Battery and electric equipment

Abstract

The invention discloses a battery and electric equipment, and the battery comprises a shell which is provided with at least one separation part so as to divide the internal space of the shell into at least two cavities which are arranged side by side along a first direction, the separation part protrudes out of the first side of the shell towards the interior of the shell, and a gap is formed between the separation part and the inner wall of the second side of the shell, so that any two adjacent cavities are communicated; the first side and the second side are two opposite sides of the shell along the second direction; the two ends, in the third direction, of the shell are the first end and the second end correspondingly. The first direction, the second direction and the third direction are vertical in pairs; the electrode assemblies comprise positive plates and negative plates which are arranged in a laminated manner, the number of the electrode assemblies is equal to that of the cavities, and one electrode assembly is arranged in each cavity; and the protection plate is arranged on at least one of the first end and the second end and is used for being connected with the tab of each electrode assembly. The separation part physically separates the two adjacent electrode assemblies and limits the positions of the two adjacent electrode assemblies, so that an integrated multi-electrode assembly structure is formed, and the energy density of the battery is improved.

Description

Technical Field

[0001] This invention relates to the field of battery structure technology, and more specifically, to a battery. Furthermore, this invention also relates to an electrical device comprising the aforementioned battery. Background Technology

[0002] As consumer electronic devices (such as smartphones, tablets, and wearable devices) become increasingly powerful and diverse, they place higher demands on the power supply performance of batteries. In order to meet the power supply needs of increasingly functional consumer electronic devices, related technologies use two independent cells connected in parallel or series to form a battery pack for power supply. The two independent cells are packaged separately, and independent external structural components are used to fix and insulate the two cells and their corresponding protection boards.

[0003] Battery packs with this structure have a large overall size due to the presence of multiple layers of encapsulation shells (such as punched sidewalls and side seals) between adjacent cells, and the assembly gaps between these multiple layers of encapsulation shells. This results in a reduction in the overall energy density of the battery pack.

[0004] In conclusion, how to improve the overall energy density of battery packs is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the object of the present invention is to provide a battery that improves the overall energy density of the battery.

[0006] Another object of the present invention is to provide an electrical device including the above-described battery in order to improve the overall energy density of the battery.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A battery comprising:

[0009] A housing has at least one partition inside to divide the internal space of the housing into at least two cavities arranged side by side along a first direction. The partition protrudes into the housing from a first side of the housing and has a gap between it and the inner wall of the housing's second side, allowing communication between any two adjacent cavities. The first side and the second side are two opposite sides of the housing along a second direction. The two ends of the housing along a third direction are a first end and a second end, respectively. The first direction, the second direction, and the third direction are perpendicular to each other.

[0010] An electrode assembly includes a positive electrode and a negative electrode stacked together. The number of electrode assemblies is equal to the number of cavities. Each cavity contains one electrode assembly, and each electrode assembly includes a tab.

[0011] A protective plate, disposed at at least one of the first end and the second end, is used for electrical connection with the tabs of each of the electrode assemblies.

[0012] Optionally, the housing is an integrally formed membrane housing. After the membrane housing encapsulates all the electrode components, it forms a battery cell. The membrane housing protrudes towards the inside of the housing at the position between two adjacent electrode components to form the partition portion. The outer wall of the partition portion forms a groove. The width dimension of the groove along the first direction is A, and the maximum depth dimension of the groove along the second direction is B. The range of A and B is 0.5mm to 3mm.

[0013] Optionally, any two adjacent electrode assemblies have different thicknesses along the second direction, and the side of the membrane shell away from the partition is recessed to form a first wall and a second wall with a height difference along the second direction, as well as a stepped surface connecting the first wall and the second wall. One of the first wall and the second wall corresponds to one of the two adjacent electrode assemblies, and the other of the first wall and the second wall corresponds to the other of the two adjacent electrode assemblies. The stepped surface is disposed opposite to the partition.

[0014] Optionally, the distance between the first wall and the second wall along the second direction is C, and the value of C ranges from 0.3 mm to 2 mm.

[0015] Optionally, the tabs of all the electrode assemblies are located at the end of the electrode assembly facing the first end, and the protective plate is located at the first end.

[0016] Optionally, the number of electrode assemblies is two, namely a first electrode assembly and a second electrode assembly. The battery cell includes a first sub-section and a second sub-section. The first sub-section includes the first electrode assembly and a first membrane housing portion that encapsulates the first electrode assembly. The second sub-section includes the second electrode assembly and a second membrane housing portion that encapsulates the second electrode assembly. The end of the first sub-section facing the first end protrudes in a third direction from the end of the second sub-section facing the first end.

