Battery packaging structure and battery

Abstract

The utility model discloses a battery packaging structure and a battery. The battery packaging structure includes a shell, a separator, a first pole and a second pole, the shell is provided with a receiving hole, and a plurality of shells are connected in sequence along a first direction. The separator connects at least one of the adjacent shells, and the separator covers the receiving holes of the adjacent shells. The first pole is connected to the shell, and the first pole extends to the receiving hole along a second direction perpendicular to the first direction. The second pole is connected to the shell, and the second pole extends to the receiving hole along the second direction, and the polarity of the second pole is opposite to that of the first pole. A plurality of shells can accommodate a plurality of battery cells, and a corresponding number of shells are selected to load the battery cells according to the power requirements, and the first pole and the second pole connected to each shell are used to realize the series or parallel connection of each battery cell, so that batteries with different performances can be quickly prepared, and the common separator between adjacent shells can realize the sealing of the receiving hole, thereby reducing the space occupied by the packaging structure.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery packaging structure and a battery. Background Art

[0002] Different electrical appliances have different power requirements, and multiple battery cells need to be connected in series or in parallel to make the battery meet the usage requirements. The relevant technology meets the power requirements by connecting multiple single batteries in series or in parallel to form a battery pack. The packaging structure takes up too much space and affects the energy density. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a battery packaging structure, which can facilitate the preparation of batteries with different performance requirements and ensure the energy density of the battery.

[0004] The utility model also provides a battery with the battery packaging structure.

[0005] According to the battery packaging structure of the embodiment of the utility model, it includes a shell, a separator, a first pole and a second pole, the shell is provided with a accommodating hole, the accommodating hole is used to accommodate a battery cell, and a plurality of the shells are connected in sequence along a first direction; the separator is connected to at least one of the adjacent shells, and the separator covers the accommodating hole of the adjacent shells; the first pole is connected to the shell for electrically connecting to the battery cell, the first pole extends to the accommodating hole along a second direction, and the second direction is perpendicular to the first direction; the second pole is connected to the shell for electrically connecting to the battery cell, the second pole extends to the accommodating hole along a second direction, and the polarity of the second pole is opposite to that of the first pole.

[0006] The battery packaging structure according to the embodiment of the utility model has at least the following beneficial effects: multiple shells can accommodate multiple battery cells, and a corresponding number of shells are selected to load the battery cells according to the power requirements, and the battery cells are connected in series or in parallel through the first pole and the second pole connected to each shell, so that batteries with different performances can be quickly prepared, and the sharing of separators between adjacent shells can realize the sealing of the accommodating holes, thereby reducing the space occupied by the packaging structure and ensuring the energy density of the battery.

[0007] According to some embodiments of the present invention, the partition is located between adjacent shells, and the partition connects adjacent shells.

[0008] According to some embodiments of the utility model, the battery packaging structure also includes a cover seal, and the shells located at both ends of the first direction are respectively connected to the cover seals, and the cover seal and the partition are respectively located on opposite sides of the shell in the first direction, and the cover seal seals the accommodating hole.

[0009] According to some embodiments of the present invention, each of the shells and each of the partitions are connected one by one to form an integral structure, and the partitions separate adjacent accommodating holes.

[0010] According to some embodiments of the utility model, the battery packaging structure has a first side and a second side relative to each other in the first direction, and the battery packaging structure also includes a cover seal, the cover seal is connected to the shell at the end of the first side in the first direction, the cover seal covers the accommodating hole, and the accommodating hole is arranged between the cover seal and the partition; in the shell at the end of the second side, the partition is located on the side of the shell facing the second side.

[0011] According to some embodiments of the present invention, the shell is made of metal.

[0012] According to some embodiments of the utility model, the shell includes a main body and a welding portion, the main body is provided with the accommodating hole, the welding portion is connected to the outer peripheral edge of the main body, the welding portion protrudes from the main body in a direction perpendicular to the first direction, and the welding portion is welded to the separator; or, the battery packaging structure also includes a cover seal, the shell located at both ends of the first direction are respectively connected to the cover seal, the cover seal and the separator are respectively located on opposite sides of the shell in the first direction, the cover seal covers the accommodating hole, the main body is provided with the welding portions on both sides in the first direction, and one of the welding portions is welded to the cover seal.

