WO2026007809A1 - 电池模组与储能系统 - Google Patents

电池模组与储能系统

Info

Publication number
WO2026007809A1
WO2026007809A1 PCT/CN2025/103997 CN2025103997W WO2026007809A1 WO 2026007809 A1 WO2026007809 A1 WO 2026007809A1 CN 2025103997 W CN2025103997 W CN 2025103997W WO 2026007809 A1 WO2026007809 A1 WO 2026007809A1
Authority
WO
WIPO (PCT)
Prior art keywords
reinforcing rib
battery module
end plate
battery
rib structure
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
PCT/CN2025/103997
Other languages
English (en)
French (fr)
Inventor
戢明浩
谢涵宇
江冬圆
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.)
Xiamen Hithium Energy Storage Technology Co Ltd
Shenzhen Hithium Energy Storage Technology Co Ltd
Original Assignee
Xiamen Hithium Energy Storage Technology Co Ltd
Shenzhen Hithium Energy Storage Technology 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 Xiamen Hithium Energy Storage Technology Co Ltd, Shenzhen Hithium Energy Storage Technology Co Ltd filed Critical Xiamen Hithium Energy Storage Technology Co Ltd
Publication of WO2026007809A1 publication Critical patent/WO2026007809A1/zh
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • H01M50/242—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 adapted for protecting batteries against vibrations, collision impact or swelling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • 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
    • 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
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • H01M50/264—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
    • 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

Definitions

  • This disclosure relates to the field of cleaning equipment technology, and more specifically, to a cleaning brush head and cleaning equipment.
  • Secondary batteries also known as rechargeable batteries or storage batteries, are batteries that can be recharged after discharge to reactivate the active materials and continue to be used. Their recyclable nature has made them a primary power source for electrical equipment. Since the voltage and capacity of a single secondary battery are limited, multiple battery cells need to be grouped together to meet the high voltage and large capacity requirements of the system. This involves connecting several battery cells in series or parallel to form a battery module with a specific voltage and capacity.
  • battery cell stacking typically involves placing two end plates at both ends of the battery pack stacking direction, followed by using steel cable ties to bind the end plates and battery pack together. This achieves battery cell stacking and limits the expansion of the battery module during power-on operation. Therefore, the structural strength requirements for the end plates are relatively high.
  • the purpose of this disclosure is to provide a battery module and an energy storage system.
  • a battery module comprising:
  • At least one battery pack comprising a plurality of battery cells arranged along a first direction; when the battery module comprises a plurality of the battery packs, the plurality of battery packs are arranged along a second direction, the second direction intersecting the first direction;
  • a first end plate is located at one end of the battery pack along the first direction.
  • the first end plate is provided with clamping areas in the same number as the battery pack.
  • the multiple clamping areas are provided in one-to-one correspondence with the multiple battery packs.
  • the clamping area is provided with a first reinforcing rib structure, which is a mesh structure, and the distribution density of the first reinforcing rib structure decreases from the center area of the clamping area toward the edge area.
  • the battery module disclosed herein has a first reinforcing rib structure in the clamping area of the first end plate, which has a mesh-like structure.
  • the distribution density of the first reinforcing rib structure decreases from the center area of the clamping area towards the edge area. Therefore, the first reinforcing rib structure can absorb the expansion force of the battery pack during the expansion process, which varies radially outward on the end plate.
  • the first reinforcing rib structure is more in line with the expansion change law of the battery pack, avoiding the risk of failure of individual battery cells. At the same time, it effectively utilizes the material strength of the end plate, reduces the strength requirements of the end plate material itself, and reduces the material cost of the end plate.
  • an energy storage system which includes the battery module described above.
  • Figure 1 is a schematic diagram of an energy storage system provided in one embodiment of the present disclosure.
  • FIG. 2 is a schematic diagram of a battery module provided in one embodiment of this disclosure.
  • Figure 3 is an exploded view of a battery module provided in one embodiment of this disclosure.
  • Figure 4 is a front view of a first end plate provided in an embodiment of this disclosure.
  • Figure 5 is a front view of a first endplate provided in an embodiment of this disclosure.
  • Figure 6 is a schematic diagram of the back of a first end plate provided in an embodiment of this disclosure.
  • Figure 7 is a front view of a first end plate provided in another embodiment of this disclosure.
  • Figure 8 is a front view of a first endplate provided in another embodiment of this disclosure.
  • Figure 9 is a schematic diagram of the back of the first end plate provided in another embodiment of the present disclosure.
  • Figure 10 is a strain contour plot of the first endplate provided in another embodiment of this disclosure.
  • Figure 11 is a displacement contour plot of the first end plate provided in another embodiment of this disclosure.
  • Figure 12 is a stress cloud diagram of the first end plate provided in another embodiment of this disclosure.
  • green energy mainly includes solar energy, wind energy, and hydropower.
  • solar and wind energy generally suffer from strong intermittency and large fluctuations, which can cause voltage instability in the green power grid (insufficient electricity during peak demand and excessive electricity during off-peak demand). Unstable voltage can damage the power grid, and therefore may lead to the problem of "curtailment of wind and solar power" due to insufficient electricity demand or insufficient grid capacity.
  • an energy storage device converts electrical energy into other forms of energy through physical or chemical means and store it. When needed, the stored energy is converted back into electrical energy and released. Simply put, an energy storage device is like a large “power bank,” storing electrical energy when solar and wind power are abundant and releasing it when required.
  • energy storage power stations can achieve load matching of power in time and space, enhance the renewable energy absorption capacity, reduce instantaneous power changes, reduce the impact on the power grid, improve the problem of new energy power generation absorption, and play a significant role in power grid system backup, alleviating peak load power supply pressure and peak regulation and frequency regulation.
  • Large energy storage containers used in grid-side energy storage scenarios mainly function as peak shaving, frequency regulation, and alleviating grid congestion.
  • peak shaving they can achieve peak shaving and valley filling of electricity load, that is, charging the energy storage battery when the electricity load is low and releasing the stored electricity during the peak electricity load period, thereby achieving a balance between power production and consumption, such as energy storage power station systems.
  • Small and medium-sized energy storage cabinets used in commercial and industrial energy storage scenarios (banks, shopping malls, etc.) and small household energy storage boxes used in home energy storage scenarios primarily function to generate and consume electricity, peak shaving and valley filling, capacity cost management, and improve power supply reliability.
  • energy storage on the electricity consumption side can be divided into commercial and industrial energy storage cabinets, household energy storage devices, and energy storage charging piles, which are generally used in conjunction with distributed photovoltaic systems. Due to the significant price differences in electricity prices at peak and valley times based on electricity demand, users with energy storage devices typically charge the energy storage cabinets/boxes during off-peak periods to reduce costs; during peak periods, the electricity stored in the energy storage devices is then released for use to save on electricity costs.
  • Figure 1 is a schematic diagram of an energy storage system provided in an embodiment of this disclosure.
  • the embodiment of Figure 1 is illustrated using a shared energy storage scenario on the generation/distribution side as an example.
  • the energy storage system of this disclosure is not limited to the generation/distribution side energy storage scenario, but can also be applied to scenarios such as industrial and commercial side or user side.
