Battery pack and electric equipment

Abstract

The utility model relates to the technical field of power batteries, in particular to a battery pack and electric equipment. The battery pack comprises a reinforcing plate, a plurality of modules and a plurality of fixing pieces; the module comprises a shell and a plurality of cylindrical battery cells arranged in the shell; the plurality of modules are stacked in a first direction to form a columnar structure; the reinforcing plate is arranged on the outer side portion of the columnar structure, and the reinforcing plate is fixedly connected with the shell through the multiple fixing pieces so as to fix the multiple modules. According to the battery pack and the electric equipment provided by the invention, the problem of insufficient strength and rigidity after a plurality of standard modules are fixed into a group due to the structure of the existing battery pack is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power batteries, in particular to a battery pack and an electric device. BACKGROUND

[0002] It is well known that, in terms of reducing carbon emissions, electric vehicle technology is widely regarded as an effective solution, and one of the three cores of electric vehicle technology is power battery pack technology. With the rapid development of power battery pack technology, various battery packs have been researched, from standard module assembled battery packs, to CTP solutions, and short knife, long knife LCTP solutions, CTC solutions, and double-sided cooling, three-sided cooling solutions. A battery pack in the prior art is formed by stacking a plurality of standard modules in the same direction to assemble a battery pack with a long strip structure. This battery pack is suitable for assembly and cooling.

[0003] However, the strength and rigidity of the plurality of standard modules fixed into a group in the structure of the existing battery pack are insufficient. CONTENT OF THE INVENTION

[0004] The purpose of the present application is to provide a battery pack and an electric device, thereby solving the problem of insufficient strength and rigidity of the plurality of standard modules fixed into a group in the structure of the existing battery pack.

[0005] According to a first aspect of the present application, a battery pack is provided, which comprises a reinforcing plate, a plurality of modules and a plurality of fixing members; the module comprises an outer shell and a plurality of cylindrical battery cells arranged inside the outer shell; a plurality of the modules are stacked in a first direction to form a columnar structure; the reinforcing plate is arranged on the outer side of the columnar structure, and the reinforcing plate is fixedly connected with the outer shell through a plurality of the fixing members to fix a plurality of the modules.

[0006] In any of the above technical solutions, further, the columnar structure is a polygonal prism structure, the number of sides of the polygon is N, where N is greater than or equal to 5; the polygonal prism structure comprises N outer sides; the reinforcing plate is a rectangular plate, the number of the reinforcing plates is 2 to (N-2); the reinforcing plate is arranged on part of the N outer sides.

[0007] In any of the above technical solutions, further, when N is an odd number, at least two of the reinforcing plates are not arranged adjacently; when N is an even number, at least two of the reinforcing plates are arranged symmetrically.

[0008] In any of the above technical solutions, further, the battery pack further comprises an end plate, and the outer sides of the two modules located at the two ends are each provided with the end plate; the end plate at least comprises a plurality of edge portions arranged in alignment with the polygonal prism structure, the reinforcing plate is attached to the outer side of the edge portion, and the reinforcing plate is fixedly connected with the edge portion through the plurality of fixing members.

[0009] In any of the above technical solutions, further, the battery pack further comprises a plurality of partition plates, and the outer sides of any two adjacent modules and the two modules located at the two ends are each provided with the partition plate.

[0010] In any of the above technical solutions, further, the shell comprises a positive electrode core support and a negative electrode core support; the positive electrode core support comprises a first bottom wall and a first enclosing wall arranged along the edge of the first bottom wall, and the first bottom wall and the first enclosing wall form a first accommodating space; the negative electrode core support comprises a second bottom wall and a second enclosing wall arranged along the edge of the second bottom wall, and the second bottom wall and the second enclosing wall form a second accommodating space; the positive electrode core support and the negative electrode core support can be in contact to jointly accommodate a plurality of the cylindrical cells in the first accommodating space and the second accommodating space; the plurality of cylindrical cells are arranged in an array, and the cylindrical cells extend along the first direction, and the first bottom wall and the second bottom wall are respectively provided with first mounting through holes and second mounting through holes for mounting the cylindrical cells.

