Battery and electric equipment

Abstract

The present invention discloses a battery and electric equipment, the battery comprises: a membrane shell, which is provided with at least two pits arranged side by side along a first direction, each pit is used for arranging an electrode assembly, the membrane shell encapsulates all the electrode assemblies to form a battery cell, the battery cell comprises at least two sub-parts and a separation sealing edge connected between any two adjacent sub-parts, each sub-part comprises an electrode assembly and a membrane shell part for packaging the electrode assembly, two adjacent pits are isolated by the separation sealing edge, and any two adjacent sub-parts and the separation sealing edge between the two adjacent sub-parts form a groove; and the protection plate is arranged in the at least one groove and is electrically connected with the tabs of the electrode assemblies respectively. The multiple pits are formed in the membrane shell to form the integrated multi-pit structure, and one electrode assembly is arranged in each pit to achieve the integrated multi-electrode assembly structure. The protective plate is arranged in the groove, and the space between the two sub-parts is fully utilized, so that the battery structure is compact, the battery can accommodate more active substances under the same volume, 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 films (such as perforated sidewalls and side seals) between adjacent cells, and the assembly gaps between these multiple layers of encapsulation films. 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 membrane housing has at least two recesses arranged side by side along a first direction, each recess holding an electrode assembly. The membrane housing encapsulates all the electrode assemblies to form a battery cell. The battery cell includes at least two sub-sections and a separating edge connecting any two adjacent sub-sections. Each sub-section includes an electrode assembly and a membrane housing portion encapsulating the electrode assembly. The separating edge isolates two adjacent recesses, and any two adjacent sub-sections and the separating edge between them form a groove.

[0010] A protective plate is disposed in at least one of the grooves and is electrically connected to the tabs of each of the electrode assemblies.

[0011] Optionally, the dividing seal is located on the side of the membrane shell away from the bottom wall of the recess.

[0012] Optionally, the dividing edge protrudes toward the side of the membrane shell away from the recess.

[0013] Optionally, the width of the groove along the first direction is A, and the value of A ranges from 1.5mm to 8mm; and / or,

[0014] The depth dimension of the groove along the second direction is B, the thickness dimension of the battery cell along the second direction is C, the width of the protection plate is D, and the thickness of the protection plate is E. When C is greater than a preset value, the width direction of the protection plate is the same as the second direction, and the value range of B is D < B < C - 0.4 mm; when C is less than the preset value, the thickness direction of the protection plate is the same as the second direction, and the value range of B is E < B < C - 0.4 mm.

[0015] Optionally, the membrane shell has a first end and a second end at its two ends along a third direction, and there are two electrode assemblies, namely a first electrode assembly and a second electrode assembly. The tab of the first electrode assembly is located at the end of the first electrode assembly facing the first end, and the tab of the second electrode assembly is located at the end of the second electrode assembly facing the second end, wherein the third direction is perpendicular to the first direction.

[0016] Optionally, one end of the protective plate is provided with a first adapter and the other end is provided with a second adapter. The first adapter is connected to the tab of the first electrode assembly, and the second adapter is connected to the tab of the second electrode assembly; and / or,

[0017] One end of the protection board is provided with a third adapter for connecting to the electronic components of the electrical equipment.

[0018] Optionally, an adhesive with a buffering function is provided between the protective plate and the groove.

[0019] Optionally, it also includes:

[0020] A first adhesive fastener is disposed at the opening of the groove and is connected to two adjacent membrane shell portions respectively; and / or,

[0021] The second adhesive fastener is located on the side of the dividing seal away from the groove and is connected to the two adjacent membrane shell portions respectively.

[0022] Optionally, it also includes:

[0023] An insulating adhesive element covers the connection point between the tab and the protective plate of each of the electrode assemblies; and / or,

[0024] A double-sided adhesive is provided on the outer wall of the membrane housing on one side corresponding to each of the electrode assemblies.

[0025] An electrical device comprising any of the aforementioned batteries.

