A battery and an electric device

Abstract

The application relates to the technical field of energy storage devices, and particularly discloses a battery and a power utilization device. The battery comprises a battery cell, a connecting component and a limiting component. The battery cell comprises an electrode assembly and a shell, the electrode assembly is arranged in the shell, the shell has a first side surface, the first side surface is located at one end of the shell along a first direction, at least two battery cells are distributed along a second direction, and the first direction is perpendicular to the second direction. The connecting component is at least partially filled between the adjacent two battery cells and is fixedly connected with the adjacent shells. The limiting component has a battery compartment fixing part, and the limiting component is at least partially arranged on the first side surface of the at least two battery cells. The battery provided by the application can limit the relative misalignment of the adjacent battery cells along the first direction through the limiting component, can reduce the risk of shell rupture under the premise of ensuring the battery capacity, and can improve the reliability and safety of the battery.

Description

Technical Field

[0001] This application relates to the field of energy storage device technology, and more specifically, to a battery and an electrical device. Background Technology

[0002] As electronic products become increasingly intelligent, their power consumption is also increasing. To ensure that these products have a reasonable usage time, it is necessary to continuously increase battery capacity. Currently, the battery capacity of portable electronic products such as mobile phones has exceeded 10Ah and is developing towards 12Ah and even 15Ah.

[0003] As battery capacity continues to increase, battery weight also increases significantly; for example, a 10Ah battery weighs over 100g. This increased weight makes existing battery-to-device mounting methods insufficient for reliability requirements. During drop, tumbling, and micro-drop reliability tests, batteries are prone to shifting. This includes both overall battery movement and, even if the battery is securely fixed, the electrode components can still shift, impacting the cell casing (such as the aluminum-plastic film).

[0004] For large-capacity batteries containing at least two cells, the end of each cell with a protection plate is typically fixed to the protection plate using methods such as glue injection. However, because the sides of the cells usually have rounded corners or other transitional structures, the connecting medium can easily overflow between the two cells and adhere to the cell casing. Under conditions such as drops, relative misalignment can easily occur between adjacent cells, causing localized stress on the casing at the connection point, resulting in localized casing cracking and affecting the reliability and safety of the battery. Summary of the Invention

[0005] In view of this, the purpose of this application is to provide a battery and an electrical device, the structural design of which can effectively solve the problem of relative misalignment between adjacent cells causing localized cracking of the casing.

[0006] To achieve the above objectives, this application provides the following technical solution: A battery comprising: At least two battery cells, each battery cell including an electrode assembly and a housing, the electrode assembly being disposed within the housing, the housing having a first side surface located at one end of the housing along a first direction, and the at least two battery cells being distributed along a second direction, the first direction being perpendicular to the second direction; A connecting component, which is at least partially filled between two adjacent cells and fixedly connected to an adjacent housing; A limiting component having a battery compartment fixing portion, the limiting component being at least partially disposed on the first side of at least two of the battery cells.

[0007] Optionally, in the above-described battery, the casing includes a first surface, and the first side is connected to one end of the first surface along the first direction; the limiting member includes a main body and a first bent portion connected to the main body, and the first bent portion is disposed on the first side of at least two of the battery cells; The main body is fixed to the first surface of at least two adjacent cells, or the main body is adhered to the first surface of at least two cells by a first adhesive layer.

[0008] Optionally, in the battery described above, the casing includes two second sides and a side sealing edge extending from at least one of the second sides, the two second sides being respectively connected to the two ends of the first surface along the second direction, and the side sealing edge being bent toward the second side; The limiting component has a first notch, which is located at the first bending portion and extends at least to the main body portion. The side sealing portion between two adjacent battery cells is located within the first notch.

[0009] Optionally, in the battery described above, a first insulating layer is provided between the main body and the casing. Along the second direction, the first insulating layer covers the edge of the side sealing edge of two adjacent cells. Along the third direction, the overlapping portion of the projection of the side sealing edge and the projection of the limiting component is located within the projection range of the first insulating layer. The first direction, the second direction, and the third direction are perpendicular to each other.

[0010] Optionally, in the battery described above, the casing includes a third side surface, the third side surface and the first side surface are respectively connected to the two ends of the first surface along the first direction, and a protrusion is formed at the connection between the third side surface and the second side surface; The limiting component has a second notch, and the protrusions of two adjacent battery cells are located within the second notch.

[0011] Optionally, in the battery described above, the housing includes a second side surface connected to both ends of the first surface along the second direction, and the limiting member further includes at least one second bent portion connected to at least one end of the main body along the second direction, the second bent portion being disposed on the outermost second side surface along the second direction.

[0012] Optionally, in the battery described above, the casing includes an arcuate portion connecting the first surface and the second side surface, the arcuate portion extending along the first direction to the first side surface, the limiting member including a fourth notch, the fourth notch being located between the first bent portion and the second bent portion and extending at least to the main body portion, and one end of the arcuate portion connected to the first side surface being exposed through the fourth notch.

[0013] Optionally, in the battery described above, the dimension of the fourth notch along the second direction is greater than the distance between the first bent portion and the second bent portion along the second direction.

[0014] Optionally, in the above-mentioned battery, a gap is formed between two adjacent cells; The connecting component includes a main connecting portion and an extension portion connected to the main connecting portion. The main connecting portion is disposed on the first side of at least two of the battery cells, and the extension portion is disposed within the gap and fixedly connected to the housing on both sides of the gap.

[0015] The battery provided in this application includes a battery cell, a connecting component, and a limiting component. The battery cell includes an electrode assembly and a housing. The electrode assembly is disposed within the housing, which has a first side surface located at one end along a first direction. At least two battery cells are distributed along a second direction, which is perpendicular to the first direction. The connecting component at least partially fills the space between two adjacent battery cells and is fixedly connected to adjacent housings. The limiting component has a battery compartment fixing portion and is at least partially disposed on the first side surface of at least two battery cells.

[0016] Using the battery provided in this application, a limiting component is provided. This limiting component has a battery compartment fixing part, through which the battery can be fixed to the battery compartment. Therefore, the position of the limiting component relative to the battery compartment is fixed in the battery installation state. Furthermore, at least a portion of the limiting component is located on the first side of at least two battery cells, thereby utilizing the rigidity of the limiting component itself to form a limiting structure, limiting the first side of adjacent battery cells and constraining the relative misalignment of adjacent battery cells along the first direction. Thus, even with increased battery capacity and overall weight, adjacent battery cells are less likely to experience relative movement during reliability tests such as drop tests, tumbling tests, and micro-drop tests, or during actual use, reducing the risk of adjacent housings connected by the connecting components breaking due to localized stress. In addition, the limiting component can also restrict the movement of the electrode assembly within the housing, preventing the electrode assembly from impacting the housing and reducing the risk of housing deformation or breakage caused by the electrode assembly impacting the housing.