[0011] In any of the above technical solutions, further, the module further comprises a positive bus bar, a positive connecting lug, a negative bus bar and a negative connecting lug; the positive bus bar is arranged on one side of the first bottom wall, and the positive bus bar is provided with a plurality of first welding points corresponding to the plurality of cylindrical cells, the first welding points are welded with the corresponding cylindrical cells through the first mounting through holes, and the positive connecting lug is connected with the positive bus bar; the negative bus bar is arranged on one side of the second bottom wall, and the negative bus bar is provided with a plurality of second welding points corresponding to the plurality of cylindrical cells, the second welding points are welded with the corresponding cylindrical cells through the second mounting through holes, and the negative connecting lug is connected with the negative bus bar.

[0012] In any of the above technical solutions, further, the module further comprises a positive electrode collecting plate and a negative electrode collecting plate; the positive electrode collecting plate is arranged on the side of the positive electrode busbar opposite to the first bottom wall, and a plurality of first collecting pieces corresponding to the plurality of first welding points are arranged on the positive electrode collecting plate, and the first collecting pieces are welded with the corresponding first welding points; the positive electrode collecting plate is further provided with a positive electrode low-voltage collecting interface; and / or, the positive electrode collecting plate is provided with a positive electrode temperature sensing piece, and the positive electrode temperature sensing piece is attached to the positive electrode busbar; the negative electrode collecting plate is arranged on the side of the negative electrode busbar opposite to the second bottom wall, and a plurality of second collecting pieces corresponding to the plurality of second welding points are arranged on the negative electrode collecting plate, and the second collecting pieces are welded with the corresponding second welding points; the negative electrode collecting plate is further provided with a negative electrode low-voltage collecting interface; and / or, the negative electrode collecting plate is provided with a negative electrode temperature sensing piece, and the negative electrode temperature sensing piece is attached to the negative electrode busbar.

[0013] In any of the above technical solutions, further, the positive electrode connecting lug and the negative electrode connecting lug are located at a first outer side of the combined polygonal prism structure, the positive electrode low-voltage collecting interface and the negative electrode low-voltage collecting interface are located at a second outer side of the combined polygonal prism structure, and the reinforcing plate is arranged at other outer sides except the first outer side and the second outer side.

[0014] According to the second aspect of the present application, a battery pack is provided.

[0015] The battery pack of the present application comprises a reinforcing plate, a plurality of modules and a plurality of fixing members. The module comprises an outer shell and a plurality of cylindrical battery cells arranged inside the outer shell; the plurality of modules are arranged in a stacked manner in a first direction to form a columnar structure; the reinforcing plate is arranged at an outer side of the columnar structure, and the reinforcing plate is fixedly connected with the outer shell through the plurality of fixing members to fix the plurality of modules.

[0016] According to the above technical features, the present application has the following advantages:

[0017] The reinforcing plate is arranged at the outer side of the columnar structure module, and the reinforcing plate is fixedly connected with the outer shell of the module by using the fixing member, so that the plurality of module assemblies are assembled together, the overall rigidity of the module assembly is improved, the plurality of modules form a high-strength and high-rigidity assembly body, and the module and the cylindrical battery cell are protected, and the anti-extrusion and anti-impact ability of the side of the module is improved.

[0018] In order to make the above-mentioned purposes, characteristics and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram illustrating the assembly structure of a battery pack according to an embodiment of this application is shown;

[0021] Figure 2 Show Figure 1 Side view;

[0022] Figure 3 Show Figure 2 A schematic diagram of the structure after the first high-voltage busbar, the second high-voltage busbar, and the connecting wires have been installed;

[0023] Figure 4 A schematic diagram of the overall structure of the module according to an embodiment of this application is shown;

[0024] Figure 5 Show Figure 1 The main view.

[0025] Icons: 10-Module; 100-Shell; 110-Positive cell bracket; 120-Negative cell bracket; 121-Second bottom wall; 122-Second enclosure wall; 1211-Second mounting through hole; 130-Cylindrical cell; 140-Positive busbar; 141-Positive connector; 150-Negative busbar; 151-Negative connector; 152-Bar; 160-Positive acquisition board; 161-Positive low-voltage acquisition interface; 170-Negative acquisition board; 171-Negative low-voltage acquisition interface; 200-Reinforcing plate; 300-Fixing component; 400-Partition plate; 500-End plate; 510-Connecting eaves; 600-Connecting wire; 700-First high-voltage busbar; 800-Second high-voltage busbar; X-First direction. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. The components of the embodiments of this application described and labeled in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the application as claimed, but merely represents selected embodiments of the application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the application without creative labor are within the scope of protection of the application.