[0013] According to some embodiments of the present invention, the shell includes a main body and a welding portion, the main body is provided with the accommodating hole, the welding portion is connected to the outer peripheral edge of the main body, the welding portion protrudes from the main body in a direction perpendicular to the first direction, the welding portion is welded to the separator, the welding portion and the separator have a first weld on the outer surface in the first direction, the first weld surrounds the welding portion and the separator, and the first weld has a set size L1 in the second direction, satisfying: 20μm≤L1≤250μm; or, the battery packaging structure also includes a cover seal, located The shells at both ends of the first direction are respectively connected with the cover seals, the cover seals and the partition are respectively located on opposite sides of the shell in the first direction, the cover seals seal the accommodating hole, the main body is provided with the welding parts on both sides in the first direction, one of the welding parts is welded to the cover seal, the cover seal and the correspondingly connected welding parts have a second weld on the outer surface in the first direction, the second weld surrounds the welding part and the partition, and the second weld has a set size L2 in the second direction, satisfying: 20μm≤L2≤250μm.

[0014] According to some embodiments of the present invention, the shell includes a main body, the main body is provided with the accommodating hole, and the shell has a set thickness D in a direction perpendicular to the first direction, satisfying: 75μm≤D≤600μm.

[0015] A battery according to an embodiment of the utility model comprises a battery cell and a battery packaging structure according to any of the above embodiments, wherein the battery cells are arranged in each of the accommodating holes, and the battery cells comprise a first pole ear and a second pole ear, wherein the first pole ear is connected to the first pole column, and the second pole ear is connected to the second pole column, and the polarities of the first pole ear and the second pole ear are opposite.

[0016] The battery according to the embodiment of the utility model has at least the following beneficial effects: by using the battery packaging structure of the embodiment of the present application, batteries that meet different performance requirements can be quickly prepared, production efficiency can be improved, and the energy density of the battery can be ensured.

[0017] According to some embodiments of the utility model, the first pole lug of the battery cell is connected to the second pole lug of the adjacent battery cell, and the second pole lug of the battery cell is connected to the first pole lug of the adjacent battery cell; or, the first pole lug of the battery cell is connected to the first pole lug of the adjacent battery cell, and the second pole lug of the battery cell is connected to the second pole lug of the adjacent battery cell.

[0018] According to some embodiments of the present invention, the outer surface of the battery core is covered with an insulating film.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 A schematic diagram of a battery according to an embodiment of the present utility model;

[0022] Figure 2 A schematic diagram of a battery according to an embodiment of the present invention from another perspective;

[0023] Figure 3 FIG. 1 is a schematic diagram of a battery according to another embodiment of the present invention.

[0024] Reference numerals:

[0025] The housing 100 , the receiving hole 110 , the main body 120 , the welding part 130 , the separator 200 , the cover 300 , the first pole 400 , the second pole 500 , the battery cell 600 , the first pole tab 610 , and the second pole tab 620 . DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0027] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In the description of the present utility model, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0030] In the description of the utility model, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0031] The battery packaging structure and battery of the embodiment of the present application are described below with reference to the specification. It should be noted that the first direction is shown in the left-right direction in the drawings, the left side is the second side, the right side is the first side, and the second direction is shown in the up-down direction. For ease of display, Figure 2 The dividers are hidden in the .

[0032] Reference Figure 1 and Figure 2 According to the battery packaging structure of the embodiment of the utility model, it includes a shell 100, a separator 200, a first pole 400 and a second pole 500. The shell 100 is provided with a receiving hole 110, and the receiving hole 110 is used to receive the battery cell 600. The multiple shells 100 are connected in sequence along the first direction. The separator 200 connects at least one of the adjacent shells 100, and the separator 200 covers the receiving hole 110 of the adjacent shell 100. The first pole 400 is connected to the shell 100 for electrically connecting with the battery cell 600. The first pole 400 extends to the receiving hole 110 along the second direction, and the second direction is perpendicular to the first direction. The second pole 500 is connected to the shell 100 for electrically connecting with the battery cell 600. The second pole 500 extends to the receiving hole 110 along the second direction, and the polarity of the second pole 500 and the first pole 400 are opposite.

[0033] A plurality of shells 100 can accommodate a plurality of battery cells 600. A corresponding number of shells 100 are selected to load the battery cells 600 according to the power requirements, and the battery cells 600 are connected in series or in parallel through the first pole 400 and the second pole 500 connected to each shell 100. This allows rapid preparation of batteries with different performances, and the common partition 200 between adjacent shells 100 can achieve the sealing of the accommodating hole 110, thereby reducing the space occupied by the packaging structure and ensuring the energy density of the battery.

