CN117438708A - Battery pack, battery pack, energy storage battery cabinet and energy storage system - Google Patents

Battery pack, battery pack, energy storage battery cabinet and energy storage system Download PDF

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Publication number
CN117438708A
CN117438708A CN202210837786.7A CN202210837786A CN117438708A CN 117438708 A CN117438708 A CN 117438708A CN 202210837786 A CN202210837786 A CN 202210837786A CN 117438708 A CN117438708 A CN 117438708A
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CN
China
Prior art keywords
battery
battery assembly
battery pack
assembly
energy storage
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
CN202210837786.7A
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Chinese (zh)
Inventor
尹小强
尹雪芹
曹虎
阳贵波
王彪
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.)
BYD Co Ltd
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BYD Co Ltd
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 BYD Co Ltd filed Critical BYD Co Ltd
Priority to CN202210837786.7A priority Critical patent/CN117438708A/en
Publication of CN117438708A publication Critical patent/CN117438708A/en
Pending legal-status Critical Current

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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
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • 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
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • 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
    • H01M50/251—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for stationary devices, e.g. power plant buffering or backup power supplies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

A battery assembly, a battery pack, an energy storage battery cabinet and an energy storage system adopting the battery assembly are provided, wherein the battery assembly comprises a plurality of single batteries, and the single batteries are approximately cuboid and have a length L 0 Thickness D 0 Height is H 0 And satisfy 10.ltoreq.L 0 /H 0 ≤12；50≤L 0 /D 0 And is less than or equal to 90 percent. The plurality of single batteries are arranged along the width direction of the battery assembly, the thickness direction of the single batteries is consistent with the width direction of the battery assembly, and the length direction of the single batteries is consistent with the length direction of the battery assembly and extends from one side to the other opposite side of the length direction of the battery assembly. The width dimension of the battery component is D l、 Length dimension L 1 And satisfy D of 75 percent or less 1 /L 1 Less than or equal to 125 percent. Accordingly, the energy density of the battery assembly, the corresponding battery pack, the energy storage battery cabinet and the energy storage system is improved, and meanwhile, the structural stability of the battery assembly is guaranteed.

Description

Battery pack, battery pack, energy storage battery cabinet and energy storage system
Technical Field
The invention relates to the technical field of energy storage, in particular to a battery assembly, a battery pack adopting the battery assembly, an energy storage battery cabinet and an energy storage system.
Background
With the development of electrochemical energy storage technology, energy storage is increasingly applied in the power industry, and requirements on energy density and structural stability of an energy storage battery pack are higher and higher. In the related art, in order to improve the stability of the structure, a large number of auxiliary reinforcing structures are generally required to be arranged, so that the energy density is not high, and omitting the auxiliary reinforcing structures to replace the improvement of the energy density can lead to the structural stability failing to meet the requirement, so that there is room for improvement.
Disclosure of Invention
In view of the above, the present invention is directed to providing a battery assembly, a battery pack, an energy storage battery cabinet and an energy storage system using the battery assembly, which can improve the energy density of the battery assembly and the corresponding battery pack, energy storage battery cabinet and energy storage system, and ensure the structural stability thereof.
The technical scheme of the invention is as follows.
A battery pack having a predetermined length direction and a width direction perpendicular to the length direction, and comprising a plurality of unit cells having a substantially rectangular parallelepiped shape and a length L 0 Thickness D 0 Height is H 0 And satisfy 10.ltoreq.L 0 /H 0 ≤ 12；50≤ L 0 /D 0 ≤ 90；
The plurality of single batteries are arranged along the width direction of the battery assembly, the thickness direction of the single batteries is consistent with the width direction of the battery assembly, and the length direction of the single batteries is consistent with the length direction of the battery assembly and extends from one side to the other opposite side of the length direction of the battery assembly; the width dimension of the battery component is D l、 Length dimension L 1 And satisfy D of 75 percent or less 1 /L 1 ≤125%。
In some embodiments, the single cell satisfies: 70 is less than or equal to L 0 /D 0 ≤ 90。
In some embodiments, the single cell satisfies: 400mm < L 0 ＜1000mm，10mm＜D 0 ＜30mm，90mm＜H 0 ＜200mm。
In some embodiments, the single cell satisfies: 500mm < L 0 ＜970mm，10mm＜D 0 ＜15mm，80mm＜H 0 ＜100mm。
In some embodiments, the battery assembly further comprises a battery support comprising a bottom plate extending in a width direction of the battery assembly and end plates connected to opposite ends of the bottom plate; the bottoms of the plurality of single batteries are at least partially supported on the bottom plate, and the two end plates are clamped at two sides of the thickness direction of the plurality of single batteries; width dimension D of the battery assembly l、 And the distance between the outer end surfaces of the two end plates.