[0026] The battery provided by this invention has at least the following beneficial effects:

[0027] By setting at least two recesses arranged side-by-side along a first direction on the membrane shell, an integrated multi-recess structure is formed, and an electrode assembly is set in each recess. All electrode assemblies are encapsulated by the membrane shell, forming an integrated multi-electrode assembly cell structure. This cell structure includes at least two sub-sections, each including an electrode assembly and a membrane shell portion encapsulating the electrode assembly. Adjacent sub-sections are connected by a separating seal, ensuring that multiple sub-sections are connected together and that multiple recesses are isolated from each other. Simultaneously, a groove is formed using the gap between the membrane shell portions of adjacent sub-sections and the separating seal connecting the two sub-sections, and a protective plate is placed within the groove. This fully utilizes the space between adjacent sub-sections, avoiding wasted space in the area between the two sub-sections, resulting in a compact battery structure. This saves the space occupied by conventional protective plate placement methods in related technologies. Furthermore, placing the protective plate within the groove is equivalent to moving a portion of the protective plate, originally positioned along the length of the battery, to a position between the two sub-sections. This allows for more space along the length of the battery to accommodate electrode assemblies. Therefore, within the same volume, the battery can accommodate more active material, thereby increasing the overall energy density of the battery.

[0028] In addition, the use of a separator seal achieves physical isolation between two adjacent pits, preventing safety risks caused by electrolyte cross-flow between multiple electrode components.

[0029] 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

[0030] 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.

[0031] Figure 1 An exploded view of a battery provided in a specific embodiment of the present invention;

[0032] Figure 2 for Figure 1 A front view of the assembled battery shown.

[0033] Figure 3for Figure 1 The diagram shows the reverse side of the assembled battery.

[0034] Figure 4 This is a schematic diagram of the structure after the electrode assembly is encapsulated in a membrane shell.

[0035] Figure 5 for Figure 4 Top view;

[0036] Figure 6 This is a schematic diagram showing the dimensions of the groove;

[0037] Figure 7 A structural schematic diagram of the protective plate from a first-person perspective;

[0038] Figure 8 A structural schematic diagram of the protective plate from a second perspective;

[0039] Figure 9 This is a schematic diagram of the structure before the adhesive component and the groove are assembled.

[0040] Figure 10 A schematic diagram showing the structure after the protective plate is placed in the groove;

[0041] Figure 11 for Figure 10 Top view;

[0042] Figure 12 for Figure 10 Side view;

[0043] Figure 13 for Figure 12 A magnified view of part A in the diagram;

[0044] Figure 14 This is a schematic diagram showing the first adhesive fastener connected to the membrane shell.

[0045] Figure 15 This is a schematic diagram showing the second adhesive fastener connected to the membrane shell.

[0046] Figure 16 A schematic diagram showing the tabs of each electrode assembly covered by an insulating adhesive.

[0047] Figure 17 This is a schematic diagram showing the double-sided adhesive strips attached to the membrane housing at the positions of each electrode assembly.

[0048] Figure label:

[0049] 1-Membrane housing; 11-Membrane housing section; 12-Separating edge seal; 13-Groove; 21-First electrode tab; 22-Second electrode tab; 3-Protective plate; 31-First adapter; 32-Second adapter; 33-Third adapter; 4-Adhesive component; 5-First adhesive fastener; 6-Second adhesive fastener; 7-Insulating adhesive component; 8-Double-sided adhesive component. Detailed Implementation

[0050] 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.

[0051] 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.

[0052] 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 and Figure 6 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.

[0053] Please refer to Figure 1 , Figure 2 and Figure 3 This invention provides a battery including a membrane housing 1, electrode assemblies, and a protective plate 3. The membrane housing 1 has at least two recesses arranged side by side along a first direction. Each recess is used to house an electrode assembly. After the membrane housing encapsulates all the electrode assemblies, a battery cell is formed. The battery cell includes at least two sub-parts and a separating edge 12 connecting any two adjacent sub-parts. Each sub-part includes an electrode assembly and a membrane housing part 11 that encapsulates the electrode assembly. The separating edge 12 isolates two adjacent recesses. Any two adjacent sub-parts and the separating edge 12 between them form a groove 13. The number of electrode assemblies is equal to the number of recesses. Each recess contains one electrode assembly. Each electrode assembly 2 includes a tab. The protective plate 3 is disposed in at least one groove 13 and is electrically connected to the tabs of each electrode assembly.