[0017] The protective plate includes a base portion and a flexible electrical adapter portion connected to the base portion. The base portion is located at the end of the second sub-part facing the first end and is connected to the tab of the second electrode assembly. The flexible electrical adapter portion is connected to the tab of the first electrode assembly.

[0018] Optionally, the first end is provided with:

[0019] The first top edge is bent toward the end face of the first sub-part;

[0020] The second top sealing edge extends along the third direction toward the end face away from the second sub-part;

[0021] The housing is provided with a first side sealing edge along one side of the first direction. The first side sealing edge is connected to the second top sealing edge. The first side sealing edge, the second top sealing edge, the portion of the first sub-part protruding from the second sub-part along the third direction, and the end face of the second sub-part facing the first end form a top sealing groove. The base part is disposed in the top sealing groove.

[0022] Optionally, the first sub-part protrudes beyond the second sub-part towards the first end along the third direction by a length D, where D ranges from 1mm to 4mm; the base portion has a dimension E along the third direction, where D < E < D + 2mm; and / or,

[0023] The distance between the end of the second top sealing edge away from the second sub-part and the end of the first sub-part facing the first end is F, where F < 1 mm.

[0024] Optionally, a first insulating adhesive is provided between the protective plate and the first top sealing edge; a second insulating adhesive is provided between the protective plate and the second top sealing edge; and / or,

[0025] The first end and the outer surface of the protective plate are covered with a third insulating adhesive; and / or,

[0026] The housing has a second side sealing edge on one side along the first direction. The second side sealing edge is connected to the first top sealing edge and the two form a corner protrusion. The corner protrusion is pressed onto the first top sealing edge. The housing is connected to an adhesive fastener, which covers the corner protrusion.

[0027] An electrical device comprising any of the aforementioned batteries.

[0028] The battery provided by this invention has at least the following beneficial effects:

[0029] The internal structure of the casing is divided into at least two interconnected cavities by a partition, achieving a multi-cavity integrated structure. An electrode assembly is housed within each cavity, thus creating a multi-electrode assembly structure. It is understood that the partition physically separates adjacent electrode assemblies and limits their positions along a first direction, effectively preventing cross-contamination between multiple electrode assemblies (in this embodiment, "multiple" refers to at least two). Furthermore, it is understood that using a partition to separate multiple electrode assemblies, compared to combining two independently packaged cells to form a multi-cell structure in related technologies, reduces redundant gaps between individual cells, avoids excessive occupation of internal casing space, optimizes spatial layout, and thus improves the effective energy density of the battery within the same volume.

[0030] In addition, combining two independently packaged cells in related technologies to form a multi-cell structure and improving it into an integrated one-cell multi-electrode component structure allows for one-time packaging of the multi-electrode component. That is, a battery with multi-electrode component function can be produced in a single process, which helps to simplify the process steps, greatly simplifies the subsequent assembly process, improves production efficiency, and reduces manufacturing costs.

[0031] The electrical device provided by the present invention includes the battery described above and has at least the beneficial effects of the battery described above. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0033] Figure 1 An exploded view of a battery provided in a specific embodiment of the present invention;

[0034] Figure 2 for Figure 1 The image shows the front view of the assembled battery.

[0035] Figure 3 for Figure 1 The top view of the assembled battery shown.

[0036] Figure 4 for Figure 1 The left view of the assembled battery shown.

[0037] Figure 5 This is a schematic diagram of the partition structure;

[0038] Figure 6This is a schematic diagram of the stepped surface.

[0039] Figure 7 A schematic diagram showing the dimensions of the groove in the partition and the height difference between the first and second walls;

[0040] Figure 8 A schematic diagram showing the height at which the first sub-part protrudes beyond the second sub-part;

[0041] Figure 9 for Figure 8 A magnified view of a portion of G;

[0042] Figure 10 A schematic diagram of the structure in which the first top sealing edge bends toward the end face of the first sub-part and the second top sealing edge extends along a third direction toward the end face away from the second sub-part;

[0043] Figure 11 This is a schematic diagram of the first top edge bend and the corner protrusion bend;

[0044] Figure 12 A schematic diagram of the structure after the corner protrusion of the adhesive fastener is fixed to the housing;

[0045] Figure 13 A structural schematic diagram of the protection plate from a first-person perspective;

[0046] Figure 14 A structural schematic diagram of the protection plate from a second perspective;

[0047] Figure 15 A schematic diagram showing the dimensions of the base portion of the protective plate along the second direction;

[0048] Figure 16 This is a schematic diagram showing the placement of the first and second insulating adhesive components.