  • the energy storage system includes: an energy storage device 10, a power grid 20, a first power conversion device 30, and a second power conversion device 40.
  • the first power conversion device 30 and the second power conversion device 40 convert other forms of energy into electrical energy, which is then connected to the power grid 20 and supplied to the power consumption side of the distribution network.
  • the excess electricity is stored in the energy storage device 10, reducing wind and solar power curtailment rates and improving the absorption of new energy power generation.
  • the power grid issues an instruction to transmit the electricity stored in the energy storage device 10 in conjunction with the power grid 20 in a grid-connected mode to supply power to the power consumption side, providing various services such as peak shaving, frequency regulation, and backup for the power grid operation.
  • This fully leverages the peak shaving function of the power grid 20, promotes peak shaving and valley filling, and alleviates the power supply pressure on the power grid 20.
  • the first power conversion device 30 can be a solar energy conversion device
  • the second power conversion device 40 can be a wind energy conversion device; of course, the power conversion device can also be a device that converts at least one of thermal energy, tidal energy, biomass energy and mechanical energy into electrical energy.
  • the energy storage device 10 includes at least one set of chemical batteries.
  • the chemical elements within these batteries serve as the energy storage medium, and the charging and discharging process is achieved through the chemical reactions or changes in the storage medium.
  • electrical energy generated from solar or wind power is stored in at least one set of chemical batteries through the chemical reactions or changes in the storage medium.
  • the stored energy is released through the chemical reactions or changes in the storage medium for use, or transferred to areas with power shortages.
  • the energy storage device may include a battery module.
  • the battery module includes multiple battery cells. When the multiple battery cells are fixed, end plates can be assembled at both ends, and the multiple battery cells are bundled together by the end plates and cable ties.
  • the battery cells may be lithium-ion secondary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, magnesium-ion batteries, etc., and the battery cells may be cylindrical, flat, cuboid, etc., and the embodiments of this application do not limit this.
  • the battery module 100 includes at least one battery pack 110 and a first end plate 210.
  • the battery pack 110 includes a plurality of battery cells 111 arranged along a first direction X.
  • the plurality of battery packs 110 are arranged along a second direction Y, which intersects with the first direction X.
  • the first end plate 210 is located at one end of the battery pack 110 along the first direction X, and the first end plate 210 is provided with clamping areas 201 in the same number as the number of battery packs 110.
  • the plurality of clamping areas 201 are arranged one-to-one with the plurality of battery packs 110.
  • the clamping area 201 is provided with a first reinforcing rib structure 211.
  • the first reinforcing rib structure 211 has a mesh structure, and the distribution density of the first reinforcing rib structure 211 on the clamping area 201 decreases from the central region of the clamping area 201 toward the edge region.
  • the first reinforcing rib structure 211 of the mesh structure may include multiple cross-connected reinforcing ribs.
  • the distribution density of the first reinforcing rib structure 211 of the mesh structure reflects the density of the distribution of multiple reinforcing ribs on the first end plate 210.
  • the distribution density can be reflected by the number of ribs distributed per unit area on the first end plate 210.
  • the distribution density of the first reinforcing rib structure 211 can be expressed as the ratio of the number of reinforcing ribs to the area of the region where multiple reinforcing ribs are distributed on the clamping area 201 of the first end plate 210.
  • the distribution density of the first reinforcing rib structure 211 in one unit area is greater than the distribution density of the first reinforcing rib structure 211 in the other unit area.
  • the distribution density of the first reinforcing rib structure 211 can also be reflected by the average distance between multiple reinforcing ribs. For example, the average distance between any two reinforcing ribs is the average distance.
  • the widths of the multiple reinforcing ribs can be the same or substantially the same.
  • the battery module 100 provided in this disclosure has a first reinforcing rib structure 211 with a mesh structure on the clamping area 201 of the first end plate 210.
  • the distribution density of the first reinforcing rib structure 211 on the clamping area 201 decreases from the center area to the edge area. Therefore, the first reinforcing rib structure 211 can absorb the expansion force of the battery pack 110 during the expansion process, where the displacement on the first end plate 210 changes radially outward.
  • the first reinforcing rib structure 211 is more in line with the expansion change law of the battery pack 110, avoiding the risk of failure of the battery cells 111. At the same time, it effectively utilizes the material strength of the first end plate 210, reduces the strength requirements of the material of the first end plate 210 itself, and reduces the material cost of the first end plate 210.
  • the stacking direction of multiple battery cells 111 in the battery pack 110 is perpendicular to the large surface of the battery cell 111 along the first direction X.
  • the large surface of the battery cell 111 can be considered as the surface with the largest area of the battery cell 111.
  • the large surface of the battery cell 111 can be considered as the surface of the battery cell 111 that generates the most heat. For example, when the battery cell 111 is a square battery, the battery cell 111 includes two opposing large surfaces.
  • the battery cell 111 comprises a cell and an electrolyte, and is the smallest unit capable of electrochemical reactions such as charging/discharging.
  • the cell of the battery cell 111 refers to a unit formed by winding or laminating stacked portions, which include a first electrode, a separator, and a second electrode. When the first electrode is a positive electrode, the second electrode is a negative electrode. The polarities of the first and second electrodes can be interchanged.
  • the cell is disposed within the battery casing of the battery cell 111.
  • the battery cell 111 can be a wound battery, which involves winding a first electrode, a second electrode with the opposite electrical charge, and a separator between the first and second electrodes to obtain a wound cell.
  • the battery cell 111 can also be a stacked battery, which is not only convenient for assembly but also allows for the production of longer batteries.
  • the cell is a stacked cell, which has first electrodes, second electrodes with the opposite electrical charge, and a separator between the first and second electrodes, stacked together to form a stacked cell.
  • the battery cell 111 can be a square battery, that is, the battery cell 111 can be a tetragonal prism battery.
  • a tetragonal prism battery mainly refers to a prism shape, but it is not strictly limited that each side of the prism must be a straight line in the strict sense, and the corners between the sides do not have to be right angles, but can be rounded.
  • the battery cell 111 can also be a cylindrical battery, and this disclosure does not impose any restrictions on this.
  • the battery module 100 includes a battery pack 110, and a clamping area 201 is provided on the first end plate 210.
  • this application will describe in detail the structure of the first end plate 210, taking the battery module 100 including a battery pack 110 and the first end plate 210 being provided with a clamping area 201 as an example.
  • the first reinforcing rib structure 211 is disposed on the surface of the first end plate 210 facing away from the battery pack 110.
  • the surface of the first end plate 210 facing the battery pack 110 is a flat and smooth surface, that is, the side of the first end plate 210 that clamps and fixes the battery pack 110 is a smooth surface, which can provide a better clamping effect on the battery pack 110.
  • the first reinforcing rib structure 211 faces outward, which can improve the heat dissipation capacity of the first end plate 210 and avoid the structural strength of the first end plate 210 being affected too much by high temperature.
  • first reinforcing rib structure 211 can also be provided on the surface of the first end plate 210 facing the battery pack 110; in this case, another pad can also be separately provided between the first end plate 210 and the battery pack 110, and the expansion force generated by the battery pack 110 is transmitted to the first end plate 210 through the pad.
  • first reinforcing rib structure 211 can be provided on both opposite sides of the first end plate 210, and this disclosure does not limit this.