[0054] In other words, this embodiment forms an integrated multi-pit structure by providing at least two recesses arranged side-by-side along a first direction on the membrane shell 1, and providing an electrode assembly in each recess. The membrane shell 1 encapsulates all the electrode assemblies, forming an integrated multi-electrode assembly cell structure. This cell structure includes at least two sub-sections, each sub-section including an electrode assembly and a membrane shell 11 that encapsulates the electrode assembly. Adjacent sub-sections are connected by a separating sealing edge 12, ensuring that multiple sub-sections are connected together and that multiple recesses are isolated from each other. Meanwhile, by utilizing the gap between the membrane shell portion 11 of two adjacent sub-parts and the separating sealing edge 12 connecting the two sub-parts, a groove 13 is formed, and the protection plate 3 is placed in the groove 13. This makes full use of the space between the two adjacent sub-parts, avoiding the waste of space in the area between the two sub-parts, making the battery structure compact and saving the space occupied by the conventional placement of the protection plate 3 in related technologies. In addition, after placing the protection plate 3 in the groove 13, it is equivalent to moving a part of the protection plate that was originally placed along the length of the battery to the position between the two sub-parts, thereby leaving more space in the length of the battery to place the electrode components. Therefore, the battery can accommodate more active materials in the same volume, thereby improving the overall energy density of the battery.

[0055] In addition, it is understandable that the use of the separator sealing edge 12 to achieve physical isolation between two adjacent pits prevents the safety risks caused by electrolyte cross-flow between multiple electrode components.

[0056] It should be noted that this embodiment does not limit the specific material and formation method of the membrane shell 1. For example, the membrane shell 1 is an integrally formed aluminum-plastic film. During processing, a forming mold is used to stamp on the membrane shell to form at least two recesses arranged side by side along the first direction. A flat area that is not stamped is reserved between two adjacent recesses. This flat area is part of the separating edge 12. Thus, a groove 13 is formed between the outer walls of two adjacent recesses. After the membrane shell wraps multiple electrode components and performs top and side sealing, the membrane shell at the opening of each recess covers the opening of the recess, thereby forming a cavity in each recess. By hot-pressing the membrane shell at the position corresponding to the separating edge 12 in space (that is, the position between two adjacent recesses), the two layers of membrane shell at the position corresponding to the separating edge 12 are thermally fused together to form the separating edge 12, thereby forming a physical isolation between each recess.

[0057] As can be seen, this embodiment can encapsulate the multi-electrode assembly in one go, integrating multiple components that need to be processed separately in related technologies (such as two independent cells, the protection board assembly corresponding to the two independent cells, and the fixing structure corresponding to the two cells) into an integrated module. That is, a battery with multi-electrode assembly function can be produced in one process, which helps to simplify the process steps. When in use, the battery can be installed and used as a whole unit, which greatly simplifies the subsequent assembly process, thereby improving production efficiency and reducing manufacturing costs.

[0058] In addition, it should be noted that the specific position of the dividing edge 12 is not limited in this embodiment, as long as the dividing edge 12 can connect the two sub-parts.

[0059] In some embodiments, the partition seal 12 is located on the side of the membrane shell 1 away from the bottom wall of the recess.

[0060] Understandably, the partition seal 12 is located on the side of the bottom wall of the membrane shell 1 away from the recess, which is conducive to forming a larger groove 13 between the two sub-parts and the partition seal 12, thereby providing a larger space for the protective plate 3 to be installed.

[0061] Furthermore, in some embodiments, the dividing seal 12 protrudes toward the side of the film shell 1 away from the recess.

[0062] In other words, the partition seal 12 protrudes from the side of the membrane shell 1 away from the recess, so as to further increase the space of the groove 13 formed between the two sub-parts and the partition seal 12, making it easier to install the protective plate 3.

[0063] It should be noted that the above embodiments do not limit the specific size of the groove 13. In principle, while ensuring the installation of the protection plate 3 and ensuring effective isolation between two adjacent grooves, the smaller the size of the groove 13, the more beneficial it is to improve the energy density of the cell 2.

[0064] Please refer to Figure 4 , Figure 5 and Figure 6 In some embodiments, the width dimension of the groove 13 along the first direction is A, and the value of A ranges from 1.5mm to 8mm.