In some embodiments, gaps are preset between at least part of adjacent single cells in the plurality of single cells, and isolation medium layers are filled in the gaps.
In some embodiments, the gap has a distance d 1 And satisfies d of 0.5mm less than or equal to 1 ≤2mm。
In some embodiments, a buffer layer is disposed between at least one of the end plates and an adjacent cell.
In some embodiments, the buffer layer has a thickness d 2 And satisfy d of 1mm less than or equal to 2 ≤3mm。
In some embodiments, the battery support includes two bottom plates, the two bottom plates are disposed at intervals and respectively supported at two ends of the single battery in the length direction, and two ends of the two end plates are respectively fixed on the two bottom plates.
In some embodiments, the battery holder further comprises two baffles respectively disposed on the two bottom plates and used for stopping both ends of the single battery in the length direction.
In some embodiments, the end plate has a thickness d 3 And satisfies d of 10mm 3 ≤50mm。
In some embodiments, the thickness d of the end plate 3 Satisfy d of 15mm 3 ≤25mm。
A battery pack comprising any one of the aforementioned battery assemblies; the battery assembly has a height direction perpendicular to a length direction and a width direction thereof, and the plurality of battery assemblies are stacked along the height direction.
In some embodiments, the battery pack includes K of the battery components, 2.ltoreq.K.ltoreq.16.
In some embodiments, the battery pack has a height dimension H along a height direction of the battery assembly 1 And the height dimension H of the battery pack 1 And the length dimension L of the battery component 1 Meets the requirements of 10 percent to less than or equal to H 1 /L 1 ≤200%。
In some embodiments, the height dimension H of the battery pack 1 And the length dimension L of the battery component 1 Meets the requirements of 80 percent to less than or equal to H 1 /L 1 ≤120%。
In some embodiments, the battery module includes an even number of battery cells; the single battery comprises a positive terminal and a negative terminal, and the positive terminal and the negative terminal are respectively positioned at two opposite ends of the single battery in the length direction.
An energy storage battery cabinet comprising:
a cabinet body;
any battery pack is installed and accommodated in the cabinet body;
the air conditioner assembly is arranged on the cabinet body and used for adjusting the temperature in the cabinet body; a kind of electronic device with high-pressure air-conditioning system
And the battery manager is electrically connected with the battery pack and is used for managing the battery pack.
An energy storage system comprises the energy storage battery cabinet.
In the foregoing battery assembly, the length direction of the unit battery is consistent with the length direction of the battery assembly and extends from one side of the length direction of the battery assembly to the other opposite side, in other words, the length direction of the battery assembly is only provided with one unit battery, the whole unit battery spans from one side to the other side, and the length direction does not need to be provided with an auxiliary reinforcing member, so that higher volume benefit can be ensuredUtilization and energy density. Meanwhile, the plurality of single batteries are arranged along the width direction of the battery assembly, limit and reinforcement can be formed between the single batteries, the single batteries can also play an auxiliary reinforcing role on the formed battery assembly in the length direction, and the overall structural strength of the battery assembly can be ensured. Further, the width dimension of the battery assembly is D l、 Length dimension L 1 Meets the requirement of 75 percent to less than D 1 /L 1 The plane projection of the battery component is close to a square, the gravity center is approximately located at the center, and the stress of each structural member is uniform and the stability is good during transportation and after installation. The battery pack, the energy storage battery cabinet and the energy storage system adopting the battery assembly can also improve the energy density, the structural strength and the overall stability by utilizing the characteristics of the battery assembly.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 is a schematic diagram of an energy storage system according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of the energy storage battery cabinet in fig. 1.