  • the first reinforcing rib structure 211 includes multiple annular reinforcing ribs 2111 with different diameters, and the multiple annular reinforcing ribs 2111 are concentrically arranged.
  • the displacement on the first end plate 210 changes outward in an elliptical radial pattern; by providing multiple annular reinforcing ribs 2111 on the first end plate 210, the structural strength of the first end plate 210 can be specifically improved according to the law of the outward elliptical radial change in the displacement on the first end plate 210.
  • the spacing between at least two adjacent annular reinforcing ribs 2111 increases.
  • the spacing between adjacent annular reinforcing ribs 2111 that is, by decreasing the distribution density of the first reinforcing rib structure 211 from the center region to the edge region of the clamping area 201
  • the expansion force of the battery pack 110 during expansion is absorbed.
  • the material strength of the end plate is effectively utilized, reducing the strength requirements of the end plate material itself.
  • the displacement limits of the simulation cloud map at the center of the force are 50.0 mm, 70.9 mm, 89.1 mm, and 105.0 mm, respectively.
  • the arc diameter of the first end plate 210 can be designed based on these parameters. This principle can be used to optimize the end plate according to different battery packs 110.
  • the first reinforcing rib structure 211 further includes a plurality of first strip reinforcing ribs 2112, which are radially distributed around the center of the annular reinforcing rib 2111.
  • the plurality of first strip reinforcing ribs 2112 in conjunction with the plurality of first annular reinforcing ribs 2111, form a star-shaped, dispersed reinforcing rib pattern, ensuring that the first end plate 210 has sufficient strength in all directions to support the battery pack 110 and to disperse the expansion force of the entire battery pack 110.
  • the included angle between two adjacent first strip reinforcing ribs 2112 is the same, that is, multiple first strip reinforcing ribs 2112 are evenly distributed, which can further effectively disperse the expansion force of the entire battery pack 110.
  • the first annular reinforcing rib 2111 can be provided, for example, four first annular reinforcing ribs 2111 of different diameters are concentrically nested, and the spacing between two adjacent first annular reinforcing ribs 2111 increases from the center region of the first end plate 210 towards the edge region.
  • the first strip reinforcing rib 2112 can be provided, and the twelve first strip reinforcing ribs 2112 are radially and evenly distributed with the dot of the first annular reinforcing rib 2111 as the center, thereby ensuring that the first end plate 210 has sufficient strength in all directions to support and disperse the expansion force of the entire battery pack 110.
  • first annular reinforcing ribs 2111 can also be two, three, five or more.
  • the spacing between two partially adjacent first annular reinforcing ribs 2111 increases from the center region to the edge region of the first end plate 210, and the spacing between two partially adjacent first annular reinforcing ribs 2111 can also be the same from the center region to the edge region of the first end plate 210.
  • the number of first strip reinforcing ribs 2112 can be two, three, four or more.
  • the included angle between two partially adjacent first strip reinforcing ribs 2112 can be the same, and the included angle between two partially adjacent first strip reinforcing ribs 2112 can also be different. This disclosure does not limit this.
  • At least one cylindrical reinforcing rib 214 is also provided on the clamping area 201, and at least part of the intersection of the first strip reinforcing rib 2112 and the annular reinforcing rib 2111 is connected by the cylindrical reinforcing rib 214.
  • the stress at the intersection of the first strip reinforcing rib 2112 and the annular reinforcing rib 2111 is dispersed, avoiding the rupture of the intersection of the first strip reinforcing rib 2112 and the annular reinforcing rib 2111 after being subjected to the expansion force of the battery pack 110, thereby improving the structural strength at the intersection of the first strip reinforcing rib 2112 and the annular reinforcing rib 2111.
  • the columnar reinforcing rib 214 by setting the columnar reinforcing rib 214, it can also be used as the position where the first end plate 210 abuts against the tooling during assembly; the tooling abuts against the position of the columnar reinforcing rib 214, and then the stacked first end plate 210 and battery pack 110 are tied together with cable ties, and then the tooling is removed, which improves the assembly efficiency and assembly accuracy of the first end plate 210.
  • Two columnar reinforcing ribs 214 can be provided along the second direction Y, and the two columnar reinforcing ribs 214 are symmetrically arranged. Of course, three, four or more columnar reinforcing ribs 214 can also be provided, and multiple columnar reinforcing ribs 214 are symmetrically arranged along the second direction Y or the third direction Z.
  • the third direction Z intersects the first direction X and the second direction Y.
  • the third direction Z is perpendicular to the first direction X and the second direction Y.
  • the first direction X is perpendicular to the second direction Y. That is, the first direction X is the thickness direction of the first end plate 210, the second direction Y is the width direction of the first end plate 210, and the third direction Z is the height direction of the first end plate 210.
  • the first reinforcing rib structure 211 is symmetrical along the second direction Y.
  • the expansion force of the entire battery pack 110 can be uniformly distributed in the second direction Y.
  • the first reinforcing rib structure 211 is symmetrical along the third direction Z.
  • the expansion force of the entire battery pack 110 can be evenly distributed along the third direction Z.
  • the first end plate 210 includes a body portion and a first reinforcing rib structure 211.
  • the body portion is provided with clamping areas 201, which are the same number as the number of battery packs 110.
  • the first reinforcing rib structure 211 is located on the surface of the clamping areas 201. That is, the first reinforcing rib structure 211 is a structure separately provided on the surface of the first end plate 210.
  • the body portion of the first end plate 210 itself does not undergo structural changes, so that the body portion of the first end plate 210 maintains its original structural strength.
  • the structural strength of the first end plate 210 is increased by adding the first reinforcing rib structure 211.
  • the first reinforcing rib structure 211 and the main body can be an integral structure, for example, formed by injection molding or casting.
  • the first reinforcing rib structure 211 and the main body can also be fixedly connected by welding, bonding or other methods.
  • the first end plate 210 can be made of metal, plastic or composite material. By setting the first reinforcing rib structure 211, the properties of the material itself can be fully utilized, reducing the strength requirements of the material itself.
  • a second reinforcing rib structure 212 is also provided on the clamping area 201.
  • the second reinforcing rib structure 212 is distributed on both sides of the first reinforcing rib structure 211 on a third direction Z intersecting the first direction X and the second direction Y. Since the height dimension of the first end plate 210 in the third direction Z is greater than its width dimension in the second direction Y, the force cloud diagram of the first end plate 210 is elliptical, meaning that the expansion force on the upper and lower sides of the first end plate 210 is relatively large.
  • the first end plate 210 is made of PA5T plastic material (80%).
  • the maximum strain of the first end plate 210 is 0.067%
  • the maximum displacement of the first end plate 210 is 7.422 mm
  • the maximum stress of the first end plate 210 is 153.596 MPa.
  • the material PA5T plastic of the first end plate 210 has an elongation at break of 3.2%, which shows that the stress concentration on the first end plate 210 is reduced, making the stress on the first end plate 210 more uniform.
  • the strength of the first end plate 210 meets the expansion force requirements of the battery pack 110.
  • the structural strength of the upper and lower sides of the first end plate 210 can be improved, thereby reducing stress concentration.