[0017] In summary, the battery provided in this application, by setting a limiting component to restrict the relative misalignment of adjacent cells along the first direction, can reduce the risk of casing breakage and improve the reliability and safety of the battery while ensuring battery capacity.

[0018] To achieve the above objectives, this application also provides an electrical device comprising any of the aforementioned batteries. Since the batteries described above possess the aforementioned technical effects, the electrical device incorporating such batteries should also possess the corresponding technical effects. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the assembly of a battery cell and a protection board according to a specific embodiment of this application; Figure 2 for Figure 1 A magnified view of a portion of the image; Figure 3 This is a schematic diagram illustrating the interaction of a battery cell, a protection board, and connecting components according to a specific embodiment of this application. Figure 4 This is a schematic diagram of the battery structure of the first specific embodiment of this application (limiting components are not shown). Figure 5 for Figure 4 A schematic diagram of a localized explosion; Figure 6 This is a front view schematic diagram of a battery according to a second specific embodiment of this application; Figure 7 for Figure 6 Enlarged diagram of part A; Figure 8 for Figure 6 Enlarged diagram of part B; Figure 9 for Figure 6 Enlarged schematic diagram of part C; Figure 10 This is a partial structural diagram of a battery according to a second specific embodiment of this application (the limiting component and the connecting component are not shown). Figure 11 This is a partial structural diagram of the battery according to the third specific embodiment of this application (connecting components are not shown). Figure 12 This is a partial structural diagram of the battery according to the fourth specific embodiment of this application (connecting components are not shown); Figure 13 This is a partial structural diagram of the battery according to the fifth specific embodiment of this application (connecting components are not shown). Figure 14 This is a magnified view of a portion of the connecting protrusions; Figure 15 This is a partial structural diagram of the battery according to the fifth specific embodiment of this application (connecting components are not shown).

[0021] Figure label: 1-Battery cell; 11-Electrode assembly; 12-Housing; 121-First side; 122-First surface; 123-Second side; 124-Third side; 125-Top sealing edge; 125a-Outer edge; 126-Side sealing edge; 127-Protrusion; 128-Arc-shaped portion; 111-Taper; 2-Connecting component; 21-Main connecting part; 22-Extension part; 3-Limiting component; 31-Battery compartment fixing part; 311-Connecting protrusion; 312-Screw hole; 32-Main body; 33-First bending part; 33a-First sub-bending part; 34-Second bending part; 35-Third bending part; 36a-First notch; 36b-Second notch; 36c-Third notch; 36d-Fourth notch; 4-First adhesive layer; 5-First insulating layer; 6-Second insulating layer; 7-Protective board; 71-Components; 8-Second adhesive layer. Detailed Implementation

[0022] This application discloses a battery and an electrical device to constrain the relative misalignment between adjacent cells, reduce the risk of casing breakage, and improve the reliability and safety of the battery.

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] The battery provided in this application is particularly suitable for pouch batteries with larger capacity and heavier weight, such as batteries with a capacity of 10Ah and above, even 12Ah and 15Ah, but this application is not limited thereto. The specific structure of the battery is described in detail below with reference to the accompanying drawings.

[0025] Please see Figure 1 and Figure 2 The battery includes a cell 1. Cell 1 is the main part of the battery responsible for storing electrical energy. The cell 1 provided in this application includes an electrode assembly 11. The electrode assembly 11 can be arranged by winding or stacking pre-cut positive electrodes, separators, and negative electrodes. One end of the electrode assembly 11 extends into a tab 111 for electrical connection with a protection plate 7. The tab 111 can specifically be configured as a positive tab and a negative tab. For example, there can be two tabs 111, one of which is a positive tab and the other is a negative tab. Alternatively, there can be more than two tabs 111; for example, the cell 1 body is connected to three tabs 111, one of which is a positive tab, and the other two are negative tabs connected in parallel.

[0026] For a pouch battery, a housing 12 is also included. The housing 12 has a receiving cavity, in which the electrode plates and separator of the electrode assembly 11 are disposed. The tabs 111 extending from the electrode assembly 11 protrude from the housing 12 for electrical connection with the protection plate 7. Exemplarily, the housing 12 includes a housing body and an encapsulation portion, with the receiving cavity enclosed by the housing body. The housing body has a first side 121 and a first surface 122 and a second surface adjacent to the first side 121. The first side 121 is located at one end of the first surface 122 and the second surface along a first direction. In this application, for ease of description, a first direction, a second direction, and a third direction of the battery are defined, and the first direction, the second direction, and the third direction are perpendicular to each other. Exemplarily, the first direction can be the length direction of the battery, the second direction can be the width direction of the battery, and the third direction can be the thickness direction of the battery. The first surface 122 and the second surface are sequentially distributed along the third direction, with a certain interval between them. Exemplarily, the first surface 122 and the second surface are the two large surfaces of the cell 1. The housing body may also include a second side 123 located at at least one end of the first surface 122 along the second direction. The main housing 12 may also include a third side 124, with the first side 121 and the third side 124 located at the two ends of the first surface 122 along the first direction. Figure 1 and Figure 2 In this embodiment, the tab 111 extends from the first side surface 121. That is, the side wall from which the tab 111 extends is designated as the first side surface 121. In other embodiments, it is not limited to this, such as when the tab 111 extends from the third side surface 124.

[0027] The encapsulation portion includes a top sealing edge 125, which is connected to and extends from a first side surface 121, and an electrode tab 111 extends from the top sealing edge 125. The encapsulation portion may also include a side sealing edge 126, which is connected to at least one second side surface 123. It is understood that the second side surface 123 refers to the wall surface surrounding the receiving cavity, and the second side surface 123 does not include the side sealing edge 126. Specifically, the housing 12 may be made of a polymer film, such as an aluminum-plastic film material, which is sealed and pressed together to ensure a tight seal. Exemplarily, the housing 12 includes a first film and a second film, the first film forming a cavity, and the second film connected to the first film around the cavity to form the receiving cavity, and forming the side sealing edge 126 and the top sealing edge 125.

[0028] The battery provided in this application includes at least two cells; please refer to [link / reference]. Figure 3To improve battery safety, a connecting component 2 can be provided at one end of the cell 1 extending from the tab 111. The connecting component 2 can be formed by injection molding, such as injection molding in the head area where the first side 121 is located. Since there may be gaps between two adjacent cells 1, molten material can easily fill the gaps between adjacent cells 1 and solidify, thereby partially connecting the shells 12 of adjacent cells 1. It is understood that the connecting component 2 can also be made of other methods such as glue filling or adhesive bonding. Since the connection between adjacent shells 12 is partial, the connection area is small, and when the adjacent shells 12 are relatively misaligned, the local stress concentration can easily tear the shells 12. Therefore, to prevent relative movement between adjacent cells, this application adds a limiting component to the above battery structure. The following embodiments mainly describe the cooperation between the limiting component and the cell 1.

