A large area battery packaging method

Abstract

The present invention relates to the field of battery technology, and in particular to a large-area battery packaging method, comprising determining the number of battery cells, the number of honeycomb battery modules and the number of battery cells of a reference honeycomb battery module; determining the battery structure of the large-area battery according to the number of battery cells of the reference honeycomb battery module and the number of battery cells of the honeycomb battery module; determining the number of redundant battery modules according to the battery structure; determining the position of the redundant battery modules according to the number of redundant battery modules and the corresponding number of used battery modules, connecting the redundant battery modules in parallel to form a redundant battery part, and connecting the corresponding used battery modules in parallel to form a used battery part; connecting the redundant battery part and the used battery part in parallel, and adding a redundant switch to the branch of the redundant battery part; closing the redundant switch according to the real-time battery power of the used battery part and the current maximum capacity of the battery, so as to improve the reliability of the battery.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a large-area battery packaging method. Background Art

[0002] Battery packaging technology refers to packaging battery cells or battery modules in a specific structure to provide protection, support and connection electrical functions. This technology is crucial in various applications, especially in electric vehicles, portable devices and energy storage systems. The battery packaging design directly affects the performance, safety and reliability of the overall system.

[0003] Chinese Patent Publication No. CN115513580A discloses a battery packaging method, in which a cover plate is manufactured according to a shell, so that the cover plate has a reserved flange extending in a circumferential direction, and after the cover plate covers the opening, the reserved flange protrudes from the shell in the circumferential direction of the opening; the reserved flange is melted to form a molten edge of a predetermined size, and the cover plate is joined to the shell through the molten edge to close the opening. The predetermined size of the pre-formed molten edge is obtained according to the sealing requirements. When manufacturing the cover plate, a reserved flange of a certain size is reserved according to the molten edge of the predetermined size required to be formed. When packaging, the reserved flange is melted and then retracted to form a molten edge with a protruding size smaller than the reserved flange. Under the premise of ensuring that the cover plate encapsulates the shell, the space occupied by the connection structure is reduced as much as possible, thereby improving the energy density of the formed battery. It can be seen that the invention has the following problems:

[0004] The problem of unstable large-area battery structure and low current maximum capacity of the battery due to the inability to flexibly determine the packaging method when the area and energy density requirements are determined is not considered. Summary of the invention

[0005] To this end, the present invention provides a large-area battery packaging method to overcome the problem in the prior art that the battery installation area is limited and the packaging method cannot be flexibly determined when the battery energy density requirement is determined, resulting in unstable battery structure and poor battery sustainability.

[0006] To achieve the above object, the present invention provides a large-area battery packaging method, comprising:

[0007] Obtain the required data for large-area batteries, the standard data for individual battery cells, and the honeycomb battery module data for individual honeycomb battery modules;

[0008] Determine the number of battery cells based on the required energy density and standard energy density;

[0009] Determine the number of honeycomb battery modules based on the required area and the area of ​​the honeycomb battery module, and determine the number of battery cells of the reference honeycomb battery module in combination with the number of battery cells;

[0010] Determine the battery structure of the large-area battery according to the number of battery cells of the reference honeycomb battery module and the number of battery cells of the honeycomb battery module;

[0011] Determining the number of redundant battery modules according to the battery structure includes:

[0012] If the battery structure is a honeycomb structure, the number of redundant battery modules of the honeycomb redundant battery module is determined according to the number of battery cells of the reference honeycomb battery module and the number of battery cells of the honeycomb battery module;

[0013] If the battery structure is a rectangular structure, the number of rectangular battery modules is determined according to the required area and the rectangular module area, and the number of reference rectangular module battery cells is determined in combination with the number of battery cells, and the number of redundant battery modules is determined according to the number of reference rectangular module battery cells and the number of rectangular module battery cells;

[0014] Determine a plurality of redundant battery module positions according to the number of redundant battery modules and the corresponding number of used battery modules, wherein the number of battery modules includes the number of honeycomb battery modules and the number of rectangular battery modules;

[0015] Connecting the redundant battery modules in parallel to form a redundant battery part, and connecting the corresponding working battery modules in parallel to form a working battery part;

[0016] Connecting the redundant battery part and the used battery part in parallel, and installing a redundant switch in the branch of the redundant battery part;

[0017] Closing the redundant switch according to the real-time battery power of the battery-using portion and the current maximum capacity of the battery;

[0018] The required data include required energy density and required area, the standard data include standard energy density and standard area, and the cellular battery module data include cellular battery module area and the number of battery cells in the cellular battery module.