  • the battery module 100 is provided with a first cable tie 310 and a second cable tie 320, which are distributed at intervals along the third direction Z on the first end plate 210.
  • the second reinforcing rib structures 212 are provided at the corresponding positions of the first cable tie 310 and the second cable tie 320 with the first end plate 210, thereby improving the structural strength of the mating points between the first end plate 210 and the first cable tie 310 and the second cable tie 320.
  • the first cable tie 310 and the second cable tie 320 are symmetrically arranged with respect to the center of the first reinforcing rib structure 211, that is, the second reinforcing rib structures 212 arranged on both sides of the first reinforcing rib structure 211 in the third direction Z are symmetrically arranged, so that the constraint force of the first cable tie 310 and the second cable tie 320 on the first end plate 210 is uniform, which can reduce the uneven force that may cause the first end plate 210 to fail prematurely in some areas.
  • the second reinforcing rib structure 212 includes multiple second strip reinforcing ribs 2121, which extend along the second direction Y and are distributed along the third direction Z.
  • the extending directions of the multiple second strip reinforcing ribs 2121 are parallel to the extending directions of the corresponding first cable ties 310 and second cable ties 320 on the first end plate 210, which can provide better structural strength to the positions on the first end plate 210 corresponding to the first cable ties 310 and second cable ties 320.
  • the second strip-shaped reinforcing rib 2121 can intersect and connect with the first annular reinforcing rib 2111 and the first strip-shaped reinforcing rib 2112, so that the first reinforcing rib structure 211 and the second reinforcing rib structure 212 are connected to form a whole, further improving the structural strength of the first end plate 210.
  • the first end plate 210 has fixing areas 202 on both sides along the second direction Y, and a clamping area 201 is located between the fixing areas 202.
  • the fixing areas 202 have mounting holes 215 extending in the third direction Z, and a third reinforcing rib structure 213 is provided on the fixing areas 202.
  • the position of the third reinforcing rib structure 213 on the fixing areas 202 corresponds to the mounting hole 215, that is, the third reinforcing rib structure 213 is located on the first end plate 210 at the location where the mounting hole 215 is formed.
  • the third reinforcing rib structure 213 is located between the first cable tie 310 and the second cable tie 320 along the third direction Z.
  • the structural strength of the fixing area 202 on the first end plate 210 between the first cable tie 310 and the second cable tie 320 is improved, preventing bending deformation of the fixing area 202 on the first end plate 210 between the first cable tie 310 and the second cable tie 320 when the distance between them is large.
  • the bolt needs to be pushed downwards when fastening the bolt in the mounting hole 215, the fixing area 202 will be subjected to downward pressure when fastening the bolt.
  • the structural strength of the fixing area 202 can be improved.
  • the third reinforcing rib structure 213 can be a triangular rib connecting the two sides.
  • the third reinforcing rib structure 213 can be formed by hollowing out the fixing area 202 of the first end plate 210, thereby reducing the weight of the first end plate 210.
  • the first end plate 210 is provided with a slot 216, and the first cable tie 310 and the second cable tie 320 are located in the slot 216 of the first end plate 210, forming an assembly positioning on the first end plate 210.