[0065] Understandably, if the value of A is too small, the seal between two adjacent recesses may be unreliable, leading to electrolyte flow between adjacent electrode assemblies. Simultaneously, the space for the protection plate 3 may be too small, hindering its placement. Conversely, if the value of A is too large, significant space is wasted on the electrode assemblies, resulting in a loss of energy density. Furthermore, the greater distance between adjacent electrode assemblies can cause relative swaying between them. Therefore, in this embodiment, the value of A ranges from 1.5mm to 8mm. This size, while ensuring effective isolation between the two electrode assemblies and providing installation space for the protection plate 3, minimizes the necessary assembly gap in dual-cell solutions in related technologies, thereby improving overall space utilization and energy density. For example, the value of A can be 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, or 7.5mm.

[0066] In addition, such as Figure 6 As shown, in some embodiments, the depth dimension of the groove 13 along the second direction is B, the thickness dimension of the battery cell 2 along the second direction is C, the width of the protection plate 3 is D, and the thickness of the protection plate 3 is E. When C is greater than a preset value, the width direction of the protection plate 3 is the same as the second direction, and the value range of B is D < B < C - 0.4 mm; when C is less than the preset value, the thickness direction of the protection plate 3 is the same as the second direction, and the value range of B is E < B < C - 0.4 mm.

[0067] In other words, the depth dimension B of the groove 13 along the second direction is related to the thickness C of the battery cell 2 and the size of the protection plate 3, so as to meet the requirement of arranging the protection plate 3 in the groove 13. When C is greater than the preset value, that is, the thickness dimension of the battery cell 2 is relatively large, for example, when C is greater than 4mm, the protection plate 3 can be placed vertically in the groove 13, that is, the width direction of the protection plate 3 is the same as the second direction. At this time, the value of B is in the range of D < B < C - 0.4mm. For example, the value of D can be 3.5mm. When C is less than the preset value, that is, the thickness dimension of the battery cell 2 is relatively small, for example, when C is less than 4mm, the protection plate 3 can be placed flat in the groove 13, that is, the thickness direction of the protection plate 3 is the same as the second direction. At this time, the value of B is in the range of E < B < C - 0.4mm. For example, the value of E can be 1.5mm.

[0068] It should be noted that the above embodiments do not limit the specific connection method between the protective plate 3 and the tabs of the electrode assembly. The tabs of different electrode assemblies can be distributed at both ends of the membrane housing 1 or at one end of the membrane housing 1, as long as the connection between the protective plate 3 and the tabs of each electrode assembly can be achieved. When there are two electrode assemblies, a groove 13 is formed on the outer wall of the membrane housing 1, and the protective plate 3 is located in the groove 13. When there are at least three electrode assemblies, at least two grooves 13 are formed on the outer wall of the membrane housing 1. In this case, the number of protective plates 3 can be one or at least two. When there is one protective plate 3, the protective plate 3 is located in one groove 13. When there are at least two protective plates 3, the protective plates 3 can be located in different grooves 13.

[0069] In addition, such as Figure 10 and Figure 11 As shown, in order to facilitate the connection between the protection plate 3 and each electrode assembly, in some embodiments, the two ends of the membrane shell 1 along the third direction are the first end and the second end, respectively. There are two electrode assemblies, namely the first electrode assembly and the second electrode assembly. The tab of the first electrode assembly is located at the end of the first electrode assembly facing the first end, and the tab of the second electrode assembly is located at the end of the second electrode assembly facing the second end.

[0070] In other words, in this embodiment, the tabs of the first electrode assembly and the second electrode assembly are located at both ends of the membrane housing 1 along a third direction, so that the two ends of the protective plate 3 can be connected to the tabs of the first electrode assembly and the second electrode assembly respectively.

[0071] Furthermore, such as Figure 7 and Figure 8 As shown, in some embodiments, one end of the protection plate 3 is provided with a first adapter 31 and the other end is provided with a second adapter 32. The first adapter 31 is connected to the tab of the first electrode assembly, and the second adapter 32 is connected to the tab of the second electrode assembly.

[0072] It should be noted that the protection board 3 can be a rigid printed circuit board that integrates components such as charge and discharge management and protection integrated circuits. The rigid printed circuit board is beneficial to improving the structural stability of the protection board 3. Placing the rigid printed circuit board in the groove 13 is beneficial to improving the stability and safety of the protection board 3.

