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
  • 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
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M10/00—Secondary cells; Manufacture thereof
  • H01M10/60—Heating or cooling; Temperature control
  • H01M10/65—Means for temperature control structurally associated with the cells
  • H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
• • 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
  • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
• • 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
• • 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 application relates to the field of battery technology, specifically to a battery pack.
• the discharge end of the battery cell is generally covered with a resin plate by design, which serves to provide insulation, flame retardancy, and improve rigidity.
• This application provides a battery pack, including:
• the outer shell has a receiving cavity
• the battery pack is housed within the receiving cavity
• a reinforcing layer is disposed at the discharge end of the battery pack, and the reinforcing layer has channel holes;
• the adhesive is used to fill the cavity and covers the reinforcing layer and battery pack.
• the beneficial effects of the battery pack provided in this application are as follows: by fixing the reinforcing layer and the battery pack with adhesive, not only can the fixing structure of the reinforcing layer be eliminated, reducing the design difficulty of the battery pack and simplifying the assembly process of the battery pack, improving manufacturing efficiency and reducing costs, but also the fixing effect of the reinforcing layer and the battery pack can be improved by fixing the reinforcing layer and the battery pack from all directions with adhesive; furthermore, by setting channel holes in the reinforcing layer, adhesive can enter the gap between the reinforcing layer and the battery pack through the channel holes, thereby making the adhesive fill more fully and evenly, and making the performance of the battery pack more stable.
• Figure 1 is a cross-sectional view of the battery pack provided in one embodiment of this application in the first section.
• Figure 2 is a cross-sectional view of the battery pack provided in one embodiment of this application in a second section perpendicular to the first section.
• Figure 3 is a schematic diagram of the planar structure of the reinforcing layer in Figure 1;
• Figure 4 is a schematic diagram of the process of injecting fixative into the shell shown in Figure 2;
• FIG. 5 is a cross-sectional schematic diagram of a battery pack provided in another embodiment of this application.
• FIG. 6 is a flowchart of the manufacturing method of the battery pack provided in this application.
• Figure 1 is a cross-sectional view of a battery pack 100 provided in an embodiment of this application in a first section
• Figure 2 is a cross-sectional view of a battery pack 100 provided in an embodiment of this application in a second section perpendicular to the first section.
• This application provides a battery pack 100, which includes a shell 10, a battery pack 20, a reinforcing layer 30, and a fixing adhesive 40.
• the shell 10 has a receiving cavity 12; the battery pack 20 is disposed in the receiving cavity 12; the reinforcing layer 30 is disposed at the discharge end of the battery pack 20, and the reinforcing layer 30 has channel holes 32; the fixing adhesive 40 fills the receiving cavity 12, and the fixing adhesive 40 covers the reinforcing layer 30 and the battery pack 20.
• the hollow interior of the outer casing 10 forms a receiving cavity 12 with at least one opening.
• the battery pack 20 can be directly placed in the receiving cavity 12 or fixedly mounted in the receiving cavity 12 by a fixing structure.
• the battery pack 20 includes multiple cells arranged in an array. These cells can be connected in series, parallel, or a series-parallel connection.
• the cells can be lithium batteries, sodium batteries, lead-acid batteries, etc., and are used to store and release electrical energy.
• a reinforcing layer 30 is disposed at the discharge end of the battery pack 20, which can improve the rigidity of the battery pack 20 and also serve as insulation and flame retardant.
• a fixing adhesive 40 fills the receiving cavity 12, covering the reinforcing layer 30 and the battery pack 20.
• the reinforcing layer 30 and the battery pack 20 are fixed using adhesive 40.
• adhesive 40 This not only eliminates the need for a separate fixing structure for the reinforcing layer 30, reducing the design complexity of the battery pack 100 and simplifying the assembly process, thus improving manufacturing efficiency and reducing costs, but also enhances the fixing effect by using adhesive 40 to fix the reinforcing layer 30 and the battery pack 20 from all directions.
• the adhesive 40 can enter the gap between the reinforcing layer 30 and the battery pack 20 through the channel holes 32, thereby allowing the adhesive 40 to fill the gap more fully and evenly, resulting in more stable performance of the battery pack 100.
• the outer casing 10 includes a housing 14 and a top cover 50.