Fig. 3 is a schematic view of a battery pack in the energy storage battery cabinet shown in fig. 2.
Fig. 4 is a schematic view of the structure of the battery pack shown in fig. 3.
Fig. 5 is a left side view of the battery assembly shown in fig. 4, and the view is a broken view.
Fig. 6 is a partially enlarged view of the portion a in fig. 5.
Fig. 7 is a schematic view of the structure of a unit cell in the battery assembly shown in fig. 4.
Fig. 8 is a schematic view of the structure of a battery holder in the battery assembly shown in fig. 4.
Reference numerals:
energy storage system 1000, energy storage battery cabinet 100, distribution box 200, and mounting frame 300
Cabinet 11, battery pack 12, air conditioning unit 12, battery manager 14,
Battery module 120, unit cell 121, battery holder 122, insulating medium layer 123, buffer layer 124,
A bottom plate 1221, end plates 1222, baffles 1223, and a duct gap 1224.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
In the description of the invention, "a plurality" means two or more, and "a number" means one or more.
The following describes specific embodiments of the present invention in detail with reference to the drawings.
As shown in fig. 1, an energy storage system 1000 is disclosed that includes a plurality of energy storage battery cabinets 100 and an electrical box 200. The energy storage system 1000 may be a home energy storage system or a commercial energy storage system, and the number of energy storage battery cabinets 100 included may be set according to specific requirements. The plurality of energy storage battery cabinets 100 are electrically connected with the distribution box 200 to realize distribution management. In some embodiments, the energy storage system 1000 may further include a mounting frame 300, and the battery cabinet 100 and the distribution box 200 may each be mounted on the mounting frame 300.
As shown in fig. 2, the energy storage battery cabinet 100 may include a cabinet 11, a battery pack 12, an air conditioning assembly 13, and a battery manager 14. The cabinet 11 has an accommodating space formed therein, and the battery pack 12 is accommodated in the cabinet 11. The air conditioning unit 13 is mounted on the cabinet 11, and may be mounted inside the cabinet 11, for example, on an inner wall of the cabinet 11, or mounted outside the cabinet 11, so as to regulate the working temperature inside the battery cabinet 100. The battery manager 14 may then be used for charge and discharge management of the battery pack 12.
As shown in fig. 3 to 8, the battery pack 12 includes a plurality of battery packs 120.
Since the architecture of the energy storage system 1000 and the above-described structural levels of the energy storage battery cabinet 100 are not the focus of improvement, and there are many typical implementations of the above-described structural levels in the prior art, the description thereof will not be repeated here. In this application, the improvement of the energy storage system 1000 and the energy storage battery cabinet 100 mainly depends on the battery pack 12 and the battery module 120, so the following detailed description mainly refers to the specific embodiments of the battery pack 12 and the battery module 120.
In the battery pack 12, the battery assembly 120 has a predetermined length direction, a predetermined width direction, and a predetermined height direction, which are perpendicular to each other. The plurality of battery modules 120 are stacked in the height direction. The height direction is understood here as the vertical direction. Generally, in practical applications, the height direction of the energy storage system 1000 or the energy storage battery cabinet 100 included therein after the placement or installation is vertical. The battery pack 12 is substantially rectangular in shape, and therefore, for convenience of understanding, the same direction as the vertical direction of the battery assembly 120 in the normal use state is defined as the height direction thereof, and correspondingly, the length direction and the width direction thereof are defined in the horizontal direction.
The battery assembly 120 includes a plurality of unit cells 121, and the unit cells 121 are substantially rectangular and have a rectangular shapeThe length of the body type single battery is L 0 Thickness D 0 Height is H 0 And satisfy 10.ltoreq.L 0 /H 0 ≤ 12；50≤ L 0 /D 0 And is less than or equal to 90 percent. The unit cell 121 is substantially rectangular, which means that the main body portion of the unit cell 121 is rectangular, but the unit cell 121 generally further includes an electrode terminal, an explosion-proof valve, and other structures located at the end of the main body portion, and the whole unit cell is not strictly rectangular, or the whole unit cell is not strictly rectangular due to factors such as dimensional and form tolerance, local special-shaped, and the like, but generally satisfies the rectangular shape. Accordingly, the length of the unit cell 121 may be understood as the length of the body portion of the unit cell 121, i.e., the portion excluding the electrode terminals.
