Battery packaging structure, battery module and battery pack

Abstract

The utility model relates to a battery packaging structure, a battery module and a battery pack, the battery packaging structure comprises two end plates and two side plates, and the two ends of each side plate are connected with the end plates respectively so as to jointly define a fixing space for fixing a battery cell. Wherein one of the end plate and the side plate which are connected is provided with a clamping part, the other one of the end plate and the side plate which are connected is provided with a clamping hole, the clamping part and the clamping hole are detachably connected in a clamping mode, and the end plate and the side plate are connected in a limiting mode in the horizontal plane and the vertical direction. According to the technical scheme, the end plates and the side plates are detachably connected in the mode that the clamping holes and the clamping parts are clamped, connection is reliable, and the module is convenient to disassemble and assemble. And meanwhile, the end plates and the side plates are simultaneously limited in the horizontal plane and the vertical direction only through the clamping holes and the clamping parts, so that the connection of the end plates and the side plates is more reliable, and the battery packaging structure can be simplified.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to a battery packaging structure, a battery module, and a battery pack. Background Art

[0002] In related technologies, in the process of forming battery cells into a group, the external packaging of the module is mostly achieved by welding the end plates and side plates. Welding not only causes deformation of the side plates, but also may have poor welding, resulting in unreliable connection between the end plates and side plates. Moreover, the welded end plates and side plates are not detachable. To disassemble the module, the side plates must be cut, which may cause secondary damage to the battery cells during the disassembly process. Summary of the Utility Model

[0003] Based on this, in view of the problem of unreliable and non-detachable connection between the end plates and side plates for the packaged module, it is necessary to provide a battery packaging structure, a battery module, and a battery pack.

[0004] In a first aspect, an embodiment of this application provides a battery packaging structure, which includes:

[0005] Two end plates;

[0006] Two side plates, with both ends of each side plate respectively connected to the end plates to jointly enclose a fixing space for fixing the battery cells;

[0007] Wherein, among each connected end plate and side plate, one of them is provided with a clamping portion, and the other is provided with a clamping hole; the clamping portion is detachably clamped with the clamping hole, and limits the connection between the end plate and the side plate in the horizontal and vertical directions.

[0008] In some embodiments, the clamping portion includes a hook, and the hook includes a connecting section and a hook section that are bent and connected. The connecting section is connected to one of them, and a clamping gap is formed between the hook section and one of them at an interval;

[0009] In the state where the hook is clamped with the clamping hole, the connecting section penetrates through the clamping hole of the other one, so that a part of the other one is located in the clamping gap, and the hook section abuts the other one located in the clamping gap against one of them.

[0010] In some embodiments, hooks are provided at both ends of the two end plates connected to the same side plate, and the hook sections of the hooks at these two ends extend away from each other; and / or,

[0011] Hooks are provided at both ends of the two side plates connected to the same end plate, and the hook sections of the hooks at these two ends extend away from each other.

[0012] In some embodiments, in a state where the hook is engaged with the engaging hole, an inner side surface of the connecting section is in contact with a hole wall of the engaging hole, and an outer side surface of the connecting section is spaced apart from the hole wall of the engaging hole.

[0013] In some embodiments, a free end of the hook section forms an inclined surface, and the inclined surface forms a part of an inner wall of the engaging gap; a distance from the inclined surface to one of them gradually increases in a direction in which the hook section extends away from the connecting section.

[0014] In some embodiments, the engaged engaging portion and the engaging hole form an engaging group; the end plate and the side plate that are connected are connected via a plurality of groups of the engaging groups arranged at intervals in the vertical direction.

[0015] In some embodiments, at least one end of the end plate in the vertical direction is provided with a mounting position for mounting on an external structure;

[0016] The end plate includes a concave hole recessed away from the fixed space, and a vertically arranged vertical reinforcing strip is arranged in the concave hole. The mounting position includes a mounting hole extending from an end of the end plate to the inside of the vertical reinforcing strip.

[0017] In a second aspect, an embodiment of the present application provides a battery module, and the battery module includes:

[0018] The battery packaging structure according to any one of the above embodiments; and

[0019] A plurality of battery cells, and all the battery cells are fixed in the fixed space.

[0020] In some embodiments, the plurality of battery cells are arranged in sequence along the extending direction of the side plate; the battery module includes a buffer member, and the buffer member is arranged between two adjacent battery cells, and / or, the buffer member is arranged between the battery cell and the end plate.