[0029] Please see Figures 3-5 In some embodiments, the battery provided in this application includes a battery cell 1, a connecting component 2, and a limiting component 3. The battery cell 1 includes an electrode assembly 11 and a housing 12. The electrode assembly 11 is disposed within the housing 12. The housing 12 has a first side surface 121 located at one end of the housing 12 along a first direction. At least two battery cells 1 are distributed along a second direction, with the first direction perpendicular to the second direction. That is, at least two battery cells 1 are arranged side-by-side along the second direction. For example, the first side surfaces 121 of adjacent battery cells 1 are aligned along the second direction and face the same side.

[0030] The connecting component 2 is at least partially filled between adjacent battery cells 1 and fixedly connected to the adjacent housing 12. It is understood that the portion of the connecting component 2 filled between adjacent battery cells 1 serves to partially connect the adjacent housing 12. For example, the connection area of ​​the portion of the connecting component filled between adjacent battery cells 1 and fixedly connected to the adjacent housing 12 is much smaller than the area of ​​the housing 12.

[0031] The limiting component 3 has a battery compartment fixing part 31, and the limiting component 3 is at least partially disposed on the first side 121 of at least two battery cells 1. That is, the limiting component 3 at least partially covers and abuts against the first side 121 of adjacent battery cells 1, thereby limiting the first side 121 of adjacent battery cells 1. When adjacent battery cells 1 have different tendencies of movement along the first direction, their movement is limited by the blocking effect of the limiting component 3, thereby constraining the relative misalignment of adjacent battery cells 1 along the first direction. It can be understood that the limiting component 3 can be directly disposed on the first side 121, i.e., abutting against the first side 121, or it can be indirectly disposed on the first side 121 through an intermediate component, so as to indirectly abut against the first side 121. Both methods can prevent the relative misalignment of adjacent battery cells 1 along the first direction.

[0032] Using the battery provided in this application, by setting a limiting component 3, which has a battery compartment fixing part 31, the battery can be fixed to the battery compartment via the battery compartment fixing part 31. Therefore, the position of the limiting component 3 relative to the battery compartment is fixed in the battery installation state. Moreover, at least a part of the limiting component 3 is provided on the first side 121 of at least two battery cells 1, thereby using the rigidity of the limiting component 3 itself to form a limiting structure, limiting the first side 121 of adjacent battery cells 1, and constraining the relative misalignment of adjacent battery cells 1 along the first direction. As a result, even if the battery capacity increases and the overall weight increases, the adjacent battery cells 1 are less likely to move relative to each other during reliability tests such as drop, tumbling, and micro-drop tests or actual use, reducing the risk of the adjacent housing 12 connected by the connecting component 2 breaking due to local stress. In addition, the limiting component 3 can also limit the movement of the electrode assembly 11 within the housing 12, preventing the electrode assembly 11 from impacting the housing 12, and reducing the risk of the housing 12 deforming or breaking due to the impact of the electrode assembly 11.

[0033] In summary, the battery provided in this application, by setting the limiting component 3 to restrict the relative misalignment of adjacent cells 1 along the first direction, can reduce the risk of casing 12 breakage and improve the reliability and safety of the battery while ensuring battery capacity.

[0034] In some embodiments, the limiting member 3 is a rigid member. Specifically, the rigidity of the limiting member 3 is greater than the rigidity of the housing 12. For example, the limiting member 3 is a steel sheet. It should be noted that the limiting member 3 is not limited to a steel sheet, and can also be made of other rigid materials, such as aluminum alloy, titanium alloy sheet or engineering plastic sheet, as long as its rigidity is sufficient to limit the cell 1.

[0035] In some embodiments, the housing 12 includes a first surface 122, and a first side surface 121 is connected to one end of the first surface 122 along a first direction; the limiting member 3 includes a main body 32 and a first bent portion 33 connected to the main body 32. The first bent portion 33 is disposed on the first side surface 121 of at least two battery cells 1, and the main body 32 is fixedly disposed on the first surface 122 of at least two adjacent battery cells 1. Specifically, the main body 32 is generally plate-shaped and adapted to the first surface 122, and the first surface 122 of adjacent battery cells 1 is fixedly connected to the main body 32. The first bent portion 33 is disposed on the first side surface 121 of adjacent battery cells 1 to limit the adjacent battery cells 1. The main body 32 and the first bent portion 33 can be an integral structure or a separate structure connected by a conventional fixing method. Specifically, the main body 32 fits against the first surface 122, and the first bent portion 33 is formed by bending one end of the main body 32 toward the first side surface 121. In this embodiment, while the first bending portion 33 constrains the relative misalignment of adjacent battery cells 1 along the first direction, the main body portion 32 is fixedly connected to the first surface 122 of the adjacent battery cell 1, thus forming a fixed connection to the adjacent battery cell 1, further suppressing the relative movement of the adjacent battery cells 1. For example, the fixed connection area between the main body portion 32 and the first surface 122 is larger than the connection area filled between the connecting member 2 and the adjacent shells. The main body portion 32 can provide a more reliable fixed connection, making it less likely for the adjacent battery cells 1 to move relative to each other, and also less likely for stress concentration to occur at the connecting member 2, thereby making the shell less prone to cracking.

[0036] In addition to the movement of the electrode assembly 11, the battery as a whole may also move. Specifically, the battery is usually fixed to the battery compartment using a fixing medium such as an easy-tear adhesive label, for example, the large surface of the battery is adhered to the battery compartment by the easy-tear adhesive label. To ensure the maintainability of the battery, the easy-tear adhesive label is usually applied in a localized adhesive-free manner, forming dots of adhesive between the label and the battery fixing position, so that the adhesion between the easy-tear adhesive label and the battery is not too strong, making it easy to remove the battery during maintenance and replacement. However, this also makes the battery as a whole prone to moving within the battery compartment due to weak connections. If the battery movement is controlled by increasing the amount of adhesive dots, it will make it difficult to remove the battery during maintenance and replacement.

[0037] In this embodiment, the main body 32 is disposed on and fixedly connected to the first surface 122. A strong fixed connection can be formed between the main body 32 and the first surface 122, eliminating the need to consider battery disassembly and maintenance. For example, the main body 32 and the first surface 122 can be fixedly connected by bonding, hot melting, or integral molding. Furthermore, the limiting component 3 has better rigidity than the housing 12. That is, the limiting component 3 is more rigid than the housing 12 in order to perform the limiting function. Therefore, the battery cell 1 can be connected to the battery compartment via the battery compartment fixing part 31 of the limiting component 3. Compared with the connection between the battery cell 1 and the housing 12, the limiting component 3 itself is less prone to deformation, thereby providing a more reliable connection. As a result, the battery as a whole is less likely to move, further reducing the risk of housing 12 breaking due to the battery moving relative to the battery compartment because of insecure fixing.

