative electrode current collector, the negative electrode active material layer includes a negative electrode active material 3, and the rechargeable battery satisfies the following relation:
the (gamma. Q. D50 minus)/(S. lambda) is more than or equal to 0.05 and less than or equal to 20;
wherein,
gamma is a unit conversion coefficient, and gamma is 100000000W/(m3 Ah K);
q is the capacity of the battery cell 2, and the unit is Ah;
d50 is minus the particle size in μm corresponding to the cumulative volume percentage of the negative electrode active material 3 reaching 50%;
s is the surface area to volume ratio of the housing 1 in m -1 ；
λ is the thermal conductivity of the case 1, and has the unit W/(m · K).
It should be noted that, as to how to design a rechargeable battery with excellent rapid charging capability, after research, the applicant finds that the factors influencing the rapid charging capability of the rechargeable battery are not simply one or two, but several factors, and the several factors influence each other and restrict each other, and need to reasonably match the relationship between them, so as to finally design the rechargeable battery with excellent rapid charging capability. In the present embodiment, the several factors specifically include the unit conversion coefficient γ, the capacity Q of the battery cell 2, the particle size D50 minus corresponding to 50% of the cumulative volume percentage of the negative electrode active material 3, the surface area to volume ratio S of the case 1, and the thermal conductivity λ of the case 1, and when the relationship therebetween satisfies the following relation: when the value of (gamma.Q.D 50 minus)/(S.lambda) is less than or equal to 0.05 and less than or equal to 20, the designed rechargeable battery can be ensured to have excellent rapid charging capability.
In addition, it is understood that the housing 1 further includes other components, such as a positive electrode plate, an electrolyte, a separator, a top cover, etc., besides those mentioned above, and the components specifically function to ensure that each function of the rechargeable battery works properly.
In this embodiment, the relation that the rechargeable battery needs to satisfy may be further optimized as follows:
the (gamma. Q. D50 minus)/(S. lambda.) is not more than 0.07 but not more than 10.
It is to be noted that if the rechargeable battery is said to be capable of securing excellent quick-charging ability of the rechargeable battery when the following relation, i.e., 0.05 ≦ (γ · Q · D50 minus)/(S · λ) ≦ 20, is satisfied, then the rechargeable battery is said to be capable of securing more excellent quick-charging ability when the following relation, i.e., 0.07 ≦ (γ · Q · D50 minus)/(S · λ) ≦ 10, is satisfied.
In this embodiment, the capacity Q of the battery cell 2 satisfies the following relation:
5Ah≤Q≤250Ah。
it should be noted that, in designing the rechargeable battery, the capacity Q of the battery cell 2 may be arbitrarily selected within the interval of 5Ah to 250 Ah.
In this embodiment, the particle diameter D50 corresponding to the cumulative volume percentage of the negative electrode active material 3 reaching 50% negatively satisfies the following relation:
d50 with the diameter of 4 mu m or less and the negative diameter of 20 mu m or less.
That is, in designing the rechargeable battery, the particle diameter D50 corresponding to 50% of the cumulative volume percentage of the negative electrode active material 3 may be arbitrarily selected within the range of 4 μm to 20 μm.
The range of 4-20 μm can avoid the side reaction with the electrolyte caused by too small particle size, thereby avoiding the influence on the improvement effect of the quick charging capability of the battery, and can also avoid the influence on the solid phase conduction of the lithium ions in the negative electrode active material 3 caused by too large particle size, thereby avoiding the influence on the improvement effect of the quick charging capability of the battery.
In addition, the particle size D50 of the negative electrode active material 3 is small in the interval range, which is beneficial to the transmission of lithium ions in the particles and accelerates the diffusion speed and the diffusion depth of the lithium ions in the negative electrode active material, but the small particle size and the large specific surface area consume more active lithium to form an SEI film, the SEI film ratio is increased, and the interface impedance of the battery is increased.
Preferably, the relationship that the particle diameter D50 minus needs to be satisfied when the cumulative volume percentage of the negative electrode active material 3 reaches 50% may be further optimized as follows:
d50 with the diameter of 6 mu m or more and the negative diameter of 16 mu m or less.
It should be noted that, when the cumulative volume percentage of the negative electrode active material 3 reaches 50%, the corresponding particle size D50 is selected within the interval of 6 μm to 16 μm, so as to better improve the dynamic performance of the rechargeable battery, and make the rechargeable battery have more excellent rapid charging capability.
In the present embodiment, the surface area to volume ratio S of the housing 1 satisfies the following relationship:
50m -1 ≤S≤1000m -1 。
it is noted that, that is, in designing the rechargeable battery, the surface area to volume ratio S of the case 1 may be 50m -1 -1000m -1 The range of the interval is arbitrarily selected.