The plurality of unit cells 121 are arranged along the width direction of the battery assembly 120, and the thickness direction of the unit cells 121 is identical to the width direction of the battery assembly 120, and the length direction of the unit cells 121 is identical to the length direction of the battery assembly 120. Meanwhile, each single battery 121 extends from one side to the other opposite side of the battery assembly 120 in the length direction, in other words, only one single battery 121 is disposed in the length direction of each battery assembly 120, the single battery 121 is integrally spanned from one side to the other side, and auxiliary reinforcing members are not required to be disposed along the length direction of the battery assembly 120, so that higher volume utilization rate and energy density can be ensured. Meanwhile, the plurality of unit cells 121 are arranged along the width direction of the battery assembly 120, so that the limit and reinforcement between the unit cells can be formed, and the unit cells can play an auxiliary reinforcing role on the formed battery assembly 120 in the length direction, so that the overall structural strength of the battery assembly 120 can be ensured.
Further, the battery assembly 120 has a width dimension D l、 Length dimension L 1 And satisfy D of 75 percent or less l / L 1 Less than or equal to 125 percent. The width dimension D of the battery assembly 120 l Length dimension L 1 The battery assembly 120 is limited in the proportion range, so that the plane projection of the battery assembly 120 is approximate to a square, the gravity center is approximately at the center position, and the stress of each structural member is relatively uniform and stable during transportation and after installationGood quality. For example, in practice, the width dimension D of the battery assembly 120 l、 Length dimension L 1 A ratio of about 1:1 may be preferred to allow the projection of the battery assembly 120 on a horizontal plane to approximate a square, controlling the center of gravity distribution to improve stability. Of course, in a specific implementation, the width dimension D l、 Length dimension L 1 The ratio of (c) may also be adjusted within the above range according to specific requirements.
At the same time, length L of rectangular unit cell 121 0 Thickness D 0 Height H 0 Satisfy L which is more than or equal to 10 0 /H 0 ≤ 12；50≤ L 0 /D 0 And 90, which is also to increase the volumetric energy density as much as possible while ensuring the stability and the overall structural strength of the battery assembly 1. Specifically, the ratio of the length to the thickness of the unit cells 121 is defined because when the ratio is larger, the larger the number of unit cells 121 that can be arranged is, the larger the volume utilization increases, the more the amount of electricity is provided, and at the same time, in order to make the sum of the thickness dimensions of the unit cells 121 arranged in the thickness direction approximate to the length of the unit cells 121, the projected shape of the unit cells arranged in the horizontal direction approximates to a square with the center of gravity in the middle. When a plurality of battery packs 120 are stacked from bottom to top, the center of gravity of the entire battery pack 12 is also located in the middle, and is relatively stable. When the ratio of the length to the thickness of the single battery 121 is too large, the structural strength of the single battery 121 is weakened, and the internal battery cells are damaged by expansion force generated by repeated charge and discharge cycles; when the ratio of the length to the thickness of the unit cells is too small, the number of the unit cells 121 included in each layer of the battery assembly 120 becomes small under the condition of ensuring the stability, and if the number of the unit cells 121 is increased, not only the structure of the battery assembly 120 is unstable, but also the stacking height is limited when a plurality of the battery assemblies 120 are stacked into the battery pack 12. The inventors have long studied and have conducted many experiments to confirm that the above-mentioned dimensional requirements are satisfied in order to simultaneously satisfy the above-mentioned requirements for stability, overall structural strength, and volume energy density improvement of the battery assembly 1.
The battery pack 12, the energy storage battery cabinet 100 and the energy storage system 1000 using the battery assembly 120 can also improve the energy density, the structural strength and the overall stability by utilizing the above characteristics of the battery assembly 120.