[0049] Figure 17 This is a structural diagram of the protective plate and the housing before assembly;

[0050] Figure 18 This is a schematic diagram of the structure after the protective plate and the shell are assembled;

[0051] Figure 19 This is a schematic diagram of the structure after the third insulating adhesive component is installed.

[0052] Figure label:

[0053] 1-Housing; 11-Separation section; 12-First wall surface; 13-Second wall surface; 14-Stepped surface; 15-First top sealing edge; 16-Second top sealing edge; 17-First side sealing edge; 18-Second side sealing edge; 19-Corner protrusion; 21-First sub-section; 22-Second sub-section; 3-Protective plate; 31-Base section; 311-Second nickel sheet; 32-Flexible electrical adapter section; 321-First nickel sheet; 33-Flexible interconnect device; 4-First insulating adhesive; 5-Second insulating adhesive; 6-Third insulating adhesive; 7-Adhesive fastener. Detailed Implementation

[0054] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0055] The core of this invention is to provide a battery that improves the overall energy density of the battery. Another core aspect of this invention is to provide an electrical device comprising the aforementioned battery, thereby improving the overall energy density of the battery.

[0056] It should be noted that in this embodiment of the invention, the first direction refers to the width direction of the battery, the second direction refers to the thickness direction of the battery, and the third direction refers to the length direction of the battery. That is, the first direction, the second direction, and the third direction refer to three mutually perpendicular directions of the battery in three-dimensional space. For ease of understanding, as follows... Figure 2 , Figure 3 and Figure 4 In the diagram, the first direction refers to the X-axis direction, the second direction refers to the Y-axis direction, and the third direction refers to the Z-axis direction.

[0057] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4This invention provides a battery, including a housing 1, an electrode assembly, and a protective plate 3. The housing 1 has at least one partition 11 inside, dividing the internal space of the housing 1 into at least two cavities arranged side-by-side along a first direction. The partition 11 protrudes from a first side of the housing 1 towards the interior of the housing 1 and has a gap with the inner wall of the second side of the housing 1, allowing communication between any two adjacent cavities. The first side and the second side are opposite sides of the housing 1 along a second direction. The two ends of the housing 1 along a third direction are a first end and a second end, respectively. The electrode assembly includes stacked positive and negative electrode plates, the number of electrode assemblies being equal to the number of cavities. Each cavity contains one electrode assembly, and each electrode assembly includes a tab. The protective plate 3 is disposed at at least one of the first end and the second end, for electrical connection with the tabs of each electrode assembly.

[0058] In other words, this embodiment uses the partition 11 to divide the interior of the housing 1 into at least two interconnected cavities, realizing an integrated multi-cavity structure. An electrode assembly is disposed in each cavity, thereby achieving an integrated multi-electrode assembly structure. It is understood that the partition 11 physically separates adjacent electrode assemblies and limits their positions along the first direction, effectively preventing multiple electrode assemblies (in this embodiment, "multiple" refers to at least two) from interfering with each other. Furthermore, it is understood that using the partition 11 to separate multiple electrode assemblies, compared to combining two independent cells that are separately packaged to form a multi-cell structure in related technologies, reduces redundant gaps between independent cells, avoids excessive occupation of the internal space of the housing 1, optimizes the spatial layout, and thus improves the effective energy density of the battery within the same volume.

[0059] In addition, combining two independently packaged cells in related technologies to form a multi-cell structure and improving it into an integrated one-cell multi-electrode component structure allows for one-time packaging of the multi-electrode component. That is, a battery with multi-electrode component function can be produced in a single process, which helps to simplify the process steps, greatly simplifies the subsequent assembly process, improves production efficiency, and reduces manufacturing costs.

[0060] In addition, it is understood that there is a gap between the partition 11 and the inner wall of the second side of the housing 1, so that any two adjacent cavities can be connected, that is, the electrolyte in each cavity can circulate with each other. This scheme can improve the uniformity and lifespan of each electrode assembly.