[0028] It should be noted that similar reference numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0029] In the description of the application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed, and are merely for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, the terms "first", "second", "third", and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0030] In addition, the terms "horizontal", "vertical", "overhanging", and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0031] In the description of the application, it should also be noted that unless otherwise explicitly specified and limited, the terms "provided", "mounted", "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements inside. For those of ordinary skill in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0032] Some embodiments of the application will be described in detail below with reference to the accompanying drawings. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0033] The first aspect of the application provides a battery pack, thereby solving the problem that the strength and rigidity of a plurality of standard modules fixed into a group are insufficient. The following refers to Figures 1 to 5 The battery pack described in some embodiments of the application is described.

[0034] As Figure 1 shown, the battery pack of the present application comprises a reinforcing plate 200, a plurality of modules 10 and a plurality of fixing members 300. Among them, the module 10 comprises a shell 100 and a plurality of cylindrical battery cells 130 arranged inside the shell 100; a plurality of modules 10 are arranged in a first direction X to form a columnar structure; the reinforcing plate 200 is arranged on the outer side of the columnar structure, and the reinforcing plate 200 is fixedly connected with the shell 100 through the plurality of fixing members 300 to fix the plurality of modules 10.

[0035] That is, the reinforcing plate 200 is arranged on the outer side of the columnar structure module 10, and the reinforcing plate 200 is fixedly connected with the shell 100 of the module 10 using the fixing member 300, so as to assemble the plurality of modules 10 together, improve the overall rigidity of the module 10 assembly, and make the plurality of modules 10 form a high-strength and high-rigidity assembly body, which protects the module 10 and the cylindrical battery cell 130 and improves the anti-extrusion and anti-impact ability of the side of the module 10.

[0036] In the embodiment of the present application, as Figure 1 and Figure 5 shown, preferably, the fixing member 300 is a bolt. The reinforcing plate 200 is fixedly connected with the shell 100 through a plurality of bolts. In this way, not only is the assembly convenient, but also the overall rigidity and overall strength of the module 10 assembly are higher.

[0037] In the embodiment of the present application, the columnar structure can be a polygonal prism structure, and the number of sides of the polygon is N, wherein N≥5. The polygonal prism structure comprises N outer sides. The number of reinforcing plates 200 is 2 to (N-2). The reinforcing plate 200 is arranged on part of the N outer sides.

[0038] When N is an odd number, at least two reinforcing plates 200 are not arranged adjacent to each other; when N is an even number, at least two reinforcing plates 200 are symmetrically arranged. In this way, the overall rigidity and overall strength of the module 10 assembly can be provided.

[0039] Hereinafter, a hexagon will be taken as an example for description. In the embodiment of the present application, as Figure 1 and Figure 5As shown, preferably, the shell 100 of the module 10 is a hexagonal prism structure, and a plurality of modules 10 are arranged in a stacked manner in the first direction X to form a hexagonal prism structure. The hexagonal prism structure comprises a first outer side, a second outer side, a third outer side, a fourth outer side, a fifth outer side, and a sixth outer side. Among them, the reinforcing plate 200 is preferably a rectangular plate, and the number of reinforcing plates 200 is four. The four reinforcing plates 200 are arranged at the first outer side, the second outer side, the third outer side, and the fourth outer side, respectively. Each reinforcing plate 200 is fixedly connected to the shell 100 of the corresponding side by a plurality of fixing members 300 to fix the plurality of modules 10. It should be noted that the four reinforcing plates 200 are arranged on which four sides of the hexagonal prism structure is not particularly limited, and the space reserved on the other two sides of the hexagonal prism structure is convenient for wiring. The module 10 according to some embodiments of the present application will be described below.

[0040] In the embodiments of the present application, in order to further improve the overall rigidity and overall strength of the module 10 assembly, as shown in Figure 1 The battery pack of the present application also comprises two end plates 500. Among the plurality of modules 10, the outermost sides of the two modules 10 at both ends are provided with end plates 500. In this way, the reinforcing plate 200 of the present application is fixedly connected to the shell 100 of the module 10 and the end plate 500 through the fixing member 300. The plurality of modules 10 are assembled together to further improve the overall rigidity and overall strength of the module 10 assembly.