[0034] Reference Figure 1 and Figure 2In some embodiments, the separator 200 is located between adjacent shells 100, and the separator 200 connects adjacent shells 100. The shell 100 and the separator 200 can be prepared separately, and the shell 100 is connected to both sides of the separator 200 respectively, so that two adjacent receiving holes 110 are separated by a single separator 200. And the separate setting of the shell 100 and the separator 200 facilitates the batch preparation of the shell 100 and the separator 200, and the battery packaging structure of the battery that meets different performance requirements can be formed by connecting them one by one according to actual needs, reducing the difficulty of production and realizing modularization. Specifically, the separator 200 and can be connected by welding.

[0035] Reference Figure 1 Furthermore, the battery packaging structure also includes a cover seal 300, and the shells 100 located at both ends of the first direction are respectively connected with the cover seal 300, and the cover seal 300 and the separator 200 are respectively located on the opposite sides of the shell 100 in the first direction, and the cover seal 300 seals the receiving hole 110. Among them, the receiving holes 110 of other shells 100 located between the shells 100 at the two ends can be sealed by the separator 200, so as to facilitate the subsequent processes such as liquid injection and formation of the battery cell 600. The receiving holes 110 of the shells 100 located at the two ends have one side exposed in the first direction. The exposed receiving holes 110 are connected to the shell 100 by the cover seal 300, so as to seal the receiving holes 110 of the shells 100 at the two ends. Among them, the cover seal 300 can be connected to the shell 100 by welding. The cover seal 300 can also be connected to the shell 100 as an integral structure, that is, the cover seal 300 is formed during the preparation process of the shell 100, for example, by opening a countersink on the raw material of the shell 100 to make the shell 100 C-shaped, so as to cover the accommodating hole 110 on one side, and the C-shaped shell 100 can be located at both ends of the first direction during assembly.

[0036] Reference Figure 3 In some embodiments, the battery packaging structure has a first side and a second side opposite to each other in the first direction, and each housing 100 and each separator 200 are connected one by one to form an integral structure, and the separator 200 separates adjacent receiving holes 110. By connecting the housing 100 and the separator 200 to form an integral structure, the housing 100 can be made into a C-shape as a whole, and the receiving hole 110 can be made into a countersunk hole style, so as to achieve a single-sided sealing of the receiving hole 110. During assembly, the housings 100 are connected in sequence, and the separators 200 on each housing 100 are located on the second side relative to the housing 100, so that the adjacent receiving holes 110 can be separated by the separator 200, and the sealing of the receiving holes 110 can be achieved.

[0037] Among them, the receiving hole 110 of one of the shells 100 located at the end of the first side in the first direction will be exposed. In order to seal the receiving hole 110, a cover seal 300 is provided in the battery packaging structure. The cover seal 300 is connected to the shell 100 located at the end of the first side, so that the receiving hole 110 is located between the cover seal 300 and the partition 200, and the cover seal 300 covers the receiving hole 110, thereby achieving the sealing of the receiving hole 110.

[0038] In some embodiments, the material of the shell 100 is metal. The metal shell 100 has higher strength. Compared with other materials such as plastic, it can have sufficient strength for protection and support while being thinner, which can reduce the overall space occupied by the battery packaging structure and further improve the energy density.

[0039] Reference Figure 1 and Figure 2 Further, the housing 100 includes a main body 120 and a welding portion 130, the main body 120 is provided with a receiving hole 110, the welding portion 130 is connected to the outer peripheral edge of the main body 120, the welding portion 130 protrudes from the main body 120 in a direction perpendicular to the first direction, and the welding portion 130 is welded to the partition 200. The welding portion 130 is equivalent to forming a flange structure, which can facilitate welding and ensure the welding effect. Among them, in the embodiment provided with a cover seal 300, the main body 120 can be provided with welding portions 130 on both sides of the first direction, and the two welding portions 130 are respectively welded to the partition 200 and the cover seal 300. Specifically, the welding portion 130 can only surround a portion of the outer peripheral edge of the main body 120, or extend in a ring shape to surround the main body 120.

[0040] Reference Figure 2 As another improvement of the above scheme, the shell 100 includes a main body 120, the main body 120 is provided with a receiving hole 110, and the shell 100 has a set thickness D in a direction perpendicular to the first direction, satisfying: 75μm≤D≤600μm. In the range where D is greater than 75 microns, the shell 100 can have sufficient thickness to ensure structural strength to reduce the probability of deformation of the battery packaging structure, ensure the assembly of the battery cell 600 and the protection of the battery cell 600. In the range where D is less than 600μm, the space occupation of the shell 100 can be reduced as much as possible while having a high structural strength, so as to reduce the space occupation of the entire battery packaging structure and further improve the energy density. Specifically, D can be selected as 75μm, 100μm, 200μm, 300μm, 400μm, 500μm, 600μm or any value within 75μm to 600μm.