  • the battery module 100 further includes a second end plate 220, which is located at both ends of the battery pack 110 along the first direction X and the first end plate 210, forming a clamping effect on the battery pack 110.
  • the first end plate 210, the battery pack 110 and the second end plate 220 are tied and fixed together by the first cable tie 310 and the second cable tie 320.
  • the electrodes of multiple battery cells 111 are connected together by electrical connectors 112 to achieve series or parallel connection; the battery cells 111 located at both ends of the battery pack 110 are provided with output terminals 113 to enable the battery pack 110 to charge and discharge.
  • the second end plate 220 can be completely identical to the first end plate 210. Its specific structure and beneficial effects are detailed in the above-described embodiment of the first end plate 210 and will not be repeated here.
  • the same mold can be used during manufacturing, reducing production costs and improving production efficiency.
  • the second end plate 220 and the first end plate 210 can also be mirror-symmetrical structures, or their structures can be different; this disclosure does not impose any limitations on this.
  • first and second are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term “multiple” refers to two or more unless otherwise explicitly defined.
  • install should be interpreted broadly.
  • connect can be a fixed connection, a detachable connection, or an integral connection;
  • link can be a direct connection or an indirect connection through an intermediate medium.
  • the terms “one embodiment,” “some embodiments,” “specific embodiment,” etc. refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the claims.
  • the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.
  • the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

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Abstract

一种电池模组与用电设备，涉及储能技术领域。电池模组包括：电池组和第一端板，电池组包括沿着第一方向排列的多个电池单体；当电池模组包括多个电池组时，多个电池组沿着第二方向排列，第二方向与第一方向相交；第一端板沿第一方向位于电池组的一端，第一端板上设有与电池组数量相同的夹持区；当电池模组包括多个电池组时，多个夹持区与多个电池组一一对应设置；其中，夹持区上设有第一加强筋结构，第一加强筋结构呈网状结构，且第一加强筋结构的分布密度沿夹持区的中心区域朝向边缘区域的方向递减。本公开提供的电池模组，改善了端板的结构强度。

Description

电池模组与储能系统
相关申请的交叉引用
本公开要求2024年07月01日提交的中国专利申请号202421542737.1的优先权，在此全文引用上述中国专利申请公开的内容以作为本公开的一部分。
技术领域
本公开涉及清洁设备技术领域，具体而言，涉及一种清洁刷头与清洁设备。
背景技术
二次电池又称为充电电池或蓄电池，是指在电池放电后可通过充电的方式使活性物质激活而继续使用的电池，二次电池的可循环利用特性使其逐渐成为用电设备的主要动力来源。由于单个二次电池的电压、容量是有限的，为了满足系统的高电压和大容量要求，需要对多个电池单体进行成组，即采用若干个电池单体进行串、并联组合形成一定电压和容量的电池模组。
目前，电池单体的堆叠一般采用两块端板设于电池组堆叠方向的两端，接着采用钢扎带对端板和电池组进行捆扎，实现电池单体堆叠及限制电池模组通电运行过程中的膨胀；因此，对端板的结构强度要求较高。
需要说明的是，在上述背景技术部分公开的信息仅用于加强对本公开的背景的理解，因此可以包括不构成对本领域普通技术人员已知的现有技术的信息。
发明内容
本公开的目的在于提供一种电池模组与储能系统。
根据本公开的一个方面，提供了一种电池模组，该电池模组包括：
至少一个电池组，所述电池组包括沿着第一方向排列的多个电池单体；当所述电池模组包括多个所述电池组时，多个所述电池组沿着第二方向排列，所述第二方向与所述第一方向相交；
第一端板，所述第一端板沿所述第一方向位于所述电池组的一端，所述第一端板上设有与所述电池组数量相同的夹持区；当所述电池模组包括多个所述电池组时，多个所述夹持区与多个所述电池组一一对应设置；
其中，所述夹持区上设有第一加强筋结构，所述第一加强筋结构呈网状结构，且所述第一加强筋结构的分布密度沿所述夹持区的中心区域朝向边缘区域的方向递减。
本公开提供的电池模组，第一端板的夹持区上设有呈网状结构的第一加强筋结构，第一加强筋结构的分布密度沿夹持区的中心区域朝向边缘区域的方向递减，因此第一加强筋结构能够吸收电池组在膨胀过程中端板上的位移大小呈辐射状向外变化的膨胀力，第一加强筋结构更加贴合电池组膨胀变化规律，避免了电池单体存在失效风险；同时，有效地利用了端板的材料强度，降低了对端板材料本身的强度要求，减少了端板的材料成本。
根据本公开的另一个方面，提供了一种储能系统，该储能系统包括上述的电池模组。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本公开。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本公开的实施例，并与说明书一起用于解释本公开的原理。显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本公开的一种实施例提供的储能系统的示意图。
图2为本公开的一种实施例提供的电池模组的示意图。
图3为本公开的一种实施例提供的电池模组的爆炸图。
图4为本公开的一种实施例提供的第一端板的正面示意图。
图5为本公开的一种实施例提供的第一端板的主视图。
图6为本公开的一种实施例提供的第一端板的背面示意图。
图7为本公开的另一种实施例提供的第一端板的正面示意图。
图8为本公开的另一种实施例提供的第一端板的主视图。
图9为本公开的另一种实施例提供的第一端板的背面示意图。
图10为本公开的另一种实施例提供的第一端板的应变云图。
图11为本公开的另一种实施例提供的第一端板的位移云图。
图12为本公开的另一种实施例提供的第一端板的应力云图。
附图标记说明：
10、储能装置；20、电网；30、第一电能转换装置；40、第二电能转换装置；
100、电池模组；
110、电池组；111、电池单体；112、电连接件；113、输出端；