[0061] It should be noted that this embodiment does not limit the specific arrangement of the partition 11, as long as the partition 11 can be formed in the housing 1 to divide the internal space of the housing 1 into at least two cavities arranged side by side along the first direction.

[0062] like Figure 5and Figure 7 As shown, in some embodiments, the housing 1 is an integrally formed membrane housing. After the membrane housing encapsulates all electrode components, it forms a battery cell. The membrane housing protrudes towards the inside of the housing 1 at the position between two adjacent electrode components to form a partition 11, and a groove is formed on the outer wall of the housing 1 corresponding to the partition 11. The width dimension of the groove along the first direction is A, and the maximum depth dimension of the groove along the second direction is B. The range of A and B is 0.5mm~3mm.

[0063] It should be noted that this embodiment does not limit the specific material of the membrane shell. For example, the membrane shell can be an aluminum-plastic film.

[0064] In other words, in this embodiment, the partition 11 is formed by the protrusion of the membrane shell towards the inside of the housing 1 at the position between two adjacent electrode components. For example, at least one indentation is formed by stamping at a preset position on the integral membrane shell using a mold to form the partition 11. That is, in this embodiment, the partition 11 can be an indentation on the membrane shell. In this embodiment, the indentation is used to divide the inside of the housing 1 into multiple interconnected pits and grooves. After the membrane shell encapsulates all electrode components, multiple interconnected cavities are formed, and the indentation is used to limit and fix the electrode components to prevent multiple electrode components from moving in series.

[0065] It is understandable that when the membrane shell protrudes towards the interior of the housing 1 to form a partition 11 corresponding to the position between two adjacent electrode assemblies, a groove is simultaneously formed on the outer wall of the housing 1 corresponding to the partition 11. The size of the groove determines the size of the partition 11. In this embodiment, the width dimension A of the groove along the first direction ranges from 0.5mm to 3mm, for example, A can be 0.8mm, 1mm, 1.5mm, 2mm, or 2.5mm, etc.; the maximum depth dimension B of the groove along the second direction ranges from 0.5mm to 3mm, for example, B can be 0.8mm, 1mm, 1.5mm, 2mm, or 2.5mm, etc. If the values ​​of A and B are too small, that is, the size of the partition 11 is small, the electrode assemblies on both sides of the partition 11 are not securely fixed, which can easily lead to relative contact between the electrode assemblies on both sides of the partition 11; if the values ​​of A and B are too large, the internal space of the housing 1 is wasted, resulting in a loss of battery energy density.

[0066] In addition, such as Figure 6As shown, in order to better limit the position of two adjacent electrode assemblies, in some embodiments, the thickness of any two adjacent electrode assemblies is different along the second direction, and the side of the membrane shell away from the partition 11 is recessed to form a first wall surface 12 and a second wall surface 13 with a height difference along the second direction, as well as a stepped surface 14 connecting the first wall surface 12 and the second wall surface 13. One of the first wall surface 12 and the second wall surface 13 corresponds to one of the two adjacent electrode assemblies, and the other of the first wall surface 12 and the second wall surface 13 corresponds to the other of the two adjacent electrode assemblies. The stepped surface 14 is disposed opposite to the partition 11.

[0067] In other words, the battery in this embodiment has an asymmetrical thickness structure, with different thicknesses for any two adjacent electrode components. This embodiment addresses this by creating a recess on the side of the housing away from the separator 11, forming a first wall 12 and a second wall 13 with a height difference along the second direction. This encapsulates electrode components of different thicknesses. Simultaneously, a stepped surface 14 is formed between the first wall 12 and the second wall 13, causing them to be misaligned in the second direction. The stepped surface 14 corresponds to the separator 11, and it limits the electrode components on both sides. The separator 11 and its aligned stepped surface 14 work together to effectively fix the electrode components, preventing multiple electrode components from moving around. Furthermore, the height difference along the thickness direction of the housing 1 on the second side of the housing 1 allows for more space for other structures within the device, accommodating irregular internal structures and improving the spatial adaptability and integration of the battery and the device.

[0068] It should be noted that the first wall surface 12 and the second wall surface 13 are relative concepts. For example, when the number of electrode assemblies is three, the portion of the second side of the housing 1 corresponding to the middle electrode assembly and the electrode assembly on one side can form the first wall surface 12 and the second wall surface 13; similarly, the portion of the second side of the housing 1 corresponding to the middle electrode assembly and the electrode assembly on the other side can also form the first wall surface 12 and the second wall surface 13. That is, the first wall surface 12, the second wall surface 13, and the stepped surface 14 form a wall unit. The second side of the housing 1 can be recessed to form at least one such wall unit. For example, when the number of electrode assemblies is two, the second side of the housing 1 has one wall unit, and when the number of electrode assemblies is three, the second side of the housing 1 has two wall units.