[0019] Furthermore, the number of battery cells is calculated according to the following formula:

[0020]

[0021] Among them, S is the number of battery cells, a is the energy density coefficient, E is the required energy density, and E0 is the standard energy density.

[0022] Furthermore, the number of honeycomb battery modules is determined according to the required area and the area of ​​the honeycomb battery module, and the number of battery cells of the reference honeycomb battery module is determined in combination with the ratio of the number of battery cells to the number of the honeycomb battery modules.

[0023] Further, the battery structure of the large-area battery is determined according to the number of battery cells of the reference honeycomb battery module and the number of battery cells of the honeycomb battery module, wherein:

[0024] If the number of battery cells of the reference honeycomb battery module is greater than or equal to the number of battery cells of the honeycomb battery module, then the battery structure of the large-area battery is determined to be a honeycomb structure;

[0025] If the number of battery cells of the reference honeycomb battery module is less than the number of battery cells of the honeycomb battery module, it is determined that the battery structure of the large-area battery is a rectangular structure.

[0026] Furthermore, if the battery structure is honeycomb-shaped, the step of determining the number of redundant battery modules of the honeycomb redundant battery module according to the number of battery cells of the reference honeycomb battery module and the number of battery cells of the honeycomb battery module includes:

[0027] Determining the number of redundant cellular battery module battery cells of a single cellular battery module based on the difference between the number of battery cells of a reference cellular battery module and the number of battery cells of a cellular battery module;

[0028] Determining the number of redundant battery cells according to the ratio of the number of battery cells in the redundant cellular battery module to the number of cellular battery modules;

[0029] The number of redundant battery modules is determined according to the ratio of the number of redundant battery cells to the number of battery cells in the honeycomb battery module.

[0030] Furthermore, if the battery structure is a rectangular structure, the number of rectangular battery modules is determined based on the ratio of the required area to the area of ​​the rectangular module, and the number of reference rectangular module battery cells is determined based on the ratio of the number of battery cells to the number of rectangular battery modules, and the number of redundant battery modules is determined based on the number of reference rectangular module battery cells and the number of rectangular module battery cells.

[0031] Furthermore, several battery cells in a single battery module are connected in series;

[0032] Wherein, the battery module includes a redundant battery module and a used battery module.

[0033] Further, a plurality of redundant battery module positions are determined according to the number of redundant battery modules and the corresponding number of used battery modules, wherein:

[0034] If the ratio of the number of redundant battery modules to the number of corresponding used battery modules is less than a preset ratio, the redundant battery modules are connected and located at the center of the large area battery;

[0035] If the ratio of the number of redundant battery modules to the corresponding number of used battery modules is greater than or equal to a preset ratio, each of the redundant battery modules is evenly dispersed in the large-area battery.

[0036] Further, closing the redundant switch according to the real-time battery power of the battery portion in use and the current maximum capacity of the battery includes:

[0037] When the current maximum capacity of the battery is greater than the preset capacity, determining whether to close the redundant switch according to the real-time battery power;

[0038] When the current maximum capacity of the battery is less than or equal to the preset capacity, the redundant switch is closed.

[0039] Further, if the current maximum capacity of the battery is greater than the preset capacity, determining whether to close the redundant switch is based on the ratio of the real-time battery power to the preset battery power, including:

[0040] When the ratio of the real-time battery power to the preset battery power is less than 1, determining to close the redundant switch;

[0041] When the ratio of the real-time battery power to the preset battery power is greater than or equal to 1, it is determined not to close the redundant switch.

[0042] Compared with the prior art, the beneficial effect of the present invention lies in that the large-area battery packaging method provided by the present invention flexibly determines the packaging structure of the large-area battery, and the setting of redundant battery parts and the use of battery parts improve the reliability and sustainability of the battery system; by obtaining required data, single cell standard data and honeycomb battery module data, the number of battery cells and the number of honeycomb battery modules can be quickly determined to determine the packaging structure, so as to optimize the distribution and structure of the battery within a specified area size.

[0043] Furthermore, the introduction of redundant battery modules provides a reliable redundant protection mechanism for the continuity of the battery. By connecting the redundant battery part and the battery part in parallel and adding a redundant switch to the redundant battery part, the continuous power supply and safety of the battery can be guaranteed when the battery part fails or is low on power.