The larger the surface area of the casing 1 is, the better the heat dissipation effect is, but the larger the surface area is, the lower the volumetric utilization rate is, and thus the energy density and the volumetric energy density of the battery cell 2 are lower.
Preferably, the relation that the surface area to volume ratio S of the housing 1 needs to satisfy may be further optimized as follows:
60m -1 ≤S≤250m -1 。
note that, at 60m -1 -250m -1 The surface area to volume ratio S of the housing 1 in this interval range is selected to better improve the dynamic performance of the rechargeable battery, so that the rechargeable battery has more excellent rapid charging capability.
In the present embodiment, the thermal conductivity λ of the case 1 satisfies the following relational expression:
λ≥10W/(m·K)。
in other words, the thermal conductivity λ of the case 1 can be arbitrarily selected within the range of 10W/(m · K) -infinity when designing the rechargeable battery.
Preferably, the relation that the thermal conductivity λ of the housing 1 needs to satisfy may be further optimized as follows:
200W/(m·K)≤λ≤400W/(m·K)。
it should be noted that, selecting the thermal conductivity λ of the housing 1 in the interval of 200W/(m · K) -400W/(m · K) can better improve the dynamic performance of the rechargeable battery, so that the rechargeable battery has more excellent rapid charging capability.
To demonstrate the feasibility of the present example, the present example was subjected to a dynamic performance test, and the test results of the four groups of examples and the four groups of comparative examples are shown in table 1:
table 1: test results of four groups of examples and four groups of comparative examples
Wherein U represents (γ. Q. D50 minus)/(S. lamda).
As can be seen from table 1, all four examples are within the preferred range of U, that is, all four examples have excellent fast-charging ability, and within the preferred range, the smaller the U value, the stronger the fast-charging ability. In the first comparative example, the case 1 with poor thermal conductivity λ is used, so that the heat dissipation is poor, the rapid charging temperature rise is large, and the rapid charging capability is poor; in the comparative example II, the ratio S of the surface area of the shell 1 to the volume of the shell is small, the heat dissipation is poor, and the quick charging capability is poor; in the third comparative example, the ratio S of the surface area of the shell 1 to the volume of the shell is large, the quick charging effect is good, but the volume utilization rate of the shell 1 is low, and the volume energy density and the mass energy density are low; in comparative example four, the particle diameter D50 corresponding to 50% of the cumulative volume percentage of the negative electrode active material 3 was too large, and the quick charging ability was poor.
Although the terms casing, cell, negative active material, etc. are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
According to the rechargeable battery provided by the embodiment of the invention, by reasonably matching the relationship among the unit conversion coefficient, the capacity of the battery core, the corresponding particle size when the cumulative volume percentage of the negative active materials reaches 50%, the specific value of the surface area and the volume of the shell and the heat conductivity of the shell, when the rechargeable battery is designed, the rechargeable battery can be ensured to have excellent rapid charging capability as long as the rechargeable battery is ensured to meet a specific relational expression, the design difficulty of the rechargeable battery is reduced, the development cycle of the rechargeable battery is shortened, and the further popularization of the rechargeable battery is facilitated.
Example two
An embodiment of the present invention provides a rechargeable battery module, which includes at least two rechargeable batteries, where the rechargeable batteries are the rechargeable batteries described in the first embodiment.
The rechargeable battery module in this embodiment can be applied to electronic devices, such as electronic devices, electric vehicles, or power storage systems, but not limited to. The electronic device can be, for example, various computers, mobile phones, display screens, and the like, which use the rechargeable battery module as a driving power source. The electric vehicle may be, for example, an electric vehicle, an electric tricycle, an electric bicycle, or the like, which uses a rechargeable battery module as a driving power source. The power storage system may be, for example, a power storage system using a rechargeable battery module as a power storage source.
In these electronic devices, the rechargeable battery module can be electrically connected to the electric element to provide electric energy to the electric element. Because the quick charge ability of the rechargeable battery module that this application provided is comparatively excellent, be favorable to like this that electronic equipment is arranged in application scenes such as outdoor energy storage, short-time power reserve and mobile energy storage to make electronic equipment's application scene more extensive.
According to the rechargeable battery module provided by the embodiment of the invention, by reasonably matching the relationship among the unit conversion coefficient, the capacity of the battery core, the corresponding particle size when the cumulative volume percentage of the negative active materials reaches 50%, the specific value of the surface area and the volume of the shell and the heat conductivity of the shell, when the rechargeable battery is designed, the rechargeable battery can be ensured to have excellent rapid charging capability as long as the rechargeable battery is ensured to meet a specific relational expression, the design difficulty of the rechargeable battery is reduced, the development cycle of the rechargeable battery is shortened, and the further popularization of the rechargeable battery is facilitated.