[0069] Furthermore, such as Figure 6 and Figure 7 As shown, in some embodiments, the distance between the first wall surface 12 and the second wall surface 13 along the second direction is C, and the value of C ranges from 0.3mm to 2mm. For example, the value of C can be 0.4mm, 0.7mm, 1mm, 1.2mm, 1.5mm, or 1.8mm, etc.

[0070] Understandably, if the value of C is too small, it will not serve as a limit switch, and if the value of C is too large, it will result in low energy density of the battery.

[0071] In addition, in order to facilitate the connection between the protective plate 3 and the tabs of each electrode assembly, in some embodiments, the tabs of all electrode assemblies are located at the end of the electrode assembly facing the first end, and the protective plate 3 is located at the first end.

[0072] In other words, in this embodiment, the tabs of each electrode assembly are located at the end facing the first end of the housing 1. Thus, placing the protective plate 3 at the first end facilitates the connection between the protective plate 3 and the tabs of all electrode assemblies, which helps to save space.

[0073] Additionally, it should be noted that the above embodiments do not limit the specific number of electrode assemblies. The number of electrode assemblies is the same as the number of cavities inside the housing 1. The number of electrode assemblies can be two, three, or other numbers.

[0074] Please combine Figure 1 , Figure 8 and Figure 13 As shown, in some embodiments, there are two electrode assemblies, namely a first electrode assembly and a second electrode assembly, and the length of the first electrode assembly along a third direction is greater than the length of the second electrode assembly along a third direction; the battery cell includes a first sub-part 21 and a second sub-part 22, the first sub-part 21 includes a first electrode assembly and a first membrane shell portion encapsulating the first electrode assembly, and the second sub-part 22 includes a second electrode assembly and a second membrane shell portion encapsulating the second electrode assembly; one end of the first sub-part 21 facing the first end of the housing 1 protrudes along a third direction from one end of the second sub-part 22 facing the first end of the housing 1; the protective plate 3 includes a base part 31 and a flexible electrical adapter part 32 connected to the base part 31, the base part 31 is disposed at the end of the second sub-part 22 facing the first end of the housing 1 and is connected to the tab of the second electrode assembly, and the flexible electrical adapter part 32 is connected to the tab of the first electrode assembly.

[0075] In other words, the lengths of the two electrode components in this embodiment are not equal, and the battery has an asymmetrical length design. Since there is a height difference between the first electrode component and the second electrode component along the third direction, the membrane shell encapsulates the first electrode component and the second electrode component to form two sub-parts with different heights along the third direction, which are designated as the first sub-part 21 and the second sub-part 22. The end of the first sub-part 21 facing the first end of the housing 1 protrudes along the third direction from the end of the second sub-part 22 facing the first end of the housing 1, forming a space for accommodating the base part 31 of the protective plate 3. This facilitates the installation of a larger size protective plate 3 rigid plate. Moreover, the height of the first sub-part 21 protruding from the second sub-part 22 provides more space for the electrode components, which is beneficial to improving the energy density of the battery.

[0076] It should be noted that this embodiment does not limit the specific length of the first sub-part 21 protruding from the second sub-part 22, such as... Figure 8 As shown, in some embodiments, the end of the first sub-part 21 facing the first end protrudes in a third direction from the end of the second sub-part facing the first end by a length D, where the value of D ranges from 1mm to 4mm. For example, the value of D is 1.5mm, 2mm, 2.5mm, 3mm, or 3.5mm, etc.

[0077] In other words, along the third direction, the height of the first sub-part 21 protruding from the second sub-part 22 ranges from 1mm to 4mm. It can be understood that the larger the value of D, the larger the space for the base part 31 to accommodate the protective plate 3, and therefore, a wider protective plate 3 can be placed; if the value of D is too small, the purpose of setting the protective plate 3 in the space formed by the height difference between the first sub-part 21 and the second sub-part 22 along the third direction will not be achieved.

[0078] Furthermore, this embodiment does not limit the specific dimensions of the base portion 31 of the protective plate 3 along the third direction.