210、第一端板；201、夹持区；202、固定区；211、第一加强筋结构；2111、
环形加强筋；2112、第一条形加强筋；212、第二加强筋结构；2121、第二条形加强筋；213、第三加强筋结构；214、柱形加强筋；215、安装孔；216、卡槽；220、第二端板；
310、第一扎带；320、第二扎带。
具体实施方式
现在将参考附图更全面地描述示例实施方式。然而，示例实施方式能够以多种形式实施，且不应被理解为限于在此阐述的实施方式；相反，提供这些实施方式使得本公开将全面和完整，并将示例实施方式的构思全面地传达给本领域的技术人员。图中相同的附图标记表示相同或类似的结构，因而将省略它们的详细描述。
由于人们所需要的能源都具有很强的时间性和空间性，为了合理利用能源并提高能量的利用率，需要通过一种介质或者设备，把一种能量形式用同一种或者转换成另外一种能量形式存储起来，再基于未来应用需要以特定的能量形式释放出来。众所周知，要实现碳中和的大目标，目前主要通过绿色能源替代化石能源，达到产生绿色电能的目的。
目前的绿色能源主要包括光能、风能、水势等，而光能和风能等普遍存在间歇性强、波动性大的问题，会造成绿色电网的电压不稳定(用电高峰时电不够，用电低谷时电太多)，而不稳定的电压会对电力造成损害，因此可能因为用电需求不足或电网接纳能力不足，引发“弃风弃光”问题。
而要解决用电需求不足或电网接纳能力不足的问题，就必须依赖储能装置。即通过储能装置将电能通过物理或者化学的手段转化为其他形式的能量存储起来，需要的时候再将储能装置存储的能量转化为电能释放出来，简单来说，储能装置就类似一个大型“充电宝”，在光能、风能充足时，将电能储存起来，需要时再释放存储的电能。
目前的储能(即能量存储)应用场景较为广泛，包括发电侧储能、电网侧储能、可再生能源并网储能以及用户侧储能等方面，对应的储能装置的种类包括有：
(1)应用在风电、光伏电站等发电侧储能场景的大型储能电站，其可以协助可再生能源发电满足并网要求，同时提高可再生能源利用率；储能电站作为电源侧中优质的有功/无功调节电源，实现电能在时间和空间上的负荷匹配，增强可再生能源消纳能力，减少瞬时功率变化，减少对电网的冲击，改善新能源发电消纳问题，并在电网系统备用、缓解高峰负荷供电压力和调峰调频方面意义重大；
(2)应用在电网侧储能场景的大型储能集装箱，功能主要为调峰、调频、缓解电网阻塞调峰方面，可实现对用电负荷的削峰填谷，即在用电负荷低谷时对储能电池充电，在用电负荷高峰时段将存储的电量释放，从而实现电力生产和消纳之间的平衡，例如储能电站系统；
(3)应用在用户侧的工商业储能场景(银行、商场等)的中小型储能电柜以及应用在用户侧的家庭储能场景的户用小型储能箱，功能主要为电力自发自用、削峰填谷、容量费用管理以及提高供电可靠性。根据应用场景的不同，用电侧储能可以分为工商业储能柜、户用储能装置、储能充电桩等，其一般与分布式光伏配套使用。由于根据用电量需求在峰谷位置的电费存在较大的价格差异，用户有储能装置后，为了减少成本，通常在电价低谷期，对储能柜/箱进行充电处理；电价高峰期，再将储能设备中的电放出来进行使用，以达到节省电费的目的。另外，通信基站、数据中心等领域需要配置储能，用于备用电源。此外，在边远地区，以及地震、飓风等自然灾害高发的地区，家用储能装置的存在，相当于用户为自己和电网提供了备用电源，免除由于灾害或其他原因导致的频繁断电带来的不便。
图1为本公开的实施例提供的储能系统的示意图，且本公开图1实施例以发/配电侧共享储能场景为例进行说明，本公开储能系统并不限定于其发/配电侧储能场景，还可以应用于工商业侧或用户侧等场景中。
如图1所示，储能系统包括：储能装置10、电网20、第一电能转换装置30、第二电能转换装置40。在发电情况下，第一电能转换装置30及第二电能转换装置40用于将其它形式的能源转换为电能，与电网20连接，供给配网用电侧使用；当用电负荷较低，第一电能转换装置30、第二电能转换装置40发电过剩时，将多发的电量储存至储能装置10，减少弃风、弃光率，改善新能源发电消纳问题；在用电负荷高位时，电网下达指令，将储能装置10储存的电量协同电网20采用并网模式传输电能供给用电侧使用，为电网运行提供调峰、调频、备用等多种服务，充分发挥电网20调峰的作用，促进电网20削峰填谷，缓解电网20供电压力。
其中，第一电能转换装置30可为太阳能转换装置，第二电能转换装置40可为风能转换装置；当然，电能转换装置还可为将热能、潮汐能、生物质能及机械能等中的至少一种转换为电能的装置。
而结合上述所述的通过物理或者电化学的手段进行能量存储的情况，以电化学储能为例，储能装置10包括至少一组化学电池，利用化学电池内的化学元素做储能介质，以通过储能介质的化学反应或者变化实现充放电的过程。简单来说就是把光能、风能产生的电能通过储能介质的化学反应或者变化存在至少一组化学电池中，在外部电能的使用达到高峰时再通过储能介质的化学反应或者变化将至少一组化学电池存储的电量释放出来使用，或者转移给电量紧缺的地方再使用。
该储能装置可包括电池模组。电池模组中包括多个电池单体，多个电池单体在固定时，可在两端装配端板，通过端板与扎带将多个电池单体捆扎在一起；电池单体可以为锂离子二次电池、锂硫电池、钠锂离子电池、钠离子电池、镁离子电池等，电池单体可呈圆柱体、扁平体、长方体等，本申请实施方式对此不做限定。
在相关技术中，常见的端板在设计上没最大程度上利用结构去有效利用材料特性，无法完全吸收电芯膨胀的力，导致端板失效，此时并没有达到材料极限，而且成本较高。
针对上述技术问题，本公开的实施方式提供了一种电池模组，如图2～图5所示，电池模组100包括至少一个电池组110和第一端板210，电池组110包括沿着第一方向X排列的多个电池单体111；当电池模组100包括多个电池组110时，多个电池组110沿着第二方向Y排列，第二方向Y与第一方向X相交；第一端板210沿第一方向X位于电池组110的一端，第一端板210上设有与电池组110数量相同的夹持区201；当电池模组100包括多个电池组110时，多个夹持区201与多个电池组110一一对应设置。
其中，夹持区201上设有第一加强筋结构211，第一加强筋结构211呈网状结构，且在夹持区201上第一加强筋结构211的分布密度沿夹持区201的中心区域朝向边缘区域的方向递减。
需要说明的是，网状结构的第一加强筋结构211可包括多个交叉连接的加强筋，网状结构的第一加强筋结构211的分布密度反应的是多个加强筋在第一端板210上分布的疏密程度，可以通过在第一端板210上的单位面积内的分布数量反应分布密度。例如，第一加强筋结构211的分布密度可以是，在第一端板210的夹持区201上分布有多个加强筋的区域，单位面积内分布的加强筋的数量，可以表示为多个加强筋的数量与分布有多个加强筋的区域的面积的比值；当一单位面积内第一加强筋结构211中加强筋的数量大于另一单位面积内第一加强筋结构211中加强筋的数量，则认定该单位面积内第一加强筋结构211的分布密度大于另一面积内第一加强筋结构211的分布密度；同时，第一加强筋结构211的分布密度也可通过多个加强筋之间的平均距离来反应分布密度，例如多个加强筋中，两两之间的距离的平均值就是平均距离，该平均距离越大，表示多个加强筋分布的越稀疏，该平均距离越小，表示多个加强筋分布的越密集。当一单位面积内第一加强筋结构211中相邻的两个加强筋之间的平均距离小于另一单位面积内第一加强筋结构211中相邻的两个加强筋之间的平均距离，则认定该单位面积内第一加强筋结构211的分布密度大于另一面积内第一加强筋结构211的分布密度。其中，当通过单位面积内加强筋的数量和相邻的两个加强筋之间的距离大小判定分布密度时，多个加强筋的宽度可相同或基本相同。
本公开提供的电池模组100，第一端板210的夹持区201上设有呈网状结构的第一加强筋结构211，且在夹持区201上第一加强筋结构211的分布密度沿夹持区201的中心区域朝向边缘区域的方向递减，因此第一加强筋结构211能够吸收电池组110在膨胀过程中第一端板210上的位移大小呈辐射状向外变化的膨胀力，第一加强筋结构211更加贴合电池组110膨胀变化规律，避免了电池单体111存在失效风险；同时，有效地利用了第一端板210的材料强度，降低了对第一端板210材料本身的强度要求，减少了第一端板210的材料成本。
在一个实施例中，电池组110中多个电池单体111沿第一方向X的堆叠方向垂直于电池单体111的大面。通过多个电池单体111的堆叠方向垂直于电池单体111的大表面，能够使多个电池单体111堆叠后所占用的空间较小。电池单体111的大表面可以认为是电池单体111面积最大的表面，进一步的，电池单体111的大表面可以认为是电池单体111产热最大的表面，例如，电池单体111为方形电池时，电池单体111包括两个相对的大表面。
其中，电池单体111包括电芯和电解质，能够进行诸如充电/放电的电化学反应的最小单元。电池单体111的电芯是指将堆叠部卷绕或层压形成的单元，该堆叠部包括第一电极、分隔物以及第二电极。当第一电极为正电极时，第二电极为负电极。其中，第一电极和第二电极的极性可以互换。电芯设置在电池单体111的电池壳体内。