[0041] In the embodiments of the present application, further, as shown in Figure 1 and Figure 2 The end plate 500 comprises at least six edge portions arranged in alignment with the hexagonal prism structure, and each edge portion is provided with a connecting eave 510 extending in the first direction X. The reinforcing plate 200 can be fixedly connected to the connecting eave 510 of the edge portion through the fixing member 300. In this way, the connection between the reinforcing plate 200 and the end plate 500 is further facilitated, and the overall rigidity and overall strength of the module 10 assembly are further improved.

[0042] In the embodiments of the present application, in order to further improve the overall rigidity and overall strength of the module 10 assembly, as shown in Figure 1 The battery pack of the present application also comprises a plurality of partition plates 400. Each module 10 is provided with a partition plate 400 on each side opposite to each other in the first direction X. The partition plate 400 is a hexagonal structure, and the partition plate 400 is arranged in alignment with the module 10 of the hexagonal prism structure. In this way, the partition plate 400 is arranged in the middle of each module 10. The partition plate 400 not only can further improve the overall rigidity and overall strength of the module 10 assembly, but also can provide insulation protection. In addition, when the battery cell in a certain module 10 is in thermal runaway, the partition plate 400 can also play a heat insulation function, thereby improving the safety of the entire module 10 assembly.

[0043] In summary, the application sets four reinforcing plates 200 in the circumferential direction of the hexagonal prism structure, sets end plates 500 at the ends, and uses fixing members 300 to fixedly connect the reinforcing plates 200 with the shell 100 and the end plates 500, thereby assembling a plurality of module 10 assemblies, improving the overall rigidity of the module 10 assembly, and forming a high-strength and high-rigidity assembly body from the plurality of modules 10, which protects the module 10 and the cylindrical battery cell 130 and improves the ability of the module 10 to resist extrusion on the side surface, ball impact and impact on the bottom surface. Through simple flat plate protection structure design, the required external protection design is reduced, and the design and manufacturing difficulty of the battery pack is reduced.

[0044] Reference will now be made to Figure 4 The module 10 described in some embodiments of the application.

[0045] As Figure 4 shown, the shell 100 of the module 10 includes a positive electrode cell support 110, a negative electrode cell support 120, and a plurality of cylindrical battery cells 130. The positive electrode cell support 110 includes a first bottom wall and a first surrounding wall arranged along the edge of the first bottom wall, and the first bottom wall and the first surrounding wall form a first containing space; the negative electrode cell support 120 includes a second bottom wall 121 and a second surrounding wall 122 arranged along the edge of the second bottom wall 121, and the second bottom wall 121 and the second surrounding wall 122 form a second containing space; the positive electrode cell support 110 and the negative electrode cell support 120 can be butted to jointly contain the plurality of cylindrical battery cells 130 in the first containing space and the second containing space; the plurality of cylindrical battery cells 130 are arranged in an array, and the cylindrical battery cells 130 extend along a first direction X, and the first bottom wall and the second bottom wall 121 are respectively provided with first mounting through holes and second mounting through holes 1211 for mounting the cylindrical battery cells 130.

[0046] Further, in the embodiments of the application, as Figure 4 shown, the module 10 further includes a positive bus bar 140, a positive connection lug 141, a negative bus bar 150, and a negative connection lug 151. The positive bus bar 140 is arranged on one side of the first bottom wall, and the positive bus bar 140 is provided with a plurality of first welding points corresponding to the plurality of cylindrical battery cells 130, the first welding points are welded with the corresponding cylindrical battery cells 130 through the first mounting through holes, and the positive connection lug 141 is connected with the positive bus bar 140. Similarly, the negative bus bar 150 is arranged on one side of the second bottom wall 121, and the negative bus bar 150 is provided with a plurality of second welding points corresponding to the plurality of cylindrical battery cells 130, the second welding points are welded with the corresponding cylindrical battery cells 130 through the second mounting through holes 1211, and the negative connection lug 151 is connected with the negative bus bar 150.