[0044] Furthermore, closing the redundant switch is based on the real-time battery power and maximum capacity of the battery part in use, ensuring that the redundant battery part can be quickly switched to when needed, thereby achieving real-time monitoring and management of the battery component status.

[0045] Furthermore, the method not only simplifies the production process, but also reduces the manufacturing cost and error rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 A large-area battery packaging method and a step diagram of an embodiment of the present invention;

[0047] Figure 2 A schematic diagram of a single honeycomb battery module according to an embodiment of the present invention;

[0048] Figure 3 A schematic diagram of a honeycomb structure according to an embodiment of the present invention;

[0049] Figure 4 A schematic diagram of a rectangular structure according to an embodiment of the present invention;

[0050] In the figure: 1, battery cell; 2, honeycomb battery module; 3, rectangular battery module. DETAILED DESCRIPTION

[0051] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0052] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0053] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0054] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] See also Figures 1 to 4 As shown, they are respectively a large-area battery packaging method and a step diagram of an embodiment of the present invention, a schematic diagram of a single honeycomb battery module of an embodiment of the present invention, a schematic diagram of a honeycomb structure of an embodiment of the present invention, and a schematic diagram of a rectangular structure of an embodiment of the present invention. The present invention provides a large-area battery packaging method, comprising:

[0056] Step S1, obtaining required data of a large-area battery, standard data of a single battery cell 1, and honeycomb battery module 2 data of a single honeycomb battery module;

[0057] Step S2, determining the number of battery cells 1 according to the required energy density and the standard energy density. It can be understood that the battery cell 1 is a basic unit of the power battery, which is composed of a positive electrode, a negative electrode, a separator and an electrolyte;

[0058] Step S3, determining the number of honeycomb battery modules 2 according to the required area and the area of ​​the honeycomb battery module 2, and determining the number of battery cells of the reference honeycomb battery module in combination with the number of battery cells 1; it can be understood that the number of battery cells of the reference honeycomb battery module is the calculated number of battery cells 1 that can be connected in series in a single honeycomb battery module 2;

[0059] Step S4, determining the battery structure of the large-area battery according to the number of battery cells of the reference honeycomb battery module and the number of battery cells of the honeycomb battery module;

[0060] Step S5, determining the number of redundant battery modules according to the battery structure, including:

[0061] Step S51, if the battery structure is a honeycomb structure, determining the number of redundant battery modules of the honeycomb redundant battery module according to the number of battery cells of the reference honeycomb battery module and the number of battery cells of the honeycomb battery module;

[0062] Step S52, if the battery structure is a rectangular structure, the number of rectangular battery modules 3 is determined according to the required area and the rectangular module area, and the number of reference rectangular module battery cells 1 is determined in combination with the number of battery cells 1, and the number of redundant battery modules is determined according to the number of reference rectangular module battery cells 1 and the number of rectangular module battery cells 1;

[0063] Step S6, determining a plurality of redundant battery module positions according to the number of redundant battery modules and the corresponding number of used battery modules, wherein the number of battery modules includes the number of honeycomb battery modules 2 and the number of rectangular battery modules 3;

[0064] Step S7, connecting the redundant battery modules in parallel to form a redundant battery part, and connecting the corresponding working battery modules in parallel to form a working battery part;

[0065] Step S8, connecting the redundant battery part and the used battery part in parallel, and installing a redundant switch on the branch of the redundant battery part;

[0066] Step S9, closing the redundant switch according to the real-time battery power of the battery in use and the current maximum capacity of the battery;

[0067] Among them, the required data includes required energy density and required area, the standard data includes standard energy density and standard area, and the honeycomb battery module 2 data includes the area of ​​the honeycomb battery module 2 and the number of battery cells in the honeycomb battery module (that is, the number of battery cells 1 that can actually be connected in series in a single honeycomb battery module 2).

[0068] In practice, each outer surface of each battery module housing has a structure that matches the housing of other battery modules to fix the relative positional relationship between the battery modules.