[0021] In a third aspect, an embodiment of the present application provides a battery pack, including:

[0022] A box body; and

[0023] The battery module as in the above embodiment, accommodated in the box body.

[0024] For the above battery packaging structure, battery module and battery pack, the end plate and the side plate are detachably connected by a way of engaging the engaging hole with the engaging portion, which is not only reliable in connection, but also convenient for disassembly and assembly of the battery module. At the same time, the end plate and the side plate are only limited in the horizontal plane and the vertical direction by relying on the engaging hole and the engaging portion, which not only makes the connection between the two more reliable, but also simplifies the battery packaging structure. Description of the Drawings

[0025] Upon reading the following detailed description of the preferred embodiments, various other advantages and benefits will become apparent to those of ordinary skill in the art. The drawings are only for the purpose of illustrating the preferred embodiments and are not considered to be a limitation of the present application. Moreover, in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0026] Figure 1 is an assembly schematic diagram of a battery module according to some embodiments of the present application.

[0027] Figure 2 is Figure 1 an exploded view of the structure shown.

[0028] Figure 3 is Figure 1 an enlarged view of part A in.

[0029] Figure 4 is Figure 1 a schematic structural diagram of an end plate in the battery module shown.

[0030] Figure 5 is Figure 1 a schematic structural diagram of a side plate in the battery module shown.

[0031] Figure 6 is Figure 4 an enlarged view of part B in.

[0032] The reference numerals in the specific embodiments are as follows:

[0033] 100, battery module; 20, battery cell; 30, buffer member; 10, battery packaging structure; 10a, fixed space; Z, vertical direction; 11, end plate; 11a, concave hole; 11b, vertical reinforcing strip; 11c, horizontal reinforcing strip; 12, side plate; 13, clamping hole; 14, clamping portion; 14a, hook; a1, connecting section; a2, hook section; h, clamping clearance; m, inclined surface; k, mounting position; k1, mounting hole. Specific Embodiments

[0034] To make the above objects, features, and advantages of the present application more apparent and understandable, the following detailed description of the specific embodiments of the present application will be given with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0035] In the description of the present application, it should be understood that if present, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0036] In addition, if present, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0037] In the present application, unless otherwise clearly specified and defined, if present, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0038] In the present application, unless otherwise clearly specified and defined, if present, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0039] It should be noted that, if any, when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation.

[0040] In view of the problem that the connection between the end plate and the side plate for battery module packaging is unreliable and non-detachable, the present application provides a battery packaging structure, a battery module and a battery pack. The end plate and the side plate of the battery packaging structure provided by the embodiments of the present application are connected by a detachable snap connection, which is not only reliable in connection but also convenient for module disassembly and assembly.

[0041] Figure 1 It is an assembly schematic diagram of a battery module according to some embodiments of the present application. Figure 2 is Figure 1 an exploded view of the structure shown.

[0042] Referring to Figure 1 and Figure 2 , the battery module 100 provided by the embodiments of the present application includes a battery packaging structure 10 and a plurality of battery cells 20, and the battery packaging structure 10 is encapsulated outside all the battery cells 20. In some embodiments, as shown in Figure 1 and Figure 2 , the battery cells 20 in the battery module 100 are cuboid-shaped, and a plurality of battery cells 20 are arranged in sequence in the thickness direction to form a battery cell group, and the battery cell group is limited within the battery packaging structure 10. Of course, in other embodiments, the battery cells 20 can be cube-shaped, cylindrical or other shapes.

[0043] The battery cell 20 is the smallest unit for the battery to undergo an electrochemical reaction, and generally includes a housing, an electrode assembly accommodated inside the housing, an electrolyte injected into the housing, an insulating film wrapped outside the electrode assembly, and so on. The battery cell 20 can be a secondary battery or a primary battery, and the battery cell 20 can be but is not limited to a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, etc. The electrode assembly generally includes a separator, a positive electrode plate and a negative electrode plate, and the positive electrode plate and the negative electrode plate are isolated by the separator. The separator can be but is not limited to a film layer structure made of materials such as polyolefin, polypropylene or polyethylene that allows ions to pass through. The electrode assembly can be a wound type, a stacked type, etc.

[0044] The battery pack can be prepared by using the battery module 100 of the embodiments of the present application. The battery pack in the embodiments of the present application may further include a box body in addition to the battery module 100, and the battery module 100 is accommodated in the box body. In addition, a liquid cooling structure for cooling the battery module 100, a battery management system for piping the battery cells 20, etc. can also be provided in the battery pack.

