Battery and battery pack

Abstract

The utility model relates to the technical field of new energy, in particular to a battery and a battery pack, and aims to solve the problem that the sealing and fixing effects of a connecting part of an existing battery shell are affected due to dislocation in the moving process. Therefore, the battery provided by the utility model comprises the shell assembly and the battery core assembly arranged in the shell assembly, the shell assembly comprises a shell and a connecting part surrounding the shell, the connecting part is provided with a plurality of welding parts which are arranged at intervals, and the welding parts which are arranged at intervals are arranged on the connecting part, so that a stable pre-fixing effect on the shell assembly is achieved; the end face alignment degree of the connecting part is prevented from being affected in the process of moving such as process transfer, and then the sealing and fixing effect of the shell assembly is prevented from being affected.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy, and specifically provides a battery and a battery pack. Background Art

[0002] As environmental pollution worsens, people are paying more and more attention to environmental protection, which has led to the rapid development of the new energy industry, including batteries.

[0003] Existing batteries typically include a housing and a cell housed within it. The housing further comprises an upper housing, a lower housing, and a separator located between the two. The upper housing has an upper flange, and the lower housing has a lower flange. The upper flange, the edges of the separator, and the lower flange are abutted against each other and then welded to secure the housing. However, the upper flange, the edges of the separator, and the lower flange require a process shift before welding, resulting in misalignment between the upper and lower flanges and the separator edge, affecting the effectiveness of the housing weld.

[0004] Therefore, this field needs a new technical solution to solve the above problems. Utility Model Content

[0005] The utility model aims to solve the above technical problem, that is, to solve the problem that the connection part of the existing battery shell is misaligned during movement, thereby affecting the sealing and fixing effect thereof.

[0006] In a first aspect, the present invention provides a battery comprising a shell assembly and a cell assembly disposed in the shell assembly, wherein the shell assembly comprises a shell and a connecting portion surrounding an edge of the shell, wherein the connecting portion is provided with a plurality of spaced-apart welding portions.

[0007] When the above technical solution is adopted, a plurality of spaced-apart welding portions are provided on the connection portion, thereby providing a stable pre-fixation effect on the shell assembly, preventing the shell assembly from affecting the end face alignment of the connection portion during movement such as process transfer, thereby affecting the sealing and fixing effect of the shell assembly.

[0008] In a preferred technical solution of the above battery, the shell includes a first outer shell and a second outer shell, the connecting portion includes a first extending portion provided on the first outer shell and a second extending portion provided on the second outer shell, and the first extending portion and the second extending portion are connected via the welding portion.

[0009] In a preferred technical solution of the above battery, the shell further includes a partition arranged between the first outer shell and the second outer shell, the connecting portion further includes an edge of the partition, and the first extension portion, the edge of the partition and the second extension portion are connected by the welding portion.

[0010] In a preferred technical solution of the above battery, the length of the welding portion is h, wherein 1 mm ≤ h ≤ 10 mm.

[0011] In the preferred technical solution of the above battery, 3mm≤h≤5mm.

[0012] In a preferred technical solution of the above battery, the distance between two adjacent welding portions is d1, wherein 10 mm ≤ d1 ≤ 100 mm.

[0013] In a preferred technical solution of the above battery, the distance between the welding portion and the outer end surface of the connecting portion is d2, wherein 0mm≤d2≤1.5mm.

[0014] In a preferred technical solution of the above battery, the welding portion is provided on an end surface of the connecting portion in the first direction.

[0015] In the preferred technical solution of the above-mentioned battery, the battery cell assembly includes a first battery cell arranged between the first shell and the partition and a second battery cell arranged between the second shell and the partition, and the partition is provided with a conductive column, and the two ends of the conductive column are respectively connected to the first battery cell and the second battery cell.

[0016] In a second aspect, the present invention further provides a battery pack comprising the above-mentioned battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0018] Figure 1 It is a three-dimensional diagram of the battery of the present utility model;

[0019] Figure 2 It is an exploded view of the battery of the present utility model;

[0020] Figure 3 It is a three-dimensional diagram of the separator and the conductive column of the battery of the present invention;

[0021] Figure 4 It is a top view of the battery of the present utility model;

[0022] Figure 5 yes Figure 4 A cross-sectional view taken along line AA shown;

[0023] Figure 6 yes Figure 5 A partial enlarged view is shown.