• the top cover 50 is connected to the housing 14 to form a receiving cavity 12, and a reinforcing layer 30 is disposed between the battery pack 20 and the top cover 50.
• an opening for a receiving cavity 12 is formed on the top of the housing 14, and a top cover 50 is placed over the opening of the receiving cavity 12 to seal the receiving cavity 12.
• the reinforcing layer 30 can be made of at least one of fiberglass cloth, carbon fiber cloth, and aramid cloth. Using materials such as fiberglass cloth instead of resin board can effectively reduce costs.
• fiberglass cloth can be selected as the reinforcing layer 30.
• the fiberglass cloth can be stacked on the discharge end of the battery pack 20, and colloid can be filled into the receiving cavity 12 of the outer casing 10. After the colloid solidifies, it forms a fixing adhesive 40 covering the reinforcing layer 30 and the battery pack 20. Since the fiberglass cloth covered by the fixing adhesive 40 has high strength, it can be used to improve the rigidity of the battery pack 100.
• any two of the following materials, glass fiber cloth, carbon fiber cloth, and aramid cloth, can be used as the reinforcing layer 30, or glass fiber cloth, carbon fiber cloth, and aramid cloth can be used as the reinforcing layer 30 to meet different performance requirements.
• the cell encapsulation process typically uses foamed adhesive to encapsulate the battery pack 100. Therefore, in this embodiment, the material of the fixing adhesive 40 can be made of foamed adhesive. In this way, the foamed adhesive encapsulation process in related technologies can be used to simplify the structural design and assembly process of the battery pack 100.
• Figure 3 is a planar structural schematic of the reinforcing layer 30 in Figure 1
• Figure 4 is a schematic diagram of the process of injecting the fixing adhesive 40 into the outer shell 10 in Figure 2.
• the reinforcing layer 30 includes multiple horizontal portions 31 and multiple vertical portions 33, which are arranged intersectingly. Each pair of horizontal portions 31 and each pair of vertical portions 33 forms a channel hole 32 as shown in the black area in Figure 3.
• the design of the channel hole 32 provides a penetration channel for the fixing adhesive 40.
• the fixing adhesive 40 After the fixing adhesive 40 enters the side of the fiberglass cloth facing the battery pack 20, it can completely wrap the fiberglass cloth. At this time, the fiberglass cloth acts as a skeleton, which can improve the rigidity of the battery pack 100, and the fixing adhesive 40 can stably fix the fiberglass cloth to the battery pack 20.
• the horizontal portion 31 and the vertical portion 33 can be arranged to be perpendicular to each other.
• the force can be evenly distributed in two mutually perpendicular directions, avoiding stress concentration.
• the horizontal portion 31 and the vertical portion 33 may be set at a certain angle.
• the angle between the horizontal portion 31 and the vertical portion 33 may be set to 30°, 45°, 60° or 75°, etc.
• the specific angle can be flexibly set according to the requirements. This application embodiment does not make specific limitations.
• the width of the channel hole 32 can be set to L mm, where L ⁇ 1.
• the width of the channel hole 32 specifically refers to the gap length between two adjacent horizontal portions 31 or between two adjacent vertical portions 33.
• the width of the channel hole 32 specifically refers to the smaller one.
• the width of the channel hole 32 By setting the width of the channel hole 32 to be greater than or equal to 1 mm, not only can the rigidity of the reinforcing layer 30 be guaranteed, but also the fluidity of the fixing adhesive 40 within the channel hole 32 can be guaranteed, facilitating the entry of the fixing adhesive 40 into the side of the reinforcing layer 30 facing the battery pack 20.
• the width of the channel hole 32 can be set to, for example, 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, 2 mm, 2.5 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, or 10 mm, etc., and will not be listed here one by one.
• the thickness of the reinforcing layer 30 can be set to T millimeters, where 1 ⁇ T ⁇ 2.
• the thickness of the reinforcing layer 30 refers to its height perpendicular to the plane in which it is located. Since the thickness of the reinforcing layer 30 is greater than or equal to 1 millimeter and less than or equal to 2 millimeters, the reinforcing layer 30 can have a relatively thick thickness. This not only allows the reinforcing layer 30 to have high strength after being wrapped by the fixing adhesive 40, but also fills the gap between the top cover 50 of the outer casing 10 and the battery pack 20.