[0041] Reference Figure 1In some embodiments, the housing 100 includes a main body 120 and a welding portion 130, the main body 120 is provided with a receiving hole 110, the welding portion 130 is connected to the outer peripheral edge of the main body 120, the welding portion 130 protrudes from the main body 120 in a direction perpendicular to the first direction, the welding portion 130 is welded to the separator 200, the welding portion 130 and the separator 200 have a first weld on the outer surface in the first direction, the first weld surrounds the welding portion 130 and the separator 200, and the first weld has a set size L1 in the second direction, satisfying: 20μm≤L1≤250μm. The first weld is kept within the range of 20μm to 250μm, which can ensure reliable welding without occupying too much space, so as to facilitate welding and ensure welding effect. The size L1 of the first weld can be specifically selected to be 20 μm, 40 μm, 60 μm, 80 μm, 100 μm, 120 μm, 140 μm, 160 μm, 180 μm, 200 μm, 220 μm, 240 μm, 250 μm or any value between 20 μm and 250 μm.

[0042] Alternatively, in some embodiments, the battery packaging structure further includes a cover seal 300, the shell 100 at both ends in the first direction is connected with the cover seal 300, the cover seal 300 and the separator 200 are respectively located on the opposite sides of the shell 100 in the first direction, the cover seal 300 covers the accommodating hole 110, and the main body 120 is provided with welding parts 130 on both sides in the first direction, one of the welding parts 130 is welded to the cover seal 300, and the cover seal 300 and the correspondingly connected welding part 130 have a second weld on the outer surface in the first direction, the second weld surrounds the welding part 130 and the separator 200, and the second weld has a set size L2 in the second direction, satisfying: 20μm≤L2≤250μm. Similarly, the second weld is kept in the range of 20μm to 250μm, which can ensure reliable welding without occupying too much space, so as to facilitate welding and ensure welding effect. The size L2 of the second weld can be specifically selected to be 20 μm, 40 μm, 60 μm, 80 μm, 100 μm, 120 μm, 140 μm, 160 μm, 180 μm, 200 μm, 220 μm, 240 μm, 250 μm or any value between 20 μm and 250 μm.

[0043] It is understandable that, depending on the welding conditions, the first weld and the second weld may be formed into a groove or a protrusion. When it is a groove, the dimensions of L1 and L2 are the groove depth. When it is a protrusion, the dimensions of L1 and L2 are the height of the protrusion.

[0044] Reference Figure 1 and Figure 2According to the battery of the embodiment of the utility model, the battery comprises a battery cell 600 and a battery packaging structure of any of the above embodiments, wherein each of the accommodating holes 110 is provided with a battery cell 600, and the battery cell 600 comprises a first pole ear 610 and a second pole ear 620, wherein the first pole ear 610 is connected to the first pole column 400, and the second pole ear 620 is connected to the second pole column 500, and the polarity of the first pole ear 610 is opposite to that of the second pole ear 620. The battery packaging structure of the embodiment of the present application is generally applied, and batteries meeting different performance requirements can be quickly prepared, production efficiency can be improved, and the energy density of the battery can be ensured.

[0045] Reference Figure 2 In some embodiments, the first pole tab 610 of the battery cell 600 is connected to the second pole tab 620 of the adjacent battery cell 600, and the second pole tab 620 of the battery cell 600 is connected to the first pole tab 610 of the adjacent battery cell 600, so as to realize the series connection of each battery cell 600, increase the voltage of the battery, and meet the voltage requirement of the battery. Alternatively, in some embodiments, the first pole tab 610 of the battery cell 600 is connected to the first pole tab 610 of the adjacent battery cell 600, and the second pole tab 620 of the battery cell 600 is connected to the second pole tab 620 of the adjacent battery cell 600, so as to realize the parallel connection of each battery cell 600, increase the total current of the battery, and improve the battery capacity.

[0046] In some embodiments, the outer surface of the battery cell 600 is coated with an insulating film (not shown in the figure) to improve safety and reduce the possibility of short circuit. The insulating film can be independent of the battery cell 600, and after the battery cell 600 is formed, the insulating film is additionally coated on the outer surface of the battery cell 600. Alternatively, the insulating film can be a diaphragm used to separate the positive and negative electrode sheets in the battery cell 600, and the diaphragm is extended and coated on the outer surface of the battery cell 600 to improve safety. Alternatively, the insulating film can also be a ceramic coating, which achieves insulation by covering the outermost empty area of ​​the battery cell 600.