[0079] In some embodiments, the dimension of the base portion 31 of the protective plate 3 along a third direction is E (e.g., Figure 15 As shown in the figure, D < E < D + 2 mm. This dimensional relationship helps ensure the compatible installation of the protective plate 3.

[0080] Furthermore, such as Figure 10 and Figure 11 As shown, in some embodiments, the first end of the housing 1 is provided with a first top sealing edge 15 and a second top sealing edge 16. The first top sealing edge 15 is bent toward the end face of the first sub-part 21. The second top sealing edge 16 extends along a third direction toward the end face away from the second sub-part 22. The housing 1 is provided with a first side sealing edge 17 along a first direction. The first side sealing edge 17 is connected to the second top sealing edge 16. The first side sealing edge 17, the second top sealing edge 16, the portion of the first sub-part 21 protruding from the second sub-part 22 along a third direction, and the end face of the second sub-part 22 toward the first end form a top sealing groove. The base part 31 is disposed in the top sealing groove.

[0081] In other words, in this embodiment, the first top sealing edge 15 of the housing 1 corresponding to the first sub-part 21 is bent toward the end of the first sub-part 21 to form a structure parallel to the end face of the first sub-part 21 toward the first end, while the second top sealing edge 16 of the housing 1 corresponding to the second sub-part 22 extends in a third direction. This makes the first end of the housing 1 flatter overall, so as to form a compact battery head plane.

[0082] To ensure that the first end of the housing 1 is relatively flat, such as Figure 9As shown, in some embodiments, the distance between the end of the second top sealing edge 16 away from the second sub-part 22 and the end of the first sub-part 21 facing the first end is F, where F < 1 mm.

[0083] It is understandable that by making the value of F less than 1 mm, on the one hand, it is beneficial to make the position of the first sub-part 21 of the housing 1 and the position of the second sub-part 22 of the housing 1 relatively flush along the third direction. On the other hand, it ensures that the first top sealing edge 15 can be bent smoothly. It is understandable that when the value of E is too large, the first top sealing edge 15 may not be able to be bent due to the restriction of the second top sealing edge 16.

[0084] In addition, such as Figure 11 and Figure 12 As shown, in some embodiments, the housing 1 has a second side sealing edge 18 on one side along the first direction. The second side sealing edge 18 is connected to the first top sealing edge 15 and the two form a corner protrusion 19. The corner protrusion 19 is pressed onto the second top sealing edge 16. The housing 1 is connected to an adhesive fastener 7, which covers the corner protrusion 19.

[0085] It is understandable that during the process of forming the finished battery, the first top sealing edge 15 needs to be bent toward the end of the first sub-part 21 to form a structure parallel to the end face of the first sub-part 21 toward the first end. At this time, the first top sealing edge 15 and the second side sealing edge 18 form a corner protrusion 19. Then, the corner protrusion 19 is bent toward the bent first top sealing edge 15 so that the corner protrusion 19 is pressed toward the first top sealing edge 15 to form a relatively flat first end. In order to prevent the corner protrusion 19 from rebounding, this embodiment uses an adhesive fastener 7 to cover the corner protrusion 19 and connects the adhesive fastener 7 to the housing 1 to fix the corner protrusion 19 and the housing 1, so that the part of the first end of the housing 1 corresponding to the first sub-part 21 is roughly flush with the side of the second top sealing edge 16 away from the second sub-part 22.

[0086] It should be noted that the specific material and shape of the bonding fastener 7 are not limited in this embodiment, as long as it can serve to fix the corner protrusion 19 to the shell 1. For example, the bonding fastener 7 is adhesive tape.

[0087] Additionally, it should be noted that in this embodiment of the invention, the base portion 31 of the protection board 3 refers to a rigid printed circuit board integrating components such as charge / discharge management and protection integrated circuits. The flexible electrical adapter portion 32 is flexible and is a flexible board. For example, the flexible electrical adapter portion 32 is a flexible circuit board, which facilitates connection to the tabs of the first electrode assembly through bending, etc. For example, the flexible electrical adapter portion 32 is bent to make it flat against the first top sealing edge 15, which is parallel to the end face of the first sub-part 21 after bending. Figure 13 and Figure 14As shown, in some embodiments, the flexible electrical adapter 32 is provided with two first nickel plates 321 for connecting to the two tabs of the first electrode assembly; the base portion 31 is provided with two second nickel plates 311 for connecting to the two tabs of the second electrode assembly. For example, the two first nickel plates 321 are welded to the two tabs of the first electrode assembly, and the two second nickel plates 311 are welded to the two tabs of the second electrode assembly. Furthermore, to facilitate the connection of the battery to the electronic components of the device, in some embodiments, a flexible interconnect device 33 is connected to the end of the base portion 31 away from the flexible electrical adapter 32. The flexible interconnect device 33 is bent parallel to the base portion 31 and is partially located within the top sealing groove, with a portion extending out of the top sealing groove in a third direction, to facilitate the connection of the electronic components of the device.