In some embodiments, the single cell satisfies: 70 is less than or equal to L 0 /D 0 ≤ 90。
In some embodiments, the single cell satisfies: 400mm < L 0 ＜1000mm，10mm＜D 0 ＜30mm，90mm＜H 0 And < 200mm. In some situations, such as a wall-mounted energy storage battery cabinet 100 for home use, the unit cells 121 need to be in a flat configuration as much as possible, and the unit cells 121 on each battery assembly 120 need to be in a flat configuration as much as possible after being arranged. Therefore, after the energy storage battery cabinet 100 adopting the single battery 121 is hung on a wall, the size of the protruding wall surface is less likely to exceed 500mm, so that the normal activities of users in families are hardly interfered, and the use requirements of the users in the families are more satisfied.
In some embodiments, the single cell satisfies: 500mm < L 0 ＜970mm，10mm＜D 0 ＜15mm，80mm＜H 0 And < 100mm. In some usage situations, for example, the energy storage battery cabinet 1 used in industry and commerce generally requires that the unit cells 121 are arranged one by one in length, and a plurality of unit cells 121 can be stacked in a thickness direction and a height direction. In this way, the energy storage battery cabinet 1 adopting the single battery 121 has more stored electric quantity and stronger power supply capability, and meets the use requirements of industry and commerce.
In some embodiments, the battery assembly 120 further includes a battery holder 122, and the battery holder 122 includes a bottom plate 1221 extending in a width direction of the battery assembly 120 and end plates 1222 connected to opposite ends of the bottom plate 1221. The bottoms of the plurality of unit cells 121 are at least partially supported on the bottom plate 1221, and the two end plates 1222 are sandwiched between the two sides of the plurality of unit cells 121 in the thickness direction. The width dimension D of the battery assembly 120 l、 Is the spacing of the outer end surfaces of the two end plates 1222.
Through setting up battery support 122, can utilize battery support 122 to fix a plurality of battery cells 121 to can utilize the structural strength of battery support 122 itself to assist the structural strength who improves battery cell 121, thereby make the battery support 122, the quantity that can arrange among energy storage battery cabinet 100 and the energy storage system 1000 battery assembly 120 can be more, for example, in battery support 122, the quantity of battery assembly 120 can be 6-20 and pile up in proper order in the direction of height, like this energy storage battery cabinet 100 and energy storage system 1000's volume utilization is bigger and energy density is higher.
In some embodiments, among the plurality of unit cells 121, a gap is preset between at least some adjacent unit cells 121, and the gap is filled with an isolation medium layer 123. In a specific implementation, the insulating medium layer 123 may be made of an insulating material or a heat-insulating material, so that the influence of transportation vibration and battery expansion on the battery assembly 1 can be reduced, the heat spreading between the single batteries can be prevented, the risk of damage to the battery module structure and thermal runaway is reduced, and an insulating effect can be achieved. The isolating dielectric layer 123 may partially fill the corresponding gap, for example, the isolating dielectric layer 123 may include a limiting portion and an isolating portion, the thickness of the limiting portion may be substantially the same as the distance of the gap to define a position between adjacent unit cells 121, and the thickness of the isolating portion is smaller than the distance of the gap, thereby leaving a portion of the gap between adjacent unit cells 121 and reducing the influence of transportation vibration and battery expansion on the battery assembly 1.
In some embodiments, the gap has a distance d 1 And satisfies d of 0.5mm less than or equal to 1 ≤2mm。
In some embodiments, a buffer layer 124 is disposed between at least one of the end plates 1222 and an adjacent cell 121. The buffer layer 124 may be made of foam, and the end plate 1222 is provided with foam, which may be used to buffer the expansion force generated during the use of the unit cell 121, and at the same time, the buffer layer 124 may be elastically stretched to counteract the accumulation of dimensional tolerance during the assembly. The thickness of the buffer layer is d 2 And satisfy d of 1mm less than or equal to 2 ≤3mm。
When the battery assembly 120 further includes at least one of the aforementioned insulating medium layer 123, buffer layer 124The width dimension D of the battery assembly 120 l Still being the spacing of the outer end surfaces of the two end plates 1222, the width dimension D l The thickness of the isolation medium layer 123 and the buffer layer 124 is included.