[0047] The embodiments of the utility model are described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the utility model. In addition, the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

Claims

1. A battery packaging structure, characterized in that: include: A shell, wherein the shell is provided with a receiving hole, the receiving hole is used to receive the battery cell, and a plurality of the shells are sequentially connected along a first direction; A separator, the separator is connected to at least one of the adjacent shells, and the separator covers the receiving hole of the adjacent shell; A first pole connected to the housing and used for being electrically connected to the battery cell, the first pole extending to the receiving hole along a second direction, the second direction being perpendicular to the first direction; The second pole is connected to the shell and is used to be electrically connected to the battery cell. The second pole extends to the receiving hole along the second direction. The polarity of the second pole is opposite to that of the first pole.

2. The battery packaging structure according to claim 1, characterized in that: The partition is located between adjacent shells, and the partition connects adjacent shells.

3. The battery packaging structure according to claim 2, characterized in that: It also includes a cover seal, which is connected to the shell at both ends of the first direction respectively, and the cover seal and the partition are located on opposite sides of the shell in the first direction respectively, and the cover seal covers the accommodating hole.

4. The battery packaging structure according to claim 1, characterized in that: Each of the shells and each of the partitions are connected one by one to form an integral structure, and the partitions space adjacent accommodating holes.

5. The battery packaging structure according to claim 4, characterized in that: The battery packaging structure has a first side and a second side opposite to each other in the first direction, and the battery packaging structure further comprises a cover seal, the cover seal is connected to the housing at an end portion of the first side, the cover seal covers the accommodating hole, and the accommodating hole is provided between the cover seal and the partition; In the shell located at the end of the second side, the partition is located on a side of the shell facing the second side.

6. The battery packaging structure according to claim 1, characterized in that: The material of the shell is metal.

7. The battery packaging structure according to claim 6, characterized in that: The shell comprises a main body and a welding part, the main body is provided with the accommodating hole, the welding part is connected to the outer peripheral edge of the main body, the welding part protrudes from the main body in a direction perpendicular to the first direction, and the welding part is welded to the separator; Alternatively, the battery packaging structure also includes a cover seal, and the shells located at both ends of the first direction are respectively connected to the cover seals, the cover seal and the partition are respectively located on opposite sides of the shell in the first direction, the cover seal seals the accommodating hole, and the welding parts are provided on both sides of the main body in the first direction, and one of the welding parts is welded to the cover seal.

8. The battery packaging structure according to claim 6, characterized in that: The shell comprises a main body and a welding part, the main body is provided with the accommodating hole, the welding part is connected to the outer peripheral edge of the main body, the welding part protrudes from the main body in a direction perpendicular to the first direction, the welding part is welded to the separator, the outer surfaces of the welding part and the separator in the first direction have a first weld, the first weld surrounds the welding part and the separator, and the first weld has a set size L1 in the second direction, satisfying: 20μm≤L1≤250μm; Alternatively, the battery packaging structure also includes a cover seal, the shell located at both ends of the first direction are respectively connected to the cover seal, the cover seal and the partition are respectively located on opposite sides of the shell in the first direction, the cover seal seals the accommodating hole, the main body is provided with the welding parts on both sides in the first direction, one of the welding parts is welded to the cover seal, the cover seal and the correspondingly connected welding parts have a second weld on the outer surface in the first direction, the second weld surrounds the welding part and the partition, and the second weld has a set size L2 in the second direction, satisfying: 20μm≤L2≤250μm.

9. The battery packaging structure according to claim 6, characterized in that: The shell includes a main body, the main body is provided with the accommodating hole, and the main body has a set thickness D in a direction perpendicular to the first direction, satisfying: 75 μm≤D≤600 μm.

10. A battery, characterized in that A battery cell and a battery packaging structure as claimed in any one of claims 1 to 9, wherein the battery cell is arranged in each of the accommodating holes, and the battery cell comprises a first pole lug and a second pole lug, wherein the first pole lug is connected to the first pole column, and the second pole lug is connected to the second pole column, and the polarities of the first pole lug and the second pole lug are opposite.

11. The battery according to claim 10, characterized in that The first pole lug of the battery cell is connected to the second pole lug of the adjacent battery cell, and the second pole lug of the battery cell is connected to the first pole lug of the adjacent battery cell; or, the first pole lug of the battery cell is connected to the first pole lug of the adjacent battery cell, and the second pole lug of the battery cell is connected to the second pole lug of the adjacent battery cell.

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