[0047] In the embodiments of the application, as Figure 4As shown, the positive electrode cell support 110 and the negative electrode cell support 120 are hexagonal prism structures, and the cylindrical cells 130 are radially stacked and placed, and form a single block module 10 according to a specified series-parallel connection rule. As an example, the series-parallel connection rule of the single block module 10 of the present application is 6P15S (6 cylindrical cells 130 form a group, and there are 15 groups in total), and the single block module 10 is selected to have a hexagonal prism structure.

[0048] Further, the corresponding positive bus bar 140 and the negative bus bar 150 are also hexagonal structures, and the positive bus bar 140 and the negative bus bar 150 are connected in series with the 15 groups of cylindrical cells 130.

[0049] As an example, as shown in FIG. 2, the positive bus bar 140 is provided with a plurality of buss bars, and the buss bars are arc-shaped. Each buss bar includes two first welding points at two ends thereof, and one group of three mutually parallel buss bars corresponds to one group of six cylindrical cells 130. Similarly, the negative bus bar 150 is provided with a plurality of buss bars 152, and the buss bars 152 are arc-shaped. Each buss bar 152 includes two second welding points at two ends thereof, and one group of three mutually parallel buss bars 152 corresponds to one group of six cylindrical cells 130. Figure 4

[0050] The 15 groups of cylindrical cells 130 of the present application are arranged with the positive and negative electrodes of each adjacent two groups being reversed, and the 15 groups of buss bars on the positive bus bar 140 and the 15 groups of buss bars on the negative bus bar 150 sequentially connect the positive and negative electrodes of the 15 groups of cylindrical cells 130. Among them, the positive connecting lug 141 is connected with the first group of buss bars of the positive bus bar 140 (the first group of buss bars in the 15 groups of buss bars, that is, the buss bar welded with the first group of cylindrical cells 130, and this group of buss bars is positive). Among them, the negative connecting lug 151 is connected with the last group of buss bars of the negative bus bar 150 (the last group of buss bars in the 15 groups of buss bars, that is, the buss bar welded with the last group of cylindrical cells 130, and this group of buss bars is negative).

[0051] Further, in the embodiment of the present application, as shown in FIG. 3, the module 10 further includes a positive collecting plate 160 and a negative collecting plate 170. Among them, the positive collecting plate 160 is arranged on the side of the positive bus bar 140 opposite to the first bottom wall, and the positive collecting plate 160 is provided with a plurality of first collecting pieces corresponding to the plurality of first welding points, and the first collecting pieces are welded with the corresponding first welding points. Similarly, the negative collecting plate 170 is arranged on the side of the negative bus bar 150 opposite to the second bottom wall 121, and the negative collecting plate 170 is provided with a plurality of second collecting pieces corresponding to the plurality of second welding points, and the second collecting pieces are welded with the corresponding second welding points. Figure 4

[0052] ​​It should be noted that, taking a single module with a series-parallel connection rule of 6P15S as an example, the number of first acquisition plates is at least 15, and these 15 first acquisition plates correspond one-to-one with the 15 groups of terminals on the positive bus 140. The number of second acquisition plates is at least 15, and these 15 second acquisition plates correspond one-to-one with the 15 groups of terminals on the negative bus 150. In this embodiment, the first and second acquisition plates are preferably nickel plates, which are used to acquire the voltage of the 15 groups of cylindrical cells 130.

[0053] Furthermore, in the embodiments of this application, a positive temperature sensor is also provided on the positive electrode acquisition plate 160, which is bonded to the positive electrode bus 140 to acquire the temperature of the cylindrical cell 130. Similarly, a negative temperature sensor is provided on the negative electrode acquisition plate 170, which is bonded to the negative electrode bus 150 to acquire the temperature of the cylindrical cell 130. In this embodiment, the number and position of the positive and negative temperature sensors can be set according to requirements.

[0054] In addition, the positive electrode acquisition board 160 is also provided with a positive low voltage acquisition interface 161 for connecting external devices, and the negative electrode acquisition board 170 is also provided with a negative low voltage acquisition interface 171 for connecting external devices.