[0024] List of reference numerals:

[0025] 100. Battery; 1. First outer shell; 11. First cavity; 12. First pole; 13. First extension; 2. Second outer shell; 21. Second cavity; 22. Second pole; 23. Second extension; 3. Partition; 31. Edge; 4. First cell; 5. Second cell; 6. Conductive column; 61. Insulator; 7. Welding portion. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0027] It should be noted that in the description of this utility model, terms such as "inside," "outside," "upper," "lower," "top," "bottom," "left," "right," "front," and "back" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or component described must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] Furthermore, it should be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "connected," and "installed" should be understood in a broad sense, for example, to refer to fixed connections, detachable connections, or integral connections. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0029] Specifically, see first Figures 1 to 6 , Figure 1 This is a three-dimensional diagram of the battery of the present invention. Figure 2 This is an exploded view of the battery of the utility model. Figure 3 This is a three-dimensional diagram of the separator and conductive column of the battery of the utility model. Figure 4 This is a top view of the battery of the present invention. Figure 5 yes Figure 4 The cross-sectional view of line AA is shown. Figure 6 yes Figure 5 A partial enlarged view is shown.

[0030] In one embodiment, if Figures 1 to 6 As shown, a battery 100 of the present invention includes a shell assembly and a cell assembly disposed in the shell assembly.

[0031] Preferably, the shell assembly can be a rectangular parallelepiped, or a cylinder or other geometric body, which is not specifically limited here, and the user can choose to set it according to needs.

[0032] More preferably, the housing assembly may be made of aluminum, steel, aluminum-plastic film or other materials, and the user may select and set the material according to needs, which is not specifically limited here.

[0033] More preferably, the battery cell assembly is disposed in the shell assembly, and the battery cell assembly may be a wound battery cell, or a laminated battery cell, etc., which is not specifically limited here.

[0034] In one embodiment, the housing assembly includes a housing and a connecting portion surrounding an edge of the housing.

[0035] Preferably, the housing may be a combination of an outer shell and a cover plate, or may be composed of a plurality of outer shells fixedly connected to each other.

[0036] More preferably, the connecting portion is arranged around the edge of the shell, so that the shell can be sealed and fixed, ensuring the sealing effect of the shell.

[0037] More preferably, the edge of the shell is the connection between the shell and the cover plate or the connection between multiple shells. For example, when the shell is a combination of a shell and a cover plate, the shell has an opening, and the cover plate is used to cover the opening to achieve sealing of the shell. At this time, the edge of the shell is the connection position between the shell and the cover plate, that is, the edge of the shell opening; or when the shell is two shells, the two shells have openings and are opposite to each other, and the two shells are fixedly connected. At this time, the edge of the shell is the connection position of the two shells, that is, the edge of the openings of the two shells.

[0038] In one embodiment, the connecting portion is provided with a plurality of welding portions 7 arranged at intervals.

[0039] Preferably, the welding portion 7 plays a role of pre-fixation, preventing the shell from being misplaced during movement such as process transfer, resulting in poor alignment of the end faces of the connection portion, thereby preventing the subsequent sealing and fixing of the shell from being affected.

[0040] More preferably, a plurality of welding portions 7 are provided and arranged in sequence at intervals, which not only achieves the effect of pre-fixation but also reduces deformation of the connection portion caused by continuous welding.

[0041] In some embodiments, the housing includes a first shell 1 and a second shell 2 .

[0042] Preferably, the first housing 1 and the second housing 2 are fixedly connected to form a closed cavity inside the first housing 1 and the second housing 2 for accommodating the battery cell assembly.

[0043] More preferably, the combination of the first shell 1 and the second shell 2 may include but is not limited to the following three embodiments: a first embodiment, a first cavity 11 is provided in the first shell 1 and the second shell 2 is in a flat plate shape, so that the second shell 2 covers the opening of the first cavity 11 to be fixedly connected to the first shell 1, thereby achieving sealing of the first cavity 11; a second embodiment, a second cavity 21 is provided in the second shell 2 and the first shell 1 is in a flat plate shape, and the first shell 1 covers the opening of the second cavity 21 to be fixedly connected to the second shell 2, thereby achieving sealing of the second cavity 21; a third embodiment, a first cavity 11 is provided in the first shell 1 and a second cavity 21 is provided in the second shell 2, as shown in FIG. Figure 5 As shown, the opening of the first cavity 11 and the opening of the second cavity 21 are arranged opposite to each other, so that the first shell 1 and the second shell 2 are fixedly connected to each other, thereby achieving sealing of the opening of the first cavity 11 and the opening of the second cavity 21. In this embodiment, the first shell 1 and the second shell 2 are the third embodiment.