[0038] For example, the bending angle of the first bending portion 33 relative to the main body portion 32 can be 90°~100°, that is, the included angle between the first bending portion 33 and the main body portion 32 is 90°~100°, so as to ensure that the first bending portion 33 can effectively block the first side 121 and limit the battery cell 1.

[0039] In some embodiments, please refer to Figure 5 The main body 32 is adhered to the first surface 122 via the first adhesive layer 4. Exemplarily, the first adhesive layer 4 is double-sided adhesive, and its thickness can range from 0.01mm to 0.1mm. The main body 32 is bonded and fixed to the first surface 122 via the first adhesive layer 4, forming a strong and reliable fixation between the main body 32 and the first surface 122, reducing the risk of overall movement of the battery cell 1. Furthermore, the first adhesive layer 4 covers the main body 32. That is, the main body 32 is bonded and fixed to the first surface 122 across its entire surface via the first adhesive layer 4, resulting in a more stable and reliable connection.

[0040] In some embodiments, please refer to Figure 6 and Figure 7The limiting component 3 has a first notch 36a. The housing 12 includes a side sealing edge 126 extending from at least one second side surface 123. The side sealing edge 126 is bent toward the second side surface 123. The first notch 36a is provided at the first bending portion 33 and extends at least to the main body portion 32. The side sealing edge 126 between adjacent cells 1 is partially located within the first notch 36a. The side sealing edge 126 is bent toward the second side surface 123, that is, it is close to or folded toward the second side surface 123, so as to reduce the size of the battery along the second direction. In this embodiment, at the adjacent positions of adjacent cells 1 along the second direction, both cells 1 have side sealing edges 126 and are close to each other, or one cell 1 has a side sealing edge 126. Since the side sealing edge 126 extends from the first side surface along the first direction, the first notch 36a avoids the interference between the limiting component 3 and the side sealing edge 126. A first notch 36a is provided in the middle of the first bend 33, and one end of the side sealing edge 126 extending from the first side surface 121 is located within the first notch 36a. The first notch 36a divides the first bend 33 into at least two first sub-bends 33a along the second direction, and the first sub-bends 33a on both sides of the first notch 36a are respectively provided on the first side surface 121 of the adjacent battery cell 1. Figure 7 As shown, each battery cell 1 has a first side surface 121 corresponding to a first sub-bending portion 33a, and each first sub-bending portion 33a limits the head of the corresponding battery cell 1. Each first sub-bending portion 33a can be connected into a whole by the main body portion 32.

[0041] In some embodiments, please refer to Figure 6 and Figure 8 The limiting component 3 has a second notch 36b, and a protrusion 127 is formed at the connection between the third side 124 and the second side 123. The protrusion 127 of the adjacent battery cell 1 is located within the second notch 36b. The battery cell 1 has a protrusion 127 formed at the bottom corner where the second side 123 and the third side 124 intersect. This protrusion 127 is usually formed by encapsulation, folding, etc. The protrusion 127 of the adjacent battery cell 1 is located within the second notch 36b, that is, the second notch 36b is located in the middle of the limiting component 3 and is in contact with or close to the adjacent battery cell 1. The adjacent protrusion 127 of the adjacent battery cell 1 is located within the second notch 36b. In this way, the limiting component 3 avoids the protrusion 127 from being squeezed by the second notch 36b and damaging the bottom corner of the battery cell 1, while ensuring that the limiting component 3 can be smoothly attached to the surface of the battery cell 1.

[0042] In some embodiments, please refer to Figure 6The limiting component 3 has a third notch 36c, and the outermost protrusion 127 along the second direction is located within the third notch 36c. That is, the limiting component 3 has a third notch 36c at both ends along the second direction. Among at least two battery cells 1 arranged along the second direction, the protrusion 127 on the side of the battery cell 1 located at the end along the second direction that is away from the adjacent battery cell 1 is located within the third notch 36c. In this way, the limiting component 3 avoids being squeezed by the protrusion 127 through the third notch 36c, thus preventing the limiting component 3 from damaging the bottom corner of the battery cell 1, while ensuring that the limiting component 3 can be smoothly attached to the surface of the battery cell 1.

[0043] In some embodiments, please refer to Figure 6 , Figure 7 and Figure 10 A first insulating layer 5 is provided between the main body 32 and the housing 12. Along the second direction, the first insulating layer 5 covers the edges of the side seals 126 of two adjacent cells 1, and the overlapping portion of the first projection and the second projection is located within the projection range of the first insulating layer 5 along the third direction, so that the limiting member 3 is separated from the edge of the side seal 126. The first projection is the projection of the edge of the side seal 126 along the third direction, and the second projection is the projection of the limiting member 3 along the third direction. It can be understood that the overlapping portion being located within the projection range of the first insulating layer 5 along the third direction can mean that the edge of the overlapping portion is flush with the projection edge of the first insulating layer 5 along the third direction, or it can mean that the edge of the overlapping portion is within the projection edge of the first insulating layer 5 along the third direction. Specifically, if the edge of the side seal 126 is cut, such as after the aluminum-plastic film is cut, its edge may expose the metal aluminum layer. If the limiting member 3 is made of conductive materials such as steel sheets, the limiting member 3 will directly contact the edge of the side seal 126 with exposed conductive material, which poses a short circuit risk. In this embodiment, a first insulating layer 5 is provided at the side sealing edge 126 between the main body 32 and the housing 12, and corresponding to the side sealing edge 126 between two adjacent battery cells 1, to separate the edge of the side sealing edge 126 from the limiting member 3, thereby preventing the limiting member 3 from contacting the edge of the side sealing edge 126 and causing a short circuit. The first insulating layer 5 can be insulating tape.

[0044] To ensure reliable insulation, when the limiting member 3 has a first notch 36a and a second notch 36b, the first insulating layer 5 can be exposed at both ends of the first direction through the first notch 36a and the second notch 36b, respectively. This allows the first insulating layer 5 to cover the area of ​​the limiting member 3 located between the first notch 36a and the second notch 36b that may come into contact with the side seal 126. For example, the length of the first insulating layer 5 can extend more than 0.2 mm beyond the edges of the first notch 36a and the second notch 36b of the limiting member 3 to ensure that even if there are tolerances in the attachment of the limiting member 3, it will not cause the limiting member 3 to come into contact with the edge of the side seal 126 and short-circuit.