[0055] In the embodiments of this application, both the positive electrode cell support 110 and the negative electrode cell support 120 are hexagonal prism structures. The positive electrode bus 140, negative electrode bus 150, positive electrode acquisition plate 160, and negative electrode acquisition plate 170 are also hexagonal structures, aligned with these hexagonal prism structures. Four sides of the hexagonal prism structure are used to fix the reinforcing plate 200, while the reserved space on the other two sides facilitates wiring.

[0056] As an example, such as Figure 3 and Figure 4 As shown, the positive terminal connector 141 and the negative terminal connector 151 are both located on the same side of the hexagonal prism structure, and the positive low-voltage acquisition interface 161 and the negative low-voltage acquisition interface 171 are also located on the same side of the hexagonal prism structure. This arrangement, placing the positive terminal connector 141 and the negative terminal connector 151 on one side and the positive low-voltage acquisition interface 161 and the negative low-voltage acquisition interface 171 on the other side, facilitates high-voltage connection and low-voltage acquisition for the module 10 assembly.

[0057] In the embodiments of this application, such as Figure 3As shown, the battery pack further includes a plurality of first high-voltage rows 700, two second high-voltage rows 800, and a connecting wire 600. Among them, each first high-voltage row 700 connects the positive and negative connecting ears 141 and 151 of two adjacent modules 10. The two second high-voltage rows 800 respectively connect the positive and negative connecting ears 141 and 151 of the two modules 10 at both ends. The connecting wire 600 connects all the positive and negative low-voltage collection interfaces 161 and 171, and outputs through a connector for connection with external equipment.

[0058] The module 10 of the present application is assembled as follows:

[0059] A plurality of cylindrical cells 130 are sequentially placed in the positive and negative cell supports 110 and 120 according to the 6P15S series-parallel connection specification. After the positive and negative cell supports 110 and 120 are assembled with the cylindrical cells 130, the tabs on the positive and negative bus bars 140 and 150 are welded on the side surfaces of the positive and negative cell supports 110 and 120, respectively. The tabs weld the negative or positive of the cylindrical cells 130. Then, the nickel tabs on the FPC positive and negative collection plates 160 and 170 are welded and the temperature sensing tabs are bonded. Finally, the positive and negative bus bars 140 and 150, the positive and negative collection plates 160 and 170 are hot-anchored to the positive and negative cell supports 110 and 120 using a hot anchor process, forming a single module 10.

[0060] In summary, the present application has a partition plate 400 and an end plate 500 placed between and outside a plurality of modules 10. The circumferential direction of the module 10 is provided with four reinforcing plates 200, which are fixedly connected with the shell 100 and the end plate 500 using bolts, so that the plurality of modules 10 form a high-strength and high-rigidity assembly.

[0061] The present application only needs to replace one module 10 when one module 10 malfunctions, improving the maintenance and disassembly.

[0062] The present application uses array-type module 10 arrangement. When the required voltage and power are different, the voltage and power can be changed by changing the series-parallel connection number of the single module 10 and the number of the overall module 10, having high flexibility and matching compatibility.

[0063] The second aspect of the present application provides a power consumption device, which includes the battery pack as described above.

[0064] Finally, it should be noted that the above-described embodiments are merely specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, but not to limit the same, and the protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that any person skilled in the art can make modifications or easily think of changes to the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some of the technical features within the technical range disclosed by the present application, and these modifications, changes or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and all should be covered within the protection scope of the present application.

Claims

1. A battery pack, characterized in that, It includes a reinforcing plate (200), multiple modules (10), and multiple fasteners (300); The module (10) includes a housing (100) and a plurality of cylindrical battery cells (130) disposed inside the housing (100); Multiple modules (10) are stacked in a first direction (X) to form a columnar structure; The reinforcing plate (200) is disposed on the outer side of the columnar structure, and the reinforcing plate (200) is fixedly connected to the outer shell (100) by a plurality of the fixing members (300) to fix the plurality of the modules (10).

2. The battery pack according to claim 1, characterized in that, The columnar structure is a polygonal prism structure, and the number of sides of the polygon is N, where N≥5; The polygonal prism structure includes N outer portions; The reinforcing plate (200) is a rectangular plate, and the number of reinforcing plates (200) is 2 to (N-2). The reinforcing plate (200) is disposed in the N outer portions.