[0069] like Figure 2 The single honeycomb battery module 2 shown is configured as a regular hexagon, and the circle inside the single honeycomb battery module 2 represents a single battery cell 1. Figure 2 As shown, the above-mentioned matching structure can be any matching structure in the prior art. In one implementation, the three outer surfaces on the left side of the battery module of the battery module A are provided with slide rails, and the three outer surfaces on the right side are provided with grooves matching the slide rails, and the three grooves on the right side can move on the left slide rail; it can be understood that after the battery modules are connected to support the honeycomb structure or the rectangular structure, EVA material is filled between each battery module to reduce the collision between the battery modules.

[0070] Specifically, in step S2, the number of battery cells 1 is calculated according to the following formula:

[0071]

[0072] Wherein, S is the number of battery cells 1, a is the energy density coefficient, E is the required energy density, and E0 is the standard energy density.

[0073] In implementation, the energy density coefficient a is determined according to the tolerance of the energy density of a single battery cell 1 , and the value range of a is [0, A], where A=tolerance÷standard energy density, preferably a=0.5×A.

[0074] Specifically, in step S3 , the number of honeycomb battery modules 2 is determined according to the required area and the area of ​​the honeycomb battery module 2 , and the number of battery cells of the reference honeycomb battery module is determined in combination with the ratio of the number of battery cells 1 to the number of the honeycomb battery modules 2 .

[0075] In implementation, the step of determining the number of honeycomb battery modules 2 according to the required area and the area of ​​the honeycomb battery module 2 includes: step S31, determining the required length L1 and the required width L2 corresponding to the required area (required area = required length × required width); step S32, determining the side length b of a single honeycomb battery module 2; step S33, determining the maximum number of columns of honeycomb battery modules 2 in the required area according to the required width and side length, wherein, Step S34, determine the number of rows according to the required length L1 and the side length b, where the number of rows = (L1-2×b)÷1.5×b+1; Step S35, determine the number of honeycomb battery modules 2: if the calculated number of rows is an even number, the number of honeycomb battery modules 2 = 0.5×number of rows×maximum number of columns+0.5×number of rows×(maximum number of columns-1).

[0076] In implementation, the number of battery cells of the reference honeycomb battery module = the number of battery cells 1 ÷ the number of honeycomb battery modules 2 .

[0077] It is understandable that the principle of “rounding down” is adopted in the calculation process of the number of honeycomb battery modules 2 and the number of battery cells of the reference honeycomb battery module.

[0078] Specifically, in step S4, the battery structure of the large-area battery is determined according to the number of battery cells of the reference honeycomb battery module and the number of battery cells of the honeycomb battery module, wherein:

[0079] If the number of battery cells of the reference honeycomb battery module is greater than or equal to the number of battery cells of the honeycomb battery module, then the battery structure of the large-area battery is determined to be a honeycomb structure;

[0080] If the number of battery cells of the reference honeycomb battery module is less than the number of battery cells of the honeycomb battery module, it is determined that the battery structure of the large-area battery is a rectangular structure.

[0081] It is understandable that if Figure 2 and Figure 4 , when the area is the same, the number of battery cells in a single honeycomb battery module differs from the number of battery cells in a single rectangular battery module by 4 battery cells 1, but the honeycomb battery module 2 cannot fully utilize the required area, while the rectangular battery module 3 can fully utilize the required area to fill the required area (and, Figure 4 The area below that does not fit the rectangular battery module 3 can be filled with rectangular battery modules 3 of other areas); therefore, in the required area, the total number of battery cells 1 that can be accommodated by the rectangular battery module 3 is greater than the total number of battery cells 1 that can be accommodated by the honeycomb battery module 2.

[0082] Specifically, in step S51, if the battery structure is honeycomb, the step of determining the number of redundant battery modules of the honeycomb redundant battery module according to the number of battery cells of the reference honeycomb battery module and the number of battery cells of the honeycomb battery module includes:

[0083] Step S511, determining the number of redundant cellular battery module battery cells of a single cellular battery module 2 according to the difference between the number of battery cells of the reference cellular battery module and the number of battery cells of the cellular battery module;

[0084] Step S512, determining the number of redundant battery cells 1 according to the ratio of the number of battery cells of the redundant honeycomb battery module to the number of honeycomb battery modules 2;

[0085] Step S513, determining the number of redundant battery modules according to the ratio of the number of redundant battery cells 1 to the number of battery cells in the honeycomb battery module.