[0045] Further, please refer to Figure 6 , Figure 7 and Figure 10 The housing 12 also includes an arcuate portion 128 connecting the first surface 122 and the second side surface 123. This arcuate portion 128 extends along a first direction to the first side surface 121 and the third side surface 124. A first insulating layer 5 is disposed on two adjacent arcuate portions 128. That is, the first insulating layer 5 overlaps and adheres to the arcuate portions 128 of two adjacent cells 1 that are close to each other, thereby effectively covering the edge of the side sealing edge 126 at that location. The width of the first insulating layer 5 along the second direction is sufficient to effectively adhere to the arcuate portion 128 of the cell 1. The first insulating layer 5 does not extend to the first surface 122, i.e., it does not climb onto the first surface 122. The first insulating layer 5 utilizes the space formed by the arcuate portion 128, without occupying additional space, to prevent the first insulating layer 5 from overlapping with the limiting member 3 and affecting the overall size of the battery. In addition, the side sealing edge 126 between two adjacent cells 1 can also be insulated by double-folded edge dispensing; when double-folded edge dispensing is not used, insulation can be achieved by covering the edge of the side sealing edge 126 with the first insulating layer 5.

[0046] In some embodiments, please refer to Figure 11 To prevent short circuits between the limiting component 3 and the edge of the top seal of the cell 1 and the tab 111, a second insulating layer 6 can be provided between the limiting component 3 and the top seal 125 of the cell 1 for insulation. In this embodiment, a second insulating layer 6 is provided between the top seal 125 and the limiting component 3, and the second insulating layer 6 extends at least to the outside of the outer edge 125a of the top seal 125. The tab 111 of the electrode assembly 11 extends from the outer edge 125a to the outside of the top seal 125. Since there is a risk of short circuit between the tab 111 and the cut edge of the top seal 125 and the limiting component 3 after the limiting component 3 is added and the top seal 125 is bent, this embodiment avoids the above-mentioned short circuit by providing a second insulating layer 6 between the top seal 125 and the limiting component 3. Specifically, the second insulating layer 6 can be insulating tape, such as top seal insulating tape. The second insulating layer 6 extends at least to the outside of the outer edge 125a of the top sealing edge 125, thereby separating the outer edge 125a of the top sealing edge 125 of the housing 12 from the limiting member 3 for insulation.

[0047] Specifically, the second insulating layer 6 is laid on the limiting member 3 and extends to the first side 121. For example, the second insulating layer 6 is laid on the first bent portion 33 and extends to the first side 121, thereby separating and insulating the outer edge 125a of the top sealing edge 125 from the limiting member 3, and separating the tab 111 from the limiting member 3. When the second insulating layer 6 is made of insulating tape, the insulating tape can be directly pasted on the first bent portion 33 and the first side 121.

[0048] In some embodiments, please refer to Figure 1 , Figure 2 and Figure 4The housing 12 includes a second side surface 123 connected to both ends of the first surface 122 along a second direction. The limiting member 3 also includes at least one second bent portion 34 connected to at least one end of the main body 32 along the second direction. The second bent portion 34 is located on the outermost second side surface 123 along the second direction. The limiting member 3 includes at least one second bent portion 34 connected to at least one end of the main body 32 along the second direction. The second bent portion 34 forms a rigid block against the battery cell 1, constraining the movement of the electrode assembly 11 and the battery cell 1 as a whole relative to the housing 12 along the second direction. When a side sealing edge 126 is connected to the second side surface 123 and the side sealing edge 126 is bent toward the second side surface 123, the second bent portion 34 can be located on the side sealing edge 126. That is, the second bent portion 34 is indirectly located on the second side surface 123 via the side sealing edge 126 to provide a larger limiting area and achieve more reliable limiting.

[0049] For example, the bending angle of the second bending portion 34 relative to the main body portion 32 can be 90°~100°, that is, the included angle between the second bending portion 34 and the main body portion 32 is 90°~100°, so as to ensure that the second bending portion 34 can effectively block the second side 123 and limit the electrode assembly 11.

[0050] In some embodiments, please refer to Figure 1 , Figure 2 and Figure 4 The housing 12 includes a third side surface 124, which is connected to the first side surface 121 at both ends of the first surface 122 along a first direction. The limiting member 3 also includes a third bent portion 35, which is connected to the main body 32 and bends toward the third side surface 124. The third bent portion 35 is disposed on the third side surface 124 of at least two battery cells 1. The main body 32 and the third bent portion 35 can be an integral structure or a separate structure connected by a conventional fixing method. That is, the third bent portion 35 bends from one end of the main body 32 toward the third side surface 124 and is disposed on the third side surface 124 of at least two adjacent battery cells 1, thereby further limiting the relative movement of adjacent battery cells 1. The limiting component 3 includes a first bending portion 33 and a third bending portion 35, which work together to form a rigid block on the entire battery cell 1 and the electrode assembly 11. That is, it can constrain the electrode assembly 11 and the entire battery cell 1 from moving along the first direction relative to the housing 12, and at the same time, it can constrain the relative misalignment of different battery cells.

[0051] For example, the bending angle of the third bending portion 35 relative to the main body portion 32 can be 90°~100°, that is, the included angle between the third bending portion 35 and the main body portion 32 is 90°~100°, so as to ensure that the third bending portion 35 can effectively limit the battery cell 1.

[0052] In a specific example, the limiting component 3 is provided with bending portions around the battery cell group composed of multiple battery cells 1. That is, the limiting component 3 includes a first bending portion 33 located on the first side 121, two second bending portions 34 located on the outermost second side 123 along the second direction, and a third bending portion 35 located on the third side 124, thereby limiting the battery cell group around the whole, thereby comprehensively and effectively suppressing the movement of the electrode assembly 11 and preventing the housing 12 from being broken by the impact of the electrode assembly 11.

[0053] It should be noted that, among the aforementioned bends in the limiting component 3, the third bend 35 and the second bends 34 located on both sides can be selectively provided, either one or more, according to actual limiting requirements. That is, with only the first bend 33 provided, the limiting component 3 can limit the misalignment of adjacent cells 1, thereby protecting the housing 12. With the further provision of the second bend 34 and / or the third bend 35, the misalignment of adjacent cells 1 can be better limited, and the movement along the second direction can be further limited, thus achieving more comprehensive four-sided limiting.

[0054] In some embodiments, at least one of the following is provided: between the first bent portion 33 and the first side surface 121; between the second bent portion 34 and the second side surface 123; and between the third bent portion 35 and the third side surface 124. Taking the provision of a buffer pad between the first bent portion 33 and the first side surface 121 as an example, by providing a buffer pad between the first bent portion 33 and the first side surface 121, when the electrode assembly 11 moves and impacts the first bent portion 33, the buffer pad can buffer and absorb energy, preventing rigid impact between the electrode assembly 11 and the first bent portion 33, thereby further protecting the housing 12 from being broken by impact. The buffer pad can be fixed to the first bent portion 33 or to the first side surface 121 by bonding, embedding, or other methods; this application does not impose any limitations on this.