其中，电池单体111可以为卷绕式电池，即将第一极片、与第一极片电性相反的第二极片以及设置在第一极片和第二极片之间的隔膜片进行卷绕，得到卷绕式电芯。当然，电池单体111也可为叠片式电池，不仅成组方便，且可以加工得到长度较长的电池。具体的，电芯为叠片式电芯，电芯具有相互层叠的第一极片、与第一极片电性相反的第二极片以及设置在第一极片和第二极片之间的隔膜片，从而使得多对第一极片和第二极片堆叠形成叠片式电芯。
其中，电池单体111可以是方形电池，即电池单体111可以是四棱柱电池，四棱柱型电池主要是指外形为棱柱形状，但不严格限定棱柱每条边是否一定为严格意义的直线，边与边之间的拐角不一定为直角，可以为圆弧过渡。当然，电池单体111可以为圆柱电池，本公开对此不做限制。
在一个实施例中，如图2～图5所示，电池模组100包括一个电池组110，第一端板210上匹配的设有一个夹持区201；下面，本申请以电池模组100包括一个电池组110，第一端板210上匹配设有一个夹持区201为示例，对第一端板210的结构进行详细地介绍。
在一个实施例中，如图3～图6所示，第一加强筋结构211设于第一端板210上背离电池组110的表面上，第一端板210朝向电池组110的表面为平整的光滑表面，即第一端板210夹持固定电池组110一面为光滑表面，能够对电池组110提供更好的夹持作用；同时，第一加强筋结构211朝向外侧，能够通过第一加强筋结构211提升第一端板210的散热能力，避免第一端板210结构强度受高温影响过多。
当然，第一加强筋结构211也可设于第一端板210上朝向电池组110的表面上；此时，第一端板210与电池组110之间还可单独设置另一垫板，电池组110产生的膨胀力通过垫板传递至第一端板210上。另外，第一端板210相反的两面上均可设置第一加强筋结构211，本公开对此不做限制。
在一个实施例中，第一加强筋结构211包括多个直径不同的环形加强筋2111，多个环形加强筋2111同心设置。在电池单体111组成的电池组110在膨胀过程中，第一端板210上的位移大小呈椭圆辐射状向外变化；通过在第一端板210上设置多个环形加强筋2111，能够针对性的根据第一端板210上位移大小呈椭圆辐射状向外变化的规律提高第一端板210上的结构强度。
其中，如图4和图5所示，在夹持区201的中心区域朝向边缘区域的方向上，至少部分相邻的两个环形加强筋2111之间的间距递增。通过使相邻的两个环形加强筋2111之间的间距递增，即第一加强筋结构211的分布密度沿夹持区201的中心区域朝向边缘区域的方向递减，以吸收电池组110在膨胀过程中端板上的位移大小呈辐射状向外变化的膨胀力；同时，有效地利用了端板的材料强度，降低了对端板材料本身的强度要求。
其中，例如仿真云图位移界限距离力的中心分别为50.0mm、70.9mm、89.1mm，105.0mm，可以根据这些参数对第一端板210的圆弧直径进行设计。根据不同的电池组110，可以采用该规律去优化端板。
在一个实施例中，如图4和图5所示，第一加强筋结构211还包括多个第一条形加强筋2112，多个第一条形加强筋2112以环形加强筋2111的圆心为中心点呈放射状分布。通过多个第一条形加强筋2112与多个第一环形加强筋2111配合，形成了类似米字分散式加强筋，确保第一端板210在各个方向上有足够的强度去支撑电池组110，以去分散整个电池组110的膨胀力。
其中，如图5所示，在环形加强筋2111的周向上，相邻的两个第一条形加强筋2112之间夹角的角度相同，即多个第一条形加强筋2112均匀分布，能够进一步的有效分散整个电池组110的膨胀力。
其中，第一环形加强筋2111例如可设置四个，四个直径不同的第一环形加强筋2111同心套设，相邻的两个第一环形加强筋2111的间距在第一端板210的中心区域朝向边缘区域方向上的间距递增。第一条形加强筋2112可设置十二个，十二个第一条形加强筋2112以第一环形加强筋2111的圆点为中心放射状均匀分布，从而确保第一端板210在各个方向上有足够的强度去支撑，去分散整个电池组110的膨胀力。
当然，第一环形加强筋2111的数量还可为两个、三个、五个或更多个，部分相邻的两个第一环形加强筋2111的间距在第一端板210的中心区域朝向边缘区域方向上的间距递增，部分相邻的两个第一环形加强筋2111的间距在第一端板210的中心区域朝向边缘区域方向上的间距也可相同；第一条形加强筋2112的数量可为两个、三个、四个或更多个，部分相邻的两个第一条形加强筋2112之间夹角的角度相同，部分相邻的两个第一条形加强筋2112之间夹角的角度也可不同，本公开对此不做限制。
在一个实施例中，如图5所示，夹持区201上还设有至少一个柱形加强筋214，至少部分第一条形加强筋2112与环形加强筋2111相交的位置通过柱形加强筋214连接。一方面，通过在第一条形加强筋2112与环形加强筋2111相交的位置通过柱形加强筋214连接，分散了第一条形加强筋2112与环形加强筋2111相交的位置应力，避免第一条形加强筋2112与环形加强筋2111相交的位置处受到电池组110膨胀力后产生破裂，提升拉力第一条形加强筋2112与环形加强筋2111相交的位置结构强度。另一方面，通过设置柱形加强筋214，还可用作第一端板210装配时与工装抵接的位置；工装抵接在柱形加强筋214的位置，接着将堆叠在一起的第一端板210和电池组110用扎带捆紧，然后再撤出工装，提升了第一端板210的装配效率和装配精度。
其中，柱形加强筋214可沿第二方向Y设置有两个，两个柱形加强筋214对称设置。当然，柱形加强筋214也可设置三个、四个或更多个，多个柱形加强筋214沿第二方向Y或第三方向Z对称设置。第三方向Z与第一方向X及第二方向Y相交，优选地，第三方向Z与第一方向X及第二方向Y垂直，第一方向X与第二方向Y垂直，即第一方向X为第一端板210的厚度方向，第二方向Y为第一端板210的宽度方向，第三方向Z为第一端板210的高度方向。
在一个实施例中，如图5所示，第一加强筋结构211沿第二方向Y为对称结构。通过使第一加强筋结构211沿第二方向Y为对称结构，能够在第二方向Y上均匀地分散整个电池组110的膨胀力。
其中，如图5所示，在第三方向Z上，第一加强筋结构211为对称结构。通过使第一加强筋结构211沿第三方向Z为对称结构，能够在第三方向Z上均匀地分散整个电池组110的膨胀力。
在一个实施例中，第一端板210包括本体部和第一加强筋结构211，本体部上设有与电池组110数量一致的夹持区201，第一加强筋结构211位于夹持区201的表面上，即第一加强筋结构211为第一端板210表面上单独设置的结构，第一端板210的本体本身没有结构上的变换，使得第一端板210的本体保持了原有的结构强度，通过增加的第一加强筋结构211增加了第一端板210的结构强度。
其中，第一加强筋结构211与本体部可为一体式结构，例如通过注塑或铸造工艺一体形成。当然，第一加强筋结构211与本体部也可为通过焊接、粘接等方式固定连接。
其中，第一端板210的可为金属材质、塑性材质或复合材质，通过第一加强筋结构211的设置，能够充分利用材质自身的属性，降低对材质本身的强度要求。
在一个实施例中，如图7和图8所示，夹持区201上还设有第二加强筋结构212，在与第一方向X及第二方向Y相交的第三方向Z上，第二加强筋结构212分布在第一加强筋结构211的两侧。由于第一端板210在第三方向Z上的高度尺寸大于在第二方向Y上的宽度尺寸，第一端板210受力云图为椭圆形，即第一端板210的上下两侧受到的膨胀力相对较大；如图10～图12所示，第一端板210采用PA5T塑料材质(80％)，电池模组100在进行35000N膨胀力仿真分析时，第一端板210的最大应变为0.067％，第一端板210的最大位移为7.422mm，第一端板210的最大应力为153.596MPa。第一端板210的材料PA5T塑料的断裂伸长率为3.2％，可以看出，减少了第一端板210上的应力集中，使得第一端板210的受力更加均匀，第一端板210的强度满足电池组110的膨胀力要求，即通过在第一加强筋结构211第三方向Z的两侧设置第二加强筋结构212，能够提升第一端板210的上下两侧的结构强度，从而减少应力集中。
其中，如图3所示，电池模组100上设有第一扎带310和第二扎带320，第一扎带310和第二扎带320沿第三方向Z间隔分布在第一端板210上。通过在第一端板210上第一加强筋结构211的第三方向Z两侧设置第二加强筋结构212，使第一扎带310和第二扎带320与第一端板210对应位置处设有第二加强筋结构212，以提升第一端板210与第一扎带310及第二扎带320配合处的结构强度。
其中，在第三方向Z上，第一扎带310和第二扎带320相对第一加强筋结构211的中心对称设置，即第一加强筋结构211的第三方向Z两侧设置的第二加强筋结构212对称设置，以使第一端板210受到的第一扎带310和第二扎带320约束力是均匀的，能够减少力的不均匀导致第一端板210局部提前失效。