[0088] Additionally, it should be noted that the surface of the base portion 31 can be perpendicular to the surface of the flexible electrical adapter portion 32, that is, the base portion 31 is vertically disposed within the top sealing groove.

[0089] In addition, such as Figure 16 , Figure 17 and Figure 18 As shown, in order to ensure isolation between the protective plate 3 and the electrode assembly, in some embodiments, a first insulating adhesive 4 is provided between the protective plate 3 and the first top sealing edge 15; and a second insulating adhesive 5 is provided between the protective plate 3 and the second top sealing edge 16.

[0090] In other words, this embodiment uses a first insulating adhesive 4 to isolate the protective plate 3 from the first top sealing edge 15, and a second insulating adhesive 5 to isolate the protective plate 3 from the second top sealing edge 16, ensuring long-term insulation reliability and connection stability between the protective plate 3 and the electrode assembly, and reducing the risk of short circuits. It can be understood that the first insulating adhesive 4 avoids the tabs of the first electrode assembly, and the second insulating adhesive 5 avoids the tabs of the second electrode assembly, to ensure that the first nickel sheet 321 is connected to the tabs of the first electrode assembly, and the second nickel sheet 311 is connected to the tabs of the second electrode assembly. During battery assembly, the first insulating adhesive 4 is first adhered to the first top sealing edge 15, and the second insulating adhesive 5 is adhered to the second top sealing edge 16. Then, the protective plate 3 is installed, such that the first insulating adhesive 4 is located between the protective plate 3 and the first top sealing edge 15, and the second insulating adhesive 5 is located between the protective plate 3 and the second top sealing edge 16.

[0091] It should be noted that this embodiment does not limit the specific materials of the first insulating adhesive 4 and the second insulating adhesive 5, as long as they can perform the functions of isolation and insulation. For example, the first insulating adhesive 4 and the second insulating adhesive 5 are aramid adhesive paper.

[0092] In addition, such as Figure 19 As shown, in some embodiments, the first end of the housing 1 and the exterior of the protective plate 3 are covered with a third insulating adhesive 6.

[0093] It is understandable that the third insulating adhesive 6 covers the base portion 31, the flexible electrical junction portion 32, and the sealing area of ​​the protective plate 3. In other words, in this embodiment, the third insulating adhesive 6 is used to cover the first end of the housing 1 and the outside of the protective plate 3 to fix the protective plate 3 to the housing 1, prevent the protective plate 3 from moving or popping up, and insulate the first end of the housing 1 from the outside. At the same time, it is beneficial to the aesthetics of the first end of the housing 1.

[0094] It should be noted that this embodiment does not limit the specific material or shape of the third insulating adhesive 6, as long as it can cover the first end of the shell 1 and the protective plate 3, and play the role of fixing the protective plate 3, the shell 1 and external insulation. For example, the third insulating adhesive 6 is insulating tape.

[0095] In addition to the battery described above, the present invention also provides an electrical device that includes the battery disclosed in the above embodiments. For the structure of other parts of the electrical device, please refer to the relevant technology, which will not be repeated here.

[0096] It should be noted that the focus of this embodiment is that the electrical equipment using the battery disclosed in any of the above embodiments has at least the beneficial effects of the battery, which will not be elaborated here.

[0097] In addition, the electrical equipment in this embodiment can be, but is not limited to, mobile phones, tablets, laptops, wearable devices, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc.

[0098] It should also be noted that, in this specification, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0099] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0100] The battery and electrical device provided by this invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of this invention.

Claims

1. A battery, characterized in that, include: The housing (1) has at least one partition (11) inside to divide the internal space of the housing (1) into at least two cavities arranged side by side along a first direction. The partition (11) protrudes from the inside of the housing (1) on a first side and has a gap between it and the inner wall of the second side of the housing (1) to allow communication between any two adjacent cavities. The first side and the second side are two opposite sides of the housing (1) along a second direction. The two ends of the housing (1) along a third direction are a first end and a second end, respectively. The first direction, the second direction, and the third direction are perpendicular to each other. An electrode assembly includes a positive electrode and a negative electrode stacked together. The number of electrode assemblies is equal to the number of cavities. Each cavity contains one electrode assembly, and each electrode assembly includes a tab. A protective plate (3) is disposed at at least one of the first end and the second end for electrical connection with the tabs of each of the electrode assemblies.