[0086] Specifically, in step S52, if the battery structure is a rectangular structure, the number of rectangular battery modules 3 is determined based on the ratio of the required area to the rectangular module area, and the number of reference rectangular module battery cells 1 is determined in combination with the ratio of the number of battery cells 1 to the number of rectangular battery modules 3, and the number of redundant battery modules is determined based on the number of reference rectangular module battery cells 1 and the number of rectangular module battery cells 1.

[0087] In implementation, the step of determining the number of redundant battery modules according to the number of battery cells 1 in the reference rectangular module and the number of battery cells 1 in the rectangular module includes:

[0088] Step S521, determining the number of redundant rectangular battery module battery cells of a single rectangular battery module 3 according to the difference between the number of battery cells of a reference rectangular battery module and the number of battery cells of a rectangular battery module;

[0089] Step S522, determining the number of redundant battery cells 1 according to the ratio of the number of battery cells in the redundant rectangular battery module to the number of rectangular battery modules 3;

[0090] Step S523, determining the number of redundant battery modules according to the ratio of the number of redundant battery cells 1 to the number of battery cells in the rectangular battery module.

[0091] Specifically, in a honeycomb structure or a rectangular structure, a number of battery cells 1 in a single battery module are connected in series;

[0092] Wherein, the battery module includes a redundant battery module and a used battery module.

[0093] Specifically, in step S6, a plurality of redundant battery module positions are determined according to the number of redundant battery modules and the corresponding number of used battery modules, wherein:

[0094] If the ratio of the number of redundant battery modules to the number of corresponding used battery modules is less than a preset ratio, the redundant battery modules are connected and located at the center of the large area battery;

[0095] If the ratio of the number of redundant battery modules to the corresponding number of used battery modules is greater than or equal to a preset ratio, the redundant battery modules are evenly dispersed in a large-area battery. When the number of redundant battery modules is large, the redundant battery modules are evenly dispersed in the entire battery, and the used battery modules can be separated, thereby dispersing the heat generated by the used battery modules and avoiding local overheating.

[0096] In implementation, the preset ratio ranges from 0.1:1 to 0.5:1, and the preferred preset ratio is set to 0.2:1;

[0097] Specifically, closing the redundant switch according to the real-time battery power of the battery-using portion and the current maximum capacity of the battery includes:

[0098] When the current maximum capacity of the battery is greater than the preset capacity, determining whether to close the redundant switch according to the real-time battery power;

[0099] When the current maximum capacity of the battery is less than or equal to the preset capacity, the redundant switch is closed.

[0100] It is understandable that when the current maximum capacity of the battery is less than or equal to the preset capacity, it means that the actual energy density of the battery part in use is lower than the standard, and the redundant battery part needs to be incorporated into the battery part in use to increase the sustainability and service life of the large-area battery.

[0101] In implementation, the preset capacity ranges from 50% to 80%, and preferably the preset capacity is 65%.

[0102] Specifically, if the current maximum capacity of the battery is greater than the preset capacity, determining whether to close the redundant switch according to the ratio of the real-time battery power to the preset battery power includes:

[0103] When the ratio of the real-time battery power to the preset battery power is less than 1, determining to close the redundant switch;

[0104] When the ratio of the real-time battery power to the preset battery power is greater than or equal to 1, it is determined not to close (open) the redundant switch.

[0105] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0106] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A large-area battery packaging method, characterized in that: include: Obtain the required data for large-area batteries, the standard data for individual battery cells, and the honeycomb battery module data for individual honeycomb battery modules; Determine the number of battery cells based on the required energy density and standard energy density; Determine the number of honeycomb battery modules based on the required area and the area of ​​the honeycomb battery module, and determine the number of battery cells of the reference honeycomb battery module in combination with the number of battery cells; Determine the battery structure of the large-area battery according to the number of battery cells of the reference honeycomb battery module and the number of battery cells of the honeycomb battery module; Determining the number of redundant battery modules according to the battery structure includes: If the battery structure is a honeycomb structure, the number of redundant battery modules of the honeycomb redundant battery module is determined according to the number of battery cells of the reference honeycomb battery module and the number of battery cells of the honeycomb battery module; If the battery structure is a rectangular structure, the number of rectangular battery modules is determined according to the required area and the rectangular module area, and the number of reference rectangular module battery cells is determined in combination with the number of battery cells, and the number of redundant battery modules is determined according to the number of reference rectangular module battery cells and the number of rectangular module battery cells; Determine a plurality of redundant battery module positions according to the number of redundant battery modules and the corresponding number of used battery modules, wherein the number of battery modules includes the number of honeycomb battery modules and the number of rectangular battery modules; Connecting the redundant battery modules in parallel to form a redundant battery part, and connecting the corresponding working battery modules in parallel to form a working battery part; Connecting the redundant battery part and the used battery part in parallel, and installing a redundant switch in the branch of the redundant battery part; Closing the redundant switch according to the real-time battery power of the battery-using portion and the current maximum capacity of the battery; The required data include required energy density and required area, the standard data include standard energy density and standard area, and the cellular battery module data include cellular battery module area and the number of battery cells in the cellular battery module.