其中，如图7和图8所示，第二加强筋结构212包括多个第二条形加强筋2121，多个第二条形加强筋2121沿第二方向Y延伸，沿第三方向Z分布。多个第二条形加强筋2121的延伸方向与对应的第一扎带310和第二扎带320在第一端板210上的延伸方向平行，能够对第一端板210上与第一扎带310和第二扎带320对应的位置提供更好的结构强度。
其中，第二条形加强筋2121可与第一环形加强筋2111和第一条形加强筋2112相交连接，以使第一加强筋结构211和第二加强筋结构212连接形成一个整体，进一步提高对第一端板210的结构强度提升。
在一个实施例中，如图7～图9所示，第一端板210沿第二方向Y的两侧设有固定区202，夹持区201位于固定区202之间；固定区202中设有在第三方向Z上延伸的安装孔215，固定区202上设有第三加强筋结构213，第三加强筋结构213在固定区202上的位置与安装孔215对应设置，即第三加强筋结构213位于第一端板210形成安装孔215的部位上。通过在固定区202上与安装孔215对应的位置上设置第三加强筋结构213，能够加强固定区202的强度，从而提升第一端板210装配固定时的可靠性。
其中，第三加强筋结构213沿第三方向Z位于第一扎带310与第二扎带320之间。一方面，通过使第三加强筋结构213沿第三方向Z位于第一扎带310与第二扎带320之间，提升了第一扎带310与第二扎带320之间的第一端板210上固定区202的结构强度，避免第一扎带310与第二扎带320之间间距较大时，第一扎带310与第二扎带320之间的第一端板210上的固定区202出现弯曲变形。另一方面，由于安装孔215中锁付螺栓时需要将螺栓向下抵，因此当锁付螺栓时固定区202会受到下压的力，通过设置第三加强筋结构213，能够提高固定区202的结构强度。
其中，如图7～图9所示，第三加强筋结构213可为连接两个侧面的三角形肋片。可通过在第一端板210的固定区202上镂空处理形成第三加强筋结构213，从而减轻第一端板210的重量。
其中，第一端板210上设有卡槽216，第一扎带310与第二扎带320位于第一端板210的卡槽216中，形成在第一端板210上的装配定位。
在本公开的一种实施例中，如图2和图3所示，电池模组100还包括：第二端板220，第二端板220沿第一方向X与第一端板210位于电池组110的两端，形成对电池组110的夹持，通过第一扎带310和第二扎带320，将第一端板210、电池组110与第二端板220捆扎固定在一起。
其中，电池组110中多个电池单体111之间的电极通过电连接件112连接在一起，实现串联或并联；位于电池组110两端的电池单体111上设有输出端113，以使电池组110进行充放电。
其中，第二端板220与第一端板210可完全相同，其具体结构和有益效果参照上述第一端板210实施例中的详细论述，在此不再赘述。通过使第二端板220与第一端板210可完全相同，在进行生产制造时，可采用同一模具，降低了生产成本，提高了生产效率。当然，第二端板220与第一端板210也可为镜像对称结构，或第二端板220与第一端板210的结构不同，本公开对此不做限制。
本申请实施例中，术语“第一”、“第二”仅用于描述的目的，而不能理解为指示或暗示相对重要性；术语“多个”则指两个或两个以上，除非另有明确的限定。术语“安装”、“相连”、“连接”、“固定”等术语均应做广义理解，例如，“连接”可以是固定连接，也可以是可拆卸连接，或一体地连接；“相连”可以是直接相连，也可以通过中间媒介间接相连。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在申请实施例中的具体含义。
本申请实施例的描述中，需要理解的是，术语“上”、“下”、“左”、“右”、“前”、“后”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述申请实施例和简化描述，而不是指示或暗示所指的装置或单元必须具有特定的方向、以特定的方位构造和操作，因此，不能理解为对申请实施例的限制。
在本说明书的描述中，术语“一个实施例”、“一些实施例”、“具体实施例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或特点包含于申请实施例的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或实例。而且，描述的具体特征、结构、材料或特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
以上仅为本申请实施例的优选实施例，并不用于限制申请实施例，本领域技术人员在考虑说明书及实践这里公开的实施例后，将容易想到本公开的其它实施方案。本申请旨在涵盖本公开的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本公开的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本公开的真正范围和精神由所附的权利要求指出。

Claims (16)

  1. 一种电池模组，包括：
    至少一个电池组，所述电池组包括沿着第一方向排列的多个电池单体；当所述电池模组包括多个所述电池组时，多个所述电池组沿着第二方向排列，所述第二方向与所述第一方向相交；
    第一端板，所述第一端板沿所述第一方向位于所述电池组的一端，所述第一端板上设有与所述电池组数量相同的夹持区；当所述电池模组包括多个所述电池组时，多个所述夹持区与多个所述电池组一一对应设置；
    其中，所述夹持区上设有第一加强筋结构，所述第一加强筋结构呈网状结构，且所述第一加强筋结构的分布密度沿所述夹持区的中心区域朝向边缘区域的方向递减。
  2. 如权利要求1所述的电池模组，其中，所述第一加强筋结构包括多个直径不同的环形加强筋，多个所述环形加强筋同心分布。
  3. 如权利要求2所述的电池模组，其中，在所述夹持区的中心区域朝向边缘区域的方向上，至少部分相邻的两个所述环形加强筋之间的间距递增。
  4. 如权利要求2所述的电池模组，其中，所述第一加强筋结构还包括多个第一条形加强筋，所述多个第一条形加强筋以所述环形加强筋的圆心为中心点呈放射状分布。
  5. 如权利要求4所述的电池模组，其中，在所述环形加强筋的周向上，相邻的两个所述第一条形加强筋之间夹角的角度相同。
  6. 如权利要求4所述的电池模组，其中，所述夹持区上还设有至少一个柱形加强筋，至少部分所述第一条形加强筋与所述环形加强筋相交的位置通过所述柱形加强筋连接。
  7. 如权利要求1～6任一项所述的电池模组，其中，所述第一加强筋结构沿所述第二方向为对称结构。
  8. 如权利要求7所述的电池模组，其中，在与所述第一方向及所述第二方向相交的第三方向上，所述第一加强筋结构为对称结构；所述第一方向与所述第二方向及所述第三方向之间相互垂直。
  9. 如权利要求1～6任一项所述的电池模组，其中，所述第一加强筋结构位于所述第一端板上背离所述电池组的一侧。
  10. 如权利要求9所述的电池模组，其中，所述第一端板包括本体部和所述第一加强筋结构，所述本体部上设有与所述电池组数量一致的夹持区，所述第一加强筋结构位于所述夹持区的表面上。
  11. 如权利要求1～6任一项所述的电池模组，其中，所述夹持区上还设有第二加强筋结构，在与所述第一方向及所述第二方向相交的第三方向上，所述第二加强筋结构分布在所述第一加强筋结构的两侧。
  12. 如权利要求11所述的电池模组，其中，所述第二加强筋结构包括多个第二条形加强筋，所述多个第二条形加强筋沿所述第二方向延伸，沿所述第三方向分布。
  13. 如权利要求1～6任一项所述的电池模组，其中，所述第一端板沿所述第二方向的两侧设有固定区，所述夹持区位于所述固定区之间；所述固定区中设有在与所述第一方向及所述第二方向相交的第三方向上延伸的安装孔，所述固定区上与所述安装孔位置对应的位置上设有第三加强结构。
  14. 如权利要求13所述的电池模组，其中，所述电池模组还包括第一扎带和第二扎带，所述第一扎带与所述第二扎带被配置为捆扎所述至少一个电池组与所述第一端板；所述第三加强结构沿所述第三方向位于所述第一扎带与所述第二扎带之间。
  15. 如权利要求1～6任一项所述的电池模组，其中，所述电池模组还包括：
    第二端板，所述第二端板沿所述第一方向与所述第一端板位于所述电池组的两端，所述第二端板与所述第一端板的结构相同。
  16. 一种储能系统，包括权利要求1～15任一项所述的电池模组。
PCT/CN2025/103997 2024-07-01 2025-06-26 电池模组与储能系统 Pending WO2026007809A1 (zh)

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