2. The battery according to claim 1, characterized in that, The housing (1) is an integrally formed membrane housing. After the membrane housing encapsulates all the electrode components, it forms a battery cell. The membrane housing protrudes towards the inside of the housing (1) at the position between two adjacent electrode components to form the partition (11). The outer wall of the partition (11) forms a groove. The width dimension of the groove along the first direction is A, and the maximum depth dimension of the groove along the second direction is B. The range of A and B is 0.5mm~3mm.

3. The battery according to claim 2, characterized in that, The thickness of any two adjacent electrode assemblies is different along the second direction. The side of the membrane shell away from the partition (11) is recessed to form a first wall surface (12) and a second wall surface (13) with a height difference along the second direction, as well as a stepped surface (14) connecting the first wall surface (12) and the second wall surface (13). One of the first wall surface (12) and the second wall surface (13) corresponds to one of the two adjacent electrode assemblies, and the other of the first wall surface (12) and the second wall surface (13) corresponds to the other of the two adjacent electrode assemblies. The stepped surface (14) is disposed opposite to the partition (11).

4. The battery according to claim 3, characterized in that, The distance between the first wall surface (12) and the second wall surface (13) along the second direction is C, and the value of C ranges from 0.3mm to 2mm.

5. The battery according to any one of claims 2-4, characterized in that, The tabs of all the electrode assemblies are located at the end of the electrode assembly facing the first end, and the protective plate (3) is located at the first end.

6. The battery according to claim 5, characterized in that, The number of electrode assemblies is two, namely a first electrode assembly and a second electrode assembly, and the length of the first electrode assembly along the third direction is greater than the length of the second electrode assembly along the third direction; the battery cell includes a first sub-section (21) and a second sub-section (22), the first sub-section (21) includes the first electrode assembly and a first membrane shell portion encapsulating the first electrode assembly, and the second sub-section (22) includes the second electrode assembly and a second membrane shell portion encapsulating the second electrode assembly; the end of the first sub-section (21) facing the first end protrudes along the third direction from the end of the second sub-section (22) facing the first end; The protective plate (3) includes a base portion (31) and a flexible electrical adapter portion (32) connected to the base portion (31). The base portion (31) is located at the end of the second sub-part (22) facing the first end and is connected to the tab of the second electrode assembly. The flexible electrical adapter portion (32) is connected to the tab of the first electrode assembly.

7. The battery according to claim 6, characterized in that, The first end is provided with: The first top edge (15) is bent toward the end face of the first sub-part (21); The second top seal (16) extends along the third direction toward the end face away from the second sub-part (22); The housing (1) has a first side sealing edge (17) on one side along the first direction. The first side sealing edge (17) is connected to the second top sealing edge (16). The first side sealing edge (17), the second top sealing edge (16), the portion of the first sub-part (21) protruding from the second sub-part (22) along the third direction, and the end face of the second sub-part (22) facing the first end form a top sealing groove. The base part (31) is disposed in the top sealing groove.

8. The battery according to claim 7, characterized in that, The first sub-part (21) protrudes along the third direction from the second sub-part (22) towards the first end by a length D, where D ranges from 1mm to 4mm; the base part (31) has a dimension E along the third direction, where D < E < D + 2mm; and / or, The distance between the end of the second top seal (16) away from the second sub-part (22) and the end of the first sub-part (21) facing the first end is F, where F < 1 mm.

9. The battery according to claim 7, characterized in that, A first insulating adhesive (4) is provided between the protective plate (3) and the first top sealing edge (15); a second insulating adhesive (5) is provided between the protective plate (3) and the second top sealing edge (16); and / or, The first end and the outer surface of the protective plate (3) are covered with a third insulating adhesive (6); and / or, The housing (1) has a second side sealing edge (18) on one side along the first direction. The second side sealing edge (18) is connected to the first top sealing edge (15) and the two form a corner protrusion (19). The corner protrusion (19) is pressed onto the first top sealing edge (15). The housing (1) is connected to an adhesive fastener (7), which covers the corner protrusion (19).

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

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