• the thickness of the reinforcing layer 30 can be set to, for example, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, or 2 mm, etc., which will not be listed here.
• the number of reinforcing layers 30 can be set to two or three. Two or three reinforcing layers 30 are stacked at the discharge end of the battery pack 20, and the channel holes 32 on the reinforcing layers 30 are interconnected. Thus, by stacking different numbers of reinforcing layers 30, the reinforcing layers 30 can have different rigidities and can reasonably fill the gap between the top cover 50 and the battery pack 20, simplifying the design of the battery pack 100 and improving assembly efficiency.
• the battery pack 100 has two reinforcing layers 30, which are stacked on top of each other, and the channel holes 32 provided on the two reinforcing layers 30 are aligned with each other so that the channel holes 32 on the two reinforcing layers 30 are interconnected, so that the fixing adhesive 40 can flow in the channel holes 32.
• the thickness of the reinforcing layer 30 can be greater than or equal to 1 mm and less than or equal to 2 mm, this application can make the reinforcing layer 30 have a thicker thickness, thereby reducing the number of reinforcing layers 30 stacked together and avoiding interlayer separation between adjacent reinforcing layers 30.
• the battery pack 100 may also include a connector 60, which connects two or three reinforcing layers 30.
• the connector 60 can fix multiple reinforcing layers 30 into an integral structure, preventing interlayer separation caused by the movement of adjacent reinforcing layers 30, thereby improving the structural stability of the multiple reinforcing layers 30.
• the connector 60 can be a screw, which is inserted into the reinforcing layer 30 to connect adjacent reinforcing layers 30.
• the connector 60 can be double-sided adhesive, which is sandwiched between adjacent reinforcing layers 30 to bond them together.
• Other commonly used connection structures can also be used for the connector 60, which are not specifically limited here.
• the manufacturing method of the battery pack 100 includes:
• Step S10 Place the battery pack 20 into the receiving cavity 12 of the outer casing 10.
• multiple battery cells are first connected together in series, parallel or series-parallel to form a battery pack 20. Then, the battery pack 20 is placed in the receiving cavity 12 of the outer casing 10 through the opening, wherein the discharge end of the battery pack 20 is placed facing the opening.
• Step S20 Place the reinforcing layer 30 at the discharge end of the battery pack 20.
• the reinforcing layer 30 is laid flat directly on the discharge end of the battery pack 20. If multiple reinforcing layers 30 are required, they can be stacked sequentially, with the channel holes 32 on each reinforcing layer 30 aligned with each other. If multiple reinforcing layers 30 need to be connected using connectors 60, they can be connected first using connectors 60 before being placed on the discharge end of the battery pack 20.
• Step S30 Inject fixative 40 into the receiving cavity 12 until the fixative 40 covers the reinforcing layer 30 and the battery pack 20.
• the fixing adhesive 40 is injected into the receiving cavity 12 through the opening of the receiving cavity 12. Part of the fixing adhesive 40 enters the receiving cavity 12 through the gap between the outer shell 10 and the battery pack 20, and another part enters the gap between the battery pack 20 and the reinforcing layer 30 through the channel hole 32 shown in Figure 4, thereby completely wrapping the battery pack 20 and the reinforcing layer 30.
• the present application embodiment uses adhesive 40 to fix the reinforcing layer 30 and the battery pack 20.
• This not only eliminates the need for a separate fixing structure for the reinforcing layer 30, reducing the design difficulty of the battery pack 100 and simplifying the assembly process of the battery pack 100, thus improving manufacturing efficiency and reducing costs, but also improves the fixing effect of the reinforcing layer 30 and the battery pack 20 by fixing them from all directions with adhesive 40.
• adhesive 40 can enter the gap between the reinforcing layer 30 and the battery pack 20 through the channel holes 32, thereby making the adhesive 40 fill the gap more fully and evenly, and making the performance of the battery pack 100 more stable.

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Electrochemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Battery Mounting, Suspending (AREA)
• Connection Of Batteries Or Terminals (AREA)

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• 2024
  • 2024-04-30 CN CN202420950380.4U patent/CN222654235U/zh active Active
  • 2024-06-12 WO PCT/CN2024/098619 patent/WO2025227463A1/zh active Pending
  • 2024-09-10 EP EP24199501.8A patent/EP4645526A1/en active Pending
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