[0045] The battery packaging structure 10 in the embodiments of the present application will be introduced below.

[0046] Figure 3 For Figure 1 the enlarged view at position A in

[0047] Referring to Figure 1 、 Figure 2 and Figure 3 In the battery packaging structure 10 in the embodiments of the present application, it includes two end plates 11 and two side plates 12. Both ends of each side plate 12 are respectively connected to each end plate 11 to jointly enclose a fixing space 10a for fixing the battery cell 20. Among them, in each pair of connected end plate 11 and side plate 12, one of them is provided with a clamping portion 14, and the other is provided with a clamping hole 13. The clamping portion 14 is detachably clamped with the clamping hole 13, and limits the connection between the end plate 11 and the side plate 12 in the horizontal plane and the vertical direction Z.

[0048] In the actual use state, the two end plates 11 are arranged at intervals along the first horizontal direction (which can correspond to the length direction of the battery module 100), and the two side plates 12 are arranged at intervals along the second horizontal direction (which can correspond to the width direction of the battery module 100). The same ends of the two end plates 11 in the second horizontal direction are connected to the same side plate 12, and the same other ends are connected to the other side plate 12. The two end plates 11 and the two side plates 12 jointly enclose the fixing space 10a. Among them, the first horizontal direction and the second horizontal direction are substantially perpendicular.

[0049] The end plate 11 and the side plate 12 are detachably and fixedly connected by being clamped with each other through the clamping portion 14 and the clamping hole 13. Moreover, under the limitation of the clamping portion 14 and the clamping hole 13, the end plate 11 and the side plate 12 are limitedly connected in the horizontal plane and the vertical direction Z. Specifically, they can be limited in three directions: the first horizontal direction, the second horizontal direction, and the vertical direction Z.

[0050] Specifically, between the connected end plate 11 and side plate 12, they can be fixed by the clamping of a plurality of clamping portions 14 with the corresponding clamping holes 13. At this time, all the clamping portions 14 can be arranged on the end plate 11 or all arranged on the side plate 12; or part of the clamping portions 14 can be arranged on the end plate 11 and part of the clamping portions 14 can be arranged on the side plate 12.

[0051] Taking the cuboid-shaped battery cell 20 as an example, when using the battery packaging structure in the embodiments of the present application to package a group of battery cells 20, the process is generally as follows: first, a plurality of battery cells 20 are arranged in a row along their thickness direction to form a battery cell group, and then the two end plates 11 are arranged at both ends of the battery cell group in the thickness direction, and finally each side plate 12 is installed on the end plate 11 through the clamping of the clamping hole 13 and the clamping portion 14.

[0052] The above-mentioned battery packaging structure 10 has a detachable connection between the end plate 11 and the side plate 12 by means of snap connection between the snap holes 13 and the snap portions 14. This connection is not only reliable but also facilitates the disassembly and assembly of the module. At the same time, the end plate 11 and the side plate 12 are limited simultaneously in the horizontal plane and the vertical direction Z only by the snap holes 13 and the snap portions 14. This not only makes the connection between the two more reliable but also simplifies the structure of the battery packaging structure 10.

[0053] Figure 4 is Figure 1 a schematic structural diagram of the end plate in the battery module shown. Figure 5 is Figure 1 a schematic structural diagram of the side plate in the battery module shown. Figure 6 is Figure 4 an enlarged view of B in

[0054] In some embodiments, referring to Figure 4 , Figure 5 and Figure 6 , the snap portion 14 includes a snap hook 14a. The snap hook 14a includes a connecting section a1 and a hook section a2 that are bent and connected. The connecting section a1 is connected to one of the above, and there is a snap gap h formed between the hook section a2 and the one. In the state where the snap hook 14a is snap-connected to the snap hole 13, the connecting section a1 passes through the snap hole 13 of the other one, so that a part of the other one is located in the snap gap h, and the hook section a2 abuts the other one located in the snap gap h against one of them.

[0055] It should be noted that in the embodiments of the present application, for the sake of simplicity of description, "one of them" refers to one of the end plate 11 and the side plate 12, and "the other one" refers to the other one of the end plate 11 and the side plate 12. When the snap hook 14a is provided on one of the end plate 11 and the side plate 12, the snap hole 13 that cooperates with the snap hook 14a is provided on the other one of the end plate 11 and the side plate 12.

[0056] The snap hook 14a is hook-shaped and includes a connecting section a1 and a hook section a2. The hook section a2 is bent relative to the connecting section a1. The connecting section a1 is used to connect to "one of them", and there is a snap gap h formed between the hook section a2 and "one of them".