The foregoing description of the embodiments has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure. Individual elements or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, are interchangeable and can be used in a selected embodiment, even if not specifically shown or described. The same elements or features may also vary in many respects. Such variations are not to be regarded as a departure from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.
Example embodiments are provided so that this disclosure will be thorough and will fully convey the scope to those skilled in the art. Numerous details are set forth, such as examples of specific parts, devices, and methods, in order to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms and that neither should be construed to limit the scope of the disclosure. In certain example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.
The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises" and "comprising" are intended to be inclusive and therefore specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order discussed and illustrated, unless explicitly indicated as an order of performance. It should also be understood that additional or alternative steps may be employed.
When an element or layer is referred to as being "on" … … "," engaged with "… …", "connected to" or "coupled to" another element or layer, it can be directly on, engaged with, connected to or coupled to the other element or layer, or intervening elements or layers may also be present. In contrast, when an element or layer is referred to as being "directly on … …," "directly engaged with … …," "directly connected to" or "directly coupled to" another element or layer, there may be no intervening elements or layers present. Other words used to describe the relationship of elements should be interpreted in a similar manner (e.g., "between … …" and "directly between … …", "adjacent" and "directly adjacent", etc.). As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region or section from another element, component, region or section. Unless clearly indicated by the context, use of terms such as the terms "first," "second," and other numerical values herein does not imply a sequence or order. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
Spatially relative terms, such as "inner," "outer," "below," "… …," "lower," "above," "upper," and the like, may be used herein for ease of description to describe a relationship between one element or feature and one or more other elements or features as illustrated in the figures. Spatially relative terms may be intended to encompass different orientations of the device in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the example term "below … …" can encompass both an orientation of facing upward and downward. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted.
Claims (10)
1. A rechargeable battery comprising a housing and a cell within the housing, the cell comprising a negative active material, wherein the rechargeable battery satisfies the following relationship:
the (gamma. Q. D50 minus)/(S. lambda) is more than or equal to 0.05 and less than or equal to 20;
wherein,
gamma is a unit conversion coefficient;
q is the capacity of the battery cell;
d50 is minus the corresponding particle size when the cumulative volume percentage of the negative electrode active material reaches 50 percent;
s is the ratio of the surface area to the volume of the shell;
λ is the thermal conductivity of the housing.
2. The rechargeable battery according to claim 1, wherein the rechargeable battery satisfies the following relationship:
the (gamma. Q. D50 minus)/(S. lambda.) is not more than 0.07 but not more than 10.
3. The rechargeable battery according to claim 1, wherein the capacity Q of the cell satisfies the following relationship:
5Ah≤Q≤250Ah。
4. the rechargeable battery according to claim 1, wherein the particle size D50 when the cumulative volume percentage of the negative electrode active material reaches 50% negatively satisfies the following relationship:
d50 minus 20 μm is more than or equal to 4 μm.
5. The rechargeable battery according to claim 4, wherein the particle size D50 when the cumulative volume percentage of the negative electrode active material reaches 50% negatively satisfies the following relationship:
d50 with the diameter of 6 mu m or more and the negative diameter of 16 mu m or less.
6. The rechargeable battery according to claim 1, wherein the surface area to volume ratio S of the housing satisfies the following relationship:
50m -1 ≤S≤1000m -1 。
7. the rechargeable battery according to claim 6, wherein the surface area to volume ratio S of the housing satisfies the following relationship:
60m -1 ≤S≤250m -1 。
8. the rechargeable battery according to claim 1, wherein the thermal conductivity λ of the case satisfies the following relation:
λ≥10W/(m·K)。
9. the rechargeable battery according to claim 8, wherein the thermal conductivity λ of the case satisfies the following relation:
200W/(m·K)≤λ≤400W/(m·K)。
10. a rechargeable battery module comprising at least two rechargeable batteries, wherein the rechargeable batteries are the rechargeable batteries according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210648679.XA CN114883658B (en) | 2022-06-09 | 2022-06-09 | Rechargeable battery and rechargeable battery module |
Applications Claiming Priority (1)
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Address after: 215500 No. 68, Xin'anjiang Road, Southeast street, Changshu, Suzhou, Jiangsu Patentee after: Jiangsu Zhengli New Energy Battery Technology Co.,Ltd. Country or region after: China Address before: 215500 No. 68, Xin'anjiang Road, Southeast street, Changshu, Suzhou, Jiangsu Patentee before: Jiangsu Zenergy Battery Technologies Co.,ltd Country or region before: China |