[0055] For example, the buffer pad includes double-sided adhesive or foam adhesive, and is bonded to the first bent portion 33 and the first side surface 121 respectively. Thus, while providing cushioning, the buffer pad also assists in fixing the first bent portion 33 to the battery cell 1, further enhancing the reliability of the fixation between the limiting component 3 and the battery cell 1. It is understood that the material of the buffer pad is not limited to foam adhesive and double-sided adhesive, but can also be a silicone pad, a rubber pad, or other elastic cushioning materials.

[0056] In one example, the size of the buffer pad between the first bend 33 and the first side 121 along the first direction is in the range of 0.05mm to 0.15mm. Using a buffer pad within the above thickness range can provide good buffering while occupying less space, thereby reducing the impact on battery energy density.

[0057] A buffer pad can also be provided between the second bend 34 and the second side 123, and a buffer pad can also be provided between the third bend 35 and the third side 124. The specific arrangement and function are similar to the function of the buffer pad 5 provided between the first bend 33 and the first side 121, and will not be described in detail here.

[0058] In some embodiments, please refer to Figure 6 and Figure 9 The housing 12 also includes an arcuate portion 128 connecting the first surface 122 and the second side surface 123. The arcuate portion 128 extends along a first direction to the first side surface 121. The limiting member 3 includes a fourth notch 36d, which is located between the first bent portion 33 and the second bent portion 34 and extends at least to the main body portion 32. One end of the arcuate portion 128 connected to the first side surface 121 is exposed through the fourth notch 36d. It is understood that the connection between the first surface 122 and the second side surface 123 of the cell 1 is usually at least partially arcuate due to the winding or stacking process, i.e., forming the aforementioned arcuate portion 128, which can specifically be arc-shaped. Therefore, if the second bent portion 34 extends along the arcuate portion 128 to form an arcuate limiting portion, the notch 36 allows the first bent portion 33 to bend better at the arcuate limiting portion without being affected by it.

[0059] Furthermore, the arc-shaped portion 128 extends along the first direction to the third side surface 124. One end of the arc-shaped portion 128 connected to the third side surface 124 can be exposed through the second notch 36b and the third notch 36c, so that the third bending portion 35 can be bent better at the arc-shaped limiting portion and is not affected by the arc-shaped limiting portion.

[0060] The dimensions of each notch at each of the above locations can be further defined to better fit the arc-shaped portion 128 and the protrusion 127, which will be explained below.

[0061] In some embodiments, please refer to Figure 8 For the third notch 36c located between the second bend 34 and the third bend 35, the distance L1 between its edge and the third side surface 124 can be 0.2mm to 5mm, thereby maximizing the limiting area of ​​the battery cell 1 while preventing the second bend 34 and the third bend 35 from being restricted in bending. The distance between the edge of the third notch 36c and the arc-shaped portion 128 can also be 0mm to 2mm.

[0062] In some embodiments, please refer to Figure 8The distance L2 between the edge of the third notch 36c and the edge of the battery cell 1 along the second direction is 0.5mm to 5mm. In this embodiment, for the third notch 36c, in addition to considering the arc-shaped portion 128 of the battery cell 1, the protrusions 127 on both sides of the battery cell 1 also need to be considered. Therefore, the distance between the edge of the third notch 36c and the edge of the battery cell 1 can be 0.5mm to 5mm. It can be understood that when the housing 12 includes the side sealing edge 126, the edge of the battery cell 1 refers to the side sealing edge 126; when the side sealing edge 126 is not included, the edge of the battery cell 1 refers to the second side surface 123. The third notch 36c needs to avoid both the arc-shaped portion 128 and the protrusions 127 at the tail of the battery cell 1. Therefore, the lower limit of the distance between the third notch 36c and the edge of the battery cell 1 is 0.5mm. This effectively avoids the protrusions 127 of the battery cell 1 while preventing the limiting component 3 from being restricted in bending, thus preventing the protrusions 127 from being damaged by the limiting component 3.

[0063] In some embodiments, please refer to Figure 9 The distance L3 between the edge of the fourth notch 36d located between the first bend 33 and the second bend 34 and the arc-shaped portion 128 is 0mm to 2mm. The distance between the edge of the fourth notch 36d and the arc-shaped portion 128 can be 0mm to 2mm, thereby preventing the first bend 33 and the second bend 34 of the limiting member 3 from being restricted in bending, and at the same time reducing the risk of the limiting member 3 causing the cell 1 to deform.

[0064] In some embodiments, please refer to Figure 9 The distance L4 between the edge of the fourth notch 36d and the first side surface 121 is 0.2mm to 5mm. In this embodiment, for the fourth notch 36d located between the first bent portion 33 and the second bent portion 34, the distance between its edge and the first side surface 121 can be 0.2mm to 5mm, thereby preventing the first bent portion 33 and the second bent portion 34 from being restricted in bending while maximizing the limiting area of ​​the battery cell 1.

[0065] In some embodiments, please refer to Figure 7 and Figure 9 The first bending portion 33 can further extend along the second direction to at least one side to increase the limiting area with the first side 121. In this embodiment, the dimension of the fourth notch 36d along the second direction is greater than the distance between the first bending portion 33 and the second bending portion 34 along the second direction. Thus, by reasonably limiting the dimensions of the fourth notch 36d and the first bending portion 33, it is possible to avoid the limiting component 3 from being restricted in bending and squeezing the corner of the battery cell 1, while maximizing the limiting area of ​​the first bending portion 33 on the battery cell 1, thereby balancing assembly reliability and limiting effect.

[0066] In some embodiments, the first bend 33 at the first notch 36a can adopt a similar design as described above, and the spacing between adjacent first sub-bends 33a along the second direction is smaller than the size of the first notch 36a along the second direction, which can also increase the limiting area of ​​the first bend 33 on the cell 1.

[0067] For example, please refer to Figure 9 With the side sealing edge 126 provided, the distance between the first bent portion 33 and the side sealing edge 126 is 0.2mm to 3mm. That is, the dimension L5 between the first bent portion 33 and the side sealing edge 126 of the battery cell 1 can be 0.2mm to 3mm. This maximizes the limiting area of ​​the first bent portion 33 on the battery cell 1, while avoiding interference between the first bent portion 33 and the side sealing edge 126.

[0068] In the above embodiments, the shape of the notch can be arc-shaped, rectangular, trapezoidal, or other shapes that adapt to the corner contour of the battery cell 1. This application does not limit the specific shape of the notch.