2. The large-area battery packaging method according to claim 1, characterized in that: The number of battery cells is calculated according to the following formula: Among them, S is the number of battery cells, a is the energy density coefficient, E is the required energy density, and E0 is the standard energy density.

3. The large-area battery packaging method according to claim 1, characterized in that: The number of honeycomb battery modules is determined according to the required area and the area of ​​the honeycomb battery module, and the number of battery cells of the reference honeycomb battery module is determined in combination with the ratio of the number of battery cells to the number of the honeycomb battery modules.

4. The large-area battery packaging method according to claim 1, characterized in that: The battery structure of the large-area battery is determined according to the number of battery cells of the reference honeycomb battery module and the number of battery cells of the honeycomb battery module, wherein: If the number of battery cells of the reference honeycomb battery module is greater than or equal to the number of battery cells of the honeycomb battery module, then the battery structure of the large-area battery is determined to be a honeycomb structure; If the number of battery cells of the reference honeycomb battery module is less than the number of battery cells of the honeycomb battery module, it is determined that the battery structure of the large-area battery is a rectangular structure.

5. The large-area battery packaging method according to claim 4, characterized in that: If the battery structure is honeycomb, the step of determining the number of redundant battery modules of the honeycomb redundant battery module according to the number of battery cells of the reference honeycomb battery module and the number of battery cells of the honeycomb battery module includes: Determining the number of redundant cellular battery module battery cells of a single cellular battery module based on the difference between the number of battery cells of a reference cellular battery module and the number of battery cells of a cellular battery module; Determining the number of redundant battery cells according to the ratio of the number of battery cells in the redundant cellular battery module to the number of cellular battery modules; The number of redundant battery modules is determined according to the ratio of the number of redundant battery cells to the number of battery cells in the honeycomb battery module.

6. The large-area battery packaging method according to claim 4, characterized in that: If the battery structure is a rectangular structure, the number of rectangular battery modules is determined based on the ratio of the required area to the area of ​​the rectangular module, and the number of reference rectangular module battery cells is determined based on the ratio of the number of battery cells to the number of rectangular battery modules, and the number of redundant battery modules is determined based on the number of reference rectangular module battery cells and the number of rectangular module battery cells.

7. The large-area battery packaging method according to claim 1, characterized in that: Several battery cells in a single battery module are connected in series; Wherein, the battery module includes a redundant battery module and a used battery module.

8. The large-area battery packaging method according to claim 1, characterized in that: The positions of several redundant battery modules are determined according to the number of redundant battery modules and the corresponding number of used battery modules, wherein: If the ratio of the number of redundant battery modules to the number of corresponding used battery modules is less than a preset ratio, the redundant battery modules are connected and located at the center of the large area battery; If the ratio of the number of redundant battery modules to the corresponding number of used battery modules is greater than or equal to a preset ratio, each of the redundant battery modules is evenly dispersed in the large-area battery.

9. The large-area battery packaging method according to claim 1, characterized in that: Closing the redundant switch according to the real-time battery power of the battery portion in use and the current maximum capacity of the battery includes: When the current maximum capacity of the battery is greater than the preset capacity, determining whether to close the redundant switch according to the real-time battery power; When the current maximum capacity of the battery is less than or equal to the preset capacity, the redundant switch is closed.

10. The large-area battery packaging method according to claim 9, characterized in that: If the current maximum capacity of the battery is greater than the preset capacity, determine whether to close the redundant switch according to the ratio of the real-time battery power to the preset battery power. include, When the ratio of the real-time battery power to the preset battery power is less than 1, determining to close the redundant switch; When the ratio of the real-time battery power to the preset battery power is greater than or equal to 1, it is determined not to close the redundant switch.

Images