[0057] During the actual installation process, after the hook section a2 of the snap hook 14a passes through the snap hole 13, the connecting section a1 remains in the snap hole 13. With the cooperation between the connecting section a1 and the snap hole 13, it is possible to prevent the side plate 12 and the end plate 11 from separating in the first horizontal direction and the vertical direction Z, realizing the limitation of the two in these two directions.

[0058] In addition, the hook 14a limits a part of the "other one" where the engaging hole 13 is located within the engaging gap h, and the hook section a2 presses the "other one" located within the engaging gap h against the "one", so as to achieve the limitation of the end plate 11 and the side plate 12 in the second horizontal direction.

[0059] At this time, through the cooperation of the hook 14a and the engaging hole 13, the side plate 12 and the end plate 11 can be simultaneously limited in the horizontal plane and the vertical direction Z, and the structure is simple and easy to implement.

[0060] Specifically, the hook 14a protrudes substantially in the horizontal direction on the "one", so that the occupied space of the battery module 100 in the vertical direction can be reduced, which is beneficial to the internal space layout of the battery pack and improves the space utilization rate of the battery pack. Figure 1 and Figure 2 In the illustrated embodiment, the hook 14a protrudes along the extending direction of the end plate 11 at the end of the end plate 11. Of course, in other embodiments, the hook 14a may also protrude in the vertical direction Z on the "one".

[0061] In other embodiments, in addition to adopting the hook 14a for the engaging portion 14, other conventional settings may also be adopted. By way of example, the engaging portion 14 includes a fixed section and a fastening section. The fixed section is inserted into the engaging hole 13, and the fastening section is detachably fastened to the fixed section located within the engaging hole 13, and the fastening section cannot pass through the engaging hole 13, and the side plate 12 and the end plate 11 are pressed to prevent the engaging portion 14 from coming out.

[0062] Specifically in the embodiment, referring to Figure 2 , hooks 14a are provided at both ends where two end plates 11 are connected to the same side plate 12, and the hook sections a2 of the hooks 14a on both ends extend away from each other; and / or, hooks 14a are provided at both ends where two side plates 12 are connected to the same end plate 11, and the hook sections a2 of the hooks 14a on both ends extend away from each other.

[0063] Taking Figure 2 as an example, when hooks 14a are provided at both ends where two end plates 11 are connected to the same side plate 12, the hook sections a2 of the hooks 14a extend away from each other. When the battery cells 20 are grouped, first, the engaging hole 13 at one end of the side plate 12 is engaged with the hook 14a (referred to as the first hook 14a) on one of the end plates 11, and then the engaging hole 13 at the other end of the side plate 12 is engaged with the hook 14a (referred to as the second hook 14a) on the other end plate 11. Since the first hook 14a and the second hook 14a extend away from each other, when the other end of the side plate 12 is engaged with the end plate 11, the first hook 14a can firmly hook the engaging hole 13 on the side plate 12, so that the side plate 12 is not easily separated from the end plate 11 during the installation process, and it is more convenient to assemble the side plate 12.

[0064] Further to the embodiments, refer to Figure 3 and Figure 6 , in the state where the hook 14a is engaged with the engagement hole 13, the inner side surface of the connecting section a1 is in contact with the hole wall of the engagement hole 13, and the outer side surface of the connecting section a1 is spaced from the hole wall of the engagement hole 13.

[0065] The inner side surface of the connecting section a1 refers to the surface located inside the configuration of the hook 14a, and the outer side surface of the connecting section a1 refers to the surface located outside the hook shape of the hook 14a.

[0066] In the state where the hook 14a is engaged with the engagement hole 13, the inner side surface of the connecting section a1 is in contact with the hole wall of the engagement hole 13, while its outer side surface is spaced from the hole wall of the engagement hole 13, indicating that the thickness between the inner side surface and the outer side surface of the connecting section a1 is smaller than the width of the engagement hole 13, so as to facilitate the hook section a2 to pass through the engagement hole 13. Secondly, the inner side surface of the connecting section a1 is in contact with the engagement hole 13. When the hook sections a2 of the hooks 14a at both ends of the side plate 12 extend away from each other, the hooks 14a at both ends can exert a limiting force on the side plate 12 in the extending direction of the hook section a2 in the reverse direction, so as to make the limit between the side plate 12 and the end plate 11 in the first horizontal direction closer.