[0044] In one embodiment, the connecting portion includes a first extending portion 13 provided on the first housing 1 and a second extending portion 23 provided on the second housing 2 .

[0045] Preferably, the first extension portion 13 is arranged around the edge of the first shell 1 , specifically, the first extension portion 13 is arranged around the opening of the first cavity 11 , thereby surrounding the opening of the first cavity 11 so as to seal the opening of the first cavity 11 when fixedly connected to the second shell 2 .

[0046] More preferably, the first extension portion 13 and the first housing 1 can be integrally formed, or can be fixedly connected by welding or other methods. The user can select and set the method according to needs, and no specific limitation is made here.

[0047] More preferably, the second extension portion 23 is arranged around the edge of the second shell 2 , specifically, the second extension portion 23 is arranged around the opening of the second cavity 21 , thereby surrounding the opening of the second cavity 21 so as to seal the opening of the second cavity 21 when fixedly connected to the first shell 1 .

[0048] Further preferably, the second extension portion 23 and the second housing 2 can be integrally formed, or can be fixedly connected by welding or other methods. The user can select and set it according to needs, and no specific limitation is made here.

[0049] More preferably, the first extension portion 13 and the second extension portion 23 are abutted against each other, and the fixed connection between the first extension portion 13 and the second extension portion 23 is achieved to achieve a fixed connection between the first housing 1 and the second housing 2 .

[0050] In one embodiment, the welding portion 7 is provided on the first extension portion 13 and the second extension portion 23 , and the first extension portion 13 and the second extension portion 23 are connected via the welding portion 7 .

[0051] Preferably, a plurality of spaced-apart welding portions 7 are simultaneously provided on the first extension portion 13 and the second extension portion 23 so as to realize the connection and pre-fixation of the first extension portion 13 and the second extension portion 23, and prevent the first extension portion 13 and the second extension portion 23 from being misaligned during movement such as process transfer, thereby affecting the fixing and sealing effect of the first extension portion 13 and the second extension portion 23.

[0052] More preferably, the welding portion 7 can be a welding method such as penetration welding, for example, penetration welding on the first extension portion 13 to achieve a fixed connection with the second extension portion 23, or penetration welding on the second extension portion 23 to achieve a fixed connection with the first extension portion 13, etc. The user can choose the setting according to needs, and no specific limitation is made here.

[0053] In one embodiment, the housing further includes a partition 3 disposed between the first shell 1 and the second shell 2 , and the connecting portion further includes an edge 31 of the partition 3 .

[0054] Preferably, the partition 3 is arranged between the first shell 1 and the second shell 2, thereby dividing the space between the first shell 1 and the second shell 2 into two independent cavities. In this embodiment, the partition 3 separates the first cavity 11 and the second cavity 21 and makes them independent of each other, so that at least one battery cell can be placed inside each of them to improve the space utilization within the shell, and multiple battery cells can be connected in series to output high voltage to meet the high voltage requirements.

[0055] More preferably, the partition 3 can be made of aluminum, steel, aluminum-plastic film or other materials. In this embodiment, the partition 3 is an aluminum plate, so as to facilitate pre-fixation by welding with the first shell 1 and the second shell 2 .

[0056] More preferably, the shape of the partition 3 is adapted to the first shell 1 or the second shell 2. In this embodiment, since the first shell 1 and the second shell 2 are rectangular parallelepipeds, the partition 3 is also rectangular parallelepiped to improve space utilization.

[0057] Further preferably, the edge 31 of the partition 3 is between the first extension portion 13 and the second extension portion 23 , the first extension portion 13 abuts against one side of the edge 31 , and the second extension portion 23 abuts against the other side of the edge 31 , so that the three are fixed to each other.

[0058] More preferably, the edge 31 is an edge surrounding the partition 3 so as to fully fit with the first extension portion 13 and the second extension portion 23 to ensure the fixing and sealing effect.

[0059] In one embodiment, the welding portion 7 is provided on the first extension portion 13 , the edge 31 of the partition 3 , and the second extension portion 23 , and the first extension portion 13 , the edge 31 , and the second extension portion 23 are connected via the welding portion 7 .