In some embodiments, the end plate 1222 has a thickness d 3 And satisfies d of 10mm 3 Less than or equal to 50mm. Further, the thickness d of the end plate 1222 3 Satisfy d of 15mm 3 Less than or equal to 25mm. Thus, the end plate 1222 is not excessively thick to cause excessive volume occupation while satisfying the structural strength required for constraint.
In some embodiments, the battery holder 122 includes two bottom plates 1221, the two bottom plates 1221 are disposed at intervals and respectively supported at two ends of the unit battery 121 in the length direction, and two ends of the two end plates 1222 are respectively fixed on the two bottom plates 1221. In this way, the interval between the two bottom plates 1221 forms the air duct gap 1224, and the two bottom plates 1221 can also guide the air entering the air duct gap 1224, so that the heat dissipation efficiency of the air to the single battery 121 is improved, the single battery 121 is less prone to being damaged by heat, and the service life of the energy storage battery cabinet 100 is prolonged.
In some embodiments, the battery holder further includes two baffles 1223, and the two baffles 1223 are disposed on the two bottom plates 1221, respectively, and serve to stop both ends of the unit cells 121 in the length direction. Specifically, the width of the baffle 1223 may be smaller than the width of the corresponding bottom plate 1221, the baffle 1223 may be stacked and fixed on the upper side of the corresponding bottom plate 1221, the outer side of the baffle 1223 in the width direction may be substantially flush with the outer side of the bottom plate 1221, and the inner side and the bottom plate 1221 together form a stop step, by which the end of the unit cell 121 is stopped when the temperature end is supported on the corresponding bottom plate 1221.
The aforementioned battery pack 120 includes a plurality of battery modules 120, and the plurality of battery modules 120 are stacked in the height direction. For example, in some embodiments, the battery pack includes K of the battery assemblies, 2.ltoreq.K.ltoreq.16. The adjacent battery modules 120 can be mounted and fixed by the connection between the battery holders 122. For example, the battery holders 122 of adjacent battery packs 120 may be secured by screw connections.
In some embodiments, the battery pack has a height dimension H along a height direction of the battery assembly 1 And the height dimension H of the battery pack 1 And the length dimension L of the battery component 1 Meets the requirements of 10 percent to less than or equal to H 1 /L 1 Less than or equal to 200 percent, and further, the height dimension H of the battery pack 1 And the length dimension L of the battery component 1 Meets the requirements of 80 percent to less than or equal to H 1 /L 1 Less than or equal to 120 percent. In this way, the center of the battery pack 120 can be made as close to the geometric center as possible, and the structure is more stable. When the battery holder 122 includes a plurality of battery packs 120, the height H of the battery holder 122 1 It is understood that the sum of the heights of a plurality of the battery packs 120.
In some embodiments, the battery module includes an even number of battery cells; the single battery comprises a positive terminal and a negative terminal, and the positive terminal and the negative terminal are respectively positioned at two opposite ends of the single battery in the length direction. As such, the positive and negative terminals of the unit cells 121 are located at opposite sides, and an even arrangement facilitates connection between the upper and lower battery packs 120.
In the description herein, reference to the term "particular embodiment," "particular example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims (20)

1. A battery pack having a predetermined length direction and a width direction perpendicular to the length direction, and comprisingA plurality of battery cells, its characterized in that: the single battery is approximately cuboid and has a length L 0 Thickness D 0 Height is H 0 And satisfy 10.ltoreq.L 0 /H 0 ≤ 12；50≤ L 0 /D 0 ≤ 90；
The plurality of single batteries are arranged along the width direction of the battery assembly, the thickness direction of the single batteries is consistent with the width direction of the battery assembly, and the length direction of the single batteries is consistent with the length direction of the battery assembly and extends from one side to the other opposite side of the length direction of the battery assembly; the width dimension of the battery component is D l、 Length dimension L 1 And satisfy D of 75 percent or less 1 /L 1 ≤125%。
2. The battery assembly of claim 1, wherein the cells satisfy: 70 is less than or equal to L 0 /D 0 ≤ 90。
3. The battery assembly of claim 1, wherein the cells satisfy: 400mm < L 0 ＜1000mm，10mm＜D 0 ＜30mm，90mm＜H 0 ＜200mm。
4. The battery assembly of claim 3, wherein the single cells satisfy: 500mm < L 0 ＜970mm，10mm＜D 0 ＜15mm，80mm＜H 0 ＜100mm。
5. The battery assembly of any one of claims 1-3, further comprising a battery support including a bottom plate extending in a width direction of the battery assembly and end plates connected to opposite ends of the bottom plate; the bottoms of the plurality of single batteries are at least partially supported on the bottom plate, and the two end plates are clamped at two sides of the thickness direction of the plurality of single batteries; width dimension D of the battery assembly l、 And the distance between the outer end surfaces of the two end plates.