[0069] In some embodiments, the portion of the limiting member 3 located on the first side 121 has a dimension ranging from 0.05 mm to 0.2 mm along the first direction. That is, the thickness of the portion of the limiting member 3 located on the first side 121 (e.g., the first bent portion 33) along the first direction is 0.05 mm to 0.2 mm. Limiting the thickness of this portion of the limiting member 3 to the range of 0.05 mm to 0.2 mm ensures, on the one hand, that the limiting member 3 has sufficient rigidity and strength to reliably limit the cell 1, preventing deformation or failure due to the impact of the cell 1's movement; on the other hand, the thickness is not excessive, thereby minimizing the space occupied by the limiting member 3 in the first direction, avoiding an increase in the battery's packaging space, and thus avoiding a reduction in the battery's energy density. For example, the thickness of the limiting member 3 along the first direction can be 0.05 mm, 0.08 mm, 0.1 mm, 0.12 mm, 0.15 mm, 0.18 mm, 0.2 mm, or any value within the range of 0.05 mm to 0.2 mm. In a specific example, the limiting component 3 is a steel sheet with a thickness of 0.05mm to 0.2mm.

[0070] When the limiting member 3 includes the aforementioned main body 32, first bent portion 33, second bent portion 34, and third bent portion 35, the overall thickness of the limiting member 3 can be uniformly set within the range of 0.05mm to 0.2mm. That is, the dimensions of the first bent portion 33 and the third bent portion 35 in the first direction are within the range of 0.05mm to 0.2mm, the dimensions of the main body 32 in the third direction are within the range of 0.05mm to 0.2mm, and the dimensions of the second bent portion 34 in the second direction are within the range of 0.05mm to 0.2mm.

[0071] In some embodiments, there is a gap between the connected battery cells 1. The connecting component 2 includes a main connecting portion 21 and an extension portion 22 connected to the main connecting portion 21. The main connecting portion 21 is disposed on the first side surface 121 of at least two battery cells 1, and the extension portion 22 is disposed in the gap and fixedly connected to the housing 12 on both sides of the gap. Specifically, the housing 12 includes two second side surfaces 123, respectively located at both ends of the first side surface 121 along the second direction, and a gap is formed between adjacent second side surfaces 123. That is, the main connecting portion 21 is located in the area where the first side surface 121 of the adjacent battery cells 1 is located, specifically corresponding to the location of the protection plate 7. The extension portion 22 extends from the main connecting portion 21 along the first direction and fills the gap between the adjacent battery cells 1, and is fixedly connected to the surface of the housing 12 at the gap, thereby connecting and fixing the two adjacent battery cells 1 into one unit at the gap. Exemplarily, the connecting component 2 is integrally formed by injection molding, and the injection molding material fills the gap and cures to form the main connecting portion 21 and the extension portion 22.

[0072] Since the gap between adjacent cells 1 is precisely the location where plastic material easily overflows and adheres to the housing 12 during injection molding, this embodiment uses a limiting component 3 to limit the first side 121 of the adjacent cells 1. The limiting component 3 is located on the first side 121 and is closer to the extension 22. While constraining the relative misalignment between adjacent cells 1, it can better prevent the connection between the extension 22 and the housing 12 from being subjected to local stress due to the misalignment of adjacent cells 1 under conditions such as drops, thereby preventing the housing 12 from being partially broken at that location.

[0073] It should be noted that the aforementioned gap can be formed by the aforementioned arc-shaped portion 128. The second side 123 includes an arc-shaped portion 128 connected to the first side. The second side 123 of two adjacent battery cells 1 that are close to each other are curved away from each other due to the presence of the arc-shaped portion 128, thereby forming a gap between the two battery cells 1.

[0074] Furthermore, when the limiting member 3 has a first notch 36a, the extension 22 does not exceed the first notch 36a in the second direction. That is, the size of the extension 22 in the second direction is limited within the range of the first notch 36a, avoiding additional space occupation.

[0075] In some embodiments, the battery further includes a protection board 7, which protects the battery cell 1 and, if necessary, connects the battery cell 1 to external electronic devices, and controls the charging and discharging of the battery cell 1. Depending on the required functions, the protection board 7 is equipped with corresponding components 71. To improve the battery's energy density, the battery can have two or more battery cells 1, and the protection board 7 can be connected to at least two of the battery cells 1. The components 71 on the protection board 7 include, but are not limited to, ICs (integrated circuits), Gauge ICs (battery management chips), Power MOSFETs (electric field-effect transistors), Signal MOSFETs (metal-oxide-semiconductor field-effect transistors), Zener diodes, resistors, transistors, etc.

[0076] In this embodiment, the protective plate 7 is disposed on one side of the first side surface 121 and is electrically connected to the electrode assembly 11. The protective plate 7 is disposed on the side of the first side surface 121 of the battery cell 1, that is, the protective plate 7 is disposed along the first direction on the side of the first side surface 121 away from the electrode assembly 11. For example, the side of the protective plate 7 with the component 71 is disposed facing the first side surface 121 or away from the first side surface 121. In this embodiment, along the first direction, the limiting member 3 is at least partially located between the protective plate 7 and the first side surface 121. That is, at least a portion of the limiting member 3 is inserted into the space between the protective plate 7 and the first side surface 121 and is opposite to the first side surface 121 in the first direction, thus forming a block between the electrode assembly 11 and the protective plate 7. When the electrode assembly 11 has a tendency to move towards the protective plate 7, its movement is limited by the blocking effect of the limiting member 3.

[0077] Specifically, the first bend 33 is located between the protective plate 7 and the first side 121, so that the first bend 33 will block the electrode assembly 11, preventing the electrode assembly 11 from impacting the first side 121 and causing the first side 121 to bulge outward and crack, and at the same time preventing the electrode assembly 11 from squeezing the component 71 on the protective plate 7 through the first side 121 and causing damage to the component 71.

[0078] In some embodiments, please refer to Figure 9The housing 12 includes a top sealing edge 125 extending from the first side 121. The top sealing edge 125 is bent toward the first side 121, and the limiting member 3 is at least partially located on the side of the top sealing edge 125 facing the first side 121. In this embodiment, the top sealing edge 125 extends from the first side 121 and is bent toward the first side 121, thereby reducing the space occupied by the top sealing edge 125 in the first direction. The protective plate 7 can be disposed in the space released after the top sealing edge 125 is bent, further improving the space utilization and energy density of the battery. The limiting member 3 is at least partially located (such as the first bent portion 33) on the side of the top sealing edge 125 facing the first side 121 in the first direction. In this way, the limiting member 3 will not interfere with the tabs 111 of the electrode assembly 11, which facilitates its layout and does not require avoidance with the tabs 111.