[0060] Preferably, the welding portion 7 is provided on the first extension portion 13, the edge 31 and the second extension portion 23 to achieve connection and pre-fixation of the three, and prevent the three from being misaligned during movement such as process transfer to affect the subsequent fixing and sealing effect.

[0061] More preferably, the welding portion 7 can be formed by penetrating welding on the first extension portion 13, or by penetrating welding on the second extension portion 23, thereby achieving a fixed connection between the first extension portion 13, the edge 31 and the second extension portion 23. In other embodiments, the welding portion 7 can also adopt other welding fixed connection methods, etc. The user can choose the setting according to needs, and no specific limitation is made here.

[0062] In one embodiment, the length of the welding portion 7 is h, wherein 1 mm ≤ h ≤ 10 mm. Figure 4 shown.

[0063] Preferably, the length h of the welding portion 7 is any value between 1 mm and 10 mm, for example, it can be 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, etc. The user can choose the setting according to needs, and no specific limitation is made here.

[0064] More preferably, it is the limitation of the above-mentioned length h range that, on the one hand, prevents the length h from being too small to affect the effect of pre-fixation and easily break during movement such as process transfer; on the other hand, prevents the length h from being too large to cause continuous welding and thermal deformation of the connection part, thereby ensuring the stability of the structure and reducing costs.

[0065] In one embodiment, 3mm≤h≤5mm.

[0066] Preferably, the length h is limited to any value between 3 mm and 5 mm, so as to further optimize the structural stability and processing cost and facilitate practical production.

[0067] In one embodiment, the distance between two adjacent welding portions 7 is d1, wherein 10 mm ≤ d1 ≤ 100 mm. Figure 4 shown.

[0068] Preferably, the distance d1 between two adjacent welding portions 7 can be any value between 10 mm and 100 mm, for example, it can be 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 30 mm, 40 mm, 50 mm, 60 mm, 70 mm, 80 mm, 90 mm, 100 mm, etc. The user can choose the setting as needed, and no specific limitation is made here.

[0069] More preferably, by limiting the distance d1 to the above range, on the one hand, it can prevent d1 from being too large, resulting in a loose pre-fixation, and on the other hand, it can prevent d1 from being too small, resulting in the connection part being deformed by heat, etc. Therefore, limiting d1 to between 10mm and 100mm not only ensures the stability of the pre-fixation, but also prevents the connection part from being deformed.

[0070] In one embodiment, the distance between the welding portion 7 and the outer end surface of the connecting portion is d2, wherein 0mm≤d2≤1.5mm. Figure 4 shown.

[0071] Preferably, the distance d2 between the welding portion 7 and the outer end surface of the connecting portion is any value between 0 mm and 1.5 mm, for example, it can be 0 mm, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, etc. The user can choose the setting as needed, and no specific limitation is made here.

[0072] More preferably, by limiting d2 to the above range, it is possible to prevent d2 from being too large, which may cause the welding head to interfere with the first shell 1 or the second shell 2 during welding, thereby affecting the smooth progress of welding.

[0073] In one embodiment, the welding portion 7 is provided on an end surface of the connecting portion in the first direction X.

[0074] Preferably, the welding portion 7 is through-welding on the end face of the first direction X of the connecting portion, so that the first extension portion 13 and the second extension portion 23 can be fixedly connected, or the first extension portion 13, the edge 31 and the second extension portion 23 can be fixedly connected, thereby realizing the pre-fixation of the first shell 1, the partition 3 and the second shell 2, and preventing them from being dislocated and poorly aligned during movement such as process transfer, thereby affecting their later fixation and sealing effects.

[0075] More preferably, if Figure 6As shown, the welding portion 7 is the melted portion of the first extension portion 13, the edge 31 and the second extension portion 23 during welding of the connecting portion, thereby achieving a stable pre-fixation of the three and preventing the three from being dislocated during movement.

[0076] In one embodiment, the battery cell assembly includes a first battery cell 4 arranged between the first shell 1 and the partition 3 and a second battery cell 5 arranged between the second shell 2 and the partition 3. The partition 3 is provided with a conductive column 6, and the two ends of the conductive column 6 are respectively connected to the first battery cell 4 and the second battery cell 5.

[0077] Preferably, the first battery cell 4 and the second battery cell 5 are respectively located in the first cavity 11 and the second cavity 21 and on both sides of the partition 3 , thereby isolating the first battery cell 4 and the second battery cell 5 from each other.