[0073] Furthermore, it is understood that the first adapter 31 and the second adapter 32 can be flexible to reliably connect with the tabs of the first electrode assembly and the second electrode assembly through adaptive bending, etc. For example, the first adapter 31 and the second adapter 32 can each be a flexible circuit board.

[0074] Additionally, it should be noted that this embodiment does not limit the number of the first adapter 31 and the second adapter 32, as long as the protection plate 3 can be connected to the tabs of the first electrode assembly and the second electrode assembly respectively. For example, the first electrode assembly includes two first tabs 21 and two first adapters 31. One of the two first adapters 31 is connected to one of the two first tabs 21, and the other of the two first adapters 31 is connected to the other of the two first tabs 21. The two first adapters 31 can be disposed on both sides of one end of the protective plate 3 along the third direction, or on one side of one end of the protective plate 3 along the third direction. Similarly, the second electrode assembly includes two second tabs 22 and two second adapters 32. One of the two second adapters 32 is connected to one of the two second tabs 22, and the other of the two second adapters 32 is connected to the other of the two second tabs 22. The two second adapters 32 can be disposed on both sides of the other end of the protective plate 3 along the third direction, or on one side of the other end of the protective plate 3 along the third direction.

[0075] Of course, in some other embodiments, the number of the first adapter 31 and the second adapter 32 can be one each. The first adapter 31 and the second adapter 32 are each provided with two electrode tabs. The two electrode tabs of the first adapter 31 are connected to the two first electrodes 21, and the two electrode tabs of the second adapter 32 are connected to the second electrodes 22.

[0076] In addition, in order to facilitate the connection between the protection board 3 and the electronic components of the electrical equipment, in some embodiments, a third adapter 33 is provided at one end of the protection board 3, which is used to connect to the electronic components of the electrical equipment.

[0077] In other words, this embodiment uses a third adapter 33 to connect the protection board 3 to the electrical equipment. The third adapter 33 is a flexible connector that can be easily connected to the electrical equipment through adaptive bending.

[0078] It should be noted that the third adapter 33 can be located at either end of the protection plate 3 along a third direction.

[0079] In addition, such as Figure 9 , Figure 12 and Figure 13 As shown, in order to fix the protective plate 3 to the groove 13, in some embodiments, an adhesive 4 with a buffering function is provided between the protective plate 3 and the groove 13.

[0080] In other words, in this embodiment, an adhesive 4 is provided between the protective plate 3 and the groove 13 to achieve the bonding and fixing of the protective plate 3 and the groove 13. At the same time, the adhesive 4 has a buffering effect and can absorb vibration, which helps to ensure the reliability of the protective plate 3.

[0081] It should be noted that the specific structure of the adhesive component 4 is not limited in this embodiment. For example, the adhesive component 4 can be foam double-sided tape. During assembly, the foam double-sided tape is pasted into the groove 13, and then the protective plate 3 is placed into the groove 13, so that the protective plate 3 is bonded and fixed to the foam double-sided tape, thereby fixing the protective plate 3 in the groove 13 and ensuring the reliability of the position of the protective plate 3.

[0082] In addition, such as Figure 14 and Figure 15 As shown, in order to improve the overall stability of the battery, in some embodiments, the battery further includes a first adhesive fastener 5 and / or a second adhesive fastener 6. The first adhesive fastener 5 is disposed at the groove opening of the groove 13 and is connected to two adjacent membrane shell parts 11 respectively; the second adhesive fastener 6 is disposed on the side of the separating sealing edge 12 away from the groove 13 and is connected to two adjacent membrane shell parts 11 respectively.

[0083] In other words, this embodiment uses a first adhesive fastener 5 and a second adhesive fastener 6 that span the front and / or back of the groove 13 along the first direction to connect and fix the two membrane shell parts 11 on both sides of the groove 13. This is equivalent to binding the two membrane shell parts 11 into a stable whole, which serves to fix the two adjacent sub-parts, improve the stability of the overall battery structure, and at the same time prevent the protection plate 3 from shifting, thus helping to prevent the protection plate 3 from detaching from the groove 13. The first adhesive fastener 5 and the second adhesive fastener 6 can be adhesive tape, respectively.