3. The battery pack according to claim 2, characterized in that, When N is an odd number, at least two of the reinforcing plates (200) are not arranged adjacent to each other; When N is an even number, at least two of the reinforcing plates (200) are symmetrically arranged.

4. The battery pack according to claim 2, characterized in that, The battery pack also includes an end plate (500), and the end plate (500) is provided on the outer side of the two modules (10) located at both ends of the plurality of modules (10); The end plate (500) includes at least a plurality of sides aligned with the polygonal prism structure, the reinforcing plate (200) is attached to the outer side of the sides, and the reinforcing plate (200) is fixedly connected to the sides by a plurality of the fasteners (300).

5. The battery pack according to claim 4, characterized in that, The battery pack also includes multiple separators (400), and the separators (400) are provided between any two adjacent modules (10) and on the outer sides of the two modules (10) located at both ends.

6. The battery pack according to claim 2, characterized in that, The outer casing (100) includes a positive electrode cell support (110) and a negative electrode cell support (120); The positive electrode cell support (110) includes a first bottom wall and a first enclosure wall disposed along the edge of the first bottom wall, the first bottom wall and the first enclosure wall forming a first accommodating space; The negative electrode cell support (120) includes a second bottom wall (121) and a second enclosure wall (122) disposed along the edge of the second bottom wall (121), the second bottom wall (121) and the second enclosure wall (122) enclosing to form a second receiving space; The positive electrode cell support (110) and the negative electrode cell support (120) can contact each other so that the first accommodating space and the second accommodating space can jointly accommodate a plurality of the cylindrical cells (130); Multiple cylindrical cells (130) are arranged in an array, and the cylindrical cells (130) extend along the first direction (X). The first bottom wall and the second bottom wall (121) are respectively provided with a first mounting through hole and a second mounting through hole (1211) for mounting the cylindrical cells (130).

7. The battery pack according to claim 6, characterized in that, The module (10) further includes a positive busbar (140), a positive connector (141), a negative busbar (150), and a negative connector (151); The positive busbar (140) is disposed on one side of the first bottom wall. The positive busbar (140) is provided with a plurality of first welding points adapted to the plurality of cylindrical cells (130). The first welding points are welded to the corresponding cylindrical cells (130) through the first mounting through holes. The positive connecting lug (141) is connected to the positive busbar (140). The negative busbar (150) is disposed on one side of the second bottom wall (121). The negative busbar (150) is provided with a plurality of second welding points adapted to the plurality of cylindrical cells (130). The second welding points are welded to the corresponding cylindrical cells (130) through the second mounting through hole (1211). The negative connecting ear (151) is connected to the negative busbar (150).

8. The battery pack according to claim 7, characterized in that, The module (10) also includes a positive electrode acquisition plate (160) and a negative electrode acquisition plate (170); The positive electrode acquisition plate (160) is disposed on the side of the positive electrode busbar (140) opposite to the first bottom wall. The positive electrode acquisition plate (160) is provided with a plurality of first acquisition plates adapted to a plurality of first welding points. The first acquisition plates are welded to the corresponding first welding points. The positive electrode acquisition plate (160) is also provided with a positive low-voltage acquisition interface (161). And / or, the positive electrode acquisition plate (160) is provided with a positive temperature sensing plate. The positive temperature sensing plate is attached to the positive electrode busbar (140). The negative electrode acquisition plate (170) is disposed on the side of the negative electrode busbar (150) opposite to the second bottom wall (121). The negative electrode acquisition plate (170) is provided with a plurality of second acquisition plates adapted to a plurality of second welding points. The second acquisition plates are welded to the corresponding second welding points. The negative electrode acquisition plate (170) is also provided with a negative electrode low-voltage acquisition interface (171). And / or, the negative electrode acquisition plate (170) is provided with a negative electrode temperature sensing plate, which is attached to the negative electrode busbar (150).

9. The battery pack according to claim 8, characterized in that, The positive electrode connector (141) and the negative electrode connector (151) are both located on the first outer side of the combined polygonal prism structure. The positive low-voltage acquisition interface (161) and the negative low-voltage acquisition interface (171) are both located on the second outer side of the combined polygonal prism structure. The reinforcing plate (200) is provided on the other outer sides except for the first and second outer sides.

10. An electrical appliance, characterized in that, Includes the battery pack as described in any one of claims 1-9.

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