[0078] More preferably, the conductive column 6 passes through the upper and lower surfaces of the partition 3 and is insulated and sealed therewith. Specifically, a sealing ring and an insulating member 61 are provided between the conductive column 6 and the partition 3 to achieve insulation and sealing between the two.

[0079] More preferably, one end of the conductive column 6 is in the first cavity 11, and the other end is in the second cavity 21, one end of the conductive column 6 is fixedly connected to a pole ear of the first battery cell 4, such as by welding, and the other end of the conductive column 6 is fixedly connected to a pole ear of the second battery cell 5, such as by welding, so that the first battery cell 4 and the second battery cell 5 are electrically connected through the conductive column 6, such as in series, thereby improving the overall space utilization and energy density of the battery.

[0080] In one embodiment, if Figure 1 and Figure 2 As shown, the first housing 1 is provided with a first pole 12 , and the first pole 12 is connected to another pole ear of the first battery cell 4 .

[0081] Preferably, the first pole 12 passes through the inner and outer surfaces of the first housing 1 and is insulated and sealed to the first housing 1 , thereby achieving insulation and sealing between the first pole 12 and the first housing 1 , which belongs to the prior art and will not be described in detail here.

[0082] More preferably, one end of the first pole 12 is in the first cavity 11 and connected to the other pole ear of the first battery cell 4 to achieve the output of electric energy. Furthermore, one pole ear of the first battery cell 4 is a positive pole ear, and the other pole ear is a negative pole ear.

[0083] More preferably, the first pole 12 and the tab may be fixedly connected by ultrasonic welding or the like, which belongs to the prior art and will not be described in detail here.

[0084] In one embodiment, the second housing 2 is provided with a second pole 22, and the second pole 22 is connected to another pole ear of the second battery cell 5, such as Figure 1 and Figure 2 shown.

[0085] Preferably, the second pole 22 passes through the inner and outer surfaces of the second housing 2 and is insulated and sealed therewith, thereby achieving insulation and sealing between the second pole 22 and the second housing 2, which belongs to the prior art and will not be described in detail here.

[0086] More preferably, one end of the second pole 22 is located in the second cavity 21 and connected to the other pole ear of the second battery cell 5 to achieve the output of electrical energy. Furthermore, one pole ear of the second battery cell 5 is a negative pole ear, and the other pole ear is a positive pole ear.

[0087] More preferably, the second pole 22 and the tab may be fixedly connected by ultrasonic welding or the like, which belongs to the existing technology and will not be described in detail here.

[0088] In one embodiment, the present invention further provides a battery pack, which includes the above-mentioned battery 100.

[0089] Those skilled in the art will appreciate that although some embodiments described herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are intended to be within the scope of this application and to form different embodiments. For example, in the claims of this application, any of the claimed embodiments may be used in any combination.

[0090] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A battery, characterized in that: The invention comprises a shell component and a battery core component arranged in the shell component. The shell component comprises a shell and a connecting portion surrounding the edge of the shell. The connecting portion is provided with a plurality of welding portions arranged at intervals.

2. The battery according to claim 1, characterized in that The housing includes a first shell and a second shell, the connecting portion includes a first extending portion provided on the first shell and a second extending portion provided on the second shell, and the first extending portion and the second extending portion are connected via the welding portion.

3. The battery according to claim 2, characterized in that The shell further includes a partition disposed between the first shell and the second shell, the connecting portion further includes an edge of the partition, and the first extension portion, the edge of the partition, and the second extension portion are connected via the welding portion.

4. The battery according to claim 1, characterized in that The length of the welding portion is h, wherein 1 mm ≤ h ≤ 10 mm.

5. The battery according to claim 4, characterized in that in, 3mm≤h≤5mm.

6. The battery according to claim 1, characterized in that The distance between two adjacent welding portions is d1, wherein 10 mm ≤ d1 ≤ 100 mm.

7. The battery according to claim 1, characterized in that The distance between the welding portion and the outer end surface of the connecting portion is d2, wherein 0mm≤d2≤1.5mm.

8. The battery according to claim 1, characterized in that The welding portion is provided on an end surface of the connecting portion in the first direction.

9. The battery according to claim 3, characterized in that The battery cell assembly includes a first battery cell arranged between the first shell and the partition and a second battery cell arranged between the second shell and the partition. The partition is provided with a conductive column, and both ends of the conductive column are respectively connected to the first battery cell and the second battery cell.

10. A battery pack, characterized in that: A battery comprising the battery according to any one of claims 1 to 9.

Images