[0084] In addition, such as Figure 16 As shown, in some embodiments, the battery further includes an insulating adhesive 7, which covers the connection position between the tabs of each electrode assembly and the protective plate 3.

[0085] In other words, in this embodiment, the insulating adhesive 7 is used to wrap the electrode tabs of the electrode assembly and the connection position with the protective plate 3, so as to achieve the functions of insulation protection and fixation.

[0086] In addition, such as Figure 17 As shown, in some embodiments, the outer wall of the membrane housing 1 corresponding to each electrode assembly is provided with a double-sided adhesive 8.

[0087] In other words, in this embodiment, a double-sided adhesive piece 8 is attached to the outer wall of each electrode assembly in the space of the membrane housing 1. It can be understood that the side of the double-sided adhesive piece 8 away from the membrane housing 1 has a release liner, so that when the battery is applied to an electrical device, the release liner can be removed, and the battery can be bonded to the battery compartment of the electrical device. This prevents the battery from shifting when the electrical device is dropped or vibrated, ensuring the reliability of the battery during use. The double-sided adhesive piece 8 can be double-sided tape.

[0088] In addition to the battery described above, this embodiment of the 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] 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 by, The application relates to a battery cell, comprising: a film shell (1) provided with at least two concaves arranged side by side along a first direction, each of the concaves being arranged with an electrode assembly, the film shell encapsulating all the electrode assemblies to form an electric cell, the electric cell comprising at least two subparts and a separation sealing edge (12) connected between any two adjacent subparts, each of the subparts comprising one of the electrode assemblies and a film shell part (11) encapsulating the electrode assembly, the separation sealing edge (12) separating the two adjacent concaves, and any two adjacent subparts and the separation sealing edge (12) therebetween forming a groove (13); a protection plate (3) arranged in the groove (13) and electrically connected with the tab of each electrode assembly.

2. The battery of claim 1, wherein, The separation sealing edge (12) is located on a side of the film shell (1) away from the bottom wall of the concave.

3. The battery of claim 2, wherein, The separation sealing edge (12) is protruded to the side of the film shell (1) away from the concave.

4. The battery of claim 1, wherein, The groove (13) has a width dimension A along the first direction, and the value range of A is 1.5mm-8mm; and / or, The groove (13) has a depth dimension B along a second direction, the electric cell has a thickness dimension C along the second direction, the protection plate (3) has a width D, and the protection plate (3) has a thickness E; When C is greater than a preset value, the width direction of the protection plate (3) is the same as the second direction, and the value range of B is D When C is less than the preset value, the thickness direction of the protection plate (3) is the same as the second direction, and the value range of B is E 5. The battery according to any one of claims 1 to 4, characterized in that, The film shell (1) has a first end and a second end along a third direction, the number of the electrode assemblies is two, and the two electrode assemblies are a first electrode assembly and a second electrode assembly, the tab of the first electrode assembly is arranged at an end of the first electrode assembly facing the first end, and the tab of the second electrode assembly is arranged at an end of the second electrode assembly facing the second end, wherein the third direction is perpendicular to the first direction.

6. The battery of claim 5, wherein, One end of the protection plate (3) is provided with a first adapter (31), and the other end is provided with a second adapter (32), the first adapter (31) is connected with the tab of the first electrode assembly, and the second adapter (32) is connected with the tab of the second electrode assembly; and / or, One end of the protection plate (3) is provided with a third adapter (33) for being connected with an electric device.

7. The battery according to any one of claims 1 to 4, wherein A buffer adhesive (4) is arranged between the protection plate (3) and the groove (13).

8. The battery according to any one of claims 1 to 4, wherein Further comprising: a first adhesive fixing member (5) arranged at a groove opening of the groove (13) and connected with two adjacent film shell parts (11); and / or, a second adhesive fixing member (6) arranged at a side of the separation sealing edge (12) away from the groove (13) and connected with two adjacent film shell parts (11).

9. The battery according to any one of claims 1 to 4, wherein Further comprising: an insulating adhesive (7) covering the connection position of the tab of each electrode assembly and the protection plate (3); and / or, Double-sided adhesive member (8) is arranged on the outer wall of the film shell (1) corresponding to each electrode assembly.

10. An electric device, characterized by The battery comprises the battery of any one of claims 1-9.

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