[0067] In some embodiments, refer to Figure 6 , an inclined surface m is formed at the free end of the hook section a2, and the inclined surface m forms a part of the inner wall of the engaging gap h, and the distance from the inclined surface m to one of the above gradually increases in the direction in which the hook section a2 extends away from the connecting section a1. That is, an engaging gap h with an increasing opening is formed between the inclined surface m and "one of them". In this way, when the hook section a2 passes through the engagement hole 13, under the guidance of the inclined surface m, the hook section a2 is more easily engaged into the engagement hole 13.

[0068] In some embodiments, the engaged engaging portions 14 and the engagement holes 13 form an engaging group, and the connected end plate 11 and side plate 12 are connected via a plurality of engaging groups arranged at intervals in the vertical direction Z.

[0069] At this time, the end plate 11 and the side plate 12 are engaged by a plurality of engaging groups, and the limit between them is more reliable. In the Figure 1 and Figure 2 shown embodiments, each end plate 11 and each side plate 12 are connected by two engaging groups.

[0070] In some embodiments, at least one end of the end plate 11 in the vertical direction Z is provided with a mounting position k for mounting on an external structure.

[0071] Specifically, the mounting position k can be a welding position, a clamping position, a fastening position, etc.

[0072] In practical applications, after the battery cell 20 is encapsulated by the battery encapsulation structure 10 to form the battery module 100, the battery module 100 can be fixed on the crossbeam of the battery pack box body through the installation position k on the end plate 11, so as to fix the position of the battery module 100 in the battery pack.

[0073] Specifically in the embodiment, the end plate 11 includes a concave hole 11a recessed away from the fixing space 10a. A vertically arranged vertical reinforcing strip 11b is arranged in the concave hole 11a. The installation position k includes an installation hole k1 extending from the end of the end plate 11 to the inside of the vertical reinforcing strip 11b.

[0074] The arrangement of the concave hole 11a can reduce the consumption of materials of the end plate 11 and the weight of the end plate 11, thereby reducing the weight of the battery module 100, which helps to realize the lightweight of the battery pack. The vertical reinforcing strip 11b is arranged in the concave hole 11a, and the vertical reinforcing strip 11b vertically supports the hole wall of the concave hole 11a. The installation hole k1 extends to the inside of the vertical reinforcing strip 11b. The arrangement of the vertical reinforcing strip 11b increases the local thickness of the end plate 11, and the installation hole k1 is arranged at the thickened position to be connected with the external structure, which can improve the connection reliability between the end plate 11 and the external structure.

[0075] In other embodiments, a horizontal reinforcing strip 11c can also be arranged in the concave hole 11a. The horizontal reinforcing strip 11c is cross-connected with the vertical reinforcing strip 11b to further improve the strength of the end plate 11.

[0076] In addition, the battery module 100 provided in the embodiment of the present application includes the battery encapsulation structure 10 and a plurality of battery cells 20 in the above embodiment, and all the battery cells 20 are fixed in the fixing space 10a. The battery module 100 has the beneficial effect of being convenient for disassembly and assembly.

[0077] Specifically in the embodiment, a plurality of battery cells 20 are arranged in sequence along the extending direction of the side plate 12. The battery module 100 includes a buffer member 30. A buffer space is arranged between two adjacent battery cells 20, and / or a buffer member 30 is arranged between the battery cell 20 and the end plate 11.

[0078] The buffer member 30 can be a buffer pad or a buffer column, which is usually but not limited to a flexible material, such as rubber or silica gel. Usually, the thickness of the buffer member 30 is relatively thin to reduce the space it occupies inside the battery.

[0079] During the grouping process of the battery module 100, after arranging the battery cells 20 in sequence along the extension direction of the side plates 12, they are placed between the two end plates 11, and buffer members 30 are arranged between the battery cells 20 and / or between the battery cells 20 and the end plates 11; one end of the side plate 12 is clamped with one of the end plates 11, and then a stacking tooling is used to apply pressure to the two end plates 11. The buffer members 30 are compressed to store pressure, so that the total distance between the two end plates 11 is reduced; then, the other end of the side plate 12 is clamped with the other end plate 11; the pressure of the stacking tooling is removed, the buffer members 30 recover and release the pressure, so that the total distance between the end plates 11 becomes larger, and the side plate 12 is tightened by the two end plates 11, which not only makes the side plate 12 tightly clamped with the two end plates 11, but also realizes the tight encapsulation of the battery cells 20.