[0079] For example, along the first direction, at least a portion of the limiting member 3 (such as the first bent portion 33) is located between the top sealing edge 125 and the first side surface 121. Therefore, the limiting member 3 does not need to avoid the tab 111, and the limiting member 3 can extend between the top sealing edge 125 and the first side surface 121. Consequently, the limiting area of ​​the limiting member 3 and the first side surface 121 is relatively large, which is beneficial for providing a more reliable limiting effect. In this example, at least a portion of the limiting member 3 is located on the portion of the first side surface 121 opposite to the top sealing edge 125. In other examples, at least a portion of the limiting member 3 may also be located on the portion of the first side surface 121 not opposite to the top sealing edge 125.

[0080] In some embodiments, the limiting member 3 is at least partially located between the top sealing edge 125 and the first side surface 121, and the portion of the limiting member 3 between the top sealing edge 125 and the first side surface 121 includes a first surface facing the first side surface 121, a second surface facing away from the first side surface 121, and a third surface connecting the first surface and the second surface, with an arcuate transition between the first surface and the third surface and / or between the second surface and the third surface. In this embodiment, since the limiting member 3 is at least partially located between the top sealing edge 125 and the first side surface 121, if the edge of the limiting member 3 is sharp, it can easily scratch the first side surface 121 or the top sealing edge 125. Therefore, by making an arcuate transition between the first surface and the third surface, or an arcuate transition between the second surface and the third surface, or an arcuate transition between both the first surface and the third surface and an arcuate transition between the second surface and the third surface, i.e., rounding the edge of the limiting member 3, the sharp edge of the limiting member 3 can be prevented from scratching the housing 12, thereby avoiding problems such as cracking and leakage caused by scratches on the housing 12.

[0081] In some embodiments, the edge of the limiting member 3 located between the top sealing edge 125 and the first side surface 121 is covered with a protective layer. In this embodiment, the protective layer can be insulating tape or an insulating coating, etc. By covering the edge of the limiting member 3 with a protective layer, the sharp edge of the limiting member 3 can be prevented from directly contacting the housing 12, thereby preventing the edge of the limiting member 3 from scratching the housing 12 and further improving the reliability and safety of the battery.

[0082] It should be noted that the two schemes of arc transition and protective cover in the above embodiments can be set either one or both, so as to more reliably avoid the edge of the limiting component 3 scratching the shell 12.

[0083] Based on the batteries provided in the above embodiments, this application also provides an electrical device, which includes any of the batteries described in the above embodiments. Since this electrical device uses the batteries described in the above embodiments, the beneficial effects of this electrical device can be found in the above embodiments.

[0084] The power device can be any battery-powered device, such as a mobile phone, tablet, laptop, wearable device, drone, power tool, or energy storage device. The power device has a battery compartment for housing the battery, and the battery is secured inside the battery compartment by a battery compartment fixing part with a limiting member.

[0085] 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.

[0086] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery, characterized in that, include: At least two battery cells (1), each battery cell (1) includes an electrode assembly (11) and a housing (12), the electrode assembly (11) is disposed inside the housing (12), the housing (12) has a first side surface (121), the first side surface (121) is located at one end of the housing (12) along a first direction, and at least two of the battery cells (1) are distributed along a second direction, the first direction being perpendicular to the second direction; A connecting component (2) is at least partially filled between two adjacent cells (1) and fixedly connected to an adjacent housing (12); The limiting component (3) has a battery compartment fixing part (31), and the limiting component (3) is at least partially disposed on the first side (121) of at least two of the battery cells (1).

2. The battery according to claim 1, characterized in that, The housing (12) includes a first surface (122), and the first side surface (121) is connected to one end of the first surface (122) along the first direction; the limiting member (3) includes a main body (32) and a first bending portion (33) connected to the main body (32), and the first bending portion (33) is provided on the first side surface (121) of at least two of the battery cells (1). The main body (32) is fixed to the first surface (122) of at least two adjacent cells (1), or the main body (32) is adhered to the first surface (122) of at least two cells (1) by a first adhesive layer (4).

3. The battery according to claim 2, characterized in that, The housing (12) includes two second side surfaces (123) and a side sealing edge (126) extending from at least one of the second side surfaces (123). The two second side surfaces (123) are respectively connected to the two ends of the first surface (122) along the second direction, and the side sealing edge (126) is bent toward the second side surface (123). The limiting component (3) is provided with a first notch (36a), which is located at the first bending portion (33) and extends at least to the main body portion (32). The side sealing edge (126) between two adjacent cells (1) is located within the first notch (36a).

4. The battery according to claim 3, characterized in that, A first insulating layer (5) is provided between the main body (32) and the housing (12). Along the second direction, the first insulating layer (5) covers the edge of the side sealing edge (126) of two adjacent cells (1). Along the third direction, the overlapping part of the projection of the side sealing edge (126) and the projection of the limiting member (3) is located within the projection range of the first insulating layer (5). The first direction, the second direction and the third direction are perpendicular to each other.

5. The battery according to claim 3, characterized in that, The housing (12) includes a third side surface (124), the third side surface (124) and the first side surface (121) are respectively connected to the two ends of the first surface (122) along the first direction, and a protrusion (127) is formed at the connection between the third side surface (124) and the second side surface (123). The limiting component (3) is provided with a second notch (36b), and the protrusions (127) of the two adjacent cells (1) are located in the second notch (36b).

6. The battery according to any one of claims 2-5, characterized in that, The housing (12) includes a second side surface (123) connected to both ends of the first surface (122) along the second direction, and the limiting member (3) further includes at least one second bend (34) connected to at least one end of the main body (32) along the second direction, the second bend (34) being disposed on the outermost second side surface (123) along the second direction.

7. The battery according to claim 6, characterized in that, The housing (12) includes an arcuate portion (128) connecting the first surface (122) and the second side surface (123), the arcuate portion (128) extending along the first direction to the first side surface (121), the limiting member (3) including a fourth notch (36d), the fourth notch (36d) being located between the first bent portion (33) and the second bent portion (34) and extending at least to the main body portion (32), one end of the arcuate portion (128) connected to the first side surface (121) being exposed by the fourth notch (36d).

8. The battery according to claim 7, characterized in that, The dimension of the fourth notch (36d) along the second direction is greater than the distance between the first bend (33) and the second bend (34) along the second direction.

9. The battery according to claim 1, characterized in that, A gap is formed between two adjacent battery cells (1); The connecting component (2) includes a main connecting part (21) and an extension part (22) connected to the main connecting part (21). The main connecting part (21) is disposed on the first side (121) of at least two of the cells (1). The extension part (22) is disposed in the gap and is fixedly connected to the housing (12) on both sides of the gap.

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

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