6. The battery assembly of claim 5, wherein a gap is preset between at least some adjacent single cells among the plurality of single cells, and the gap is filled with an isolation medium layer.
7. The battery assembly of claim 6, wherein the gap has a distance d 1 And satisfies d of 0.5mm less than or equal to 1 ≤2mm。
8. The battery assembly of claim 5, wherein a buffer layer is disposed between at least one of the end plates and an adjacent cell.
9. The battery assembly of claim 8, wherein the buffer layer has a thickness d 2 And satisfy d of 1mm less than or equal to 2 ≤3mm。
10. The battery pack according to claim 5, wherein the battery holder comprises two bottom plates, the two bottom plates are arranged at intervals and respectively supported at two ends of the single battery in the length direction, and two ends of the two end plates are respectively fixed on the two bottom plates.
11. The battery pack according to claim 10, wherein the battery holder further comprises two baffles respectively provided on the two bottom plates and adapted to stop both ends of the unit cells in a length direction.
12. The battery assembly of claim 5, wherein the end plate has a thickness d 3 And satisfies d of 10mm 3 ≤50mm。
13. The battery assembly of claim 12, wherein the thickness d of the end plate 3 Satisfy d of 15mm 3 ≤25mm。
14. A battery pack comprising a plurality of battery assemblies as claimed in any one of claims 1 to 13; the battery assembly has a height direction perpendicular to a length direction and a width direction thereof, and the plurality of battery assemblies are stacked along the height direction.
15. The battery pack of claim 14, wherein the battery pack comprises K of the battery assemblies, 2.ltoreq.k.ltoreq.16.
16. The battery pack according to claim 14, wherein the battery pack has a height dimension H in a height direction of the battery assembly 1 And the height dimension H of the battery pack 1 And the length dimension L of the battery component 1 Meets the requirements of 10 percent to less than or equal to H 1 /L 1 ≤200%。
17. The battery pack of claim 16, wherein the height dimension H of the battery pack 1 And the length dimension L of the battery component 1 Meets the requirements of 80 percent to less than or equal to H 1 /L 1 ≤120%。
18. The battery pack of claim 14, wherein the battery module comprises an even number of battery cells; the single battery comprises a positive terminal and a negative terminal, and the positive terminal and the negative terminal are respectively positioned at two opposite ends of the single battery in the length direction.
19. An energy storage battery cabinet, comprising:
a cabinet body;
the battery pack of any one of claims 14-18 mounted and housed within the cabinet;
the air conditioner assembly is arranged on the cabinet body and used for adjusting the temperature in the cabinet body; a kind of electronic device with high-pressure air-conditioning system
And the battery manager is electrically connected with the battery pack and is used for managing the battery pack.
20. An energy storage system, characterized by: comprising at least one energy storage battery cabinet according to claim 19.
CN202210837786.7A 2022-07-15 2022-07-15 Battery pack, battery pack, energy storage battery cabinet and energy storage system Pending CN117438708A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210837786.7A CN117438708A (en) 2022-07-15 2022-07-15 Battery pack, battery pack, energy storage battery cabinet and energy storage system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210837786.7A CN117438708A (en) 2022-07-15 2022-07-15 Battery pack, battery pack, energy storage battery cabinet and energy storage system

Publications (1)

Publication Number Publication Date
CN117438708A true CN117438708A (en) 2024-01-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
CN (1) CN117438708A (en)

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