[0080] When the battery module 100 needs to be disassembled and assembled, first use the stacking tooling to apply pressure to the two end plates 11, so that the buffer members 30 are compressed and thinned to release the pulling force of the end plates 11 acting on the side plate 12, so that the side plate 12 can be smoothly disengaged from the end plates 11.

[0081] In this way, under the action of the buffer members 30, the end plates 11 and the side plate 12 are not only clamped more firmly, but also the end plates 11 and the side plate 12 can fix the battery cells 20 more tightly, and the structure of the battery module 100 is more reliable. At the same time, the setting of the buffer members 30 can absorb the expansion deformation of the battery cells 20 when the battery cells 20 expand later.

[0082] In addition, the embodiment of the present application also provides a battery pack, which includes a box body and the battery module 100 in the above embodiment, and the battery module 100 is accommodated in the box body.

[0083] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0084] The above embodiments only represent several implementation manners of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A battery packaging structure (10), characterized in that: The battery packaging structure (10) comprises: two end plates (11); Two side plates (12), both ends of each of the side plates (12) being respectively connected to the end plates (11) so as to jointly enclose and form a fixed space (10a) for fixing the battery cell (20); Among them, one of each of the connected end plate (11) and the side plate (12) is provided with a clamping portion (14), and the other is provided with a clamping hole (13); the clamping portion (14) and the clamping hole (13) are detachably clamped, and the end plate (11) and the side plate (12) are connected in a horizontal and vertical direction with upper limits.

2. The battery packaging structure (10) according to claim 1, characterized in that: The clamping portion (14) comprises a clamping hook (14a), the clamping hook (14a) comprises a connecting section (a1) and a hook section (a2) connected by bending, the connecting section (a1) is connected to one of the two, and a clamping gap (h) is formed between the hook section (a2) and the two. When the hook (14a) is engaged with the engaging hole (13), the connecting section (a1) passes through the engaging hole (13) of the other one so that a portion of the other one is located in the engaging gap (h), and the hook section (a2) presses the other one located in the engaging gap (h) against the one of the two.

3. The battery packaging structure (10) according to claim 2, characterized in that: The hooks (14a) are provided at both ends of the two end plates (11) connected to the same side plate (12), and the hook sections (a2) of the hooks (14a) at the two ends extend in opposite directions; and / or, The hooks (14a) are provided at both ends of the two side plates (12) connected to the same end plate (11), and the hook sections (a2) of the hooks (14a) at the two ends extend in opposite directions.

4. The battery packaging structure (10) according to claim 3, characterized in that: When the hook (14a) is engaged with the engaging hole (13), the inner side surface of the connecting section (a1) fits against the hole wall of the engaging hole (13), and the outer side surface of the connecting section (a1) is spaced apart from the hole wall of the engaging hole (13).

5. The battery packaging structure (10) according to claim 2, characterized in that: The free end of the hook section (a2) is formed with an inclined surface (m), and the inclined surface (m) forms part of the inner wall of the engaging gap (h); the distance from the inclined surface (m) to one of the two gradually increases in the direction in which the hook section (a2) extends away from the connecting section (a1).

6. The battery packaging structure (10) according to claim 1, characterized in that: The clamping parts (14) and the clamping holes (13) that are clamped together form a clamping group; the connected end plates (11) and side plates (12) are connected via a plurality of groups of the clamping groups that are spaced apart in the vertical direction.

7. The battery packaging structure (10) according to claim 1, characterized in that: At least one end of the end plate (11) in the vertical direction is provided with a mounting position (k) for mounting on an external structure; The end plate (11) comprises a recessed hole (11a) disposed away from the fixed space (10a), a vertical reinforcement strip (11b) disposed vertically in the recessed hole (11a), and the mounting position (k) comprises a mounting hole (k1) extending from the end of the end plate (11) to the inside of the vertical reinforcement strip (11b).

8. A battery module (100), characterized in that: The battery module (100) comprises: The battery packaging structure (10) according to any one of claims 1 to 7; and A plurality of battery cells (20), all of the battery cells (20) are fixed in the fixed space (10a).

9. The battery module (100) according to claim 8, characterized in that: A plurality of battery cells (20) are arranged in sequence along the extension direction of the side plate (12); the battery module (100) comprises a buffer (30), wherein the buffer (30) is arranged between two adjacent battery cells (20), and / or the buffer (30) is arranged between the battery cell (20) and the end plate (11).

10. A battery pack, characterized in that: include: Box; as well as The battery module (100) as claimed in claim 8 or 9 is accommodated in the box.

Images